CN101834674A - Method for building dual-redundancy optical fiber CAN bus network - Google Patents
Method for building dual-redundancy optical fiber CAN bus network Download PDFInfo
- Publication number
- CN101834674A CN101834674A CN 201010135845 CN201010135845A CN101834674A CN 101834674 A CN101834674 A CN 101834674A CN 201010135845 CN201010135845 CN 201010135845 CN 201010135845 A CN201010135845 A CN 201010135845A CN 101834674 A CN101834674 A CN 101834674A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- bus
- optical
- network
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a method for building a dual-redundancy optical fiber CAN bus network, which is characterized in that: two optical fiber CAN bus concentrators A and B, which have n non-cascaded optical ports and a cascaded optical port, of a dual-redundancy network are connected with n dual-redundancy CAN bus optical nodes which have two channels C and D ( each channel is comprised of a receiving/transmitting integrated optical module and a CAN controller) respectively through 2n single optical fibers; and thus, the dual-redundancy optical fiber CAN bus network is built. The method improves information transmission speed and loading capacity of the network, has a reliable mis-alignment preventing function, simplifies network structure, makes the installation and maintenance of the bus network convenient and improves the flexibility, reliability and safety of system network building.
Description
Technical field
The invention belongs to CAN bus network technology, particularly adopt the CAN bus hub of optical fibre wavelength-division multiplex transmitted in both directions signalling technique and be the dual-redundancy optical fiber CAN bus networking method of core with this hub.
Background technology
CAN (Controller Area Network) bus is a kind of non-destruction fieldbus networks of competition mechanism realization serial multi-host communication by turn that adopts, at present used CAN bus all is based on metal multiple twin shielding conductor and carries out the signal transmission, adopt the CAN bus network of metal multiple twin shielding conductor to have following problem: (1) easily causes the mismatch of bus parameter when bus node is too much; (2) the anti-interference safeguard measure of node circuit also can cause the mismatch of bus parameter; (3) Regional Distribution of node is excessive, and the distributed constant of cable causes the bus parameter mismatch; (4) internodal common mode potential difference exceeds electromagnetic interference that bus parameter mismatch that the transceiver predetermined characteristic causes and (5) electric wire exist etc., and these problems will cause the traffic rate of CAN bus network to descend and the reliability reduction.
Simultaneously, in order to solve the networking problem such as highly reliable applications such as Aero-Space, military hardwares, single remaining generally can't meet the demands, and adopts the redundance bus more, adopts two remainings at least, to improve the reliability of network.Promptly make up the identical A of two covers, B bus, and upload defeated identical information in bus, A, B bus be redundancy backup each other.
And optical fiber is a kind of medium of one-way transmission light signal, and has the characteristic of the electromagnetic interference exempted from.At present, optical fiber communication generally is to adopt two optical fiber to send respectively and received signal, and optical transmission module in the network node (LED) and Optical Receivers (PIN) are the devices of two standalone features; Connection between optic module and the optical fiber generally adopts the optical fiber connector to realize.The type of the optical fiber connector is a lot, and type commonly used at present has: SC, FC and ST etc.When constituting the CAN bus network of two remainings, reliable physical measure must be arranged, prevent the wrong plug of two remaining bus network optical fiber.
In the standard of CAN bus, which kind of transmission medium is the physical layer of limiting network do not adopt, and can adopt any media such as common metal line, metal multiple twin shielding conductor and optical fiber that is:.But, no matter adopt which kind of medium, all must guarantee the communication mechanism of CAN bus network, guarantee to meet fully on the networked physics layer definition of CAN bus standard, this also is the flexibility that the CAN bus standard is had.
At present, about the optical fiber CAN bus networking several embodiments have been proposed, mainly contain: the networking of optical fibre ring CAN bus, optical fiber CAN bus self-healing looped network and a kind of CAN hub networking plan based on two optical fiber etc., but exist light-electricity in these schemes, problem such as the electrical-optical conversion links is many, time-delay is long, Bus Speed is low, node is few and networking is dumb.
