Piezoelectric ultrasonic transducer parameter measuring device and method

Abstract

The invention relates to the technical field of piezoelectric ultrasonic transducer parameter measurement equipment, in particular to a piezoelectric ultrasonic transducer parameter measurement device and method. The output end of a low-ripple direct-current stabilized power supply is electrically connected with the input end of an LCD display screen and touch screen module circuit, the input end of a CPU, the input end of a DDS direct digital frequency synthesizer, the input end of a constant-current power amplification circuit, the input end of an analog switch circuit, the input end of a numerical control low-pass filter, the input end of a numerical control gain amplification circuit and the input end of a high-pass ADC circuit. The CPU is electrically connected with the LCD display screen and the touch screen module circuit through a bus. The device is reasonable in design, convenient to operate and small in overall machine body and has the advantages of being high in signal precision and calculation speed, the solved parameters of the electric ultrasonic transducer are more accurate and visual, small-step frequency sweep is adopted, admittance circle data are obtained through constrained least square fitting, the calculated parameter error of the piezoelectric ultrasonic transducer is smaller and more accurate, the frequency sweeping speed is higher, and the required measurement time is shorter.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ultrasonic transducer parameter measurement equipment, in particular to a piezoelectric ultrasonic transducer parameter measurement device and method. Background technique [0002] At present, with the application of ultrasound in medical treatment, industrial processing and other industries is becoming more and more popular, it is necessary to measure the parameters of various types of piezoelectric ultrasonic transducers. Inaccurate measurement of piezoelectric ultrasonic transducer parameters will cause matching mismatch, which will lead to many problems such as low conversion efficiency, waste of electric energy, heating of the transducer, and shortening the life of the transducer. The parameters of piezoelectric ultrasonic transducers need to be convenient and intuitive in the process of actual maintenance, maintenance, and production, but the existing measuring equipment is general-pur...

AI Technical Summary

Problems solved by technology

Inaccurate measurement of piezoelectric ultrasonic transducer parameters will cause matching mismatch, which will lead to many problems such as low conversion efficiency, waste of electric energy, heating of the transducer, and shortening the life of the transducer.

The parameters of piezoelectric ultrasonic transducers need to be convenient and intuitive in the process of actual maintenance, maintenance, and production, but the existing measuring equipment is general-purpose measuring equipment and cannot perform special measurement of parameters in the field of specific piezoelectric ultrasonic transducers , so there is an urgent need for a convenient, accurate, intuitive and portable measuring device for parameter measurement

[0003] Traditional measurement methods include four-arm bridge method, voltammetry, resonance method and reflection method. Among them, the four-arm bridge method is inconvenient to adjust the balance of the bridge and can only be used for low and medium frequencies; the voltammetry method has a large error

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