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| Detection method and analysis of trajectory of horizontal pulled gate head based on point laser |
| 1.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; 2.Mangdao Ship Lock Management Office of Jiangsu Province, Yangzhou, Jiangsu 225026, China |
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Abstract To analyze the trajectory change of the gate head caused by the running wear of trolley at the bottom of horizontal pulled gate, a method for detecting the trajectory of gate head of the horizontal pulled gate was proposed based on the point laser. The laser spot area in the preprocessed image was segmented by threshold segmentation and hole filling method. The Canny edge detection and sub-pixel edge extraction algorithm based on Zernike moment were used to calculate the sub-pixel edge of spot area, and the spot center coordinate was obtained by calculating the spot centroid. The mean value of the data in the same time interval was calculated, and the trend of the trajectory was analyzed by linear regression analysis. The results show that the proposed method can truthfully obtain and record the track coordinate data of the horizontal pulled gate head, and the linear regression model of the gate head trajectory can be calculated to analyze the wear condition and wear law of the key components of the bottom trolley for the horizontal pulled gate.
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