The Research of Ultrasonic Heat Meter Based on Wireless Backwater Temperature Measurement

摘要

According to the disadvantages of traditional heat meter and normal ultrasonic heat meter, an ultrasonic heat meter based on wireless backwater temperature measurement was designed. The unit of wireless backwater temperature measurement and the unit of flow and influent temperature measurement which are mutually independent transmit data to each other with wireless communication module. A approximate Σ-Δ A/D scheme based on MSP430F123 micro controller unit on the basis of the principle of Σ-Δ A/D also was proposed in paper. Experiment results demonstrated that measurement error is low when we measure temperature with the method proposed and it can satisfy the required accuracy of temperature measurement while reducing cost.