The Research Of Wireless Sensor Networks For Environmental Monitoring Applied In Vegetable Greenhouses

Big sheds of modern agriculture vegetable are expanding by leaps and bounds, not only cultivate the breed is more, scale the area bigger, and cultivate also further concentrates , this gives agriculture personnel's administration and optimization to cultivate having increased degree of difficulty and cost. That big vegetable sheds for problem , our country resolving these are cultivated is developing to informationize and intellectualized direction. Only have the means applying lower advanced cost information collect, real time, gain big shed environment information accurately , work out the science administrative decision, the at last passes measure such as intelligence equipment or manpower under the control of , ability improves the economic effect cultivating a crop's.On the main body of a book being in going deep into the basis studying the wireless sensor is network, the various specification cultivating an environment combining with big sheds of vegetable , the environmental monitoring system having designed and realizing big sheds of because of wireless network sensor vegetable. Make use of the wireless sensor network to be in progress to shed inner crop growth condition monitor, collect the person depending on the growth period inner temperature , humidity and illumination the intensity data, cultivate so that the environment reaches proper crops growth condition , the optimization realizing big sheds of vegetable within being able to adjust a shed in time.The environment having monitored a node having assumed detailed go into , having designed big sheds of vegetable according to big sheds of vegetable characteristic to wireless sensor monitors the main body of a book systematically. System adopt the comparatively high low nature price energy consumption AT90S8515 chip to be tiny the chip CC1100 key element controlling core and wireless radio frequency as wireless data transmission, and the intensity sensing circuit having designed the temperature , humidity , illumination according to the need applying. Article systematically expounded the wireless sensor nodes to monitor the hardware circuit design, the preparation of data acquisition module and data transmission modules, and based on clusters spanning tree algorithm in S-MAC protocol based on the MAC protocol, a new Z-MAC agreement, through the system simulation of its energy consumption, latency, and scalability are analyzed to verify this protocol in vegetable greenhouses in the applicability of environmental monitoring systems.Place of the problem has depended on the environmental monitoring applying wireless sensor network technology having arrived at big sheds of vegetable is middle , has structured wireless supervisory control system thereby. Demonstration, gives first place to AT90S8515 work charging a chip's monitoring a node have volume is small , power dissipation low grade merit, and price are low , very beneficial to being extended. The Z-MAC agreement that the most important being , system improve on already some S-MAC agreements basis, has been have decreased by the energy consumption monitoring a node much better in application , have improved time lapse and augmentability.