RU2638504C1 - Method of identifying subject on serviced object and device for its implementation - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: device that implements the proposed method contains n identifiers located on the objects, a smart key 2 that the subject is equipped with, and a dispatch centre 7. Each identifier contains a piezoelectric crystal 1i, a transceiver antenna 8i, electrodes 9i, buses 10i and 11i, a set of reflectors 12i, an accessibility block to the CT 36i, a narrowband filter 37.i, an amplitude detector 38i, keys 39i and 40i (i=1, 2, …, n). The smart key 2 comprises a reader 3, a microcontroller 4, a transceiver 5, a LED 6, a transmit and receive antenna 15, a bandpass filter 16 and 22, phase detectors 17 and 25, multipliers 18 and 23, narrowband filters 19 and 24, a phase manipulator 20, a power amplifier 21, a duplexer 14, a synchronizer 41, a carrier frequency synchronizer 42, and an AND logic gate 43. The dispatch centre 7 includes a master oscillator 30, a computer 31, a multiplier 32, a narrowband filter 33, a phase manipulator 34, a power amplifier 35, a duplexer 27, a transmit and receive antenna 26, a bandpass filter 28, and a phase detector 29.

EFFECT: increasing the reliability of reading individual codes simultaneously from several objects located in the radio exposure zone, by successive radio questioning them in time.

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Description

The proposed method and device relate to methods of protecting objects from unauthorized access and registration of staff serving the objects, and in particular to identification methods that allow registering entities that have access to objects, as well as register unlocking of locks at objects by unauthorized entities.

Known methods and devices for protecting objects from unauthorized access (RF patents Nos. 2.091.553, 2.223.376, 2.236.527, 2.283.412, 2.299.962, 2.299.298, 2.317.387, 2.384.683, 2.434.108; U.S. Patent Nos. 4,000.475, 4.042.970, 4.333.090, 4.743.898, 5.534.852; UK Patents Nos. 1,453,298, 2,261.254; French Patents Nos. 2,197,406, 2,687,240; Dikarev B .I., Zarenkov V.A., Zarenkov D.V., Koinash B.V. Protection of objects and information from unauthorized access. St. Petersburg, Izvo Stroyizdat St. Petersburg, 2004 and others).

Of the known methods and devices closest to the proposed one is the "Method for identifying a subject at a serviced object" and a device for its implementation (RF patent No. 2.434.108, EV 39/00, 2010), which are selected as prototypes.

The known method includes the approach or contact of an authorized access device located on the object, and a smart key that reads information from the specified device. The device with authorized access to the object is an identifier with an individual code, which includes an integrated microcircuit and operates in the "request-response" mode. The "smart key" is made on the basis of a GSM modem with a SIM card and an individual number and contains a reader with a microcontroller configured to read an individual SIM card number and an individual identifier code. The method also includes transmitting said codes in the form of control code information to a dispatch center deciding on the reliability or unreliability of the information received, in this case, the subject receives a light signal on the smart key LED, and in the second, the identification process is repeated. The method allows you to monitor the work of the subject in real time.

Traditionally, the access of the subject to the serviced object is carried out according to the principle of operation of intercoms in the entrance of an apartment building, when the subject, using an intelligent key with an access code, opens an electronic lock reading this code from the key. However, in the case when one entity must gain access to many objects, this principle is economically disadvantageous due to the high cost of the electronic lock.

Therefore, a disadvantage of the known technical solutions is the impossibility of simultaneous access of one subject to several objects located in the radio sounding zone. Otherwise, with simultaneous access to several objects, the response signals from them will come simultaneously and the code sequences overlap each other, making it impossible to independently read the individual code of each object.

An object of the invention is to increase the reliability of reading individual codes simultaneously from several objects located in the radio sounding zone, by sequentially in time of their radio request.

