Abstract：Temperature will affect the performance of the transducer of the gas ultrasonic flowmeter, and then affect the consistency of the transducer. Therefore, it is of great significance to study the performance change of the transducer under variable temperature conditions. By measuring the impedance characteristics of the transducer, the electroacoustic parameters of the transducer are calculated. The results show that the resonant frequency is inversely proportional to the temperature, and the change rate is -0.11KHz/℃; The static capacitance is proportional to the temperature, and the change rate is 0.015nF/℃; The farther away from the resonant frequency, the smaller the output amplitude of the transducer, and the stronger the transient process oscillation. The results show that the performance of the gas ultrasonic transducer will change with the change of temperature, and the transmitting and receiving waveforms of the transducer will change with the change of the excitation signal, which will affect the matching characteristics of the transducer of the ultrasonic flowmeter.
2023, Vol. 33 