摘要
针对声学测温高精度、实时性和抗干扰的性能要求,提出一种基于回波峰值特征统计方法测量声波飞渡介质温度的算法,设计系统采用以高速ADC模数转换芯片为外设,FPGA可编程逻辑芯片缓存高速采样数据,DSP数字信号处理器为运算核心的处理系统,对声波飞行时间ToF进行快速精确实时测量。实验结果表明,系统能准确跟踪接触式测温仪为参照的介质温度变化。与阈值法和互相关法对比,该算法适应嵌入式系统,运算速度快,抗干扰性强。
Acoustic thermometry system requirement is high-accuracy,real-time and anti-interference performance.This paper pre-sents a echo peak features acoustic thermometry method,and builds a acoustic thermometry system based on DSP and FPGA.We use high-speed analog-digital conversion chip for peripheral,FPGA cached data and DSP as the core of operation.This system measures the time of sonic flight accurately.Experiments show that the system can accurately track the temperature change of the medium with reference to the thermometer.Compared with the threshold method and the cross correlation method,this algorithm adapts to the embedded system,and has the advantages of fast operation and anti-interference.
出处
《电子技术应用》
北大核心
2017年第8期77-80,共4页
Application of Electronic Technique
基金
国家"973"计划基金资助项目(2013CB328903)
