重庆大学学报2017，Vol.40Issue(5)：19-28,10.DOI:10.11835/j.issn.1000-582X.2017.05.003
复合绝缘子伞裙老化状态检测的单边核磁共振传感器
Unilateral NMR sensor for assessing the aging status of composite insulator sheds
摘要
Abstract
Assessing the aging status of composite insulator sheds concerns the security and stability of power system.In order to realize nondestructive examination of the sheds of composite insulators at project site,the design of a portable unilateral NMR(nuclear magnetic resonance) sensor was proposed.We optimized the homogeneity of the static magnetic field and the RF(radio-frequency) coil to obtain high SNR (signal to noise ratio).The tested samples were the sheds of three composite insulators from 110 kV lines serviced for different years in the same area,and the standard CPMG sequence was employed.The measurement data was processed by both single exponential fitting and inverse Laplace transform.It shows that an increase of the service time of the composite insulators resulte in a decrease of the equivalent transverse relaxation time.Therefore,the portable unilateral NMR sensor has the potential to assess the aging status of composite insulator sheds.关键词
复合绝缘子伞裙/老化状态/核磁共振/无损检测Key words
composite insulator sheds/aging status/nuclear magnetic resonance/nondestructive examination分类
信息技术与安全科学引用本文复制引用
杨挺,余登洁,夏云峰,尹创荣,尹成,徐征,何为..复合绝缘子伞裙老化状态检测的单边核磁共振传感器[J].重庆大学学报,2017,40(5):19-28,10.基金项目
国家自然科学基金面上项目(51377186). Supported by National Natural Science Foundation of China(51377186). （51377186）
