System for transforming angular displacement of gantry

FIELD: electronic engineering.

SUBSTANCE: device has a setoff transducers kinematically connected to gantry shaft, angular information transformer, code transducer, adder, control unit, clock pulse oscillator, delay circuit, binary pulse counter, two static registers, digital comparator line and RAM unit.

EFFECT: high transformation accuracy.

3 dwg

 

The invention relates to the field of radar technology, and can be used in radar stations (RLS).

A known system for converting angular movement of the radar antenna on A.S. 129123 containing sensor unit with an input for connection of the shaft of the antenna and connected in series with him Converter angular information and the set of gates. Sensor unit converts the angular displacement of the shaft of the antenna in azimuth information in the form of two sequences of pulses: one pulse and 2npulses per revolution of the shaft of the antenna, where n is the number of bits of the code corner. Of these pulse sequences Converter angle information representing a binary pulse counter, which generates the binary code of the angle input to the block forming gates. The disadvantage of the system is that it does not allow you quickly and easily carry out the operation of the orientation of the radar, as well as the presence of it in the generated code corner unaccounted functional component of the angular error, which is within each shaft revolution of the antenna is changed in accordance with the law of variation of the errors of the kinematic chain connecting the sensor unit to the shaft of the antenna. Error of the kinematic chain can be substantial and can reach 30-40% of the total conversion error angle, which actually leads to a reduction of the structure conversion accuracy of the angular displacement of the radar antenna.

Closest to the technical nature of the proposed system is the transformation of the angular information as 184203, which is adopted as a prototype. The system comprises a sensor unit, kinematically connected with the shaft of the antenna, the inverter angular information, the adder, the sensor code and a control unit. The output of the sensor unit is connected to the input of the inverter angular information, the sensor output code connected to the first input of the adder, a second input connected to the inverter output angular information, and the output from the control unit. This system allows to simplify the operation of the orientation of the radar and, therefore, reduce the time of orientation. The disadvantage of this system as well as system-analogue, is the presence of it in the generated code corner unaccounted functional component of the angular error.

The technical result of the invention is to improve the accuracy of conversion of the angular displacement of the radar antenna by eliminating functional component conversion errors caused by errors of the kinematic chain.

To achieve the technical result in the system prototype, which contains the sensor unit, kinematically connected with the shaft of the antenna, the inverter angular information, the adder, the sensor code and a control unit, where the output of the sensor unit is connected to the on input of the inverter angular information the sensor code is connected to the first input of the adder, the output of which is connected to the control unit, inputs the clock pulses, the delay circuit, a binary pulse counter, the first and second static registers, a line of digital Comparators and operational storage device, and first and second outputs of the inverter angular information connected with the first and second inputs of the operational storage device, and a third output from the first inputs of the first and second static registers and to the input of the delay circuit, the output of which is connected to the first input of a binary pulse counter, a second input connected to the output of the generator of clock pulses and a second input the second static register, and the output to the second input of the first static register and the first input line of digital comparator, the second input of which is connected to the output of the first static register and output to the third input of the second static case, the output of which is connected to the third input of the memory device, the output of which is connected with the second input of the adder.

The invention is illustrated in the following description and drawings, on which:

figure 1 - structural diagram of the prototype;

figure 2 - structural diagram of the proposed system;

figure 3 - temporary the chart of signals of the system.

In figure 1, 2 the following notation:

1 is a block sensors;

2 - transducer angular information;

3 - sensor code;

4 - adder;

5 - control unit;

6 is a generator of clock pulses;

7 - delay circuit;

8 is a binary pulse counter;

9, 10, the first and second static registers;

11 is a line of digital Comparators;

12 - random access memory.

Figure 3 the following notation:

Code value 1 analog representation of the code on the inverter output angular information;

The code value 2 analog representation of the code at the output of the operational storage device;

TVAthe period of rotation of the antenna.

The proposed system converting the angular displacement of the radar antenna (figure 2) contains the sensor unit 1, kinematically connected with the shaft of the antenna, the inverter angular information 2, the sensor code 3, the adder 4, the control unit 5, the clock 6, the delay circuit 7, a binary pulse counter 8, the static registers 9 and 10, a line of digital Comparators 11 and a random access memory 12, the output of the sensor unit 1 is connected to the input of the inverter angular information 2, the sensor code 3 is connected to the first input of the adder 4, the output of which is connected to the input of the control unit 5, the first and second outputs preobrazovatelyakh information 2 are connected respectively with the first and second inputs of the random access memory 12, and the third output from the first inputs of the static registers 9 and 10 and to the input of the delay circuit 7, the output of which is connected to the first input of a binary pulse counter 8, a second input connected to the output of the clock 6 and the second input of the second static register 10, and the output from the second input of the static register 9 and the first input line of digital Comparators 11, the second input of which is connected to the output of the static register 9, and the output from the third input of the static register 10, the output of which is connected to the third input of the random access memory 12, the output of which is connected to the second input of the adder 4.

The system works as follows.

Sensor unit 1, kinematically connected with the shaft of the antenna, generates information about the rotation angle of the antenna, which is fed to the input of the inverter angular information 2 and converted into a digital n-bit code angle at exit 1 and two sequences of pulses: angular momentum (IM ) out 2 - in 2npulses for each turn of the antenna, where n is the specified number of digits code of the angle, and the reference pulses (t) at the output 3 - one pulse per rotation of the antenna.

