【正文】 presents a streetlamp controller based on Siemens S7200 series programmable controller (PLC). The system with S7200 as the core realizes the automatic work of the streetlamp controller. What is more, the system can automatically choose three work moodslight control, wetlands control and the timely control by detecting the environment through the photoelectric sensor and humidity sensor, and then achieve the intelligent control of the street lamp. The design of the sensor using the photoelectric sensor and humidity sensor, with functional and high accuracy， fast response, small size, very lowpower, low price. It can examine whether the light is strong or not through the photoelectric sensor and accordingly adjust the time of lighting street lamps. The humidity sensors can change the time of street light by detecting the environmental humidity, and change the voltage size. The control system of the street lamp based on PLC is of high credibility, strong operability, continuous expansion, obviously efficient energy conservation and low costs and maintenance expenditure. It is easy to change the control system by changing programs to apply to different regions with time difference and bees the development trend of street lamp design. Key words: PLC， Photoelectric sensor， Humidity sensor， street lamp目 錄 III 目 錄 摘 要 ............................................................................................................................ I ABSTRACT(英文摘要 ) ................................................................................................II 目 錄 ........................................................................................................................... III 第一章 引 言 ........................................................................................................... 1 課題的目的意義 .................................................................................................... 1 路燈控制技術(shù)的研究現(xiàn)狀 .................................................................................... 1 設(shè)計方案的可行性分析與論證 ............................................................................ 2 設(shè)計主要技術(shù)指標(biāo)與參數(shù) .......................................................................... 2 設(shè)計方案的可行性論證 .............................................................................. 3 第二章 傳感器 ........................................................................................................... 6 光電式傳感器 ........................................................................................................ 6 光電式傳感器介紹 ...................................................................................... 6 路燈亮度檢測 .............................................................................................. 9 濕度傳感器 ............................................................................................................ 9 濕敏傳感器介紹 .......................................................................................... 9 集成濕度傳感器介紹及選型 .................................................................... 10 第三章 可編程控制器概述 ..................................................................................... 15 PLC 的定義 ........................................................................................................... 15 PLC 的發(fā)展 ........................................................................................................... 15 我國 PLC 的發(fā)展 ....................................................................................... 16 PLC 的系統(tǒng)組成與工作原理 ............................................................................ 17 PLC 的組成結(jié)構(gòu) ......................................................................................... 17 PLC 的掃描工作原理 .............................................................................. 17 PLC 的發(fā)展趨勢 ................................................................................................... 18 第四章 系統(tǒng)的硬件方案與設(shè)計 ............................................................................... 19 PLC 的選型與模塊配置 .................................................................................... 19 PLC 的選型原則 ......................................................................................... 19 本系統(tǒng)中可編程序控制器的選取及其特 點(diǎn) ............................................ 20 編程元件的 I/O 地址分配 .................................................................................... 24 目 錄 IV 硬件接線圖 .......................................................................................................... 25 第五章 系統(tǒng)的軟件設(shè)計 ......................................................................................... 27 軟件設(shè)計概述 ....................................................................................................... 27 PLC 軟件設(shè)計的主要步驟 ......................................................................... 27 系統(tǒng)主程序 ................................................................................................. 28 實時時鐘指令 ............................................................................................. 29 程序清單 ............................................................................................................... 29 結(jié) 論 ......................................................................................................................... 30 參考文獻(xiàn) ..................................................................................................................... 31 致 謝 ................................................................................................