The Wireless Monitoring System Of Greenhouse Based On MF-TDMA

Greenhouse cultivation is an important way of modern agricultural production and the real-time monitoring technology of its environment is an important technique of modern agriculture. Signal transmission of traditional wired monitoring system is relatively stable, but due to its complicated wiring, cable easy to corrode,rewiring for crop changes and other unfavorable factors, it causes the wired monitoring system generally high cost and bloates system complexly. And those are the reasons that do not increasingly satisfy the rapid development in greenhouse cultivation.Compared to the above disadvantages of wired monitoring system, wireless sensor network monitoring system which is portable, safe, reliable, low power consumption, low construction cost and many other advantages in modern agricultural production, is widely popular, it will completely replace traditional wired monitoring.This thesis is written about a wireless network monitoring system in greenhouse based on the communication mechanism of MF-TDMA. Each node transmits data based on MF-TDMA communication mechanism, consisting of a small WSN(Wireless Sensor Network).The wireless monitoring system of greenhouse is presented in this paper by combining the hardware design, software protocol procedures to achieve real-time monitoring of temperature, humidity and light intensity in greenhouse. The greenhouse of which lenghth is about30m and of which width is about10m distributes5collection nodes of which the distances to the gateway nodes in the control room ranging from25m to30m.The function of this wireless network monitoring system in greenhouse is to stably,longly and timely transmit data from which are collected by sensor nodes and about temperature, humidity and light intensity of greenhouse to gateway node which connects to PC of which software finally stores and processes those data.Indicated through the experiment in the actual production process:wireless sensor nodes based on MF-TDMA communication mechanism, can monitor the greenhouse environment with stability, high efficient and low energy consumption.