图像式角位移测量污染检测和误码校正研究
Research on Contamination Detection and Error Code Correction of Image-Based Angular Displacement Measurement
刘继帅 1贾兴丹 1纪越 1万秋华2
作者信息
- 1. 天津工业大学控制科学与工程学院,天津 300387
- 2. 中国科学院长春光学精密机械与物理研究所,吉林 长春 130033
- 折叠
摘要
为了提升光电角位移测量装置的可靠性和准确性,在码盘受污染时能够正常译码,开展了图像式角位移测量的污染检测和污染导致的误码实时校正方法研究.首先,介绍了角位移测量原理以及污染对角位移测量的影响;随后,为检测图像式角位移测量中的码盘污染并实时校正因码盘污染产生的误码,提出了检测-校正-推测(DCAF)的方法和区域像素扫描的方法,分别对粗码、精码区进行污染检测和误码实时校正,在校正过程中,设计了新的精码道编码方式;最后,对所提出的污染检测和误码实时校正方法进行实验验证.实验结果表明,该方法能够对污染进行检测并对其产生的误码进行实时校正,研究对提高角位移测量的可靠性和准确性具有重要意义.
Abstract
To improve the reliability and accuracy of photoelectric angular displacement measuring device and enable proper decoding in the case of contamination,this paper investigates contamination detection and real-time correction methods for contamination-induced error codes in image-based angular displacement measurements.First,the principles of angular displacement measurement and the effects of contamination on this measurement are presented.Then,to detect the code disk contamination and correct the resulting error codes in real-time,the detection-correction-conjecture and area pixel scanning methods are proposed for the rough and precision code areas,respectively,in the course of correction,a new precise coding method is designed.Finally,the proposed contamination detection and real-time error code correction methods are experimentally validated.Results show that the proposed method can detect contamination and correct the resulting error codes in real time.This research is important for improving the reliability and accuracy of angular displacement measurements.
关键词
图像式角位移测量/可靠性/污染检测/误码校正Key words
image-based angular displacement measurement/reliability/contamination detection/error code correction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据