High-precision position measurement device and method based on prior data correction

Abstract

The invention provides a high-precision position measurement device and method based on prior data correction, and belongs to the field of position measurement of moving objects. According to the high-precision position measurement device based on prior data correction, a camera is fixedly connected with a support cross beam; the support cross beam drives the camera to move in the vertical direction along a longitudinal guide track; a movement platform is placed under the camera; a moving object is placed on the movement platform; the camera is connected with an image acquiring card through afirst connecting port; and the image acquiring card is connected with an upper computer through a second connecting port. According to the high-precision position measurement method based on prior data correction, the camera is corrected by using prior art before measurement, and influence of lens distortion to measurement precision can be relieved effectively. A marker with double mark points isadopted, the depth information of the moving object is arranged in a frame of picture acquired by the camera, the number of the camera or the number of other distance sensors is not required to be added, and the structure of the measurement device is simplified.

Description

technical field [0001] The invention relates to a high-precision position measurement device and method based on prior data correction, belonging to the field of position measurement of moving objects. Background technique [0002] The target pose measurement algorithm based on monocular vision proposed in the paper "Research on Pose Measurement Method and Simulation System Based on Monocular Vision" (Harbin Institute of Technology Master's Degree Thesis, Ma Guosong, 20050301), although the position of the three-dimensional moving object It works well with attitude measurement, but it is too redundant for the position measurement of two-dimensional moving objects, and the running speed of the algorithm is slow, so it is not suitable for applications with high real-time requirements. [0003] The pose measurement method based on contour feature matching proposed in the paper "Design and Implementation of Monocular Flying Target Pose Measurement System" (Master's Thesis of Xid...

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Problems solved by technology

[0002] The target pose measurement algorithm based on monocular vision proposed in the paper "Research on Pose Measurement Method and Simulation System Based on Monocular Vision" (Harbin Institute of Technology Master's Degree Thesis, Ma Guosong, 20050301), although the position of the three-dimensional moving object It works well with attitude measurement, but it is too redundant for the position measurement of two-dimensional moving objects, and the running speed of the algorithm is slow, so it is not suitable for applications with high real-time requirements

[0003] The pose measurement method based on contour feature matching proposed in the paper "Design and Implementation of Monocular Flying Target Pose Measurement System" (Master's Thesis of Xidian University, Wang Yifan, 20151201), although it can complete the flying target under complex environmental conditions extraction and measurement, but the measurement algorithm is too complex, there are many parameters to be calculated, and there is a problem of difficulty in debugging in actual engineering applications

[0004] The monocular vision variable-focus pose measurement method based on projection matrix parameterization and the camera-based Although the camera motion reference conversion method of motion calibration can realize the target pose measurement without calibration and calibration, the parameters such as lens focal length and distortion coefficient used in the measurement process are obtained by online calculation, which is easier than offline calculation. Interferenced by accidental factors during measurement, the robustness of the measurement system is poor

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