Abstract The quality factor of the resonant sensor is an important parameter that affects the performance of the sensor.In order to improve the performance of the resonant tube liquid density sensor and analyze the quality factor of the resonant tube sensor, this paper starts from the mathematical model of the resonant tube sensor, solves the kinematic equation during the vibration process of the resonant tube, and obtains an analytical formula for the quality factor of the resonant tube. On this basis, a method for improving the quality factor of sensors is proposed, which is to design a sensor with a double tube symmetrical structure or to maintain stable resonant tube boundaries when increasing the base mass. The effectiveness of these two methods was further verified through different comparative experiments. The calibration of the sensor using a new symmetrical structure showed that the absolute error of the sensor measurement was within 1.0kg/m3.
Received: 29 December 2023
Published: 19 March 2025
2025, Vol. 46 
