RU51766U1 - REMOTE CONTROL UNIT FOR ANALOGUE RADAR STATIONS - Google Patents

Abstract

This technical solution relates to the field of digital computing, namely, to automated systems for processing radar information. The remote interface unit (P910 unit) is intended for use as an external interface unit with analog radar stations (RLS) as part of the primary radar information processing complex (RRL). The P910 block provides:

- the conversion of the echo signals and general recognition signals arriving at it from the radar or a mobile radio altimeter (PRV) into digital form and determining the range of the primary marks;

- conversion of the signals of the sync sensors of the synchronous servo drive (SSP) of the radar antenna rotation (PRV) into the antenna azimuth code;

- transfer of the current azimuth, elevation sine (when working with PRV) and the range of primary radar marks to the control center via a high-frequency communication line;

- receiving from the control panel and issuing to the ground-based radio interrogator (NRZ) control commands for common recognition modes (general and guaranteed recognition, control request);

- reception of control commands from the control panel of the antenna rotation of the PRV and issuing to the PRV signals of the mismatch of the azimuth of the antenna of the PRV through the coarse reference circuit (GO) and the exact reference (TO).

The unit has the following specifications:

- discreteness of azimuth determination - 5.4 min;

- discreteness in range - 100, 150, 200, 300,400 or 600 m, processing radius - 50, 75, 100, 150, 200 or 300 km, respectively;

- transmission rate on the communication line - 1 Mbit / s.

Description

Technical field

This technical solution relates to the field of digital computing, namely, to automated systems for processing radar information.

State of the art

An analog of this technical solution is a remote unit for interfacing with an analog radar station (see AUTOMATED WORK PLACE OF THE AIR TRAFFIC OPERATOR, Utility Model Certificate RU 23998 U1, application 2001128364 dated 10.23.2001, published on July 20, 2002, bull. twenty). Automated workstation of an air traffic control operator, consisting of a specialized electronic computer (COMPUTER) compatible with an IBM PC, containing a system unit with a set of standard modules, a monitor, a keyboard, a ball manipulator, as well as additional mathematical accelerator (MA) module, an adapter module local area network (LAN), a module for interfacing with tank navigation equipment (TNA) and a communication channel of an automated data transmission system (ASPD-U), the first inputs and outputs of which x connected to the ISA bus of the system unit of a specialized computer, and the second inputs of the adapter module of the local area network with the first

the inputs and outputs of the device, the input, the second and third inputs and outputs of the TNA and ASPD-U interface module are connected respectively to the first input and the second and third inputs and outputs of the device, multi-channel data transmission equipment (MAPD), the first input-output of which is connected to the RS-232C input-output of a specialized computer system unit, and the second inputs and outputs with the fourth device inputs and outputs, a telegraph channel adapter module, the first input-output of which is connected to the RS-232C system input-output of a specialized computer system unit, and the second input-output with fourth inputs and outputs of the device, characterized in that the workstation further comprises first and second remote interface units with a radar station and a mobile radio altimeter (PRV), the inputs of which are connected respectively to the fifth and sixth inputs of the device, module interfaces with remote units, the first input-output of which is connected to the second input-output of the mathematical accelerator module, and the second and third input-output with inputs and outputs of the first and second ynosnyh interfacing units with radar.

The disadvantage of this analogue is the limited functionality.

The closest analogue (prototype) of the claimed technical solution is a remote unit for interfacing with analog radar stations (see UNIFIED MOBILE COMMANDER ITEM, Utility Model Certificate RU 29600 U1, application 2002129461 dated 04.11.2002, published on 05.20.2003, bull. No. 14)

The unified mobile command post contains the first Baguette 21-02 system unit consisting of a BT01-209 central processing unit (CPU), a BT01-301A hard disk drive (HDD), a BT01-404A RS-232 controller and a local area network adapter (LAN) BT01-411, connected by ISA bus, the second Baguette 21-02 system unit, consisting of a BT01-209 central processing unit (CPU), a BT01-301 A hard disk drive, and a mathematical accelerator module (MA) ) BT01-206, BT01-411 LAN adapter, connected by ISA bus, the first and second unified e workstation (UARM-1), consisting of each of the VMTSM-21.3 video monitor, KL-85 keyboard and trackball connected respectively to the “SVGA”, “Keyboard” inputs and the first “RS-232” input of the BT01-209 central processors of the first and the second system blocks “Baguette 21-02”, respectively, a remote workstation (WARM) based on

"Baget-41" electronic computer (BTM) with BT41-400 and BT41-040 modules, inputs and outputs of BT01-411 LAN adapters of the first and second Baget 21-02 system units and remote workstation are integrated into a local area network (LAN) ) Ethernet, characterized in that it additionally contains in the first Baguette 21-02 system unit an adapter for tank navigation equipment (TNA) and data transmission equipment (ADF) such as BR21-407 unified data acquisition and transmission equipment (ASPDU) connected to the bus ISA, in the second system unit "Baguette 21-02" the adapter of the interface unit with BR21-410 radar station (BS RLS) and the T-235-1L BR21-413 APD adapter connected to the ISA bus, the SN-3001 navigation receiver connected to the second RS-232 input of the central processor of the first system unit Baguette 21- 02 ", TNA-4-6 navigation equipment connected to the BRA-407 module" TNA adapter "input, a UD-M211D printing device connected to the Centronics input of the BT01-209 central processor of the second Baguette 21-02 system unit.