Summary of the invention
Purpose of the present invention: with the metallic twisted pair in the alternative CAN network of optical fiber, and on the basis of existing pair of optical fiber CAN bus hub, propose a kind of novel single fiber CAN bus hub, and adopt two such hubs formations to have the dual-redundancy CAN bus network of anti-wrong plug function and the cascade extended method of dual-redundancy CAN bus network based on wavelength division multiplexing two-way signaling transmission technology.
Technical scheme of the present invention is: the CAN controller of the present invention in the physical layer reservation CAN of CAN bus network network, the redesign networked physics layer, with receive/send out incorporate the alternative CAN transceiver of optical module LED/PIN, with single fiber alternative metals multiple twin shielding conductor, carry out message transmission with the light wave of receiving/send out different wave length, and guarantee to meet fully on the networked physics layer definition of CAN bus standard.
And the network-building method of a kind of pair of remaining simple optical fiber CAN bus hub proposed based on this, adopt 2n root single fiber to link to each other with n two remaining optical nodes two optical fiber CAN bus hubs, constitute two identical optical fiber CAN bus networks of A, B of two remainings with n non-cascade Guang Kou and a cascade light mouth.
The built-in programming device CPLD of described optical fibre optical fibre CAN bus hub is used for programming in logic; A n+1 receipts/integral optical module LED/PIN is used to light/electricity or electricity/light conversion of the information that realizes; Non-cascade light mouth of this hub and cascade light mouth adopt the combination (FC or SC type are adopted in definition in the literary composition) of the dissimilar optical fiber connector, as 1# ... n# optical module LED/PIN adopts the FC or the SC type optical fiber connector to constitute n non-cascade light mouth, and then n+1# optical module LED/PIN must adopt the different SC or the FC type optical fiber connector to constitute cascade light mouth; The output of the light in n+1 optical module-electricity conversion PIN circuit meets the input pin RX (1) of CPLD ... RX (n+1); The input of the electrical-optical conversion LED circuit in n+1 optical module meets the output pin TX (1) of CPLD ... TX (n+1); The optical fiber CAN bus hub can be operated in master mode or from mode, the hub of cascade light mouth end is operated in from mode, and the hub of non-cascade light mouth end is operated in master mode.
Described n the two remaining optical nodes with A, two passages of B, each passage include 1 CAN controller and 1 receipts/integral optical module LED/PIN; The receipts of two passages/send out integral optical module LED/PIN to adopt the dissimilar optical fiber connector; And the receipts of the receipts of each a passage/integral optical module and corresponding network optical fiber CAN bus hub side/send out an integral optical module LED/PIN also to adopt the dissimilar optical fiber connector, adopt the receipts of the SC/FC type optical fiber connector/send out incorporate optical module LED/PIN as A channel, the B passage then adopts the receipts of the FC/SC type optical fiber connector/send out incorporate optical module LED/PIN; The output of the light among the optical module LED/PIN-electricity conversion PIN circuit meets the input pin RXD of CAN controller, and the input of the electrical-optical conversion LED circuit among the optical module LED/PIN meets the output pin TXD of CAN controller.
The receipts of described any two a kinds of optical fiber connector types/integral optical module all adopts the light wave receipts/photos and sending messages of any two kinds of wavelength, the electrical-optical conversion LED circuit of receiving/sending out in the integral optical module as all FC type optical fiber connector all adopts the Tx=1310nm wavelength as send window, and light-electricity conversion PIN circuit adopts the Rx=1550nm wavelength as receive window; All SC type optical fiber connector receipts/integral optical modules are then just opposite, and electrical-optical conversion LED circuit wherein adopts the Tx=1550nm wavelength as send window, and light-electricity conversion PIN circuit adopts the Rx=1310nm wavelength as receive window.
