CN102437483B - Novel electrical continuous and fully shielded CAN (controller area network) bus connection method - Google Patents
Novel electrical continuous and fully shielded CAN (controller area network) bus connection method Download PDFInfo
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- CN102437483B CN102437483B CN201110272933.2A CN201110272933A CN102437483B CN 102437483 B CN102437483 B CN 102437483B CN 201110272933 A CN201110272933 A CN 201110272933A CN 102437483 B CN102437483 B CN 102437483B
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Abstract
The invention relates to a novel electrical continuous and fully shielded CAN (controller area network) bus connection method, belonging to a communication technology, in particular to an improvement of a bus connection method. The method is characterized in that a coaxial double-wire electrical connector (1) is adopted, CAN-H core wires of two CAN bus cables are connected with an internal contact coupler (core conductor) (5) in a plug of the coaxial double-wire electrical connector (1) and are also connected with an external contact coupler (outer conductor) (6) of the plug of the coaxial double-wire electrical connector (1), two CAN buses are inserted into a shielding tail clamp (2) of the plug of the coaxial double-wire electrical connector (1), a shielding sleeve is connected with the shielding tail clamp (2) of the plug through welding, the shielding tail clamp (2) is connected with a connector plug shell (3) through welding, and the plug shell (3) is connected with a shell of a device through a plug nut (4). The resistance of the CAN buses against electromagnetic interference can be improved greatly, and the reliability and security of a CAN bus network can be enhanced; and the constructed dual-redundant CAN bus network has a physical error prevention function.
Description
Technical field
The invention belongs to the communication technology, be specifically related to a kind of improvement of bus connecting method.
Background technology
At present, both at home and abroad the method for attachment of CAN bus is bus mode substantially, and minority has adopted the complete trails continuous mode that is electrically connected, and still, its connected mode has only solved to be electrically connected and continued the problem of equipment input, and other problem still exists, as shown in Figure 1.
In the circuit shown in Fig. 1, CAN bus cable is two hinge shielding conductors, in the CAN network of bus-type, bus backbone adopts bifurcated mode to be divided into two, and separates Yi Tiao branch and equipment connection, another continuation is as backbone, this bifurcation has destroyed the physics continuity of two hinge shielding conductors, and except affecting the electrical characteristic of heart yearn and the shield effectiveness of screen, also mechanical strength and the switching performances of shielding conductor are cut with scissors in impact pair, be the major failure point of bus, the situation of technique breakpoint similarly.
The existence of bus branch has a strong impact on the electric continuity of network, the branch of transmitting apparatus and the electric continuity of backbone are by holding resistance to guarantee, yet concerning the branch of receiving equipment, the electric continuity of backbone can only arrive bifurcation place, internal resistance due to circuitry in branch circuit very greatly (can not be very little, otherwise affect bus load), electric current in circuit is very little, when this electric current to a certain extent little, will cause electrical connection fault at the electric connector place of equipment, this fault is flickering, is one of principal element of bus network unstable operation.Meanwhile, the existence of branch circuit, will cause reflection to the communication waveforms of characteristic frequency, affects the stable of bus network work.
Equipment connector place in Fig. 1 (seeing the typical case in figure), shielding conductor, for access arrangement, must leave one section at least about the shielding short-term of 100mm, and the electromagnetism gap between this short-term and heart yearn seriously reduces the ability of the anti-electromagnetic interference of CAN bus.
Although recommended the connected mode of CAN bus and equipment in ARINC825 standard, as shown in Figure 2.
The core of this connected mode is the transit point of CAN bus to be placed on to the inside of equipment, and CAN-H and CAN-L transfer at device interior, and shielding conductor still passes through shielding short-term access arrangement, and is connected with apparatus casing.
This connected mode has guaranteed that the electric continuity of CAN bus backbone has arrived the electric connector input of equipment, has eliminated branch circuit and bifurcation.But at the electric connector place of equipment, increased a shielding short-term, the electromagnetism gap of CAN bus is doubled, meanwhile, still cannot eliminate the existence of technique breakpoint.