The disadvantage of the prototype is limited functionality.

Utility Model Essence

The known remote unit for interfacing with analog radar stations contains five modules of the first level: the first module EM1 P910.01 of a reference voltage generator of 36 V, a frequency of 400 Hz and an amplifier of control signals of a synchronous servo-drive (CSP) of a mobile radio altimeter (PRV), the second module EM1 P910 .02 power supply control and monitoring unit, the third module of the EM1 R910.03 converter of three-phase signals of the joint venture to the azimuth code, the fourth module EM1 R910.04 of analog-to-digital converters (ADC) of the azimuth code and the sine of the elevation angle of the antenna of the PRV, fifth the module EM1 R910.05 of the echo signal transducer, transceiver and command register of the terrestrial radio interrogator (NRZ), as well as the module of the MDM15-1V05M +5 V voltage source and three modules of the MDM15-1V15M +15 V voltage sources, minus 15 V and +30 V whose inputs are connected to a voltage of +27 V, and the outputs with nodes of the second, third, fourth and fifth modules of the first level.

The purpose of this technical solution is to expand the functionality of interfacing with radar stations and a mobile radio altimeter, the implementation in the form of a wearable unit of minimum size and power consumption.

To obtain this technical result, in a remote unit, the third and fourth modules of the first level EM1 R910.03 and EM1 R910.04 contain an RGS status register, the input of which is connected to the STATE input from a radar station, an analog-to-digital coarse voltage converter ) and the exact reference (TO) to the ADC azimuth code, the first input of which is connected to the U support output, and the second and third input respectively to the outputs of the coarse (GO) and accurate (TO) readings from the radar, analog-to-digital converter of the sine of the elevation angle of the ADC SUM , entrance otorozhno connected to the output of U * sinε PRV, the register RG, the first (D) input of which is connected to the outputs of the register RGS (signal SS), ADC (signal code β) and ADC SUM (signal code sinε), and the second input (C) - with an output of clock pulses TI PRD 500 kHz, register for setting the azimuth of PRV RGA, adder for highlighting the difference between the current azimuth and azimuth of the installation of PRV SM, the first input of which is connected to the output of ADC A, and the second input is with the output of RGA, digital-to-analog azimuth mismatch converter DAC, the input of which is connected to the output of the adder CM, and the outputs GO and TO - with the inputs PRV, the azimuth code conversion circuit implemented on the third and fourth modules of the first level, contains X / Y converters of three-phase voltage of the synchro sensors to voltage proportional to sinβ and cosβ for coarse (GO) and accurate (TO) readout signals, connected respectively to the outputs 1, 2, 3 Phases GO and Phases TO the radar, azimuth code counter GO ST2 and the azimuth code counter GO x36, the inputs of which are connected respectively to the outputs +1 and -1 of the radar and the azimuth code (GO) of the radar, and the first outputs respectively to the outputs Azimuth Code (GO) and Device Maintenance Code, switch voltage regulators sinβ, cosβ GO K1 and sinβ, cosβ TO K2, two inputs of which are connected respectively to two outputs sinβ and cosβ of the X / Y GO and TO transducers, and the third inputs are connected to the second outputs of the azimuth meters GO and TO, two correction adders azimuth code SMK GO and SMK TO, two inputs of which are connected respectively to the first outputs of the azimuth code counters GO and TO and correction inputs Corr. GO and Corr. Device maintenance, two differential amplifiers ДУ GO and ДУ ТО, the inputs of which are connected respectively to the outputs of sinβ / cosβ of the voltage switches sinβ, cosβ GO K1 and sinβ, cosβ TO K2, two digital-to-analog converters DAC GO and DAC TO, the inputs of which are connected respectively with the outputs of the azimuth correction code adders SMK GO and SMK TO, and the outputs, respectively, with the second inputs of the differential amplifiers DU GO and DU TO, a comparator, two inputs of which are connected to the output of the differential amplifier DU GO and DU GO and the signal threshold threshold GO, switch si catch the GO / TO K3, three errors

