| 一种电话自动报警系统研究 |
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| 引用本文： | 张博夫.一种电话自动报警系统研究[J].深圳职业技术学院学报,2009,8(5):26-30. |
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| 作者姓名： | 张博夫 |
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| 作者单位： | 深圳职业技术学院电子与信息工程学院,广东,深圳,518055 |
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| 摘 要： | 介绍一种由单片机89C51、DTMF收发芯片MT8888、单片语音录放电路ISD1420构成的电话自动报警系统．应用MT8888的信号检测功能，分析了电话信道各种实际信号特点，实现信号的识别和被叫摘机的判断；应用MT8888的发、收功能，实现自动拨号报警和用户确认；应用ISD1420的语音录、放音功能，实现报警语音分段播放。
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| 关 键 词： | 单片机 拨号报警 摘机 |
Automatic Telephone Alarm System |
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| ZHANG Bofu.Automatic Telephone Alarm System[J].Journal of Shenzhen Polytechnic,2009,8(5):26-30. |
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| Authors: | ZHANG Bofu |
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| Institution: | ZHANG Bofu ( School of Electronics and Information Engineering, Shenzhen Polytechnic, Shenzhen, Guangdong 518055, China ) |
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| Abstract: | Automatic telephone alarm system composed of single chip computer 89C51, DTMF Transceiver MT8888 and single chip voice record/playback circuit ISD1420 is introduced. The features of varied practical signals in telephone channels can be analyzed, and signals can be identified and off-hook can be detected automatically by applying signal detection function of MT8888. Automatic dialing alarm and user confirmation can be realized when sending/receiving functions of MT8888 are triggered. Alarm voice can be piecewisely played by applying voice record/playback functions of ISD 1420. |
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| Keywords: | single chip dialing alarm off-hook |
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