可燃气体检测原理论文

With the diversity of social and economic development, buildings, structures, Applied Materials, the development of various industrial and science and technology, increase in combustible materials, coupled with people's living environment and lifestyle changes, the risk of fire is increasing, the number of firescasualties and economic losses caused by fire is gradually increasing. Fire as the enemy of endangering the survival of mankind, more attention has been paid. With the growing number of high-rise buildings, fire hazards increase. Event of fire, will people's lives and property caused great harm, so people began to seek a method of early detection of fire, in order to control and extinguish fires and to minimize losses, protect life safety.With the development of electronic science and technology, electronics technology has become a powerful means of security, many security aspects of electronic products, the right-hand man of the people's lives. This design uses a microcontroller technology with A / D conversion chip to build a combustible gas detector alarm. When the leak of flammable or toxic gases in the environment to the critical point of the combustible gas concentration reaches the alarm set, when the gas alarm detection, combustible gas alarm will send alarm signal to remind staff to take safety measures. This paper briefly describes the design combustible gas detection alarm as well as the advantages of the SCM system; then details the design flow of the combustible gas detection alarm, as well as hardware and software systems design and software programming detailed steps, including the various modules of the program design and system debugging and simulation steps, results.The design uses the MQ-2 gas sensor signal acquisition tool as a combustible gas, the collected analog voltage after the ADC0809 converted into digital signals. Single-chip digital signal acquisition to the ADC0809 has been calculated, if the combustible gas concentration reaches the critical point when the alarm is set microcontroller will drive the LED and buzzer alarm signal. In the case of non-combustible gases, the occurrence of unknown danger, the alarm can artificially control buttons to change the fire alarm initial value. 希望能帮到你

: with the development of social economy, buildings, structures the diversity of applied materials, all kinds of industry and the development of science and technology, flammable material increased, together with people living environment and lifestyle changes, increasing the risk of fire, fire, the fire caused the number of casualties and economic loss increase gradually. Fire is harmful to human survival as the enemy of, more and more attention by people. With the increasing of the high-rise building, fire hidden trouble increase. Once the fire, and will be of the lives and property of the people do great harm, so people begin to seek a kind of early detection method of fire, in order to control and extinguish fire, reduce loss, and safeguarding the safety of life.With the introduction of the development of science and technology, electronic technology to become effective means of the safety aspects of, many, many of the safety aspects of electronic products, is the life of people's right-hand man. This design using single chip computer technology with A/D conversion chip constructed A flammable gas detection alarm. When environment flammable or poisonous gas leak, when gas alarm detect combustible gas concentration reach the point of alarm Settings, flammable gas alarm will be issued a warning signal to remind workers to take security measures. This paper firstly introduces the design flammable gas detection alarm the main way and the advantage of single-chip microcomputer system; And then introduced the flammable gas detection alarm design process, and the hardware and software design of the system, and gives the software program design detailed steps, including each module of the program design and the whole system commissioning and simulation steps, the results.This design USES MQ-2 gas sensor as flammable gas the signal acquisition tools, the collected simulation voltage quantity after ADC0809 into digital signals. Single chip ADC0809 collection to the digital signal after calculation, if combustible gas concentration reach the point of single chip set alarm when will drive LED and a buzzer issued a warning signal. In no RanQiTi, some unknown risk, alarm can human control key change fire alarm initial value.