The main design elements of the mine detector are (Fig. 1): a search element 1 with a shortened rod knee; amplifying block 2; bar 3; phones 4; canvas bag 5; shipping package 6.

The search element (Fig. 2) is a cylindrical plastic case 1, inside which the generator and receiving coils are fixed on a rigid frame and mounted circuit diagram low frequency oscillation generator.

The search element is connected to the rod with the help of a clamp 2, covering the body of the search element, and a shortened knee of the rod 3 with a fork 4 pivotally rotating in the clamp of the clamp.

Rice. 1. Mine detector IMP:

1 - search element with a shortened rod knee; 2 - amplifying block 3 - rod; 4 - telephones; 5 - canvas bag; 6 - transport packaging

Rice. 2. Search element of the IMP mine detector:

1 - plastic case; 2 - clamp; 3 - shortened knee of the rod; 4 - articulated fork; 5 clamping screw; 6 - connecting cable; 7 - cable chip

The angle of inclination of the search element relative to the rod can be changed and is fixed with the clamping screw 5.

The connection of the search element to the amplifying unit is carried out using cable 6, ending with a chip 7 of the plug connector; The search element has a transverse stripe applied with white paint.

The amplifying unit (Fig. 3) has a metal case 2 with a hinged bottom cover 1, inside which on a rigid chassis 3 there is a board 4 with the electrical circuit of the amplifier, a compensator 5, and in a separate compartment 6 - power supplies 7 of the mine detector.

Rice. 3. Reinforcing unit of the IMP mine detector:

a - amplifying unit in the case, b - internal device; 1 - hinged cover; 2 - body; 3 - chassis; 4 - amplifier board; 5 - compensator; 6 - compartment for current sources; 7 - power supplies; 8 - toggle switch; 9 - axle box of the plug connector; 10 - axle box plug; 11 - sockets for turning on telephones; 12 - compensator handles; 13 - protective bracket

On the top panel of the amplifying unit are placed:

Toggle switch 8 for turning on the mine detector with the inscriptions "On", "Off";

Box 9 for connecting the cable from the search element; in transport position the box is closed with a screw-on figured plug 10;

Jacks 11 for switching on telephones, marked "T", "+", and "-";

Two knobs 12 for setting the mine detector (knobs of compensators), protected by a bracket 13.

On the side (narrow) walls of the case there are rings for attaching the unit to the shoulder strap.

Four 1.6-FMTs-U-3.2 elements connected in series are used as current sources in the mine detector.

The mine detector rod consists of a shortened knee, placed on the search element, and three separate tubular knees screwed together. There are spring clips on the rod for fastening the cable connecting the search element with the amplifying unit.

In one knee of the rod, which has a knurled plug, there is a screwdriver.

TA-4 telephones with a rigid adjustable headband, rubber plugs and a cable ending with a plug serve as an indicator of a signal about the detection of a mine.

A canvas bag is used for laying and carrying the amplifying unit during the search. The bag is equipped with a shoulder strap and belt loops.

The transport packaging, adapted for carrying in the hands or in the “behind the back” position, is intended for laying and transporting all elements of the mine detector.

On the body of the package there is a handle and locks for attaching shoulder straps. Inside the metal case are holders designed to fix the position individual elements mine detector.

The electrical circuit of the mine detector IMP

The basis of the electrical circuit of the mine detector (Fig. 4) is: a low-frequency voltage generator; compensator; low frequency resonant amplifier.

The low-frequency voltage generator is made according to a push-pull circuit on two P13B semiconductor triodes (3 and 5). The oscillatory circuit of the generator is made up of the inductance of the generator coil 6 of the search device and the constant capacitor 7. Resistances 1 and 4 determine the mode of operation of the generator in direct current.

The compensator, designed to adjust the mine detector, is assembled according to the double bridge circuit, consisting of two variable resistances 14 and 15, a constant resistance 12 and a constant capacitor 13. Compensation for the voltage supplied to the input of the amplifier from the receiving coils is carried out due to the voltage removed through the compensator from a low frequency voltage generator. This voltage can be adjusted by changing the value of variable resistances 14 and 15 included in the bridge arms.

The resonant amplifier is assembled on three P13B semiconductor triodes (31, 32 and 33).

