Laboratory Network System Based On Fieldbus Design

There already is a common acquaintance in universities to importance of experiment in higher education, and universities have making enormous efforts to provide better condition. To establish open laboratory has been orientation that ask for a higher management on experimental equipment. Considering the problems that exist in the management of equipments in laboratory, a new structure of laboratory based on the rapidly developing field bus system has been realized:1. A total layout of laboratory network based on field bus is put forward.2. Hardware realization of laboratory network system. A keycomponent of laboratory network system------MFCU (MultipleFunctions Control Unit) is given to meet the need of the variety of experiments.3. Using RS-232 bus and RS-485 bus, some researchs were made on communication between different CPUs, and realized the network between experimental equipments that have different interfaces.4. Software realization of laboratory network system. The software for computer inspecting and controling experimental equipments and the software for MFCU are realized after designing the layered communication protocol.5. How to realize CRC algorithm in microchip has been discussed in this paper, and the related coding work has been done.6. Testing of the whole system. Having construted the whole system, a test to secure the reliability of the system has been taken.