CN203289445U - CAN network based on optical fiber communication - Google Patents
CAN network based on optical fiber communication Download PDFInfo
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- CN203289445U CN203289445U CN2013203799290U CN201320379929U CN203289445U CN 203289445 U CN203289445 U CN 203289445U CN 2013203799290 U CN2013203799290 U CN 2013203799290U CN 201320379929 U CN201320379929 U CN 201320379929U CN 203289445 U CN203289445 U CN 203289445U
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Abstract
The utility model discloses a CAN network based on optical fiber communication, and the network comprises an optical fiber concentrator. The optical fiber concentrator comprises a plurality of CAN transceivers which are in parallel connection, first optical receivers, and first optical transmitters, wherein each of the first optical receivers and each of the first optical transmitters are connected with each of the plurality of transceivers. Each of the first optical receivers is connected with a second optical transmitter via an optical fiber, and each of the first optical transmitters is connected with a second optical receiver via an optical fiber. The CAN network based on the optical fiber communication is characterized by small loss of signal, strong anti-interference capability and the like by the arrangement of the second optical transmitters, the second optical receivers, the first optical receivers and the first optical transmitters, and by utilizing optical fiber transmission to replace electric signal transmission.
Description
Technical field
The utility model relates to fiber-optic signal information communication field, particularly relates to a kind of network of CAN based on optical fiber communication.
Background technology
CAN(controller area network) controller area network is a kind of bus network that is widely used in industry spot.At present, the overwhelming majority's CAN network all adopts twisted-pair feeder as transmission medium in the world.Yet optical fiber, as emerging transmission medium, has good anti-emi characteristics, even the spy can realize high-quality signal transmission in abominable industrial environment.Compare with coaxial cable with twisted-pair feeder, optical cable also have the non-radiating energy, non-conductive, do not have problems such as the mutual interference effect of light signal.
Based on the superiority of above-mentioned optical fiber compared to twisted-pair feeder and coaxial cable, use optical fiber as the CAN communication media, to be conducive to guarantee the communication quality of CAN network, in order further to improve the performance of CAN network, development CAN network using optical fiber will be an important approach as transmission medium.
The utility model content
Use optical fiber as the CAN communication media for above-mentioned, will be conducive to guarantee the communication quality of CAN network, improve the problem of CAN network performance, the utility model provides a kind of network of CAN based on optical fiber communication.
For achieving the above object, a kind of network of CAN based on optical fiber communication that the utility model provides solves problem by following technical essential: a kind of network of CAN based on optical fiber communication, comprise fibre concentrator, described fibre concentrator comprises a plurality of CAN transceivers in parallel and is connected on the CAN transceiver the first optical receiver and the first optical transmitting set that connects, also be connected with second optical transmitting set by optical fiber on described each first optical receiver, also be connected with second optical receiver by optical fiber on described each first optical transmitting set.
by the CAN transceiver of a plurality of parallel connections be connected to the first optical receiver on transceiver and fibre concentrator that the first optical transmitting set forms, formed CAN network of network center, be connected to the second optical transmitting set and the second optical receiver on the first optical receiver and the first optical transmitting set, formed CAN network of network node, be that any two internodal communications are by the second optical transmitting set, optical fiber, the first optical receiver, CAN transceiver opto-electronic conversion, the conversion of CAN transceiver electric light, the first optical transmitting set, optical fiber, the second optical receiver optical fiber is completed transmission, between the second optical transmitting set and the first optical receiver, perhaps often distant between the second optical receiver and the first optical transmitting set, adopt spread fiber to replace direct propagation of electrical signals, has the loss of signal little, the characteristics such as antijamming capability is strong.
Further, also comprise the MCU of the built-in CAN controller that equates with the CAN number of transceivers, described MCU respectively be connected to same CAN transceiver on the second optical transmitting set be connected with the second optical receiver.
It is the MCU such as LPC2119, C8051F040 that the MCU of the built-in CAN controller that arranges can adopt model, send or receiving optical signals by built-in read-write register operation the second optical transmitting set or the second optical receiver, improve the controllability of the second optical transmitting set or the second optical receiver.
