超声波液体测温的TDC方法研究
Study on TDC Method of Ultrasonic Liquid Temperature Measurement
张兴红 1李奕锐 1任丽汾 1曾凡峰1
作者信息
- 1. 重庆理工大学两江国际学院,重庆 401135
- 折叠
摘要
超声波测温采用超声波传播时间作为测量信息,时间测量的误差对测温系统性能有显著影响.针对上述问题,设计了基于时间数字转换器(TDC)方法的超声波水温测量系统.根据传播时间和温度的关系,系统利用FPGA和高精度时间测量芯片TDC-GP22的硬件电路,结合软件程序算法有效降低时间测量误差的影响,并通过合理设计驱动电路和信号处理电路,使得超声波传播时间测量的分辨率能够达到1.0×10-10s,进而系统能够实现温度测量的分辨率达到0.001℃.通过实验证明,该系统具有分辨率高、可重复性高等优点.
Abstract
Ultrasonic temperature measurement uses ultrasonic propagation time as measurement information,and the error of time measurement has a significant impact on the performance of temperature measurement system.To solve the above problems,an ultrasonic water temperature measurement system based on time to digital converter(TDC)is designed.According to the rela-tionship between propagation time and temperature,the system uses FPGA and hardware circuit of TDC-GP22,which is a high precision time measurement chip,combined with software program algorithm to effectively reduce the influence of time measure-ment error.Through reasonable design of driving circuit and signal processing circuit,the resolution of ultrasonic propagation time measurement can reach 1.0×10-10s,The resolution of temperature measurement can reach 0.001℃ .Experiments show that the system has the advantages of high resolution and high repeatability.
关键词
超声波测温/TDC-GP22/时间测量/高分辨率Key words
Ultrasonic Temperature Measurement/TDC-GP22/Time Measurement/High Resolution引用本文复制引用
基金项目
重庆市创新创业训练计划基金资助项目(2020CX052)
出版年
2024
NETL
NSTL
万方数据