基于單片機的微波防盜報警器設計

摘要：本文基于單片機設計了一個微波防盜報警系統(tǒng)。該系統(tǒng)控制核心用的是AT89C52，主要包括微波探測器、熱釋電式紅外傳感器、單片機控制、信號放大及相關的驅動電路組成。本設計操作簡單、運行可靠，除了具有基本的防盜報警功能，還能夠實現(xiàn)自動探測信號和自動報警功能。自動探測是由熱釋電紅外傳感器和微波探測器共同完成，雙探測器的應用使得系統(tǒng)的可靠性大大增強，誤報率明顯降低；自動報警是指當單片機接收到由探測器檢測到入侵信號時，通過程序控制自動輸出報警信號引發(fā)揚聲器和LED發(fā)光報警。

關鍵詞：微波探測器；單片機；熱釋電式紅外傳感器；防盜報警

 The Design of Microwave Anti-theft Alarm Circuit

       College of Physics and Electronic Information  Electronic Information Science and Technology

Abstract : This system includes two parts: hardware design and software design. Hardware design is consisted by microwave detector circuit design, pyroelectric infrared sensors design, single-chip microcomputer control circuit design, signal amplifier circuit design and relevant driver circuit design. The whole system is controlled by the system software. This topic designs a simple and reliable operation of the anti-theft alarm system based on single chip. It has a basic security alarm function ,and it can automatically detect the signal and realize the automatic alarm. Automatic detection is completed by both of pyroelectric infrared sensors and microwave detector. Double detector application makes the system reliability greatly enhanced, it also reduced the rate of false positives. The automatic alarm means that when microcontroller receives the invasion signal by the probe detector, it will automatically output alarm signal to trigger the speaker and LED through the program controlling.

Key words: Microwave detector; MCU; Pyroelectric infrared sensors; Anti-theft Alarm

目    錄

摘要 1

1 引言 3

2 系統(tǒng)總體方案設計 4

2.1 整體電路框圖 4

2.2 報警器的功能及工作過程 4

3 系統(tǒng)硬件設計 5

3.1 電源模塊 5

3.2 控制模塊 5

3.2.1 AT89C52單片機介紹 6

3.2.2 復位、晶振電路的設計 7

3.3 探測器模塊 7

3.3.1 熱釋電紅外線探測器 8

3.3.2 微波感應模塊 11

4 信號處理模塊 13

4.1 HN911L的輸出信號處理模塊 13

4.2 HB100輸出信號處理模塊 13

5 聲光報警模塊 14

5.1 報警電路的設計 14

5.2 蜂鳴器報警電路的設計 14

5.3 LED顯示模塊 15

5.4 手工暫停模塊 16

6 軟件的程序實現(xiàn) 17

6.1 中斷服務程序工作流程圖 17

6.2 主程序工作流程圖 17

7 總結 19

參考文獻 20

附錄1：程序 21

附錄2：微波報警原理圖 23