precision ultrasonic gas flowmeter

 

 

MA Chao, ZHANG Jian yi, YUAN Yan hong

 

（Modern Textile Equipment and Technology Engineering Research Center of Ministry of 

Education, Zhejiang Sci Tech University, Hangzhou 310018, China）

 

 

Abstract: Aiming at solving low precision and high power consumption of the traditional gas flowmeters, flow measurement principle, driving transducers by low voltage,signal receiving and transmitting , power consumption were researched , and the novel ultrasonic gas flowmeter based on ultra low power singlechip EFM32 and high precision chip TDC GP22 was proposed . The novel ultrasonic gas flowmeter was tested by flow calibrating test rig. The results indicate that the novel ultrasonic gas flowmeter can real timely acquire gas flow, gas concentration, pressure and temperature. The flowmeter is promising to be applied by its high precision and ultra low power consumption.

 

Key words: ultrasonic flowmeter; EFM32; TDC GP22; time difference method; ultra low power