Laser active tracking system and tracking method

Abstract

The invention discloses a laser active tracking system and tracking method. The system comprises a laser marker, a light spot test unit and a data transmission unit. The light spot test unit comprisesa receiving mirror, a four-quadrant photoelectric detector, a CCD imaging detector and an acquisition processing circuit; after pulse laser emitted by the laser irradiates a target, the CCD processing unit processes the CCD imaging detector to obtain a light spot image; the acquisition processing circuit acquires and processes an output electric signal of the four-quadrant photoelectric detectorto obtain a light spot centroid coordinate; the light spot image and the light spot centroid coordinate are sent to a far-end command and control center through the data transmission unit; according to the invention, the active tracking system integrates the four-quadrant detector, the CCD image sensor and the target indication laser together; the target indication laser emits pulse laser; comprehensive testing and target tracking of laser spots are achieved, and target parameters and decision basis reference are provided for accurate strike of semi-active guided weapons.

Description

technical field [0001] The invention belongs to the technical field of laser tracking, and mainly relates to an active tracking system and tracking method based on a four-quadrant detector, a CCD image sensor and a target indicating laser. Background technique [0002] The laser active tracking system consists of a four-quadrant laser spot tracking (LST), a laser spot tracking camera (CCD), and a laser target marker. Laser active tracking technology provides the tracking system with real-time information on the precise position of the target through the laser illumination mark of the target position. [0003] In the application of laser semi-active guided weapons, it is necessary to track the strike target. Usually, the laser active tracking system is installed on a helicopter or a fixed-wing aircraft to provide visual symbols for target indication and important target threat reminders for guided and unguided weapons. Combatants provide a guidance system for precision strik...

AI Technical Summary

Problems solved by technology

[0004] At present, the core technology in laser active tracking is how to measure the laser peak signal through four-quadrant photodetectors, "an optical precision tracking detector based on dual four-quadrant detectors (Chinese patent 200910093364.8)" and "a laser spot and return Wave tracking and monitoring device (Chinese patent 201811336974.1), all of which involve the above-mentioned applications, the common problem is that the captured signal is a solid-state laser pulse signal with a pulse width of 10-20ns and a repetition rate of 10-20Hz. There are mainly two methods of pulsed laser spot detection: peak hold and high-speed acquisition. The peak hold is to widen the nanosecond pulse signal incident on the detector to the microsecond level, and then use low-speed data acquisition for acquisition. The existing problem is that this This kind of broadening is based on the peak intensity of the pulse, which reduces the difficulty of data acquisition, but cannot guarantee the linearity and dynamic range of data acquisition, and cannot reflect the real parameters of the laser spot

In comparison, high-speed acquisition is an accurate solution, but for 10ns pulse signals, the ADC sampling rate of the sampling system needs to reach 1GS / s or more, coupled with a large amount of data from the image sensor, in tens of seconds to minutes Continuous work brings difficulties to data storage, real-time display and background upload, which ultimately affects the accuracy and real-time performance of spot tracking

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