Study On The Technology Of Piezoelectric Electro-Pneumatic Transducer

The electron-pneumatic invertor is the main accessory of the pneumatic actuator and is the indispensable key equipment in the automatic industrial production. It's used to achieve the information conversion and the energy conversion in the automatic control instruments and systems. With the development of the micro-electronic technology, the control theory and the computer technology, the electron-pneumatic invertor is tending to the electronic or intelligent production . At the same time, the higher requirement is advanced to electron-pneumatic invertor device.Piezo-bimorph actuators of double-sided and single-sided,the formulas on displacement model are derived by forcing analysis. The results of experiments proved exactitudes of the formulas .Furthermore, influnce of elastic beams thickness and material characters are discussed by numerical simulation on computer. It provides the basis of theory to choose piezoelectric bimorphs on structure design of bimorphs.Base on the successful researching of the EPI device and analyzing the theory of piezoelectric actuator, the paper designed a new electron-pneumatic invertor with piezoelectric actuator. Furthermore, study on the static character theory and experiment and establish a high efficient control system. The primary advantages of the piezoelectric inverting instrument are simple structure, low cost, stable performance, fast response and the fewer request of the technology,it provides the solid basis to prepare the new invertor of intelligence, digit, information and adapt the industrial field bus technology.The static test and dynamic running of the systems proves that the designing methods are rational,the performances are reliable,and the anticipated objective has been achieved.