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| The Length Dimension Measurement for Large Hot Forgings Based on the Recognition of Green Laser |
| WANG Ying,ZHANG Yu-cun |
| Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract A length dimension measurement system for large hot forgings is designed. The images of each moment in the process of green laser scanning forgings are analyzed in this system. The dimension of the forging is measured according to the edge informations of forgings. First of all, the CCD camera and the green laser are driven by the motor, the real-time images of forgings and the positional information of laser line is acquired. Then whether the laser line locates on the edge of forgings is judged by image recognition. Secondly, the length dimension of forgings is obtained from recording the position information of both sides of the forging edges. The experimental results show that the maximum measurement error is less than 2 mm. So the method proposed can meet the needs of forging dimension measurement.
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Received: 02 March 2017
Published: 12 April 2018
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2018, Vol. 39 
