The Study Of WSN Node Based On CC2431

Wireless Sensor Network (WSN), which integrates the technologies of sensor, embedded computating, modern network and wireless communicating.is a novel mode of computing and a hotspot of information technology following Internet. It will make a profound influence on many areas in 21 st century.The WSN (Wireless Sensor Networks) can be real-time monitoring, sensing, acquiring and processing the information, which has very broad prospects. It is an emerging hot technology, and has been concerned on all over the world.Sensor node is the basic unit of wireless sensor network.Generally speaking, it consists of the sensor module, processor module, wireless communication module, power management module. Firstly, data is collected by the sensor module, and then the processor module carries out the necessary data processing, finally the data is transmited through the wireless communication module to the destination. In the process of Sensor node operating, power management module plays the role of supplying power to sensor node and extending the life of sensor node. Sensor node has very limited hardware resources, mainly limited energy, the limited communicating capability, limited computing and processing power. When we design and operate the sensor node, it is necessary for us to take into account the above-mentioned problems.Based on the analysis of classic architecture of the existing sensor node, we designed a kind of wireless sensor network node in accordance with the requirements of our project. We adopted SOC design of an integrated MCU + RF transceiver module. Ultimately, we chose CC2431 chip integrated single-chip machine, CC2420 RF module and location engine, which is manufactured by CHIPCON. Sensor node's main circuits consist of the peripheral circuits of CC2431, radio frequency circuits and interface circuits, and so on. Then we added C8051F320 SCM, a USB communicating interface circuits, power supplying and detection circuits to the general sensor node, this was the design of the gateway node. At the same time, we also analysed the lunar surface environment. We considered the possible impact of the lunar surface environment on the sensor node and gave the corresponding solutions. However, due to existing conditions, we failed to add the packages to the sensor node.In accordance with the hardware resources of sensor node, we designed and finished functions of four important modules of the sensor node. Based on the communicating mechanism and the related set of hardware resources of CC2431 radio module, we added wireless communication module to the SOS operating system. I analysed the main performance of the loction engine, positioning theory, the process of the operation of location engine and the measurement of the relevant positioning parameters. I completed tcompiling the relevant codes about sensor module. After analysing four power modes of CC2431, because energy consumption of the sensor node is mainly used by the radio frequency module, I designed how to send data to achieve the low energy consumption as low as posible.Finally, in order to test performance of sensor node designed by us. We carried out four tests, including test of energy consumption of sensor node, test of RSSI, the test of packet loss rate and the test of the positioning, and then analysed the four test results. Test results showed that the design of the sensor node could meet the application requirements.This dissertation is supported by National Natural Science Foundation of China under Grant No. 60535010...