双路信号相位同步测量系统设计与实现  

Design and implement of a synchronous phase measurement system for dual-channel signals

作　　者：杜志广[1] 颜树华[1] 林存宝[1] 王国超[1] 魏春华[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院仪器科学与技术系,长沙410073

出　　处：《激光技术》2016年第3期315-319,共5页Laser Technology

基　　金：国家自然科学基金资助项目(51275523)

摘　　要：为了实现2维外差干涉位移测量中信号相位的精确同步探测,采用整周期计数与脉冲填充相结合的方法,利用同一时钟基准,对双路信号进行同步检测与并行处理,设计并实现了一种基于现场可编程门阵列的双路外差干涉信号相位同步测量系统。该系统在100k Hz载波频率下测量分辨率可以达到0.18°,双路信号下的相位同步测量误差同样为0.18°。结果表明,该系统实现了整小数相位的精确测量,确保了双路信号相位的实时同步探测,能够满足各种2维外差干涉位移测量系统对相位同步测量的需求。Absrt act： In order to realize precise synchronization detection of signal phase for 2-D heterodyne interference displacement measurement , based on the combination of the whole cycle counting and the pulse stuffing methods , a dual-channel synchronous heterodyne signal phase measurement system based on field programmable gate array was designed and implemented by utilizing the same clock reference to detect synchronously and process the dual -channel signals parallelly .The results demonstrate that the resolution of 0.18°is realized with carrier frequency of 100kHz, and the phase synchronization measurement error of 0.18°is achieved for dual-channel signal detection .Accurate measurement of integral and fractional phases was realized by the system . Meanwhile , the real-time synchronous measurement of dual-channel signal phase was then guaranteed .It indicates that the developed system can fulfill the requirement of various 2-D heterodyne interference displacement measurement applications .

关 键 词：测量与计量 相位测量 双路同步 脉冲填充 外差干涉 

分 类 号：TH744.3[机械工程—光学工程]