The problem is solved in that the method of identifying a subject at a serviced object, based, in accordance with the closest analogue, on the proximity or contact of an authorized access device located on the object and an intelligent key that reads information from the specified device, and the authorized access device to the object serves an identifier with an individual code operating in the "request-response" mode, and the smart key is made on the basis of a GSM modem with a SIM card and an individual number m, contains a microcontroller, configured to read an individual SIM card number and an individual identifier code, as well as transmitting the indicated codes in the form of control code information to a dispatch center deciding on the reliability or inaccuracy of the information received, in this case, the subject receives a light the signal to the LED of the smart key, in the second - the identification process is repeated, the identifier with an individual code is performed in the form of a piezoelectric crystal deposited on th surface thin film aluminum interdigital transducer comprising two interdigitated electrode system, the interconnected buses, a set of reflectors and a microstrip antenna, form a high frequency probing oscillation at carrier frequency ω ₁ are irradiated to them identifier capture high frequency probing oscillation microstrip antenna identifier, convert it into acoustic wave, ensure its propagation over the surface of the piezocrystal and back reflection, transform the reflected th acoustic wave into an electromagnetic signal with phase shift keying, the internal structure of which is determined by the structure of an interdigital transducer and corresponds to the individual code emit it in the air at a frequency ω _1, catch transceiver antenna reader, carried out synchronous detection of the electromagnetic signal with phase shift keying using a high frequency probe oscillations at frequency ω _1, allocate a low-frequency voltage proportional to the unique code, and directed t it to the microcontroller by which the form of control codes information, dual phase high-frequency probe oscillations isolated harmonic oscillation with a frequency ω ₂ = 2ω _1, manipulate its phase-control code information, thereby forming a complex signal with phase shift keying, emit it in ether at frequencies ω ₂ , catch the transceiver antenna of the control center, synchronously detect a complex signal with phase shift keying using harmonic oscillation at range ω ₂ as a reference voltage, a low-frequency voltage is proportional to the control code information, it is checked with a computer for reliability, if the control code information is reliable, then the received information is decoded indicating the name of the object and the identity of the subject receiving access, form its individual code, double the phase of harmonic oscillation at a frequency of ω ₂ , isolate harmonic oscillation with a frequency of ω ₃ = 2ω ₂ , manipulate it in phase with an individual code m of the subject, thereby forming a complex signal with phase shift keying, radiate it on the air at a frequency of ω ₃ , pick up a smart key transceiver antenna, synchronously detect a complex signal with phase shift keying using harmonic oscillation at a frequency of ω ₃ as a reference voltage, isolate a low-frequency voltage proportional to the individual code of the subject, and direct it to the microcontroller, which differs from the closest analogue in that in the reader of the smart key they generate n interrogated radio pulses, where n is greater than or equal to the number of objects located simultaneously in the radio emission zone, for each given time interval Δt sufficient to read an individual code from each identifier, a probe oscillation at a carrier frequency ω ₁ and one of the interrogated radio pulses at a frequency ω _zi where i = 1, 2, ..., n, each identifier unit supplying accessibility to the interdigital transducer tuned to the frequency ω _zi one of the interrogation radio pulses, and sequentially in time impl stvlyayut reading of individual codes of all identifiers that are in the area to radio waves.

