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TECHNICAL DESCRIPTION AND OPERATING INSTRUCTIONS
PART I. TECHNICAL DESCRIPTION
1. PURPOSE
Semiconductor induction mine detector for individual use IMP is designed to search for anti-tank and anti-personnel mines, installed in the ground (snow), whose bodies or fuses are made of metal.
The mine detector allows you to detect mines installed in the bush, grass and fords.
2. TECHNICAL DATA
1. Depth of detection by a mine detector of mines installed in the ground (snow), cm, not less than:
a) anti-tank mine TM-46 ...... 40
b) anti-tank mine TMD-B ..... 12
c) anti-personnel mine PMD-6 with a metal fuse MUV ........ 8
2. The width of the mine search zone with a mine detector, cm:
a) for mines TM-46, not less ...... 30
b) for TMD-B mines ........ 20 ± 5
c) for mines PMD-6 ........ 20 ± 5
3. The mine detector allows you to search for mines in the water with the immersion of the search element to a depth, m .. up to 1
4. Residual voltage level, mV, no more than .. 80
5. Stable operation of the mine detector without adjustment, min., not less than 10
6. Distance between two working mine detectors, m, not less than ......... 7
7. Current sources - elements 373 GOST 12333-74 with a total voltage of 5.0 to 6.2 V, pcs. ... four
8. Period of continuous operation with one set of current sources, h, not less than....... 100
9. Operating temperature range, K from 243 to 323
10. The total mass of the mine detector, kg, no more ... 6.6
11. Weight of the search engine, kg, no more.... 2.4
3. COMPOSITION OF THE PRODUCT
The composition of the mine detector includes the following main elements and components:
1. Search element..... ... 1 pc.
2. Amplifying block.... 1 pc.
3. Rod (three knees) 1 pc.
4. Phones head ... 1 pc.
5. Bag..... 1 piece
6. Stacking case......... 1 pc.
7. Belt....... 1 piece
8. Setting equivalent.... . 1 PC.
9. Screwdriver ...... pcs.
10. Grinding skin (10 cm 2). 1 PC.
11. Technical description and instruction manual 1 copy.
12. Form ............... 1 copy.
Elements 373 GOST 12333-74 are not supplied by the factory.
Rice. 1. Composition of the product
1 - search element; 2 - amplifying block; 3 - barbell (three knees); 4 - head phones; 5 - bag; 6 - stowage case; 7 - belt; 8 - setting equivalent; 9 - screwdriver.
4. DESIGN AND OPERATION OF THE PRODUCT
In the search element of the mine detector, two receiving and one generator coils are placed. The receiving coils are located in the electromagnetic field of the generator coil so that the total e. d.s. induced in them is approximately equal to zero.
To compensate for the unbalance voltage of the receiving coils due to changes in temperature and nature environment serves as a phase-amplitude compensator.
A change in the connection between the transmitter and receiver coils of the search element when metal objects are introduced into the field of the transmitter coil causes an unbalance signal, which is amplified by the amplifier and heard in telephones.
5. DEVICE OF COMPONENT PARTS OF THE PRODUCT
5.1. search element
The search element is a frame, in the grooves of which the generator and two receiving coils are installed. At one end of the frame there is a generator loop capacitor.
ATTENTION! Protect the search element from shock.
Search element frame fig. 2 is placed in casing 6, which protects it from mechanical damage. The casing consists of two parts glued in the middle and is closed with a union nut 3. A seal is installed under the union nut between the casing and the frame.
The threaded part of the union nut is coated with moisture-resistant grease.
The connection of the search element with the amplifying unit is carried out by cable 2 with the insertion of the ShR connector.
The search element is connected to the holder 4 by means of a clamp 5 enclosing the casing.
To eliminate the influence of the rod metal on the search element, the holder is made of textolite.
Rice. 2. Search element
1 - connector insert ШР20; 2 - cable; 3 - nut; 4 - holder; 5 - collar; 6 - casing.
The location of the clamp on the casing is strictly fixed, which corresponds to the least influence of the metal parts of the rod on the operation of the search system.
ATTENTION! Install the frame of the search element into the casing with the mark towards the holder.
ATTENTION! Disassembly of the search element in the field is unacceptable.
5.2. Amplifying block
Reinforcing block fig. 3 consists of two parts: a duralumin base 10 with a top cover 3 and a steel box 11 with a hinged bottom cover 15.
A board 16 is installed on the base, on which elements of the generator and amplifier, and potentiometers of the phase-amplitude compensator 9 are mounted, there is a compartment for current sources.
On the top cover 3 are placed:
Connector block ШР 20 for connecting the cable of the search element with the amplifying unit;
Cap 5, which is screwed onto the Shr 20 connector block in the non-working state and serves to protect the connector parts from damage, contamination and moisture ingress;
Telephone jacks 6, into which the telephone plug is inserted during operation;
Toggle switch 7 for turning on and off current sources;
Two knobs 8 of the compensator, which serve to fine-tune the mine detector.
The axes of two coarse-tuning potentiometers of the phase-amplitude compensator 9 are brought out through the cover 3 under the slot.
The base is fixed to the box with the help of two screws 4. Carabiners 12 are installed on the side walls of the box, which serve to fasten the shoulder strap when working with a mine detector without a canvas bag.
The box has a hinged bottom cover 15 connected to it by means of a hinge and a lock 13. The bottom cover is designed for access to the power source compartment and for connecting 14 power sources to each other using a contact spring.
Rice. 3. Amplifying block
1 - compartment of current sources; 2 - sealant; 3 - top cover; 4 - screw; 5 - cap; 6 - nest; 7 - toggle switch; 8 - handle; 9 - phase-amplitude compensator; 10 - base; 11 - box; 12 - carbine; 13 - lock; 14 - spring; 15 - bottom cover; 16 - board.
A rubber seal 2 is installed between the top cover and the base. A seal is also installed on the bottom cover. For ease of use, the amplifying unit is placed in a canvas bag.
5.3. Barbell
For ease of transportation and the ability of the sapper to work in the "lying" or "standing" position, the rod is collapsible and consists of three knees made of duralumin pipes. The articulation of the knees of the rod between themselves and with the holder of the search element is threaded.
Rice. 4. Rod
5.4. Packing case
The stowage case is made of duralumin and is designed to accommodate all mine detector components during transportation and carrying. The lid is hinged to the case and closed with two tension locks. Brackets are installed inside the stacking case to secure the mine detector assemblies.
