精密高温高压超声波温度计设计  

Design of High-temperature and High-pressure Ultrasonic Thermometer

作　　者：张兴红[1] 邱磊[1] 何涛[1] 王先全[1] 张天恒[1] 

机构地区：[1]重庆理工大学时栅传感及先进检测技术重庆市重点实验室,重庆400054

出　　处：《仪表技术与传感器》2014年第11期24-26,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(51275551);重庆市自然科学基金资助项目(cstc2012jj A70004;cstc2012jj A40062)

摘　　要：针对一些特殊场合中对温度测量的需要,根据超声波在气体介质中的传播速度与气体介质温度的关系,设计出一种新型的精密的超声波温度计。将超声波温度传感器设计成球形结构,使得该温度计可以用于高温高压环境下的温度测量。采用基于FPGA的高精度测量电路和软件细分算法,可以实现高分辨率的超声波传播时间的测量,进而保证了该温度计能够实现分辨率优于0.001℃的高精度温度测量,并具有很好的实时性。该温度计可广泛地应用于高温高压环境下精密温度测量和控制等领域。In consideration of the needs of temperature measurement in some special occasions, on the basis of the relationship between the velocity of ultrasonic wave and the temperature of the gas medium, a new kind of precise temperature thermometer was designed. The thermometer with the spherical structure can be used for the temperature measurement under the high-temperature and high-pressure environment. The use of high resolution measurement circuit and arithmetic can achieve high resolution measurement of the transmission time of ultrasonic wave and ensure the resolution of temperature measurement is better than 0.001℃. This ultrasonic thermometer can be widely used in the fields of precise temperature measurement and control under the high temperature and high pressure environment.

关 键 词：超声波换能器 软件细分算法 超声波驱动信号 回波信号处理电路 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]