The problem is solved in that the device for identifying the subject at the serviced object, containing, in accordance with the closest analogue, an identifier located on the object, an individual key supplied with the subject and the dispatch center, or this identifier is made in the form of a transceiver antenna and a piezoelectric crystal printed on its surface is a thin-film aluminum interdigital transducer containing two comb systems of electrodes interconnected by buses, and a set of reflectors, intel The optical key contains a serially connected master oscillator, a first multiplier, the second input of which is connected to the output of the master oscillator, a first narrow-band filter, a phase manipulator, the second input of which is connected to the second output of the microcontroller, a power amplifier, a duplexer, the input-output of which is connected to the transceiver antenna, the first bandpass filter, the first phase detector, the second input of which is connected to the output of the master oscillator, a microcontroller and an LED, connected in series to the output the first narrow-band filter, the second multiplier, the second input of which is connected to the output of the first narrow-band filter, the second narrow-band filter and the second phase detector, the second input of which is connected through the second band-pass filter to the output of the duplexer, and the output is connected to the input of the microcontroller, the control center contains a serially connected master generator, multiplier, the second input of which is connected to the output of the master oscillator, narrow-band filter, phase manipulator, power amplifier, duplexer, input-output One of which is connected to a transceiver antenna, a bandpass filter, a phase detector, the second input of which is connected to the output of the master oscillator, and a computer whose output is connected to the second input of the phase manipulator, differs from the closest analogue in that the identifiers are equipped with n blocks for access to the interdigital transducer, where n is greater than or equal to the number of objects located in the radio emission zone, each access block to the interdigital transducer consists of series-connected to the receiver To the transmitting antenna of the narrow-band filter, the amplitude detector and two keys connected between the transceiver antenna and the buses of the interdigital transducer, respectively, the smart key is equipped with a synchronizer, a carrier frequency synthesizer and an AND logic element, and a synchronizer, a master oscillator and a logic element are connected in series to the third output of the microcontroller And, the second input of which through the carrier frequency synthesizer is connected to the second output of the synchronizer, and the output is connected to the second input dy duplexer, a third input coupled to a third output of the synchronizer.

The identifier block diagrams are shown in FIG. 1. The block diagram of the smart key is shown in FIG. 2. A block diagram of a control center is shown in FIG. 3.

Each identifier is made in the form of a piezocrystal 1.i with a thin-film aluminum interdigital transducer (IDT) deposited on its surface, containing two comb systems of electrodes 9.i, interconnected by buses 10.i and 11.i, and a set of 12.1 reflectors, as well as an access to IDT unit 36.i, consisting of a narrow-band filter 37.i connected in series to a transceiver antenna 8.i, an amplitude detector 38.i, and two keys 39.i and 40.i connected between the transceiver antenna 8. i and IDT tires 10.i and 11.i respectively.

The smart key 2 contains a reader 3, a microcontroller 4, a transceiver 5, and an LED 6. The reader 3 contains a serially connected synchronizer 41, a master oscillator 13, a logical element AND 43, the second input of which is connected to the second output of the synchronizer 41 through the carrier frequency synthesizer 42, the input is the output is connected to the transceiver antenna 15, the first band-pass filter 16, the first phase detector 17, the second input of which is connected to the output of the master oscillator 13, controller 4 and LED 6. To the input of the master oscillator 13 the first multiplier 18 is connected, the second input of which is connected to the output of the master oscillator 17, the first narrow-band filter 19, the phase manipulator 20, the second input of which is connected to the second output of the microcontroller 4, and the power amplifier 21, the output of which is connected to the third input of the duplexer 14. K the output of the first narrow-band filter 19 is connected in series to the second multiplier 23, the second input of which is connected to the output of the first narrow-band filter 19, the second narrow-band filter 24 and the second phase detector 25, the second input to through the second bandpass filter 22, it is connected to the output of the duplexer 14, and the output is connected to the second input of the microcontroller 4, the third output of which is connected to the input of the synchronizer 41.

Dispatch center 7 contains a serially connected master oscillator 30, a multiplier 32, the second input of which is connected to the output of the master oscillator 30, a narrow-band filter 33, a phase manipulator 34, a power amplifier 35, a duplexer 27, the input-output of which is connected to a transceiver antenna 26, a bandpass filter 28, a phase detector 29, the second input of which is connected to the output of the master oscillator 30, and a computer 31, the output of which is connected to the second input of the phase manipulator 34.

The proposed method is implemented as follows.

Identifiers 1.i with an individual code on each object are fixed on the objects (i = 1, 2, ..., n, n is the number of objects located in the radio emission zone). Each identifier is a piezocrystal with a thin-film aluminum interdigital transducer (IDT) deposited on its surface, an acoustic wave surface (SAW), which consists of two comb systems of electrodes 9.i connected by buses 10.i and 11.i, a set 12.i reflectors, as well as the IDT access block 36.i, which consists of a narrow-band filter 37.i, an amplitude detector 38.i, and two keys 39.i and 40.i connected in series with the transceiver antenna 8.i transceiver antenna th 8.i and tires 10.i and 11.i IDT, respectively.