Rice. 5. Packing case
The stowage case is adapted for carrying in hands and behind the back.
PART II. USER MANUAL
The IMP mine detector during operation is serviced by one person.
1. DEPLOYING THE MINE DETECTOR TO WORK IN THE "STANDING" POSITION
To assemble the mine detector, you must do the following:
Open the lid of the packing case;
Remove from the packing case: phone, canvas bag, search element with a holder, amplifying unit, three rod elbows;
Close the lid of the stacking case;
Assemble the rod knees, screw them to the search element holder;
Loosen the swivel of the search element clamp with the holder, for which turn the nut counterclockwise;
Set the required angle of inclination of the rod relative to the search element and tighten the nut to the full;
Insert the cable into the grooves of the clamps on the rod;
Install current sources;
Put the amplifying unit in a canvas bag;
Put a canvas bag on your right shoulder, while the connecting cable should be behind your back, adjust the length of the belt, connect the cable to the amplifying unit;
Put on phones and connect them with a plug to an amplifying unit;
Set the toggle switch to the "ON" position;
Set up the mine detector and check its performance with the equivalent of the setting.
2. DEPLOYING THE MINE DETECTOR TO WORK IN THE "LYING" POSITION
The procedure for assembling a mine detector for working in the "lying" position is the same as for assembling a mine detector for working in the "standing" position.
Assembly features:
the search element and the holder are fixed parallel to each other, the canvas bag is fixed on the waist belt; a rod elbow with a plug is attached to the holder.
Rice. 6. General form IMP device for work in the "standing" position
3. ROLLING THE MINO DETECTOR
After working with a mine detector, you must:
Set the toggle switch to the "OFF" position;
Disconnect the cable connector insert and telephone plug from the amplifying unit;
Remove phones;
Wrap the cap on the connector block;
Disconnect the cable from the rod;
Disassemble the bar;
Loosen the nut and turn the holder to its original position parallel to the search element; remove the amplifying unit from the canvas bag; - extract current sources;
Clean the elements of the mine detector from dust, dirt and moisture and put it in a packing case; - close the cover of the stacking case.
Rice. Fig. 7. General view of the IMP device for working in the "lying" position
ATTENTION! Turning the holder without first loosening the nut leads to breakage of the parts connecting the search element with the holder.
4. INSTALLATION OF POWER SOURCES
Install current sources in the following sequence:
Open the bottom cover of the amplifying unit;
Install the current sources in the compartment according to the diagram indicated on the bottom cover of the unit.
Close the bottom cover of the unit.
ATTENTION! If the current sources are installed incorrectly, the mine detector will not work.
After completion of work, remove the power sources and store separately.
5. MINO DETECTOR SETUP
After installing the current sources and assembling the mine detector, set it up, for which: take the mine detector in your right hand and, holding it above the ground at a height of 10 to 12 cm, slowly rotate the knobs of the amplifying unit compensator with your left hand until the main tone disappears in the telephones.
In this case, only a weak control tone of a higher frequency or noise should be heard in the phones.
Check the operation of the mine detector by approaching the search element of the equivalent setting at a distance of 10 cm. In this case, the sound of the main frequency should appear in the phones.
With temperature differences from 243 to 323 K, compensation may be lost. In this case it is necessary:
set the axes of the fine adjustment potentiometers to the middle position and compensate using the coarse adjustment potentiometers.
ATTENTION! When setting up a mine detector, the search element must be positioned so that there are no metal objects within a radius of one and a half meters from it.
6. ORDER OF WORK WITH THE MINO DETECTOR
Holding the search element by the bar and continuously moving it in front of you to the right and left, move forward in a given direction. In this case, it is necessary to ensure that the search element moves parallel to the ground surface at a distance of 5 to 7 cm from it. When moving along the reconnaissance strip, the sapper must move the search element forward no more than half of its length, while it is necessary to carefully ensure that the entire area of the reconnaissance area is examined by the mine detector.
Having heard a signal on the phones (the appearance of a fundamental tone), the sapper must stop and clarify the location of the mine.
Depending on the task, he must either start extracting the mine, or designate its location.
To determine the location of the mine, the search element must be carefully moved forward, where the appearance of the signal was recorded, until it is received in the phones
minimum sound. If, with a further slight movement of the search element forward or backward, the signal in the phones increases, then the mine is located under the center of the search element. If, when moving the search element forward, the signal in the phones does not increase, then it is necessary, by moving the search element back, to locate the mine using the same method.
The mine is located under the center of the search element only if, when moving it forward or backward, the signal in the phones increases.
As necessary, the mine detector should be adjusted, achieving the minimum volume of the main tone.
It should be remembered that the sensitivity of the mine detector is determined by the thoroughness of its settings.
In all other respects, strictly follow the requirements of the instructions for safety measures when clearing the area.
ATTENTION! Small metal masses (fuzes) can cause a weak signal, so when searching, the sapper must pay attention Special attention to detect these signals.
Features of the operation of the mine detector when searching
on the fords
When clearing fords, the mine detector is assembled to work in the "standing" position.
The length of the strap of the bag with the reinforcement block must be adjusted so that the bag does not touch the water.
The assembled mine detector is adjusted in the usual manner on land, and then, when the search element is lowered into the water to a depth of 1 m, the mine detector is adjusted.
When setting up a mine detector in water, the search element must be removed from the ground at a distance of 10 to 20 cm.
ATTENTION! Before lowering the search element into the water, it is necessary to completely tighten the cap nut to prevent water from entering.
7. GENERAL MALFUNCTIONS AND THEIR REMEDIES
| Item No. | Typical malfunction | Probable Cause | Elimination Methods |
| 1 | The phones are listening to rustles and cods. | Bad contacts at the junction of current sources. Bad contact in the plug. |
Check connections and clean contacts. Check or wipe the plug contacts. |
| 2 | When the toggle switch is turned on, the mine detector does not work (no sound on phones). |
Current sources are not connected correctly. The voltage of current sources is less than 5.0 V. Break in the telephone circuit. |
Check that the current sources are switched on correctly. Change power sources. Change phones. Check the telephone circuit with an ohmmeter, in the place of the break - solder. |
| 3 | When tapping on the amplifying unit, the sound in the phones disappears. | Bad contacts in places of rations. | Check the condition of the rations and troubleshoot. |
| 4 | Lack of compensation limits. | The axes of the coarse adjustment potentiometers have turned. A sharp change in climatic conditions. |
Set the axes of the fine adjustment potentiometers to the middle position and compensate using the coarse adjustment potentiometers. |
Unpainted places, scratches and nicks should be painted or smeared with a thin layer of CIATIM-201 lubricant;
Place the mine detector in the stowage case.
