plc交通信號燈的控制設(shè)計(jì) 畢業(yè)論文

1、 PLC 交通燈畢業(yè)論文 交通燈畢業(yè)論文摘 要隨著城市機(jī)動車量的不斷增加，自 80 年代后期,許多大城市如北京、上海、南京等出現(xiàn)了交通超負(fù)荷運(yùn)行的情況。傳統(tǒng)的交通信號燈控制一般采用電子線路和繼電器實(shí)現(xiàn)，結(jié)構(gòu)復(fù)雜，可靠性低，故障率高,較難實(shí)現(xiàn)功能的變更。而可編程控制器(PLC)以微處理器為核心，具有可靠性高，控制功能強(qiáng)，使用靈活方便等優(yōu)點(diǎn)。特別是由 PLC 實(shí)現(xiàn)的控制系統(tǒng)，普遍采用依據(jù)繼電接觸器控制系統(tǒng)電氣原理圖編制的梯形圖

2、語言進(jìn)行程序設(shè)計(jì)，結(jié)構(gòu)簡單，抗干擾能力強(qiáng)，運(yùn)行穩(wěn)定可靠，可方便地設(shè)置定時時問，編程容易，功能擴(kuò)展方便，修改靈活等，并且有完善的自診斷和顯示功能，維修工作極為簡單。本文就是基于可變成控制通過調(diào)試完成對交通信號燈的控制設(shè)計(jì)。關(guān)鍵詞 關(guān)鍵詞：可編程控制器；交通燈；設(shè)計(jì)；AbstractWith the increasing amount of urban automobiles, since the 80 s, many big cities

3、 such as Beijing, Shanghai, nanjing and other appeared traffic overload running. The traditional traffic light control general use of the electronic circuits and relay to realize the complex structure, reliability, low

4、 failure rate high, are difficult to achieve the change of function. And programmable controller (PLC) to microprocessor as the core, with high reliability, control function is strong, flexible and convenient use, etc.

5、 Especially the PLC control system, the widespread use of the relay contact device control system based on electrical diagram of ladder diagram language program design, simple structure, strong anti-jamming capability,

6、stable operation, can easily set timing of time, programming easy, function expansion is convenient, modify, and have a perfect flexible the diagnosis and display function, repair work is extremely simple. This paper i