基于HMC1001的铁磁金属检测系统设计  

Design of HMC1001-based ferromagnetic metal detecting system

作　　者：陈凯 秦会斌[1] CHEN Kai;QIN Hui-bin(Institute of New Electronic Device ＆ Application, Hangzhou Dianzi University, Hangzhou 310018, China)

机构地区：[1]杭州电子科技大学新型电子器件与应用研究所,浙江杭州310018

出　　处：《传感器与微系统》2018年第4期92-93,97,共3页Transducer and Microsystem Technologies

摘　　要：针对金属检测,根据惠斯顿电桥原理,将磁场转换成微弱的电压信号,将电压信号通过差分放大电路进行放大,从而获得可以处理的电压信号,通过对电路进行优化使传感器工作更加稳定和准确。实验表明:在一定范围内存在铁磁类金属时,磁阻传感器HMC1001可以检测铁磁类金属引起的磁场变化,设计可以广泛用于食品、制药、日化等行业。Aiming at metal detection,according to theory of Wheatstone bridge,magnetic field is transformed into weak voltage signal,the voltage signal is amplified by differential amplifier circuit to obtain voltage signal which can be processed,through optimization of the circuit,so as to make sensor work more stably and accurately.Experiments show that within a certain range of ferromagnetic metals,HMC1001 can detect changes in magnetic field caused by ferromagnetic metals.It can be widely used in food,pharmacy,daily use chemicals,and so on.

关 键 词：磁传感器 惠斯顿电桥 铁磁金属 HMC1001 

分 类 号：TH89[机械工程—仪器科学与技术]