时间数字转换技术在超声波热量表设计中的应用  

Application of Time Digital Conversion Technology in Design of Ultrasonic Calorimeter

作　　者：张秀艳[1] 崔永俊[1] 张彬彬 ZHANG Xiu-yan;CUI Yong-jun;ZHANG Bin-bin(North University of China,National Key Laboratory for Electronic Measurement Technology,Ministerial Key Laboratory for Instrument Science and Dynamic Test,Taiyuan 030051,China)

机构地区：[1]中北大学,电子测试技术重点实验室,仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《仪表技术与传感器》2018年第10期31-34,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61335008)

摘　　要：为了解决小管径、低流速流量条件下热量计量不精确的问题,设计了一种高精度、高分辨率的超声波热量测量系统。采用时间-数字转换芯片TDC-GP2,结合时差法和电容充放电法进行流量和温度测量,系统实现的时间间隔测量精度不超过0. 001 5%×设置值,分辨率能够达到100 ps。In order to solve the problem of inaccurate heat measurement under the condition of small diameter and low flow rate,an ultrasonic heat measurement system with high accuracy and high resolution was designed.The time digital conversion chip TDC-GP2 was used to measure the flow and temperature with the time difference method and the capacitance charge discharge method.The system realized the time interval measuring accuracy not more than 0.001 5%multiply setting value,and the resolution can reach 100 ps.

关 键 词：时间数字转换 热量表 时差法 高精度 高分辨率 

分 类 号：TN911[电子电信—通信与信息系统]