The depreservation of the mine detector should be carried out in the following order:
Remove the mine detector from the stowage case; - remove old grease from the outer lubricated surfaces of the mine detector;
Assemble the mine detector.
10. STORAGE RULES
Before putting mine detectors into storage, power sources must be removed and stored separately.
Mine detectors in the field should be stored in stowage cases, which should be covered or located indoors to prevent dust, dirt or water from entering the cases.
During long breaks in operation (up to 6 months), mine detectors should be stored in dry rooms
on racks in stacking cases.
The ambient temperature must be at least 283 K, relative humidity no more than 70%.
Storage of a mine detector for more than 6 months must be carried out in accordance with the "Guidelines for the storage of engineering weapons and property vehicles" of the 1963 edition.
11. TRANSPORTATION
Transportation of mine detectors during operation can be carried out manually or by any type of vehicles (on ships, aircraft, cars, railway and etc.).
To transport the mine detector using a shoulder strap, you must:
fasten the shoulder strap to the carabiners of the packing case, put the straps on the shoulders.
Transportation of mine detectors vehicles carried out in packing cases.
ATTENTION! Transportation of mine detectors should be carried out only with the current sources removed.
APPENDIX
Data table of winding products of the "IMP" device
| Transformer number according to the drawing. Designation on the circuit diagram. |
Circuit diagram | Core | Winding | Pin designation (beginning-end) |
Electrical parameters | Note | ||||
| iron type | Sectional area, mm 2 | Winding number | Wire brand and diameter, mm | Number of turns | Winding resistance at 293K, Ohm | Winding inductance, mH | ||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Tr1 RB5.731.097 |
 |
Alloy 79NM W6.3x9 |
56,7 | I II |
PEV-1-0.06 PEV-1-0.06 |
3700 1400 |
2-3 5-4 |
980±15% 450±15% |
At least 2400 At least 320 |
|
| Tr2, Tr3 RB5.731.098 |
 |
Alloy 79NM W6.3x9 |
56,7 | I II |
PEV-1-0.06 PEV-1-0.06 |
1000 3000 500 |
2-6 6-3 4-5 |
1100±15% 155±15% |
1900-2500 At least 50 |
|
| Generator coil L2 RB5.689.013 |
Steel E-330 | PEV-2-0.33 PEV-2-0.33 PEV-2-0.33 PEV-2-0.33 PEV-2-0.33 PEV-2-0.33 |
238 237 237 218 20 20 |
1-2 2-3 3-4 4-5 5-6 6-7 |
13±10 | 45±10 | Resistance and inductance values measured between terminals 1-6 | |||
| Receiving coils L1, L3 RB5.764.014 |
PEV-2-0.1 | 3500 | N-K | 1400±10 | 400±10 | |||||
Note. The inductance is measured at a frequency of 1000 Hz at a voltage of 0.5 V.
Schematic diagram of the IMP mine detector
Rice. eight.
DEVICE IMP. BASIC ELECTRICAL DIAGRAM RB2.471.003 SkhE
1. The gains of transistors T1 and T2 should not differ by more than 10%.
2. Capacitors C7 * and C10 *, cores E1 and E2 are installed if necessary.
3. In positions C5 and C14, it is allowed to use capacitors K53-1-6-22 ± 30% and K53-1-15-15 ± 30%, respectively. OZHO. 464.023TU
4. OMLT resistors according to OZHO.467.107TU.
* Selected during regulation.
Rice. 9.
Search element without casing
Rice. ten.
Amplifying block with the casing removed.
Rice. eleven.
Rear view of the amplifier block.
| Pos. designation |
Name | Qty. | Note |
| R1* | Resistor OMLT-0.25-82 Ohm±10% | 1 | 39; 56 ohm |
| R2 | 1 | ||
| R3 | Resistor OMLT-0.25-1kΩ ± 10% | 1 | |
| R4* | Resistor OMLT-0.25-39 Ohm±10% | 1 | 56;82 ohm |
| R5 | Resistor OMLT-0.25-4.7 kOhm ± 10% | 1 | |
| R6 | Resistor OMLT-0.25-1kOhm±10% | 1 | |
| R7* | Resistor OMLT-0.25-82 Ohm±10% | 1 | 39; 56 ohm |
| R8 | Resistor OMLT-0.25-39kOhm ± 10% | 1 | |
| R9 | Resistor 11SP-1-1-A-22kΩ ± 20% OS-5-32 OZH0.468.084 TU | 1 | |
| R10 | Resistor OMLT-0.25-39kΩ±10% | 1 | |
| R11 | Resistor OMLT-0.5-4.7MOhm±10% | 1 | |
| R12 | Resistor 11SP-1-1-A-100kΩ ± 20% OS-3-60 OZHO.468.084. THAT | 1 | |
| R13* | Resistor OMLT-0.5-4.7MΩ ± 10% | 1 | 1.5 MΩ |
| R14 | Resistor 11SP-1-1-A-47kΩ±20% OS-5-32 OZHO.463.084 TU | 1 | |
| R15 | Resistor PSP-1-1-A-47kΩ±20% OS-3-60 OZHO.463.084 TU | 1 | |
| R16 | Resistor OMLT-0.25-3kΩ ± 5% | 1 | |
| R17 | Resistor OMLT-0.25-6.2 kOhm ± 5% | 1 | |
| R18 | Resistor OMLT-0.25-240 Ohm±5% | 1 | |
| R19 | Resistor OMLT-0.25-5.6 kOhm ± 10% | 1 | |
| R20 | Resistor OMLT-0.25-2.2 kOhm ± 10% | 1 | |
| R21 | Resistor OMLT-0.25-4.3 kOhm ± 5% | 1 | |
| R22 | Resistor OMLT-0.25-10kΩ ± 10% | 1 | |
| R23* | Resistor OMLT-0.25-120 Ohm±10% | 1 | 270; 390 ohm |
| R24; R25 | Resistor OMLT-0.25-8.2 kOhm ± 10% | 2 | |
| R26 | Resistor OMLT-0.25-4.3 kOhm ± 5% | 1 | |
| R27* | Resistor OMLT-0.25-270 Ohm ± 10% | 1 | 100; 150; 390; 470 ohm |
| R28 | Resistor OMLT-0.25-2.7kΩ ± 10% | 1 | |
| R29 | Resistor OMLT-0.25-120 Ohm ± 10% | 1 | |
| C1* | 1 | Select. 0.25uF | |
| C2 | Capacitor KD-1-M75-5.1pF ±10%-3 OZHO.460.154 TU | 1 | |
| C3 | Capacitor KD-1-M700-27pF ± 10%-3 OZHO.460.154 TU | 1 | |
| C4 | Capacitor BM-2-200V-0.01 µF ± 10% OZHO.460.154 TU | 1 | |
| C5 | Capacitor K-53-4-6-22±30% OZHO.464.037 TU | 1 | |
| C6* | Capacitor BM-2-200V-4700pF ± 10% OZHO.462.047 TU | 1 | 3300;5100pF |
| C7* | 1 | 1000pF | |
| C8 | Condenser MBM-160-0.25-11 OZHO.462.032 TU | 1 | |
| C9* | Capacitor BM-2-200V 4700pF±10% OZHO.462.047 TU | 1 | 3300; 5100pF |
| C10* | Capacitor BM-2-300V-680pF ± 10% OZHO.462.047 TU | 1 | 1000pF |
| C11 | Capacitor MBM-160-0.25-11 OZHO.462.032 TU | 1 | |
