FLEXIBLE PIEZOELECTRIC ELEMENT

摘要

PROBLEM TO BE SOLVED: To solve such a problem of a conventional flexible piezoelectric element that the temperature around the piezoelectric element has to be controlled by using a separately provided temperature sensor. SOLUTION: This flexible piezoelectric element is equipped with a flat plate shaped composite piezoelectric body 3 made by mixing piezoelectric ceramic powder 2 in a high polymer base material 1, flexible electrodes 4 and 5 disposed on both sides of the piezoelectric body 3 and each comprising a composite conductive body made up of a polymer for electrode and conductive particles, a vibration voltage detection means 6 for the piezoelectric body 3, a capacitance detection means 7 based on the capacitance-temperature characteristic of the electrodes 4 and 5, and a temperature convertion means 8. The flexible piezoelectric element for simultaneously detecting pressure and temperature by a simple structure can be thus provided.