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�������պ����ѧѧ�� 2007, Vol. 33 Issue (03) :322-326    DOI:
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High-accuracy measuring system for position and attitude in pushing-bridge construction based on machine vision
Li Chao, Li Yunhua*
School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The feature of the present measuring system for position and attitude in pushing-bridge construction was analyzed and the system’s primary problems were specified. Directed by all the problems and on-site requirements, a kind o f photoelectric measuring system composed of CCD sensors, laser collimator and i nclinometer was developed based on computer visual feedback. After the system’s mathematical model has been built, the hardware work station was finished. In t he process of software functional modules’ development, such key technologies a s video acquisition, image processing and the implementation of multiple serial ports’ communication were introduced in detail. Characterized by high accuracy, real-time, simple operation, convenient maintenance and low cost, the measuring system can substitute for the past manual measuring operation. Furthermore, the system’s implementation also provides new technology for the design of other l arge-scale construction’s measuring systems.
Keywords�� position measurement   computer vision   image processin g     
Received 2006-03-13;
Fund:

��������Ȼ��ѧ����������Ŀ(3052011)

About author: �� ��(1979-),��,ɽ���޳���,��ʿ��,lichao@asee.buaa.edu.cn.
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�, ���˻�.���ڻ����Ӿ��ĸ߾��ȶ���ʩ��λ�˲���ϵͳ[J]  �������պ����ѧѧ��, 2007,V33(03): 322-326
Li Chao, Li Yunhua.High-accuracy measuring system for position and attitude in pushing-bridge construction based on machine vision[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(03): 322-326
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2007/V33/I03/322
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