电磁无损检测仪中相敏检波技术的研究与实现  

Research and Realization of Phase-sensitive Detection Technology in Electromagnetic Nondestructive Testing Instrument

作　　者：史新民[1] 

机构地区：[1]常州信息职业技术学院机电工程学院,江苏常州213164

出　　处：《农业科技与装备》2013年第12期28-30,共3页Agricultural Science & Technology and Equipment

基　　金：江苏省常州市工业科技攻关计划项目(CE2008070)

摘　　要：根据铁磁性材料的矫顽力与含碳量之间局部呈线形关系的原理,介绍一种应用于电磁无损检测仪的相敏检波电路。在详细分析相敏检波数学模型的基础上,介绍该电路的总体设计思路,为精确测量钢铁材料的渗碳层深度和硬度提供条件。This paper regards the local linear relationship between the ferromagnetic materials coercivity and carbon content as the research principle, introduces a phase-sensitive detection circuit which applies in electromagnetic nondestructive instrument and analyzes its realization principle. This detection method can better deal with the weak signal and precisely measure the steel carburized layer depth and hardness.

关 键 词：相敏检波器 矫顽力 电磁检测 无损测试 微弱信号 

分 类 号：TG115.2[金属学及工艺—物理冶金]