RU2388629C1 - Vehicle antitheft device - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates vehicle to safety and antitheft devices. Control station is equipped with transmitter, while vehicle carries receiver, actuator and passive transponder. Said transmitter comprises master oscillator, modulation coder generator, phase modulator, power amplifier, transceiver antenna, HF amplifier, duplexer, phase detector and computer. Also transmitter additionally comprises receiving antenna, HF amplifier, two multiplexers, two LF filters, two extremal controllers, two units of controlled delay, range indicator and angle indicator. Receiver comprises receiving antenna, HF amplifier, two spectrum width metres, narrow-band filter, phase detector, unipolar gate and storage. Actuator comprises key, ignition coil, two relays, switch, ignition switch, storage battery, side lights, sound signaling device, control switch, three capacitors, thyristor, two resistors and stabilising diode. Transponder comprises piezo crystal, micro strip antenna, electrodes, buses and reflecting plates. Principle of remote search and detection of stolen vehicle proceeds from using phase-modulated signal irradiated by transmitter to be received and selected, detected, accumulated and used to cut in side lights, sound signaling device and vehicle engine outage.

EFFECT: expanded performances, provision of detection of stolen vehicle and determination of its coordinates.

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Description

The proposed device relates to transport equipment, in particular to devices for preventing unauthorized use or theft of vehicles using radio channels.

Known anti-theft devices for vehicles using radio channels (RF patents №№2.006.394, 2.011.574, 2.011.575, 2.021.927, 2.033.352, 2.033.353, 2.033.354, 2.042.548, 2.058.906, 2.061.320, 2.061.321, 2.061.323, 2.180.293, 2.254.245 and others).

Of the known devices, the closest to the proposed one is "Anti-theft device for a vehicle" (RF patent No. 2.254.245, B60R 25/04, 2003), which is selected as a prototype.

The specified device provides remote search and detection of a stolen vehicle located in the common traffic stream, and its delay, i.e. when the stolen vehicle is in motion and energized on-board battery, as well as if it is in a static state and completely de-energized.

However, this device does not allow to determine the location of the stolen vehicle.

An object of the invention is to expand the functionality of the device by determining the location of the stolen vehicle.

The problem is solved in that the anti-theft device for a vehicle, containing, in accordance with the closest analogue, a transmitter installed at the control post and consisting of a serially connected master oscillator, a phase manipulator, the second input of which is connected to the output of the modulating code generator, power amplifier, a duplexer, the input-output of which is connected to the transceiver antenna, a second high-frequency amplifier, a second phase detector, the second input of which is connected to the rear output a generator, and a computer, a receiver mounted on the vehicle and consisting of a first receiving antenna, a first high frequency amplifier, a frequency doubler, a first spectral width meter, a comparison unit, the second input of which is connected to the output of the first amplifier through a second spectral width meter high frequency, the first threshold block, the second key, the second input of which is connected to the output of the first high-frequency amplifier, the first phase detector, the second input of which serially connected frequency divider into two and a narrow-band filter connected to the output of the frequency doubler, unipolar valve, drive and the second threshold block, the first and second relays mounted on the vehicle, the first made with closing and opening, and the second with closing contacts, the winding of the first of which connected to the vehicle’s battery through the ignition switch, and the disconnect is connected to the ignition coil power circuit, time delay assembly, thyristor included in the circuit the sound signal supply parallel to the sound signal switch and connected by the control electrode to the output of the time delay unit, the first key connected in series with the winding of the first relay, the control switch and signal lights, while the first relay is made with an additional make contact, which is included in the control circuit of the time unit delays, and its first make contact is connected between the first key and the vehicle body, and the winding of the second relay is connected in series interconnected make contact of the second relay and signal lamps connected in parallel are connected to the battery through the first make contact of the first relay, a passive transponder mounted on the vehicle, made on a piezocrystal with an aluminum thin-film converter deposited on its surface and a set of reflectors, while the converter is made in in the form of an interdigital structure, plays the role of a delay line on surface acoustic waves and contains two comb systems electrodes connected to each other by buses that are connected to a microstrip antenna, also made on the surface of a piezocrystal, differs from the nearest analogue in that it is equipped with a second receiving antenna, a third high-frequency amplifier, two multipliers, two low-pass filters, two extreme regulators, two blocks of adjustable delay, range indicator and angle indicator, and the first multiplier is connected in series to the output of the second high-frequency amplifier, the second input to through the first block of adjustable delay connected to the output of the phase manipulator, the first low-pass filter, the first extreme regulator and the first block of adjustable delay, to the second output of which a range indicator is connected, the third high-frequency amplifier, the second multiplier, and the second are connected in series to the output of the second receiving antenna the input of which is connected through the second block of adjustable delay to the output of the second high-frequency amplifier, a second low-pass filter, a second extreme regulator, and the second block of adjustable delay, the azimuth indicator is connected to the second output, the transmit-receive antenna and the second receive antenna are separated in the azimuthal plane by a distance d, where d is the measuring base.

