RU2288483C1 - Device for processing location signals - Google Patents

Abstract

FIELD: radio engineering.

SUBSTANCE: device has receiver, distance converter, synchronizer, azimuth and location angle transducer unit, indicator unit, TV distance transducer, TV coordinator unit, secondary processing unit and unit composed of two adders.

EFFECT: high accuracy in determining angular coordinates in optical visibility zone.

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Description

The invention relates to the field of location technology and can be used in radio systems.

A device for processing location signals is described in the book by Yu.M. Kazarinov. - M .: Radio engineering systems, Higher school, 1990, p. 383. It is part of the radar and is able to determine the range to objects in the field of view of the antenna pattern, regardless of its width. However, the accuracy of determining the angular coordinates depends on the rotation of the antenna.

A device for processing location signals, described in the aforementioned source on page 195, which is part of a single-channel radar. In it, with the help of a receiver, the electromagnetic energy reflected from objects is converted into electrical energy and signals are extracted according to the corresponding characteristics. Next, the selected signals are fed to the range converter, where the distances to all objects that are in the field of view of the radiation pattern are determined, regardless of its width in the form of temporary mismatches between pulses from the synchronizer and the moments of arrival of the reflected signals. The ranges are displayed on the indicator along with the angular coordinates from the azimuth and elevation sensors. However, the accuracy of determining the angular coordinates, including up to objects in the zone of optical visibility, also depends on the rotation of the antenna.

Using the proposed device increases the accuracy of determining the angular coordinates in the area of optical visibility without introducing additional radar nodes. This is achieved by introducing: a television range sensor, a secondary processing unit, a television coordinator and a unit of two adders, while the first, second, third and fourth groups of inputs and the first, second groups of outputs of the secondary processing unit are respectively connected: to the group of outputs of the range converter, with a group of outputs of a television sensor, with the first and second groups of outputs of the television coordinator, with the first and second groups of inputs of a block of two adders having a third and fourth group of inputs, and the first and second groups of outputs respectively connected to the first and second groups of outputs of the block from the azimuth and elevation sensor, and with the second and third groups of indicator inputs.

In the drawing and in the text, the following notation:

1 - receiver;

2 - range converter;

3 - synchronizer;

4 - television range sensor;

5 - block secondary processing;

6 - block of two adders;

7 - indicator;

8 - television coordinator;

9 is a block of azimuth and elevation sensors,

the first, second, third and fourth groups of inputs, the first and second groups of outputs of the secondary processing unit 5 are respectively connected: to the group of outputs of the range converter 2, to the group of outputs of the television range sensor 4, to the first and second groups of outputs of the television coordinator 8, s the first and second groups of inputs of a block of two adders 6 having a third and fourth groups of inputs, the first and second groups of outputs respectively connected to the first and second groups of outputs of the block from the azimuth and elevation sensors and 9, with the second and third groups of inputs of indicator 7, the first group of inputs of which is connected to the aforementioned group of outputs of the range converter 2, having first and second inputs, respectively connected to the output of receiver 1 with the output of synchronizer 3.

The operation of the device is as follows.

Using the receiver 1, the electromagnetic energy reflected from the objects is converted into electric energy and the signals characteristic of the expected objects are extracted. The selected signals are fed to the range converter 2, where the distances to all objects that are in the field of view of the antenna pattern of the receiver are determined in the form of temporary mismatches between the pulses from the synchronizer 3 and the signals from the receiver 1. The range value is sent to the secondary processing unit 5.

An example of the performance of the range converter is presented, for example, in the book Vasin V.V. and Stepanov B.N. "Reference book on radiolocation", 1977, p. 214. The secondary processing unit 5 also receives information about the range to objects from a television range sensor 4, which has two lenses spaced at the base distance, the field of view of which is equally directed with the radiation pattern of the antenna of the receiver 1. Also in the secondary processing unit simultaneously with the distance from the television the range sensor receives the azimuthal and elevation coordinates from the television coordinator 8. This is done by simultaneously determining the range and angular coordinates at Scanning two television scans.

An example of a specific implementation of a television range sensor, which can work in the infrared spectrum, is presented, for example, in the author’s patent No. 2105994 entitled “Rangefinder”, which determines the distances to all objects in the field of view of its lenses, which can also be increased. An example of a specific implementation of a television coordinator is presented, for example, in the book of Barsukov et al. “Television systems of aircraft, 1979, p. 237, where the line and frame coordinates of the selected objects correspond to the azimuth and elevation coordinates in the field of view of one television sensor. Moreover, the accuracy of determining the angular coordinates is higher than in the radar. In the secondary processing unit 5, the ranges are compared from the range converter 2 and from the television range sensor 4 and the identification of information belonging to the same objects, but differing from each other by values not exceeding a strictly defined value. Such actions are similar to actions when tracking along the range of moving objects is carried out. Thus, each azimuthal and elevation coordinate of the object from the television coordinator 8 corresponds to certain information about the range from the range converter 2. Therefore, after receiving information about the distance to the object from the range converter 2, the secondary processing unit 5 provides information about its azimuthal and elevation coordinate in a block of two adders 6. Moreover, the azimuthal coordinate enters the first adder of block 6, and the angular coordinate in the second. The first and second adders also receive information about the azimuth and elevation from a block of azimuth and elevation sensors 9, corresponding to the position of the central axis of the antenna. However, the information from the secondary processing unit 5 may have a positive or negative value depending on the location of the selected object relative to the coordinate of the central axis of the antenna.

As a result of summing the aforementioned azimuthal and elevation coordinates from two groups of outputs of a block of two adders 6, the indicator 7 receives data on azimuths and elevation angles of all objects that are in the field of view of the television range sensor 4. Simultaneously with the angular data of the object, they also enter indicator 7 and its range data from range converter 2.

An example of the execution of the secondary processing unit 5 is presented, for example, in the aforementioned main analogue. In the same source on page 414 an example of the execution of a block of azimuth and elevation sensors 9 is presented.

Using the proposed device provides accuracy characteristics in angular coordinates in the absence of rotation of the antenna pattern.

The device can be used in multi-purpose tracking and search systems for the protection of objects, collision avoidance and air traffic control.

Claims (1)

A device for processing location signals, consisting of a receiver, a range converter, a synchronizer, a block of azimuth and elevation sensors and an indicator, where the output of the receiver is connected to the first input of the range converter, having a second input and a group of outputs, respectively connected to the output of the synchronizer and the first group indicator inputs, characterized in that a television range sensor, a television coordinator, a secondary processing unit and a unit of two adders are introduced, with the first, second, third and h the fourth group of inputs and the first, second groups of outputs of the secondary processing unit are respectively connected to the group of outputs of the range converter, to the group of outputs of the television sensor, to the first and second groups of outputs of the television coordinator, to the first and second groups of inputs of the block of two adders having a third and fourth groups of inputs, and the first and second groups of outputs, respectively connected to the first and second groups of outputs of the unit from the azimuth and elevation sensors, and with the second and third groups of inputs a.