Abstract
In this paper, a strain sensing system using piezoelectric ceramics is developed to monitor the feature of strain history of structural member. The system is a rectangular box made of thin aluminum plate, in which piezoelectric element, electric circuit including charge amplifier, signal processing unit, and battery are facilitated. The device is bonded onto the structural member by using adhesive agent, and counts the number of cycles of dynamic strain by Rain flow method. In order to see the performance of the system, experiments are carried out using a fatigue testing machine. As the result, it is clarified that proposed strain sensing device can measure the dynamic strain of structural member.
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