Development of self-sustaining circular sheet piezoelectric generator and measurement research

To solve generator problem of the sensor nodes for floating bridge monitoring system, design a kind of self-sustaining circular sheet piezoelectric generator. Its most important feature is the use of a self-sustaining circular sheet piezoelectric structure, it converts the mechanical energy into vibration excitation source, so as to extend the load´s continuous effect and correspondingly extend the generator time; Describe its operating principles, the output electricity energy increases when piezoelectric circular sheet becomes resonance. In order to test and analyze the electrical generation performance of self-sustaining piezoelectric generator, built the measuring platform based on vibration exciter to simulate vibration test, in the design of this measuring platform, displacement sensor is used to measure the amplitude of piezoelectric circular sheet, charge amplifier is used to measure the electricity quantity generated by piezoelectric circular sheet, and the test result shows that increase the exciter load and work under the natural working frequency of piezoelectric circular sheet will increase the generating capacity of self-sustaining circular sheet piezoelectric generator.