The anti-theft device for a vehicle comprises a transmitter 1, a receiver 7, a transponder 50, and an actuator unit 27.

The structural diagram of the transmitter 1 is presented in figure 1. The structural diagram of the receiver 7 and the Executive unit 27 is presented in figure 2. The structural diagram of the transponder 50 is shown in Fig.3. Timing diagrams explaining the operation of the device shown in figure 4.

The transmitter 1, installed at the control station, consists of a serially connected master oscillator 2, a phase manipulator 4, the second input of which is connected to the output of the modulating code generator 3, power amplifier 5, duplexer 46, the input-output of which is connected to the transmitting and receiving antenna 6, the second high-frequency amplifier 47, the second phase detector 48, the second input of which is connected to the output of the master oscillator 2, and the computer 49, from the series connected to the output of the second high-frequency amplifier 47, multiply the first I am 58, the second input of which is connected through the first block 61 of the adjustable delay to the output of the phase manipulator 4, the first low-pass filter 59, the first extreme regulator 60 and the first block 61 of the controlled delay, to the second output of which a range indicator 62 is connected, and the second receiving antenna 63, the third high-frequency amplifier 64, the second multiplier 66, the second input of which is connected through the second adjustable delay unit 69 to the output of the second high-frequency amplifier 47, the second lower filter 67 x frequencies, the second extreme controller 68 and the second adjustable delay unit 69, to the second output of which an angle indicator 70 is connected. Moreover, the transmit-receive antenna 6 and the second receive antenna 63 are spaced in the azimuthal plane at a distance d, where d is the measuring base.

The first multiplier 58, the first low-pass filter 59, the first extreme controller 60, and the first 61 adjustable delay unit form the first correlator 57.

The second multiplier 66, the second low-pass filter 67, the second extremal regulator 68, and the second adjustable delay unit 69 form a second correlator 65.

The receiver 7 includes a receiving antenna 8 connected in series, a first high-frequency amplifier 9, a frequency doubler 12, a first spectral width meter 13, a comparison unit 14, the second input of which is connected to the output of a high-frequency amplifier 9 through a second spectral width meter 11, the first threshold block 15 , the second key 16, the second input of which is connected to the output of the high-frequency amplifier 9, the first phase detector 19, the second input of which is connected through two-way frequency divider 17 and the narrow-band filter 18 to the output frequency doubler 12, unipolar valve 20, drive 21 and second threshold block 22. Frequency doubler 12, spectral width meters 11 and 13, comparison unit 14, threshold blocks 15 and 22, key 16, phase detector 19, frequency divider 17, a narrow-band filter 18, a unipolar valve 20, and a drive 21 form a detector 10.

The Executive unit 27 consists of a series 28 ignition switch 28, a contact 25.1 and a first winding of the ignition coil 24 connected to the positive bus of the battery 29. In parallel with the battery 29, the ignition switch 28, the relay coil 25, the first key 23 and the switch 26, the contacts 25.2, 30.1 and the signal lamps 31-34 connected in parallel and the relay coil 30 in series, are connected in series. To the positive bus of the battery 29, a terminal 25.2, an audible warning device 35 and a time delay unit 40 are connected in series. A transistor 41 shunted by thyristor 38 and a capacitor 39 are connected to the output of the audible alarm 35. A zener diode 44 is connected to the base circuit of the transistor 41. A resistor 42, a resistor 43, a terminal 25.3, and a capacitor 45 are connected in series to the audible alarm 35.

The transponder 50 is a piezocrystal 51 with an aluminum thin-film transducer deposited on its surface and a set of reflectors 56. Moreover, the transducer is made in the form of an interdigital structure, plays the role of a delay line on surface acoustic waves (SAW) and contains two comb systems of electrodes 53 connected to each other with another bus 54 and 55, which are connected to a microstrip antenna 52, also made on the surface of the piezocrystal 51.

