【正文】 stem 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 builtin 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, singlechip microcontroller. 7 References 1 ‘Fire protection guidelines for nuclear power plants’, US NRC Regulatory Guide 2 BAGCHI, .: ‘A multilevel distributed microprocessor system for a nuclear power plant fire protection system controls, monitoring, and munication’, IEEE Trans., 1982 3 PUCILL, .: ‘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. 353363 4 HEAVISID, L.: ‘Offshore fire and explosion detection and fixed fire’. Offshore Technological Conference, 12th Annual Proceedings, Houston, Texas, May 1980, pp. 509522 5 CELLENTANI, ., and HUMPHREY, .: ‘Coordinated detection/munication 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 munication equipment employing serial binary data interchange’ (EIA Standard RS232, Washington, DC, 1969) 8 MESAROVIC, ., MACKO, D., TAKAHARA, Y.: ‘Theory of hierarchical multilevel systems’ (Academic Press, 1970) 9 KASSEM, M.: ‘Fire alarm systems’, MSc. thesis, Dept. of Elec. amp。 this facilitates serial munication. (e) It has an a/d converter on board。 the central or the top level provides the lower units with a model of the relationship between its action and the response of the system. It is evident that a powerful machine is required at this stage so that all the required functions can be implemented. The availability of the new generation of microchips makes this architecture a feasible solution. A single chip microputer was chosen over discrete digital and analogue devices to interface to the field devices and to the central microputer. This is the main reason that previously this approach was not feasible. In selecting the microputer for the local stations, the criterion was the requirement for a chip which contains the most integration of the analogue and digital ports required for the interface and the utilization of CMOS technology owing to remoteness of the local stations. The choice was the Motorola 68HC11A4, for the following reasons: (a) It is CMOS technology。 火災(zāi)報(bào)警器 中英文資料外文翻譯文獻(xiàn) Multiple singlechip microputer approach to fire detection and monitoring system . AIKhalili, MSc, PhD D. AIKhalili, MSc, PhD . Khassem, MSc Indexing term : Hazards, Design, Plant condition monitoring Abstract: A plete system for fire detection and alarm monitoring has been proposed for plex plants. The system uses multiple single chip architecture attached to a party line. The control algorithm is based on a twolevel hierarchy of decision making, thus the plexity is distributed. A plete circuit diagram is given for the local and the central station with requirements for the software structure. The design is kept in general form such that it can be adapted to a multitude of plant configurations. It is particularly shown how new developments in technology, especially CMOS single chip devices, are incorporated in the system design to reduce the plexity of the overall hardware, . by deposing the system such that lower levels of hierarchy are able to have some autonomy in decision making, and thus a more plex decision is solved in a simple distributed method. 1 Introduction Regulatory requirements for most high risk plants and buildings mandate the installation