| C12 | Capacitor BM-2-200V-3300pF ± 10% OZHO.462.047 TU | 1 | |
| C13 | Capacitor MB M-160-0.25-11 OZHO.462.032 TU | 1 | |
| C14 | Capacitor К53-4-15-15±30% О Zh0.464.037 TU | 1 | |
| L1 | RB5.764.014 Receiving coil | 1 | |
| L2 | RB5.689.013Sp Generator coil | 1 | |
| L3 | RB5.764.014 Receiving coil | 1 | |
| B | Element 373 GOST 12333-74 | 4 | |
| AT | Toggle switch TV2-1 USO.360.049 TU | 1 | |
| Gn1; Gn2 | RB7.746.005 Telephone socket | 2 | |
| T1; T2 | Transistor MP15 SBO.336.007TU1 | 2 | |
| T3...T5 | Transistor MP13B SBO.336.007TU1 | 3 | |
| Tp1 | RB5.731.097Sp Input transformer | 1 | |
| Tr2; Tr3 | RB5.731.098SP Matching transformer | 2 | |
| tf | Headphones TA-56M RL3.844.020Sp RLO.384.004 TU | 1 | |
| Ш1 | Insert ShR 20U5NSh 10 GEO.364.107 TU | 1 | |
| SH2 | Shoe ShR 20 P5 ESH 10 GEO.364.107 TU | 1 | |
| E1 | РБ7.773.001 Core | 1 | |
| E2 | Core MP-20-2 RM9x1.0x19 OZHO.707.115 TU | 1 |
Table with ratings of electronic components used in the IMP mine detector circuit
(sixties of the XX - beginning of the XXI century)
Mine detector IMP
The IMP mine detector is designed to detect, located in the ground, snow, under water and behind other obstacles made of non-magnetic materials, objects made of ferrous or non-ferrous metals or products containing metal objects in their composition. To be precise, this is not a mine detector, as such (that is, it does not look for the mines themselves as such), but a metal detector, or, as it is now fashionable to say (however, more correctly) - a metal detector. However, since almost all mines, to a greater or lesser extent, have metal products in their composition, this metal detector can rightfully be called a mine detector.
Mine detector IMP semiconductor induction type consists of: 1. A search element of a cylindrical shape with a connecting cable, a swivel assembly and a shortened rod;
2. Three extension rods with spring clips to secure the cable. Two rods have an internal thread for connection to each other, and one has a thread on one side only;
3. Amplifying block, which is also a container for power supplies;
4. Tarpaulin bag with a shoulder strap, designed to carry the amplifier unit and headphones (headphones);
5. Headphones;
6. Stacking box (transport packaging).
The search element is made of impact-resistant plastic and is a hermetically sealed cylinder, inside of which there is a generator and two receiving coils. The generator coil, receiving power from the amplifying unit, creates an alternating magnetic field, and two receiving coils, under the influence of this field, generate a signal. In the absence of metal objects in the magnetic field, the signals of both receiving coils are equal in magnitude and opposite in phase. The resulting signal is zero. Distortion magnetic field, due to the ingress of a metal object into it, causes a mismatch of the receiving coils and the signal becomes different from zero. depending on mass 
subject and the distance to it, the signal strength changes.
For the convenience of using the mine detector, a coupling collar with a screw and a ratchet is put on the search element. The lower end of the shortened rod is put on the screw. This allows you to adjust the position of the search element relative to the rod. In order to ensure exact definition places of a metal object, the middle of the search element has a slight thickening, which is usually painted white (optional). The signal in the headphones reaches its maximum when exactly this place is above the center of mass of the mine being searched for.
The search element is completely sealed and allows immersion in water to a depth of 10 meters (this is not taking into account the length of the cable, which in the IMP has a length of 1.8 m.).
In the picture on the left, the IMP mine detector is assembled to work in the prone position.
The amplifying unit is designed to accommodate batteries (four 
galvanic cell type "373" (Mars)), generating voltage for the generator coil, receiving and processing the signal, transmitting the signal to the headphones, turning the mine detector on and off, and setting the mine detector.
The mine detector is tuned by alternate rotation of the rack in order to achieve the disappearance of the sound signal in the headphones (i.e., the operation of the receiving coils is coordinated by rotating the rack). If it is not possible to achieve complete disappearance of the signal by rotating the ratchet, then by rotating the coarse adjustment screws with a screwdriver, the signal is weakened, after which the signal is completely eliminated by rotating the ratchet.
The reinforcing block is made of duralumin and sealed. The tightness provides protection against rain, dirt and short-term immersion in water. On the sides of the block there are usually hooks for attaching a cross-shoulder strap, which allows you to carry the block over your shoulder without a bag. Some series of blocks also have a hook on one of the sides, which allows you to attach the block to the sapper's waist (trouser) belt.
The canvas bag is designed to carry the amplifying unit while working with the mine detector and headphones (when the mine detector 
prepared for work, but the work itself is not yet done).
Extension rods provide the ability to assemble the mine detector to work standing or lying down. In the first case, all three rods are used, and in the second, only one (the final one).