Further, also comprise signal access EMC circuit, described signal access EMC circuit is in parallel with described a plurality of CAN transceivers.
By the signal access EMC circuit that arranges, realize that the described network of CAN based on optical fiber communication is connected with the Dielectric Physics bus in the external world, conveniently complete its with the dielectric network in other nodes between communicate by letter, the signal of telecommunication that namely by the CAN transceiver, is converted to may produce higher interference voltage, signal access EMC circuit becomes electric current with higher voltage transitions, and finally with the form of heat, consumes.
Preferably, the optical fiber that is connected with optical receiver for optical transceiver is plastic fiber.
Plastic fiber is the optical fiber made from a kind of light penetrating copolymer, because can utilize the simple drawing process of polymer maturation, therefore cost compare is low, and soft, firm, diameter is large (approximately reaching 1mm), and connecting loss is lower.
Preferably, a plurality of CAN transceiver connecting lines in parallel are the shielded signal line, and described signal access EMC circuit is the shielded signal line with the connecting line of a plurality of CAN transceiver parallel connection in parallel.Be set to the shielded signal line to avoid the external interference signal to enter the inner conductor interference, reduce simultaneously the loss of signal transmission, be conducive to guarantee the electric signal transmission quality.
The utlity model has following beneficial effect:
Due in the CAN network, often distant between each node, adopt that the signal of telecommunication realizes that intercommunication mutually between each node exists that the loss of signal is large, the easy shortcoming such as disturbed of signal, by the second optical transmitting set, the second optical receiver and the first optical receiver, the first optical transmitting set are set, utilize spread fiber to replace propagation of electrical signals, have the characteristics such as the loss of signal is little, antijamming capability is strong; Signalization access EMC circuit, be convenient to safety and realize being connected with the Dielectric Physics bus in the external world based on the CAN network of optical fiber communication.
Description of drawings
Fig. 1 is the topological diagram of a kind of network implementation of CAN based on optical fiber communication example 1 described in the utility model;
Fig. 2 is the topological diagram of a kind of network implementation of CAN based on optical fiber communication example 2 described in the utility model;
Fig. 3 is the circuit diagram of the specific embodiment of signal access EMC circuit described in a kind of network implementation of CAN based on optical fiber communication example 2 described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with embodiment, but structure of the present utility model is not limited only to following examples.
Embodiment 1:
As Fig. 1, a kind of network of CAN based on optical fiber communication, it is characterized in that: comprise fibre concentrator, described fibre concentrator comprises a plurality of CAN transceivers in parallel and is connected on the CAN transceiver the first optical receiver and the first optical transmitting set that connects, also be connected with second optical transmitting set by optical fiber on described each first optical receiver, also be connected with second optical receiver by optical fiber on described each first optical transmitting set.
by the CAN transceiver of a plurality of parallel connections be connected to the first optical receiver on transceiver and fibre concentrator that the first optical transmitting set forms, formed CAN network of network center, be connected to the second optical transmitting set and the second optical receiver on the first optical receiver and the first optical transmitting set, formed CAN network of network node, be that any two internodal communications are by the second optical transmitting set, optical fiber, the first optical receiver, CAN transceiver opto-electronic conversion, the conversion of CAN transceiver electric light, the first optical transmitting set, optical fiber, the second optical receiver optical fiber is completed transmission, between the second optical transmitting set and the first optical receiver, perhaps often distant between the second optical receiver and the first optical transmitting set, adopt spread fiber to replace direct propagation of electrical signals, has the loss of signal little, the characteristics such as antijamming capability is strong.
Embodiment 2:
The present embodiment is further improved on the basis of embodiment 1, as Fig. 2, a kind of network of CAN based on optical fiber communication, the MCU that also comprises the built-in CAN controller that equates with the CAN number of transceivers, the MCU of described a plurality of built-in CAN controllers each respectively be connected to same CAN transceiver on the second optical transmitting set be connected with the second optical receiver; Also comprise signal access EMC circuit, described signal access EMC circuit is in parallel with described a plurality of CAN transceivers.