Based on two remaining single fiber CAN bus network of optical fiber CAN bus hub, the A bus hub with n non-cascade Guang Kou and a cascade light mouth is connected by single fiber with n the two remaining optical nodes with C, D passage with B bus hub; The non-cascade light mouth of the n of A bus hub adopts the receipts of the FC type optical fiber connector/send out incorporate optical module LED/PIN, and cascade light mouth then adopts the receipts of the SC type optical fiber connector/send out incorporate optical module LED/PIN; B bus hub is then just opposite, and n non-cascade light mouth all adopts the receipts of the SC type optical fiber connector/send out incorporate optical module LED/PIN, and cascade light mouth then adopts the receipts of the FC type optical fiber connector/send out incorporate optical module LED/PIN; A, B bus hub link to each other respectively with the D passage by the C-channel of 2n root optical fiber with n two remaining optical nodes.
If described 2n root optical fiber one end is the SC/FC type optical fiber connector, then the other end is necessary for the FC/SC type optical fiber connector, the light mouth that has guaranteed the FC type optical fiber connector can only link to each other with the light mouth of the SC type optical fiber connector by above-mentioned simple optical fiber, realizes the anti-wrong plug function that network connects.
Described pair of remaining single fiber CAN bus network can be expanded by the cascade of hub, the optical module LED/PIN of the corresponding light mouth of A, B optical fiber CAN hub must adopt the dissimilar optical fiber connector, thereby guaranteeing that light mouth between cascade and non-cascade and A network and the B network can not cause because of the reason of connector connects; Two (from mode 1#A bus hub and master mode 2#A bus hubs) are the hubs with A of the same type (or B) bus network of n+1 light mouth, comparatively speaking, the hub of cascade light mouth end is operated in from mode, and the hub of non-cascade light mouth end is operated in master mode; Be connected with the non-cascade light of the #1 mouth (can insert other non-cascade light mouth arbitrarily) of master mode 2#A bus hub by single fiber from the cascade light mouth of mode 1#A bus hub; Thereby the local CAN network of two bus hubs is connected into a bigger network, and further extension of network is identical therewith.
Advantage of the present invention and beneficial effect are:
1, adopt receipts based on wavelength division multiplexing bidirectional transfer of information technology/send out integral optical module and complex programmable logic device (CPLD) to realize that the single fiber CAN bus hub of " line with " logic can link together a plurality of smooth CAN nodes, realizes meeting fully the CAN bus network of CAN bus specification;
2, employing is compared with other network-building method based on the method that this programme optical fiber CAN bus hub carries out networking, n+1 light mouth can realizing this hub is equivalent to " parallel connection ", reduce the time-delay in light mouth " series connection " type network opto-electronic conversion, electric light conversion and the Optical Fiber Transmission process, greatly improved the speed or the load capacity (number of nodes) of network information transfer;
When 3, adopting two single fiber CAN bus hubs to constitute two remaining single fiber CAN bus network, difference at hub place network, the light mouth of same position has been selected the optical module of different fiber connector model for use on the hub, can wrong plug from the optical fiber that physically guaranteed A, B bus network, make system have reliably anti-wrong plug function;
4, adopt a receipts/integral optical module, the light wave with 2 kinds of wavelength in an optical fiber carries out message transmission, has reduced the quantity of optical fiber and optical module, has simplified the network configuration, is convenient to the installation and maintenance of bus network;
5, hub cascade of the same type can realize that the expansion of dual-redundancy optical fiber CAN bus, the optical fiber CAN bus network after the expansion still have anti-wrong plug function, have greatly improved flexibility, reliability and the fail safe of system group network;
6, adopt the CAN bus network of optical fiber to have the electromagnetic interference capability of exempting from, greatly improved viability, fail safe and the reliability of CAN bus network in abominable electromagnetic environment, be particularly suitable for Aeronautics and Astronautics and application of military field;
7, adopt optical fiber to carry out the signal transmission, eliminated the inherent shortcoming of twisted-pair feeder transmission, improved the load capacity (number of nodes) and the traffic rate of bus.