Headphones are used to indicate the detected metal object. When in the zone 
there are no metal objects detected, then only a low, weak background tone (rustle) is heard in the headphones. When metal appears in the detection zone, a high tone (whistling) appears in the headphones, which intensifies as the search element approaches in the subject. The sound reaches its maximum when the center of the search element is above the center of mass of the mine, and as the search element moves away from the mine, the sound weakens. This allows you to determine the size of the object, its exact location and depth.
The transport box is designed to accommodate all the constituent parts of the mine detector (batteries in the amplifying unit) and carry the mine detector to the place of work. For this purpose, a suitcase-type handle is used. In addition, on one of the planes of the box there are hooks for fastening belts and straps, which allows you to carry the mine detector in the box behind your back like a satchel.
In the picture on the right, the IMP mine detector is assembled for standing work.
To use the mine detector you need:
- remove the components from the box, unscrew the rods for standing or lying work;
- fix the cable in the clamps of the rods and screw it to the connector of the amplifying unit;
- open the bottom cover of the amplifying unit and insert the batteries into it; close the lid;
- put on a canvas bag over your shoulder and put an amplifying unit into it;
- put headphones on your head and insert the headphone plug into the socket of the amplifying unit;
- turn on the toggle switch;
- by alternating rotation of the adjustment rack, ensure that only a faint rustle is heard in the headphones;
- bring the search element to a metal object and make sure that a whistle appears in the headphones, that the sensitivity of the search element is normal (the mine detector must detect its transport box from a distance of at least 40 cm, usually 50-70 cm); 
- search by holding the search element parallel to the ground at a height of 5-7 cm. from the surface; use the search element to describe an arc in front of you in a sector of 120-130 degrees from left to right or from right to left, then move forward by the length of the search element and describe the arc again; when a signal occurs, by moving the search element left-right-forward-backward, specify the location of the detected object and, by the strength of the signal, its duration at the time of movement, identify the object;
- periodically, when a weak steady whistle appears in the headphones, adjust the mine detector.
Tactical and technical characteristics of the IMP mine detector
To work underwater at depths up to 10-15 m, there is a diving version of the mine detector under the MIV brand. It differs from the basic model in that the adjustment racks are placed on the rod (only one rod is elongated), the amplifying unit is placed on the diver's chest under the suit, in the upper part of the rod there is a cuff for attaching the rod to the forearm right hand diver. Complete all set 11 kg, checked bottom area per hour 100-120 sq.m. The rest of the MIV does not differ from the IMP.
IMP mine detectors, according to the tables to the states, are supplied in engineering and sapper platoons of 9 kits, in other platoons of engineering troops, 3 kits each, in motorized rifle, tank companies, 3 kits each, in artillery batteries of artillery units, 3 kits each -that, in paratrooper companies, 1 to-that.
P.S. Last years on a number of forums there were quite a lot of caustic reviews about the qualities of the IMP and comparing it with the latest metal detectors. Naturally, not in favor of the IMP. Would you like to compare combat characteristics I-16 and Su-37 fighters. Or tanks BT-7 and T-90.
Every vegetable has its time. The IMP was created in the mid-sixties of the XX century and for almost 50 years could not but become outdated. In general, it's great that the IMP has not yet sunk into the section of forgotten weapons. That means they are still in use today. And that says a lot.
February 2013.
Sources
1. Semiconductor mine detector IMP. TO and IE. Customer Representative No. 359. 1969
2. B.V. Varanyshev et al. Military engineering training. Tutorial. Military Publishing. Moscow. 1982
3. US Army Field Manual FM 20-32. Mine/Contermine Operations. Headquarters, Department of the Army, Washington, DC, 30 June 1999. Change 8/22/2001. Appendix F.
Design
The kit is placed in a non-separable reusable wooden box with overall dimensions of 940x450x335 mm.
The mass of the set is not more than 50 kg.
Constructions constituent parts"KR-i" provide multiple use (at least 15 times) with the exception of cases of their destruction during detonation.
Warranty period of operation is 1 year from the date of commencement of operation within the warranty period of storage, set equal to 3 years.
The kit "KR-i" includes:
INDUCTION SEMICONDUCTOR MINO DETECTOR, IMP
TECHNICAL DESCRIPTION AND OPERATING INSTRUCTIONS
RB2. 471. 003 TO Rev. 2-65
PART I
TECHNICAL DESCRIPTION
PURPOSE
Semiconductor induction mine detector for individual use IMP is designed to search for anti-tank and anti-personnel mines installed in the ground (snow), the bodies or fuses of which are made of metal. The mine detector allows you to detect mines installed in the bush, grass and fords.
TECHNICAL DETAILS
1. Depth of detection by a mine detector of mines installed in the ground (snow), cm, not less than:
a) anti-tank mine TM-46 ...... 40
b) anti-tank mine TMD-B .......... 12
c) anti-personnel mine PMD-6 with a metal fuse MUV..................................8
2. The width of the mine search zone with a mine detector, cm:
a) for mines TM-46, not less ...... 30
b) for TMD-B mines ........ 20 ± 5
c) for mines PMD-6 ........ 20 ± 5
3. The mine detector allows you to search for mines in the water with the immersion of the search element to a depth, m. up to 1
4. Residual voltage level, mV, no more. . 80
5. Stable operation of the mine detector without adjustment, min., not less than 10
6. Distance between two working mine detectors, m, not less than .................... 7
7. Current sources-elements 373 GOST 12333-74 with a total voltage of 5.0 to 6.2 V, pcs. ... four
8. Duration of continuous operation with one set of current sources, h, not less than ....... 100
9. Operating temperature range, K from 243 to 323
10. The total mass of the mine detector, kg, no more ... 6.6
11. Weight of the search engine, kg, no more.... 2.4
8. COMPOSITION OF THE PRODUCT
The composition of the mine detector includes the following main elements and components:
1. Search element..........1 pc.
2. Amplifying block .......... 1 pc.
3. Rod (three knees) .......... 1 pc.
4. Headphones .......... 1 pc.
5. Bag............1 pc.
6. Stacking case..........1 pc.
7. Belt............1 pc.
8. Equivalent setting.........1 pc.
9. Screwdriver .............. 1 pc.
10. Grinding skin (10 cm2) ....... 1 pc.
11. Technical description and operating instructions. . 1 copy
12. Form ............... 1 copy:
Elements 373 GOST 12333-74 are not supplied by the factory.
