传感技术学报2016，Vol.29Issue(2)：177-181,5.DOI:10.3969/j.issn.1004-1699.2016.02.005
高精度分体式多通道超声波温度计的设计
The Design of High Precision Split Type and Multi-Channel Ultrasonic Thermometer
摘要
Abstract
The traditional temperature sensor can’t meet the requirements of measurement under harsh and particu⁃lar conditions,the split type and multi-channel ultrasonic thermometer is designed. Several couples of measuring heads are set in each lateral position of the containers of measured medium. The starting point of ultrasonic wave propagation is accurately determined by control signal of FPGA. According to the combination of characteristic wave search algorithm through blocking search,the high-speed and high-resolution signal sampling circuit and lin⁃ear interpolation algorithm,utilizing the both sides of sampling point which close to zero point to complete the accu⁃rate detection of end time of ultrasonic wave propagation,and then precisely compute the ultrasonic transmission time. When propagation distance is definite,a simulated experiment with water as medium is accomplished,Result shows that the split type and multi-channel ultrasonic thermometer can process ns level measurement of the resolu⁃tion of the ultrasonic transmission time,which ensuring high precision of temperature measurement.关键词
分体式/超声波/特征波/直线插补算法Key words
plit type/ultrasonic/characteristic wave/linear interpolation algorithm分类
信息技术与安全科学引用本文复制引用
张天恒,王培懿,张兴红,陈鸿雁..高精度分体式多通道超声波温度计的设计[J].传感技术学报,2016,29(2):177-181,5.基金项目
国家自然科学基金项目（51275551，51405049，51406020）；国家科技部重大科学仪器设备开发专项项目 （）
