精密高温高压超声波温度计设计

Design of High-temperature and High-pressure Ultrasonic Thermometer

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.