CN106375010B - A kind of fiber optic local area network CAN bus control device and networking - Google Patents
A kind of fiber optic local area network CAN bus control device and networking Download PDFInfo
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- CN106375010B CN106375010B CN201610772581.XA CN201610772581A CN106375010B CN 106375010 B CN106375010 B CN 106375010B CN 201610772581 A CN201610772581 A CN 201610772581A CN 106375010 B CN106375010 B CN 106375010B
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- 239000000835 fiber Substances 0.000 title claims abstract description 16
- 230000006855 networking Effects 0.000 title claims abstract description 7
- 239000013307 optical fiber Substances 0.000 claims abstract description 52
- 230000037361 pathway Effects 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 235000008409 marco Nutrition 0.000 description 1
- 244000078446 marco Species 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/278—Bus-type networks
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
- G05B19/41855—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1136—Canbus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses CAN bus, electrical level transferring chip, isolating chip, optical fiber input/output interface, electric signal CAN interfaces on a kind of fiber optic local area network CAN bus control device, including light-path unit, electric pathway unit, control unit, impedance matching resistor, plate；The light-path unit has two interfaces of sending and receiving；The electric pathway unit is the electric signal CAN interface of standard；The control unit includes CPU and CAN controller two parts；CAN bus is on the plate for realizing CAN networking function；It also discloses it and is used for incoming fiber optic or electric signal equipment, for the interconnection of two local area network (LAN) CAN bus control devices, for realizing the connection between two or more CAN local area networks；The optical signal of outside access is converted to electric signal and is connected in bus by the present invention, realize the CAN bus of local area network type, to set up the optical fiber CAN network of interconnection, optical splitter function, while compatible multi-channel optical fibre interface and electric signal interface are realized by CAN bus on plate.
Description
Technical field
The invention belongs to Communication Control technical field more particularly to a kind of fiber optic local area network CAN bus control device and groups
Net is mainly used in the foundation and connection extension of fiber optic local area network CAN bus.
Background technique
Mostly in existing fiber optic local area network CAN bus technology is to form closed loop structure by the optical fiber of two one-way transmissions
At as shown in Figure 1.
Will turn electricity-electricity by light in each node in this way and turn the process of light, cause to be delayed with the increase of number of nodes and
Linear increase.
The quantity of CAN node is limited under the requirement of fiber optic local area network CAN bus timing in this way.
In addition, the interconnection of optical fiber is realized in some applications by optical splitter, although as shown in Fig. 2, this solves node
The problem of delay, but its cost increased and scalability is also bad.
Summary of the invention
In order to overcome the shortcomings and deficiencies of the prior art, an object of the present invention is to provide a kind of fiber optic local area network CAN
Bus control device.
The technical solution adopted by the present invention to solve the technical problems is: a kind of local area network (LAN) CAN bus control device, including
CAN bus on plate, one end of CAN bus connects control unit by control side electrical level transferring chip on the plate, and CAN is total on plate
The other end of line is connected separately with light-path unit and electric pathway unit, institute by passage side electrical level transferring chip and isolating chip
The light-path unit stated has more than one and is arranged in parallel, and the control unit number is identical as light-path unit and in parallel sets
It sets；
The light-path unit is by the driving circuit by TX interfacing path side electrical level transferring chip, optical fiber output
It interface and is made up of the driving circuit of RX interfacing path side electrical level transferring chip, optical fiber input interface；The electricity is logical
Road unit is made of the electric signal CAN interface of two output ends of CANH and CANL of connection isolating chip；The control unit
CPU+CAN controller by connecting control side electrical level transferring chip with RX interface by TX interface forms；CAN bus both ends on plate
At least one control side electrical level transferring chip and at least one passage side level conversion core are separately connected by impedance matching resistor
Piece.
A kind of fiber optic local area network CAN bus control device, light-path unit, electric pathway unit and control unit
Compatible multichannel extension.
The second object of the present invention is to provide a kind of optical fiber CAN node unit, including above-mentioned local area network (LAN) CAN bus marco dress
It sets, further includes for accessing the optical fiber or electric signal equipment that have optical fiber input/output interface, the optical fiber or electric signal are set
For by the CPU+CAN of the driving circuit of connection optical fiber input/output interface, the TX/RX of connection driving circuit and connection TX/RX
Controller composition.