the input of which is connected respectively to the outputs of the differential amplifier DU GO, the differential amplifier DU TO and the comparator, a voltage / frequency converter U / F, the input of which is connected to the output of the switch of error signals GO / TO K3, and the output - with signal circuits + 1, -1 devices, the fifth module of the first level EM1 R910.05 contains an analog-to-digital converter of the echo signal of the ADC ECHO, the input of which is connected to the output of the ECHO radar, a comparison circuit, two inputs of which are connected respectively to the outputs of the OPOZN and U cut-off radars, the distance meter ra radar detector (RLI), the distance meter of the transmitter СчD1, two inputs of which are connected respectively to the outputs of the clock pulses of the TI radar station 750 kHz and the output of the start pulse of the IZ, the distance meter of the transmitter, the distance meter of the radar station СчD2, the two inputs of which are connected respectively to the outputs of the radar and TI PRD 500 kHz, dual-port random access memory (RAM) RAM, the four inputs of which are connected respectively to the ADC of the ECHO by the signal of the target mark (OC), the comparison circuit by the signal of the general recognition (OP), the counter ScD1 by the signal of the RECORDING address and count the SCh2 sensor by the READING ADDRESS signal, the transmitter, the two inputs of which are connected respectively to the output of the dual-port random access memory and the output of the RG register, the output transformer T1.2, the inputs of which are connected to the outputs of the transmitter of the receiver, and the output is connected to the LAN communication line, input transformer T1.1, the input of which is connected to the LAN communication line, the PFP receiver, the inputs of which are connected to the output of the T1.1 transformer, and the output is connected to the input of the RGA register, the command register of the Republic of Kazakhstan, the input of which is connected to the output of the PFP receiver, the relay unit, the input of which Go is connected to the output of the command register, and the output is connected to the NRZ MODE circuit.

List of figures, drawings and other materials

Figure 1 shows the structural diagram of a remote unit for interfacing with analog radar stations.

Figure 2 shows the structural diagram of the Converter azimuth code.

Figure 3 shows a General view of the remote unit pairing.

Figure 4 shows a General view of the front panel of the remote interface unit.

Figure 5 shows the timing diagram of the multiplex channel.

An example embodiment of the device

The REMOTE CONTROL UNIT WITH ANALOGUE RADAR STATIONS (Fig. 1) contains an electronic module EM1 P910.01 (reference voltage generator) 1, electronic module EM1 P910.02 (power control module) 2, electronic module EM1 P910.03 3, electronic module EM1 Р910.04 4, electronic module ЭМ1 Р910.05 5 and power modules МДМ12 6. Electronic modules ЭМ1 Р910.03 3 and ЭМ1 Р910.04 4 contain a status register РГС 7, an analog-to-digital converter of coarse and exact voltage readings in the ADC azimuth code 8, analog-to-digital converter sine angle elevation ADC SUM 9, register RG 10, register for setting the azimuth of PRV 11, an adder for distinguishing the difference between the current azimuth and azimuth of the installation of PRV 12, a digital-to-analog converter for mismatching the azimuth of the DAC 13. Electronic module EM1 R910.05 5 contains an analog-to-digital converter of the echo signal of the ADC ECHO 14, comparison diagram 15, RLK distance counter / transmitter distance counter СЧД1 16, transmitter distance meter / radar distance counter СЧД2 17, RAM 18 dual-port random access memory (RAM), PRD 19 transmitter, T1.2 20 output transformer, input trans formatter T1.1 21, receiver PFP 22, command register RK 23, relay block 24

The circuit of the azimuth code converter (Fig. 2) contains converters of three-phase voltages of selsyn sensors to voltages (proportional to sinβ and cosβ) Usinβ, Ucosβ 25, 34, azimuth code counter GO 26 and TO 35, voltage switch sin, cos GO 27 and sin, cos TO 36 (depending on the azimuth quadrant), GO 28 and TO 37 azimuth correction code adder, GO 29 and TO 38 differential amplifier, GO 30 and TO 39 digital-to-analog converter, comparator (circuit for comparing the GO channel error with a threshold voltage) 31, switch of error signals GO / TO 32, voltage-frequency converter 33.

Description and operation of the unit

Appointment and technical characteristics

The remote interface unit (P910 unit) is intended for use as an external interface unit with analog radar stations (RLS) as part of the primary radar information processing complex (RRL).

The structure of the complex, in addition to the unit, includes a set of cables for interfacing with a radar or a mobile radio altimeter (PRV), a high-frequency cable for communicating with

control center (PU) up to 200 m long, an automated workstation for a PU operator (AWS) equipped with a Baguette-type computer with the BR21-410 and BT01-206 modules installed in it (Baget mathematical computer accelerator). The BR21-410 module provides data exchange with two P910 blocks, partial processing of the received radar data and its delivery to the mathematical accelerator.

The P910 block provides:

a) the conversion of the echo signals and general recognition signals arriving at it from the radar or PRV into digital form and determining the range of the primary marks;

b) converting the signals of the synchro sensors of the synchronous servo drive (BSS) of the radar antenna rotation (PRS) into the antenna azimuth code;

c) the transmission of the current azimuth, elevation sine (when working with PRV) and the range of the primary radar marks to the control center via a high-frequency communication line;

d) receiving from the control panel and issuing to the ground-based radio interrogator (NRZ) control commands for common identification modes (general and guaranteed recognition, control request);

e) receiving control commands from the control panel of the antenna spread of the PDS and issuing to the PDS signals of the mismatch of the azimuth of the antenna of the PDS along the coarse reference circuit (GO) and the exact reference (TO).

The unit has the following specifications:

a) discreteness of azimuth determination - 5.4 min;

b) range discreteness - 100, 150, 200, 300, 400 or 600 m, processing radius - 50, 75, 100, 150, 200 or 300 km, respectively;

c) the transmission rate on the communication line is 1 Mbps.

The functioning of the unit is provided upon receipt of signals at its inputs, the parameters of which are given in the table.

