Research And Realization On The Wireless Sensor

Wireless sensor technology is a new technology which integrate different ones. It includes sensor technology, embedded sampling technology and wireless communication one. This technology makes remote monitor become possible. Among all the parts of wireless sensor, the sampling part is decisive in getting signal, and the wireless communication technology decides the scope of the wireless sensor. The wireless sensor in this paper should monitor the remote area which is difficult in cabling, and should be feasible and convenient for the user.The step of the research on the wireless sensor is as follow:At first, the application of the wireless sensor in home and aboard are summarized based on the study of a lot of related literatures, the paper introduce the design of these wireless sensor briefly, and the application of the wireless communication specificly, then compare them. We choose the method of wireless sensor according to the transmitted range we ask for. In this paper, we choose GPRS network as the method of wireless communication.Secondly, We design the hardware of the wireless sensor after we choose its scheme. We choosd LPC2210 as the microprocessor amd DHT11 as the sensor. DHT11 is a sensor which can measure temperature and humidity. The wireless transmitter is connect the LPC2210 through the serial port of LPC2210.We adapt H7118 GPRS DTU of Shenzhen Hongdian company, and this wireless transmitter also be introduced in this part.Thirdly, after we design the hardware, we start to program the software. In order to make the whole system more stable, we adaptμC/OS-Ⅱoperation system in this wireless sensor. Before adapting it on LPC2210,we analyze the principle of the OS at first. After adapting it on LPC2210,we finish the client program.After accomplishment of the sampling and transmitting part, we choose KingView as the tool to make the interface of the monitor, and realize the function of receiving data.The design of the wireless sensor are summarized in the last part of this paper,and this part also analyze the disadvantage of the wireless sensor and discuss the tendency of the improvement of wireless sensor.