RU2434253C1 - Method to detect location of filled bioobjects or their remains and device for its realisation - Google Patents

Abstract

FIELD: salvage operations. ^ SUBSTANCE: device for the method realisation comprises a scanning unit and a transceiver. The scanning unit comprises a driving oscillator 1, a power amplifier 2, a circulator 3, a transceiving antenna 4, high-frequency amplifiers 5 and 26, a phase detector 6, a computer 7, a heterodyne 8, mixers 9, 11 and 27, an amplifier 10 of the first intermediate frequency, amplifiers 12 and 28 of the second intermediate frequency, the first 19 and 29 correlators, multipliers 20 and 30, low-pass filters 21 and 31, optimising peak-holding controllers 22 and 32, controlled delay units 23 and 33, a range indicator 24, the second receiving antenna 25, an angle indicator 34, phase doublers 35 and 39, phase dividers into two 36 and 40, low-pass filters 37 and 41, a phase metre 38. The transceiving unit comprises a piezocrystal 13, a microstrip antenna 14, electrodes 15, buses 16 and 17, a set of reflectors 18. ^ EFFECT: increased accuracy of their detection by accurate and unambiguous determination of their azimuth. ^ 2 cl, 3 dwg

Description

The invention relates to the field of search and rescue operations and can be used to search for bombarded bioobjects and their remains in earthquake areas, as well as in mountaineering when searching for bioobjects bombarded with, for example, avalanches or mountain landslides.

A known method and device for detecting the location of buried bioobjects or their remains (RF patents Nos. 2085997, 2105432, 2116099, 2206902, 2248235, 2288486, 2306159, 2370792; US patents Nos. 4129868, 4331957, 4673936, 6031482; EP patents No. 6031482; 1746433; Vinokurov V.K. et al. Safety in mountaineering. - M: 1983, p.136-136; Dikarev V.I. Safety, protection and salvation of a person. - St. Petersburg: 2007, 567 pp. And others).

Of the known methods and devices closest to the proposed are the "Method for detecting the location of buried bioobjects or their remains and a device for its implementation" (RF patent No. 2370792, G01V 3/12, 2007), which are selected as the base objects.

The specified method and device provide an increase in sensitivity and an increase in the range of action. For this, a low-power transceiver, which is used as a transducer on surface acoustic waves (SAWs), is preliminarily placed on a biological object belonging to a risk group.

However, the known technical solutions have a relatively low accuracy in determining the location of buried biological objects or their remains, it is provided mainly by the radiation pattern of the antenna of the scanning unit.

An object of the invention is to increase the accuracy of detecting the location of buried biological objects or their remains by accurately and unambiguously determining their azimuth.

The problem is solved in that a method for detecting the location of buried bioobjects or their remains, based on the closest analogue on what is previously placed on a bioobject belonging to a risk group, is a low-power transceiver, which is used as a piezocrystal with an aluminum counter-coated on its surface -shtyrevym converter connected to the microstrip antenna, and a set of reflectors, form a high-frequency oscillation with the carrier frequency w _c, it is converted by h OTE using frequency w _r LO isolated voltage of the first intermediate frequency w _up1, equal to the sum frequency w _up1 = w _d + w _c, increase its power, is irradiated with a scanning unit bombarded portion below the surface which can be bioobject or its remains directed by an electromagnetic signal, it is received on a bombarded biological object or its remains, converted into an acoustic wave, ensure its propagation over the surface of the piezocrystal and back reflection, transform the reflected acoustic wave again into the electromagnetic signal with phase shift keying, the internal structure of which corresponds to the structure of the interdigital transducer, the generated signal with phase shift keying is re-emitted by the microstrip antenna, receive by the first antenna of the scanning unit, amplified by the amplitude, the received signal with phase shift keying at the first intermediate frequency w _{up1 is reconverted} in frequency using the carrier frequency w _c , the first voltage of the second intermediate frequency is _isolated w _up2 = w _up1 -w _c = w _g1 , delayed they increase the local oscillator voltage for a time τ, multiply it with the first voltage of the second intermediate frequency w _up2 , _{select a} low-frequency voltage proportional to the first correlation function R ₁ (τ), change the delay time τ until the equality τ = τ _z1 , where τ _z1 = 2R / c, R is the distance to the bombarded bioobject or its remains, s is the propagation velocity of radio waves, maintain the indicated equality, which corresponds to the maximum value of the first correlation function R ₁ (τ), determine the distance R to the bombarded bioobject or machines and use the delayed local oscillator voltage to synchronously detect the received signal with phase shift keying at the second intermediate frequency w _up2 = w _g , differs from the closest analogue in that the signal with phase shift keying at the first intermediate frequency w _{up1 is} received on a second antenna spaced in the horizontal plane a distance d, where d - measuring base, it re-converted in frequency with the carrier frequency w _c, isolated a second voltage of the second intermediate frequency w _up2, multiply it with aderzhannym voltage at time τ LO isolated low frequency voltage proportional to the second correlation function R ₂ (τ), changing the delay time τ before the equation τ = τ _{s2, s2} where τ = t ₂ -t _1, t _1, t ₂ - time the signal passing the distances from the bombarded biological object or its remains to the first and second antennas, respectively, maintain the indicated equality, which corresponds to the maximum value of the second correlation function R ₂ (τ), form a time line for the azimuth

