摘要
利用超声波在介质中传播速度随温度变化而变化的特点,设计了一种新型精密温度测量仪,该测量仪兼有低成本与高精度的特点。采用特殊的软件细分算法对采集数据进行处理,给出了实现该设计所需要的硬件电路图和软件算法流程图,并对测量仪的分辨率进行了分析。分析结果显示设计实现了超声波ns级微小时间的测量,使超声波测温技术在实际运用中的关键问题得以解决,从而使测量结果的分辨率优于0.001℃.
Using characteristics that ultrasonic speed varies with temperature in medium,this paper designed a kind of new temperature measurement apparatus.The ultrasonic thermometer possessed both low cost and high precision.It used the special software subdivision algorithm for processing collecting data.The paper introduced the design of the hardware circuit and software flowchart as well as the analysis of accuracy for measuring instrument.The analysis results show that the design can realize the measuring of nanosecond range for small changes of time,it solved the key question of ultrasonic thermometer using in the practical application.Besides,it makes the resolution of measurement result better than 0.001 ℃.
出处
《仪表技术与传感器》
CSCD
北大核心
2011年第6期32-35,共4页
Instrument Technique and Sensor
关键词
超声波温度计
软件细分
精密测量
信号采集
FPGA
ultrasonic thermometer
subdivision algorithm
precision measurement
data capture
FPGA
