The Study and Design of Automatic Dial-up Module of Smoke Intelligent Alarm System On ATM89C52
Student majoring in Automation
Tutor
Abstract:With the modern home with fire, electricity consumption increases, the frequency of home fires is getting higher and higher. Smoke detectors have also been widely used in various occasions. This design is combined with the use of single-chip sensor technology development and design of the smoke alarm system.It uses AT89C52 single-chip as MCU, EEPROM memorizer to store telephone number and DTMF chip MT8880 as dial-up chip. When danger exists, the detector will give the interrupt request to the single-chip, and then simulation of extraction machine will be achieved by single-chip control of telephone interface circuit. Automatic dial-up will be carried out by DTMF dial-up circuit. The pre-recorded voice information will be played by the voice circuit so as to achieve voice alarm. And the users can set and change the automatic dialed telephone numbers by keyboard. It is convenient and flexible.
Key words:SCM;Automatic alarm system;Mt8880