锁相倍频细分中光栅位移跟踪速度与分辨率的关系  

Relationship between Displacement Tracking Speed and Resolution of Grating Based on Phase-Lockded Multi-Frequency Subdivision

作　　者：郭雨梅[1] 孟凡波[1] 邱燕霖 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870 [2]中国民用航空东北地区空中交通管理局,辽宁沈阳110043

出　　处：《仪表技术与传感器》2012年第11期136-138,共3页Instrument Technique and Sensor

基　　金：辽宁省科技攻关资助项目(2006219005);沈阳市科技局科技支撑计划资助项目(1081229-1-00)

摘　　要：针对光栅传感器信号细分时普遍存在的分辨率提高、位移跟踪速度下降这一现象,基于锁相倍频细分方法研究了光栅位移跟踪速度与分辨率之间的关系。以50线/mm的普通光栅尺为例,利用FPGA芯片的底层嵌入模块74297实现了对光栅信号的锁相倍频细分。研究了锁相倍频细分电路的截止频率,推导出光栅跟踪速度与分辨率的数学关系。利用Quartus II软件搭建了锁相倍频细分电路,利用Simulink工具箱对该电路进行了建模和仿真,验证了所得结果的正确性,为设计高分辨率、高位移跟踪速度的数字集成化光栅数显装置奠定了基础。The common phenomenon which the resolution increases and displacement tracking speed reduces arises when fractionize signal of grating sensor.Research the relationship between displacement tracking speed and resolution of grating based on phase-lockded multi-frequency subdivision.Taking the 50 lines/mm grating for example,using low level embedded module 74297 of FPGA to achieve the phase-lockded multi-frequency subdivision of grating.Study the cut-off frequency of phase-lockded multi-frequency subdivision circuit and derive the mathematical relationship of grating tracking speed and resolution.Using Quartus II software builds the phase-lockded multi-frequency subdivision circuit and using Simulink toolbox builds model and simulates the subdivision circuit to verify the correctness of the findings which confirms foundation of the design of high resolution,high displacement tracking speed digital integrated grating digital display device.

关 键 词：光栅传感器 细分 跟踪速度 分辨率 锁相倍频 

分 类 号：TN911[电子电信—通信与信息系统]