Description of drawings
Fig. 1 is an optical fiber CAN bus hub block diagram of the present invention;
Fig. 2 is a building dual-redundancy optical fiber CAN bus network structured flowchart of the present invention;
Fig. 3 is the cascade expansion schematic diagram of the single redundancy optical fiber CAN bus of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail:
Above-mentioned optical fiber CAN bus hub realizes that by theory diagram shown in Figure 1 the built-in programming device CPLD of optical fiber CAN bus hub is used for programming in logic.A n+1 receipts/integral optical module LED/PIN is used to the light-electricity or the electrical-optical conversion of the information that realizes.Non-cascade light mouth of this hub and cascade light mouth adopt the combination (FC or SC type are adopted in definition in the literary composition) of the dissimilar optical fiber connector, as 1# ... n# optical module LED/PIN adopts the FC or the SC type optical fiber connector to constitute n non-cascade light mouth, and then n+1# optical module LED/PIN must adopt the different SC or the FC type optical fiber connector to constitute cascade light mouth; If make up the redundancy optical fiber CAN bus hub, then the optical module LED/PIN of A, the corresponding light mouth of B optical fiber CAN hub must adopt the dissimilar optical fiber connector, thereby guarantees that the light mouth between cascade and non-cascade and A network and the B network can not cause misconnection because of the reason of connector.The output of the light in n+1 optical module/electricity conversion PIN circuit meets the input pin RX (1) of CPLD ... RX (n+1); The input of the electrical-optical conversion LED circuit in n+1 optical module meets the output pin TX (1) of CPLD ... TX (n+1); The optical fiber CAN bus hub can be operated in master mode or from mode, the hub of cascade light mouth end is operated in from mode, and the hub of non-cascade light mouth end is operated in master mode.
Two remaining optical nodes that described n has A, two passages of B as shown in Figure 1, each passage includes 1 CAN controller and 1 receipts/integral optical module LED/PIN, the omission of other parts such as modal processor is not drawn.The receipts of two passages/send out integral optical module LED/PIN to adopt the dissimilar optical fiber connector; And the receipts of the receipts of each a passage/integral optical module and corresponding network optical fiber CAN bus hub side/send out an integral optical module LED/PIN also to adopt the dissimilar optical fiber connector, adopt the receipts of the SC/FC type optical fiber connector/send out incorporate optical module LED/PIN as C-channel, the D passage then adopts the receipts of the FC/SC type optical fiber connector/send out incorporate optical module LED/PIN; The output of the light among the optical module LED/PIN-electricity conversion PIN circuit meets the input pin RXD of CAN controller, and the input of the electrical-optical conversion LED circuit among the optical module LED/PIN meets the output pin TXD of CAN controller.
The receipts of any two a kinds of optical fiber connector types shown in Figure 1/integral optical module all adopts the light wave receipts/photos and sending messages of any two kinds of wavelength.For ease of describing, the electrical-optical conversion LED circuit that this paper defines in Fig. 2 in all FC type optical fiber connector receipts/integral optical modules all adopts the Tx=1310nm wavelength as send window, and light-electricity conversion PIN circuit then adopts the Rx=1550nm wavelength as receive window; All SC type optical fiber connector receipts/integral optical modules are then just opposite, and electrical-optical conversion LED circuit wherein adopts the Tx=1550nm wavelength as send window, and light-electricity conversion PIN circuit adopts the Rx=1310nm wavelength as receive window.
Two remaining single fiber CAN bus network based on the optical fiber CAN bus hub see Fig. 2 for details, and the A bus hub with n non-cascade Guang Kou and a cascade light mouth is connected by single fiber with n the two remaining optical nodes with C, D passage with B bus hub.The non-cascade light mouth of the n of A bus hub adopts the receipts of the FC type optical fiber connector/send out incorporate optical module LED/PIN in this legend, and cascade light mouth then adopts the receipts of the SC type optical fiber connector/send out incorporate optical module LED/PIN; B bus hub is then just opposite, and n non-cascade light mouth all adopts the receipts of the SC type optical fiber connector/send out incorporate optical module LED/PIN, and cascade light mouth then adopts the receipts of the FC type optical fiber connector/send out incorporate optical module LED/PIN.A, B bus hub link to each other respectively with the D passage by the C-channel of 2n root optical fiber with n two remaining optical nodes.