,

,

rough, but unequivocal, multiply and phase by phase, the first and second voltages of the second intermediate frequency w _up2 are separated, the harmonic voltages are extracted and the phase difference Δφ between them is measured, the phase azimuth reference scale is formed

,

,

where λ is the wavelength accurate but ambiguous.

The problem is solved in that a device for detecting the location of buried bioobjects or their remains, containing, in accordance with the closest analogue, a transceiver located on a bioobject belonging to a risk group and made in the form of a piezoelectric crystal with an aluminum thin-film interdigital transducer deposited on its surface, associated with a microstrip antenna, and a set of reflectors, while the interdigital transducer contains two comb systems of electrodes, electrodes each one of the combs is connected to each other by buses connected to a microstrip antenna, and a scanning unit consisting of a serially connected master oscillator, a first mixer, the second input of which is connected to the first output of the local oscillator, the amplifier of the first intermediate frequency, power amplifier, circulator, input-output which is connected to the horn transceiver antenna, the first high-frequency amplifier, the second mixer, the second input of which is connected to the output of the master oscillator, the first amplifier of the second intermediate frequency, phase detector, the second input of which is connected to the first output of the first adjustable delay unit, and a computer connected in series to the second output of the local oscillator of the first adjustable delay unit, the first multiplier, the second input of which is connected to the second output of the first amplifier of the second intermediate frequency, the first lower filter frequencies, the first extreme controller, the first adjustable delay unit and range indicator, while the second input of the computer is connected to the second output of the first unit As an adjustable delay, it differs from the closest analogue in that it is equipped with a second receiving antenna, a second high-frequency amplifier, a third mixer, a second intermediate frequency amplifier, a second multiplier, a second low-pass filter, a second extreme regulator, a second adjustable delay unit, an angle indicator , two phase doublers, two phase dividers into two, two narrow-band filters and a phase meter, and the second amplifier is connected in series to the output of the second receiving antenna frequency, the third mixer, the second input of which is connected to the output of the master oscillator, the second amplifier of the second intermediate frequency, the second multiplier, the second input of which is connected through the second block of adjustable delay to the second output of the local oscillator, the second low-pass filter, the second extreme regulator, the second block of adjustable delays and angle indicator, to the second output of the first amplifier of the second intermediate frequency, the first frequency doubler, the first phase divider into two, the first narrowband the second filter and phase meter, the output of which is connected to the third input of the computer, the fourth input of which is connected to the second output of the second adjustable delay unit, the second phase doubler, the second phase divider into two and the second narrow-band filter, the output of which is connected to the output of the second amplifier of the second intermediate frequency connected to the second input of the phase meter, the second receiving antenna is spaced horizontally from the first transceiver antenna at a distance d, where d is the measuring base.

A block diagram of a device that implements the proposed method is presented in figures 1 and 3. A frequency diagram illustrating the process of converting signals by frequency is shown in figure 2.

A device that implements the proposed method contains a scanning unit and a transceiver.

