(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 a magnetic field metal objects 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 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 accurate determination of the location of a metal object, the middle of the search element has a slight thickening, which is usually painted in White color(not necessary). 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 set up by alternate rotation of the rack in order to achieve disappearance in the headphones sound signal(i.e., by rotating the rack, the operation of the receiving coils is coordinated). 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 tuning 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 fixing the rod on the forearm of the diver's right hand. 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 induction semiconductor metal detector "IMP" is designed to detect objects made of ferrous and non-ferrous metals. The metal detector allows you to detect these objects in liquid, loose, semi-liquid media, in soil, wood, snow, etc. The depth of search for objects in liquid media (when the metal detector is immersed) is up to 1 m. In soil or other dense media, large metal objects are detected on depth up to 40 cm from the surface.

The metal detector kit includes:

search element with a shortened rod knee;

a bar consisting of three knees screwed together;

generator-amplifying unit;

head phones;

transport packaging.

The search element of the metal detector consists of two receiving coils located at the ends of a moisture-proof plastic casing, and a generator coil placed between them. It receives alternating current from a generator located in the case of the amplifier unit.

The receiving coils are connected in such a way that the total electromotive force induced in them under the influence of the electromagnetic field of the generator coil is approximately equal to zero. Full balancing of this EMF is carried out by a phase-amplitude compensator using coarse and fine adjustment knobs, which are located on the top panel of the amplifier unit.

The amplifier unit is mounted on a duralumin frame. This frame also contains a generator and a phase-amplitude compensator. The frame itself is in a steel case with a hinged lid. A special compartment of the case is designed for power sources - four elements 373, which ensure continuous operation of the device for 80 hours at an air temperature of minus 30° to plus 50°C. On the housing cover there is a contact spring for serial connection of power supplies and a plate with a diagram of the installation of power supplies.

On the panel of the amplifier block, in addition to the compensator knobs, there are:

power switch;

connector for connecting the cable of the search element;

phone sockets.

The inoperative connector is protected by a special cap. The total weight of the metal detector is 7.2 kg, the weight of the search part is 2.5 kg.

To work with a metal detector, you need to assemble and configure the devices, and then search.

After work, the device is disassembled, wiped and packed.

The metal detector can be assembled to work in two positions: standing and lying down. To work in a standing position, a metal detector is assembled in cases where it is necessary to search on the ground or in large rooms. In these cases, all three knees of the bar are used. When working in difficult conditions (for example, in rooms with very low ceilings, in attics, etc.), the two middle knees of the rod are not used, the rolled elements of the rod are installed parallel to the search element, and the canvas bag with the generator-amplifying unit is fixed on the waist belt. This assembly of the device ensures its use in the prone position.

During assembly, the cable of the search element is connected to the generator-amplifying unit, the phone plug is connected to the socket.

For all types of metal detector assembly and its maintenance, it is strictly forbidden to unscrew the union nut on the search element and open the top cover of the amplifier unit.

After assembling the metal detector, the power is turned on and the device is configured.

When a metal object enters the zone of action of one of the receiving coils, the emf induced in them is unbalanced. The resulting differential EMF enters the amplifier and from it the signal enters the telephones. The signal is amplified when the receiving coil approaches a metal object. Taking this into account, the device is tuned when the search element is removed at least 1.5 m from metal objects. The device is tuned by rotating the knobs of the compensator of the amplifying unit until the main tone signal disappears in the phones. If after that, when the search element is brought to a metal object, the main tone signal appears in the phones, then the device is configured for searching. The metal detector works stably for 10-20 minutes, after which the device is adjusted. The sensitivity of a metal detector depends on how carefully it is set up.

1. Before conducting a search, it is advisable to inspect the area under investigation, remove visible foreign metal objects (if necessary, for example, in order to maintain secrecy, these objects return to their original place after the search is completed).

2. For the purpose of consistency and completeness of the search, the surveyed area must be divided into conditional squares or strips in such a way that their boundaries, when examined by a metal detector, completely overlap both in the longitudinal and transverse directions.

3. The search element during operation should be kept at a distance of no more than 5 cm from the surface being examined and parallel to it, moving forward gradually, with each step no more than half the length of the search element, and moving it in one direction or another (to the right, to the left).

4. Having heard a tone, you need to stop and clarify the location of the metal object by moving the search element to the right and left - until the strongest signal appears in the headphones, back and forth - until a slight signal interruption appears. In this case, the metal object will be under the middle part of the search element.