If described 2n root optical fiber one end is the SC/FC type optical fiber connector, then the other end is necessary for the FC/SC type optical fiber connector, so design has guaranteed that the light mouth of the FC type optical fiber connector can only link to each other with the light mouth of the SC type optical fiber connector by above-mentioned simple optical fiber, realizes the anti-wrong plug function that network connects.
Described pair of remaining single fiber CAN bus network can be expanded by the cascade of hub, and Fig. 3 has provided the cascade expansion schematic diagram of A bus network.Two (from mode 1#A bus hub and master mode 2#A bus hubs) are the hubs with A of the same type (or B) bus network of n+1 light mouth, comparatively speaking, the hub of cascade light mouth end is operated in from mode, and the hub of non-cascade light mouth end is operated in master mode; Cascade light mouth from mode 1#A bus hub in this schematic diagram is connected with the non-cascade light of the #1 mouth (can insert other non-cascade light mouth arbitrarily) of master mode 2#A bus hub by single fiber; Thereby the local CAN network of two bus hubs is connected into a bigger network, and further extension of network is identical therewith.The cascade expansion of B bus network is identical with the Cascading Methods of A bus network, repeats no more.
Below again operation principle of the present invention is described further:
In the dual-redundancy optical fiber CAN bus network shown in Figure 2, " recessiveness " position and " dominance " position that node CAN controller sends and receives show as high level and low level respectively on TXD and RXD pin.Light signal in fiber medium during transmitted in both directions, in the time of being designed to the optical signal transmission of certain window wavelength the counterparty upwards transmission be " dominance " position, when not having the optical signal transmission of certain window wavelength the counterparty upwards transmission be " recessiveness " position.When so design had guaranteed that optical fiber does not insert or caused because of certain reason that optical fiber is unexpected to be disconnected, the signal that enters hub is " recessiveness " position always, the proper communication that can " not block " other node.
When optical fiber CAN bus hub shown in Figure 1 was operated in master mode, the logic in the programmable logic device (CPLD) wherein designed by following n+1 set of equations:
TX(1)、TX(2)、…、TX(n)、TX(n+1)＝
RX(1)&RX(2)&…&RX(n)&RX(n+1) (1)
Its implication is n+1 the signal RX (1) that will be input among the CPLD, RX (2) ... RX (n), the whole phases of signal of RX (n+1) " with " after, send n+1 output TX (1) again back to, TX (2) ... TX (n), TX (n+1).Adopt the CPLD logical to substitute " line with " function of twisted-pair feeder.I unsettled not time spent of light mouth on hub, corresponding PIN does not have the light signal input, and the input RX (i)=1 of CPLD11 is " recessiveness " level, thus can not influence set of equations (1) " with " effect.
When the A channel CAN controller of the two remaining optical nodes of 1# shown in Figure 1 sends " dominance " or " recessiveness " position signal, corresponding being output as " low " level of TXD pin or " height " level, receive/send out that electrical-optical conversion LED circuit among the integral optical module LED/PIN " sends " or the light signal of " not sending " Ynm, this light signal arrives a receipts/integral optical module LED/PIN of optical fiber CAN bus hub 1# light mouth by the 1# Optical Fiber Transmission, whether the light among the LED/PIN-electricity conversion PIN circuit basis receives the Ynm light signal, output " low " level or " height " level signal also sent into the CPLD from RX (1) pin, the signal that this signal and other node are sent here " with " issue electrical-optical conversion LED circuit among the 1# light mouth LED/PIN by the output of TX (1) pin after the logical operation, and be " low " level or " height " level " sends " or the light signal of " not sending " Xnm according to TX (1), light-electricity that this light signal is received/sent out among the integral optical module LED/PIN by the C-channel that the 1# Optical Fiber Transmission turns back to the two remaining optical nodes of 1# is changed the PIN circuit, sends into the RXD input pin of the C-channel CAN controller of the two remaining optical nodes of 1# at last.
