RU2232401C1 - Signal processing device - Google Patents

Abstract

FIELD: passive detection and ranging.

SUBSTANCE: the device has a corrected constant read-out unit, azimuth and azimuth marks transmitter, direction-control switch, coincidence element unit, secondary processing unit and a second subtracter, a separate output and a group of outputs of the azimuth and azimuth marks transmitter are respectively connected to the separate inputs of the secondary processing unit, corrected constant read-out unit, and to the group of inputs of the coincidence element unit, having a separate input connected to the output of the direction-control switch, whose first and second of the first signal transmitter and to the output of the second signal transmitter, and the group of outputs of the coincidence element unit is connected to the first group of inputs of the secondary processing unit, whose second group of inputs is connected to the group of outputs of the measuring device also connected to the second group of inputs of the second subtracter, having the first group of inputs and a group of outputs respectively connected to the group of outputs of the secondary processing unit and to the second group of inputs of the subtracter, whose first group of inputs is connected to the group of outputs of the corrected constant read-out unit.

EFFECT: enhanced accuracy of determination of the range to a moving radiator.

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Description

The invention relates to the field of passive location and can be used in range determination systems. A device for processing signals from a rotating sensor, which is part of a television device for determining the range described in patent No. 2081431, author Chasovskaya A.A.

Using this device, the range is determined using the rectangular working area of the rotating lens of the television sensor as the base. However, the device is not able to determine the distance to the moving emitter.

A known signal processing device set forth in patent No. 2081438 under the name "Rangefinder", by A. Chasovskaya It rotates a three-section infrared sensor. The section is bounded by two vertical parallel segments. The width of the central section is used as a base. In the case of infrared radiation from the object during the rotation of the lens, two signals from the outputs of two inverters, which are the sensor of the first and the sensor of the second signal, are sequentially fed to the measuring device. The temporal mismatch between these signals is determined in the measuring device during the time between the beginning and the end of radiation fixation at the moments of their equal entry into the central and side sections, which corresponds to the moments of intersection of the lines limiting this central section, the middle of the radiation area. The magnitude of the temporary mismatch with a constant base depends only on the range and consists of constant and variable components. Information about the constant component is fed to the subtractor, where it is subtracted from the aforementioned temporary mismatch, and the difference characterizing the range is transmitted to the indicator.

However, the device reduces the accuracy of determining the range in the presence of a moving emitter. Using the proposed device increases the accuracy of determining the distance to a moving emitter.

This is achieved by introducing the block for issuing the corrected constant, the azimuth sensor and azimuth marks, the direction switch, the block of coincidence elements, the secondary processing unit and the second subtracter, while the separate output and the group of outputs of the azimuth sensor and azimuth marks are respectively connected to the individual inputs of the secondary processing block the issuance of the corrected constant, and with the group of inputs of the block of coincidence elements having a separate input connected to the output of the direction switch, the first and second inputs of the cat They are respectively connected to the output of the sensor of the first signal and to the output of the sensor of the second signal, and the group of outputs of the block of matching elements is connected to the first group of inputs of the secondary processing unit, the second group of inputs of which are respectively connected to the group of outputs of the measuring device, which is also connected to the second group of inputs of the second a subtractor having a first group of inputs and a group of outputs, respectively connected to the group of outputs of the secondary processing unit and to the second group of inputs of the subtractor, the first group ppa of inputs of which is connected to the group of outputs of the block issuing the corrected constant.

In FIG. 1 and the following notation is used in the text:

1 - measuring device;

2 - indicator;

3 - subtractor;

4 - block issuing the corrected constant;

5 - sensor of the first signal;

6 - direction switch;

7 - second signal sensor;

8 - sensor azimuth and azimuth marks;

9 - block matching elements;

10 - block secondary processing;

11 - the second subtractor,

wherein a separate output and a group of outputs of the azimuth sensor 8 and azimuth marks are respectively connected to the individual inputs of the secondary processing unit 10, the output unit of the adjustable constant 4 and the group of inputs of the block of coincidence elements 9 having a separate input connected to the output of the direction switch 6, the first and the second inputs of which are respectively connected to the output of the sensor of the first signal bis the output of the sensor of the second signal 7, connected in the same way to the first and second inputs of the measuring device 1, the group of outputs of which connected to the second groups of inputs of the second subtractor 11 and the secondary processing unit 10, the first group of inputs and the group of outputs of which are respectively connected to the group of outputs of the block of matching elements 9 and to the first group of inputs of the second subtractor 11 having a group of outputs connected to the second group of inputs of the subtractor 3, having a first group of inputs and a group of outputs, respectively connected to the group of outputs of the output unit of the corrected constant 4 and to the group of inputs of the indicator 2.

The operation of the device is as follows. In the process of rotation of the working zone of the radiation receiver, pulses are generated using the sensor of the first and the sensor of the second signals 5 and 7. They can be, for example, inverters that fix, respectively, zero differences between the signals of the first and second sections and between the signals of the second and third sections in the process rotation of a three-section infrared receiver, presented in the main analogue. The pulses from the sensor of the first signal and from the sensor of the second signal respectively arrive at the first and second inputs of the measuring device 1, which determines the time mismatch between two pulses similar to the range converter, presented, for example, in the book Vasin V.V., Stepanov B.M. Reference book on radiolocation "- M .: 1977, g., P. 214, Fig. 9.7.