Table Signal Amplitude, V Duration, μs frequency Hz OF 10 to 30 0.6 to 6 - Echo 1.5 to 8 0.6 to 6 - U _f MSP 12 to 18 - 400

The power supply voltage of the unit is (27 plus 3, minus 4) V, power consumption - no more than 25 watts.

The unit provides outdoor operation at ambient temperatures from minus 50 to plus 50 ° C.

The mean time between failures is at least 10,000 hours.

Block composition

A general view of the block P910 is shown in Fig.3. The following electronic modules of the first level are installed in the block:

- EM1 R910.01 (1) - a generator of a reference voltage of 36 V, a frequency of 400 Hz and an amplifier of control signals SSP PRV;

- ЭМ1 Р910.03 (3) - converter of three-phase SSP signals to azimuth code;

- EM1 R910.04 (4) - ADC of the azimuth code, ADC of the sine of the elevation angle of the antenna PRV;

- EM1 R910.05 (5) - echo signal transducer, transceiver, NRZ command register;

- EM1 R910.02 (2) - control module and power supply control unit.

As sources of secondary voltage in the P910 block, MDM modules are used located on the back side of the front panel of the P910 block:

- module MDM15-1V05M (A8) - voltage source +5 V;

- MDM15-1V15M modules (A9-A11) - voltage sources +15, minus 15, +30 V.

On the front panel of the unit there are controls and control, as well as connectors for connecting cables to the radar (PRV) and high-frequency cable communication lines with PU. A general view of the control panel of the unit is shown in Fig.4.

Unit design and operation

The block diagram is shown in figure 1.

The structure includes the following functional units:

- ADC ECHO - analog-to-digital converter of the echo signal 14;

- SChD 1 - radar distance counter / transmitter distance counter 16;

- СЧД 2 - transmitter distance meter / radar distance meter 17;

- RAM - dual-port random access memory 18;

- PRD - transmitter 19;

- GON - reference voltage generator for MSS radar antenna 1;

- ADC A - voltage converter GO, TO to azimuth code 8;

- ADC SUM - ADC of the sine of elevation 9;

- CWG - state register of block 7;

- PFP - receiver 22;

- RGA - register of azimuth setting PRV 11;

- CM - adder allocation of the difference between the current azimuth and the azimuth of the installation PRV 12;

- DAC - digital analog converter mismatch azimuth 13;

- RK - register of teams 23;

From the radar or PRV to the block inputs are triggered pulses (FROM), an echo signal (ECHO), an identification signal and three-phase voltage from the selsyn sensors of coarse and accurate readout. An alternating voltage U * sinε (sine of elevation angle - SUM) also comes from the elevation sensor of the PRV.

The block echo transformer converts the input analog signal into a five-digit code proportional to the input signal power on a discrete distance segment δD, determines the average noise level (cutoff level) on the distance segment ± 8 δD relative to the echo signal, and selects signals exceeding this level as Estimated target marks (OC).

The selected features of the OTs are written to dual-port RAM, which allows writing and reading data at the same time. The address of the RAM cell during recording corresponds to the distance of the OTs and is formed using a binary counter (CT2), which counts the discrete values of the distance.

A transmitter bit counter is connected to the read input address of this RAM. When transmitting, the contents of RAM cells from the beginning to the end of the distance are sequentially issued to the transmitter and then to the communication line.

The block angle-code converter (modules P910.03, P910.04) converts a three-phase alternating voltage of the coarse and accurate sensors of the coarse and accurate readout of the SSP (GO, TO) radar antenna (PRV) into a twelve-digit azimuth code. The azimuth correction input scheme allows you to compensate for errors that occur due to inaccurate installation of radar sensor stators or incorrect phase sequence. Correction is introduced during initial pairing with the radar using the RESET and CORR buttons. unit and is saved when the unit is powered off.

When working with the PRV, an alternating voltage is also input to the block input, proportional to the sine of the elevation axis of the PRV antenna axis, which is converted using the ADC SUM into a ten-digit code.

The block simulator provides in the block control mode a simulation of 16 marks moving along the radii to the center of the overview indicator screen.

The data transfer cycle from the P910 unit to the BR21-410 PU module is synchronized by radar launch pulses. Data transfer begins 80 μs after recording 256 range samples in RAM.

The timing diagram of the multiplex channel is shown in Fig.5.

The first is the status word of the P910 block and NRZ, then the azimuth, sine of the elevation angle of the PRV antenna and 63 or 94 words of the radar data (range 504 or 752).

After transmitting the last word of the data by the signal from the transmitter word counter to the communication line, the “K” command is issued, which serves as a sign of the end of the transmission cycle of the P910 unit and allows the response word from the BR21-410 module to be issued. The command differs from the data in the polarity of the clock pulses.

Data is transmitted over the LAN at a speed of 1 Mbit / s in the Manchester II code with words of 16 bits in length, one after the other. Each word begins with a three-clock sync signal and ends with an odd parity bit (17th bit).

The data from the parallel registers of the CWG, the azimuth register and the register of the SMS are converted into a serial code using the shift register of the WG SDV, to the clock input of which the clock pulses of the transmitter are received.