Rice. 4. Schematic diagram of the IMP mine detector:

1 - resistance ULM-0.120-5.7 com; 2, 8 - receiving coils; 3, 5, 31, 32, 33 - planar germanium triodes P13B; 4 - resistance ULM-0.120 - 680 ohm; 6 - generator coil; 7 - capacitor MBM-150-1 microfarad: 9, 10 - capacitors EM-10-15 microfarad; 11 - resistance VS-0.25-30 ohm; 12 - resistance MLT-0.5-4.7 Mohm; 13 - capacitor KDM-27 pf; 14 - resistance SP-47 com; 15 - resistance SP-22 com; 16 - toggle switch; 17, 18, 39, 42, 44, 47, 49 - capacitors EM-25 microfarad; 19, 20 - resistance MLT-0.5-1.5 com; 21 - resistance MLT-0.5-200 ohm; 22, 38, 48 - resistance MLT-0.5-1.8 com; 23, 25 - matching transformers; 24, 40, 45, 50 - MLT-0.5-3.3 com; 26 - resistance MLT-0.5-4.7 com; 27, 28, 29 - capacitors 6M2-4700 pf; 30 - telephone sockets; 34 - input transformer; 35 - capacitor MBM-150-0.5 microfarad; 36, 51 capacitors BM-2-3300 pf; 37 - capacitor BM-2-0.01 microfarad; 41 - capacitor BM-2-1000 pf; 43 - resistance MLT-0.5-820 ohm; 46 - capacitor BM-2-680 pf; T - phone; B - batteries; ШР - plug connector

The voltage from the receiving coils of the search device is supplied to the first stage of the amplifier through the input transformer 34. The resonant circuit of the first stage, tuned to the frequency of the generator, consists of the inductance of the matching transformer 23 and a constant capacitor 27.

The second stage of the amplifier is assembled according to a scheme similar to that of the first stage. The resonant circuit of the second stage consists of the inductance of the matching transformer 25 and the constant capacitor 28.

Constant resistances 22, 38 and 40 of the first stage, 24, 43 and 45 of the second and 26, 48 and 50 of the third stages stabilize the operation of the amplifier with possible temperature fluctuations environment. Electrolytic capacitors 39 and 44 serve to decouple AC and DC circuits. Capacitors 41 and 46 block triodes 31 and 32 at high frequency.

The voltage from the receiving coils, amplified by the first and second stages, is fed to the third, output stage, the load in which is the resonant circuit, consisting of the inductance of the coils of TL-4 telephones and a capacitor of constant capacitance 29.

Capacitors 17, 18, 42 and 47, as well as resistances 19 and 20, are used to isolate AC circuits and reduce the gain of the amplifier in order to prevent its self-excitation. Resistances 11, 21 and capacitors 9 and 10 serve to eliminate the connection between the generator and the amplifier through current sources.

When the current sources are turned on, the low-frequency voltage generated by the generator is supplied to the generator coil 6 of the search device. Alternating current, flowing through the winding, creates an electromagnetic field around the generator coil, due to which an alternating electromotive force (EMF) is induced in the receiving coils. The windings of the receiving coils are connected to each other so that the EMF induced in them is directed towards. Since the electrical characteristics of the receiving coils cannot be practically the same, additional equalization of the EMF induced in them is carried out using a compensator.

In the absence of metal (mines) under the search device, the magnitude of the differential EMF of the receiving coils is close to zero and no signal is received at the amplifier input.

When a metal (mine) gets under the search element, the electromagnetic field of the generator coil is distorted, and therefore its inductive connection with the receiving coils changes. This leads to the fact that the magnitude of the differential EMF of the receiving coils increases significantly. The differential EMF from the receiving coils is fed to the input of the amplifier, amplified by it and listened to by the operator in the phones in the form of a noticeable increase in sound volume at a constant frequency.

Preparing the mine detector for work

Installation of power sources

To install power sources, you must:

Open the cover of the transport package and remove the amplifying unit from the package;

Check the elements 1.6-FMTs-U-3.2 in terms of shelf life and compliance with the season of work; for installation in a mine detector, elements are suitable, from the date of release of which no more than 10 months have passed;

With a knife, clean their contacts and bottom part to a metallic sheen;

Open the bottom hinged cover of the block body and install the prepared elements into the power compartment in accordance with the diagram shown on the bottom wall of the block chassis: two elements are sequentially placed in the right half of the power compartment with the cap down, in the left half - with the cap up;

Close the lid of the amplifying unit, place the unit in the transport package and close the lid of the package.

