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湖北理工学院 毕业设计(论文)外文文献翻译
4 System implementation
The local station: Fig. 3 is the block diagram of the circuit used to utilize the MC68HCllA4 as a remote fire detecting circuit while Fig. 4 illustrates the same
circuit in an expanded form. It can be seen that the single microcontroller can be used to monitor more than one detector, thus reducing system cost.
The loop power supply, which is usually between 28 and 26 V, is further regulated by a 5 V 100 mA monolithic low power voltage regulator to supply power to the microcontroller. The onboard oscillator, coupled with an external crystal of 2.4576 MHz, supplies the microcontroller with its timing signal which is divided internally by four to yield a processor frequency of 614.4 kHz, which is an even multiple of the RS 232 [7] baud rate generator. In this Section the term ‘supervised input or output’ will be used to mean that the function in question is monitored for open- and short-circuit conditions in addition to its other normal functions. More information can be found in Reference 9.
5 Main loop
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6 Conclusion
This paper describes the development of a large scale fire detection and alarm system using multi-single chip microcomputers. The architecture used is a two-level hierarchy of decision making. This architecture is made possible by the new CMOS microcontrollers which represent a high packing density at a low power consumption yet are powerful in data processing and thus in decision making. Each local station could make an autonomous decision if the higher level of hierarchy allows it to do so. It has been tried to keep the system design in general format so it can be adapted to varying situations. A prototype of the described system has been built and tested [10]. The control part of the central station is implemented with a development card based on MC 68000 microprocessor (MEX 68KECB, by Motorola), which has a built-in
湖北理工学院 毕业设计(论文)外文文献翻译
monitor called Tutor. The application programs were developed using the features provided by this monitor. The local stations’ controllers were designed using the MC 68705R3, single-chip microcontroller.
7 References
1 ‘Fire protection guidelines for nuclear power plants’, US NRC Regulatory Guide 1.120
2 BAGCHI, C.N.: ‘A multi-level distributed microprocessor system for a nuclear power plant fire protection system controls, monitoring, and communication’, IEEE Trans., 1982
3 PUCILL, P.M.: ‘Fire hazard protection, detection and monitoring systems’, Sea. Con, 2, Proceedings of Symposium on ADV in offshore and terminal measurement and control systems, Brighton, England, March 1979, pp. 353-363
4 HEAVISID, L.: ‘Offshore fire and explosion detection and fixed fire’. Offshore Technological Conference, 12th Annual Proceedings, Houston, Texas, May 1980, pp. 509-522
5
CELLENTANI,
E.N.,
and
HUMPHREY,
W.Y.:
‘Coordinated
detection/communication approach to fire protection’, Specify: Eng.,
6 ‘Motorola Microprocessors Data Manual’ (Motorola Semiconductor Products, Austin, Texas, USA)
7 Electronic Industries Association : ‘Interface between data terminal equipment and data communication equipment employing serial binary data interchange’ (EIA Standard RS-232, Washington, DC, 1969)
8 MESAROVIC, M.D., MACKO, D., TAKAHARA, Y.: ‘Theory of hierarchical multilevel systems’ (Academic Press, 1970)
9 KASSEM, M.: ‘Fire alarm systems’, MSc. thesis, Dept. of Elec. & Comp. Eng., Concordia University, Montreal, Canada, 1985
10 LIE, P., and KOTAMARTI, U.: ‘The design of a fire alarm system using microprocessors’, C481 Project, Dept. of Elec. and Comp. Eng., Concordia University, Montreal, Canada, 1986
湖北理工学院 毕业设计(论文)外文文献翻译
译 文
基于单片机的火灾探测和监控系统
A.J. AI-Khalili, MSc, PhD D. AI-Khalili, MSc, PhD M.S. Khassem, MSc
关键词：危险，设计，设备状态监测
摘要：火灾探测及报警监控已成为一个复杂而完整的体系。该系统采用多
个单芯片架构到一条主线上。该控制算法是基于两级决策层次，因此分配了复杂性。一个完整的电路原理图，给出了主、分控制器所需的软件的结构要求。设计延续一般形式，这样可以适应于多种系统的配置。尤其显示出新的技术发展，特别是CMOS单芯片器件，在系统设计中的使用，以减少整体硬件的复杂性，例如，通过分解系统，这样的层次较低水平的控制器能够有一些决策自主权，用简单的分布式的方法解决了复杂的决策。
1、引言
大多数高风险地区和建筑物的管理要求安装火灾探测报警系统。多数国家消防规范的要求监测和控制具体的是危险场合或建筑物，如化工厂，石油类，核电厂，住宅高楼等这些场合的一般性质可以指定为下列要求 ：
（一） 所有探测器信号源信号能被主处理器准确识别。 （二）主从控制器有另外的沟通路径。 （三）检测报警和主控制设备由控制中心控制。 （四）火灾现场和控制中心的通讯。 （五）提供的应急电源。
它也被用来应对特殊情况和进行深被检测。
火灾探测及报警系统是一个旨在信号 ， 在一旦发生火警报警装置的组合。 该系统也可实现风扇控制，防火门关闭或释放，电梯锁定，应急照明控制和其他