数 显 金 属 探 测 器 的 设 计 学 院 ： XX 专 业 ： XX 姓 名 ： XX 学 号 ： XX 指 导 老 师 ： XX 职 称 ： XX 中 国 •珠 海 二 ○一五年 Abstract With the rapid development of micro-electronics and computer technology, the traditional metal detection systems are moving toward a new direction of renovating and developing. Metal detector now comes into many aspects of out social life and industrial production, from the initial application in the detection of underground metal mine and military mine-detection to the current travel security, food, terrorism, metallurgy, and medicine and so on. With the continuous advancement of technology and the effect of metal detector in social life and industrial production, how to enhance the capability of metal detection equipments, become an urgent issue in that area. Firstly on the theoretical analysis of the metal detector to do a specific elaboration, and from the hardware and software aspects of the design of the system were introduced in detail. AT89S52 microcontroller core, using linear Hall element UGN3503 as sensors for sensing the metal vortex effect caused by the magnetic field of the coil is energized, and the magnetic field change into a voltage change in the measured voltage microcontroller, and with the set voltage compared with the reference value to determine whether the detected metal. Software uses digital filtering techniques to eliminate interference, improve anti-interference ability of the detector to ensure the accuracy of the system. Key Words: Metal detectors, linear Hall element, electromagnetic induction, eddy current sensor 目 录 1 绪 论 1 1.1 研 究 背 景 及 意 义 1 1.2 金 属 探 测 器 的 国 内 外 研 究 现 状 2 1.3 ...
