系统

The design of Gas Detection system based on single chip microcomputer

Q广东·钱锋：我使用Windows XP SP2自带的IE浏览器，为什么每次退出IE亏，IE临时文件夹便被清空，而我也没安装其他类似于优化的软件。请问这是什么原因？

Nowadays,the gas stove possessed some shortages such as the deficiency of safety and the absence of the timing function etc.Therefore,single chip microcomputer AT89C51 is used to improve the performance of gas stove through controlling the operation state of every circuit in this system.The gas density in a definite area can be directly sampled by gas-electricity sensor QM-N5,the sampling value can be directly converted into electrical signal and transmitted to single chip microcomputer AT89C51.The watch-dog circuit is composed of 555 time base circuit and a piece of 74123.The timing purpose can be directly attained by using single chip microcomputer AT89C51 to control the on-off state of electromagnetism valve.This system is connected with a fixed telephone by ISD4004 audio chip and MT8888 dialing chip.When the gas leaks ,single chip microcomputer controls the dialing circuit to realize the function of automatic alarm.The safety performance and using function of gas stove are improved.