The scanning unit contains a serially connected master oscillator 1, a first mixer 9, the second input of which is connected to the first output of the first local oscillator 8, an amplifier 10 of the first intermediate frequency, a power amplifier 2, a circulator 3, the input-output of which is connected to a horn transceiver antenna 4, the first amplifier 5 high frequency, the second mixer 11, the second input of which is connected to the output of the master oscillator 1, the first amplifier 12 of the second intermediate frequency, a phase detector 6, the second input of which through the first block 23 regulates the delay is connected to the second output of the local oscillator 8, and the computer 7, connected in series to the second output of the local oscillator 8, the first block 23 adjustable delay, the first multiplier 20, the second input of which is connected to the second output of the amplifier 12 of the second intermediate frequency, the first low-pass filter 21, the first extreme regulator 22, adjustable delay unit 23 and range indicator 24, a second receiving antenna 25 connected in series, a second high-frequency amplifier 26, a third mixer 27, the second input of which is connected to the output the house of the master oscillator 1, the second amplifier 28 of the second intermediate frequency, the second multiplier 30, the second input of which is connected to the first output of the second adjustable delay unit 33, the second low-pass filter 31, the second extreme regulator 32, the second adjustable delay unit 33, the second input of which is connected with the second output of the local oscillator 8, and an angle indicator 34, connected in series to the second output of the first amplifier 12 of the second intermediate frequency, the first phase doubler 35, the first phase divider 36 into two, the first narrow-band filter 37 and phase meter 38, the output of which is connected to the second input of computer 7, the third and fourth inputs of which are connected to the outputs of the first 23 and second 33 adjustable delay units, respectively, connected in series to the output of the second amplifier 28 of the second intermediate frequency, the second phase doubler 39, the second divider 40 phases into two and a second narrow-band filter 41, the output of which is connected to the second input of the phase meter 38.

The first multiplier 20, the first low-pass filter 21, the first extreme controller 22 and the first adjustable delay unit 23 form the first correlator 19. The second multiplier 30, the second low-pass filter 31, the second extreme controller 32 and the second adjustable delay unit 33 form the second correlator 29.

The transceiver unit is made in the form of a piezocrystal 13 with an aluminum thin-film interdigital transducer deposited on its surface connected to a microstrip antenna 14 and a set of reflectors 18. The interdigital transducer of surface acoustic waves (SAW) contains two comb systems of electrodes 15, buses 16 and 17, which connect the electrodes of each of the combs to each other. Tires 16 and 17 are in turn connected to the microstrip antenna 14.

The proposed method is implemented as follows.

The master oscillator 1 forms a high-frequency oscillation

u _c (t) = U _c Cos (w _c t + φ _s ), 0≤t≤T _s ,

where U _c , w _c , φ _s , T _s - amplitude, carrier frequency, initial phase and duration of high-frequency oscillations,

which is fed to the first input of the first mixer 9, the second input of which is the voltage of the local oscillator 8

u _g (t) = U _g Cos (w _g t + φ _g ).

At the output of the mixer, combinational frequency voltages are generated. The amplifier 10 is allocated the voltage of the first intermediate (total) frequency

u _up1 (t) = U _pp1 Cos (w _up1 t + φ _up1 ), 0≤t≤T _s ,

where U _pp1 = ½U _c · U _g ;

w _up1 = w _g + w _c - the first intermediate (total) frequency;

φ _up1 = φ _s + φ _g ,

which after amplification in the power amplifier 2 through the circulator 3 enters the horn transceiver antenna 4 and is radiated by it into the air. With the help of a horn antenna 4, a bombarded area is sequentially irradiated, where the biological object or its remains are supposedly located.

The electromagnetic signal u _up1 (t) is received by the microstrip antenna 14 of the transceiver located on the biological object or its remains. The latter is a piezocrystal 13 with an aluminum thin-film interdigital SAW transducer deposited on its surface, which consists of two comb systems of electrodes 15 deposited on the surface of the piezocrystal 13. The electrodes of each of the combs are connected to each other by buses 16 and 17. The tires, in turn, connected to the microwave antenna 14.

The _received harmonic oscillation u _up1 (t) is converted by an interdigital transducer into an acoustic wave that propagates along the surface of the piezoelectric crystal 13, is reflected from a set of 18 reflectors, and is again converted into an electromagnetic signal with phase shift keying (PSK)

u ₁ (t) = U ₁ · Cos [w _up1 t + φ _к (t) + φ _up1 ], 0≤t≤T _c ,

where φ _к (t) = {0, π} is the manipulated phase component that displays the phase manipulation law in accordance with the modulating code M (t), and φ _к (t) = const for Kτ _e <t <(k + 1) τ _e and can change abruptly at t = Kτ _e , i.e. at the borders between elementary premises (K = 1, 2, ..., N-1);

τ _e , N is the duration and number of chips that make up the signal of duration T _c (T _c = N · τ ₃ ).

