Nuclear Environmental Information Remote Acquisition Techniques

Today, the information acquisition system of nuclear environment is mainly by fieldwork. However, with the development of electronics technology and network technology, it is possible to integrate embedded system and network technology into nuclear information acquisition system. To compare with the traditional fieldwork, its advantage is obvious, such as: environment influence free, enhanced controlling function and reliability of the system, especially it can be applied in some special nuclear project.In this paper, the author discusses the way of nuclear environment information acquisition in field and information's transmission. According to the above discussion, the author proposes a design method and a project to realize the nuclear information remote acquisition system and research the key technology in both of the software and hardware deeply.Client/Server mode is applied in this system. The server is composed of a local information acquisition subsystem and remote information transmission and control subsystem which based on Internet. The server is placed in monitored field. In this system, a computer is used as a client, which monitor software is run. The server and the client communicate each other by LwIP protocol and user-defined communication protocol in Internet.The key technology to realize this design is information transmission and control subsystem based on Internet. The key hardware of the design uses a FPGA chip. On the FPGA chip, the SOPC which base on the Nios.II soft core processor and the peripherals is implemented in it. All of these build up a flexible embedded system. In the software of the SOPC, MicroC/OS2 real-time operating system and LwIP light weight TCP/IP stack have been ported. There are three tasks running on MicroC/OS2, one take charge for internet communication, the other for local information acquisition, all of tasks exchange data by message queue.Under the development circumstance of C++ Builder, the remote monitor terminal run in Windows platform, applied socket technology to process network program so that a high effectually Internet connect with remote sever is realized.