The principle of operation of the interdigital surfactant transducer is based on the fact that the electric fields in space and time created in the piezoelectric crystal by the electrode system 9.i cause elastic strains that propagate in the crystal in the form of surfactants.

Subject - the person servicing the objects has the smart key 2 in his hands and turns it on at the right time. In this case, the microcontroller 4 and the synchronizer 41 turn on the master oscillator 17 and the carrier frequency synthesizer 42. The master oscillator 13 generates a high-frequency oscillation (read radio pulse)

U ₁ (t) = V ₁ ⋅cos (ω ₁ t + ϕ ₁ ), 0≤t≤T ₁

Synthesizer 42 carrier frequencies are formed request radio pulses:

U _Z1 (t) = V _P1 ⋅cos (ω t + φ _{P1 P1),}

U _s2 (t) = V _s2 ⋅cos (ω t + φ _{s2 s2),}

U _Зi (t) = V _Зi ⋅cos (ω _Зi t + ϕ _Зi ),

U _zn (t) = V _zn ⋅cos (ω _zn t + 9 _zn ), 0≤t≤Tn

where Tn is the duration of the interrogation radio pulses;

n is the number of objects located in the radio emission zone.

The readout radio pulse U ₁ (t) and the first interrogated radio pulse U _z1 (t) through the logic element And 43 and the duplexer 14 enter the transceiver antenna 15 and are emitted by it into the air. The first interrogation pulse U _z1 (t) is extracted by the first narrow-band filter 37.1 tuned to the frequency ω _z1 , and is detected by the first amplitude detector 38.1. The detected voltage is supplied to the control inputs of the keys 39.1 and 40.1, opening them. In the initial state, keys 39.1 and 40.1 are always closed. In this case, the readout radio pulse U ₁ (t) from the output of the transceiver antenna 8.1 through the public keys 39.1 and 40.1 is supplied to the piezoelectric crystal 9.1 with an aluminum thin-film IDT deposited on its surface.

The received reading radio pulse U ₁ (t) is converted by IDT into an acoustic wave, which propagates along the surface of piezocrystal 9.1, is reflected from a set of reflectors 12.1, and again IDT is converted into an electromagnetic signal with phase shift keying (FMN).

U ₂ (t) = V ₂ ⋅cos (ω ₁ t + ϕ _к1 (t) + ϕ ₁ ), 0≤t≤T ₁

where ϕ _k1 (t) = {0, π} is the manipulated component of the phase, displaying the law of phase manipulation in accordance with the topology of the interdigital transducer M ₁ (t), which determines the individual code of the object.

As an example in FIG. 1 shows a fragment of an individual object code M ₁ (t) = {101101001}.

The generated FMN signal U ₂ (t) is radiated by the microstrip transceiver antenna 8 into the ether, captured by the transceiver antenna 15 of the smart key 2, and through the duplexer 14 is fed to the input of the bandpass filters 16 and 22.

The tuning frequency ω _{n1 of the} band-pass filter 16 is chosen equal to ω ₁ .

ω _n1 = ω ₁

The tuning frequency ω _{n2 of the} bandpass filter 22 is selected equal to ω ₃ .

ω _n2 = ω ₃

Therefore, the FMN signal U ₂ (t) is allocated by a band-pass filter 16 and fed to the first (information) input of the phase detector 17, to the second (reference) input of which a high-frequency sounding oscillation U ₁ (t) is supplied from the output of the master oscillator 13. As a result of synchronous detection at the output of the phase detector 17 produces a low-frequency voltage

U _H1 (t) = V _H1 ⋅cosϕ _к1 (t), 0≤t≤T ₁

Where

proportional to the individual code M ₁ (t) of the object.

This voltage is supplied to the microcontroller 4.

The microcontroller 4 generates digital code information M _Σ (t), including the individual code M ₁ (t) of the object and the individual number M ₂ (t) of the SIM card key 2

M _Σ (t) = M ₁ (t) + M ₂ (t),

which is fed to the first input of the phase manipulator 20.

