Target detection system and detection method of a radar-assisted infrared sensor

Abstract

The invention discloses a system for detecting targets by the aid of radar-assisted infrared rays. The system mainly comprises an infrared independent tracking module, an infrared / radar collaborative tracking module, a radar radiation control module and a tracking mode selecting and switching module. The system has the advantages that radiation on-off strategies are pertinently provided, so that the difficult problem of timely starting and stopping radiation during intermittent radiation can be effectively solved, the radar radiation time can be effectively shortened on the premise that the targets can be assured to be accurately attacked by combat aircrafts, and the invisibility of the aircrafts and a target detection effect can be balanced.

Description

technical field [0001] The invention relates to the field of avionics technology, in particular to a radar-assisted infrared sensor target detection system, which is suitable for a new generation of stealth fighters to use radar / infrared sensor cooperative detection of targets. Background technique [0002] Radar sensors detect targets by means of external radiation energy, but the external radiation makes them face the threat of anti-radiation missiles. Therefore, when combat aircraft fly to the target area, in order to conceal the enemy, the airborne avionics system mainly uses infrared sensors. Reduced use of radar sensors. Infrared sensors can obtain the angle information of the target, but lack the target distance information. In order to supplement the dimension of target information, the radar sensor burst radiation ranging, without destroying the stealth of the aircraft, can realize the precise tracking of the target during the contact stage. [0003] Radar-assiste...

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Problems solved by technology

[0004] In terms of multi-sensor cooperative tracking and radiation control strategies, scholars at home and abroad have carried out a lot of research. Baud et al. proposed a radiation control method based on tracking quality. The tracking quality is judged by the target residual norm. The maneuvering target has strong robustness, but when the tracking diverges, the distance dimension will exceed the threshold earlier than the target residual norm, and the tracking quality method does not pay enough attention to the distance dimension

Cheng Yongmei and others use the singer model to track the target distance, azimuth, and pitch separately in the polar coordinate system, and determine the radar switch through the distance prediction covariance. This method makes full use of the distance channel information, but during the radiation stop period The target is maneuvering, and there will be problems with tracking

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