The third object of the present invention is to provide a kind of optical fiber CAN local area network, is filled by two above-mentioned local area network (LAN) CAN bus marcos
Set connection composition.Two local area network (LAN) CAN bus control devices pass through the optical fiber connection between optical fiber input/output interface；Alternatively,
Two local area network (LAN) CAN bus control devices pass through shielded cable or mother daughter board connector connection between electric signal CAN interface.
The fourth object of the present invention is to provide a kind of fiber optic local area network networking, mutual by two above-mentioned optical fiber CAN local area networks
It is formed by connecting, farther out or the two or more CAN for the otherwise requirement such as have high_voltage isolation for realizing distance
Connection between local area network, the connection are connected using optical fiber or shielded cable.
The beneficial effects of the present invention are:
Interconnection media is provided for the external CAN of multichannel by establishing on plate CAN bus, to realize in the form of local area network
The interconnection of optical fiber CAN, electric signal CAN, is effectively controlled node delay, also solves single in optical fibre ring CAN network
Route will cause the problem of whole network disconnects, and a CAN bus office can be formed by way of multiple boards connect
Domain net, extension is very convenient, and effectively reduces cost.
Compared with prior art, the present invention carries out the connection of optical fiber CAN bus using local area network optical fiber CAN bus, can be with
Point spread is realized by local area network (LAN) CAN unit, has very strong scalability, the disconnection of the route of individual node not will cause entirely
The failure of network is improved the reliability of network, optical fiber CAN network is set up in a manner of local area network, and net can be effectively controlled
Network transmission delay avoids network failure caused by sequence problem.
Detailed description of the invention
Fig. 1 is that the optical fiber of two one-way transmissions forms the node schematic diagram of closure CAN loop；
Fig. 2 is the node schematic diagram that optical fiber internet is realized by optical splitter；
Fig. 3 is the structural schematic diagram of bus control device of the present invention；
Fig. 4 is the structural schematic diagram of the first application of bus control device of the present invention；
Fig. 5 is the structural schematic diagram of second of bus control device of the present invention application；
Fig. 6 is the structural schematic diagram of the third application of bus control device of the present invention.
Specific embodiment
In order to more clearly illustrate the present invention program, summary of the invention is carried out with example with reference to the accompanying drawing further
Explanation.It should be appreciated that described herein is specifically that the examples are only for explaining the invention, protection scope is not limited to described
Example.
As shown in figure 3, it is the entire local area network (LAN) CAN of composition the invention discloses a kind of local area network (LAN) CAN bus control device
CAN bus, control in the basic unit of network, including light-path unit, electric pathway unit, control unit, impedance matching resistor, plate
Side processed/passage side electrical level transferring chip, isolating chip, optical fiber input/output interface, electric signal CAN interface controller, wherein light
Path unit, electric pathway unit, control unit are Parallel Function unit, can according to practical application flexible configuration, light-path unit,
Electric pathway unit and control unit are one or more, and compatible multichannel extension.
The light-path unit is the access unit of optical fiber CAN, there is two interfaces of sending and receiving, can be directly from other CAN
TX, RX of controller are accessed after current to light inversion, can also be accessed from the light-path unit of other boards.
The electric pathway unit is the electric signal CAN interface of standard, can directly be docked with external electric signal CAN,
It generally requires after isolating chip is isolated for protection equipment again by CAN bus on its access board, is realized using electric signal more
The interconnection of light-path unit between a board reduces delay caused by photoelectric conversion compared to for serial optical fiber CAN network.
The control unit includes CPU and CAN controller two parts, it is logical with light-path unit, electricity in the present invention
Road unit is in par, is a kind of using access way.
The effect of impedance matching resistor is adjusting circuit impedance, and it is big that it should be moderately adjusted when external status changes greatly
It is small.
