Abstract
In this paper, an automatic sensing system measuring contact pressure distributions is proposed. The sensing material is made of piezoelectric ceramics. To measure electric charge in the material produced by contact pressures, a special electric circuit is designed by using a peak hold circuit. A micro computer (NEC PC-9801) and a multiplexer controller are used to automatically measure the contact pressure distributions. By using the ceramic sensor for 5×5 measuring points, the pressure distributions for several contact problems are measured. The obtained total forces and the pressure distributions are compared with the corresponding acting forces and the theoretical values, From the results, it is recognized that the proposed sensing system is excellent in reliability and durability.
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