Signs of the target mark (OC) and the common identification signal (OP) are transmitted to the transmitter directly from the RAM (through the OC / OP switch) as the cells with addresses from zero to the end of the distance are read. The bits of the OTs are transmitted in odd clocks, bits of OP - in even.

Switching inputs 1 and 2 of the transmitter is a word counter after transmitting the first three words.

When receiving data from the control unit, the receiver in each cycle receives two words - the command and the data. The control command received from the control unit for the modes of the block and NRH is recorded and stored in the register of commands of the Republic of Kazakhstan. The control signals of the NRZ modes are issued to the NRZ through the relay block in the form of signals with a voltage of 27 V.

The command for setting the azimuth of the PRV is transmitted by a sequential code to the P910.04 module, where it is written to the register of the azimuth of the PRV, from where it is issued to the adder CMA for comparison with the current azimuth of the PRV. The difference of the codes from the output of the SMA is converted to the DAC GO, THEN into analog mismatch signals with a frequency of 400 Hz, which are transmitted through amplifiers with a transformer output to the inputs of the SSP antenna of the PRV.

To provide autonomous control of the transmit-receive channel, a loop mode is provided in the block. In this mode, the transmitter of the block transmits, and the receiver receives two words, the first of which is written to the register of the bearing azimuth of the PRV, and the second to the register of commands. When the P910.05 module is working properly, the front-end indicator (reception) lights up on the front panel of the unit. Received data is monitored by single indicators "1-10".

To ensure autonomous control of the azimuth code converter and the echo signal processing channel, the unit provides simulation modes of rotation and echo signal, which are set either by commands from the control unit or by setting a jumper between the "0 V" sockets and the IMIT unit. In this mode, when the unit switch is set to GO, the uniformly increasing binary azimuth code is displayed on the indicators "1" - "10" of the unit.

If there are no start pulses from the radar at the input of the block, the block switches to the simulation mode FROM the frequency of 365 Hz automatically.

Component work

Echo and recognition transducer

The echo signal from the radar is fed to the input amplifier-rectifier and a low-pass filter assembled on an operational amplifier.

The signal from the LPF output is subtracted from the input echo. In this way, the constant or low frequency components of the echo are suppressed. The voltage difference is rectified by a half-wave rectifier. The ADC measures the amplitude of the input signal with a clock frequency of 0.75 to 6 MHz, depending on the set resolution. The amplitude of the radar input signal within a small range can be adjusted by a potentiometer.

Codes of the input signal are sent for further processing to a programmable logic integrated circuit (FPGA), where, using a digital filter, a signal of the estimated target mark (OC) is extracted from the signal-to-noise mixture. The selected “OTs” signals are recorded in the FPGA RAM, from where they are then transmitted through the transmitter to the communication line with the control panel after each radar start pulse.

The recognition signal is transmitted to the FPGA through a comparator with a fixed level of signal cutoff.

Transceiver

The EM1 P910.05 transceiver is located in FPGA D6. The azimuth and sine of the elevation angle from the P910.04 module are transmitted to the transmitter via the “KOD AZ” circuit upon request by the signals “PP AZ” and “PP SIN” EM1 P910.05, respectively. The issuance of serial codes with EM1 P910.04 is synchronized by the clock pulses of the TI PRD transmitter.

From the FPGA output, the transmitter signals enter the communication line through the transmitting chip 588BA2, keys 169AA1 and transformer T1. Resistors R37-R39 are used to coordinate with the communication line.

The signal received from the communication line is fed through a transformer T2 to the 588BA3 limiting amplifier, which limits the input signal to a level of ± 1.2 V. The 588BA2 chip converts a bipolar signal into a bi-pulse signal, which is fed to the FPGA inputs VL0, VL1.

When receiving the command for setting the azimuth of the PRV, the azimuth code is sequentially issued to the P910.04 module via the "D PFP" circuit accompanied by the "TI PFP" clock pulses. Upon termination of reception of the word from FPGA to EM1 P910.04, the write impulse "ЗЗ АЗ" is issued, according to which the azimuth code is copied in Р910.04 to the azimuth register PRV.

Upon receipt of the control command of the NRZ, the signals of the control of the NRZ modes are recorded on the command register of the P910.05 module (FPGA) and issued from it through the keys D9, D10 to the control relays K1-K4.

When receiving any codogram from the FPGA, the reception indication signal "IND. PRM" is issued, which turns on the corresponding indicator on the front panel of the unit. The signal is reset at the end of the block transfer cycle.

Transistors VT3, VT4 are used as a pulse amplifier of a target designation marker for range (MD) for PRV.

The D9 chip is used to store and load FPGA programs (circuits) into the FPGA. FPGA loading occurs at the moment of module power-up. Download time is approximately 10 ms.

Azimuth code converter

The azimuth code converter is located in the modules P910.03, P910.04. The block diagram of the Converter is shown in figure 2. At the bottom of the graphical notation of the functional units, the type EM1 (03 or 04) in which they are located is abbreviated.

