非接触光电式测速系统的研究  

Research of non-contact photoelectric speed measurement system

作　　者：高亮 张伟光[1] 蔡志伟 孙立超 丛伟 GAO Liang;ZHANG Weiguang;CAI Zhiwei;SUN Lichao;CONG Wei(School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150028,China)

机构地区：[1]哈尔滨师范大学物理与电子工程学院,黑龙江哈尔滨150028

出　　处：《传感器与微系统》2020年第9期27-30,共4页Transducer and Microsystem Technologies

摘　　要：设计了一种基于光电技术的网格测速法,将物体的位移分解到x、y两个相互垂直的方向上,并转化为相应的脉冲电信号。利用置信区间、以及不同时刻物体位移间的相关性设计了一种抗干扰测速算法,分析该电信号并计算出物体的瞬时速度,通过无线传输在上位机上实时显示。实验结果表明:当单片机采样频率固定时,通过选择合适的测速网格,可以准确地测出物体的运动速度。A grid speed measurement method based on photoelectric technology is designed.In this method,the displacement of the object is decomposed into two perpendicular directions of x and y,and then converted into corresponding pulse electrical signals.An anti-interference speed measurement algorithm is designed by using confidence interval and the correlation between object displacements at different times.The electrical signal is analyzed,and instantaneous speed of the object can be calculated,and is displayed on the upper personal computer(PC)in real time through wireless transmission technology.The experimental results show that the motion velocity of the object can be measured accurately by selecting the appropriate speed measuring grid when the micro-control unit(MCU)sampling frequency is fixed.

关 键 词：测速 信号采集 光电信号转换 位移 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]