The principle of remote search and detection in the general transport stream of a stolen vehicle is based on the use of a complex phase-shift (PSK) signal, which is emitted by the transmitter, received and selected by the receiver, detected, accumulated and used to turn on marker lamps, an audible warning device and turn off the engine. Moreover, the included lamps 31-34 and the audible warning device 35 are a sign of detection of a stolen vehicle, and the turned off engine provides a delay of the vehicle and the hijacker. In this case, the transmitter 1 is installed at the control posts or the traffic police cars, and the receiver 7 and the executive unit 27 - on vehicles.

The use of a complex QPSK signal makes it possible to apply a new type of selection ~ structural selection, which provides higher noise immunity and reliability of distinguishing the specified signal from other signals and interference operating in the same frequency band and at the same time intervals.

The principle of operation of the interdigital transducer is based on the fact that the electric fields in space and time created in a piezoelectric crystal by a system of electrodes cause elastic strains due to the piezoelectric effect, which propagate in the crystal as a surfactant.

The device operates as follows.

After turning on the transmitter 1 high-frequency oscillation (figure 4, a)

U ₁ (t) = υ _s Cos (ω _c t + φ _c ), O≤t≤T _c ,

where υ _c , ω _c , φ _c , T _c is the amplitude, carrier frequency, initial phase, and duration of the high-frequency oscillation, from the output of the master oscillator 2, goes to the first input of the phase manipulator 4, to the second input of which the modulating code M ₁ (t) (figure 4, b) from the output of the generator 3 of the modulating code. As a result of phase manipulation at the output of the phase manipulator 4, the PSK signal is generated (Fig. 4, c)

U ₂ (t) = υ _s · COS [ω _c t + φ _к1 (t) + φ _c ], O≤t≤T _c ,

where φ _кt (t) = {о, π} is the manipulated component of the phase that displays the law of phase manipulation in accordance with the modulating code M ₁ (t), and φ _к1 (t) = const for К · τ _u <t <(К +1) · τ _u and can change stepwise at t = K · τ _u , i.e. at the boundaries between elementary premises (K = 0, 1, 2, ..., N-1);

τ _u , N is the duration and number of chips that make up the signal of duration T _c (T _c = N · τ _u ).

This signal after amplification in the power amplifier 5 is radiated by the antenna 6. In this case, the transceiver antenna 6 can be directional, for example, parabolic, which ensures irradiation of only the transport stream passing by the control point. The QPSK signal U ₂ (t) is captured by the receiving antenna 8 of the vehicle and, through the high-frequency amplifier 9, is fed to the input of the detector 10, consisting of measuring instruments 11 and 13 of the spectral width, frequency doubler 12, comparison unit 14, threshold block 15, key 16, a frequency divider 17 into two, a narrow-band filter 18, a phase detector 19, a unipolar valve 20, a drive 21 and a threshold unit 22. A harmonic voltage is generated at the output of the frequency doubler 12 (Fig. 4, d)

U ₃ (t) = υ _c Cos (2ω _c t + 2φ _c ), O≤t≤T _c .

Since 2φ _k (t) = {o, 2π}, phase manipulation is already absent in the indicated voltage.

The width of the spectrum Δf _{2 of the} second harmonic is determined by the duration T _{s of the} signal (Δf ₂ = 1 / T _s ), while the width of the spectrum Δf _{c of the} QPSK signal is determined by the duration τ _{u of} its elementary premises (Δf _c = 1 / T _u ), i.e. . the width of the spectrum Δf _{2 of the} second harmonic of the signal is N times smaller than the width of the spectrum Δf _{c of the} input signal Δf _C / Δf ₂ = N.

Therefore, when the frequency of the QPSK signal is doubled, its spectrum collapses N times. This makes it possible to detect the QPSK signal among other signals, noise, and interference even when its power at the receiver input is less than the power of noise and interference.

The spectrum width Δf _{c of the} input QPSK signal is measured using meter 11, and the spectrum width Δf _{2 of the} second harmonic of the signal is measured using meter 13. Voltage υ ₁ and υ ₂ proportional to Δf _c and Δf _2, respectively, from the outputs of meters 11 and 13 of width spectrum are fed to two inputs of the comparison unit 14. Since υ ₁ >> υ ₂ , a positive voltage is generated at the output of the comparison unit 14, which exceeds the threshold level υ _opop1 in the threshold unit 15. The threshold level υ _opop1 is chosen so that it is not exceeded by random noise. When exceeding the threshold level υ _pop1 in the threshold block 15, a constant voltage is generated, which is supplied to the control input of the key 16, opening it. Keys 16 and 23 in the initial state are always closed. In this case, the PSK signal U ₂ (t) (Fig. 4, c) from the output of the high-frequency amplifier 9 through the public key 16 is fed to the information input of the phase detector 19. The harmonic voltage U ₃ (t) (Fig. 4, d) s the output of the frequency doubler 12 at the same time enters the input of the frequency divider 17 into two, the output of which a voltage is generated (figure 4, d)

U ₄ (t) = υ _c Cos (ω _c t + φ _c ), O≤t≤T _c .