In FIG. 2 shows the working area of the central section of the receiver. We will restore from points a and two parallel lines 16 and 17. The time that these lines intersect the middle of the emitting area is inversely proportional to the distance to the emitter. Therefore, the total crossing time during rotation of the working area also depends on the range. However, the intersection time of the rotating zones bounded by lines 15 and 16, as well as 17 and 18 is independent of range. As a base, for example, a part of the infrared sensor lens limited by vertical parallel segments can be used. Thus, the sensors of the first and second signals give these signals to the measuring device 1 (see Fig. 1) at the moments of intersection by lines 15 and 18 (see Fig. 2), which limit the working area of the central section, the middle of the radiating area, at which the difference amplitudes of signals have zero value.

The direction switch 6 is a two-position switch that can be connected to any of the sensors 5 go 7. The azimuth sensor and azimuth marks 8 gives out the azimuth and the following azimuth marks in the secondary processing unit 10 through the block of coincidence elements 9 at the time of the presence of the signal permissions from one of the sensors 5 or 7. An example of a specific design of an azimuth sensor and azimuth marks is presented, for example, in the aforementioned source "Radio Engineering Systems" on page 414.

The secondary processing unit 10 is a computer and performs auto-tracking in the azimuth of the emitters during the rotation of the three-section infrared receiver and determines on the basis of this the change in time mismatch, during which the value comes from the output of the measuring device 1, and which, depending on the direction of movement of the object, can have a positive or negative value. This change in the form of a code is sent to subtractor 11. An example of a specific implementation of the secondary processing unit, including auto-tracking in azimuth, is presented in the aforementioned source on page 197, Fig. 7.5a.

In the process of auto tracking, the secondary processing unit 10 determines the temporal mismatches t ₁ between two signals related to the same object, and the difference between these temporary mismatches Δt ₁ determined during the auto tracking of moving objects. Moreover, depending on the direction of movement of the objects, the value Δt ₁ may have a positive or negative value. Therefore, based on the information about the temporary mismatch t ₂ c of the measuring device 1 in the secondary processing unit 10, the change in the temporary mismatch Δt ₂ over the time t ₂ is also determined. Since the value of Δt ₁ can have any sign, the value of Δt ₂ can also have both positive and negative values, which are sent to the subtractor 11 in the form of a code, where they are subtracted from the time mismatch code t ₂ from the measuring device 1, coming to another group of inputs of the subtractor 11, that is, the difference t ₃ = t ₂ -Δt ₂ (1) is determined. Thus, the information t ₃ at the output of the subtractor 11 is the information that would have occurred at the output of the measuring device 1, if the emitter was not shifted in azimuth. Moreover, if the value Δt ₂ will have a negative value, then the subtractor 11 will perform the functions of the adder. Information from the output of the subtractor 11 consists of a variable and a constant component. The variable component depends only on the distance, and the constant is constant and depends on the magnitude of the angular divergence between the rays 15 and 18 (see Fig. 2). However, the information from the output of the subtractor 11 changes with instability of the rotation speed of the receiver. In this regard, unlike the main analogue, the constant in the block for issuing the corrected constant 4 is also adjusted, which, depending on the changing time differences between successive azimuthal marks from the azimuth sensor and azimuthal marks 8, corrects the constant component, which is a constant. In this case, the temporary discrepancies change with a change in the rotation speed of the receiver. An example of a specific implementation of the block of the corrected constant is presented in the patent of the author No. 21644004, application No. 98116202/28, bull. No. 16 dated June 10, 2000 under the name “Device for measuring the linear dimensions of objects”, where the function of block 4 is performed by the “size corrector”. The only difference is that in the block of the corrected constant, information on the signal duration uses information about the constant component, which is determined in advance when adjusting. The code characterizing the adjusted value of the constant component t _post from the output of the block of the corrected constant 4 is fed into the subtractor 3, where it is subtracted from the code value coming from the subtractor 11, which carries the updated information about the sum of the variable and the constant component without taking into account the changes associated with the offset object. Thus, at the output of the subtractor 3, there is a code characterizing the corrected variable component t _per without taking into account the increment of the mismatch arising due to the displacement of the emitter in azimuth and taking into account the instability of the rotation speed of the receiver, i.e., t _per = t ₃ -t _post (2 ) This corrected code carries the specified value of the distance to the emitter, which is displayed on indicator 2.

The proposed device can be used to determine the range in the presence of two synchronously rotating infrared receivers spaced a certain distance, as indicated in the first analogue and patent of the author No. 2081431. However, the use of one three-section infrared receiver, for example, such as in the main analogue, reduces the bulkiness devices. The most effective device can be used in security systems and collision avoidance. The accuracy of determining the range, including to the object moving in the direction of the direction, is not affected by the instability of the rotation speed of the receivers.

Claims (1)

A signal processing device consisting of a measuring device, a first signal sensor, a second signal sensor, a subtractor and an indicator, where the outputs of the first and second signal sensors are respectively connected to the first and second inputs of the measuring device, and the group of the subtractor outputs is connected to the group of indicator inputs, characterized in that introduces the block issuing the corrected constant, the azimuth sensor and azimuth marks, direction switch, block of coincidence elements, the block of secondary processing and the second subtractor b, while the separate output and the group of outputs of the azimuth sensor and azimuth marks are respectively connected to the individual inputs of the secondary processing unit, the output unit of the adjustable constant, and to the group of inputs of the block of coincidence elements having a separate input connected to the output of the direction switch, the first and second inputs which is respectively connected to the output of the sensor of the first signal and to the output of the sensor of the second signal, and the group of outputs of the block of matching elements is connected to the first group of inputs of the block of secondary processing doors, the second group of inputs of which are connected to the group of outputs of the measuring device, also connected to the second group of inputs of the second subtractor, having the first group of inputs and the group of outputs respectively connected to the group of outputs of the secondary processing unit and to the second group of inputs of the subtractor, the first group of inputs of which are connected to group of outputs of the block issuing the corrected constant.

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