CN110519142A - A kind of SF-CAN BUS filter - Google Patents
A kind of SF-CAN BUS filter Download PDFInfo
- Publication number
- CN110519142A CN110519142A CN201910794792.7A CN201910794792A CN110519142A CN 110519142 A CN110519142 A CN 110519142A CN 201910794792 A CN201910794792 A CN 201910794792A CN 110519142 A CN110519142 A CN 110519142A
- Authority
- CN
- China
- Prior art keywords
- module
- optical fiber
- switch module
- bus filter
- shielding
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000013307 optical fiber Substances 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000002955 isolation Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of filters, and in particular to a kind of SF-CAN BUS filter, including CAN module, switch module, power module；Wherein CAN module includes CAN transmitting module and CAN receiving module, and there are two line ports for CAN transmitting module, CAN receiving module: CANH, CANL, two groups of ports CANH and the port CANL are coupled on the corresponding port D89；Switch module includes switch module K1 and switch module K2, for carrying out impedance matching to input, output loop；Power module is connected with CAN transmitting module, is in series with feedthrough capacitor and inductance between power module and CAN receiving module.Power filter and CAN bus transmission signal are combined together by the present invention, meet the interference signal on CAN bus transmission signal, effectively isolation power supply.
Description
Technical field
The present invention relates to a kind of filters, and in particular to a kind of SF-CAN BUS filter.
Background technique
CAN is the abbreviation of controller local area network, is one of most widely used fieldbus in the world.CAN bus tool
Have the characteristics that the reliable real-time of transmission is high, transmission range can farthest arrive 10KM, and transmission rate highest can arrive 1MHz bps；It is single
Bus can at most connect 110 nodes, and can convenient expanding node number；Meanwhile CAN bus is multi-main construction, each node
It is equal, facilitate region networking, the utilization rate of bus is high, and the high-performance and reliability of CAN is accepted, and is widely answered
For industrial automation, ship, Medical Devices, industrial equipment etc..CAN module be a intelligent electric-controlled equipment, it can be achieved that
Electric control gear regional network control system.CAN module is able to achieve interconnection of the CAN bus equipment on optical fiber, support it is point-to-point,
Point-to-multipoint relaying and looped network working method, optical fiber interface are FC interface.It, can be in thunder due to using optical fiber as transmission medium
Electricity is surged, safety, high speed, long haul communication under the severe industrial environment such as electromagnetic interference；It eliminates simultaneously and originally uses copper wire
When thunder and lightning surge and protect the investment of equipment.When the transmission data of general CAN bus, CAN module, and requirement pair are used
CAN module power supply, interference signal will come in from power supply line, and then influence follow-up equipment.
Summary of the invention
The invention solves supply when the transmission of CAN bus signal the interference problem of CAN module, including CAN module equipment
Electrical interference；The function of CAN module can be made effectively to be combined with the function of filter simultaneously.For achieving the above object, of the invention
It is proposed a kind of SF-CAN BUS filter, specific technical solution is as follows: a kind of SF-CAN BUS filter, including CAN module, open
Close module, power module；Wherein CAN module outputting and inputting for user's CAN signal, including CAN transmitting module and CAN connect
Module is received, there are two line ports for CAN transmitting module, CAN receiving module: CANH, CANL, two groups of ports CANH and the end CANL
Mouth is coupled on the corresponding port D89；Switch module includes switch module K1 and switch module K2, switch module K1 and CAN
Transmitting module series connection, for carrying out impedance matching to input loop, switch module K2 connects with CAN receiving module, for defeated
Loop carries out impedance matching out；Power module is connected with CAN transmitting module, is in series between power module and CAN receiving module
Feedthrough capacitor and inductance.
Further, the invention also includes optical fiber shielding interface, optical fiber is single mode optical fiber, and does shielding processing to optical fiber,
I.e. optical fiber is wrapped with shielding iron pipe.
Further, the port above-mentioned switch module K2, DB9 is wrapped up in surrounding silk screen or copper mesh, prevent external signal into
Enter.
Further, inductance is in series between above-mentioned CAN receiving module and output end DB9 interface.
Further, above-mentioned shielding iron pipe internal diameter aperture, outer diameter is screw thread, and optical fiber is passed through from inner hole, shields iron pipe two
End nut, plain washer, silk screen washer tighten fixation.
The present invention by power filter and CAN bus transmission signal be combined together, meet CAN bus transmission signal, effectively
Completely cut off the interference signal on power supply.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention.
Fig. 2 is scheme of installation of the invention.
Specific embodiment
Carry out the present invention is described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, the present invention is a kind of SF-CAN BUS filter, including CAN module, switch module, power module；
Wherein CAN module outputting and inputting for user's CAN signal, including CAN transmitting module and CAN receiving module, CAN emit mould
There are two line ports for block, CAN receiving module: CANH, CANL, two groups of ports CANH and the port CANL are coupled with corresponding
On the port D89, DB9 has 9 pins, optional two pins connection, but the pin of input terminal and output end must correspond；It opens
Closing module includes switch module K1 and switch module K2, and the switch module K1 connects with CAN transmitting module, and switch module K1 has
Both of which: 0 and 1, for carrying out impedance matching to input loop, switch module K2 connects with CAN receiving module, switch module
There are two types of modes by K2: 0 and 1, for carrying out impedance matching to output loop；Power module is connected with CAN transmitting module, power supply mould
Feedthrough capacitor C1 and inductance L2 are in series between block and CAN receiving module.
