基于测量基准变换的增量直线式时栅传感器研究

发布时间：2018-08-25 09:43

【摘要】：针对目前绝对直线场式时栅无法满足全闭环数控系统要求的增量式直线位移反馈的问题,采用测量基准转换方式从时间域的角度处理绝对直线场式时栅的空间位移信息,运用时间序列算法分析绝对式时栅采样数据序列的内在相关性,建立自适应递推算法。通过时间触发采样将时栅传感器过去的测量数据作为样本集,递推时栅下一个采样时刻的位移,在下一个采样周期内将直线时栅的绝对位移代表的增量式时间脉冲通过脉宽调制的方式连续发出,实现绝对式直线时栅到增量式直线时栅位移传感器的转换设计。实验表明在76.604 mm的范围内增量式直线时栅位移传感器达到±2μm的测量精度。此研究可将原绝对式直线时栅位移传感器运用于全闭环增量式直线运动数控系统,具有重要现实意义。
[Abstract]:In order to solve the problem of incremental linear displacement feedback which can not meet the requirements of the complete closed loop NC system at present, the measurement datum conversion method is used to deal with the spatial displacement information of the absolute linear field time grating from the point of view of time domain. The time series algorithm is used to analyze the intrinsic correlation of absolute time grid sampling data sequence, and an adaptive recursive algorithm is established. By time-triggered sampling, the past measurement data of the time-grating sensor are taken as the sample set, and the displacement of the next sampling time of the time-grid is recursively derived. In the next sampling period, the incremental time pulse represented by the absolute displacement of the linear time grating is continuously sent out through the pulse width modulation mode, and the conversion design of the absolute straight line time grating to the incremental linear time grating displacement sensor is realized. The experimental results show that the measuring accuracy of the grating displacement sensor is 卤2 渭 m when the incremental linear displacement sensor is in the range of 76.604 mm. This study can apply the original absolute linear time grating displacement sensor to the full closed loop incremental linear motion numerical control system, which has important practical significance.
【作者单位】：重庆理工大学机械检测技术与装备教育部工程研究中心时栅传感及先进检测技术重庆市重点实验室;
【基金】：国家自然基金(51435002,51305478) 重庆市基础与前沿研究计划(cstc2016jcyj A0505) 重庆高校创新团队建设计划(CXTDX201601029)项目资助
【分类号】：TP212

【相似文献】