In this paper, research on measurement methods of hole during the parts online detection has been made. Both diameter and position of the hole are going to be detected in the same measurement system. In order to obtain higher accuracy and efficiency, a comparative analysis test of using the contact probes, the inductive sensor, the laser sensor, the forward and back lighting CCD imaging have been achieved. Results show that the contact measurement using inductive sensor is more suitable for the system, for the reason that it has higher reliability and efficiency.
In this article, a method of data fusion based on contour of parts is proposed for multi-factors measurement. Contour of the parts is used as a reference to fusing data because it is more sensitive to the angular changes than other parts and the relative positions between the contour and other individual part are fixed. This method not only is a reference to fuse data from multi-sensors, but also could apply feedback control for the measurement system. A key part of automotive transmission named splined hub has been used in the verification experiment in which the principle and structure of the measurement system is introduced.
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