Summary of the invention
Object of the present invention: first, propose a kind of equipment end electric connector of new ideas, this connector can be realized at plug place the electric continuity of CAN-H and CAN-L, and eliminate the electromagnetism gap that shielding short-term causes, realize complete trails shielding; Secondly, propose a kind of new networking mode, eliminate technique breakpoint and bifurcation, improve the electrical characteristic of CAN bus and the manufacturability of cable processing.
Technical scheme of the present invention is: the continuous full-shield CAN bus connecting method of a kind of Novel electric, it is characterized in that, adopt a kind of coaxial-type two-wire electric connector 1, the CAN-H heart yearn of two CAN bus cables is connected to the interior contact even 5 of coaxial-type two-wire electric connector 1 plug, the CAN-L heart yearn of two CAN bus cables is connected to the outer contacting even 6 of coaxial-type two-wire electric connector 1 plug, two CAN buses are inserted to the shielding tail folder 2 of coaxial-type two-wire electric connector 1 plug, housing is connected with the shielding tail folder 2 of plug by welding, then shielding tail folder 2 adopts and is welded to connect with connector plug housing 3, plug casing 3 is connected with the housing of equipment by plug nut 4.
The housing of described CAN bus with the welding manner of shielding tail folder 2 is: two CAN bus cables insert shielding tail folder 2, along shielding tail, press from both sides 2 borders and be provided with some scolding tin hole, with the hot melt scolding tin of scolding tin sleeve pipe, the housing of two CAN buses and shielding tail are pressed from both sides to 2 border welding.
Described shielding tail folder 2 with connector plug housing 3 welding manners is: the front end of shielding tail folder 2 is inserted in connector shell 3, front end and connector shell 3 cross sections of shielding tail folder 2 are circular, along connector shell 3 borders, be provided with some scolding tin hole, with hot melt scolding tin front end border welding with shielding tail folder 2 by connector shell 3 of scolding tin sleeve pipe.
The cable of described CAN bus network and the wiring of other electrical cables separate, form separately a cable.
When described CAN bus is two remaining network, will in dual-redundancy CAN bus network, adopt respectively multi-form core conductor with the plug of equipment connection, wherein the interior contact of a bus occasionally adopts contact pin, the even jack that adopts of interior contact of another bus.
The cross section that described shielding tail presss from both sides 2 afterbodys is ellipsoid, holds two CAN bus cables, and radius is slightly larger than the radius of CAN bus cable.
The plug of described coaxial-type two-wire electric connector 1 comprises and holds the shielding tail folder 2 of two CAN bus cables, the interior contact even 5 that can connect two wires and outer contacting idol 6.
The cross section that described shielding tail presss from both sides 2 afterbodys is Long Circle, holds two CAN bus cables, and radius is slightly larger than the radius of CAN bus cable.
Beneficial effect of the present invention is: one of advantage of the present invention is: the electric continuity of CAN bus has been extended to the input of equipment electric connector, improved the electric property of CAN bus circuit, improved the reliability of CAN bus message transmission; Two of advantage is: housing and the apparatus casing of CAN bus cable are connected into one, the complete trails of having realized CAN bus circuit shields completely, do not stay any electromagnetism gap, external electromagnetic interference cannot be invaded inner CAN bus circuit, greatly improve the ability of the anti-electromagnetic interference of CAN bus, improved reliability and the fail safe of CAN bus network; Three of advantage is: connected mode of the present invention and networking mode, finally form independently CAN bus cable, thoroughly eliminate bus branch, bifurcation and technique breakpoint, both improved the manufacturability of cable processing, the electric property, reliability and the fail safe that have improved again CAN bus; Four of advantage is: electric connector core conductor adopts different type of attachment (as jack or contact pin), and constructed dual-redundancy CAN bus network has error-disable function physically.
