低功耗超声波热量表的设计与实现  

Design and Implementation of Low Power Ultrasonic Heat Meters

作　　者：郭银景[1] 任现勇[1] 郭登岭 刘志文[1] 

机构地区：[1]山东科技大学信息与电气工程学院,青岛266590 [2]中国石油冀东油田公司南堡油田公司,唐山063200

出　　处：《自动化与仪表》2012年第10期8-12,共5页Automation & Instrumentation

基　　金：国家自然科学基金项目(61071087);山东省自然科学基金项目(ZR2011FM018);青岛市应用基础研究项目(11-2-4-4-(9)-jch)

摘　　要：该文设计了一种低功耗高精度的超声波热量表。热量表采用MSP430作为MCU,使用时间测量芯片TDC-GP21来测量超声波前向和后向传播时间,利用热敏电阻PT1000测量进水口和出水口处温度。文中从硬件设计入手,探讨了热量表的组成原理,并基于该硬件设计了热量计算软件。实际测试结果表明,该热量表具有较高的计量精度和良好的稳定性。The paper presents a design of low power high precision ultrasonic heat meters. The MSP430 was used as MCU of the heat meter,the time measurement chip TDC-GP21 ,a Time-to- Digital converter,was used to measure the ultrasonic upstream propagation time and downstream propagation time,the PT1000,a platinum thermistor,was used to measure the water temperature at inlet and outlet.It starts with hardware design after investigating the principle of ultrasonic heat meters, and completes software programming based on the hardware design. Moreover ,the accuracy and stability of the ultrasonic heat meters in paper can be verified by the actual test results.

关 键 词：超声波热量表 MSP430 TDC—GP21 低功耗 

分 类 号：TH702[机械工程—仪器科学与技术]