基于FPGA的新型密度测量仪设计  

New Density Meter Design Based on FPGA

作　　者：张兴红[1] 陈鑫[1] 蒋洪庆[1] 何涛[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机械检测技术与装备教育部工程研究中心,重庆400054

出　　处：《仪表技术与传感器》2016年第5期21-24,共4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(cstc2012jj A70004);重庆理工大学研究生创新基金资助项目(YCX2014222)

摘　　要：作为影响生产工艺的一项重要指标,密度的实时、精密测量意义重大。超声波测量技术无损、精确、环保,越来越多地被用来实现高精度密度测量。将传播介质本身作为敏感元件,通过声速法测量超声波传播时间,再结合超声波在介质中传播时传播速度受介质密度影响的特性,只需要精密测量传播时间即可实现介质密度的高精度测量。基于FPGA的控制处理电路,能够完成数据的高速采集和实时存储,结合软件设计中的数字插补算法,为ns级的高精度时间测量提供了软、硬件基础,进而确保了高精度的密度测量。As a vital index of industry production process,precise and real- time measurement of density is significant. The ultrasonic technology was widely used in the high- precision measuring of density because of nondestructive,precise and environmental. The propagation medium was used as a sensitive element,and propagation time can be measured through method of velocity. Combing with the characteristic that propagation velocity was affected by the density of medium when propagating,accurate measurement of time can realize high- precision measuring of density. Circuit,based on FPGA,can complete high- speed data acquisition and real-time storage of data. Together with digital interpolation algorithms in software design,it lies foundation for precise time measurement of nanosecond,which can ensure high-precision density measurement.

关 键 词：FPGA 超声波 密度 高精度 

分 类 号：TH835[机械工程—仪器科学与技术]