基于TDC-GP22高精度低功耗超声波热量表的设计  

The design of ultrasonic heat meter with high precision and low power consumption based on TDC-GP22

作　　者：高正中[1] 谭冲[1] 赵联成 李凯旋[1] 魏宁宁[1] 

机构地区：[1]山东科技大学电气与自动化工程学院,山东青岛266590 [2]山东能源枣庄矿业集团,山东枣庄277000

出　　处：《电子技术应用》2015年第7期61-63,67,共4页Application of Electronic Technique

基　　金：山东省博士后基金(201303068);青岛开发区科技支持计划(2013-1-38);青岛经济技术开发区重点科技发展计划(2013-1-61)

摘　　要：基于新型的高速时间数字转换芯片TDC-GP22,利用时差法测量原理,设计了一款高精度低功耗的超声波热量表。为提高测量精度,采用W反射式超声波热量表基表实现流量的测量;为实现低功耗,采用MSP430系列单片机作为主控芯片,实现对外围电路的控制及数据处理。TDC-GP22的测量单元主要完成超声波传输时间和进、出口温度的测量。在A类环境下对多组热量表的测试结果表明:该热量表准确度高,流量误差能控制在1%以内,静态工作电流≤9μA,性能稳定,具有广阔的应用前景。Based on the new-type high-speed digital converter chip TDC-GP22 and time-difference measurement principle, this paper designs an ultrasonic heat meter with high precision and lower consumption. In order to improve the t accuracy, it adopts a W reflective ultrasonic heat meter base table to achieve the measurement of flow. To achieve low power consumption, MSP430 series serve as the main control chip to control peripheral circuits and process data. The measurement unit of TDC- GP22 mainly complete the measurement of ultrasonic transit time and inlet and outlet temperature. Tests show that the measurement precision error of this calorimeter can be controlled within 1% and its working current is about 9μA in class A environment. It has stable performance and broad prospect of application.

关 键 词：TDC-GP22 超声波热量表 低功耗 高精度 W反射式 

分 类 号：TH702[机械工程—仪器科学与技术]