As the preferred embodiment of the present invention, the invention also includes optical fiber shielding interface, optical fiber is single mode optical fiber, and to light
Fibre does shielding processing, i.e. optical fiber is wrapped with shielding iron pipe, shields the aperture of iron pipe internal diameter, outer diameter is screw thread, and optical fiber is from inner hole
It passes through, shielding iron pipe both ends nut, plain washer, silk screen washer tighten fixation, play the shielding action of signal.
As the preferred embodiment of the present invention, the port switch module K2, DB9 in the present invention is in surrounding silk screen or copper mesh
Package, prevents external signal from entering, and carries out shielding processing.
As the preferred embodiment of the present invention, it is in series between the CAN receiving module and output end DB9 interface in the present invention
Inductance L1.
Further, above-mentioned CAN module needs power module to power, use condition 5VDC, so power module needs
Alternating current 220VAC is switched into 5VDC, directly connects 5VDC for CAN transmitting module, for CAN receiving module needs pair
Power supply carries out special shielding processing.
As shown in Fig. 2, the present invention is during installation, SF-CAN BUS filter is fixed by bolts to the wall in barricade or darkroom
On face, silk screen washer is installed between bolt and fixation hole additional.Shielding iron pipe is mounted on the partition of filter internal, for completely cutting off filter
Interference signal outside wave device storehouse is entered in filter storehouse by optic fibre hole, is shielded and is added plain washer, mesh pad between iron pipe and nut
Circle shields interference signal.
Claims (5)
1. a kind of SF-CAN BUS filter, which is characterized in that including CAN module, switch module, power module；The CAN mould
Block is output and input for user's CAN signal, including CAN transmitting module and CAN receiving module, the CAN transmitting module,
There are two line ports for CAN receiving module: CANH, CANL, two groups of ports CANH and the port CANL are coupled with corresponding D89
On port；The switch module includes switch module K1 and switch module K2, the switch module K1 and CAN transmitting module string
Connection, for carrying out impedance matching to input loop, the switch module K2 connects with CAN receiving module, for output loop
Carry out impedance matching；The power module is connected with CAN transmitting module, is connected between the power module and CAN receiving module
There are feedthrough capacitor and inductance.
2. SF-CAN BUS filter as described in claim 1, which is characterized in that further include optical fiber shielding interface, the light
Fibre is single mode optical fiber, and does shielding processing to optical fiber, i.e. optical fiber is wrapped with shielding iron pipe.
3. SF-CAN BUS filter as described in claim 1, which is characterized in that the port described switch module K2, DB9 is four
All silk screens or copper mesh package, prevent external signal from entering.
4. SF-CAN BUS filter as described in claim 1, which is characterized in that the CAN receiving module and output end DB9
Inductance is in series between interface.
5. SF-CAN BUS filter as claimed in claim 2, which is characterized in that the shielding iron pipe internal diameter aperture, outer diameter
For screw thread, optical fiber is passed through from inner hole, and shielding iron pipe both ends nut, plain washer, silk screen washer tighten fixation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910794792.7A CN110519142A (en) | 2019-08-27 | 2019-08-27 | A kind of SF-CAN BUS filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910794792.7A CN110519142A (en) | 2019-08-27 | 2019-08-27 | A kind of SF-CAN BUS filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110519142A true CN110519142A (en) | 2019-11-29 |
Family
ID=68625374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910794792.7A Pending CN110519142A (en) | 2019-08-27 | 2019-08-27 | A kind of SF-CAN BUS filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110519142A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731754A (en) * | 2005-08-26 | 2006-02-08 | 清华大学 | A high-performance optical fiber CAN communication system suitable for strong electromagnetic interference environment |
| CN202602676U (en) * | 2012-03-29 | 2012-12-12 | 艾默生网络能源有限公司 | A CAN signal transmission circuit |
| CN106375010A (en) * | 2016-08-31 | 2017-02-01 | 中国船舶重工集团公司第七〇二研究所 | Apparatus for controlling CAN bus of optical fiber local area network and application thereof |
| CN207408939U (en) * | 2017-09-12 | 2018-05-25 | 新华三技术有限公司 | Bus impedance coalignment, node device and bus system |
| CN208063209U (en) * | 2018-04-20 | 2018-11-06 | 江苏达实久信医疗科技有限公司 | A kind of CAN fibre optic repeaters device |
| CN210405349U (en) * | 2019-08-27 | 2020-04-24 | 江苏沃姆克科技有限公司 | SF-CAN BUS filter |
-
2019
- 2019-08-27 CN CN201910794792.7A patent/CN110519142A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731754A (en) * | 2005-08-26 | 2006-02-08 | 清华大学 | A high-performance optical fiber CAN communication system suitable for strong electromagnetic interference environment |
| CN202602676U (en) * | 2012-03-29 | 2012-12-12 | 艾默生网络能源有限公司 | A CAN signal transmission circuit |
| CN106375010A (en) * | 2016-08-31 | 2017-02-01 | 中国船舶重工集团公司第七〇二研究所 | Apparatus for controlling CAN bus of optical fiber local area network and application thereof |
| CN207408939U (en) * | 2017-09-12 | 2018-05-25 | 新华三技术有限公司 | Bus impedance coalignment, node device and bus system |
| CN208063209U (en) * | 2018-04-20 | 2018-11-06 | 江苏达实久信医疗科技有限公司 | A kind of CAN fibre optic repeaters device |
| CN210405349U (en) * | 2019-08-27 | 2020-04-24 | 江苏沃姆克科技有限公司 | SF-CAN BUS filter |
Non-Patent Citations (1)
| Title |
|---|
| 李锐;蔡涛;段善旭;史晏君;胡国珍;: "模块化直流电源系统CAN网络的设计与实现" * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20191129 |