The Design Of The Data Acquisition Terminal Of Temperature And Humidity In The Greenhouse Of Yanling Yellow Peach

The sugar degree of yellow peaches can be greatly influenced by the weanther before theri maturity for a period of time. If it rains continuously, not only the sugar degree reduce, but also the peaches are easy to rot. However, if they can be planted in canopy cover, yellow peaches can be protected from the influence of the continuous rainfall, then their sugar degree can be ensured, the rot can be avoided, and the quality can be raised. The cultivation of Yanling yellow peach in the greenhouse can also aim at extend the period of selling them. The research and design can directly serve agriculture and farmers, and also the agriculture meteorological department. Therefore, the research on the technology of cultivating Yanling yellow peaches in the greenhouse has certain economic and social benefits. In order to achieve the purpose of high quality, high yield of Yanling yellow peaches, temperature, and humidity data must be monitored. Based on the embedded operating system FreeRTOS, combined with the growth regularity of Yanling yellow peaches, the design realize the control of the greenhouse environment.This thesis first elaborats the status and dynamic development of the environmental parameters of greenhouse control system at home and abroad, analyzes the feasibility of acquisition system of the temperature and humidity data in the greenhouse of Yanling yellow peaches, and presents the realization scheme of the system. Combined with the embedded operating system FreeRTOS and embedded microprocessor LPC1114, the thesis designs the data acquisition terminal of the temperature and humidity for the greenhouse of the Yanling yellow peaches, and focuses on the research of FreeRTOS LPC1114in the transplant technology. From the performance, reliability, cost and other aspects of selected FreeRTOS ultra kernel operating system, the thesis gives a detailed analysis of the critical principles of the FreeRTOS task creation, task delay operating system, completes the transplantation of FreeRTOS, and obtains parts of the software codes of the key techenology.On the basis of the project analysis, the thesis designs the hardware circuit and software program of the system. The hardware circuit design mainly includes the interface circuit and a liquid crystal display circuit design of embedded processor LPC1114and sensor. The program mainly includes the driver program design and software design of LCD1602temperature and humidity sensor DHT11display based on FreeRTOS.Temperature and humidity data acquisition terminal is designed in the thesis, and it has the characteristics of low cost, high reliability and real-time.