Dr. Maosheng Hou Profile

Dr. Maosheng Hou

at Beijing Institute of Technology

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Publications (4)

Proceedings Article | 10 May 2019 Paper

Research on strain field monitoring system of irregular surface workpiece

Zhichao Liu, Maosheng Hou, Xuezhu Lin, Tao Liu, Lili Guo, Lijuan Li

Proceedings Volume 11068, 1106803 (2019) https://doi.org/10.1117/12.2522652

KEYWORDS: Fiber Bragg gratings, Fiber couplers, Sensors, Error analysis, Assembly tolerances, Standards development, Demodulation, Optical testing, 3D metrology, Data conversion

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Proceedings Article | 24 October 2017 Paper

Research on calibration algorithm in laser scanning projection system

Song Qu, Li Juan Li, Mao Sheng Hou

Proceedings Volume 10458, 1045805 (2017) https://doi.org/10.1117/12.2281231

KEYWORDS: Laser scanners, Calibration, Projection systems

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Laser scanning projection technology can project the image defined by the existing CAD digital model to the working surface, in the form of a laser harness profile. This projection is in accordance with the ratio of 1: 1. Through the laser harness contours with high positioning quality, the technical staff can carry out the operation with high precision. In a typical process of the projection, in order to determine the relative positional relationship between the laser projection instrument and the target, it is necessary to place several fixed reference points on the projection target and perform the calibration of projection. This position relationship is the transformation from projection coordinate system to the global coordinate system. The entire projection work is divided into two steps: the first step, the calculation of the projector six position parameters is performed, that is, the projector calibration. In the second step, the deflection angle is calculated by the known projector position parameter and the known coordinate points, and then the actual model is projected. Typically, the calibration requires the establishment of six reference points to reduce the possibility of divergence of the nonlinear equations, but the whole solution is very complex and the solution may still diverge. In this paper, the distance is detected combined with the calculation so that the position parameters of the projector can be solved by using the coordinate values of three reference points and the distance of at least one reference point to the projector. The addition of the distance measurement increases the stability of the solution of the nonlinear system and avoids the problem of divergence of the solution caused by the reference point which is directly under the projector. Through the actual analysis and calculation, the Taylor expansion method combined with the least squares method is used to obtain the solution of the system. Finally, the simulation experiment is carried out by MATLAB, and the precision of the calibration algorithm is analyzed.

Proceedings Article | 6 March 2015 Paper

Image inpainting for the differential confocal microscope

Weiqian Zhao, Lirong Qiu, Lei Wang, Dali Liu, Maosheng Hou

Proceedings Volume 9446, 94463D (2015) https://doi.org/10.1117/12.2181352

KEYWORDS: Confocal microscopy, Microscopes, Image restoration, Signal detection, Image quality, Optical simulations, Statistical modeling, Computer simulations, Sensors, Laser damage threshold

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Proceedings Article | 6 March 2015 Paper

Development of ultra-precision centering and leveling turntable using aerostatic bearing technology

Maosheng Hou, Yanrong Tian, Lin Ji, Longxiao Wang, Jiaqi Liu, Weiqian Zhao

Proceedings Volume 9446, 94463A (2015) https://doi.org/10.1117/12.2181345

KEYWORDS: Actuators, Spherical lenses, Precision measurement, Mathematical modeling, Optical testing, Precision optics, Error analysis, Reflectors, Autocollimators, Control systems

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