Three-phase voltages from the synchro sensors of coarse and accurate reference (TO, TO) of the azimuthal position of the radar antenna (PRV) are fed to the input of the converter. A twelve-digit binary antenna azimuth code is generated at the output of the CT2 binary counter. The counter readings increase or decrease, depending on the mismatch signal between the voltage from the output of the DAC connected to the output of the meter and the current signal voltage sinβ or cosβ.

One of the phases of three-phase voltages is taken as the voltage U * cosβ. The voltage U * sinβ is obtained as the difference between the vectors of the phases 2 and 3. The addition of phases is carried out on operational amplifiers (op amps) EM1 P910.03.

Depending on the value of the three high-order bits of the CT2 counter, one of the signals ± U * sin (0-45) ° or ± U * cos (45-90) is supplied to the circuit for comparing the “GO” and “TO” signals through the switch K1 (K2) ) °. The second input of the comparison circuits receives signals from the outputs of the ADC GO and TO.

The reference voltage of the DAC (OP GO, OP TO) is formed as the sum

± 0.29U * sin (0-45) ° ± 0.71U * cos (0-45) ° or

± 0.71U * sin (45-90) ° ± 0.29U * cos (45-90) °.

Variable voltages of the mismatch between GO and MOT are supplied to phase detectors, the second input of which is supplied with the reference voltage of MOT and MOT, respectively. In the phase detector, the mismatch voltage is rectified taking into account its phase relative to the phase of the reference voltage.

Depending on the magnitude of the GO error, the voltage / frequency converter - "U / F" receives a mismatch signal from the K3 comparison circuit (with a large mismatch) or TO through the K3 switch. The channel switching threshold GO-TO is set on the COMP comparator.

Depending on the sign of the error, pulses "+1" or "-1" are formed at the output of the converter, which are fed to the inputs of the CT2 counter.

Since the gear ratio between selsins GO and TO the radar is 1:36 (for PRV - 1:23), the azimuth code from the counter ST2 to the DAC TO comes through the code multiplier. The coefficient 1:23 is set by the signal “1:23” (0 V) from the MTP connector of the unit automatically when connecting the interface cable with the PRV.

QMS correction adders are used to provide the opportunity to correct the azimuth code error caused by the inaccurate installation of radar antenna sensors on the radar antenna or the incorrect order of connection of the phases of the sensor sensors.

The correction code is defined as the code at the output of the GO or TO channel when the radar antenna is set to zero on the scale (to the north). The first time you connect to the radar (PRV), this code using the RESET and CORR buttons. It is written into the non-volatile RAM EM1 P910.04, whence it is in operation mode and is fed to the correction adders QMS GO and QMS TO.

Converters of the three-phase voltage GO, TO to voltages proportional to the sine and cosine of the azimuth are assembled at the op amp D1, D2 EM1 P910.03. From the output of the voltage converter ГО U * sinβ or U * cosβ enter through the switch D5, D8 to the comparison circuit D7.1, D7.3, where they are compared with the voltage "U ГО" coming from the DAC of the azimuth counter ЭМ1 Р910.04. From the same switch, through the resistors R45, R47, the voltage is removed to power the DAC GO EM1 P910.04 (chip D12 P910.04) and the signal "DF" that determines the phase of the reference voltage for the GO circuit.

The operation of the switch is controlled by the signals of the three most significant bits of the azimuth counter (GO [1], GO [2], GO [3]). The signal "KGO [0]", coming from the ZNAK GO toggle switch, serves to change the direction of the azimuth reference in case of incorrect phase rotation of the selsyn GO at the module input.

The error signal (mismatch) from the comparison circuit is rectified on a phase detector D10.1, D10.2 P910.03 taking into account the phase of the reference voltage GO (OH GO). The maintenance channel works similarly. The logical signal of the reference voltage GO is formed from the input signal "OH" using the comparator D15 EM1 P910.03.

Error signals of the channels GO ("SGO") and TO ("STO") arrive at the switch D22.1, D22.2. The operation of the switch is controlled by the comparator D13, D14, which allows the passage of the signal "CGO" only with a large mismatch on the channel GO. In addition, it is possible to control the passage of GO or TO signals through the switch using the signals “OFF TO”, “OFF GO”, coming from the control panel of the unit in the “1K” operating mode (one channel).

Through the smoothing filter D12.4 and key D11.3, the error signal is fed to the integrator D12.1, to the output of which the comparators D16, D17 are connected. Even with a small error signal, the voltage at the output of the integrator begins to increase, while one of the comparators is triggered (depending on the sign of the error). A trigger D21.1 or D21.2 is triggered along the edge of the clock signal. The signal from the output of the trigger opens the key D11.1, through which the capacitor C20 of the integrator is discharged, and the voltage at the output of the integrator drops to zero. In the next clock, trigger D21 is reset and the process repeats. The pulses from the outputs of the trigger D21 are fed to the counting inputs "+1" or "-1" of the azimuth counter of the P910.04 module, depending on the sign of the mismatch.

