中英文智能樓宇自動化系統(tǒng)方案-文庫吧資料
2025-05-02 05:03本頁面
【正文】 Analog input channels from the transmitter, the sampling switch, amplifier, A / D converter and interface circuit. One is the role of the transmitter signal will be converted into the standard nonpower electrical signal，Can be temperature, pressure, flow transformed into 010mA or 420mA DC signal, it is through the A / D converter to achieve. Digital input channels from the switch contacts, photoelectric coupler and interface circuit, reflecting the production process on / off state of the contact signal, through the optocoupler and the interface circuit transformation into a digital signal sent to the puterDirect mitment to the process control puter operations and control tasks, first of all input channels through the process of collecting the parameters of the object and signals, then the scheduled control law (such as PID) for operation, and then send control signals to the controlled object, then the output channel direct control of the control valve actuatorProcess output channel from the analog output and digital output of two parts. The former control of the puter output of digital signals into analog voltage or current signals, through the amplifier to drive the actuator control valve to achieve control of the production process. This part of the interface circuit, D / A converter, amplifier and actuator ponent. Which the puter output of the switch signal by amplifier to drive solenoid valve and relay actuator, which consists of electrical interfaces, optical coupler, amplifier and actuator ponent。本論文未全部顯示，總約有21435字，查看全文Abstract: This paper describes the building automation system ponents, functions, and principles of software and hardware technology, history, and related products are briefly introduced the reader of this system has a prehensive understanding of relevant professional designers for the program designed to provide a theoretical frame of reference. Keywords: building automation system, the core principle of the basic functions of hardware and software technologies1 Introduction to Building Automation System, also known as building automation system (BuildingAutomationSystem referred to as BAS), is an integral part of intelligent building, its task is the building39。Intelligent Building Theory of Building Automation System。5MS／TP是一種主／從令牌傳遞數(shù)據(jù)鏈路層技術(shù)，允許使用EIA485硬件。組成建筑設(shè)備自動化系統(tǒng)，必須有一種大家都能接受并且共同遵守的工作語言來實現(xiàn)相互之間的對話，這就是數(shù)據(jù)通信協(xié)議標(biāo)準(zhǔn)。建筑設(shè)備自動化系統(tǒng)常用的有總線網(wǎng)和環(huán)網(wǎng)，在兩種結(jié)構(gòu)中任意兩節(jié)點通信可直接通過網(wǎng)絡(luò)進行，各節(jié)點處于平等地位。③對環(huán)境適應(yīng)性強。如：控制站采用雙CPU板，雙I／0板等。(1)控制網(wǎng)絡(luò)特點分布式控制系統(tǒng)的數(shù)據(jù)通信網(wǎng)絡(luò)數(shù)據(jù)通信網(wǎng)絡(luò)是分布式控制系統(tǒng)的支柱。其基本結(jié)構(gòu)功能如圖3所示，圖中現(xiàn)場控制站、數(shù)據(jù)采集站、工程師站、操作員站、監(jiān)控計算機和管理計算機通過數(shù)據(jù)通信網(wǎng)絡(luò)被有機地結(jié)合起來，組成分級分布控制系統(tǒng)。Systems簡稱DCS)20世紀(jì)于70年代中期出現(xiàn)并迅速發(fā)展起來，它將計算機技術(shù)、控制技術(shù)、圖形顯示技術(shù)和通信技術(shù)匯集于一體，可對分散在現(xiàn)場的設(shè)備進行控制，又可方便地集中管理、操作，與以往的控制系統(tǒng)相比，既避免了單臺計算機集中控制的不足，又克服了常規(guī)儀表人機交互困難的缺點。分布式控制系統(tǒng)的體系結(jié)構(gòu)分布式控制系統(tǒng)(Distributed設(shè)了為采樣周期(與系統(tǒng)時間常數(shù)相比，T足夠小)，k為采樣序號(k=0，1，2，……)，可用矩形法計算而積以差分代替微分式中e(k)——第k次采樣所得偏差值e(k1)——第(k1)次采樣所得偏差值u(k)——第k時刻的控制量上式中的采樣周期T越小(與系統(tǒng)時間常數(shù)比較而言)，則被控過程與連續(xù)控制過程越接近，又稱為“準(zhǔn)連續(xù)控制”。數(shù)字PID控制算法，模擬量調(diào)節(jié)器的理想PID算式為直接數(shù)字控制系統(tǒng)的基本算法按照偏差的比例(P)、積分(I)和微分(D
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