基于相差积分法的超声波热量表设计

Design of Ultrasonic Heat Meter Based on Quadrature Integration Method

针对供热系统分户式热量计量要求,设计了一种基于相差积分法的超声波热量表。主要介绍了相差积分法的超声波流量测量原理和实现方法,以及方案中所涉及到的热量计算、温度测量原理等;根据测量要求,设计了以MSP430F437为控制核心的硬件测试电路。由于热量表需用电池供电,为了保证热量表的长期运行,在硬件和软件上都进行了低功耗设计。最后,对整个系统进行了联机调试和测试实验,并对流量测量结果作了简单的误差分析。

A high precision ultrasonic heat meter based on the quadrature integration method was designed,according to the household heat metering program for heating system. This paper mainly focuses on the principle and imple- mentation of the quadrature Integration method ultrasonic flow measurement,as well as the calculation principles of heat and temperature measurement. The hardware test circuit was designed according to the measuring principle,and implemented based on the MSP430F437 control core. The battery-powered heat meters were designed to guarantee which can the long-term operation. Finally,after the on-line debugging and testing experiments on the entire system, this paper analyzed the error of the flow measurement.