Indoor Environment Measurement System Based On Wireless Sensor Network

The quality of the living environment affect directly the quality of life, therefore, the research based on indoor environment evaluation system of wireless sensor networks has very important significance to improve the comfort of home and raise the level of living.The research, based on the wireless sensor networks, embedded virtual instrument technology, achieve multi-node collection of indoor parameters, such as temperature,humidity, light intensity, sound and formaldehyde concentration, After the analysis and processing of the data by the embedded processer, and process and combine thermal environment, light environment, acoustic environment, formaldehyde concentration environment to evaluate comfort level of indoor environment so as to improve the living environment timely. In this paper, an indoor environment comfort evaluation system is proposed, which is based on the evaluation system, and it is of great practical significance to develop the indoor environment assessment system.Firstly, the hardware system of the data acquisition system is built. Secondly, the software programming of the virtual instrument is studied. The hardware system is built on the platform of embedded STM32 controller, the system uses the network communication module, by the uIP communication protocol, the system can realize the indoor environment parameter detection of each point, and can display the data through TFT-LCD in real time.This paper presents the major components of indoor environment evaluation system, the system's slave machine includes a sensor parameter acquisition modules, embedded system modules, network interface module, PC including data processing, real-time curve display of environmental parameters, the quality of comfort and so on. This paper studies the UCOS-II features and takes it to migrate the embedded STM32 processor, designs for each hardware module, redacts corresponding application and achieves communication and task scheduling between pc and slave machine. System has conducted the whole debugging, the final result of the system design and debugging show that: the system to achieve the desired wireless communication, sensor environmental parameters acquisition, real-time monitoring of environmental parameters and comfort evaluation comfort level and has a good scalability,reliability resistance.