基于互相关的大型机组轴系激光对中微弱信号提取方法研究

发布时间：2018-04-14 13:01

本文选题：仪器仪表技术 + 激光对中仪　；参考：《兵工学报》2017年10期

【摘要】：为提高自主研发的大型机组轴系激光对中仪的对中精度,减少由位置检测单元(PSD)受杂散光干扰引起的误差,提出一种基于互相关算法的微弱信号提取方法。建立基于互相关算法的数学模型,并设计模拟电路,实现了大型机组轴系激光对中仪的位置误差补偿;搭建实验测试系统获取PSD坐标数据,使用二维精密微位移平台进行重复性实验验证,对测量数据进行分析。实验结果表明,该方法可以在自然光照条件下保证设备的精度,分辨力在0.005 mm内,可以有效地提高大型机组轴系激光对中仪对外界噪声的抗干扰性能。
[Abstract]:In order to improve the accuracy of the self-developed laser alignment instrument for shafting of large units and reduce the error caused by stray light interference in position detection unit (PSD), a method of weak signal extraction based on cross-correlation algorithm is proposed.The mathematical model based on cross-correlation algorithm is established, and the simulation circuit is designed to compensate the position error of the laser centering instrument for the shafting of a large unit, and the experimental test system is built to obtain the PSD coordinate data.The two-dimensional precision micro-displacement platform was used to verify the repeatability and the measured data were analyzed.The experimental results show that this method can ensure the accuracy of the equipment under natural illumination and the resolution is within 0.005 mm. It can effectively improve the anti-interference performance of the laser centering instrument to the external noise in the shafting of a large unit.
【作者单位】：长春理工大学机电工程学院;
【基金】：吉林省科技发展计划项目(20100365) 兵器科技研究项目(62201040504-A)
【分类号】：TH744.5

【相似文献】