双缓存超声TOFD数据采集系统设计 |
| |
引用本文: | 王瑾,王军. 双缓存超声TOFD数据采集系统设计[J]. 测控技术, 2014, 33(7): 35-38 |
| |
作者姓名: | 王瑾 王军 |
| |
作者单位: | 中国地质大学(武汉) 机械与电子信息学院;中国地质大学(武汉) 机械与电子信息学院 |
| |
基金项目: | 中国地质大学(武汉)中央高校基本科研业务费专项资金资助项目(CUG120119) |
| |
摘 要: | 针对数字式超声TOFD(超声衍射时差)无损检测系统对数据采集的高速、高精度要求,设计了一种基于FPGA和USB2.0的双缓存超声TOFD数据采集系统。该系统采用10-bit精度高速模数转换芯片AD9211,最高采样频率达120MH_z。使用LabVIEW编写上位机软件,实现波形的显示和存储,以及对采样频率、采样深度等的控制。本系统的双缓存设计不仅实现了高速数据的缓存,并且实现了上位机数据读取和A/D转换的同步,实验结果表明该系统能够满足数字式超声TOFD数据采集的需求。
|
关 键 词: | FPGA USB. 双缓存 TOFD 数据采集系统 |
Design of Dual-Cached Data Acquisition System for Ultrasonic TOFD |
| |
Abstract: | To meet the requirements of data acquisition for high speed and precision of digital ultrasonic TOFD (time of flight diffraction) nondestructive testing system,a dual-cached data acquisition system for ultrasonic TOFD based on FPGA and USB2.0 is designed.The high speed ADC chip AD9211 with the precision of 10-bit and maximum sampling rate of 120 MHz is adopted.The upper computer software is based on LabVIEW,which achieves display and adjustment of waveform,and controls sampling rate and sampling depth,etc.The design of dual-cache not only achieves the cache for high speed data,but also synchronizes the data reading of upper computer and A/D conversion.Experiment results validate that this system can meet the requirements of data acquisition of digital ultrasonic TOFD. |
| |
Keywords: | FPGA USB2.0 dual-cached TOFD data acquisition system |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《测控技术》浏览原始摘要信息 |
|
点击此处可从《测控技术》下载全文 |