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The existing linear structured light sensor system calibration process to the equipment requirement is high, the calibration process such complicated problems, this paper puts forward a simple calibration method. Use of the most commonly used transit system, back light reflection artificial materials, as well as the independent development of photography calibration software, in a plane wall master three fine line, at the same time in space layout a filament, and the four o 'clock in the transit system of coordinates. Combined with camera coordinate system in the transit system of bearing, the light plane and unified camera, so as to get the light plane point in the camera coordinate system coordinates. Structured light system can be moved several position, get more sets of light plane, thus to find the mean value. The experimental data show that field calibration. Introduction Line structured light active sensing technology with low cost, volume small, non-contact, fast speed, convenient and flexible and light stripe image information easy extraction, etc. advantage, have important significance and broad application prospects in visual measurement, industrial inspection [1]. The basic principle is that the structure light stripe is modulated by the height of the measured object, camera by acquiring the deformation stripe image information, according to the relative position relationship between the camera and the laser to solve the 3D information of the object surface [2]. Therefore, the calibration of line structured light sensing system is one of the key links in the whole test task. At present, a lot of calibration methods are proposed according to the measurement model of the line structured light sensing system. The main methods have drawing calibration method [3], the calibration method of based on three-dimensional targets and cross ratio invariability [4, 5] and tooth shape target method [6, 7], these three kinds of calibration methods all need the precision calibration auxiliary equipment, the calibration process is tedious, and is not suitable for the spot calibration. In order to quickly and easily find out the structure light sensor model, this paper presents a calibration method based on the combination of the theodolite and the existing software. This method is simple in operation and can be implemented in a simple environment. Structural Light Measurement Principle Line structured light detection system consists of laser, camera and the point of view of the scanning equipment general, laser projects a light plane to the measured object surface, modulated by depth variation of the measured object surface, a deformation of the structured light stripe is formed, by the camera gets stripe of 2D image. The relationship between image points of camera image plane and object points of the laser light plane to meet the camera coordinate system of the collinear equation: International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2016) © 2016. The authors Published by Atlantis Press 377

Research on the Method to Calibrate Structure Parameters of Line Structured Light Vision Sensor