This voltage is allocated by a narrow-band filter 18 and is supplied to the reference input of the phase detector 19. At the output of the latter, a low-frequency voltage is generated (Fig. 4, e)

U _н1 (t) = υ _н1 · Cos φ _к1 (t), O≤t≤T _c

where υ _н1 = 1/2 K ₁ · υ _c ² ;

K ₁ - the transfer coefficient of the phase detector,

corresponding in form to the modulating code M ₁ (t) (Fig. 4, e). The specified voltage is supplied to the input of a unipolar valve 20, the output of which only positive impulses are generated (figure 4, g). These pulses after accumulation in the drive 21 exceed the threshold level υ _pop2 in the threshold block 22. When this level is exceeded, a constant voltage is generated in the threshold block 22, which is supplied to the control input of the key 23, opening it. In this case, the constant voltage of the battery 29 through the closed ignition switch 28, the open key 23 and the closed device switch 26 is supplied to the relay coil 25. The device switch 26 is installed on the vehicle in a place known only to the owner. When the relay 25 is activated, contact 25.1 opens and contacts 25.2 and 25.3 close. Open contacts 25.1 turn off the engine, which causes the vehicle to stop.

The constant voltage of the battery 29 through a closed contact 25.2 is fed to the coil of the relay 30, which is activated and closes the contact 30.1. In this case, the signal lamps 31-34 are installed, installed on the front and rear panels of the vehicle body. At the same time, the voltage of the battery 29 through a closed contact 25.2 is supplied to the audible warning device 35. The operation of the warning lamps 31-34 and the audible warning device is a sign of detection of a stolen vehicle.

The anti-theft device circuit uses the sound alarm and parking lamps already on the vehicle.

When the contacts 25.2 and 25.3 are closed, the supply voltage is also supplied to the time delay unit 40, consisting of a transistor 41, resistors 42 and 43, a zener diode 44, and a capacitor 45. The capacitor 45 starts to charge after a certain time interval (5-7 s.), Which regulated by a variable resistor 43, the voltage across the capacitor 45 reaches the opening voltage of the zener diode 44, the thyristor 38 is unlocked and the buzzer 35 is activated. To maintain the thyristor 38 in open state, the charge of the capacitor 37 is used. Sound buzzer OP 35 and position lamps 31-34 continue to operate until the vehicle and the hijacker are detained. If the audible alarm 35 is activated, it cannot be turned off only by turning off the ignition switch 28. To turn off the audible alarm 35, it is necessary to turn off the ignition and briefly press the switch 36. This ensures that the thyristor 38 is locked and its re-opening is prevented.

At the same time, the probing QPSK signal U ₂ (t) irradiates a passive transponder 50, which can be mounted in one or more elements of the vehicle, camouflaged for a specific object, or can be made in the form of a separate miniature device that is placed in a secret place of the vehicle.

The principle of operation of the passive transponder 50 is based on the acoustic processing of the received FMN radio pulse using a delay line on surface acoustic waves (SAWs).

Surface acoustic waves are waves that propagate along the surface of solids in a relatively thin surface layer. The propagation velocity of surfactants in crystals is approximately five orders of magnitude lower than the propagation velocity of electromagnetic waves. This means that on a centimeter of the crystal you can fit information that will fill a kilometer-long cable. The high information capacity of SAW devices was first used in delay lines, which allow storing, converting, channeling, diverting and reflecting the signals propagating in them.

The basis of the operation of devices for surfactants are three physical processes:

- conversion of the input electrical signal into an acoustic wave;

- the propagation of an acoustic wave over the surface of a sound duct and its reflection;

- the inverse transformation of the surfactant into an electrical signal with parameters determined by the internal structure of the interdigital transducer.

For forward and reverse conversion, an interdigital converter is used, the passband of which is much larger than the spectrum width Δf _{c of the} received signal.

