中英文智能樓宇自動化系統(tǒng)方案(編輯修改稿)
2025-05-23 05:03 本頁面
【文章內(nèi)容簡介】 Management: including device files, equipment operation and equipment maintenance management reports. 3, the principle of building automation control systemBuilding control system used is based on modern control theory, distributed puter control system, also known as distributed control system (Distributedcontrol systems referred to as DCS). It is characterized by a centralized management decentralized control, that is charged with distribution of equipment in the field office of the microputer control (DDC) to plete device charged with the task of realtime detection and control, centralized control of puter to overe the risks of high lack of centralized control and conventional single instrument in the central control room of the central management puter with CRT display, print output, extensive software management and a strong digital munications capabilities to plete the centralized operation, display, alarm, tasks such as printing and optimal control, avoiding Changgui instrument control is distributed difficulties after the manmachine contact, no unified management shortings, ensure that equipment running in top form.Here are distributed control systems with several concepts. direct digital control system (DDC) direct digital control system (Direct Digital Control referred to as DDC) shown in Figure 2. Computer through the analog input channels (AI) and digital input channels (DI) realtime data collection, and then calculated according to certain rules, and finally the control signals, and through the analog output channels (AO) and the switch output channel (DO ) direct control of the production process. So DDC system is a closed loop control system, a puter in the industrial production of the most popular way of an applicationDDC system control puter to undertake tasks, which required realtime, high reliability and adaptability. Composition of direct digital control systemDirect digital control system consists of the process input channel, process control puter, the process of output channels of three parts. Process input channels from the analog input and digital input of two parts. 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 t
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