摘要
在分析了数控机床线位移反馈装置的基础上,提出了一种光学条码位移传感器。由于单轨绝对编码技术的制约,光栅尺的编码长度难以扩展。为了实现大量程编码,基于光学条码定位技术的研究,设计了一种新型的高精度大量程绝对条码尺。介绍了多周期等间隔条码的编码方案和解码方法,对条码尺的量程扩展进行了可行性分析。利用专用嵌入式系统和相关器件实现了条码位移传感器系统的设计,并给出了实际测量结果。实验数据表明,该传感器系统的分辨率可以达到1μm,精度为±5μm,最大测量长度可达2m。
Based on the analysis of the linear displacement feedback device of the numerical control machine tool,an optical bar code displacement sensor was proposed. Due to the restriction of single absolute encoding technology,it is difficult to extend the length of the encoder. In order to achieve a large range of coder,a new type of high-precision and large-range absolute bar code was designed based on the research of optical bar code positioning technology. In this paper,the coding scheme and decoding calculation method of multi period and equal interval bar codes are introduced,the scale expansion of bar code is carried out.The design of the sensor measurement system is realized by using the special embedded microcontroller and related devices. Though experiment,the actual measurement results are given. Experimental data show that the resolution of the displacement sensor system is 1μm,and the accuracy is ± 5μm. The maximum measurement length of bar code is 2m.
作者
那启跃
冯波
王志兴
NA Qi-yue FENG Bo WANG Zhi-xing(School of Science, Nanjing University of Science and Technology, Nanjing 210094, China)
出处
《组合机床与自动化加工技术》
北大核心
2017年第9期16-18,22,共4页
Modular Machine Tool & Automatic Manufacturing Technique
关键词
绝对光栅尺
条码尺
绝对位移
absolute grating ruler
bar code
absolute displacement