The pulses from the clock pulse (T) 6 is coming to a binary pulse counter 8 and the register 10. The frequency of the TI must be several times what astate pulses IM. The pulse counter 8 is reset to the zero state once per rotation of the antenna reference pulse RI, arriving at its input 1 through the delay circuit 7. At a constant speed of rotation of the antenna at the end of each of its turnover in the counter will be reset digital code corresponding to the number received on input 2 counter clock pulses (TI). When switching the rotation speed of the antenna is changed accordingly and the value of the digital code within each cycle of the account.

Static register 9 stores within one turn of the antenna digital code received at its input 2 binary counter 8. Write code in the register 9 is performed by the signal RI, which is served on the register at the input 1. Code register 9 is given to the input 2 line digital Comparators 11. The number of Comparators in the line is equal to the number of bits of the output code of the angle. The Comparators are designed for bitwise comparison of the values of the current code at the input of 1 from the counter clock pulses 8, with the digital threshold of each comparator line.

Digital thresholds for the Comparators are defined as follows.

At the end of each turnover of the antenna in the register 9 is recorded and stored in digital code, equal in value to the number of clock pulses in one period of rotation of the antenna. By dividing this code on 2 generates the I digital threshold comparator older (n-1) discharge the converted code. By dividing the source code into 4, 8, 16, etc. are digital rapids all other Comparators up to comparator LSB. The division of the source code is made by reducing the weight of the bits in the bitwise mounting the shift outputs code in the direction of least significant bits.

When comparing the current code from the binary pulse counter 8 with the digital threshold of any of the comparator this comparator is triggered by issuing a reset pulse to zero all the younger Comparators line and the momentum of the installation unit to the input 3 of the corresponding digit of the register 10. Write code in the register 10 is performed by the signal T applied to the input 2 of the register 10. Reset the register to zero is the signal RI input to the input 1 of this register.

So, in the register 10 is formed of a digital code of the angle specified by its bit depth. This code is supplied to the information input 3 of the operational storage device 12, the address input 1 which receives the code of the angle transducer angular information 2. Record information in the random access memory 12 is input 2 signals in-depth interview with the inverter angular information 2.

Figure 3 shows a view codes arriving at the operational storage device 12, an analog expression. Each value code 1 - code address input 1 corresponds to the value is the code 2 - linearly changing code angle at the inlet 3. From the output RAM 12 linearly changing code 2 is supplied to the second input of the adder 4, which is folded code orientation, arriving at its input 1 sensor code 3. From the output of the adder 4 is oriented code corner code representing the azimuth of the radar antenna, is issued to the control unit 5.

Thus, the introduction into the system that contains the sensor unit, kinematically connected with the shaft of the antenna, the inverter angular information, the adder, the sensor code and a control unit, where the output of the sensor unit is connected to the input of the inverter angular information, the sensor code connected to the first input of the adder, the output of which is connected to the control unit, generator of clock pulses, the delay circuit, a binary pulse counter, two static registers, a line of digital Comparators, random access memory, where the first and second outputs of the inverter angular information are connected respectively with the first and second inputs of the operational storage device, the third output - with the first inputs of the first and second static registers and to the input of the delay circuit, the output of which is connected to the first input of a binary pulse counter, a second input connected to the output of the generator of clock pulses and a second input the m second static register, and the output to the second input of the first static register and the first input line of digital comparator, the second input of which is connected to the output of the first static register and output to the third input of the second static case, the output of which is connected to the third input of the memory device, the output of which is connected with the second input of the adder, reduces the overall conversion error of the rotation angle of the radar antenna by excluding unaccounted functional component of the angular error, which is caused by errors of the kinematic chain connecting the sensor unit to the shaft of the antenna.

Scheme of the proposed system converting the angular displacement of the radar antenna can be implemented on the following devices.

As the sensor unit (1) can be applied to a block of analog sensors using selsyns or rotating transformers. In this capacity may also be used, for example, the inverter angular photoelectric type POOF-P DIVG. Depending on the type of sensor transducer angular information (2) can be constructed either in the form of analog-to-digital Converter of the type ADC WATTS, either in the form of a binary pulse counter, for example, on the chip 564 II. The summator (4) can be built on a chip 564 IM1. Sensor code (3) m which may be a simple ROM from a set of switches signals "log.0" and ″ log.1″. As the control unit (5) can be used emitting indicators in number equal to the number of bits of the monitored code. Clock (6) can be built on the chip 564 GG, binary pulse counter (8) - on the chip 564 A, a delay circuit (7) - on the chip 564 RH2. Static case (9) can be implemented on the chip 564 IR, static case (10) - on the chip 564 TV2. Lineup of digital Comparators (11) can be built on a chip 564 IP2. As a random access memory device (12) can be used RAM on the chip type 541 RU1.

The conversion system of angular displacement of the radar antenna containing unit sensors, kinematically connected with the shaft of the antenna, the inverter angular information, the adder, the sensor code and the control unit, and the output of the sensor unit is connected to the input of the inverter angular information, the sensor code connected to the first input of the adder, the output of which is connected to the control unit, characterized in that it introduced a generator of clock pulses, a delay circuit, a binary pulse counter, the first and second static registers, a line of digital Comparators and operational storage device, and first and second outputs of the inverter angular information are connected respectively with the first and the second input is AMI random access memory device, the third output from the first inputs of the first and second static registers and to the input of the delay circuit, the output of which is connected to the first input of a binary pulse counter, a second input connected to the output of the generator of clock pulses and a second input of the second static register, and the output to the second input of the first static register and the first input line of digital comparator, the second input of which is connected to the output of the first static register and output to the third input of the second static case, the output of which is connected to the third input of the memory device, the output of which is connected with the second input of the adder.



 

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