As the above analysis, " recessiveness " position that each optical node sends in the network or " dominance " position signal arrive hub, in CPLD, carry out " with " after the logical operation, beam back each node, meet of the requirement of CAN bus standard, so can guarantee that each node is realized the communication of competitive way by turn of the distinctive many main non-destruction of CAN bus in the network to the physical layer signal transmission characteristic.
In cascade network application scenario as shown in Figure 3, when A bus hub shown in Figure 1 was operated in from mode, the logic in the programmable logic device (CPLD) was wherein pressed itemize an equation (2) and n set of equations (3) design:
TX(n+1)＝RX(1)&…&RX(n) (2)
TX(1)，…，TX(n)＝RX(n+1) (3)
Its implication of aforesaid equation is n the signal RX (1) that will be input to from hub ... the whole phases of RX (n) (not comprising RX (n+1)) " with " after, TX (n+1) by cascade light mouth send in the primary hub with primary hub in all other signals again second phase " with " after, RX (n+1) from cascade light mouth gets back to from hub again, then from n output TX (1) ... TX (n) beams back each node.
As long as the logic of master and slave hub realizes that by (1), (2) and (3) design the cascade of hub can have a lot of levels, can only have a hub to be operated in master mode during multi-stage cascade, other hub all is operated in from mode.Along with the increase of cascade number, the node number that can insert increases, but the time-delay increase of signal transmission, so the highest attainable CAN Bus Speed descends thereupon.
Described optical fiber can adopt single mode or multimode fiber.
The receipts of described two kinds of different fiber connector models/send out integral optical module can adopt the FC and the SC type optical fiber connector also can adopt the combination of other different model.
It is Xnm (being defined as 1310nm in the literary composition) that the receipts of the described FC type optical fiber connector/a send out integral optical module can adopt any a transmission wavelength, and the reception wavelength is that the transmission rate of Ynm (being defined as 1550nm in the literary composition) is DC～1,2,3,5 or the baseband transmission type optic module of 10MHz.
It is Ynm (being defined as 1550nm in the literary composition) that the receipts of the described SC type optical fiber connector/a send out integral optical module can adopt any a transmission wavelength, and the reception wavelength is that the transmission rate of Xnm (being defined as 1310nm in the literary composition) is DC～1,2,3,5 or the baseband transmission type optic module of 10MHz.
CPLD with enough logical resources or FPGA that described programmable logic device (CPLD) can adopt any one company to produce realize.
Described CAN bus control unit can adopt the chip of any a CAN of meeting bus specification, as: SJA1000.
Claims (6)
1. method for building dual-redundancy optical fiber CAN bus network, it is characterized in that: two A, the B optical fiber CAN bus hub that will have a n non-cascade Guang Kou and a cascade light mouth, link to each other with n dual-redundancy CAN bus optical node by 2n root single fiber with C, two passages of D, thus the optical fiber CAN bus network of the two remainings of formation.
2. method for building dual-redundancy optical fiber CAN bus network as claimed in claim 1 is characterized in that: described optical fiber CAN bus hub constitutes n non-cascade Guang Kou and a cascade light mouth by a n+1 receipts/integral optical module and a slice programmable logic device (CPLD); The input pin RX (1) of the output termination CPLD of the light of n+1 optical module-power conversion circuit PIN ... RX (n+1); The output pin TX (1) of CPLD ... TX (n+1) connects the input of the electric-light conversion circuit LED in each optical module; The bus hub can be operated in master mode or from mode, adopts " line with " function of the logical function replacement twisted-pair feeder of CPLD.
3. the network-building method of optical fiber CAN bus hub as claimed in claim 1 or 2 is characterized in that: the CAN bus optical node of the described C of having, two passages of D, and each passage constitutes by 1 a receipts/integral optical module LED/PIN and 1 CAN controller; The receipts of two passages/send out integral optical module LED/PIN to adopt the dissimilar optical fiber connector; And the receipts of the receipts of each a passage/integral optical module LED/PIN and corresponding network optical fiber CAN bus hub side/send out an integral optical module LED/PIN also to adopt the dissimilar optical fiber connector; The output of the light among the optical module LED/PIN-electricity conversion PIN circuit meets the input pin RXD of CAN controller, and the input of the electrical-optical conversion LED circuit among the optical module LED/PIN meets the output pin TXD of CAN controller.
