基于FPGA的声发射检测仪的设计
Acoustic Emission Detector Design Based on FPGA
摘 要
为了检测材料受变形和断裂时所产生的声波信号,研制一种基于FPGA的声发射检测仪.该检测仪首先将传感器检测的信号进行放大、增益调节后,将模拟信号送入14位AD9240进行模数转换.当采样值大于设定门限,触发声发射检测事件,并同时将采集的4路数据存入SDRAM中.当一个声发射事件结束后,将采集的数据通过无线通信送至上位机进行存储、分析处理、显示等操作.
触发控制
模数转换
Acoustic emission
Trigger control
Analog to digital conversion
Abstract
A FPGA-based acoustic emission detector was designed to detect acoustic signal brought about by the material deformation and fracture.Firstly,the detection signal from the sensor was amplified and gain was adjusted;Then analog to digital conversion for the modulated analog signal was implemented by 14 bit AD9226;When sampled value is greater than the set threshold,an acoustic emission event shall be triggered and data of 4-channel are acquired and stored in SDRAM;When an acoustic emission event is ended,the data will be transferred to the host computer by wireless communication,and then be analyzed,processed,displayed,and so on.
中图分类号 TG115.28
所属栏目 仪器研制
基金项目 四川省教育厅资助项目(14ZB0118)
收稿日期 2014/9/28
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备注王银玲(1979- ),女,博士,讲师,主要从事智能化信号检测与故障诊断研究.
引用该论文: WANG Yin-ling,LI Hua-cong. Acoustic Emission Detector Design Based on FPGA[J]. Nondestructive Testing, 2015, 37(3): 59～63
王银玲,李华聪. 基于FPGA的声发射检测仪的设计[J]. 无损检测, 2015, 37(3): 59～63
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