In this case, the internal structure of the generated PSK signal is determined by the topology of the interdigital transducer, has an individual character and contains all the necessary unique information about the owner, for example, last name, first name, middle name, year of birth, etc.

The generated PSK signal u ₁ (t) is radiated by the microstrip antenna 14 into the ether, received by the antennas 4 and 25 of the scanning unit:

u ₂ (t) = U ₂ · Cos [w _up1 (t-τ _з1 ) + φ _к (t-τ ₃₁ ) + φ ₂ ],

u ₃ (t) = U ₃ · Cos [w _up1 (t-τ _з2 ) -φ _to (t-τ _З2 ) + φ ₃ ], 0≤t≤T _c ,

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

τ _z2 = t ₁ -t ₂ , t ₁ , t ₂ - the time the signal travels distances from the bombarded biological object to the first 4 and second 25 antennas;

R is the distance from the scanning unit to the bombarded bioobject;

C is the propagation velocity of radio waves,

and through the circulator 3, the high-frequency amplifiers 5 and 26 are supplied to the first inputs of the mixers 11 and 27, respectively, to the second inputs of which a high-frequency oscillation u _c (t) is supplied from the output of the master oscillator 1 as the voltage of the second local oscillator. At the output of the mixers 11 and 27, voltages of combination frequencies are generated. Amplifiers 12 and 28 are the voltage of the second intermediate (differential) frequency:

u _up2 (t) = U _p2 · Cos [w _up2 (t-τ _z1 ) + φ _k (t-τ _z1 ) + φ _u2 ],

u _up3 (t) = U _p3 · Cos [w _up1 (t-τ _z2 ) + φ _k (t-τ _z2 ) + φ _u3 ], 0≤t≤T _c ,

where U _p2 = ½ U ₂ · U _c ;

U _p2 = ½ U ₃ · U _c ;

w _up2 = w _up1 -w _c = w _g - second intermediate (difference) frequency;

φ _up2 = φ ₂ -φ _s ;

φ _uр3 = φ ₃ -φ _s ,

which go to the first inputs of the multipliers 20 and 30, respectively, to the second inputs of which the local oscillator voltage 8

u _g1 (t) = U _g (t-τ) = U _g Cos [w _g (t-τ) + φ _g ],

where τ is the delay time of the blocks 23 and 33 adjustable delay,

through blocks 23 and 33 adjustable delay. The voltages obtained at the output of the multipliers 20 and 30 are passed through low-pass filters 21 and 31, respectively, at the output of which the correlation functions R ₁ (τ) and R ₂ (τ) are formed.

Extreme controllers 22 and 32 connected to the output of low-pass filters 21 and 31 act on the control inputs of adjustable delay units 23 and 33 and maintain the equality τ = τ _З1 and τ = τ _З2 , which corresponds to the maximum value of the correlation functions R ₁ (τ) and R ₂ (τ).

The range indicator 24 and the angle indicator 34 associated with the scales of the adjustable delay blocks 23 and 33 allow you to directly read the measured value of the distance R to the bombarded bioobject or its remains, as well as the measured azimuth value β to the bombarded bioobject or its remains:

,

,

,

,

where d is the distance between antennas 4 and 25 (measuring base).

Therefore, the task of measuring the distance (distance) R from the scanning unit to the bombarded biological object or its remains and the angular coordinate (azimuth) (β to the filled biological object or its remains is reduced to measuring the time delays between the relayed and probing signals and between the relayed signals received by the antennas 4 and 25.

This forms the time scale of the azimuth reference frame β: rough, but unambiguous.

Voltages u _up2 (t) and u _up3 (t) from the outputs of amplifiers 12 and 28 of the second intermediate frequency simultaneously arrive at the inputs of phase doublers 35 and 39, respectively, at the output of which the following harmonic voltages are generated:

u ₄ (t) = U ₄ · Cos [2w _up2 (t-τ _з1 ) + 2φ _up2 ],

u ₅ (t) = U ₅ · Cos [2w _up2 (t-τ _з2 ) + 2φ _up3 ],

where U ₄ = ½ U _pr2 ² ;

U _np2 = ½ U _np3 ² ;

2φ _k (t-τ _s1 ) = {0, 2π};

2φ _k (t-τ _s2 ) = {0, 2π}.

These voltages are fed to the inputs of phase dividers 36 and 40 into two, the output of which produces the following voltages:

u ₆ (t) = U ₆ · Cos [w _up2 (t-τ _з1 ) + φ _up2 ],

u ₇ (t) = U ₇ · Cos [w _up2 (t-τ _з2 ) + φ _up3 ],

which are allocated by narrow-band filters 37 and 41 and are fed to two inputs of the phase meter 38.