The high-frequency sounding oscillation U ₁ (t) from the output of the master oscillator 13 simultaneously enters the two inputs of the multiplier 18, at the output of which a harmonic oscillation is formed

U ₃ (t) = V ₃ ⋅cos (ω ₂ t + φ ₂ ), 0≤t≤T ₁

; ω₂=2ω₁; φ₂=2φ₁,Where

; ω ₂ = 2ω ₁ ; φ ₂ = 2φ ₁ ,

which is allocated by a narrow-band filter 19 and fed to the second input of the phase manipulator 20. At the output of the latter, a complex signal with phase shift keying (PSK) is formed

U ₄ (t) = V ₄ ⋅cos (ω ₂ t + ϕ _к2 (t) + ϕ ₂ ), 0≤t≤T ₁

where ϕ _k2 (t) = {0, π} is the manipulating component of the phase, which displays the law of phase manipulation in accordance with the total modulating code M _Σ1 (t), which through the power amplifier 21 and duplexer 14 enters the transceiver antenna 15, is radiated by it into ether at a frequency ω ₂ is captured by the transceiver antenna 26 of the control center 7 and through the duplexer 27 and the bandpass filter 28 is fed to the first (information) input of the phase detector 29. Harmonic oscillation from the output of the master oscillator is supplied to the second (reference) input of the phase detector 29 ora 30

U ₅ (t) = V ₅ ⋅cos (ω ₂ t + φ ₂ ), 0≤t≤T ₂ .

As a result of synchronous detection, a low-frequency voltage is generated at the output of the phase detector 29

U _H2 (t) = V _H2 ⋅cosφ _к2 (t), 0≤t≤T ₂ .

,Where

,

proportional to the total modulating code M _Σ1 (t),

which enters the computer 31. The personal computer 31 of the dispatch center 7 checks the received information for accuracy. If the information is reliable, the personal computer 31 decrypts the received information, displays to the dispatcher the name of the object and the identity of the subject receiving access, generates a modulating code

M _Σ1 (t) = M ₁ (t) + M ₂ (t),

which is fed to the first input of the phase manipulator 34.

The harmonic oscillation U ₅ (t) from the output of the master oscillator 30 simultaneously enters the two inputs of the multiplier 32, the output of which produces a harmonic oscillation

U ₆ (t) = V ₆ ⋅cos (ω ₃ t + φ ₃ ), 0≤t≤T ₂ ,

; ω₃=2ω₂; φ₃=2φ₂.Where

; ω ₃ = 2ω ₂ ; φ ₃ = 2φ ₂ .

This oscillation is distinguished by a narrow-band filter 33 and fed to the second input of the phase manipulator 34. At the output of the phase manipulator 34 a complex FMN signal is generated

U ₇ (t) = V ₇ ⋅cos [ω ₃ t + φ _К3 (t) + φ ₃ ], 0≤t≤T ₂ ,

where φ _K3 (t) = {0, π} is the manipulating component of the phase, which displays the law of phase manipulation in accordance with the modulating code M _Σ1 (t), which through the power amplifier 35 and duplexer 27 enters the transceiver antenna 26 and is broadcast by it at a frequency of ω ₃ , it is captured by the transceiver antenna 15 of the smart key 2 and, through the duplexer 14, is fed to the outputs of the bandpass filters 16 and 22. The FMN signal U ₇ (t) is extracted by the bandpass filter 22 and fed to the first (information) input of the phase detector 25.

Harmonic oscillation U ₃ (t), from the output of the narrow-band filter 19 simultaneously enters the two inputs of the multiplier 23, at the output of which a harmonic oscillation is formed

U ₈ (t) = V ₈ ⋅cos [ω ₃ t + φ ₃ ], 0≤t≤T ₂ ,

; ω₃=2ω₂; φ₃=2φ₂,Where

; ω ₃ = 2ω ₂ ; φ ₃ = 2φ ₂ ,

which is allocated by a narrow-band filter 24 and fed to the second (reference) input of the phase detector 25. As a result of synchronous detection, the output of the phase detector 25 produces a low-frequency voltage

_H3 U (t) = V _H3 ⋅cosφ _k3 (t), 0≤t≤T ₂

,Where

,

proportional to the modulating code M _Σ1 (t), which enters the microcontroller 4. If access to the object is authorized, then the microcontroller 4 lights up the LED 6.