Assembling a mine detector for working in a standing position

Remove the phones from the packaging and put them on your ears;

Take out the canvas bag and amplifying block, place the block in the bag and put the bag on the shoulder;

Remove the rod knees from the package and screw them together;

Remove the search element, close the cover of the transport package, articulate the rod with a shortened elbow on the search element;

Choose the angle between the search element and the rod so that when searching, the search element moves parallel to the ground surface; fix the position of the search element with a clamping screw;

Lay the cable from the search element into the spring clips on the rod;

Unscrew the figured plug of the axle box on the amplifying block, align the slot on the chip with the protrusion on the axle box and attach the chip to the axle box; fully tighten the cap nut of the connector;

Connect the phone plug to the sockets on the panel of the amplifying unit;

Turn the mine detector on toggle switch to the “On” position.

At the same time, the sound of a constant top should appear in the phones.

A view of the mine detector, assembled for work in the "standing" position, is shown in fig. 5.

Rice. 5. Mine detector IMP, prepared for work in the "standing" position

Assembling a mine detector for work in the "lying" position

To assemble a mine detector you need:

Open the cover of the transport package;

Take out of the package and put the phones on your ears;

Remove the canvas bag and amplifying unit, put the amplifying unit into the bag;

Fasten the canvas bag on the right side with the waist and shoulder straps so that it does not restrict movement when crawling;

Remove the search element from the package;

Expand (by approximately 180°) the shortened rod elbow so that its longitudinal axis is parallel to the axis of the search element; fix the position of the shortened knee with a clamping screw;

Articulate with the shortened knee the upper knee of the rod (the knee with a plug and knurling at the end);

Fix the cable from the search device in the spring clip on the rod;

Connect the cable chip from the search element to the bushing on the amplifying block, for which unscrew the curly plug, align the slot on the chip with the protrusion on the bushing, insert the chip into the bushing and tighten the union nut of the connector until it stops;

Connect the phone plug to the sockets on the top panel of the amplifying unit so that the wire from the plug to the phones runs behind your back;

Turn the mine detector on toggle switch to the “On” position. In this case, the phones should have a sound of a constant tone;

A view of the mine detector, assembled for work in the "lying" position, is shown in fig. 6.

Rice. 6. Mine detector IMP, prepared for work in the "lying" position

Setting up the mine detector

When setting up, the search element of the mine detector is located at a distance of 10-20 cm from the ground surface so that there are no foreign metal objects in the zone with a radius of 1-1.5 m from it, and adjacent working mine detectors are located no closer than 6 m.

By rotating both knobs of the compensator in turn (in any sequence), they achieve a gradual decrease in the volume of the control tone heard in the phones, and then its complete disappearance. At the same time, only a weak sound of a higher frequency than the main control tone should be heard in the phones.

Checking the correctness of the setting is carried out by approaching the search element to a metal object (screwdriver, knife). If at the same time the phone produces the sound of the main tone with an increased volume, the mine detector is set up correctly.

If, when the search element is brought to a small metal object, the sound in the phones first weakens, and then its volume begins to increase, the mine detector is set incorrectly. In this case, you need to reconfigure the mine detector.

In the event that by rotating both knobs of the compensator in turn it is not possible to achieve the disappearance of the main tone heard in the phones, it is necessary:

Loosen the screws securing the compensator handles on the axles with a screwdriver;

Rotate the axis of the compensator handles alternately with a screwdriver until the main tone disappears in the phones;

Fix the compensator handles on the axles with screws;

Further adjustment of the mine detector is carried out by alternate rotation of the compensator.

Having finished setting the mine detector, it is necessary to re-check and make sure it is correct.

When setting up a mine detector, it must be remembered that its sensitivity is determined by the thoroughness of the setting. Therefore, when setting up, you should achieve the lowest volume of the control tone in phones.

The use of a mine detector

When searching for mines, the sapper, moving in a given direction, continuously moves the search part of the mine detector in front of him to the right and left above the ground so that the search element is located parallel to the ground surface at a height of 5-7 cm (Fig. 7 and 8).

The width of the terrain strip, checked during one run, is:

when working in a standing position 1.7 m;
when working in the "lying" position up to 1 m.

