Design And Implementation Of Laser Code Timing Detector

The laser guided weapons are widely used in precision guided weapons.Laser coding technique is one of the key technologies of laser guided weapon.On the one hand,to enhance the anti-interference ability, laser guided weapon adopts advanced narrow port door technology and relatively complicated coding technology.On the other hand,the prerequisite of implementing active countermeasures for laser guidance signal pulse code.Countermeasure equipment takes the pulse arrival time of the laser signal as parameter to analyze various current code patterns and their identification methods and thus decode the code signals of the enemy so as to emit deception jamming signal and to make effective jamming of enemy laser guided weapons.Therefore, research on the laser code pattern timing sequence inspection equipment has great theoretical and realistic significances in the laser guided weapon and confrontation sectors.This paper firstly analyzed the current research status, development prospect and corresponding research achievements in the working sector of laser code pattern timing sequence inspection work;then it proposed the designing method for the laser code pattern timing sequence inspection device, that is, realizing the laser code pattern timing sequence analysis through the combined calculation of FPGA chip and DSP chip. Among them, FPGA is responsible for the distribution and coordination of the electric circuit and the pre-treatment of the laser pulse. DSP takes charge of the calculation of the code pattern timing sequence inspection identification algorithm and outputs the calculation result through LCD and submits to the upper computer.According to the above,the hardware circuit of the laser code pattern timing sequence inspection device is designed and completed.Then the work process of the laser pulse code recognition algorithm is designed,and the SDIF algorithm is analyzed and simulated.On this basis,the software of the DSP and FPGA has been designed respectively and the debugging of software and hardware has been done.At last,the paper manufactured the laser code pattern timing sequence inspection sample machine,carried out a performance test on the sample machine,tested the parameters and functions of this machine and proved that the tested performance and indicators meet the designing requirements. This subject object was completed satisfactorily.