Narrow-band filters 37.i of all blocks 36.i of access to IDT are tuned to frequencies ω _{zi of} interrogated radio pulses (i = 1, 2, ..., n). The duration T of each interrogation radio pulse _n is selected such that radio pulse reader formed U ₁ (t) code sequence M ₁ (t) would have managed to arrive at a fully intelligent key 2.

When the radiation of the read radio pulse U ₁ (t) and the first interrogated radio pulse U _s1 (t), the duplexer 14 is set to the transmission mode by a command from the third output of the synchronizer 41. After the transmission of these radio pulses after a time Δt, the duplexer 14 is transferred to the reception mode by command from the third output of the synchronizer 41.

Upon receipt of the first code sequence M ₁ (t) at the first input of the microcontroller 4. The latter through the synchronizer 41 issues a command to the carrier frequency synthesizer 42, which generates a second interrogation radio pulse U _z2 (t). In this case, the request radio pulse U _z2 (t) is allocated by the narrow-band filter 37.2 of the second IDT accessibility block 36.2. Further, everything happens, as in the previous case, and so on until all objects in the radio emission zone are read.

A distinctive feature of the identification tag is its small size and lack of power supply. The use of three frequencies ω ₁ , ω ₂ = 2ω ₁ , ω ₃ = 2ω ₂ provides a frequency isolation between objects, identifiers, smart keys and a dispatch center involved in the exchange of information.

Complex FMN signals have high energy and structural secrecy.

The energy secrecy of complex FMN signals is due to their high compressibility in time or spectrum with optimal processing, which reduces the instantaneous radiated power. As a result, a complex PSK signal at the receiving point may be masked by noise and interference. Moreover, the energy of the FMN signal is by no means small; it is simply distributed in 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 complex FMN signals is caused by a wide variety of their forms and significant ranges of parameter values, which makes it difficult to optimally or at least quasi-optimally process complex FMN signals of an a priori unknown structure in order to increase the sensitivity of the receiving device.

Complex 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 an increase in the reliability of reading individual codes simultaneously from several objects located in the radio emission zone. This is achieved by using query radio pulses U _z1 (t) and blocks 36.i accessibility to interdigital converters (IDT) (i = 1, 2, ..., n), which allow to interrogate sequentially in time all objects located in the radio emission zone. In this case, it is possible to organize the reception of signals reflected from various objects at different points in time.

In this case, the code sequences from various objects will not overlap and the individual code of each object located in the radio emission field will be read.

Claims (2)

