摘要
基于LabVIEW软件开发了针对高温等极端环境下的电磁超声在线缺陷检测系统。软件重点开发集成了高温下判定缺陷当量的AVG曲线、超声波信号的定位、温度实时监控及滤波处理算法等功能模块。硬件主要开发基于自制耐高温陶瓷线圈及水循环冷却系统的可持续长时间接触高温的超声SV波激发/接收传感器,并配置了高功率脉冲RPR-4000主机和阻抗匹配网络为其提供高功率。系统运行试验表明:在500℃高温环境下,软件开发的AVG曲线能够精确地检测出缺陷的当量大小,并可通过超声波飞行时间和超声波测速确定缺陷的位置。另外,自主开发的电磁超声传感器在500℃高温环境下可持续检测达2 h以上。
The electromagnetic ultrasonic online detection system based on LabVIEW is developed,which is applied for extreme conditions such as high temperature. The software mainly focuses on the integration of functional modules including the AVG curve for defect quantification under high temperature,the positioning of the ultrasonic signal,the real-time monitoring of temperature and filtering algorithms. The hardware concentrates on the development of the ultrasonic SV wave excitation/reception transducer with high-temperature-resistant ceramic coils and water circulation system for persistent long-term exposure to high temperature,and configures with RPR-4000 and impedance matching network to provide high power. Experiment results show that the modified AVG curve can acquire the defect size precisely,and the system can determine the location of defects by ultrasonic flight time and ultrasonic velocity measurement under 500 degrees. In addition,the self-developed electromagnetic acoustic transducer can work continuously for over 2 hours under high temperature.
作者
杨键刚
吴运新
龚海
李伟
韩雷
YANG Jiangang;WU Yunxin;GONG Hai;LI Wei;HAN Lei(School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第5期809-814,820,共7页
Chinese Journal of Sensors and Actuators
基金
国家科技支撑计划项目(2014BAF12B01-01)
高性能复杂制造国家重点实验室自主研究课题项目(ZZYJKT2017-06)