Rice. 7. Search for mines using the IMP mine detector in the "standing" position

Rice. 8. Search for mines using the IMP mine detector in the "lying" position

After several movements of the search element to the right to the left over the surveyed area, the sapper moves forward at a distance of no more than 30 cm.

Having fixed a change in the control tone in the phones, the sapper must stop and clarify the location and nature of the detected object.

To clarify the location of the object, it is necessary to move the search element over the area where the greatest change in the volume of the control tone was recorded, forward (in the direction of movement during the search). If, with such a movement, the sound volume in the phones will first gradually decrease, and then, after passing through a minimum, it will begin to increase again, then at the moment of the lowest sound volume in the phones, the desired object will be in the ground exactly under the white strip applied to the body of the search element.

If, when moving forward, the transition of the signal through the minimum is not detected, it is necessary to move the search element in the same place back and, as mentioned above, find the exact position of the desired object in the ground.

Having specified the location of the detected object, it is necessary to determine which object was detected using a probe. If the detected object turns out to be a mine, then, depending on the task, the sapper either neutralizes and removes it, or marks it with a special sign.

If it is determined that the signal was caused by a non-explosive metal object, the sapper continues the search, moving in the given direction.

During the search, the sapper must periodically check the setting and adjust the mine detector.

Upon completion of work on the search for mines, it is necessary:

Disconnect the cable chip of the search element from the axle box on the amplifying block, screw the curly plug onto the axle box;

Remove dust (dirt) and wipe dry the rod and search element;

Open the cover of the transport package;

Unscrew the rod elbows one by one, while releasing the cable from the clamps, and place them in the transport package;

Loosen the clamping screw and turn the shortened rod knee so that it rests against the body of the search element; put the search element in the package;

Remove the canvas bag from the shoulder, remove the amplifying unit from it and place it in the package;

Put a canvas bag in the package;

Remove the headphones, wrap the cable around the headband and place the phones in the package over the canvas bag;

Close the lid of the transport package.

It is necessary to lay all the elements of the mine detector only in the places provided for them.

Possible malfunctions mine detector and ways to eliminate them, see table. one.

In the presence of other malfunctions, mine detectors should be sent for repair to the workshop.

Mine detector kit, see table. 2.

Table 1. Possible malfunctions of the mine detector and ways to eliminate them

Typical symptoms of a malfunction	Cause of malfunction	Troubleshooting
1. Rustles and cods are heard in phones	1a. Bad contacts at the connection points of current sources 1b. Bad contact in the plug	1a. Check the connection points of the elements and clean the contacts 1b. Check and clean the plug contacts
2. When the toggle switch is turned on, the mine detector does not work (there is no sound in phones)	2a. Power supplies not turned on correctly 2b. Exhausted power supplies 2c. Break in the wire or coils of telephones 2y. Break in the windings of the amplifier transformers	2a. Check that the power supplies are turned on correctly Turn them on according to the scheme 2b. Replace power supplies with fresh ones 2c. Replace phones with working ones 2y. Open the amplifier. Check the integrity of the transformer windings with an ohmmeter. If the windings are broken, replace the transformer. If a break occurred at the place where the wires were soldered, solder
3. When tapping on the amplifying unit, the sound in the phones is interrupted	3. Bad contacts at the soldering points of the amplifier circuit and axle box	3. Check the condition of the rations of the amplifier and axle box. Solder faulty solder joints
4. When turning the knobs of the amplifying unit, it is not possible to achieve a decrease in the volume of the fundamental tone in phones	4a. Open in the chain of receiving coils of the search device 4b. Contact failure in the plug 4c. Violation of the contact of variable resistances with the elements of the circuit of the amplifying unit	4a. Remove the casing of the search element and check the soldering points of the receiving coils to the cable wires 4b. Disassemble the plug connector, check and eliminate the fault in the contacts 4c. Remove the casing of the amplifying unit and check the condition of the contacts. In case of contact failure, carefully solder the connection points with the elements of the amplifier circuit

Table 2. Mine detector kit

no.	Name of items	unit of measurement	Quantity
1	Search element with a shortened rod knee	PCS.	1
2	Amplifying block	PCS.	1
3	Collapsible bar of three knees	PCS.	1
4	Headphones TA-4 with a rigid headband and rubber plugs	PCS.	1
5	Canvas bag with shoulder strap	PCS.	1
6	Metal transport packaging with two shoulder straps	PCS.	1
Spare parts and accessories
7	Screwdriver	PCS.	1
8	Elements 1,6-FMTs-U-3,2	PCS.	4
Documentation
9	Operation manual for the IMP mine detector	PCS.	1
10	Form	PCS.	1

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

Induction mine detector semiconductor 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.