CAN bus enables the external multi-channel optical fibre CAN communication channel accessed directly to mount total herein on the plate
On line, CAN networking function is realized, CAN bus realizes optical splitter function, while compatible multi-channel optical fibre interface and electric signal on plate
Interface enables the external multi-channel optical fibre CAN communication channel accessed directly to mount in this bus, when there is multichannel light in region
When fine CAN communication access, the interconnection of multiple boards can be realized by CAN bus on plate, group builds up local area network type CAN bus,
Can according to actual needs flexible configuration light-path unit, electric pathway unit, control unit quantity and combination, it is more to adapt to
Kind application.
The present invention is equivalent to a CAN router, and the CAN device of identical standard can be directly accessed, with serial optical fiber CAN
Network is compared, and can reduce photoelectric conversion bring transmission delay, and have very strong flexibility and scalability.Wherein light-path
Unit, electric pathway unit, control unit are three expansible units；It in actual use should reasonable disposition three according to demand
The quantity of unit, it should be noted that entire unit is realized on circuit boards, and at least stay all the way electric pathway unit be extension
It is spare, if some nodes are communication switching effect, control unit can be not required to.
Interconnection between multiple local area network (LAN) CAN buses can also pass through the serial of electric pathway unit by light-path unit
Connection realizes, can flexible configuration light-path unit, electric pathway unit, the quantity of control unit and combination side according to actual needs
Formula, to adapt to various application occasions.
System topology of the invention can be divided into three levels:
First level is equipment access connection, and fiber plant and electric signal equipment can directly be connect by corresponding interface
Enter CAN network.
Fig. 4 show access unit (optical fiber CAN node) and is linked into the annexation figure of local area network (LAN) CAN unit.In connection
The TX of access unit is connected to the RX of local area network (LAN) CAN unit by optical fiber, equally connects the RX of access unit by optical fiber
To the TX of local area network (LAN) CAN unit, the network insertion of optical fiber CAN node is thus just realized.
Second level is multiple local area network (LAN) CAN unit composition CAN local area networks, is used for expansion interface, the company between unit
Recommendation is connect using electrical signal form, thus may be implemented all to access the CAN of certain area.
Fig. 5 show the local area network (LAN) CAN of multiple local area network (LAN) CAN unit compositions.When there are multiple CAN nodes in the part in network
When, the extension of node can be realized by multiple such methods.
Connection type 1 is that shielding line mode extends and (mother daughter board connector mode also may be selected to extend) in Fig. 5, connection type 2
For optical fiber solutions extension.The extension of connection type 1 will not generate network delay, and cost is relatively low.But when two local area network (LAN) CAN units
When being separately connected the equipment of different voltages grade, it is necessary to carry out isolation processing to two units, in this case connection side
Formula 2 is just at a kind of necessary means.Thus two kinds of connection types need to be selected according to the actual situation.
Third level is the connection between CAN local area network, if the two distance is farther out or its other party such as have high_voltage isolation
The requirement in face is recommended to connect using optical fiber.
Fig. 6 show the networking schematic diagram of local area network (LAN) CAN, and wherein local area network (LAN) CAN x is local area network (LAN) CAN shown in Fig. 5.
In view of the CAN node being closer can be attached by a local area network (LAN) CAN, so general different local area network
As shown in Figure 6 distance between CAN farther out, recommends to connect using optical fiber, i.e.,.But also it is considered as this specially according to shielded cable connection
Sharp protection scope.
Entire fiber optic local area network CAN network is finally formed by above several layers of connection relationships.
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part uses, for
For those skilled in the art, without departing from the concept of the premise of the invention, can also make it is several deformation and
It improves, these are all within the scope of protection of the present invention.
Claims (7)
1. a kind of fiber optic local area network CAN bus control device, it is characterised in that: including CAN bus on plate, CAN is total on the plate
One end of line connects control unit by control side electrical level transferring chip, and the other end of CAN bus passes through passage side level on plate
Conversion chip and isolating chip are connected separately with light-path unit and electric pathway unit, and the light-path unit has more than one
And be arranged in parallel, the control unit number is identical as light-path unit and is arranged in parallel；
The light-path unit is by driving circuit, the optical fiber output interface by TX interfacing path side electrical level transferring chip
With driving circuit, the optical fiber input interface composition by RX interfacing path side electrical level transferring chip；
The electric pathway unit is made of the electric signal CAN interface of two output ends of CANH and CANL of connection isolating chip；
The control unit controls the CPU+CAN controller group of side electrical level transferring chip by connecting by TX interface with RX interface
At；
CAN bus both ends are separately connected at least one control side electrical level transferring chip and at least one by impedance matching resistor on plate
A passage side electrical level transferring chip.