The code for correcting the GO and TO readings received at the outputs of the azimuth counter and multiplier during block alignment is recorded in the reprogrammable memory D28 (ППЗУ) ЭМ1 Р910.04. Before recording, the old EPROM data must be erased by pressing the RESET button of the block (signal "RESET"). In this case, the FPGA of the module generates a “PRG” signal, which for one second allows the output of a 25 V programming voltage from the voltage regulator D27 to the PRG input of the EPROM. At the same time, a logical unit signal is output to the input “CE” of the EPROM, and the signal remains zero at the input “OE” (erase mode), while the correction code is reset.

When the CORR button is pressed. the signal “CORR. GO” or “CORR. TO” is sent to the module, depending on the position of the GO or TO switch of the unit. Based on these signals, the FPGA transfers the EPROM to the recording mode (the signals "CE", "OE" are equal to unity) and opens the programming voltage stabilizer for 10 ms. The code recorded in the EPROM (GO or TO) before recording is controlled by the indicators "1" - "8" of the block. After entering the correction, the azimuth code on the indicators should become equal to zero.

PDV control scheme

When controlling the PRV, the azimuth code received from the control unit by the serial code is recorded in the EM1 register P910.04 (in the FPGA) and then compared (also in the FPGA) with the current azimuth code of the PRV. The difference code is issued on the DACs D14 (GO), D15 (TO) EM1 P910.04. As a reference voltage to the DAC through the voltage divider and phase switch D5.1, D10.1, D5.2 receives the reference voltage of the sync PRV. The phase of the reference voltage is switched by the signal of the error sign of the error between the current and the given azimuth. From the outputs of the DAC, the alternating voltage of the mismatch between the GO and the TO goes to the power amplifiers of the P910.01 module.

The mismatch voltage on the GO channel reaches a maximum when the mismatch is 45 degrees or more (up to 180), on the MOT channel - when the mismatch is more than 5, 6 degrees.

ADC sine elevation

The ADC of the elevation sine is located in the P910.04 module. The ADC includes a binary counter (in the FPGA), a rectifier for the reference voltage SKVT (D19.1, D19.2), a digital-to-analog converter (D22, D23.1), a voltage rectifier SUM (D18.1, D18.2), and a converter " voltage-frequency "(D10.1, D23.1, D25, D26, D24.3, D24.4). The current value of the SUM is compared with the signal at the output of the DAC and, depending on the sign of the error signal, the voltage-frequency converter gives pulses to the input "+1" or "-1" of the counter.

ADC adjustment is carried out by adjusting the voltage level of the SUM potentiometer KORR. unit when installing the PRV antenna at an elevation angle of 23 ° or 30 °.

When the elevation angle is set above 33 ° (with the SUM code above 0100011111), the CHP indicator on the unit lights up - a signal of incorrect operation.

Reference Voltage Generator

The reference voltage generator is located in the P910.01 module and is assembled in a push-pull circuit with self-excitation on transistors VT2, VT3 and transformer T1. Rectangular pulses with an amplitude of (40 ± 6) V and a frequency of 400 Hz are removed from the secondary winding of the transformer.

Load current - up to 100 mA. Transistor VT1 is used to start the generator at the time of power-up.

The transformer T2 is used to obtain a reference voltage of 36 V for the azimuth converter circuit when working with PRV-16.

Mismatch Amplifiers

The amplifiers of the mismatch signals of the azimuth of the PRV are assembled on the operational amplifier 140UD20A D1 EM1 R910.01. The outputs of the op-amp through power (current) amplifiers on transistor pairs VT4, VT5 and VT6, VT7 are connected to output step-up transformers T2, T3. The voltages at the outputs "UPR. GO", "UPR. TO" depending on the mismatch vary from zero to 100 V.

Power control module

EM1 P910.02 serves to turn on the MDM modules, generate secondary voltages minus 5 V, minus 6 V, control toric voltages and block overheating. To power the control circuits in EM1, there is a 5VSL service power supply, implemented on the 142EN5 (D12) chip, and 12VSL service power supply. The P910.02 module is turned on by the “DU” signal. To protect the signal from switching on and preventing false switching on and off, the duration of the switching signal is controlled by a circuit.

When setting up EM1 P910.02, it is possible to block the voltage control circuit.

Block overheating control circuit

To adjust the response temperature of the overheat control circuit, use resistor R59. When the overheating control circuit is triggered, the “PER” signal is issued. For the circuit to work, it is sufficient to have a voltage of 27 V. The circuit is checked by bridging the "PTD" and "GEN" jacks, which causes the circuit to trip and generate a "PER" signal. The circuit is tuned by setting the voltage between the sockets "KTD1" and "KTD2" equal to {[70-1.2 * (Tokr-25)] ± 10} mV, where Tokr is the ambient temperature in degrees Celsius at the time of setting.

Industrial applicability

This technical solution is industrially feasible, has the required functionality for pairing with an analog radar station, is made in the form of a portable unit of minimal dimensions and power consumption.

