作者：于龙洋, 刘晔, 孙培钦, 张耀匀

作者单位：西安交通大学电气工程学院, 陕西西安 710049

关键词：纳秒量级;FPGA;串口通信;LabVIEW

摘要：

为使测量光电开关发出的数字脉冲宽度的精度达到1 ns和掌握光电开关的实时工作状态。该文通过基于FPGA精确测量法的直接计数法和移相计数法进行测量，得出移相计数法的测量误差在1 ns左右，并验证其设计的正确性和有效性。设计通信系统和上位机软件进行实时监控，通信系统采用成熟的串口RS232通信方式，用PFGA设计串口通信模块，实现将数据传输到工控机；再用LabVIEW编写上位机软件，便于工作人员直观观察数据并存储数据到Excel，实验结果证明测量系统可靠、有效。

A nanosecond level measurement method of pulse width based on FPGA

YU Longyang, LIU Ye, SUN Peiqin, ZHANG Yaoyun

School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Abstract: In order to make the width of digital pulse generated by photoelectric switch reach the precision of 1ns approximately grasp the real-time working state of the photoelectric switch. This paper proposed two FPGA-based accurate measurement methods to measure the precision, directing counting method and phase shift counting method were included. The experiments show that the error of the phase shift counting method is about 1 ns, which verifies its correctness and effectiveness. The communication system and software of IPC were also designed in this paper. The communication system used a RS232 serial interface and the serial communication module transfers data to the IPC was designed by FPGA; IPC software was written by LabVIEW, which enables the data to be observed intuitively and stored to Excel easily. The experimental results show that the design of the system is correct and effective.

Keywords: nanosecond;FPGA;serial communication;LabVIEW

2017, 43(5): 5-10  收稿日期: 2016-09-18;收到修改稿日期: 2016-11-20

基金项目: 

作者简介: 于龙洋(1992-),男,陕西宝鸡市人,硕士研究生,专业方向为控制理论与科学。

参考文献

[1] 苌凝凝,鲁昌华,刘春. 纳秒级周期脉冲信号检测方法的研究[J]. 电子测量与仪器学报,2006,20(4):86-101.
[2] 郭小明,苏进喜,罗承沐,等. 纳秒级脉冲电压的电光测量[J]. 清华大学学报(自然科学版),1997,37(4):65-67.
[3] 仵晓辉,师廷伟,金长江. 基于移相技术的脉冲宽度精确测量方法及FPGA实现[J]. 周口师范学院学报,2012,29(2):108-109.
[4] 王珏,张适昌,严萍,等. 用自积分式罗氏线圈测量纳秒级高压脉冲电流[J]. 强激光与粒子束,2004,16(3):399-404.
[5] ZHANG Y B, JI F, LIU G M, et al. Communication between industrial computer and micro-energy pulse power supply with nanosecond pulse width[C]//International Conference on Advanced Technology of Design and Manufacture. ATDM,2010:413-418.
[6] STENHLM T J, SOINI J T, HÄNNINEN P E. A long-arm autocorelator for measurement of pico-to nanosecond laser pulse widths[J]. Measurement Science and Technology,2004,15(10):1525-1531.
[7] 张志刚. FPGA与SOPC设计教程:DE2实践[M]. 西安:西安电子科技大学出版社,2007:57-65.
[8] 陈传波,杜娟,张智杰. WIN32下基于RS232C协议的串口通信方法及应用研究[J]. 南昌大学学报(工科版),2005, 27(3):71-76.
[9] 杨建伟,郑琼华,沈昱明. 基于LabVIEW的数据保存[C]//第八届工业仪表与自动化学术会议论文集.上海:中国仪器仪表学会,2007:485-489.
[10] 陈锡辉,张银鸿. LabVIEW 8.20程序设计从入门到精通[M].北京:清华大学出版社,2007:97-115.
[11] 施雅婷,郭前岗,周西峰. 一种改进的LabVIEW串口通信系统的实现[J]. 电子测试,2010,8(8):64-70.
[12] HAN X H, KONG X X. The designing of serial comm unication based on RS232[C]//ACIS International Symposium on Cryptography, and Network Security, Data Mining and Knowledge Discovery,E-Commerce and Its Applications, and Embedded Systems. IEEE,2010:382-384.
[13] MACHACEK J, DRAPELA J. Control of serial port(RS-232) communicaton in LabVIEW[J]. Modern Technique and Technologies,2008(37):121-127.