摘要
提出用双光栅产生的莫尔条纹测量船体扭转角,对此方法进行实验验证。船体用焦距为550 mm的平行光管模拟,设计微调旋转机构使平行光管产生小角度转动,模拟船体扭转角的产生;两光栅分别安置于两平行光管焦面上,光管相对扭转引起莫尔条纹变化,根据测量原理通过图像的变化求得船体扭转角测量值。给出实验设备布置方案、实验操作原理、实验数据处理的基本思想,及提高数据处理精度的关键问题。对不同的条纹初始宽度做了对比实验,处理结果表明当莫尔条纹越细时,测量精度越低;当莫尔条纹越宽时,测量精度越高,本实验允许的条件下,扭转角最高测量精度达到1.2″。
Moiré fringe generated by two gratings was used to measure ship torsion and the method was tested by experiments. Ship is simulated by parallel light pipe with focus of 550 ram, and a micro-tune rotary mechanism is designed to make the light pipe simulate ship torsion. Two gratings are placed on the focus plane of the light pipe; the torsion of the light pipe causes the Moir6 fringe image to change, and the torsion measurement value can be obtained from the change of the image. The experiment equipment layout, principal of the experiment operation, the basic idea of data processing, and the key issues for enhancing data processing precision are presented. Comparison experiments for different moiré fringe widths were carried out. Experiment result shows that the Moiré fringe is thinner, the precision is lower, the moiré fringe is wider, the precision is higher, and the highest precision reaches to 1.2 in the experiment.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2008年第10期2211-2215,共5页
Chinese Journal of Scientific Instrument
关键词
莫尔条纹
船体扭转实验
数据处理
测量精度
Moiré fringe
ship torsion experiment
data processing
measurement precision
作者简介
李向荣，2000年于长春理工大学获学士学位，2003年于长春理工大学获硕士学位，2006年于长春光机所获博士学位，现为青岛科技大学副教授，主要研究方向为检测与图像处理。地址：青岛市松岭路69号机电学院，266061电话：0532—89939713；E—mail：lxrbest@126．com