4. as claim 1,2 or 3 described method for building dual-redundancy optical fiber CAN bus network, it is characterized in that: the optical fiber connector of described A, B optical fiber CAN bus hub optical module adopt dissimilar combinations; Two types optical module LED/PIN realizes the light-electricity or the electrical-optical conversion of information respectively, and adopts the light wave receipts/signalling of different wave length; The non-cascade light mouth of consolidated network optical fiber CAN bus hub and cascade light mouth adopt the dissimilar optical fiber connector; The receipts of corresponding light mouth on two remaining A, the B optical fiber CAN bus hub/send out integral optical module to adopt the dissimilar optical fiber connector.
5. as claim 1,2,3 or 4 described method for building dual-redundancy optical fiber CAN bus network, it is characterized in that: the dissimilar optical fiber connector are taked at described 2n root optical fiber two ends, make that the light mouth on A (or B) the optical fiber CAN bus hub can only link to each other with the light mouth of C (or D) passage in two remaining optical nodes by this optical fiber.
6. as the network-building method of claim 1,2,3,4 or 5 described optical fiber CAN bus hubs, it is characterized in that: the cascade light mouth on described A (or B) the optical fiber CAN bus hub, its function is the expansion that is used for network, be operated in from the optical fiber CAN bus hub of mode and insert any one non-cascade light mouth of another optical fiber CAN bus hub of the same type that works in master mode with a single fiber, realize the expansion of network by cascade light mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010135845 CN101834674A (en) | 2010-03-31 | 2010-03-31 | Method for building dual-redundancy optical fiber CAN bus network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010135845 CN101834674A (en) | 2010-03-31 | 2010-03-31 | Method for building dual-redundancy optical fiber CAN bus network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101834674A true CN101834674A (en) | 2010-09-15 |
Family
ID=42718620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010135845 Pending CN101834674A (en) | 2010-03-31 | 2010-03-31 | Method for building dual-redundancy optical fiber CAN bus network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101834674A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103049414A (en) * | 2012-12-28 | 2013-04-17 | 中国航空工业集团公司第六三一研究所 | Method for converting and transmitting data between FC (fiber channel) bus and CAN (controller area network) bus |
| CN105353627A (en) * | 2015-10-30 | 2016-02-24 | 河北四方通信设备有限公司 | Optical fiber converter module intelligent wireless access device based on CPLD |
| CN109412918A (en) * | 2018-10-29 | 2019-03-01 | 北京无线电测量研究所 | A kind of CAN communication system |
| CN109873676A (en) * | 2017-12-05 | 2019-06-11 | 艾乐德电子（南京）有限公司 | A kind of CAN bus asynchronous communication method and network based on optical fiber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629019A (en) * | 2003-12-16 | 2005-06-22 | 中国科学院电工研究所 | Vehicle-carried CAN bus optical fiber hub |
| CN1674514A (en) * | 2005-03-17 | 2005-09-28 | 上海交通大学 | Controller local area network (LAN) bus communication hub based on optical fibre dielectric communication |
| CN1968175A (en) * | 2005-11-03 | 2007-05-23 | 阿尔卡特公司 | System and method for fast layer 2 protection in passive optical networks |
| CN101360346A (en) * | 2007-08-03 | 2009-02-04 | 日立通讯技术株式会社 | Passive optical network system and optical line terminal |
-
2010
- 2010-03-31 CN CN 201010135845 patent/CN101834674A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629019A (en) * | 2003-12-16 | 2005-06-22 | 中国科学院电工研究所 | Vehicle-carried CAN bus optical fiber hub |
| CN1674514A (en) * | 2005-03-17 | 2005-09-28 | 上海交通大学 | Controller local area network (LAN) bus communication hub based on optical fibre dielectric communication |
