Design and implementation of gas ultrasonic flowmeter system based on max35104

Abstract

In the production, supply, storage and marketing of natural gas industry, gas measurement is a key link. Aiming at solving the problems in the current ultrasonic gas flowmeter, such as high-power consumption, low measurement accuracy and difficult data transmission, an ultrasonic gas flowmeter based on MAX35104 is designed and implemented. The system takes STM32F103 microcontroller as the control core, adopts the time difference method and uses highprecision timing chip, MAX35104, FUS-200A ultrasonic transducers and PT1000 temperature sensor to acquire instantaneous flowrate and temperature. It also connects LCD through FSMC ports as display module to realize local visualization interface generation, and realizes the function of remote monitoring on cloud server through the EC20, a 4G module, based on LTE communication protocol. In addition, the system has the function of real-time early warning, which is realized by preset threshold as well as the function of errors online diagnosis by analyzing the special state of hardware, which can diagnose the probe connection error, whether the chip working abnormally and the cloud server transmits correctly. With the continuous improvement of the measurement accuracy of the system, it is bound to play a positive role in the development of the natural gas industry.