A laser active tracking system and tracking method

Abstract

The invention discloses a laser active tracking system and tracking method. The system includes a laser marker, a spot test unit and a data transmission unit; the spot test unit includes a receiving mirror, a four-quadrant photodetector, a CCD imaging detector and an acquisition and processing circuit; the laser After the emitted pulsed laser irradiates the target, the CCD processing unit processes the CCD imaging detector to obtain the spot image; the acquisition processing circuit collects and processes the output electrical signal of the four-quadrant photodetector to obtain the coordinates of the center of mass of the spot; the spot image and the center of mass of the spot The coordinates are sent to the remote control center through the digital transmission unit; the active tracking system of the present invention integrates a four-quadrant detector, a CCD image sensor and a target pointing laser, and the target pointing laser emits pulsed laser light to realize the comprehensive test of the laser spot And target tracking, providing target parameters and decision-making reference for the precision 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 a 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 four-quadrant laser spot tracking (LST), laser spot tracking camera (CCD), and laser target marker. The laser active tracking technology provides the tracking system with real-time information of the precise position of the target through the laser lighting 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 active laser tracking system is installed on helicopters or fixed-wing aircraft to provide target indications and visual symbols for important target threats for guided and unguided weapons. The guidance system for fighters to provide precision strikes is a very...

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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