Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fiber-optical dual ring redundancy controller for controller local area network

A technology for controllers and optical fiber receivers, applied in ring networks, data exchange networks, digital transmission systems, etc., can solve problems such as system crashes, inability to use double-ring redundancy strategies, and large signal delays, so as to achieve improved reliability and good performance. Achievability, the effect of simple method

Inactive Publication Date: 2004-12-29
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the star coupler fails, the entire system will collapse. Another disadvantage of the star structure is that it is not convenient for fiber optic wiring.
[0005] In order to overcome the above shortcomings, a ring structure can be considered, but the signal delay of the ring structure is relatively large, and the single ring structure is not reliable enough, so a double ring redundant structure is required
CAN is an asynchronous communication protocol and cannot use the double-ring redundancy strategy adopted in the data communication network.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fiber-optical dual ring redundancy controller for controller local area network
  • Fiber-optical dual ring redundancy controller for controller local area network
  • Fiber-optical dual ring redundancy controller for controller local area network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] exist figure 1 Among them, the dual-ring redundant controller 1, as a transceiver part of a CAN node, is connected between the CAN interface 2, the main ring optical fiber receiver 3, the main ring optical fiber transmitter 4, the secondary ring optical fiber transmitter 5 and the secondary ring optical fiber receiver 6 between. The dual-ring redundant controller includes a main-ring signal transponder 7 , a main-ring signal selector 8 , a secondary-ring signal selector 9 and a clock generator 10 .

[0024] The function of the main ring signal repeater 7 is to realize the signal forwarding between the CAN node and the optical fiber ring. When a CAN node wants to send data, it sends the data frame signal to the main ring signal transponder 7 through the CAN interface of the node, and the main ring signal transponder 7 sends the signal to the optical f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an optical fibre bicyclo redundancy controller for controlling local area network, comprising a major ring signal selector, a minor ring signal selector, a major signal repeater and a clock generator, wherein the controller is linked between a CAN interface, a major-minor ring optical fibre receptor and a major-minor ring optical fibre sender as a transmitting-receiving unit of the CAN node, the functions of the major signal selector and the minor signal selector are to dynamically forming an optical fibre working loop, the function of the major ring signal repeater is to realize a signal transfer between the CAN node and the optical fibre loop, and the clock generator is designed to provide a clock signal acquired by the operation of the circuit.

Description

technical field [0001] The invention belongs to the field of computer field bus peripheral equipment, in particular, the invention relates to an optical fiber double-ring redundant controller applied to a controller area network (CAN). Background technique [0002] Controller Area Network (CAN for short) is a field bus standard proposed by the German Bosch company in 1986, and became the ISO11898 international standard in 1993. CAN is used in industrial control fields such as automobiles, electric power, machinery, and chemicals It has been widely used and has become one of the mainstream technologies of industrial digital communication. [0003] At present, most CAN networks in the world use twisted-pair wires as the transmission medium. Twisted pair has the advantages of low price and strong anti-interference ability. However, in some occasions with strong electromagnetic interference, the reliability of communication cannot be guaranteed, and the transmission distance o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L12/24H04L12/42H04L12/437
Inventor 谢经明陈幼平陈冰周祖德陈少卿艾武余文勇
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products