Distributed process control system based on wireless personal area network and industrial ethernet network

A process control system and process control technology, applied in the direction of comprehensive factory control, electrical program control, comprehensive factory control, etc., can solve the problems of unguaranteed real-time communication and high power consumption, and achieve improved real-time communication and good power-saving performance. , the effect of broadening the application field

Inactive Publication Date: 2008-09-10
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Although ZigBee technology meets the requirements of low power consumption and has strong anti-interference ability, the real-time performance of communication cannot be guaranteed.
Although IEEE802.11 wireless LAN technology meets the real-time requirements of communication and has strong anti-interference ability, it consumes a lot of power

Method used

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  • Distributed process control system based on wireless personal area network and industrial ethernet network
  • Distributed process control system based on wireless personal area network and industrial ethernet network
  • Distributed process control system based on wireless personal area network and industrial ethernet network

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Embodiment Construction

[0043] The meanings of some frames, messages and packets involved in the present invention are as follows:

[0044] Beacon frame: It is a MAC frame defined by the IEEE802.15.4 media access control sublayer specification. In the present invention, the wireless field controllers, wireless sensors, and wireless actuators in the local process control subsystem perform time synchronization with beacon frames, and the beacon frames simultaneously carry the transmission power value of the wireless field controllers and the superframe Time slot position information of each sub-segment.

[0045] Command frame: It is a MAC frame defined by the IEEE802.15.4 media access control sublayer specification. In the present invention, the wireless field controllers, wireless sensors, and wireless actuators in the same wireless personal area network support connection request commands, connection response commands, disconnection notification commands, and data request commands, and also specific...

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Abstract

The invention provides a distributed process control system which is based on a wireless personal area network and an industrial Ethernet, comprising a plurality of local process control subsystems, an exchanger and a central monitoring computer, the local process control subsystems comprise a wireless field controller, a plurality of wireless sensors and a plurality of wireless actuators, the wireless sensors and the wireless actuators are positioned in a square area which takes the wireless field controller as a center, the wireless field controller is respectively connected with the wireless sensors and the wireless actuators by the wireless personal area network which contains two signal channels. The distributed process control system adopts the wireless personal area network to save the cost of the cables and installation and adopts a parallel transmission method of the double wireless signal channels and a forecasting dispatch protocol which is based on the information priority, thus improving the real-time property of the communication. The invention further provides two planning methods of the signal channels of a passing mode and an overlapping mode, thus ensuring the different signal channel clusters which are used by the adjacent local process control subsystems and reducing the wireless interference in all the subsystems.

Description

technical field [0001] The invention relates to the technical field of industrial process control, and in particular provides a distributed process control system based on wireless personal area network and industrial Ethernet. Background technique [0002] In the past ten years, with the rapid progress of embedded microprocessor technology, embedded operating system technology, computer network technology and automatic measurement and control technology, the architecture of the production process control system has gradually changed from the classic distributed control system DCS to the network control system. NCS transformation (field bus control system FCS can be classified into network control system NCS). In the currently used network control system NCS, the field controller and corresponding sensors and actuators are connected with data cables through field bus or industrial Ethernet. Compared with fieldbus, industrial Ethernet has faster data transmission speed and i...

Claims

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Application Information

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IPC IPC(8): G05B19/418H04L12/28H04L29/08
CPCY02P80/10Y02P90/02
Inventor 汪秉文张炼冬
Owner HUAZHONG UNIV OF SCI & TECH
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