作物生長需要一個適宜的環(huán)境，在可控環(huán)境下，可以不分季節(jié)、不分地區(qū)地種植所需的作物。控制系統(tǒng)為實現(xiàn)這一目標提供了基礎。控制系統(tǒng)設計采用主從模式，基于RS-485 總線協(xié)議，設計全數(shù)字化傳感器和測控輸入輸出模塊；采用COM 組件技術設計應用軟件的數(shù)據(jù)采集、控制算法和控制輸出組件。整個系統(tǒng)經(jīng)過測試和運行，證明滿足可控環(huán)境調(diào)控要求。
關鍵詞：現(xiàn)場總線，分布式系統(tǒng)，COM 組件，可控環(huán)境，智能節(jié)點

Abstract: The crop growth requires a favorable environment. Crops can be grown at different districts, and different seasons in controlled environments. In order to realize this goal, a new control system based on RS-485 bus is designed in the light of the master/slave mode. The design method of intelligent sensors and I/O modules is given, and the program methodology using COM component techniques is described in developing application software with data collection, control algorithm and control output modules. The system passes testing and the
operation shows designed control system can be true of controlled environments.
Key words: field bus , distributed system, COM component, controlled environment, intelligent node