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光幕靶测速仪校准规范

光幕靶测速仪校准规范
光幕靶测速仪校准规范

光幕靶测速仪校准规范Calibration specifications for speedmeter of photoelectric screen target

一种双光幕弹丸测速系统设计与实现

电子器件 Chinese Journal of Electron Devices 第39卷第1期2016年2月Vol 39No.1 Feb.2016A Dual -Light Screen Bullet Velocity Measuring System Design and Implementation * JIANG Xudong 1,2,LI Jinming 1,2*,QIN Li 1,2,GAO Genwei 1,2,HE Yunze 3 (1.National Key Laboratory for Electronic Measurement Technology ,North University of China ,Taiyuan 030051,China ; 2.Key Laboratory of instrumentation Science &Dynamic Measurement of Ministry of Education ,North University of China ,Taiyuan 030051,China ; 3.School of Information and Communication Engineering ,North University of China ,Taiyuan 030051,China ) Abstract :In modern weapons research ,high precision measurement of bullet velocity is indispensable ,a Dual -Light Screen Velocity Measurement System (LSVMS )was designed which is composed of hardware and software.The system takes FPGA as the control core ,implementing the conditioning and acquisition of current signal from front light screen sensor by controling hardware circuit ,then the data will be stored and uploaded to the host com?puter through the network port.The design adjusts the signal to zero by software ,which solves the problems of insta?bility of adjusting to zero by traditional hardware and uses way of bomb bottom trigger to timing ,which improves the accuracy of the velocity of the https://www.doczj.com/doc/4d6403451.html,pared with the traditional velocity measurement system ,the system is more accurate and more flexible.After several tests and experiments ,the system has been successfully applied to the development of a military product. Key words :LSVMS ;FPGA ;zero -adjustment by software ;bomb bottom trigger EEACC :7320E doi :10.3969/j.issn.1005-9490.2016.01.036 一种双光幕弹丸测速系统设计与实现* 江旭东1,2,李锦明1,2*,秦丽1,2,高根伟1,2,何蕴泽3 (1.中北大学仪器科学与动态测试教育部重点实验室,太原030051; 2.中北大学电子测试技术重点实验室,太原030051; 3.中北大学信息与通信工程学院,太原030051)摘要:在现在代武器的研究中,需要对弹丸速度进行高精度测量,因此设计了一种软硬件结合的双光幕测速系统。整个系统以FPGA 为控制核心,通过控制硬件电路实现对前端光幕传感器电流信号的调理及采集,之后将数据存储并通过网口上传到上位机。设计中对转换后的信号进行了软件调零,解决了传统硬件调零不稳定的问题,同时采用弹底触发的方式进行计时,提高了弹丸测速的准确性。与传统测速系统相比,该系统具有精度高、灵活性好等优点。通过多次测试与实验,该系统满足实际工程应用的要求。 关键词:光幕测速;FPGA ;软件调零处理;弹底触发 中图分类号:TN919文献标识码:A 文章编号:1005-9490(2016)01-0172-04 随着光电事业的不断提高,弹丸测速技术也在不断的发展。由于传统接触测量的测量精度低、重复性差等问题,非接触测量已成为主流测量技术。非接触弹丸测速方法主要是利用计时仪和区截装置(线圈靶、光幕靶、天幕靶等)来测量弹丸速度,记录弹丸飞过截取装置的不同截面间的响应时间,而截取平面间的距离是已知的,距离除以时间就可以得 到弹丸的平均速度[1-2]。目前电子计时仪精度较高, 能够满足测速要求。但每个测速系统都要包括区截 装置和计时仪两部分,系统复杂度高、成本大,而且 对计时仪的要求较高。由此提出了一种双光幕弹丸 测速系统。实时检测并记录弹丸穿过光幕靶时的输 出信号,并用软件的方式实现弹底触发计时,代替测 时仪记录两个信号间的时间间隔,实现弹速测量。———————————— 项目来源:山西省自然科学基金项目(2014011021-5) 收稿日期:2015-04-25修改日期:2015-05-27

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