Research on the measurement accuracy of different laser spot center location

2019 ◽  
Author(s):  
Jie Zhang
Keyword(s):  
Measurement Accuracy ◽  
Laser Spot ◽  
Spot Center ◽  
Center Location

A New System for Measuring Bridge Deflections Based on Laser Imaging Process

2011 ◽  
Vol 143-144 ◽  
pp. 211-215 ◽  
Author(s):  
Fang Cui ◽  
Yun Fei Wang
Keyword(s):  
Measuring System ◽  
Laser Spot ◽  
Zoom Lens ◽  
Steel Bridge ◽  
Laser Imaging ◽  
Spot Center ◽  
Measuring Bridge ◽  
Center Location ◽  
Dial Test ◽  
New System

A new system for measuring bridge deflections based on laser imaging process is introduced. Firstly, principle of this system is analyzed with geometrical optics theory. Secondly, hardwares of measuring system are illuminated in detail, and the key software problems are discussed, including laser spot center location and accurate control of motorized TV zoom lens. The laser spot center location is realized by using image fuzzy edge extraction algorithm and Hough transform algorithm. The accurate control of motorized TV zoom lens' motors is realized by using a control-driving card based on ISA bus. At last, the contrastive experiments are operated on a certain continuous steel bridge with this system and dial test indicator. The experimental results show that this system is equal precision with dial test indicator, and can get over defects of traditional measuring methods. The security and reliability is much higher relatively and the precision can match to the engineering requirement.

Laser spot center location algorithm of four-quadrant detector based on Gaussian distribution

2017 ◽  
Vol 46 (2) ◽  
pp. 206003 ◽  
Author(s):  
唐彦琴 Tang Yanqin ◽  
顾国华 Gu Guohua ◽  
钱惟贤 Qian Weixian ◽  
陈 钱 Chen Qian ◽  
张 骏 Zhang Jun
Keyword(s):  
Gaussian Distribution ◽  
Laser Spot ◽  
Spot Center ◽  
Center Location ◽  
Location Algorithm ◽  
Four Quadrant

Laser spot center location algorithm of four-quadrant detector based on Gaussian distribution

2017 ◽  
Vol 46 (2) ◽  
pp. 206003
Author(s):  
唐彦琴 Tang Yanqin ◽  
顾国华 Gu Guohua ◽  
钱惟贤 Qian Weixian ◽  
陈 钱 Chen Qian ◽  
张 骏 Zhang Jun
Keyword(s):  
Gaussian Distribution ◽  
Laser Spot ◽  
Spot Center ◽  
Center Location ◽  
Location Algorithm ◽  
Four Quadrant

scholarly journals Optimized algorithm of laser spot center location in strong noise

2005 ◽  
Vol 13 ◽  
pp. 312-315 ◽  
Author(s):  
J W Cui ◽  
J B Tan ◽  
L Ao ◽  
W J Kang
Keyword(s):  
Laser Spot ◽  
Spot Center ◽  
Center Location

Precise Location of Laser Spot Center Based on Residual Pruning

2008 ◽  
Vol 28 (12) ◽  
pp. 2311-2315 ◽  
Author(s):  
卢泉 Lu Quan ◽  
刘上乾 Liu Shangqian ◽  
王会峰 Wang Huifeng
Keyword(s):  
Laser Spot ◽  
Precise Location ◽  
Spot Center
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