네트워크를 이용한 온실 감시 시스템의 개발 = Facilities for Bio-production and Environmental Engineering : Development of a Greenhouse Monitoring System Using Network

다국어 초록 (Multilingual Abstract)

this study was carried out to design, construct, and test a greenhouse monitoring system for the environment and status of control devices in a greenhouse from a remote site using internet. The measuring items selected out of many environmental factors were temperature, humidity, solar radiation, CO_2, SO_x, NO_x concentration, EC, pH of nutrient solution, the state of control devices, and the image of greenhouse. The network system consists of the three kinds of monitors named the Group Monitor and the Server Monitor and the Server Monitor. The results of the study are summarized as follows. 1.The measuring module named the House Monitor, which is used to watch the state of the control device and the environment of the greenhouse, was developed to a embedded monitoring module using one chip microprocessor. 2.For all measuring items, the House Monitor showed a satisfactory accuracy within the range of ±0.3%FS. The House Monitors were connected to the Group Monitor by communication method of RS-485 type and could operate under power and communication fault condition within 10 hours. The Group Monitor was developed to receive and display measurement data received from the House and to control the greenhouse environmental devices. 3.The image of the plants inside greenhouse were captured by PC camera and sent to the Group Monitor. the greenhouse manager was able to monitor the growth state of plants inside greenhouse without visiting individual greenhouse. 4.Remote monitoring the greenhouse environment and status of control devices was implemented in a client/server environment. The client monitor of the greenhouse manager at a remote site or other greenhouse manager was able to monitor the greenhouse environment and the state of control devices from the Server Monitor using internet.