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Piezoelectric ceramic transformers have been widely studied and applied since CA.Rosen proposed a piezoelectric ceramic transformer, piezoelectric power generation is operating a length-extended vibration mode. However, the output impedance of such transformers is high, In order to overcome this shortcoming, the Japanese scholars made a new type of laminated piezoelectric ceramic step-down transformer by using the secondary thickness expansion vibration mode of piezoelectric ceramics, and its work frequency is up to 2 MHz and output power is up to 4 W piezoelectric pressure transmitter . The input section has only one layer of piezoelectric ceramic with high internal resistance and polarization along the thickness; , The various layers in the electrical relationship is parallel, so you can get a lower impedance. The output part and the input part of the isolation between the insulating layer,The lower surface of the fixed laye piezo ceramic fabrication is very low surface layer.The buck ratio by the output part of the thickness is the single layer of the decision.This laminate reduces the  high energy density of transformer, piezo sensor arduino is high frequency and no electromagnetic radiation, Copper consumption is small, which can be widely used.Limited piezoelectric ceramic has microdisplacement . piezo ceramic crystal piezoelectric effect of piezoelectric ceramic designed piezoelectric microdisplacement that is a collection of electronic components and structural components in one solid state. The device has the advantages of fast response, high precision, large output torque, power consumption, low temperature sintered piezoelectric ceramic is materials and application of 51 low, without the need for transmission and other advantages, frequency piezoceramic transducer has been used in precision machinery, nano machining, automatic control, robots and other high-tech fields For the piezoelectric microdisplacer, the material is fixed, the higher the operating voltage, the greater the degree of nonlinearity of the displacement with the voltage change.To reduce the operating voltage, increasing the displacement, the laminated structure can be used.