Design of an Ultrasonic Gas Flow Measurement Circuit Based on the Time-Difference Method

To address the defects in the performance of conventional mechanical gas flow meters, this study designed an ultrasonic gas flow measurement circuit by the time-difference method and by relying on the superior performance of the domestic high-precision digital-time converter chip MS1030, and gave detailed introduction to such modules as the time measurement module, the driver amplifier module, the channel switch module, the receiver signal conditioning module, the wave shaping module of the circuit and the implementation software. The performance of the circuit was verified by tests on the standard gas flow measurement device of the critical flow nozzle, and the test results showed that the designed ultrasonic gas flow measurement circuit achieved high accuracy, high reliability and reached the 2.0 level of accuracy in the industry standard.