2. a kind of fiber optic local area network CAN bus control device according to claim 1, which is characterized in that the light is logical
The compatible multichannel extension of road unit, electric pathway unit and control unit.
3. a kind of optical fiber CAN node unit, which is characterized in that filled including local area network (LAN) CAN bus marco described in claim 1
It sets, further includes for accessing the optical fiber or electric signal equipment that have optical fiber input/output interface, the optical fiber or electric signal are set
For by the CPU+CAN of the driving circuit of connection optical fiber input/output interface, the TX/RX of connection driving circuit and connection TX/RX
Controller composition.
4. a kind of optical fiber CAN local area network is made of two local area network (LAN) CAN bus control device connections as described in claim 1.
5. a kind of optical fiber CAN local area network according to claim 4, which is characterized in that two local area network (LAN) CAN buses
Control device passes through the optical fiber connection between optical fiber input/output interface.
6. a kind of optical fiber CAN local area network according to claim 4, which is characterized in that two local area network (LAN) CAN buses
Control device passes through shielded cable or mother daughter board connector connection between electric signal CAN interface.
7. a kind of fiber optic local area network networking, which is characterized in that mutual by two optical fiber CAN local area networks as claimed in claim 4
It is formed by connecting, farther out or has between two or more CAN local area networks of high_voltage isolation requirement for realizing distance
Connection, two or more CAN local area networks are connected using optical fiber or shielded cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610772581.XA CN106375010B (en) | 2016-08-31 | 2016-08-31 | A kind of fiber optic local area network CAN bus control device and networking |
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| CN201610772581.XA CN106375010B (en) | 2016-08-31 | 2016-08-31 | A kind of fiber optic local area network CAN bus control device and networking |
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| CN106375010A CN106375010A (en) | 2017-02-01 |
| CN106375010B true CN106375010B (en) | 2019-01-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263706B2 (en) * | 2017-04-18 | 2019-04-16 | The Boeing Company | Single-fiber bidirectional controller area network bus |
| CN108242954B (en) * | 2017-12-14 | 2020-07-14 | 中国空间技术研究院 | Visible light communication system and method applied to spacecraft cabin data transmission |
| CN110519142A (en) * | 2019-08-27 | 2019-11-29 | 江苏沃姆克科技有限公司 | A kind of SF-CAN BUS filter |
| CN113411238B (en) * | 2020-03-16 | 2022-10-14 | 阿里巴巴集团控股有限公司 | CAN bus network access unit, related network, method and device |
| WO2022040999A1 (en) * | 2020-08-26 | 2022-03-03 | 深圳欣锐科技股份有限公司 | Isolation circuit and apparatus for controller area network communication |
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|---|---|---|---|---|
| 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 |
| WO2011037187A1 (en) * | 2009-09-24 | 2011-03-31 | 株式会社オートネットワーク技術研究所 | Vehicle-mounted communication system, optical communication harness, and optical distributor apparatus |
| CN102026050A (en) * | 2009-09-18 | 2011-04-20 | 华中科技大学 | Optical fiber CAN bus hub and networking method thereof |
| CN102904786A (en) * | 2011-07-27 | 2013-01-30 | 上海联影医疗科技有限公司 | Optical fiber CAN (controller area network) bus node unit and CAN bus topology thereof |
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- 2016-08-31 CN CN201610772581.XA patent/CN106375010B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102026050A (en) * | 2009-09-18 | 2011-04-20 | 华中科技大学 | Optical fiber CAN bus hub and networking method thereof |
| WO2011037187A1 (en) * | 2009-09-24 | 2011-03-31 | 株式会社オートネットワーク技術研究所 | Vehicle-mounted communication system, optical communication harness, and optical distributor apparatus |
| CN102904786A (en) * | 2011-07-27 | 2013-01-30 | 上海联影医疗科技有限公司 | Optical fiber CAN (controller area network) bus node unit and CAN bus topology thereof |
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