The MCU of the built-in CAN controller that arranges sends or receiving optical signals by built-in read-write register operation the second optical transmitting set or the second optical receiver, improves the controllability of the second optical transmitting set or the second optical receiver; By the signal access EMC circuit that arranges, realize that the described network of CAN based on optical fiber communication is connected with the Dielectric Physics bus in the external world, conveniently complete its with the dielectric network in other nodes between communicate by letter, the signal of telecommunication that namely by the CAN transceiver, is converted to may produce higher interference voltage, signal access EMC circuit becomes electric current with higher voltage transitions, and finally with the form of heat, consumes.
Claims (6)
1. network of the CAN based on optical fiber communication, it is characterized in that: comprise fibre concentrator, described fibre concentrator comprises a plurality of CAN transceivers in parallel and is connected on the CAN transceiver the first optical receiver and the first optical transmitting set that connects, also be connected with second optical transmitting set by optical fiber on described each first optical receiver, also be connected with second optical receiver by optical fiber on described each first optical transmitting set.
2. a kind of network of CAN based on optical fiber communication according to claim 1, it is characterized in that, the MCU that also comprises the built-in CAN controller that equates with the CAN number of transceivers, described MCU respectively be connected to same CAN transceiver on the second optical transmitting set be connected with the second optical receiver.
3. a kind of network of CAN based on optical fiber communication according to claim 2, is characterized in that, also comprises signal access EMC circuit, and described signal access EMC circuit is in parallel with described a plurality of CAN transceivers.
According to claim 1 to 3 any one described a kind of network of CAN based on optical fiber communication, it is characterized in that, the described optical fiber that is connected with optical receiver for optical transceiver is plastic fiber.
5. a kind of network of CAN based on optical fiber communication according to claim 1 and 2, is characterized in that, the connecting line between a plurality of CAN transceivers in parallel is the shielded signal line.
6. a kind of network of CAN based on optical fiber communication according to claim 3, is characterized in that, signal access EMC circuit is the shielded signal line with the connecting line of a plurality of CAN transceivers in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203799290U CN203289445U (en) | 2013-06-28 | 2013-06-28 | CAN network based on optical fiber communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203799290U CN203289445U (en) | 2013-06-28 | 2013-06-28 | CAN network based on optical fiber communication |
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| CN203289445U true CN203289445U (en) | 2013-11-13 |
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| CN2013203799290U Expired - Fee Related CN203289445U (en) | 2013-06-28 | 2013-06-28 | CAN network based on optical fiber communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346942A (en) * | 2013-06-28 | 2013-10-09 | 成都思迈科技发展有限责任公司 | Can |
| CN106549712A (en) * | 2016-12-09 | 2017-03-29 | 广东电网有限责任公司电力科学研究院 | A kind of battery management system of employing optical fiber CAN communication |
| CN108390721A (en) * | 2018-05-10 | 2018-08-10 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser internal signal transmission system |
| CN113746553A (en) * | 2021-09-08 | 2021-12-03 | 北京机电工程研究所 | Intelligent networking system based on multiple zones |
-
2013
- 2013-06-28 CN CN2013203799290U patent/CN203289445U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346942A (en) * | 2013-06-28 | 2013-10-09 | 成都思迈科技发展有限责任公司 | Can |
| CN106549712A (en) * | 2016-12-09 | 2017-03-29 | 广东电网有限责任公司电力科学研究院 | A kind of battery management system of employing optical fiber CAN communication |
| CN108390721A (en) * | 2018-05-10 | 2018-08-10 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser internal signal transmission system |
| CN108390721B (en) * | 2018-05-10 | 2023-12-19 | 武汉锐科光纤激光技术股份有限公司 | Laser internal signal transmission system |
| CN113746553A (en) * | 2021-09-08 | 2021-12-03 | 北京机电工程研究所 | Intelligent networking system based on multiple zones |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20140628 |
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| EXPY | Termination of patent right or utility model |