5. During the search, the areas where the presence of metal was recorded should be noted so that after examining the entire area, the issue of finding the desired object can be resolved. When determining the sequence of verification and opening of these areas, it is necessary to take into account such external signs such as subsidence, removed sod, freshly dug hole, soil marks on grass, etc.

6. After removing the object, its location is additionally examined by a metal detector.

7. When using two metal detectors during the search, the distance between them must be at least 6 meters. This is necessary to exclude the mutual influence of the magnetic fields of the devices.

After the end of the search, the metal detector is cleaned of dirt, wiped and placed in a package. When storing the device for a long time, it is necessary to remove the power sources from the amplifier unit.

Portable metal detector Gamma VM-20 N

The portable metal detector Gamma VM-20 N (Fig. 44) is designed to search for objects made of ferrous and non-ferrous metals in various caches and hard-to-reach places.

Rice. 44.Search device "Gamma VM-20N"

The Gamma instrument is very sensitive. A metal object the size of a three-kopeck coin is detected by it from a distance of 7 cm. From 15-20 cm, the device detects objects such as a knife, pistol, etc.

The device includes:

eddy current transducer;

a high frequency generator;

amplitude detector;

an amplifier with a threshold device;

· the generator of oscillations of sound frequency with the loudspeaker;

· electronic key;

· source of power.

All components of the device are mounted in a plastic case, convenient to hold in your hand. An inductive search element is located under the cylindrical head of the housing. On the side wall is a switch. An audible signaling device is mounted under the rear top cover, next to it is a tuning knob. The power compartment is located under a sliding cover at the bottom of the case.

The power source is an element of the "Krona" type with a voltage of 9 volts. When working in conditions low temperatures(up to -20°C), the power supply is placed in a special case, which in this case is located under the operator's clothing. One battery "Krona VTS" provides 8 hours of continuous operation of the metal detector.

The sound signal of the device about the presence of a metal object in the search area is heard at a distance of 1.5 m.

Before starting work, you need to make sure that the device is working, install the power source and make settings. The instrument is set up in the following order.

Take the device to right hand search element down, and the loudspeaker (hole on the body) - up. Turn on the device by setting the switch to the "ON" position, and the setting knob to the extreme position. After turning on the device, a sound signal should appear, which after 5-10 seconds. disappears.

Turn the tuning knob counterclockwise to achieve a stable sound signal. By gently turning the setting knob in reverse direction to achieve an intermittent sound signal, and with further rotation - and the disappearance of the sound. The position of the tuning knob, when a slight counterclockwise rotation causes an intermittent sound signal, and the reverse disappearance of the sound, indicates the correct setting of the device. The smaller the rotation of the knob when switching from silent mode to intermittent sound signaling mode, the more accurate the device setting, the greater its sensitivity, i.e., the ability to detect the same objects at a greater distance. To check the readiness of the device, you need to bring the search element (search head) to any metal object; a continuous signal that appears indicates the readiness of the metal detector to search.

If an intermittent sound signal occurs when the search element is brought to a non-metallic surface, for example, to the palm of your hand, you need to slightly turn the tuning knob clockwise, that is, reduce the sensitivity of the device.

When setting up the device, it should be taken into account that a sound signal may also appear when a metal object approaches the “rear” side of the metal detector, if there is a watch or other metal objects on the operator’s hand.

The efficiency of using the device largely depends on some circumstances that must be taken into account when performing a search:

1. Due to the fact that large metal objects affect the magnetic field of the search element, preventing the normal operation of the device, they must, if possible, be removed from the search area.

2. To be sure of the reliability and completeness of the search, it should be carried out sequentially, in accordance with the previously marked areas (squares) of the surface being examined. In this case, the width of the strip checked in one pass by a metal detector should not exceed 7 cm.

3. It is necessary to move the device as close as possible to the surface under study, this ensures the maximum search depth.

4. Max speed scanning (carrying the device over the surface under study) should not exceed 50 cm/sec. When scanning at a higher speed, the sound signal does not have time to form and is not captured by the operator.

5. In order to avoid a false signal, when working with the device, do not allow sudden movements or impacts of the metal detector on hard objects.

6. In the process of continuous work with a metal detector, it is necessary to periodically (at least once every two hours) check the correct settings of the device. To do this, it is enough to bring the device closer with a search element to any small metal object (watch, ring). If at the same time the distance at which the alarm is triggered is less than 7 cm, the device requires adjustment.

7. If there are hidden metal objects such as reinforcement of reinforced concrete structures, pipelines, electrical wiring, metal parts of windows, etc., causing the appearance of a “false” signal, it is necessary to first establish their exact location using the device, and then examine adjacent areas surfaces.