An acoustic wave obtained in the transducer propagates along the surface of the piezocrystal 51 and after a while reaches the reflecting plates 56, which reflect the acoustic wave back with a phase determined by the position of the reflecting plates 56 and an amplitude proportional to the reflection coefficient. The surfactant converter converts the reflected acoustic wave back into a radio pulse with phase shift keying

U ₅ (t) = υ ₅ · Cos [ω _c t + φ _к1 (t) + φ _c ], O≤t≤T _c

where φ _к1 (t) = {о, π} - is determined by the internal structure of the interdigital transducer.

The generated radio pulse U ₅ (t) is emitted by the microstrip antenna 52 on the air, received by antennas 6 and 63 of the control point:

U ₆ (t) = υ ₆ · Cos [ω _c (t-τ _zl ) + (φ _kl (t-τ _z1 ) + φ _z1 ],

U ₇ (t) = υ ₇ · Cos [ω _c (t + τ _z2 ) + φ _k1 (t-τ _z2 ) + φ _c ], O≤t≤T _c ,

where τ _z1 = 2R / C is the delay time of the relay signal relative to the request;

R is the distance between the control point and the stolen vehicle;

C is the propagation velocity of radio waves.

The voltage U ₆ (t) from the output of the antenna 6 through the duplexer 46 and the high-frequency amplifier 47 is supplied to the first inputs of the phase detector 48 and the multiplier 58. High-frequency oscillation U ₁ (t) is supplied from the output of the master oscillator to the second (reference) input of the phase detector 48 2. At the output of the phase detector 48, a low-frequency voltage is generated

U _n2 (t) = υ _n2 · Cos φ _k1 (t), O≤t≤T _c ,

where υ _Н2 = 1/2 · K ₁ · υ ₅ · υ _c ,

proportional to the modulating code M ₁ (t). This voltage from the output of the phase detector 48 is sent to the database of the computer 49 for identification. It is an individual marking of the inspected vehicle, for example, its identification number.

It should be noted that the emitted QPSK signal contains the identification number of the stolen vehicle. The low-frequency voltage U _H2 (t) entering the computer database 49 is a confirmation (receipt) that the irradiated vehicle is stolen.

The voltage U ₆ (t) from the output of the high-frequency amplifier 47 is simultaneously supplied to the first input of the multiplier 58, to the second input of which a probing PSK signal U ₂ (t) is supplied from the output of the phase manipulator 4 through the adjustable delay unit 61. The voltage obtained at the output of the multiplier 58 is passed through a low-pass filter 59, at the output of which a first correlation function R ₁ (τ) is formed. The extreme controller 60, designed to maintain the maximum value of the correlation function R ₁ (τ) and connected to the output of the low-pass filter 59, acts on the control input of the adjustable delay unit 61 and maintains the delay τ introduced by it equal to τ _s1 (τ = τ _s1 ), which corresponds to the maximum value of the correlation function R ₁ (τ). The range indicator 62, associated with the scale of the adjustable delay unit 61, allows you to directly read the measured distance R between the control point and the stolen vehicle

R = C · τ _s1 / 2.

Therefore, the task of measuring the range (distance) R is reduced to measuring the time delay τ _{s1 of the} relay signal relative to the request.

The voltage U ₇ (t) from the output of the receiving antenna 63 through the high-frequency amplifier 64 is supplied to the first input of the multiplier 66, the second input of which is supplied via the adjustable delay unit 69 to the voltage U ₆ (1) from the output of the high-frequency amplifier 47. The voltage obtained at the output of multiplier 66 is passed through a low-pass filter 67, at the output of which a correlation function R ₂ (τ) is formed. The extreme controller 68, designed to maintain the maximum value of the correlation function R ₂ (τ) and connected to the output of the low-pass filter 67, acts on the control input of the adjustable delay unit 69 and maintains the delay τ introduced by it equal to τ _s2 (τ = τ _s2 ), which corresponds to the maximum value of the correlation function R ₂ (τ).

The scale of the block 69 adjustable delay (pointer 70 azimuth) is calibrated directly in the angular coordinates of the stolen vehicle

β = arc Cos C · τ _z2 / d,

where β is the azimuth of the stolen vehicle;

d - measuring base.

Therefore, the task of measuring the azimuth β of the hijacked vehicle is reduced to measuring the time delay τ _s2 between the relayed signals received by antennas 6 and 63.

By measuring the range R and the azimuth β of the stolen vehicle, the location of the stolen vehicle is determined at the control point.

