The Research Of The Fire Alarm System Based On ARM And UC/OS-â…¡

Along with the urban high-rise construction's development, the construction fire security brings to people's attention more and more. The fire alarm system is an important component of the building automatic system, It uses a variety of detectors to detect the fire, carries on the prompt accurate warning to fire's occurrence, and controls all kinds of fire extinguishing equipment to carry on the automatic fire fighting and to is related the equipment to carry on the linkage control. The traditional fire alarm system uses the computer center processing mode, each control center processes 2000 to 8000 survey unit's information, the promotion of the system's real-time performance and the stability fall under the control center data-handling capacity and the network communication speed limit.Based on this status quo, this paper proposed based on the ARM with the uC/OS-II network fire alarm system. Control center's data processing duty will hand over by each control unit, introduces the embedded operating system to carry on the management to the duty, simultaneously introduces the TCP/IP protocol stack to realize the network function, and carries on the information transmission using Internet.This paper has designed based on the ARM control unit hardware platform, and has carried on the hardware module test. ARM as the leader of 32-bit RISC chip, with high performance and effectiveness, and its lower cost, is very suitable in takes in system's control unit, and has guaranteed system's data-handling capacity and fire warning real-time from the hardware.In software, this paper transplant uC / OS-II as the system software platform, prepared to start and transplant-related code, and has done a transplant testing.uC/OS-II as an open-source embedded real-time operating system, the kernel has a very concise and excellent real-time performance and reliability, as the operating system platform of control unit for the management and scheduling tasks, has guaranteed system's stability and the reliability from the software.Finally, this paper has realized the network protocol stack LwIP transplant in the ARM and uC/OS-II foundation, has carried on the computer communication test. Through the transplantation, the control unit could complete the information's transmission and control through Internet, Enhanced the network extension and the toughness, and simultaneously got rid of the private network transmission speed and the scope limit.In this paper, the system has the characteristics of the distribution of intelligence, a number of embedded control units have substituted for the control center fire information processing, reduced the center data processing pressure and the network service pressure, the parallel network architecture enhanced system's stability, the individual control unit breakdown will not cause overall system's collapse, based on this mentality to establish a complete hardware and software platform of the fire alarm system.