Point To Multi-Point Wireless Measurement & Control System

With the development of computer technology, network technology and industrial automatic technology, the intelligent, networked measurement & control system has become the new industrial standard. The wireless network gets application on many environments because of its flexibility and easy-expansibility. The application of embedded real-time system in the slave computer improves the real-time character of the measurement & control system greatly. So this paper designs and realizes a point to multi-point communication platform of wireless measurement & control system which is based on embedded system. This system has many functions, such as data measurement and transmission, transmission of orders, parameter setting and system configures, etc.The method of modularization is used to design the system. It shortens the period and reduces the difficulty of development. The models connect with each other by serial port. This system adopts the structure of master-slave distribution. It is composed of an industrial computer (host computer), many SPCE061A single-chip computers (slaver computers) and BH-1 radio modem models of equal quantity. As control centre of the system, industrial computer controls the running of the whole system. And single-chip computers control the data gathering and order receiving which comes from host computer. Radio modem model is the communication interface of host computer and single-chip computers.The main tasks of the subject are that designing the structure of the point to muti-point wireless communication system and the applications development on the platform of real-timeoperation system μC /OS-Ⅱ and SPCE061A MCU-----writing source code for many kinds oftasks, such as data gathering, data transmission, signal preconditioning and receiving the control orders. On the side of host computer, we should carry on the setting of various parameters and system configures.In addition, in order to realize the connection of the system and ethernet, we have conducted the research to protocol converter. And in view of the flaw existing in the dynamic priority of μC /OS-Ⅱ, we made improvement.