【正文】 M, IO Ports both serial and parallel, A/D timer, flags and other functions on chip. At the system level, the new chips make new architectures possible. The objective of this paper is to show how technology can influence system architecture in the field of fire control. The new high density single chip microcontrollers are incorporated in the design of a large scale system and yet we obtain a smaller system with a better performance. In terms of fire detection and alarm monitoring, this is reflected directly in the local station hardware, because of their remoteness and power supply requirements. A plete local station can be designed around a single CMOS chip with power consumption of a few m W depending on system operation. This approach reduces the cost and plexity of design, implementation and maintenance and provides easily expandable and portable design. This implementation was not possible with old technology. Most of fire detection/monitoring systems available are tailored towards a specific application and lack the use of recent advances in CMOS VLSI technology. In this study, we develop a fire detection/monitoring system which is general in concept, readily implementable in a multitude of applications for early detection of a fire before it bees critical, for equipment and evacuation of personnel. Here, we propose a central control and distributed control/detection/monitoring with adequate munication, where use is made of singlechip microcontrollers in the local stations, thus improving controllability and observability of the monitoring process. 2 Detection and alarm devices A basic fire detection system consists of two parts, detection and annunciation. An automatic detection device, such as a heat, smoke or flame detector, ultraviolet or infrared detectors or flame flicker, is based on detecting the byproduct of a bustion. Smoke detectors, of both ionization and optical types, are the most monly used detector devices. When a typical detector of this type enters the alarm state its current consumption increases from the pA to the mA range (say, from a mere 15pA in the dormant mode to 60 mA) in the active mode. Inmany detectors the detector output voltage is well defined under various operating conditions, such as those given in Table 1. The more sensitive the detector, the more susceptible it is to false alarms. In order to control the detector precisely, either of the following methods is used: a coincidence technique can be built into the detector, or a filtering technique such that a logic circuit bees active only if x alarms are detected within a time period T. The detection technique depends greatly on the location and plant being protected。該系統(tǒng)采用多個單芯片架構(gòu)到一條主線上。 （三）檢測報警和主控制設(shè)備由控制中心控制。 當(dāng)技術(shù)的變革，該架構(gòu)必須修訂，以利用這些新的功能變化。新的高密度的單芯片微控制器納入一個大系統(tǒng)的設(shè)計，但我們可以得到了更好的性能，更小的系統(tǒng)。 檢測和報警裝置 一個基本的火災(zāi)探測系統(tǒng)由兩部分組成，檢測和報警。一般來說，生命和財產(chǎn)保護有不同的做法。 1，其中第 1 級是中央控制站，是微機最終（在不手動模式）決策者。這種方法保留了層次的準確監(jiān)測檢測和嚴格的規(guī)則高風(fēng)險的核電站警報系統(tǒng)。 圖 .3 是驅(qū)動電路必須得一個擴展總線。 分控制站 分控制站的決定可以控制處理當(dāng)?shù)氐男畔ⅰ? 這個選擇是摩托羅拉 68HC11A4，理由如下 ： （ 1）它是 CMOS 技術(shù)，這可減少電力消耗。 主循環(huán) 結(jié)論 本文描述了一個大規(guī)模的火災(zāi)探測及報警系統(tǒng)，使用多的發(fā)展，單芯片微型計算機。 本地基站控制器的設(shè)計采用了 MC68705R3 單片機。 中央控制站的控制部分是基于 MC 68000 微處理器（墨西哥 68KECB 摩托羅拉），它有一個內(nèi)置的顯示器稱為導(dǎo)師。 回路 電源，通常在 26 到 28V之間，通常五伏一百毫安單片低功耗電壓調(diào)節(jié)器供電的微控制器。這是最主要的原因，以前這種做法是不可行的。 （四）， 它提供了中央和分站的系統(tǒng)測試點。在重要環(huán)境下，可靠性是極其重要的。信息傳遞的地位始終是單向及以上。 交互各級之間發(fā)生了向上的信息傳輸有關(guān)的子系統(tǒng)和向下狀態(tài)轉(zhuǎn)移的命令。為了控制探測器的精確，可使用下列方法：過濾 技術(shù)，這樣的邏輯電路成為活躍僅當(dāng) x警報的時間內(nèi)檢測周期 T。在這項研究中，我們開發(fā)了火災(zāi)檢測 /監(jiān)測系統(tǒng)，常規(guī)設(shè)計，易于執(zhí)行的早期發(fā)現(xiàn)火警。在系統(tǒng)級，新的芯片做出新的結(jié)構(gòu)成為可能。這些額外的功能補充由檢測和報警裝置和中央控制單元組成。多數(shù)國家消防規(guī)范的要求監(jiān)測和控制具體的是危險場合或建筑物，如化工廠，石油類，核電廠，住宅高樓等這些場合的一般性質(zhì)可以指定為下列要求 ： （一） 所有探測器信號源信號能被主 處理器準確識別。 this satisfied all our memory and 1/0 requirements at the local station side. 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