The main characteristics of the device include the following:

- average transmitter power - not more than 100 mW;

- frequency range - 400-420 (900-920) MHz;

- range - not less than 200 m;

- the number of code combinations - 2 ³² - 2 ¹²⁸ ;

- type of emitted signal and the signal of the responder - broadband QPSK signals (signal base B = 20-100);

- transponder dimensions - 8-15.5 mm;

- transponder service life - at least 20 years;

- power consumed by the transponder - 0 W.

The proposed device provides not only remote search and detection of a stolen vehicle located in the general traffic stream, and its delay, but also transmission to the control point of alarm information containing information about the stolen vehicle.

In addition, alarm information is transmitted to the control point via radio channel when the stolen vehicle is in a static de-energized state in the parking lot, in the garage or simply on the street with its corresponding exposure to the scanning device.

The main advantage of the automatic teleindication system of a stolen vehicle located in dynamics or statics is the ability to use passive, i.e. small-sized transponder that does not require power sources.

Another advantage is the possibility of combining the functions of re-emission of energy, coding of individual information about a stolen vehicle and the functions of a sensor of any physical quantity in one device with a simple design.

In some cases, the positive property of a passive surfactant transponder for surfactants can be considered low costs for long-term operation (lack of battery and long MTBF).

In addition, in special cases, the reading of individual markings from stolen vehicles can be done covertly, without visible signs of their exposure.

Thus, the proposed device in comparison with the prototype provides a measurement of R and azimuth β of the hijacked vehicle, i.e. its location, regardless of the state of the stolen vehicle: in motion (dynamics) or in static state, without power, in the parking lot, in the garage or just outside. This is achieved using complex signals with phase shift keying and their correlation processing. Thus, the functionality of the device is expanded.

Claims (1)

An anti-theft device for a vehicle, containing a transmitter installed at the control station and consisting of a serially connected master oscillator, a phase manipulator, the second input of which is connected to the output of the modulating code generator, power amplifier, duplexer, the input-output of which is connected to the transceiver antenna, and the second amplifier high frequency, a second phase detector, the second input of which is connected to the output of the master oscillator, and a computer, a receiver mounted on a transport medium and consisting of a series-connected receiving antenna, a first high-frequency amplifier, a frequency doubler, a first spectral width meter, a comparison unit, the second input of which is connected through the second spectral width meter to the output of the first high-frequency amplifier, the first threshold block, the second key, the second input which is connected to the output of the first high-frequency amplifier, the first phase detector, the second input of which through series-connected frequency divider into two and a narrow-band filter connected with the output of a frequency doubler, a unipolar valve, a drive and a second threshold block, the first and second relays mounted on the vehicle are made of the first with make and break and the second with make contacts, the winding of the first of which is connected to the vehicle’s battery through the ignition switch, and the disconnecting circuit is included in the power supply circuit of the ignition coil, the time delay assembly, the thyristor included in the power supply circuit of the audible warning device parallel to the switch of the audible warning device and connected by a control electrode to the output of the time delay unit, a first switch connected in series with the winding of the first relay, a control switch and signal lights, the first relay being made with an additional make contact, which is included in the control circuit of the time delay unit, and its first make contact is connected between the buzzer and the ignition switch, a control switch is connected between the first key and the vehicle body, and the winding of the second relay and in series with interconnected make contact of the second relay and signal lamps connected in parallel are connected to the battery through the first make contact of the first relay, a passive transponder mounted on the vehicle, made on a piezocrystal with an aluminum thin-film converter deposited on its surface and a set of reflectors, while the converter is made in in the form of an interdigital structure, plays the role of a delay line on surface acoustic waves and contains two comb-like system of electrodes connected to each other by buses that are connected to a microstrip antenna, also made on the surface of a piezocrystal, characterized in that it is equipped with a second receiving antenna with a third high-frequency amplifier, two multipliers, two low-pass filters, two extreme regulators, two adjustable blocks delays, range indicator and angle indicator, and to the output of the second high-frequency amplifier, the first multiplier is connected in series, the second input of which through the first adjustable delay unit is connected to the output of the phase manipulator, the first low-pass filter, the first extreme controller and the first adjustable delay unit, the range indicator is connected to the second output of the third high-frequency amplifier, the second multiplier, the second input of which is connected in series to the output of the second receiving antenna through the second block of adjustable delay connected to the output of the second high-frequency amplifier, a second low-pass filter, a second extreme regulator and a second block p adjust- able delay to the second output of which is connected a pointer azimuth, antenna and the second receiver antenna spaced apart in the azimuthal plane by a distance d, where d - measuring base.

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