Accompanying drawing explanation
Fig. 1 bus-type CAN network connection diagram
The CAN network connection diagram of Fig. 2 ARINC standard recommendation
Fig. 3 is electrically connected and continues full-shield CAN network connection diagram
Fig. 4 coaxial-type two-wire electric connector structure schematic diagram
Fig. 5 shields tail folder cross-sectional view
Wherein, 1-coaxial-type twin-core electric connector, 2-shielding tail folder, 3-connector shell, 4-plug nut, 5-core conductor, 6-outer conductor
Embodiment
Below by embodiment, the present invention is further illustrated:
Fig. 3 is shown in by CAN bus network connected mode schematic diagram of the present invention, and the structural representation of equipment CAN bus coaxial-type two-wire electric connector 1 plug is shown in Fig. 4 and Fig. 5.
As shown in Figure 3 and Figure 4, the CAN-H heart yearn of two CAN bus cables is connected to even (core conductor) 5 of interior contact of coaxial-type two-wire electric connector 1 plug, the CAN-L heart yearn of two CAN bus cables is connected to even (outer conductor) 6 of outer contacting of coaxial-type two-wire electric connector 1 plug, and the electric continuity of realizing CAN bus arrives the electrical connector plug place of equipment; The shielding tail folder 2 of plug covers the housing of CAN bus, and by welding, makes housing press from both sides 2 with the shielding tail of plug to be connected, then by plug nut 4, to be connected with the housing of equipment, thereby the complete trails of realizing whole CAN bus network shields; Whole CAN bus cable and other wiring are separated, and bunchy, adopts independently connector separately, is convenient to the manufacture of cable, eliminates the necessary technique breakpoint of Splices cable.
Structure and the wiring schematic diagram of coaxial-type two-wire electric connector 1 plug are shown in Fig. 4, plug place full-shield principle: two CAN bus cables insert shielding tail folder 2, along shielding tail, press from both sides 2 borders and be provided with some scolding tin hole, with the hot melt scolding tin of scolding tin sleeve pipe, the housing of two CAN buses and shielding tail are pressed from both sides to 2 border welding, form the electric continuation property between CAN bus housing and shielding tail folder 2, the afterbody cross section of shielding tail folder 2 is ellipsoid (seeing Fig. 5), and radius of circle is slightly larger than the radius of CAN bus; The front end of shielding tail folder 2 is inserted in connector shell 3, the front end of shielding tail folder 2 and the cross section of connector shell 3 are circular, along connector shell 3 borders, be provided with some scolding tin hole, hot melt scolding tin front end border welding with shielding tail folder 2 by connector shell 3 with scolding tin sleeve pipe, forms the electric continuation property between shielding tail folder 2 and connector shell 3; By tightening plug nut 4, connector shell 3 is connected with the housing of equipment; thereby realize the seamless link of whole CAN bus network complete trails; eliminate the electromagnetism gap of shielding short-term, effectively protected inner CAN-H and CAN-L heart yearn not to be subject to the interference of electromagnetic radiation.
As shown in Figure 4, core conductor in plug 5 is changed to jack by contact pin, the mistake proofing that can realize the CAN bus network of two remainings on same equipment connects, as: the plug core conductor 5 use contact pins (jack) of a bus, the plug core conductor 5 use jacks (contact pin) of another bus, guarantee that two buses can wrong physically.
As shown in Figure 5, the rear section of shielding tail folder 2 is pressed the design of ellipsoid hole, and the radius R in ellipsoid hole is slightly larger than the radius r of CAN bus cable used.Such configuration makes the outer housing of CAN bus cable and shielding tail press from both sides 2 close contacts, to guarantee to realize minimum electromagnetism gap and good welding procedure.
Claims (7)
1. the continuous full-shield CAN bus connecting method of Novel electric, it is characterized in that, adopt a kind of coaxial-type two-wire electric connector (1), the CAN-H heart yearn of two CAN bus cables is connected to the interior contact even (5) of coaxial-type two-wire electric connector (1) plug, the CAN-L heart yearn of two CAN bus cables is connected to the outer contacting even (6) of coaxial-type two-wire electric connector (1) plug, two CAN buses are inserted to the shielding tail folder (2) of coaxial-type two-wire electric connector (1) plug, housing is connected with the shielding tail folder (2) of plug by welding, then shielding tail folder (2) adopts and is welded to connect with connector plug housing (3), plug casing (3) is connected with the housing of equipment by plug nut (4).
2. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, it is characterized in that, the housing of described CAN bus with the welding manner of shielding tail folder (2) is: two CAN bus cables insert shielding tail folder (2), along shielding tail folder (2) border, be provided with some scolding tin hole, use the hot melt scolding tin of scolding tin sleeve pipe by the housing of two CAN buses and (2) border welding of shielding tail folder.
3. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, it is characterized in that, described shielding tail folder (2) with connector plug housing (3) welding manner is: the front end of shielding tail folder (2) is inserted in connector shell (3), the front end of shielding tail folder (2) and connector shell (3) cross section are circular, along connector shell (3) border, be provided with some scolding tin hole, with hot melt scolding tin front end border welding with shielding tail folder (2) by connector shell (3) of scolding tin sleeve pipe.
4. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, is characterized in that, the cable of described CAN bus network and the wiring of other electrical cables separate, form separately a cable.
5. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, it is characterized in that, when described CAN bus is two remaining network, to in dual-redundancy CAN bus network, adopt respectively multi-form interior contact occasionally with the plug of equipment connection, wherein the interior contact of a bus occasionally adopts contact pin, the even jack that adopts of interior contact of another bus.
6. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, is characterized in that, the cross section of described shielding tail folder (2) afterbody is ellipsoid, holds two CAN bus cables, and radius is slightly larger than the radius of CAN bus cable.
7. the continuous full-shield CAN bus connecting method of Novel electric according to claim 1, it is characterized in that, the plug of described coaxial-type two-wire electric connector (1) comprises that the shielding tail that holds two CAN bus cables presss from both sides (2), connect interior contact even (5) and the outer contacting even (6) of two wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110272933.2A CN102437483B (en) | 2011-09-14 | 2011-09-14 | Novel electrical continuous and fully shielded CAN (controller area network) bus connection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110272933.2A CN102437483B (en) | 2011-09-14 | 2011-09-14 | Novel electrical continuous and fully shielded CAN (controller area network) bus connection method |
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| Publication Number | Publication Date |
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| CN102437483A CN102437483A (en) | 2012-05-02 |
| CN102437483B true CN102437483B (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110272933.2A Active CN102437483B (en) | 2011-09-14 | 2011-09-14 | Novel electrical continuous and fully shielded CAN (controller area network) bus connection method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117494B (en) * | 2013-01-25 | 2015-04-01 | 中国航天时代电子公司 | Integration forming method for 1553B bus cable system |
| CN105751998A (en) * | 2016-03-10 | 2016-07-13 | 中国北方车辆研究所 | Vehicle can bus network matching device |
| CN110504600A (en) * | 2019-08-27 | 2019-11-26 | 北京机械设备研究所 | A kind of generalization attachment device and connection method based on bus architecture |
| CN110890674B (en) * | 2019-11-26 | 2021-08-20 | 中国船舶重工集团公司第七一九研究所 | Cable connector and connector socket matched with same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766040A (en) * | 1996-02-29 | 1998-06-16 | Telesafe As | Contact set for twisted pair cable with individually shielded pairs |
| CN101512848A (en) * | 2006-09-08 | 2009-08-19 | 西门子能量及自动化公司 | Devices and/or systems for coupling a PLC bus |
| CN101931140A (en) * | 2010-09-01 | 2010-12-29 | 大全电气有限公司 | Switch cabinet mask bus connecting device |
-
2011
- 2011-09-14 CN CN201110272933.2A patent/CN102437483B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766040A (en) * | 1996-02-29 | 1998-06-16 | Telesafe As | Contact set for twisted pair cable with individually shielded pairs |
| CN101512848A (en) * | 2006-09-08 | 2009-08-19 | 西门子能量及自动化公司 | Devices and/or systems for coupling a PLC bus |
| CN101931140A (en) * | 2010-09-01 | 2010-12-29 | 大全电气有限公司 | Switch cabinet mask bus connecting device |
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| CN102437483A (en) | 2012-05-02 |
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