RU2631831C1 - Device for detecting pulsed radiators - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: output group of the time interval determining unit is connected to the first input group of the second permanent memory, the second input group and the output group of which are connected to a base distance sensor between the receivers and the second input group of the calculator, in addition, the time interval determining unit comprises a counter, a delay line for setting the counter, a unit of sequentially connected delay integral lines, an OR element, a unit of the parallel coincidence elements, wherein the input of the OR element is the first input of the time interval determining unit, the first inputs of the coincidence elements and the input of the delay line for setting the counter are the second input of the time interval determining unit, the output of the OR element is connected to the first input of the counter, the second input of which is connected to the delay line for setting the counter and the input of the unit is connected with the second input of the OR element, and the output group is connected to the input group of the unit of the parallel coincidence elements, the output group of which, as well as the output group of the counter, is the output group of the time interval determining unit.

EFFECT: increasing the accuracy of determining the range of pulsed radiators.

3 dwg

Description

The invention relates to the field of location technology and can be used in a system for searching and detecting objects.

A device for detecting pulsed emitters, is presented in patent No. 2604353, bull. 34 from 01.02.2016 Chasovskoy A.A. Using wide-directional antennas spaced relative to each other, it receives pulsed electromagnetic signals, which are then converted into electrical signals in the receivers. The signal from the output of the first receiver passes through a delay line, the magnitude of which depends on the distance between the antennas. To increase accuracy, the base distances can be increased, for example, to 10,000 m. Next, the signal is fed to the first input of the time interval determination unit, and the signal from the second diversity receiver is received at the second input. The group of outputs of this unit is connected to the group of inputs of the calculator through a read-only memory device, where for each interval certain information from the emitter is sewn up and where information about the base distance between the antennas also arrives. Based on the aspect ratio of the triangle, the calculator determines the distance and direction to the emitters. In the block of secondary processing is the construction of the trajectory of the emitters, which is displayed on the indicator. However, bulky equipment is required to determine the range to the emitter.

A device for detecting pulsed emitters, described as a device for determining the direction to pulsed emitters, is presented in the patent of the author No. 2586622, bull. No. 16 dated 08/24/2015.

Using the proposed device increases the accuracy of determining the range.

This is achieved by introducing a second read-only memory, while the group of outputs of the time interval determination unit is connected to the first group of inputs of the second read-only memory, the second group of inputs and the group of outputs of which are respectively connected to the base distance sensor between the receivers and to the second group of inputs of the calculator, in addition the unit for determining the time intervals contains a counter, a delay line for installing the counter, a block of series-connected integrated lines with the latency, the OR element, the block of parallel coincidence elements, the input of the OR element being the first input of the time interval determination unit, the first inputs of the coincidence elements and the input of the delay line for setting the counter are the second input of the time interval determination unit, the output of the OR element is connected to the first input of the counter, the second input of which is connected to the delay line for installing the counter, and the input of the block of series-connected integrated delay lines, the output of which is connected to the second input of the AND element And, a group of outputs coupled to inputs of a group of parallel block elements overlap, a group whose outputs as well as a group of counter outputs are a group determination unit outputs the time slot. In FIG. 1 and the following notation is used in the text:

1, 2 - wide directional antennas

3, 4 - receiver

5 - delay line

6 - unit for determining the time interval with increased accuracy characteristics

7, 8 - read-only memory

9 - base distance sensor between receivers

10 - calculator

11 - secondary processing unit

12 is an indicator, while the outputs of wide-directional antennas 1, 2 are respectively connected through a receiver 3, 4 to the input of the delay line 5 and to the second input of the time interval determination unit with increased accuracy characteristics 6, having a first input and a group of outputs, respectively connected to the line output delays 5 and with the first groups of inputs of the read-only memory device 7 and 8, the latter having a second group of inputs and a group of outputs, respectively connected to the group of outputs of the base distance sensor between 9 and with the first group of inputs of the calculator 10 having a second group of inputs connected to the group of outputs of the permanent storage device 7 having a second group of inputs connected to the group of outputs of the base distance sensor between the receivers 9, and the group of outputs of the computer 10 is connected through the secondary processing unit 11 with a group of inputs indicator 11.

