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| Measurement of the template curve of plough body based on stereo vision and structured light |
| XING Zuochang, TIAN Subo, LIU Siyao, LIN Jing, ZHANG Zuli |
| College of Engineering, Shenyang Agricultural University, Shenyang, Liaoning 110866, China |
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Abstract With plough shin as the experimental object, using structured light and binocular stereo vision, under laboratory conditions, the 3D reconstruction and measurement system of hot plough body′s template curves is built, and the extraction algorithm of non-Gaussian distribution laser stripe′s sub-pixel center and edge detection methods of morphology is proposed. Based on the 3D correction of original image, the second correction and high-precision matching algorithm are studied, and the accuracy and speed of stereo matching and 3D reconstruction are improved. On Halcon platform, the center extraction, reconstruction, fitting and mathematical description of the plough body′s template curves of structured light are realized, the difficult problem of measurement of the template curves of plough body, especially of hot forging plough body is solved. It provides a new way for the inspection, mapping, description, manufacturing and design of the plough body. Running on the Intel(R)Core(TM)i7-5500U CPU@2.40 GHz processor, the measurement accuracy is 1.88 mm, and time consuming is 316 ms. The experimentald results show that the structured light and binocular stereo vision can be used to measure the template curve of the plough body, and the influence of hot forging radiation light and other interference effects are avoided. It has a certain accuracy and feasibility, and can improve the efficiency of the design, manufacture and test of the plough body.
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Received: 20 September 2015
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