RU2469350C2 - Radar monitoring device - Google Patents

Abstract

FIELD: radio engineering.

SUBSTANCE: radar monitoring device includes in-series connected radio circuit of radar station (RS), stroboscopic converter containing stroboscopic mixer and low-frequency filter, information recording and processing unit, as well as strobe shaper consisting of reference frequency generator and envelope shaper; besides, the above device also includes current azimuth sensor, unit with coefficient table and coincidence circuit, to one of the inputs of which current azimuth sensor is connected, and to the other one - unit with coefficient table; output of coincidence circuit is connected to input of strobe shaper the output of which is connected to one of the inputs of stroboscopic converter, and output of RS radio circuit is connected to the other input.

EFFECT: eliminating information redundancy of reflected signal of radar station.

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Description

The present invention relates to the field of radio engineering and can be used for radar survey of areas of space, predetermined by a terrain map.

A prior art device for stroboscopic processing of radar information is known, which consists of a radar receiver (radio path), a stroboscopic converter, a gate generator and an information recording and processing unit [1]. The disadvantage of this technical solution, for example, for radar observation of an object extended along the viewing angle, occupying a small range of ranges for each angle of rotation of the radar station beam, such as a river, road, border, is the presence of a large number of radars in the response to the probe pulse redundant information that is not relevant to the interval of interest. This increases the requirements for devices for processing and analyzing data from radar surveillance systems, worsens their technical and economic indicators.

The task to which the radar monitoring device is aimed is to eliminate the information redundancy of the reflected radar signal. This reduces the requirements for speed and broadband path processing information about the target.

This problem is solved due to the fact that the radar monitoring device, consisting of sequentially connected radar path, a stroboscopic converter, an information recording and processing unit, and a strobe generator, the output of which is connected to one of the stroboscopic converter inputs, contains a matching circuit, one input of which connected to the sensor of the current azimuth, and the other to the block with a table of coefficients that determine the boundaries of the strobe movement for a given azimuth, and the output of the adenomas connected to an input of the gates.

The technical result provided by the given set of features is the elimination of information redundancy, achieved due to the fact that only part of the reflected signal period is subjected to stroboscopic processing, which corresponds to a range of distances for a given angle map for a given angle of rotation (azimuth) of the radar beam or a time interval of reflected signal, and this interval is much shorter than the total duration of the signal reflected from the terrain [2]. To use the stroboscopic processing of the reflected signal, its repeatability is required, which is achieved by periodic emission of the radar probe signal.

Figure 1 shows a block diagram of a radar monitoring device, consisting of a radar path (1), a stroboscopic transducer (2) containing a stroboscopic mixer (2.1) and a low-pass filter (2.2) tuned to the differential carrier frequency, gate shaper (3) including a reference frequency generator (3.1) and an envelope generator (3.2), an information recording and processing unit (4), a matching circuit (5), a current azimuth sensor (6) and a block with a coefficient table (7).

The device operates as follows. The reflected signal from the output of the radar path (1) is fed to one of the inputs of the stroboscopic converter (2). A signal from the gate generator (3) is supplied to the other input, and depending on the angle of rotation of the radar antenna received from the current azimuth sensor (6), the matching circuit (5), according to the corresponding values from the block with the coefficient table (7), sets the time interval for movement strobes for a given azimuth. As a result of the gating of a separate interval of the reflected signal and low-pass filtering, an envelope stretched in time at the difference frequency appears at the output of the stroboscopic converter (2), since the time scale of a certain interval of the radio signal is transformed. After that, the signal transformed in time is introduced into the information recording and processing unit (4). Thus, in the information recording and processing unit (4) only information about the range of distances of interest falls.

The number of required repetition periods of the probe signal for stroboscopic processing with this setting of the position of the gates is reduced and is determined only by the compression ratio of the spectrum [2].

Information sources

1. Naydenov A.I. Transformation of the spectrum of nanosecond pulses. - M: Owls. Radio, 1973. - P.46 (prototype).

2. Zakharchenko V.D. Balandin P.V. The method of radar control of an extended section of space. RF patent 2359286 dated 06/20/2009 // Inventions. Utility models [Electronic resource]. - 2009 .-- 17.

Claims (1)

A radar monitoring device, consisting of a radar radio link in series, a stroboscopic converter containing a stroboscopic mixer and a low-pass filter, an information recording and processing unit, and a strobe generator consisting of a reference frequency generator and an envelope shaper, characterized in that three blocks are introduced, the first - current azimuth sensor, the second is a block with a table of coefficients and the third is a coincidence circuit, one of the inputs of which is connected to the current azimuth sensor one and the other is a block with a coefficient table, and the output of the matching circuit is connected to the input of the gate generator, the output of which is connected to one of the inputs of the stroboscopic converter, and the output of the radar path of the radar is connected to the other input, while the output of the stroboscopic converter is connected to the input of the registration unit and information processing.

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