Devices Of Detection, Alarm And Control For Household Gas Leakage

Coal gas has become one of the essential energy in people's lives. But coal gasleakage incidents often happen, it brings a lot of hidden dangers to people's family life.How to prevent coal gas poisoning and explosion accidents has became the urgentproblem to be solved. Currently, many different types of household gas alarm are soldon the market, but all of them have shortcomings. So we design a new type of thedevices of detection, alarm and control for household gas leakage, the devices put thedegree of gas leakage divide into three levels, there are light leakage, mild leakageand severe leakage, automatically make the appropriate reaction according to the levelof gas leakage, without going through the single-chip A/D, D/A conversion andcomplex data processing to improve the running speed and reliability.We use network communication technology in the alarm devices. This devicescan give an alarm to the outside world through a fixed telephone line, avoid resultingin rise to serious accidents when the user is not at home.This devices take the concept of modular design, mainly is divide into six partswhich include gas leakage detection module, automatic telephone dial-up alarmmodule, power supply module, Human-machine interface module and the maincontrol module. According to the six parts above, this article describes the design ofhardware and software in detail, the principle of the core chip and chip peripheralcircuits, the connection between the chip and the chip circuitry and programmingmethod.In the final, the article makes a summary of this design and puts forward theshortcomings.