基于超声波技术的温度传感器设计  

Design of Temperature Sensor Base on Ultrasonic Technology

作　　者：张天恒[1] 凌旭[2] 张兴红[1] 

机构地区：[1]重庆理工大学机械检测技术与装备教育部工程研究中心,时栅传感及先进检测技术重庆市重点实验室重庆400054 [2]湖南天雁机械有限责任公司,湖南衡阳421005

出　　处：《仪表技术与传感器》2014年第8期10-13,共4页Instrument Technique and Sensor

基　　金：重庆市自然科学基金项目(cstc2012jjA70004)

摘　　要：超声波检测技术的运用,使温度测量具有速度快、准确及测量范围大等优点。利用超声波在介质中的传播速度随温度变化而变化的特性,以带有NIOS软核的FPGA作为硬件电路控制核心,实现高速实时的数据采集,同时采用软件细分插补算法,实现超声波传播时间的精确测量。经过理论推导和实验,设计的超声波温度传感器能够实现高精度高分辨率的温度测量,传播时间达到ns级,分辨率优于0.001℃.The use of ultrasonic testing technology can make the temperature measurement fast, accurate, with a wide measuring range, and etc. Through the use of ultrasonic wave propagation velocity in the medium with the temperature changes in features,with NIOS soft core of FPGA as the hardware circuit control core to achieve high-speed real-time data acquisition, software subdivision interpolation algorithm was adopted to realize the precise measurement of the ultrasonic propagation time. Through theoretical derivation and experimental verification,the design of ultrasonic temperature sensor can realize high precision, high resolution temperature measurements, propagation time reach nanosecond, and its resolution is better than that of 0. 001℃.

关 键 词：温度传感器 FPGA NIOS软核处理器 细分插补算法 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]