The Research Of Wierless Monitoring And Control System Based On ADxL345

Along with the rapid development of wireless communication technology, the sensor technology, information acquisition and processing technology, Wireless Sensor Network(WSN) can monitor, apperceive, collect and process all kinds of information about environment, and then translate them for the user. It can get detailed and accurate information after gathering original information, and then transmit it to the users. That's why WSN is widely applied in the area of national defense and military usage, national security, monitor and survey in environment, transportation management, medical treatment, sanitation, manufacturing, anti-terrorism, disaster salvation and so on.This thesis studies emphatically the wireless sensor nodes based on the acceleration sensor, and proposes wireless sensor network system implementations based on ADxL345. This system has the ability to detect node position, process and transfer information. So the system has a wide range of application prospects in wireless positioning, mode control, remote control car and a number of wireless games. For examples, this system can turn the vehicle forward, backward by adjusting the handle's orientation angle instead of using the arrow keys traditionally. As a result, the operator will have a more immersive feel. There are tow main functions for a node:(1) Gathering and processing information. The node controls the accelerometer ADxL345 to gather the data, read them by interrupting style and process them with the designed algorithms. The ADXL345 designed by ADI is a small, thin, low power,3-axis accelerometer with high resolution(13-bit) measurement at up to±16g, which is perfectly fit for mobile device applications. (2) Wireless transfering. As a node in the wireless sensor network, the sensor node plays a role as router and transmits information from other nodes. In this design, the data processed is transferred to other nodes or SINK node by wireless communication module CC1000. Finally the data is sent to the top by the serial interface to display.First this paper introduces the background and application of wireless sensor networks and analyzes the characteristics of WSN, and then designs and implements through the entire system, In the system, hardware consists of embedded micro-processor-ATMEGA128L, wireless communication module CC1000 and accelerometer ADxL345. In the software field, this paper designs the node system, data processing algorithms and the upper software systems.This paper describes how to build the test platform, detailed plans the trial process, summarizes the test results and points out the field that needs improvement.