一种用于时差法超声波热能表的高精度测时方法

摘要

介绍了时差法超声波热能表检测流量原理,阐述了由德国ACAM公司的高精度时间测量芯片TDC-GP2和16位超低功耗单片机MSP430F413组成的高精度测量电路的硬件及软件设计.详细分析了高精度测量技术与高精度测量原理,最后提出了一种提高时差法测量精度的方法--Ⅱ型管技术.%The detection principle of the time difference ultrasonic calorimeter was introduced, including the design of hardware and software of high-precision measurement circuit constituted by TDC-GP2 chip and 16-bit MSP430F413 MCU, and then the Π-tube technology of improving the measurement precision was given.