Vehicle-carried CAN bus optical fiber hub

A CAN bus and optical fiber hub technology, which is applied in the field of serial communication devices, can solve the problems such as no application examples of plastic optical fibers, and achieve the effect of improving the data communication rate and the success rate of data transmission, high cost, and ensuring real-time performance.

Inactive Publication Date: 2006-10-18
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no application example of plastic optical fiber in CAN bus in the field of automotive electronics in China

Method used

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  • Vehicle-carried CAN bus optical fiber hub
  • Vehicle-carried CAN bus optical fiber hub
  • Vehicle-carried CAN bus optical fiber hub

Examples

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Embodiment Construction

[0013] The circuit principle and working principle of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0014] figure 1 It is a structural block diagram of a specific embodiment of the "vehicle CAN bus plastic optical fiber hub" of the present invention. It is composed of N plastic optical fiber transmission and reception and lossless arbitration circuit I, and signal conversion circuit II. The circuit I and the signal conversion circuit II are connected as one; 11 is the receiving signal that can implement the line and logic operation; 12 is the sending and receiving of N plastic optical fibers and the sending signal of the lossless arbitration circuit. Each independent plastic optical fiber sending and receiving and lossless arbitration circuit corresponds to a CAN bus electronic controller. figure 1 The detailed description of the plastic optical fiber sending and receiving and lossless arbitration circuit ...

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Abstract

This invention relates to vehicle mounted CAN bus fiber concentrator and to a serial communication device between car inner devices. It comprises N pieces of plastic sending and receiving and lossless arbitration circuit 1 and signal exchanging circuit II. The light signals sent from the plastic fiber is converted into electric signals through plastic fiber receiving circuit and computes through the photoelectricity receiving circuit related line and logic diode and then are converted into electric signals suitable to the plastic fiber sending circuit through signal conversion circuit. Finally the electric signals are converted into light signals through fiber sending circuit to realize the CAN bus plastic fiber transmission.

Description

Technical field [0001] The invention relates to a vehicle-mounted CAN bus optical fiber hub, which relates to a serial communication device for information exchange between electronic devices inside the vehicle. Background technique [0002] CAN bus is a serial communication method to realize information exchange between electronic devices in modern automobiles. The method is to use a pair of twisted metal wires to respectively connect the output signal CANH and CANL signal output terminals of the CAN communication interface integrated circuit in each electronic device to form a data communication network and complete the information exchange between the electronic devices inside the car. [0003] The data exchange between the various electronic devices inside the car requires high real-time performance. In the existing CAN bus system inside the car, the communication medium is metal twisted pair. With the increase of electronic devices inside the car, the data exchange bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R27/00H04B10/12G06F3/01B60R99/00H04B10/25
Inventor 唐晓泉王丽芳周超胡广艳
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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