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The Research of the Fire Alarm System Based on ARM and uC/OS-Ⅱ

Author: ChenMingFeng
Tutor: FangHouHui
School: Hunan University
Course: Theory and New
Keywords: Fire alarm and linkage control system Embedded Systems ARM technology uC / OS-II LwIP
CLC: TP277
Type: Master's thesis
Year: 2009
Downloads: 341
Quote: 2
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Abstract


With the development of urban high-rise buildings, building fire safety has drawn increasing attention. Fire alarm systems in building automation systems is an important component, which uses a variety of detectors to detect a fire, a fire occurred on the timely and accurate alarm, and control a variety of automatic fire extinguishing devices and related equipment control linkage . Conventional fire alarm system using computer central processing approach, each control center handling 2000-8000 detection unit information, real-time system with improved stability under control center data processing power and network communication rate restrictions. Based on this situation, this paper, based on ARM and uC / OS-II network of fire alarm systems. The control center data processing task for each control unit, the introduction of embedded operating system to manage tasks, while the introduction of TCP / IP protocol stack to achieve network function, use the Internet to transmit information. This paper designs a control unit based on ARM hardware platform, and make the hardware module testing. As a 32-bit RISC ARM chip leader, with high processing power, while its lower cost, very suitable for use as the system control unit, from hardware to ensure the system's data processing capabilities and the fire alarm in real time. In software, this transplant uC / OS-II as the system software platform, the preparation of starting and transplant-related code, and do a transplant testing. uC / OS-II as an open source embedded real-time operating system, the kernel has a very streamlined and excellent real-time and reliability, as a control unit for operating system platform management and scheduling tasks, from software to ensure the stability of the system and reliability. Finally, in the ARM and uC / OS-II based on the realization of the network protocol stack LwIP transplant, carried out computer communication test. Network protocol stack migration of the control unit to complete the transmission of information via the Internet and control, improve network scalability and robustness, and get rid of the private network transmission speed and range limitations. In this paper a system with distributed intelligent features, the control unit instead of a plurality of embedded control center fire information processing, reduced pressure and the central data processing network traffic pressure, parallel network structure to improve the stability of the system, the individual control units failure does not cause the collapse of the entire system, based on this idea of ??the fire alarm system has established a complete hardware and software platform.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Monitoring, alarm,fault diagnosis system
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