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 weight 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 instruction manual. . 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 designed for access to the power 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 a sapper working in the “lying” or “standing” position, the rod is collapsible and consists of three knees made of duralumin pipes.

5.4. Case laying

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 attention Special attention to detect 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.

(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 alternating 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 (there is only one elongated rod), 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 house. 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.

The latest mine detectors, a multifunctional knife, a modernized demining kit, and simply a sapper suit, all this was seen by Defend Russia correspondents at the anniversary of the Research Testing Institute of Engineering Troops. New developments are just beginning to enter the troops, and we can tell you about them right now.

October 6 Central Research and Testing Institute of Engineering Troops of the Ministry of Defense Russian Federation celebrated its 95th anniversary. Over the years of its existence, the institute has created thousands of unique engineering weapons. At the anniversary, the guests were shown the latest developments. Here is some of them.

Each set includes: 6 suits-protective sets of the Sokol sapper, 6 protective helmets LSHZ-2DTM. Each suit has two transport bags and two sets of thermal underwear - summer and winter. Each costume also comes with a Swipe-3 combat knife and a flashlight.

The new set is unique. Similar elements are found, but there are no kits in the same assembly.

Combined-arms demining kit OVR-2. Photo: Andrey Luft/Defend Russia

The suit is much lighter than its predecessor and weighs about eight kg. This significantly increases the duration of the work of sappers. Titanium protective panels have been replaced with extruded polyethylene, which also reduces the weight of the suit. In addition, the protection of the collar zone and vital organs has been strengthened.

This set retains protective properties when hit from 5 meters with a PM pistol and a TT pistol (bullet 5.45, bullet 7.62).

The cost of the kit is quite low for such equipment and is about 1 million rubles.

Since the beginning of this year, the kit has been actively used by engineering troops during the continuous demining of the area on the territory of the Chechen Republic.

The device is designed to search for wired control lines for explosive devices. The portable finder is capable of detecting a 20-meter SPP-2 type wire at a distance of 4 meters from either end and at a depth of 30 centimeters in the ground.

It consists of an electronics unit with remote control of the indication, a carrier frame of three telescopic rods, a generator coil and a receiving coil. Manufactured using modern composite materials, modern electronic base. The portable finder can be easily folded and placed in a transport case.

There is nothing complicated in working with the device. When turned on, the device is immediately ready to work - to search. The presence of a wire or a wired line is indicated by an LED scale.

This is a completely domestic development. The portable finder was created with the participation of specialists from the department engineering intelligence institute. The price of the device is comparable to the prices of foreign analogues and is about three hundred thousand rubles.

The portable finder was accepted for supply in 2013 and has already proven itself with positive side. The device was used in the preparation and conduction Olympic Games in Sochi.

Portable finder of wired lines for controlling explosive devices PIPL. Photo: Andrey Luft/Defend Russia

Designed to replace the current IMP mine detectors in service today. The device is designed to detect anti-personnel and anti-tank mines, the body, fuses and parts of which are made of metal.

Currently, mine detectors are routinely purchased and delivered to the subdivisions.

The IMP-S2 portable mine detector is made using modern materials and a modern radio-electronic base. The use of plastic helped to significantly reduce the weight of the device.

Portable induction selective mine detector IMP-S2. Photo: Andrey Luft/Defend Russia

Portable detector of non-contact explosive devices INVU-3 M

Designed for remote detection of mine-explosive devices with electronic fuses - radio-electronic components, circuits and transistors. The antenna unit and the radar unit with the control panel are located in front, in the hands of the sapper. To reduce the mass of that part of the mine detector, which is in the hands of the military, the electronics unit and the battery are placed on the back of the sapper.

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 designed to accommodate batteries (four galvanic cells of the "373" (Mars) type), generate voltage for the generator coil, receive and process the signal, transmit the signal to the headphones, turn the mine detector on and off, and configure the mine detector.
The mine detector is tuned by alternating 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 adjustment 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 5-7 cm. 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