4. DESIGN AND OPERATION OF THE PRODUCT
In the search element of the mine detector, two receiving and one generator coils are placed. The receiving coils are located in the electromagnetic field of the generator coil so that the total e. D; e., induced in them, is approximately equal to zero.
To compensate for the imbalance voltage of the receiving coils due to changes in temperature and the nature of the environment, a phase-amplitude compensator is used.
A change in the connection between the transmitter and receiver coils of the search element when metal objects are introduced into the field of the transmitter coil causes an unbalance signal, which is amplified by the amplifier and heard in telephones.
DEVICE OF COMPONENT PARTS OF THE PRODUCT
search element
The search element is a frame, in the grooves of which the generator and two receiving coils are installed. At one end of the frame there is a generator loop capacitor.
ATTENTION! Protect the search element from shock.
Search element frame fig. 2 is placed in casing 6, which protects it from mechanical damage. The casing consists of two parts glued in the middle and is closed with a union nut 3. A seal is installed under the union nut between the casing and the frame.
The threaded part of the union nut is coated with moisture-resistant grease.
The connection of the search element with the amplifying unit is carried out by cable 2 with the insertion of the ShR connector.
The search element is connected to the holder 4 by means of a clamp 5 enclosing the casing.
To eliminate the influence of the rod metal on the search element, the holder is made of textolite.
The location of the clamp on the casing is strictly fixed, which corresponds to the least influence of the metal parts of the rod on the operation of the search system.
ATTENTION! Install the frame of the search element into the casing with the mark towards the holder.
ATTENTION! Disassembly of the search element in the field is unacceptable.
5.2. Amplifying block
Reinforcing block fig. 3 consists of two parts: a dur-aluminum base 10 with a top cover 3 and a steel box 11 with a hinged bottom cover 15.
A board 16 is installed on the base, on which elements of the generator and amplifier, and potentiometers of the phase-amplitude compensator 9 are mounted, there is a compartment for current sources.
On the top cover 3 are placed:
Connector block ШР 20 for connecting the cable of the search element with the amplifying unit;
Cap 5, which is screwed onto the Shp 20 connector block when not in use and serves to protect the connector parts from damage, contamination and moisture ingress;
Telephone jacks 6, into which the plug of telephones is inserted during operation;
Toggle switch 7 for turning on and off current sources;
Two knobs 8 of the compensator, which serve to fine-tune the mine detector.
The axes of two coarse-tuning potentiometers of the phase-amplitude compensator 9 are brought out through the cover 3 under the slot.
The base is fixed to the box with the help of two screws 4. Carabiners 12 are installed on the side walls of the box, which serve to fasten the shoulder strap when working with a mine detector without a canvas bag.
The box has a hinged bottom cover 15 connected to it by means of a hinge and a lock 13. The bottom cover is intended for access to the current source compartment and for connecting 14 current sources to each other using a contact spring.
A rubber seal 2 is installed between the top cover and the base. A seal is also installed on the bottom cover. For ease of use, the amplifying unit is placed in a canvas bag.
5.3. Barbell
For ease of transportation and the possibility of the sapper working in the “lying” or “standing” position, the rod is collapsible and consists of three knees made of duralumin pipes.
5.4. Packing case
The stowage case is made of duralumin and is designed to accommodate all mine detector components during transportation and carrying. The lid is hinged to the case and closed with two tension locks. Brackets are installed inside the stacking case to secure the mine detector assemblies. The stowage case is adapted for carrying in hands and behind the back.
ORDER OF WORK WITH THE MINO DETECTOR
Holding the search element by the bar and continuously moving it in front of you to the right and left, move forward in a given direction. In this case, it is necessary to ensure that the search element moves parallel to the ground surface at a distance of 5 to 7 cm from it. When moving along the reconnaissance strip, the sapper must move the search element forward no more than half of its length, while it is necessary to carefully ensure that the entire area of the reconnaissance area is examined by the mine detector.
Having heard a signal on the phones (the appearance of a fundamental tone), the sapper must stop and clarify the location of the mine.
Depending on the task, he must either start removing the mine, or designate its location.
To determine the location of the mine, the search element must be carefully moved forward, where the appearance of the signal was recorded, until a minimum sound is received in the telephones. If, with a further slight movement of the search element forward or backward, the signal in the phones increases, then the mine is located under the center of the search element. If, when moving the search element forward, the signal in the phones does not increase, then it is necessary, by moving the search element back, to locate the mine using the same method.
The mine is located under the center of the search element only if, when moving it forward or backward, the signal in the phones increases.
As necessary, the mine detector should be adjusted, achieving the minimum volume of the main tone.
It should be remembered that the sensitivity of the mine detector is determined by the thoroughness of its settings.
In all other respects, strictly follow the requirements of the instructions for safety measures when clearing the area.
ATTENTION! Small metal masses (fuzes) can cause a weak signal, so when searching, the sapper must pay special attention to fixing these signals.
Features of the operation of the mine detector when searching fords
When clearing fords, the mine detector is assembled to work in a standing position.
The length of the strap of the bag with the reinforcement block must be adjusted so that the bag does not touch the water.
The assembled mine detector is adjusted in the usual manner on land, and then, when the search element is lowered into the water to a depth of 1 m, the mine detector is adjusted.
When setting up a mine detector in water, the search element must be removed from the ground at a distance of 10 to 20 cm.
ATTENTION! Before lowering the search element into the water, it is necessary to completely tighten the cap nut to prevent water from entering.
Army metal detector
Army metal detector
1. Cylindrical search element with a connecting cable, a swivel assembly and a shortened rod;
The search element is made of impact-resistant plastic and is a hermetically sealed cylinder, inside of which there is a generator and two receiving coils. The generator coil, receiving power from the amplifying unit, creates an alternating magnetic field, and two receiving coils, under the influence of this field, generate a signal. In the absence of metal objects in the magnetic field, the signals of both receiving coils are equal in magnitude and opposite in phase.
The resulting signal is zero. The distortion of the magnetic field, due to the ingress of a metal object into it, causes a mismatch in the receiving coils and the signal becomes non-zero. Depending on the mass of the object and the distance to it, the signal strength changes.
For the convenience of using the mine detector, a coupling collar with a screw and a ratchet is put on the search element. The lower end of the shortened rod is put on the screw. This allows you to adjust the position of the search element relative to the rod. In order to ensure accurate determination of the location of a metal object, the middle of the search element has a slight thickening, which is usually painted white (optional). The signal in the headphones reaches its maximum when exactly this place is above the center of mass of the mine being searched for.
