Greenhouse wireless sensing intelligent control system based on ZigBee protocol
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An intelligent control system based on the ZigBee protocol establishes a wireless sensor network structure and perception environment for greenhouse plant growth; in a specific artificial greenhouse environment, it is conducive to the growth of sample plants (roses, chrysanthemums).
1) According to the characteristics of climate and ecological environment, establish a wireless sensor network structure and perception environment for greenhouse plant growth
① 10 nodes of illuminance, temperature and humidity sensors; a set of base station and background management software.
②The light intensity inside the greenhouse is adjustable between 300-25000 Lux; the light source spectrum is mainly red light spectrum (wavelength 625-635mm), blue light spectrum (wavelength 465-475mm) and orange light spectrum between the two ( Wavelength 600-610mm); the effective use of the greenhouse space is uniformly covered by the light energy field, and the light intensity error at random points is less than 10% of the ideal value.
③The air temperature inside the greenhouse is adjustable from 18 to 40°C, the minimum accuracy is 0.5°C, the error is 2.5°C; the air humidity is controlled within 10%RH to 100%RH, the accuracy is 3%RH, the error is <10%RH; greenhouse air The temperature and humidity maintain dynamic balance, and the fluctuation range of overshoot is less than 10%. ④Keep the soil humidity adjustable from 10%RH to 70%RH, with an accuracy of 5%RH, and an error of <15%RH; overcome the large inertia and large lag of soil humidity changes, and the fluctuation range of overshoot is less than 10%. ⑤The real-time monitoring error is less than 0.1S; the accuracy rate of monitoring information and command sending and receiving is greater than 99.5%; the remote wireless monitoring distance is greater than 200m. 2) Study on the growth characteristics of sample plants (roses, chrysanthemums) in a specific artificial greenhouse environment ①The light intensity field characteristic model and light intensity control algorithm that meet the growth characteristics of the test sample plants in the greenhouse environment. ②Environmental temperature, humidity field and soil humidity field models and related control algorithms in the greenhouse environment that meet the requirements of the plant growth characteristics of the test samples. 3) The actual application system has been developed
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