1、 1 摘摘 要要 报警器的应用非常广泛。在汽车、摩托车报警器，仓库大门，以及家庭保安系统 中，几乎无一例外地使用了报警器电路。 本文设计了一种光电式报警器，该报警器通过感光器件把光信号转换成电信号， 控制数码管的显示以及报警电路。利用了部分数字逻辑电路，能在报警过程中实现对 应路数的显示功能。设计电路中用到了光耦、或门等元器件。该报警器的设计采用模 块化结构，有三个模块即光电转换模块、数字显示模块以及声光报警模块组成。各模 块功能独立，可扩充性强，很有经济利用价值。光电报警器的使用简单，可靠性高， 与传统的报警器相比较，光电报警器可应用的范围更加地广泛,它可应用于传统报警 器不能应用的范围，如
2、火灾探测、煤气泄露报警、交流电流越限报警、玻璃破碎探测 等。 关键词：光耦;或门;光电转换;数字显示;声光报警 2 ABSTRACT Alarm is widely used in daily life. It almost without exception used the alarm circuit in the automotive, motorcycle alarm, warehouse doors and home security systems. This article has designed a photoelectric alarm that through the l
3、ight-sensitive device to convert light into electrical signals to control the digital display and alarm circuits. Using some of the digital logic circuits, it can correspond to large ones to achieve the alarm during the display. Design circuit used in optical coupler and or gate component, and so on
4、. The alarm was designed with modular structure. There are three modules that photoelectric conversion module and digital display module and the sound and light alarm module. The functions of each module are independent, and it has wonderful scalability and great economic value. Photoelectric alarms
5、 is used simply, and it high reliability. Compared to the traditional alarm, photoelectric alarm is more applicable to wide range. It can be used in the traditional range of alarm can not be applied, such as fire detection, gas leakage alarm, AC current-limit alarm, glass break detection and so on.
6、Key words: optical coupler; or gate; photoelectric conversion; digital display ; acousto-optic alarm I 目 录 摘 要 . 1 1 引 言 . II 2 设计要求 2 2.1 基本设计要求 2 2.2 提高要求 2 3 基本要求电路的实现 . 3 3.1 系统工作原理及其组成 3 3.2 设计方案比较和选择 3 3.3 元器件介绍 5 3.4 单元模块. 11 3.4.1 光电转换模块 11 3.4.2 数字显示模块 . 11 3.4.3 声光报警模块 . 13 3.5 电路总体设计 . 15 4 提高要求电路的实现 . 1 4.1 系统工作原理及其组成 1 4.2 元器件介绍 1 4.3 单元模块 4 4.3.1 计数器模块设计 4 4.3.2 数字显示模块 . 5 4.4 电路总体设计. 5 5 电路的焊接与调试 . 1 II 5.1 焊接注意要点 . 1 5.2 调试要点 . 1 5.2.1 基本设计电路调试 1 5.2.2 提高设计电路调试 2 5.2.3 两个电路的链
