反射式超声波温度计设计  

Design of Reflective 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9期16-18,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(cstc2012jjA70004);(cstc2012jjA40062)

摘　　要：基于超声波在介质中的传播速度受温度的影响的原理,设计出一种用超声波技术精密测量温度的温度计。根据超声波的反射特性,将传感器设计成反射式结构可以有效减小超声波温度计的尺寸。利用基于FPGA的硬件电路和特殊的软件细分算法,可以实现高分辨率的超声波传播时间测量。这种新型的反射式超声波温度计可以实现测量分辨率优于0.001℃的精密温度测量,并保证很好的实时性,可广泛的用于常温和高温的精密温度测量。According to the characteristic of ultrasonic velocity influenced by the temperature in medium, a kind of precise temperature measurement thermometer based on the ultrasound technology was designed. , using a reflective structure to reduce the size of the ultrasonic temperature sensor. The hardware circuit based on FPGA and the special software subdivision algorithm were used to guarantee the high precision of the ultrasonic propagation time measurement. The ultrasonic thermometer can realize preci- sion temperature measurement with a resolution better than 0.001 ℃, and ensure a good real - time performance. It can be widely used in precision temperature measurement at room temperature and high temperature.

关 键 词：超声波换能器 软件细分 精密测量 超声波驱动电路 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]