Claims (1)

A remote unit for interfacing with analog radar stations, containing five first-level modules: the first module EM1 P910.01 of a 36 V reference generator with a frequency of 400 Hz and a control signal amplifier of a synchronous servo drive (MSS) of a mobile radio altimeter (PRV), the second module EM1 P910 .02 power supply control and monitoring unit, the third module EM1 R910.03 of the converter of three-phase signals of the joint venture to the azimuth code, the fourth module EM1 P910.04 of analog-to-digital converters (ADC) of the azimuth code and the sine of the elevation angle of the antenna of the PRV, the fifth module E 1 Р910.05 of an echo signal transducer, a transceiver and a command register of a ground-based radio interrogator (NRZ), as well as a +5 V voltage source module MDM15-1V05M and three +15 V voltage sources, + 15 V, + 15 V and +30 V voltage supply module MDM15-1V15M, the inputs of which are connected with a voltage of +27 V, and the outputs with nodes of the second, third, fourth and fifth modules of the first level, characterized in that the third and fourth modules of the first level EM1 P910.03 and EM1 P910.04 contain a status register of the CWG, the input of which connected to the input CONDITION from the radar station (radar), analog-digits A new converter of coarse readout (GO) and accurate readout (TO) voltages into an ADC azimuth code, the first input of which is connected to the output U reference, and the second and third input, respectively, with the outputs of coarse (GO) and accurate (TO) readings from the radar, analog digital converter of the sine of the elevation angle of the ADC SUM, the input of which is connected to the output of U * sinε PRV, register RG, the first (D) input of which is connected to the outputs of the CWG register (signal CC), ADC (signal code β) and ADC SUM (signal code sinε ), and the second input (C) - with the output of clock pulses TI PRD 500 kHz, azimuth setting register RVP RGA, adder for distinguishing the difference between the current azimuth and the azimuth of the PRV SM installation, the first input of which is connected to the output of the ADC A, and the second input is connected to the RGA output, a digital-to-analog converter of the DAC azimuth mismatch, the input of which is connected to the output of the SM adder, and the GO and MOT - with PRV inputs, the azimuth code conversion circuit implemented on the third and fourth modules of the first level contains X / Y converters of three-phase voltage of selsyn sensors to voltage proportional to sinβ and cosβ for coarse (GO) and accurate signals (TO) counts connected respectively to the outputs 1, 2, 3 of the GO Phase and the TO phases of the radar, the azimuth code counter GO CT2 and the azimuth code counter GO x36, the inputs of which are connected respectively to the +1 and -1 radar outputs and the Azimuth code (GO ) Radar, and the first outputs, respectively, with the outputs The azimuth code (GO) and the TO code of the device, voltage switches sinβ, cosβ GO K1 and sinβ, cosβ TO K2, two inputs of which are connected respectively to two outputs sinβ and cosβ of the X / Y GO converters and MOT, and the third inputs - with the second outputs of the azimuth counters GO and MOT, two adders correction azimuth code C MK GO and SMK TO, two inputs of which are connected respectively to the first outputs of the azimuth code counters GO and TO and the Corr correction inputs. GO and Corr. Device maintenance, two differential amplifiers ДУ GO and ДУ ТО, the inputs of which are connected respectively to the outputs of sinβ / cosβ of the voltage switches sinβ, cosβ GO K1 and sinβ, cosβ TO K2, two digital-to-analog converters DAC GO and DAC TO, the inputs of which are connected respectively to the outputs azimuth correction code adders SMK GO and SMK TO, and the outputs, respectively, with the second inputs of the differential amplifiers DU GO and DU TO, a comparator, two inputs of which are connected to the output of the differential amplifier DU GO and DU GO and the signal circuit Threshold GO, signal switch to errors GO / TO K3, the three inputs of which are connected respectively to the outputs of the differential amplifier ДУ GO, the differential amplifier ДУ ТО and the comparator, the voltage / frequency converter U / F, the input of which is connected to the output of the switch of the error signals GO / TO K3, and the output is with signal circuits +1, -1 of the device, the fifth module of the first level ЭМ1 Р910.05 contains an analog-to-digital converter of the echo signal of the ADC ECHO, the input of which is connected to the output of the ECHO radar, the comparison circuit, the two inputs of which are connected respectively to the outputs of the OOZN and U cutoff Radar a radar distance counter (RLI), a SchC1 transmitter distance counter, two inputs of which are connected respectively to the TI radar clock outputs 750 kHz and an IZ start pulse output, a transmitter distance counter, a CcD2 radar distance counter, two inputs of which are connected respectively to the radar and TI PRD 500 kHz, dual-port random access memory (RAM) RAM, the four inputs of which are connected respectively to the ADC of the ECHO by the signal of the target mark (OC), the comparison circuit by the signal of the general recognition (OP), the counter SchD1 by signal at the RECORD ADDRESS and the СЧD2 counter according to the READ ADDRESS signal, the transmitter of the transmitter, the two inputs of which are connected respectively to the output of the dual-port random access memory and the output of the register RG, the output transformer T1.2, the inputs of which are connected to the outputs of the transmitter of the transmitter, and the output to the communication line LS, input transformer T1.1, the input of which is connected to the communication line of the LS, the PfP receiver, whose inputs are connected to the output of the transformer T1.1, and the output - with the input of the RGA register, the command register of the Republic of Kazakhstan, the input of which is connected to the output of the PFP receiver, bl ok relay, the input of which is connected to the output of the command register, and the output - circuit NRZ MODE.