Instrumentation, Techniques, and Measurement

Nondiffracting beam based technology for an attitude measurement system for automatic orientation of shield

[+] Author Affiliations
Guolu Ma, Lixian Liu

Southwest University of Science and Technology, School of Manufacturing Science and Engineering, No. 59, Middle Segment of Qinglong Avenue, Pucheng District, Mianyang City, Sichuan Province 621010, China

Bin Zhao

Huazhong University of Science and Technology, School of Mechanical Engineering, Department of Instrumentation, Wuhan, Hubei 430074, China

Opt. Eng. 54(11), 114106 (Nov 25, 2015). doi:10.1117/1.OE.54.11.114106
History: Received September 11, 2015; Accepted November 3, 2015
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Abstract.  An electronic target technology based on a nondiffracting beam for spatial attitude determination is proposed. Automatic orientation of shield tunnel equipment is achieved by a spatial-coordinates measurement system consisting of an electronic target and a total station. During the measurement, a ranging laser beam is sent from the total station. It is transformed into a nondiffracting beam by an axicon, and the beam spot images are captured by a charged-coupled device image sensor. Since the center of the nondiffracting beam has a one-to-one mapping to the incident direction of the laser, the spatial orientation of the laser beam can be obtained via center fitting of the nondiffracting images. When this system is combined with a two-dimensional electronic inclinometer, the attitude parameters can be determined from the relationship of different spatial angles. Experimental results demonstrate that the attitude measurement system has a precision of ±0.5mrad. Further, the engineering applications also show that the system has high operational quality and environmental adaptability.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Guolu Ma ; Lixian Liu and Bin Zhao
"Nondiffracting beam based technology for an attitude measurement system for automatic orientation of shield", Opt. Eng. 54(11), 114106 (Nov 25, 2015). ; http://dx.doi.org/10.1117/1.OE.54.11.114106


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