RU2097787C1 - Radar signal processor - Google Patents

Abstract

FIELD: radar engineering. SUBSTANCE: radar signal processor enhances the accuracy of range finding to objects displacing in direction due to introduction of a range corrector consisting of an internal storage divider, direction subtracter, permanent storage and a multiplier; the first output of the receiver via the first input of the range corrector is connected to the first input of the internal storage having a second input connected via the divider, second input of the range corrector to the output of the direction transducer, having a third input connected together with the first input of the direction subtracter via the mentioned second input of the range corrector to the mentioned output of the direction transducer, and the second input of the direction subtracter and the output respectively are connected to the output of the internal storage, and via the permanent storage - to the first input of the multiplier, whose second input and output respectively are connected via the third input of the range corrector to the output of the measuring device, and via the output of the range corrector - to the second input of the indicator. EFFECT: enhanced accuracy of range finding. 1 dwg

Description

 The invention relates to the field of measurement technology and can be used in search and search systems using continuous radiation.

 A device for processing location signals is described in patent N 2031284 under the name "Radar" by A. Chasovskaya. Yanina T.A. In it, in the process of processing, the difference between the temporary position of two signals representing information and ranges is determined. However, the accuracy of processing location signals and the accuracy of determining the range decreases with the displacement of the object in the direction (for example, in azimuth).

 A device for processing location signals is described in patent N 2028645 by A. Chasovskoy. called "Optical Locator." It includes a receiving device, a measuring device, an azimuth sensor and an indicator. In it, the coarse range is determined in the measuring device by the temporary mismatch between the two signals coming from the receiving device. This mismatch enters the indicator to display the range. The indicator also receives directional information from the direction sensor. However, the accuracy of determining the range decreases if the object is shifted in direction (for example, in azimuth).

 Using the proposed device increases the accuracy of determining the range to offset in the direction of the objects. This is achieved by introducing a range corrector, consisting of a divider, random access memory, direction subtractor, read only memory and multiplier, while the first output of the receiving device through the first input of the range corrector is connected to the first input of random access memory having a second input connected through a divider, the second input of the range corrector with the output of the direction sensor having a third input connected, together with the first input of the subtractor, through the aforementioned the second input of the range corrector with the aforementioned output of the direction sensor, and the second input of the direction subtractor and the output, respectively, are connected to the output of the random access memory and through the permanent storage device with the first input of the multiplier, the second input and output of which are respectively connected through the third input of the range corrector to the output of the measuring device , and through the output of the range corrector with the second input of the indicator.

 The following notation is adopted in the drawing: 1 receiving device; 2 - measuring device; 3 direction sensor; 4 indicator; 5 range corrector; 6 divider; 7 random access memory; 8 - direction subtractor; 9 read-only memory; 10 - multiplier.

 The first output of the receiving device 1 through the first input of the range corrector 5 is connected to the first input of random access memory 7 having a second input connected through a divider 6, the second input of the range corrector 5 with the output of the direction sensor 3, and having a third input connected together with the first input the direction subtractor 8, through the aforementioned second input of the range corrector 5 with the aforementioned output of the direction sensor 4, and the second input of the direction subtractor 7 and its output are respectively connected to the output of the memory device 7, and through a permanent memory device 9 with the first input of the multiplier 10, the second input and output of which are respectively connected through the third input of the range corrector 5 with the output of the measuring device 2 and through the output of the range corrector 5 with the second input of the indicator 4, the first input of which connected to the aforementioned output of the direction sensor 3, in addition, the second input of the measuring device 2 is connected to the second output of the receiving device 1.

The operation of the device is as follows:
The receiving device 1 converts the radiation into electrical signals. It can, for example, be two receivers spaced at the base distance, with synchronously scanning or rotating fields of view. The receiving device 1 provides the signals of the beginning and end of the measurement to the measuring device 2. The measuring device determines the temporal mismatch between the two signals, which are a rough range. The direction sensor provides current information about the directions (azimuth and elevation angle) of the scanning or rotating angle of the field of view of the receiving device 1 in the indicator 4 for display. At the other input of indicator 4, the corrected range information is received from the range corrector 5. Range corrector 5 adjusts the range due to the displacement of the object in the direction, for example, to the right or left in azimuth. It consists of: a divider 6, an operational closing device 7, a direction subtractor 8, a permanent storage device 9 and a multiplier 10. The work of the range corrector 5 is as follows. At the time of starting the range measurement from the first output of the receiving device 1, a signal is received in the random access memory 7, which allows reading the recording of directions (azimuth and elevation angle) from the direction sensor 3 at the address issued to the address input of the random access memory 7 from the divider 6. Divider 6 divides the direction information from the direction sensor 3 by a certain number. And at the output of the divider there will be an in-depth meaning of the directions.

 After a time of one review, equal, for example, 2 s, again from the first output of the receiving device 1 receives a signal permission to read-write. During this time, the object will not have time to move beyond the in-depth directions. Therefore, reading and writing will be carried out at one address. As a result, the subtractor 8 receives current information from the direction sensor 3 at one input, and the stored information about directions from the random access memory 7 at the other input. However, the direction subtractor 8 subtracts only one direction (for example, azimuth). Thus, two directions from the direction sensor 3 are needed for storing the address and for display on the indicator, and one direction is needed to determine the displacement of the object in this direction, determined in the subtractor of direction 8. The choice of this or that direction for this purpose may depend on various reasons ( base location, direction of rotation, etc.).

 The magnitude of this offset in the direction enters the read-only memory 9, which outputs a correction factor K to the multiplier 10. If the object does not move, then the value is K 1. Otherwise, K> 1 or K <1. The coarsened range arrives at the other input of the multiplier 10. from the measuring device 2 and the corrected range enters the indicator 4 for display.

 The device can be used in survey and search devices, where the range is determined within a certain time, during which the object has time to move in the direction.

 These include passive locators, direction finders, television and infrared devices. Radars and optical locators emitting, for example, a continuous, single-frequency unmodulated signal (for example, patents N 2003133, 2031284, 2028645, ed. St. N 1751709, patents N 2010264, 2028644, 2002279, ed. St. N 253117, 218509, 219304) . It can also be used for non-contact sizing of moving objects (ed. St. N 1610269, patents N 2030709, 2031262).

Claims (1)

 A location signal processing device consisting of a receiving device, a measuring device, a direction sensor and an indicator, where the first and second outputs of the receiving device are connected respectively to the first and second inputs of the measuring device, and the output of the direction sensor is connected to the first input of the indicator, characterized in that range corrector, consisting of a divider, random access memory, direction subtracter, read-only memory and multiplier, while the output is the removable device through the first input of the range corrector is connected to the first input of random access memory having a second input connected through a divider, the second input of the range corrector with the output of the direction sensor connected through the same second input of the range corrector to the third input of the random access memory and the first input of the subtractor directions, the second input of which and the output, respectively, are connected to the output of the random access memory and through the read-only memory with the first input of the multiplier, the second input and output of which are connected through the third input of the range corrector to the output of the measuring device and through the output of the range corrector to the second input of the indicator.