Design And Implementation Of Smart Sensor Networks Based On SOPC System

Wireless sensor network(WSN) is a large number of sensors and with self-building networking functions and multi-hop wireless data communications network consisting of a sensor network, widely used in the battlefield situational awareness, environmental monitoring, medical data collection, intelligent transportation, smart home, industrial manufacturing and other fields. This thisis with the needs of the current railway transport of goods designed a smart sensor networks based on SOPC system, it can realize real-time monitoring of freight train running status and tracking. Wireless sensor networks and SOPC system combined to form a "smart" sensor network in this thisis. The sensor data can be updated in real time and displayed on the LCD screen and remote ground center web. This smart system can also recognize sensor alarm, monitoring network status, autonomous recovery network independently.The SOPC devices use Xilinx’s Zynq-7000 series XC7Z020, the Linux operating system transplanted on Zynq-7000 in this thisis, data exchange via TCP protocol network port, RS232 serial port and other communications modules. The QT graphic interface runs on the Linux systems, realizing the graphics display. The wireless sensor networks use TI’s CC2530 witch based on the Zig Bee protocol. The Z-Stack protocol stack is transplanted on the CC2530 chip, and the wireless data transmission network, RS-232 serial communication and network monitoring is completed with the embeded OSAL system. Contents of this paper are divided into the following areas:Take research on the Zynq-7000 SOPC chip design platform settings and operating system boot process, and use SDK to complete TCP and UDP communication with Socket programming.Design the SOPC host computer programs according to the system solutions. The programs need to integrate a communication module, a wireless sensor network functions, and abnormal information processing and judgment, and also design a communication interface with the QT program. The program can monitor the communication modules and wireless sensor network information data through the multiple threads design, and it can be compiled by the Xilinx provide SOPC cross compiler tools into a dynamic link library. The QT interface program and then combined the dynamic link library to generate a final and complete executable programs.Design the QT programs according to the system solutions, including the major interface design and the Server Adapter communication interface design.Take research on the TI’s Z-Stack Zig Bee protocol stack. It focuses on the operating system abstraction layer(OSAL) operational mechanism. On this basis, the design is complete the program application layer design, implementation of data transmission of wireless sensor networks, protocol analysis, network monitoring, functional interface communication, and also complete the data reading and computation of the sensors.Because the system involves many technical and functional modules, system integration capability is an important point of the study. System testing and commissioning and functional test results show that the entire system can be perceived through the wireless sensor network data from each sensor. Real-time monitoring, network status control can be realized, and abnormal data can also be detected and processed. The whole system solution is implemented.