摘要
介绍了一种基于AT 89S52单片机控制的智能型金属探测器的硬件组成、软件设计、工作原理及主要功能.该金属探测器以AT 89S52单片机为核心,采用线性霍尔元件UGN 3503作为传感器来感应金属涡流效应引起的通电线圈周围磁场的变化,并将磁场变化转化为电压的变化,单片机将测得电压值与试验测定的基准电压值相比较,以确定是否探测到金属.在软件设计中,采用了数字滤波技术消除干扰,提高了探测器的抗干扰能力,确保了系统的准确性.
The hardware structure,software design, working principles and the functions of an intelligent metal detector which mainly consists of Single Chip Mieyoco AT89S52 and linear Hall-effect Sensor are described. The equipment adopts UGN3503U linear Hall-effect sensor as a probe to detect the magnetic changes of the centre of a search coil resulted from eddy current effect and transfers the magnetic change into voltage signal. The SCM measures the peak value of voltage. It is compared with reference voltage in order to determine whether metal is detected or not. In case of detection of a metallic mass,the metal detector provides an acoustical and optical alarm. The software was written in assembler language. Digital filter technology is utilized to eliminate the jamming and to improve measurement accuracy.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第2期185-189,共5页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古教育厅(ZC0001)
关键词
单片机
金属探测器
线性霍尔元件
电磁感应
涡流
SCM （Single Chip Micyoco）
metal detector
linear Hall-effect sensor
electric-magnetic induction
eddy current
