改进的无线传感网络节点定位系统的设计与研究

Design and research of improved node positioning system for wireless sensor network

由于传感器网络节点容易受到干扰,传统的无线传感器网络节点定位系统无法对预定位信息进行有效控制,定位精度和定位效率均不高,故设计定位精度和定位效率均较高的无线传感网络节点定位系统。该系统利用CC2430芯片控制全局,对复位电路、调试电路和串口电路进行重点改进。CC2430芯片利用差分控制方法对系统运行中产生的预定位信息进行控制,获取预定位物体的最终定位信息。复位电路对传入系统的预定位物体信息进行分类,将预定位信息实时传输至串口电路,其自身状态信息将传输至调试电路。调试电路对复位电路中的电流和元件能耗进行调试,保障复位电路的正常运行。串口电路通过协调器与CC2430芯片连接,实现预定位信息向CC2430芯片的高效、精准传输。软件给出系统定位函数,以及虚拟测量计算方法的定位流程图。实验结果表明所设计的系统拥有较高的定位精度和定位效率。

The wireless sensor network （WSN） node positioning system with high positioning accuracy and high positioning efficiency was designed to overcome the disturbance, control the preposition information effectively, and improve the positioning accuracy and positioning efficiency. CC2430 chip is used in the system for the global control. The reset circuit, debugging circuit and serial interface circuit were improved. The differential control method is adopted to control the preposition information generated in the system operation by means of the CC2430 chip, and get the final location information of the preposition object. The reset circuit is used to classify the preposition object information transmitted in the system, and transmit the preposition object information to the serial interface circuit in real time and its status information to the debugging circuit. The debugging circuit is used to debug the energy consumption of the components and the current in the reset circuit to ensure the normal opera- tion of the reset circuit. The serial interface circuit is connected with the CC2430 chip through the coordinator to transmit the preposition information to the CC2430 chip efficiently and accurately. The system positioning functions, virtual measurement calculation method and positioning flow chart are given by software. The experiment results show that the designed system has high positioning accuracy and positioning efficiency.