Design And Implementation Of Creepage Fire Alarm System Based On CAN-bus

As the development of economic and technology, throughout the country, more and more high-rise building was build. There are more and more floors, and luxurious interior design. In high-rise building there are many internal staircases, escalators and all kinds of pipelines. This just like place a bomb in the buildings. And air-conditioning and channels of ventilation exhaust increase the probability of fire.In order to prevent electrical fires,article 9.5 in GB50045-9 Code for fire protection design of high-rise buildings rules that in the place of the fire risk is large in high-rise building and densely populated,fire alarm is needed. When the fire broke out, fire alarm system can get alarm information as quickly as it can and take corresponding measures. It can control danger in the early fire and reduce the probability of a major fire, economic losses and personal injury. Intelligent fire alarm system is the inevitable trend of development of fire alarm technology.Nowadays, the fire alarm system and fire facilities in shopping malls and office buildings can independently deal with fire accident. But the scope is only a regional or local area. Monitoring independent alarm system in every region consumes resources, limits the fire information management level and is not conducive to centralized control and scheduling. In 2006, there were 300,000 cases of fire in the whole country, which electrical fires accounted for 28.1%.80 percents of extremely serious fire is electrical fires.54.3% of electrical fires are caused by creepage. To solve the above problem, we have proposed the creepage fire alarm system based on CAN-bus. It implements the decentralization of the monitoring and control and effectively prevents the fire.In this paper, we analyze the lack of traditional alarm system and improve it on this base. According to the response rate, the scope of communication and stability, we design hardware circuit of data collection, CAN-bus network and data storage. And we add embedded operating systemμCOS-II. We divide application into a number of tasks and design the data collection, data storage and communications as tasks. It simplifies the software design of applications and guarantee real-time system.