1. A method of identifying a subject at a serviced object, based on the proximity or contact of an authorized access device located on the object and a smart key that reads information from the specified device, and the authorized access device on the object is an identifier with an individual code operating in the “request- answer ”, and the smart key is made on the basis of a GSM modem with a SIM card and an individual number, contains a microcontroller configured to read ind the visual number of the SIM card and an individual identifier code, as well as the transmission of these codes in the form of control code information to a dispatch center that makes decisions about the reliability or inaccuracy of the information received, in this case, the subject receives a light signal to the smart key LED, in the second - the identification process is repeated, the identifier with an individual code is performed in the form of a piezocrystal with a thin-film aluminum interdigital transducer deposited on its surface ers comprising two interdigitated electrode system, interconnected by buses, a set of reflectors and a microstrip antenna, formed a high frequency probing oscillation at carrier frequency ω ₁ are irradiated to them identifier capture high frequency probing oscillation microstrip antenna identifier, convert it into an acoustic wave, ensure dissemination along the surface of the piezocrystal and back reflection, convert the reflected acoustic wave into an electromagnetic signal with phase shift keying minutes, the internal structure of which is determined by the structure of an interdigital transducer and corresponds to the individual code emit it in the air at a frequency ω _1, catch transceiver antenna reader, carried out synchronous detection of the electromagnetic signal with phase shift keying using a high frequency probe oscillations at a frequency ω ₁ as the reference voltage, emit a low-frequency voltage proportional to the individual code, and direct it to the microcontroller, with which th form control code information, dual phase high-frequency probe oscillations isolated harmonic oscillation with a frequency ω ₂ = 2ω _1, manipulate its phase-control code information, thereby forming a complex signal with phase shift keying, emit its broadcast at frequency ω _2, catch transceiver antenna of the control center, carry out synchronous detection of a complex signal with phase shift keying using harmonic oscillation at a frequency of ω ₂ as a reference voltage, you divide the low-frequency voltage proportional to the control code information, check it with a computer for reliability, if the control code information is reliable, then decode the received information indicating the name of the object and the identity of the subject receiving access, form its individual code, double the phase of harmonic oscillation at the frequency ω ₂ , emit harmonic oscillation with frequency ω ₃ = 2ω ₂ , manipulate it in phase with the individual code of the subject, thereby forming a complex signal al with phase shift keying, radiate it on the air at frequency ω ₃ , pick up the transceiver antenna of the smart key, synchronously detect a complex signal with phase shift keying using harmonic oscillation at frequency ω ₃ as a reference voltage, isolate a low-frequency voltage proportional to the individual code of the subject, and direct it to the microcontroller, characterized in that in the smart key reader n request radio pulses are generated, where n is greater than or equal to ETS objects simultaneously in to radio waves the area, at each predetermined time interval Δt, sufficient to read individual code with each identifier, radiate probing oscillation at carrier frequency ω ₁ and one of the interrogation radio pulses at the frequency ω _zi where i = 1, 2, ..., n, each identifier is equipped with accessibility blocks for the interdigital transducer tuned to the frequency ω _{zi of} one of the request radio pulses, and the individual codes of all identifiers are read out sequentially in time Orov located in the radio emission zone. 2. A device for identifying a subject at a serving facility, comprising an identifier located on the facility, an intelligent key supplied with the subject, and a dispatch center, the identifier being made in the form of a transceiver antenna and a piezoelectric crystal with a thin-film aluminum interdigital transducer deposited on its surface, containing two comb electrode systems interconnected by buses, and a set of reflectors, the smart key contains a master oscillator connected in series OP, the first multiplier, the second input of which is connected to the output of the master oscillator, the first narrow-band filter, a phase manipulator, the second input of which is connected to the second output of the microcontroller, a power amplifier, a duplexer, the input-output of which is connected to the transceiver antenna, the first band-pass filter, the first phase a detector, the second input of which is connected to the output of the master oscillator, a microcontroller and an LED, connected in series to the output of the first narrow-band filter, a second multiplier, a second input It is connected to the output of the first narrow-band filter, the second narrow-band filter and the second phase detector, the second input of which is connected to the output of the duplexer through the second band-pass filter, and the output is connected to the input of the microcontroller, the control center contains serially connected master oscillator, multiplier, the second input of which is connected to output of the master oscillator, narrow-band filter, phase manipulator, power amplifier, duplexer, the input-output of which is connected to the transceiver antenna, band-pass filter, ph a new detector, the second input of which is connected to the output of the master oscillator, and a computer, the output of which is connected to the second input of the phase manipulator, characterized in that the identifiers are equipped with n blocks of accessibility to the interdigital converter, where n is greater than or equal to the number of objects in the zone radio exposure, each access unit to the interdigital transducer consists of a narrow-band filter, an amplitude detector and two keys connected in series to a transceiver antenna between the transceiver antenna and the buses of the interdigital transducer, respectively, the smart key is equipped with a carrier frequency synchronizer and a logical element And, moreover, a synchronizer, a master oscillator and a logical element And, the second input of which is connected to the second output of the synchronizer through a carrier frequency synthesizer , and the output is connected to the second input of the duplexer, the third input of which is connected to the third output of the synchronizer.

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