Phase meter 38 measures the phase difference

,

,

where d is the measuring base (distance between antennas 4 and 25);

λ is the wavelength.

This forms the phase scale of the azimuth reference frame β: accurate, but ambiguous, which provides a measure of the relative time delay between the relayed signals received by antennas 4 and 25.

The voltage u _up2 (t) from the second output of the amplifier 12 of the second intermediate frequency is simultaneously supplied to the first input of the phase detector 6. The second input of the phase detector 6 is supplied with voltage from the second output of the local oscillator 8 through the adjustable delay unit 23

U _g1 (t) = U _g · Cos [w _g (t-τ _z1 ) + φ _g ],

which is used as a reference voltage.

As a result of synchronous detection, the output of the phase detector 6 produces a low-frequency voltage

u _n (t) = U _n · Cosφ _k (t-τ _z1 ), 0≤t≤T _s ,

where U _n = ½ U _up2 · U _g ,

proportional to the modulating code M (t). This voltage, together with the measured values of the range R and azimuth β are recorded and analyzed in the computer 7.

The main characteristics of the device for detecting the location of biological objects or their remains include the following:

- transmitter power of the scanning unit - average not more than 100 mW;

- frequency range - 900-920 MHz;

- detection range - not less than 2000 m;

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

- type of emitted signal - harmonic oscillation;

- type of reflected (re-emitted) signal - broadband signal with phase shift keying (signal base B = Δf _c · T _s = 200-1000, Δf _c - spectrum width);

- dimensions of the transceiver located on the biological object or its remains, 8 × 15 × 5 mm;

- the service life of the transceiver is not less than 20 years;

- power consumption - 0 watts.

Each prospective participant in events that could make this participant potentially affected belongs to a risk group and should be equipped with a fairly simple, reliable and miniature device (such as a keychain, ring or small medallion), which should not impede the owner’s usual life activities, but must bear necessary unique information about this owner.

The second important requirement for this device is the ability to remotely read the information that it carries, an unlimited number of times, without any involvement of the owner and after a long time, for example, after an earthquake. This requirement is met by a SAW transceiver.

From the point of view of detection, complex QPSK signals have energetic and structural secrecy.

The energy secrecy of complex QPSK signals is due to their high compressibility in time or spectrum with optimal processing, which reduces the instantaneous radiated power. As a result, the broadband QPSK signal at the receiving point may be masked by noise and interference. Moreover, the energy of the broadband QPSK signal is by no means small; it is simply distributed over the time-frequency domain so that at each point of this region the signal power is less than the power of noise and interference.

The structural secrecy of broadband QPSK signals is caused by a wide variety of their forms and significant ranges of parameter values, which makes it difficult to optimize or at least quasi-optimal processing of broadband QPSK signals of an a priori unknown structure in order to increase the sensitivity of the receiving device.

Broadband FMN signals allow the use of a new type of selection - structural selection. This means that there is a new opportunity to distinguish these signals from other signals and interference operating in the same frequency band and at the same time intervals.

Thus, the proposed method and device in comparison with prototypes and other technical solutions of a similar purpose provide increased accuracy in detecting the location of buried biological objects or their remains. This is achieved by accurate and unambiguous determination of the azimuth β for the filled biological object, equipped with a transceiver sensor for surfactants, using two scales: phase and time. Moreover, the phase scale of the azimuth β is accurate, but ambiguous, and the time scale of the azimuth β is rough, but unambiguous.

Claims (2)

