防盗报警系统的设计 毕业论文_精品.doc

摘 要 防盗报警系统的设计是为满足现代住宅防盗的需要所设计的家庭式电子防盗系统，该系统是指当非法侵入防范区时，引起报警的装置，它是用来发出出现危险情况信号的。防盗报警系统就是用探测器对建筑内外重要地点和区域进行布防。它可以及时探测非法入侵，并且在探测到有非法人侵时，及时向有关人员示警。 Abstract The design of anti-theft alarm system is for the family of electronic security systems designed to meet the needs of modern residential burglar. Anti-theft alarm system uses the combination sensor which consists of Pyroelectric infrared sensor and Vibration transducer for displacement,the fixing of this alarm is covert, after has been processed by SCM, the signal of alarm communicates with PC, which is convenient for uniform management. Anti-theft alarm design includes hardware part and software part.The hardware part of the design includes detection circuit receiving the signal, the LED control circuit to control light-emitting and driving the implementation of the implementation of the alarm circuit to alarm.The software part of the design includes programs like interrupt,timing to achieve the role of acousto-optic alarm,etc.The functions of the design is simple and pratical.When people go out,we can set the alarm system in the conditon of protection ,the detector begins to work. Pyroelectric infrared sensor will detect the action when people break in ,and the infrared probe setted in the observing point will convert the infrared radiation and the displacement of the vibration from the human body into the electrical signal.The signal is sent to the threshold switch through amplifier circuit and comparison circuit,then open the threshold valves and send out the TTL level,then send it to the AT89C51 SCM via the latch,and make the performing alarm circuit sounding via the processing oprations of the SCM . KEYWORDS SCM;infrared sensor;signal receiving;alarm circuit  第1章 绪 论 随着社会经济的飞速发展，人们对其住宅的要求也越来越高，表现在不仅希望拥有舒适的住所，而且对安全性、智能性等方面也提出了更高的要求。本文设计了一种新型盗报警系统，能可靠的进行日常安全防范工作，及时发现各种险情并通知户主，以便将险情消灭在萌芽状态。 1.1 课题背景 随着电子通讯技术的飞速发展，单片机以其具有体积小、价格低、集成度高、性价比高等突出优点已在工业控制、智能仪表、数控机床、数据采集以及各种家用电器等方面得到了广泛应用。因此，利用单片机