城市管理学院学 年 论 文题 目 声控报警器姓 名 程 艳 敏所在学院 城市管理职业学院 专业班级 08 届应用电子 学 号 0817027 指导老师 芳日 期 2024 年 10 月 26 日 声控报警器摘要：在当今社会上防盗系统越来越受到人们的重视。但是市场上的报警器大部分都是用于一些大公司财政机构。价格高昂,一般人们难以接受。假如再设计和生产一种价廉、性能灵敏可靠的防盗报警器，必将在防盗和保证财产安全方面发挥更加有效的作用。本课程主要介绍了简易的声控报警器的电路设计和电路板的制作。以此电路为依据只需更换相应的报警显示元件即可改装成不同类型的报警器，如红外报警器, 红外线声先报警器等。这种电路主要由声控放大电路、单稳态触发器电路、报警电路组成，设计利用压电瓷片作为声传感器获得信号并将其转换为电压信号，经场效应管放大后触发由 NE555 集成芯片构成的单稳态触发器和多谐振荡器,输出电压驱动蜂鸣器工作。经过调试，实现课程要求。关键字：场效应管 VT66；NE555；单稳态触发器；多谐振荡器Voice-activated alarm Abstract ：Today people pay more and more attention on anti-theft system. But the alarm on the market most of which are used in some large financial institutions. The high price of general is difficult to accept. If we can design and manufacture a kind of cheap and reliable performance of sensitive anti-theft alarm, that will guarantee the security and property security to play a more effective role. This course introduces the simple voice-activated alarm circuit design and circuit board production. Based on this circuit only shows the replacement of the corresponding components of the alarm can be converted into different types of alarms, such as infrared detectors, and the infrared detectors sound first. This circuit mainly by the voice amplifier circuit, monostable multivibrator circuit, alarm circuit, the design of the use of piezoelectric ceramics as a sound sensor and the signal was converted to voltage signals, amplified by the FET in...