1. A method for detecting the location of buried bioobjects or their remains, based on the fact that a low-power transceiver is used as a pre-transmitter on a bioobject belonging to a risk group, using a piezocrystal with an aluminum interdigital transducer deposited on its surface and connected to a microstrip antenna, and a set of reflectors, form a high-frequency oscillation with the carrier frequency w _c, it is converted in frequency by using frequency w LO _g, allocate the first voltage KSR frequency w _up1, equal to the sum frequency w _up1 = w _d + w _c, increase its power, is irradiated with a scanning unit bombarded portion below the surface which can be bioobject or its remains, directional electromagnetic signal, taking it to strewn bioobject or its remains are converted into an acoustic wave, ensure its propagation on the surface of the piezocrystal and back reflection, convert the reflected acoustic wave again into an electromagnetic signal with phase shift keying, internal which truktura consistent with structure interdigital transducer formed by a signal with phase shift keying reemit microstrip antenna in ether, taking it first antenna scanning unit increase in amplitude, the received signal is phase shift keyed in the first intermediate frequency w _up1 re-converted in frequency with the carrier frequency w _c , isolate the first voltage of the second intermediate frequency w _up2 = w _up1 -w _c = w _g1 , delay the local oscillator voltage for a time τ, multiply it with the first voltage the second intermediate frequency w _up2 , _{select a} low-frequency voltage proportional to the first correlation function R ₁ (τ), change the delay time τ until the equality τ = τ _z1 , where t _z1 = 2R / c, R is the distance to the filled bioobject or its remains , c is the propagation velocity of the radio waves, maintain the indicated equality, which corresponds to the maximum value of the first correlation function R ₁ (τ), determine the distance R to the bombarded bioobject or its remains and use the delayed local oscillator voltage for synchronous detecting a received signal with phase shift keying at a second intermediate frequency w _up2 = w _g , characterized in that the signal with phase shift keying at a first intermediate frequency w _{up1 is} received at a second antenna spaced apart in a horizontal plane at a distance d, where d is the measuring base, repeatedly its frequency converted using the carrier frequency w _c, secrete second voltage of the second intermediate frequency w _up2, multiply it with delayed by time τ voltage oscillator emit low-frequency voltage, proportions nal second correlation function R ₂ (τ), changing the delay time τ before the equation τ = τ _{s2, s2} where τ = t ₂ -t _1, t _1, t ₂ - time of the signal from the buried distances bioobject or its remains until the first and the second antennas, respectively, maintain the indicated equality, which corresponds to the maximum value of the second correlation function R ₂ (τ), form the time scale of the azimuth

rough, but unequivocal, multiply and phase by phase the first and second voltages of the second intermediate frequency w _up2 , _{select the} harmonic voltages and measure the phase difference Δφ between them, form the phase azimuth reference scale

,
where λ is the wavelength accurate but ambiguous. 2. A device for detecting the location of bombarded bioobjects or their remains, containing a transceiver located on a bioobject belonging to a risk group and made in the form of a piezocrystal with an aluminum thin-film interdigital transducer deposited on its surface connected to a microstrip antenna and a set of reflectors, wherein the interdigital transducer contains two comb systems of electrodes, the electrodes of each of the combs are connected to each other by buses connected to a microstrip antenna, and a scanning unit, consisting of a serially connected master oscillator, a first mixer, the second input of which is connected to the first output of the local oscillator, an amplifier of the first intermediate frequency, a power amplifier, a circulator, the input-output of which is connected to a horn transceiver antenna, the first high-frequency amplifier , a second mixer, the second input of which is connected to the output of the master oscillator, the first amplifier of the second intermediate frequency, a phase detector, the second input of which is connected to the first output the house of the first adjustable delay unit, and a computer connected in series to the second local oscillator output of the first adjustable delay unit, the first multiplier, the second input of which is connected to the second output of the first intermediate frequency amplifier, the first low-pass filter, the first extreme controller, the first adjustable delay unit, and range indicator, while the second input of the computer is connected to the second output of the first adjustable delay unit, characterized in that it is provided with a second reception an antenna, a second high-frequency amplifier, a third mixer, a second intermediate-frequency amplifier, a second multiplier, a second low-pass filter, a second extremal regulator, a second adjustable delay unit, an angle indicator, two phase doublers, two phase dividers into two, two narrow-band filters and a phase meter, and a second high-frequency amplifier, a third mixer, the second input of which is connected to the output of the master oscillator, are connected in series to the output of the second receiving antenna the second amplifier of the second intermediate frequency, the second multiplier, the second input of which is connected through the second block of adjustable delay to the second output of the local oscillator, the second low-pass filter, the second extreme regulator, the second block of adjustable delay and the angle indicator, are connected to the second output of the first amplifier of the second intermediate frequency the first phase doubler, the first phase divider into two, the first narrow-band filter and phase meter, the output of which is connected to the third input of the computer, the fourth input of which It is connected to the second output of the second adjustable delay unit, the second phase doubler, the second phase divider into two and the second narrow-band filter, the output of which is connected to the second input of the phase meter, are connected to the output of the second amplifier of the second intermediate frequency, the second receiving antenna is spaced horizontally from the first transceiver antenna at a distance d, where d is the measuring base.

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