光电防盗报警系统概要

学院

毕业设计（论文）题目：光电防盗报警系统

院部：机电工程学院

专业：机电一体化

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二O O 年月日

摘要

安全防范技术涉及到社会的方方面面，是保护国家和人民利益与安全的重要手段。本文设计了一种基于热释电红外一微波双探测技术的新型光电防盗报警系统，双探测技术是将两种探测技术结合在一起，以“相与”的关系来触发报警。热释电红外传感器感应,入侵者的身体阻挡红外热辐射，将其转换成超低频信号，经电路放大，输出。同时由于微波探测器接收到的回波信号的频率(或相位)发生变化，经过电路处理后转变为电信号，输出。两组信号同时到达与门，经判断，电路再将报警信号通过天线发射出，可以用接收电路或收音机接收报警信号。本文设计的光电防盗报警系统，经实验测出其技术指标为:探测距

本文设计的光电防盗报警系统，经实验测出其技术指标为:探测距离不大于 5 0m，微波中心频率fo = 2000 MHz，能经受25 -1 OOOMHz范围内的频率干扰，相距3m处可经受住1 OOW干扰信号。该系统可广泛应用于社会上的重要单位和要害部门，如军事设施、国家的动力系统、通讯系统、仓库、各类银行等等。

关健词:红外探测器微控制器防报警系统微波

ABSTRACT

The safety-defending techniques are involved in most aspects of thesociety and they are

very important in protecting the benefit and security ofthe people and the country. Based on the pyroelectric infrared-microwavedouble detecting technique, this paper designed a new photoelectric securityalarming system. Double detecting technology integrates the two detectingtechnology, with the relation of "together" to trigger the alarming system.The infrared radiation (human body temperature) of intruders was sensed bythe Pyroelectric infrared sensor and then was changed into ultra lowfrequency signals. The signals were amplified by the circuit and then beenoutput. At the same time, the frequency (or phase) of echo signals which themicrowave detector received was changed. The changes transformed intoelectric signals and then output after the circuit processing. After judging thetwo groups of signals which reached the logic product gate at the same time,the circuit launched alarm signal through the antenna. The alarm signals canbe received by the accepting circuit or the radio.

The results of the photoelectric security alarming system weremeasured by experiments, they are: probing range is not smaller than 10m,the microwave centre frequency is fo=2000 MHz, this system can stand inthe range of 25 ^-1000MHz frequency disturbance, and can withstand 100 Winterfering signals in the distance of 3m. The system can be widely used inthe important departments of society such as military installation, nationalpower system, communication system, warehouses, and in all kinds of banks, etc.

Key words：Infrared detector Microwave Microchip Cuard against theft and alarm system

目录

第一章绪论 (1)

1.1引言 (1)

1.2光电防盗报警系统的发展现状 (1)

1.3本设计研究的目的及意义 (1)

1.4本设计的主要工作和创新点 (1)

第二章光电防盗报警器的基本原理 (2)

2.1系统硬件的基本原理 (2)

2.2软件设计 (5)

2.3系统测试 (6)

2.4报警系统的安装 (7)

第三章结论 (7)

致谢 (7)

参考文献 (8)

第一章绪论