The Research And Analysis For The Characteristic Of Piezoelectricity-Crystal

Since the Mile brothers discovered the piezoelectricity in 1880,the equipments of piezoelectricity have already been used in the sonar, ultrasonic, sensor technique and new type motion machine etc. With the development of the Science, the higher level has been requested in the fields of aviation and optical engineering etc. As the core of interfere technology, PZT have been more important than before. Because of minuteness, quickly responding and precision, today the PZT has become the applied very extensively tiny motion machine currently. But because of the characteristic of the material oneself and the technology of the manufacturing , PZT has the shortcoming of nonlinearity.In the measurement of optical, PZT is often used as driving machine to the interference instruments, then the nonlinearity should affect the precision of the measurement. Therefore, the PZT is not the accuracy that line will affect directly to move mutually. For the sake of the improvement PZT nonlinearity, people put forward to the method of various kinds, including the design to press or get an electric shock to the tiny of porcelain and ceramics moves the feedback control electric circuit and makes use of the to sign leaf's transformation to restore to original to interfere with the grain mutually and establish mathematics models adopt to not impressionable calculate way of the line error margin. All the above-mentioned methods can obviously improve the PZT's nonlinearity, but need complicated control electric circuit, more instrument equipments or mathematics calculate way etc.According to the actual conditions of the laboratory, thinking about the simple, convenience and precision, the System of PZT testing Characteristic only need the light electricity locator and collecting card , based on the light of interference principle, the PZT measures the conversion interference and calculates the number of stripes to find out the dissimilarity under the voltage condition. The characteristic curve gain a good accuracy. The experiment data shows that the voltage treadlong for 0.20 v~0.60 v, time partition for 10 ms~ the 80 ms are more ideal. The linearity of the PZT is better under the condition of above mentioned and provide theorization for the PZT accurate application.