自消除激光破片测速仪误触发的算法  

An Algorithm Designed for Automatically Eliminating the False Trigger of Laser Fragments Velocimeter

作　　者：曹勋[1] 赵冬娥[1] 张斌[1] 刘小彦[1] 李佳潞[1] 史晓军 王利勇 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]晋西工业集团有限责任公司,山西太原030027

出　　处：《火炮发射与控制学报》2016年第1期79-82,共4页Journal of Gun Launch & Control

基　　金：教育部科学技术研究重点项目(No.211027);山西省研究生优秀创新项目(No.20143080)

摘　　要：针对现有采用内触发方式的JGM-P400激光破片测速仪在战斗部野外静爆试验中存在误触发现象,在对静爆试验中破片过靶信号为正向脉冲信号进行理论分析和建模仿真基础上,提出了基于过靶信号脉冲宽度的自消除系统误内触发算法。通过设置合适的过靶信号脉冲宽度阈值T_S,给出内触发有效与否的判决表达式,并做算法的FPGA实现。测试结果表明:设置阈值T_S为100μs时,该算法能有效判别系统内触发是否有效,并自动消除误触发现象,保证了激光破片测速仪测得的数据正确、可靠。In response to the existing false trigger phenomena of laser fragments velocimeter JGM-P400 through internal trigger mode and based on the theory and simulation analysis of the signal as the fragments flying across the laser screen in the warhead static explosive experiment,an algorithm is put forward which could automatically eliminate system false trigger based on signal pulse width. Through setting the appropriate threshold of the signal pulse width T_S,a conclusion is reached whether the internal trigger is judged valid or not by offering an expressive formula and conducting the FPGA implementation of the algorithm. Test results show that this algorithm can not only judge but also eliminate the system false trigger automatically when the T_S is 100 μs,which guarantees the correctness and reliability of the data measured by the velocimeter.

关 键 词：信息处理技术 激光破片测速仪 误触发 过靶信号 脉冲宽度 

分 类 号：TN247[电子电信—物理电子学]