基于单片机控制的金属探测器设计

发布时间：2018-04-04 19:25

本文选题：单片机　切入点：金属探测器　出处：《南京理工大学》2013年硕士论文

【摘要】：本论文主要介绍一种基于AT89S52单片机的手持金属探测器的电路组成、软件实现、工作原理及主要性能。以AT89S52单片机为核心的该金属探测器,主要由信号采集部分和信号处理部分组成。通过涡流传感器探测到的感应信号经过放大、峰值检波、模数转换后经由单片机进行信号的处理与判断,从而判定是否探测到金属,并报警。另外,本文还通过探讨认为影响仪器灵敏度的主要因素是检测线圈的尺寸和匝数及仪器的工作频率；影响仪器稳定性的因素是线圈的制作工艺、应用现场环境的温度、湿度及供电电源的稳定度。该金属探测器的设计还给它添加了接口可以和外围的系统进行通讯,这里实现了与外围液晶显示,键盘和AT89S52组成的外围数据处理与显示模块的通信,对前端探测到的数据进行再处理和分析,并将结果显示在液晶屏幕上,并可以通过键盘对前端的探测精度进行设置。
[Abstract]:This paper mainly introduces the circuit composition, software realization, working principle and main performance of a handheld metal detector based on AT89S52 microcontroller.The metal detector, which is based on AT89S52 microcontroller, is mainly composed of signal acquisition part and signal processing part.The inductive signal detected by eddy current sensor is amplified, the peak value is detected, and the signal is processed and judged by single chip microcomputer after A / D conversion, so as to determine whether the metal is detected and alarm.In addition, it is considered that the main factors affecting the sensitivity of the instrument are the size of the coil, the number of turns and the working frequency of the instrument, and the factors affecting the stability of the instrument are the making process of the coil and the application of the temperature in the field.Humidity and power supply stability.The design of the metal detector also adds an interface to communicate with the peripheral system, where the communication with peripheral data processing and display module composed of peripheral liquid crystal display, keyboard and AT89S52 is realized.The data detected in the front end are reprocessed and analyzed, and the results are displayed on the LCD screen, and the detection accuracy of the front end can be set by the keyboard.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH89;TP368.1

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