Investigation of generating actuation sensor applying the first direct and the secondary converse piezoelectric effect

The theory of the first direct piezoelectric effect and the secondary converse piezoelectric effect is analyzed and confirmed by experiments.There is good linear relationship between electric displacement generated by the first piezoelectric effect and strain and stress generated by the secondary converse piezoelectric effect and outside force.Because the first direct piezoelectric and the secondary converse piezoelectric effect are bilateral effect existing in the single crystal,it is especially suitable for the investigation of the integration of sensor and actuator.The proposal and realization of the structure of the generating actuation sensor are put forward through the principle that regards the first direct piezoelectric effect of crystal as sensor because of its measuring force and the secondary converse piezoelectric effect as actuator because of its output micro-displacement,and the feasibility is proved through the experiments.