Research Of Integrate Physiological Parameter In Greenhouse Monitor System Based On WebAccess

Acquisition of crop physiological parameters accurately can be timely understanding the status of crops, and provide reference for optimal control of greenhouse environment. Thus, this paper designed a remote control system that integrate physiological parameters for greenhouse by combing network technology, configuration software technology and embedded technology. A wireless data acquisition node developed based on STC12 MCU was used to collect temperature, humidity, light intensity, carbon dioxide and other common environment parameters; Sap flow velocity and leaf-temperature was collected by programmable collector DT80. MCU STM32 was used to repackage data that from acquisition node and DT80, then send it to the PC software after repackage. The PC software was applied as a sever that can realize human computer interaction, management the equipment and data record. At the same time, the system has the function of remote video monitoring and record sereen. Experiments show that the system worked well in the test time of ten months, and all the data of environment parameter, crop physiologic, the state of the equipment were preserved during testing time. The results show that the system has high reliability, and can provide references for the final development of the monitoring system for greenhouse.The main works were as followed:1. The design of wireless data acquisition node of greenhouse environment. A data acquisition node designed based on STC12C5A60S2 was used to collect temperature, humidity, light intensity, TBQ, carbon dioxide and soil moisture. Each node has eight port, a temperature and humidity of SHT1X, six 0-5V voltage signal, and realized wireless communication by expansion of radio frequency modules on serial port.2. The design of crop physiological parameters acquisition system. A stem SGB9-WS packaged sensor was used collected the flow rate and the 81M/LT-1M sensors was used to collected the leaf temperature. The programmable collect DT80 was used to handle the sensor output signal and transmitted collect data to STM32 controller through serial port.3. The design of field control system. The field control system that developed based on MCU STM32 was used to receive environment data that from data acquisition node and DT80, then repackage it and send to the PC software or the LED display. A keyboard and an relay output module that expansion on the I/O port were used to drive the equipment of greenhouse environment. A pyroelectric infrared module was used to management the LED display automatically.4. The design of video monitoring system based on web. A digital video signal was produced by the analog camera and video acquisition card. And a remote video monitoring system was achieved by using webpage development technology to embedded the video plug-in into webpage.5. The design of PC software. The PC software was developed based on configuration software WebAccess, including design of Human-Machine Interface, configuration of serial communication, design of data management and storage system. Real-time monitoring and on-line equipment management of greenhouse through IE browser was achieved by building an IIS server. Thin client interface was specially developed for mobile devices. With the help of JPEG capture and address automatically mapping technology, mobile device can achieve real-time monitoring through the thin client interface.