PLC自動化冷庫設計,plc,自動化,冷庫,設計 摘要 在基礎學科研究中，傳感器更具有突出的地位?，F代科學技術的發(fā)展，進入了許多新領域：例如在宏觀上要觀察上千光年的茫茫宇宙，微觀上要觀察小到 cm的粒子世界，縱向上要觀察長達數十萬年的天體演化，短到 s的瞬間反應。此外，還出現了對深化物質認識、開拓新能源、新材料等具有重要作用的各種極端技術研究，如超高溫、超低溫、超高壓、超高真空、超強磁場、超弱磁碭等等。顯然，要獲取大量人類感官無法直接獲取的信息，沒有相適應的傳感器是不可能的。許多基礎科學研究的障礙，首先就在于對象信息的獲取存在困難，而一些新機理和高靈敏度的檢測傳感器的出現，往往會導致該領域內的突破。一些傳感器的發(fā)展，往往是一些邊緣學科開發(fā)的先驅。 PC 是一個數字式的電子裝置，它使用了可編程序的記憶體儲存指令。用來執(zhí)行諸如邏輯，順序，計時，計數與演算等功能，并通過數字或類似的輸入/輸出模塊，以控制各種機械或工作程序。一部數字電子計算機若是從事執(zhí)行PC 之功能著，亦被視為PC，但不包括鼓式或類似的機械式順序控制器。 可編程控制器是一種數字運算操作的電子系統(tǒng)，專為在工業(yè)環(huán)境應用而設計的。它采用一類可編程的存儲器，用于其內部存儲程序，執(zhí)行邏輯運算，順序控制，定時，計數與算術操作等面向用戶的指令，并通過數字或模擬式輸入/輸出控制各種類型的機械或生產過程。可編程控制器及其有關外部設備，都按易于與工業(yè)控制系統(tǒng)聯成一個整體，易于擴充其功能的原則設計。 關鍵詞：傳感器 可編程控制器 Abstract In the basic subject research, the sensor has the prominent status. The modern science technology's development, entered many new domains: For example must observe over a thousand light years macroscopically the boundless universes, microscopically must observe slightly to the cm granule world, on longitudinal must observe is hundreds of thousands of year heavenly body evolution, short to s instantaneous response. In addition, but also appeared to deepened the material to know that developed the new energy, the new material and so on to have the influential role each kind of violent engineering research, like superhigh temperature, ultralow temperature, ultrahigh voltage, ultrahigh vacuum, megagauss field, ultra weak magnetism dang and so on. Obviously, must gain the information which the massive human sense organ is unable to gain directly, has not adapted the sensor is impossible. Many basic science research's barrier, first lies in the object information the gain existence difficulty, but some new mechanisms and the high sensitivity examination sensor's appearance, will often cause in this domain the breakthrough. Some sensor's development, often is some edge discipline development pioneer. PC is a number character style electronic installation, it has used the programmable memory save instruction. Uses for to carry out such as logic, in turn, the time, functions and so on counting and calculation, and through digital either the similar input/output module, control each kind of machinery or the working routine. If a digital computer is engaged in carries out function of the PC, also regards as PC, but not including drum type or similar mechanical type sequence controller. The programmable controller is one kind of digital operation operation electronic system, for designs specially in the industry environment application. It uses a kind of programmable memory, uses in its internally stored program, the actuating logic operation, the sequential control, fixed time, counting and arithmetic operation and so on face user's instruction, and through digital either simulation type input/output control each type machinery or production process. The programmable controller and the related external instrumentation, press connect a whole easy with the industrial control system, easy to expand its function the principle design. Key word: Sensor PLC