一种级联嵌入式高分辨力时栅位移传感器

A cascaded embedded high resolution time-gating displacement sensor

针对面向大模数齿轮嵌入式位移传感器分辨力较低的问题,提出了一种级联嵌入式高分辨力时栅位移传感器。利用级联效应将结构优化后的嵌入式时栅位移传感器按照一定规则的空间角度组合,实现次级行波信号与前级行波信号相叠加,即在一个齿距内次级传感信号的位移量为初级传感信号的2倍,以此提升嵌入式时栅位移传感器的分辨力。通过对磁场式时栅位移传感器测量原理的分析,建立了级联嵌入式时栅位移传感器数学模型;利用有限元仿真实验得出与理论分析相同的结果,向位移量中插入更多的时钟脉冲序列可提升分辨力;搭建实验平台验证了次级传感单元分辨力比初级传感单元分辨力提升43%,传感器稳定性提高了75%。

To solve the low resolution of embedded displacement sensor for large module gear,this paper proposes a cascaded embedded high resolution time-grating displacement sensor.The cascade effect enables the optimized embedded time-grating angular displacement sensor to group at a regular spatial angle,which means the secondary traveling wave signal and the primary traveling wave signal are superposed.The displacement of the secondary sensor unit signal within one pitch is twice that of the primary sensor unit signal,improving the resolution of the time-grating angular displacement sensor.After an analysis of the measuring principle of the time-grating angular displacement sensor with magnetic field,a mathematical model of the cascade embedded time-grating angular displacement sensor is built.After a finite element simulation,the experimental results are identical with theoretical calculations and more clock pulse sequences inserted to displacements improve the resolution.An experimental platform is built and results show the resolution of secondary sensor unit improves by 43%compared with that of primary sensor unit,and the stability of the secondary sensor unit is 75%higher than that of the primary sensor unit.