基于單片機(jī)的微波防盜報(bào)警器設(shè)計(jì)

摘要：本文基于單片機(jī)設(shè)計(jì)了一個(gè)微波防盜報(bào)警系統(tǒng)。該系統(tǒng)控制核心用的是AT89C52，主要包括微波探測(cè)器、熱釋電式紅外傳感器、單片機(jī)控制、信號(hào)放大及相關(guān)的驅(qū)動(dòng)電路組成。本設(shè)計(jì)操作簡(jiǎn)單、運(yùn)行可靠，除了具有基本的防盜報(bào)警功能，還能夠?qū)崿F(xiàn)自動(dòng)探測(cè)信號(hào)和自動(dòng)報(bào)警功能。自動(dòng)探測(cè)是由熱釋電紅外傳感器和微波探測(cè)器共同完成，雙探測(cè)器的應(yīng)用使得系統(tǒng)的可靠性大大增強(qiáng)，誤報(bào)率明顯降低；自動(dòng)報(bào)警是指當(dāng)單片機(jī)接收到由探測(cè)器檢測(cè)到入侵信號(hào)時(shí)，通過(guò)程序控制自動(dòng)輸出報(bào)警信號(hào)引發(fā)揚(yáng)聲器和LED發(fā)光報(bào)警。

關(guān)鍵詞：微波探測(cè)器；單片機(jī)；熱釋電式紅外傳感器；防盜報(bào)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(shè)計(jì) 4

2.1 整體電路框圖 4

2.2 報(bào)警器的功能及工作過(guò)程 4

3 系統(tǒng)硬件設(shè)計(jì) 5

3.1 電源模塊 5

3.2 控制模塊 5

3.2.1 AT89C52單片機(jī)介紹 6

3.2.2 復(fù)位、晶振電路的設(shè)計(jì) 7

3.3 探測(cè)器模塊 7

3.3.1 熱釋電紅外線探測(cè)器 8

3.3.2 微波感應(yīng)模塊 11

4 信號(hào)處理模塊 13

4.1 HN911L的輸出信號(hào)處理模塊 13

4.2 HB100輸出信號(hào)處理模塊 13

5 聲光報(bào)警模塊 14

5.1 報(bào)警電路的設(shè)計(jì) 14

5.2 蜂鳴器報(bào)警電路的設(shè)計(jì) 14

5.3 LED顯示模塊 15

5.4 手工暫停模塊 16

6 軟件的程序?qū)崿F(xiàn) 17

6.1 中斷服務(wù)程序工作流程圖 17

6.2 主程序工作流程圖 17

7 總結(jié) 19

參考文獻(xiàn) 20

附錄1：程序 21

附錄2：微波報(bào)警原理圖 23