8. Using the device, Special attention you should pay attention to such signs as separate sections of the walls with re-pasted wallpaper, traces of additional or fresh painting, surface irregularities, etc. Before opening these places, it is recommended to check them with punctures or by drilling. Opening of possible caches is carried out with precautions against damage to the items or packaging contained in them.

When conducting a personal search, those areas of the human body are taken into account, which are most likely to be used to cover metal objects.

Before starting a personal examination, they are offered to put their feet shoulder-width apart, spread their arms to the sides. The search is carried out by passing the metal detector over the surface of the body (clothing) at a distance of 2-3 cm at a speed of not more than 50 cm/sec. So the passage from one shoulder to the other is carried out in about 1 second.

When a sound signal occurs, the location of the metal object must be clarified by reducing the scanning speed and narrowing the control zone to the minimum size. You can judge the mass of the detected metal by moving the device away from the surface being inspected. So, if the cause of the signal was a small item of clothing, for example, a button, then a slight distance of the metal detector will lead to the disappearance of the signal. If there is a significant mass of metal in this area (knife, pistol), the signal is preserved.

In some cases, the method of comparing the reaction of a metal detector when examining symmetrical areas of the body helps to establish the cause of the signal. So, if when scanning near the left leg, the alarm is triggered, and near right leg there is no signal, it can be assumed that there is a hidden metal object on the left leg.

When conducting a search, it is necessary to visually identify suspicious elements of clothing (for example, thickened seams, items of clothing that are unusual in shape and size) and examine them with particular care.

After removing the metal object from the area under study, it is necessary to re-inspect the fixed place.

When examining various bundles, packages, examining individual items of clothing, it should be borne in mind that the device fixes metal objects placed to a depth not exceeding maximum range detection depending on the total mass of these objects.

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

Portable induction mine detector IMP-2 is designed to search in soil of different moisture content, in snow and water for anti-tank and anti-personnel mines, other explosive objects with metal or plastic cases and containing metal parts. The mine detector can be used in various environments in peaceful and war time for reconnaissance of minefields, making passages in them and continuous demining of the area. In addition, if necessary, the IMP-2 can be used to search for other metal objects.

Compound:

The IMP-2 mine detector consists of:

Search element (rectangular shape in the form of a frame with 2 gaps)

Prefabricated three-knee bar

Amplifying block

Head phones

Assembly probe

Signal processing unit with connection cables (on/off toggle switch, sensitivity adjustment knob, male connector, cable connector.)

External power supply (connects to telescopic rods)

Carrying bags, for external power supply, soft case

Depth of detection depending on the size of the search object:

PTM - 50 cm

zone width:

detection area:

standing – 300 m2/h

lying down - 150 m2/h

lane width - up to 2 m (in reality - 1.7 m)

Total weight in working condition - no more than 2 kg.

in the package -8 kg

Power is supplied autonomously from batteries built into the device or accumulators of the R6 type (element 343 - 6 pieces) with a total voltage of 9 V.

The metal detector remains operational at temperatures environment from -50 C to +50 C.

The order of preparation for work.

Deploy the IMP-2 mine detector. Set the POWER toggle switch to the OFF position, the regulator knob to the left position (minimum sensitivity). Keep the mine detector sensor no closer than 0.5 m from the ground and no closer than 1 m from metal objects.

When the POWER switch is set to ON. there should be a sound signal of two to four tone sequences lasting 3-4 s (auto-compensation process), then short clicks with a frequency of 3 s; if there are no clicks, replace the power supplies.

Check the sensitivity as follows: 3-4 seconds after the auto-compensation process, bring the probe with its pointed end to the center of the sensor at a distance of 20-30 cm (several times) - there should be a detection signal.

Set the maximum sensitivity for a given type of soil in the surveyed area, for which set the regulator knob to the maximum right position, in which the proximity of the sensor to the ground until it touches does not lead to an audible signal.

During operation, the mine detector sensor moves to the right and left at a speed of 0.1-1 m / s parallel to the ground, at a distance of up to 5 cm from it. After each stroke, the sensor moves forward at a distance of up to 20 cm. The fact of detecting a mine is accompanied by an audible signal. The frequency of the signal is proportional to the size and mass of the metal parts of the mine and inversely proportional to the distance from the mine to the sensor of the search element.

To clarify the location of the discovered mine, you must: stop; raise the sensor so that the tone of the sound signal becomes lower; without changing the height, move the sensor and find its position where the signal tone will be maximum (the search object is under the center of the sensor).

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 for individual use HSM 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
in) 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 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.