| CN1968175A (en) * | 2005-11-03 | 2007-05-23 | 阿尔卡特公司 | System and method for fast layer 2 protection in passive optical networks |
| CN101360346A (en) * | 2007-08-03 | 2009-02-04 | 日立通讯技术株式会社 | Passive optical network system and optical line terminal |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103049414A (en) * | 2012-12-28 | 2013-04-17 | 中国航空工业集团公司第六三一研究所 | Method for converting and transmitting data between FC (fiber channel) bus and CAN (controller area network) bus |
| CN103049414B (en) * | 2012-12-28 | 2015-04-15 | 中国航空工业集团公司第六三一研究所 | Method for converting and transmitting data between FC (fiber channel) bus and CAN (controller area network) bus |
| CN105353627A (en) * | 2015-10-30 | 2016-02-24 | 河北四方通信设备有限公司 | Optical fiber converter module intelligent wireless access device based on CPLD |
| CN105353627B (en) * | 2015-10-30 | 2023-10-20 | 上海威锐电子科技股份有限公司 | CPLD-based intelligent wireless access device for optical fiber converter module |
| CN109873676A (en) * | 2017-12-05 | 2019-06-11 | 艾乐德电子（南京）有限公司 | A kind of CAN bus asynchronous communication method and network based on optical fiber |
| CN109873676B (en) * | 2017-12-05 | 2020-07-03 | 艾乐德电子（南京）有限公司 | CAN bus asynchronous communication method and network based on optical fiber |
| CN109412918A (en) * | 2018-10-29 | 2019-03-01 | 北京无线电测量研究所 | A kind of CAN communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101826919B (en) | Mixed type passive optical network structure and method for positioning and restoring faults thereof | |
| EP1701468A1 (en) | Variable communication capacity data transmission device | |
| CN106059660B (en) | A kind of loop detection method, BBU, RRU and optical access network system | |
| CN101582723A (en) | CAN bus physical layer structure based on 1XN passive optical splitter (POS) | |
| CN101605151A (en) | A kind of system that is used for track traffic regional interlock and interior communication | |
| CN102412896A (en) | Optical line protection system for realizing single-end monitoring | |
| CN102026050A (en) | Optical fiber CAN bus hub and networking method thereof | |
| CN101834674A (en) | Method for building dual-redundancy optical fiber CAN bus network | |
| CN104393914A (en) | A multiplex route recovering method for an optical fiber differential protection device | |
| CN202334524U (en) | Optical link protecting system realizing single-end monitoring | |
| CN101588219B (en) | Optical layer protection method for ROADM in multi-node ROADM ring network | |
| CN108702557A (en) | PON-CAN bus architecture and robot system | |
| CN110062303B (en) | Mesh network-based self-adaptive high-capacity cross optical communication equipment architecture | |
| CN103957477A (en) | Power-grid-service-oriented optical switching method and network | |
| CN112260760B (en) | Nuclear power plant distributed control system field bus system based on optical loop | |
| CN101521613B (en) | Method for designing optical fiber communication network structure, and extensible network structure | |
| CN104333205A (en) | Converter valve stage control device for flexible alternating current power transmission | |
| CN104301028A (en) | Multiple-ring-tangency-type wavelength division multiplexing optical network system based on single fiber | |
| CN101141218B (en) | Protection switching system and method for wavelength division multiplexing load client network | |
| CN101345600B (en) | Method and system for implementing sub-wavelength passage sharing protection by electronic crossing mode | |
| CN101145857B (en) | A service convergence system for saving core router port | |
| CN101296389A (en) | Double-light self-cure protection type Ethernet light-exchange multi-service synthetic multiplexing device | |
| CN104320190A (en) | Remote node device in wavelength division multiplexing passive optical network system | |
| CN101662405B (en) | Communication circuit of CAN bus | |
| CN202551047U (en) | Transmission system of ethernet signal in private network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100915 |