Size measurement based on a two-camera machine vision system for the bayonets of automobile brake pads

作者：Xiang, Rong^*; He, Wenhui; Zhang, Xinna; Wang, Dong; Shan, Yuekang

来源：Measurement, 2018, 122: 106-116.

DOI：10.1016/j.measurement.2018.03.017

• Brake pad
• Size
• Machine vision
• Measurement
• Calibration

This paper presents a measurement method based on a two-camera machine vision system and a relative measurement principle to realize the high-accuracy measurement of bayonet sizes of large automobile brake pads. This method used two cameras to capture the local images around the left and right standard edges of a specially designed standard and around the left-and right-detected edges of the measured bayonet. Then, the rectangle regions of the detected edges were set automatically. The measurement equation corresponding to the detected edges was derived after edge detection and linear fitting on the basis of the relative measurement principle. Finally, the bayonet sizes were determined using the measurement equation. Test results showed that repeatability was +/- 0.019 mm, the average of biases was 0.003mm and average measurement time was 0.396 s per brake pad, all of which satisfied the requirements of online measurement.

• 出版日期2018-7
• 单位中国计量大学