The device operates as follows. Using two antennas, widely oriented, for example, 180 degrees in azimuth, spaced a basic distance, for example, 10,000 meters, pulsed electromagnetic signals are received, which are then converted into electrical signals in receivers 3, 4. At the receivers, the signals are allocated according to the expected characteristics. From the output of the receiver 3, the signal passes through the delay line 5, the value of which depends on the distance between the antennas 1, 2. From the output of the delay line 5, the signal goes to the first group of inputs of the time interval determination unit with increased accuracy characteristics 6. An example of the execution of block 6 is presented in the book Vasin V.V., Stepanov B.M., reference book on the radiolocation 1977, p. 219, as well as in the author’s patent No. 2602067, bull. 16, 2016, where stable integral elements with a minimum delay of one element of 1 ns can be used as a delay line. A constant response time is also provided. Moreover, each interval corresponds to a certain direction and range. In FIG. 2 shows the circuit of block 6. The first signal from the delay line 5 is supplied through the first input of block 6, through an element or 15 to the block of series-connected integrated delay lines 16, which have series-connected delays. The signal through element or 15 also enters the input of the counter 17. The total signal delay in block 16 is equal to the time the counter 17 is transferred from one position to another, i.e. the counter will work by the time the signal exits from block 16, which also arrives at the second input of element or 15. The output of each integral delay element is connected to the corresponding coincidence element of the block of parallel coincidence elements 13. Signals from receiver 4 and also through the delay line are sent to other coincidence elements 14 to reset the counter. Thus, the information from the block of coincidence elements 13 and the counter 17 of block 6 characterizes the time interval entering the read-only memory 7, 8, and the second group of inputs of the read-only memory 8 receives information about the base distance from the base distance sensor between the receivers 9. For clarification, we use FIG. 3, where the emitter is located at point O, and the antennas are at points A and B. At point C is the intersection of the bisector of the OS of the angle AOW with the segment AB. Each interval, depending on the difference of the OB-OA lines, corresponds to a certain OCA angle characterizing the direction. The time interval characterizing this direction enters a read-only memory 7, where depending on the base AB and the angle of the OSA, a certain value of the AC segment is sewn up and fed to the second group of inputs of the calculator 10. The calculator 10 determines the range and direction to the emitter at point A. The value of the range and direction from the group of outputs of the transmitter goes to the secondary processing unit 11, where the path of the media is determined and living, and the group of outputs of this block 11 is connected to the group of inputs of the indicator 12, which displays the emitters. An example of a specific implementation of the secondary processing unit and the computer is presented in the book "Radio Engineering Systems", V. Pestryakov. et al., 1895, p. 219. In the proposed device, a pulsed emitter can not only emit, but also reflect electromagnetic energy. Thus, due to nanosecond resolution, the time interval provides an increase in the accuracy characteristics in range and direction when using two wide-directional antennas.

Here is an example of a specific implementation: let two antennas with fields of view of 180 degrees in azimuth and 10 degrees in elevation, spaced 10000 m apart from each other, receive pulsed signals from a radiator located at a distance of 400 km. Then the accuracy of determining the range can be 20 meters, and the direction of 10 minutes. The proposed device can be used in navigation systems, air traffic control and location.

Claims (1)

A device for detecting pulsed emitters, consisting of two wide-directional antennas, two receivers, a delay line, a unit for determining the time interval, a permanent storage device, a sensor for the basic distance between the receivers, a computer for determining the distance to the emitter and the direction to the emitter, the secondary processing unit and indicator where the outputs of the first and second broadband antennas are respectively connected through the first and second receivers to the input of the delay line and to the second input a time interval determination unit having a first input and a group of outputs respectively connected to an output of a delay line and to a first group of inputs of a first read-only memory having a second group of inputs and a group of outputs respectively connected to a group of outputs of a base distance sensor between receivers and a first group of inputs a calculator having a group of outputs connected through a secondary processing unit to a group of indicator inputs, characterized in that a second read-only memory is introduced device, wherein the group of outputs of the time interval determination unit is connected to the first group of inputs of the second read-only memory device, the second group of inputs and the group of outputs of which are connected to the base distance sensor between the receivers and the second group of inputs of the calculator, in addition, the time interval determination unit contains a counter , a delay line for installing the counter, a block of series-connected integrated delay lines, an OR element, a block of parallel coincidence elements, and the input is electronic OR is the first input of the time interval determination unit, the first inputs of the coincidence elements and the input of the delay line for setting the counter are the second input of the time intervals determining unit, the output of the OR element is connected to the first counter input, the second input of which is connected to the delay line for setting the counter and the input block of series-connected integrated delay lines, the output of which is connected to the second input of the OR element, and the group of outputs is connected to the group of inputs of the block of parallel elements ovpadeniya group whose outputs as well as a group of counter outputs are time slot group determination unit outputs.

Images