The search element is completely sealed and allows immersion in water to a depth of 10 meters (this is not taking into account the length of the cable, which in the IMP has a length of 1.8 m.).
2. Three rods with special spring clips to secure the cable.
Extension rods provide the ability to assemble the mine detector to work standing or lying down. In the first case, all three rods are used, and in the second, only one (the final one).
3. Amplifying block, which is also a container for power supplies;
The amplifying unit is intended for placing batteries in it (four galvanic cells of the "373" (Mars) type), generating voltage for the generator coil, receiving and processing the signal, transmitting the signal to the headphones, turning the mine detector on and off, and setting the mine detector.
The mine detector is tuned by alternate rotation of the rack in order to achieve the disappearance of the sound signal in the headphones (i.e., the operation of the receiving coils is coordinated by rotating the rack). If it is not possible to achieve complete disappearance of the signal by rotating the ratchet, then by rotating the coarse adjustment screws with a screwdriver, the signal is weakened, after which the signal is completely eliminated by rotating the ratchet.
The reinforcing block is made of duralumin and sealed. The tightness provides protection against rain, dirt and short-term immersion in water. On the sides of the block there are usually hooks for fastening through the shoulder strap, which allows you to carry the block over your shoulder without a bag. Some series of blocks also have a hook on one of the sides, which allows you to attach the block to the waist (trouser) belt of the sapper
. 
Amplifying unit and container for power supplies Imp
4. Separate bag for carrying the amplifier unit and headphones
Headphones are used to indicate the detected metal object. When there are no metal objects in the detection zone, only a low, weak background tone (rustle) is heard in the headphones. When a metal appears in the detection zone in the head, as the search element approaches in the subject. The sound reaches its maximum when the center of the search element is above the center of mass of the mine, and as the search element moves away from the mine, the sound weakens. This allows you to determine the size of the object, its exact location and depth.
5. Headphones - Headphones
6. Packing - transport box
The transport box is designed to accommodate all the constituent parts of the mine detector (batteries in the amplifying unit) and carry the mine detector to the place of work. For this purpose, a suitcase-type handle is used. In addition, on one of the planes of the box there are hooks for fastening belts and straps, which allows you to carry the mine detector in the box behind your back like a satchel.
transport boxIMP
Assembling an army metal detector:
- we remove the IMP from the package, we connect the components;
- fix the cable in the clamps of the rods and attach it to the amplifying unit;
- We insert the batteries into the amplifying unit and the unit is fixed in a carrying bag
- connect the headphones to the amplifier unit.
- press the toggle switch to turn on;
Setting up the IMP:
The setting is carried out by alternating rotation of the rack, achieving only a slight rustle in the headphones, after testing we bring it to the search element - a metal object, a whistle appears in the headphones.
How the search was done using the TIM
- Holding the search element parallel to the ground at a height of 5-7cm. from the surface;
- with a search element, describe an arc in front of you in a sector of 120-130 degrees from left to right or from right to left,
- then move forward by the length of the search element and describe the arc again;
- when a signal occurs, by moving the search element left-right-forward-backward, specify the location of the detected object and, by the strength of the signal, its duration at the time of movement, identify the object;
Advantages of an army metal detector- this is simplicity use at work. Any soldier, after not much training, could handle the IPM. Reliability was also on top, it was necessary to do the full adjustment only once, because it is very simple and practically does not go astray, well, when changing batteries.
Significant cons of the IMP - the weight, when assembled, the mine detector weighs 6 kg, therefore, after working with it for 2-3 hours, the hands are tucked away and the operator-fighter leads the search element on the ground, while risking being blown up by a mine.
At the same time, the deep characteristics of the IMF at that time are very good, detection depth anti-tank mines of the M15 type - up to 40 cm, and anti-personnel mines of the M14 type - up to 8 cm. Also a plus it could be submerged in water up to 1-1.2 meters. For all that, he was very economical One set of batteries lasted more than 80 hours.
IMP is an obsolete model; in the late 80s, the IMP was decommissioned
TOPIC:Means of engineering reconnaissance and demining
TIME: 2 hours
LOCATION:__________________________________________
LEARNING OBJECTIVES:
1. To give an understanding of the means of engineering reconnaissance and demining
2. Teach personnel order of deployment and work with engineering reconnaissance means.
LEARNING QUESTIONS:
4. MMP mine detector. Purpose, performance characteristics, composition, procedure for working with a mine detector.
Lesson progress:
INTRODUCTION-5min
According to estimates, from 5 to 10 million mines are produced annually in the world. To date, approximately 110 million of them have been installed in 64 countries and remain in combat position. Up to 10 million mines have been installed in Afghanistan alone. About 2 million of them are installed on the territory of Bosnia, and taking into account the territory of Croatia and Serbia, this number increases to 3.7 million. According to the International Red Cross, in Mozambique, all major roads pose a danger to movement, since 2 million mines were planted on them during the 18-year civil war.
According to a UN report, 26,000 people are killed by mines worldwide every year and approximately the same number are injured. The victims are mostly civilians, up to half of whom are children.
Demining is a very slow and labor intensive process. The removal of an anti-personnel mine, which costs US$3 to produce, costs US$300-1000. During the year, no more than 200-300 thousand mines are removed all over the world, and more than a million new mines are re-installed. On average, every 5,000 mines are cleared, 1 sapper is killed and 2 are injured. Even assuming that no mines are laid, the cost of complete demining in all countries would be $33 billion and would take 500 years to complete at the current pace of work.
The experience of military operations in Afghanistan and Chechnya shows that the success of the tasks of searching for mines and land mines, as well as weapons depots, fully depends on whether there are specialists in the engineering troops unit who have studied the unmasking signs of search objects to the subtlety and skillfully use reconnaissance equipment. . So, for example, when supporting combat operations in the green zone of the province of Parvan in February 1984, the composition of the search group using the IMB finder discovered a warehouse with weapons and ammunition at a depth of 2 m. The warehouse was discovered by junior sergeant R. Kumurzin, who was fluent in this device. On the territory of Chechnya, as of September 05, 1996, the forces of units and subunits of the engineering troops completed the following volumes of tasks:
1. Scouted and demined:
- terrain - 54 thousand hectares,
- buildings and structures - 1060 thousand hectares,
including residential buildings - 317,
schools - 47,
hospitals - 32,
kindergartens - 10,
objects - 793,
lines of power lines - 780 km,
roads - 775 km.
