Apply These 5 Secret Techniques To Improve piezo disc element

    

Piezoelectric ceramic sheets and thin metal sheets are bonded together, and piezoelectric ceramics are used as an excitation source to generate a bending vibration mode, which results in a larger amplitude and a smaller acoustic impedance, which can be matched with the acoustic impedance of air. This article uses piezo ceramics. In the form of a bonded structure of a sheet and a thin metal sheet, the thin metal sheet can also serve as a protective film to protect the piezoelectric ceramic and the electrode from abrasion and bumping. The PZT material piezo disc elementcan be selected from a highly stable 3mm nickel-chromium-titanium alloy.The thinner metal sheet is sound pressure reciprocal transmission rate is greater so the metal sheet to be designed to be very thin, generally around 0. 1 mm.

Through the simulation analysis vibration mode of piezoelectric ceramics, the results show that the increase of piezoelectric ceramic thickness, the maximum amplitude of piezo disc crystal is achieved by the vibration sensor is attenuated, and the attenuation speed gradually decreases. When the thickness of the piezoelectric ceramic is less than 1 mm, a plurality of inflection points occur in the resonant frequency .which is changing tendency of the vibration amplitude of the piezoelectric ceramic. For piezoelectric ceramics with a thickness is greater than 1 mm, as the thickness is increasing, the resonant frequency value with the largest amplitude is nonlinearly attenuated, and the degree of attenuation gradually becomes weaker. The sound field simulation study of the piezo discs for milk analysis is embedded for concrete module shows that as the thickness increases, the maximum sound pressure value of the radiated ultrasonic center point gradually increases. Through the study of excitation acoustic energy, it can be seen that the thickness variation of piezoelectric ceramics affects the existence of non-destructive testing. Choosing the appropriate size of piezoelectric ceramic can improve the utilization rate of ultrasonic waves and achieve better non-destructive testing results.

With the development of science and technology, aerospace, robotics, precision instruments and other fields have made new demands on the performance of piezoelectric pressure transducer. Traditional electromagnetic motors have been unable to meet these special needs due to the limitations of their working principles and structures. For this reason, all countries in the world are making great efforts to research new types of motors. Piezoelectric ultrasonic motors are one of the most dynamic and most successful ones. The ultrasonic motor utilizes the inverse piezoelectric effect and ultrasonic vibration of the piezoelectric ceramics,it transforms the microscopic deformation of the material through resonance amplification and frictional motion, and applies power ultrasonics based on physical, mechanical vibration, electronics, materials, and other disciplines. Technology has the advantages of simple and flexible structure and diverse forms of piezo element sensor. In recent years, it has received great attention from merchants and researchers.