2. In total, 470,000 explosive objects were discovered and destroyed. Including:
- engineering mines - 11600,
- artillery shells - 99200,
Mortar mines - 75400,
ATGM-1280,
Pomegranate - 86560,
Air bombs - 195,
Other VOP-195925.
I.MINO DETECTOR IMP. PURPOSE, performance characteristics, COMPOSITION, ORDER OF WORK - 25 min
Mine detector IMP.
Semiconductor induction mine detector (IMP) is used to search for metal objects in the ground.
Principle of operation
The search element contains two receiving coils and one transmitter coil. The generator coil radiates electromagnetic waves received by the receiving coils - the total EMF in them is zero. When metal objects are brought into the field, waves are reflected from them - an unbalance signal appears, which is heard in phones.
| Detection depth not less than (cm): - PTM PPM | ……………………80 ……………………...8 |
| Search width, zone (cm): - PTM PPM | …………………….30 …………………….20 |
| Power supply (E 373) (pcs) | ……………………4 |
| Time of continuous work (hour) | …………………100 |
| Search engine weight (kg) | ……………………2.4 |
| Mine detector weight (kg) | ……………………6.6 |
Rice. oneMine detector IMP.1-head phones; 2-amplifying block; 3-search element; 4-bar.
Operating procedure
1. Assemble a bar from aluminum knees;
2. Connect to the amplifying block of the headphone plug and the connecting cable of the search element;
3. Put on phones, while one of the shells should not cover the ear in order to listen to orders;
4. Move the toggle switch to the "ON" position and check the operability (squeak, setting the tone and sensitivity);
5. Continuously moving right and left in front of you, move forward, holding the element 5 - 7 centimeters from the ground.
As the signal increases, there is more metal.
Product PR - 507 is designed to search and detect metal and metal-containing objects in the ground, water and snow.
II.MINO DETECTOR IMP-2. PURPOSE, performance characteristics, COMPOSITION, ORDER OF WORK - 25 min
Mine detector IMP - 2
Main performance characteristics
| Detection depth in the ground, not more than (cm): type TM - 62M Type PMN - 2 | |
| Minimum distance between two mine detectors (m)... | |
| Power supply (8РЦ83) (pcs)…………………………………. | |
| Time of continuous operation (hour)………………………………... | |
| Weight of products in a packing case (kg)…………………….. |
Rice. 2.Mine detector IMP - 2.1-packing portable box; 2-prefabricated aluminum probe; 3-search element; 4-telescopic rod; 5-power supply; 6-block signal processing; 7-head phones.
Operating principle induction mine detector is based on fixing the secondary field of eddy currents that occur in metal objects under the influence of a primary pulsed electromagnetic field.
III.MINO DETECTOR MMP. PURPOSE, TTX, COMPOSITION, ORDER OF WORK - 20 min
MMP mine detector.
Main performance characteristics
| Depth of detection of mines (cm): - PTM in a metal case PTM in non-metal cases………………………………. PPM in cases of any material…………………………… | Up to 50 Up to 15 Up to 7 |
| Continuous operation time (hour)………………………………….. |
Multi-channel (radio wave, induction, combined) semiconductor portable mine detector is designed to search for anti-tank and anti-personnel mines in housings made of any metals and materials.
Rice.3. MMP mine detector:1-search element; 2-probe; 3-rod; 4-block signal processing; 5-head phones
The principle of operation of MMP is based on a combination of two methods:
1. Radio wave - sounding signals are emitted by transmitting antennas, reflected from the ground surface, received by receiving antennas and detected.
2. Induction - a reflected electromagnetic wave is captured with characteristics characteristic of Me (amplitude, phase).
Operating procedure
When reconnaissance of the area, the search element of the mine detector is moved with a sweep to the left - to the right parallel to the ground surface at a height of 10 centimeters at a speed of 0.6 - 0.9 m / s (2 - 3 km / h). After each stroke, the search element is moved forward 1/3 of its length. The appearance of a short signal indicates the presence of a foreign object.
IV.MINO DETECTOR RVM-2. PURPOSE, performance characteristics, COMPOSITION, ORDER OF WORK - 20 min
Mine detector RVM - 2.
Main performance characteristics
| Depth of mine detection (cm): - PTM………………. PPM……………… | to 10 up to 5 |
| Detection zone width (cm): - PTM……………… PPM……………… | up to 20 up to 15 |
| Mass of the mine detector (kg)………………………………... | |
| Mass of the search part (kg)…………………………….. | |
| Time of continuous operation (hour)………………………. | |
| Temperature Range applications (O C)…………… | +50 to -50 |
| Calculation (people)………………………………………………. |
The RVM-2 mine detector is designed to search for anti-tank and anti-personnel mines with hulls made of any materials.
Rice.4 . Mine detector RVM - 2:1-search element; 2-holder; 3-telescopic rod; 4-collet clamp; 5-block signal processing; 6-head phones.
The principle of operation is based on fixing the difference in the dielectric permittivity of explosives, the material of the mine body and the environment in which the mine is installed. Sounding signals are emitted by transmitting antennas, reflected from the ground surface, received by receiving antennas and detected. When moving the search element over the mine, a sound signal appears in the phones.
Preparation for work
1. Assemble the mine detector;
2. Connect headphones to the signal processing unit;
3. Insert power supplies;
4. Check functionality.
Operating procedure
The search for mines, depending on the state of the soil, is carried out in one of two search modes: I " or "P". Mode " I " is used to search for mines, in the snow, as well as under a layer of water, and the "P" mode in other cases.
Moving in a given direction, move the search element parallel to the ground at a height of 3-7 centimeters with smooth strokes, making sure that there are no unexplored areas left. When a signal appears on the phones, stop and check the location of the object
FINAL PART-5 min
I summarize the lessons, answer the questions posed, give a task for self-preparation.
Synopsis - Means of engineering reconnaissance and demining
Russia, 2000 - 7 p.
Discipline - Engineering training
Mine detector IMP. Purpose, performance characteristics, composition, procedure for working with a mine detector.
Mine detector IMP-2. Purpose, performance characteristics, composition, procedure for working with a mine detector.
MMP mine detector. Purpose, performance characteristics, composition, procedure for working with a mine detector.
MMP mine detector. Purpose, performance characteristics, composition, procedure for working with a mine detector.
