CN205356376U - CAN bus wire harness connection structure - Google Patents
CAN bus wire harness connection structure Download PDFInfo
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- CN205356376U CN205356376U CN201620114008.5U CN201620114008U CN205356376U CN 205356376 U CN205356376 U CN 205356376U CN 201620114008 U CN201620114008 U CN 201620114008U CN 205356376 U CN205356376 U CN 205356376U
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Abstract
The utility model discloses a CAN bus wire harness connection structure, the first CAN high-order data terminal of its first CAN node connects CAN high-order data line through the first branch pencil, the first CAN low-order data terminal of the first CAN node connects CAN low-order data line through the second branch pencil; a second CAN high-bit data end of the second CAN node is directly connected to a CAN high-bit data line, and a second CAN low-bit data end of the second CAN node is directly connected to a CAN low-bit data line; and a third CAN high-bit data end of the third CAN node is connected with a CAN high-bit data line through a third branch wiring harness, and a third CAN low-bit data end of the third CAN node is connected with a CAN low-bit data line through a fourth branch wiring harness. The utility model discloses the reflection of reducible signal is disturbed, improves signal quality.
Description
Technical field
This utility model relates to automobile CAN (controller local area network, ControllerAreaNetwork) bus system technical field, in particular to a kind of CAN wire harness attachment structure.
Background technology
Development along with automotive electronic technology, the network-bus of automobile CAN-bus becomes increasingly complex, in vehicle CAN bus system, wire harness has two kinds, a kind of trunk wire harness being to connect two terminal resistances, it is additionally connect trunk wire harness and node branch wire harness, according to SAEJ1939-21CAN bus physical layer specification, trunk wire harness length should be not more than 40 meters, branch's wire harness length should be not more than 1 meter, the trunk wire harness length of current existing vehicle can meet completely, but branch's wire harness length is by the reason of arrangement, sometimes cannot meet requirement.
If CAN branch wire harness length exceedes setting, causing that CAN signal attenuation is excessive, and affect CAN communication, therefore CAN branch wire harness is more short, and CAN signal quality is more high.
Utility model content
The purpose of this utility model seeks to provide a kind of CAN wire harness attachment structure, and this apparatus structure is simple, easy to use, during for CAN branch wire harness more than 1 meter, can adopt this utility model, to reduce the reflection interference of signal, improves signal quality.
For realizing this purpose, a kind of CAN wire harness attachment structure designed by this utility model, it includes CAN high position data line, CAN low data line, a CAN node, the 2nd CAN node and the 3rd CAN node, wherein, oneth CAN high position data end of a described CAN node connects CAN high position data line by first branch's wire harness, and a CAN low data end of a CAN node connects CAN low data line by second branch's wire harness；
2nd CAN high position data end of described 2nd CAN node is directly accessed CAN high position data line, and the 2nd CAN low data end of the 2nd CAN node is directly accessed CAN low data line；
3rd CAN high position data end of described 3rd CAN node connects CAN high position data line by the 3rd branch's wire harness, and the 3rd CAN low data end of described 3rd CAN node connects CAN low data line by the 4th branch's wire harness；
The length of described first branch's wire harness, second branch's wire harness, the 3rd branch's wire harness and the 4th branch's wire harness is respectively less than equal to 1 meter.
2nd CAN high position data end junction of described CAN high position data line and the 2nd CAN node is that V-type is arranged, the 2nd CAN low data end junction of described CAN low data line and the 2nd CAN node is also arranged for V-type.
This utility model has at least three CAN nodes, each CAN node is equipped with CAN high position data end (CAN_H) and CAN low data end (CAN_L), when running into the position having and needing branch's wire harness more than 1 meter, CAN high position data end (CAN_H) and CAN low data end (CAN_L) of CAN node directly connects with corresponding CAN high position data line and CAN low data line, and the CAN high position data line of junction and CAN low data line adopt V-type to arrange, this arrangement form makes CAN high position data line and CAN low data line can replace branch's wire harness at this place, to reduce the reflection interference of signal, improve signal quality.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Wherein, 100 the oneth CAN nodes, 101 the oneth CAN high position data ends, 102 the oneth CAN low data ends, 111 first branch's wire harness, 122 second branch's wire harness, 200 the 2nd CAN nodes, 201 the 2nd CAN high position data ends, 202 the 2nd CAN low data ends, 300 the 3rd CAN nodes, 301 the 3rd CAN high position data ends, 302 the 3rd CAN low data ends, 311 the 3rd branch's wire harness, 322 the 4th branch's wire harness, 400 CAN high position data lines, 401 CAN low data lines, 500 the 4th CAN nodes, 501 the 4th CAN high position data ends, 502 the 4th CAN low data ends, 511 quintafurcation wire harness, 522 the 6th branch's wire harness.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
CAN wire harness attachment structure as shown in Figure 1, it includes CAN high position data line 400, CAN low data line the 401, the oneth CAN node the 100, the 2nd CAN node 200 and the 3rd CAN node 300, wherein, oneth CAN high position data end 101 of a described CAN node 100 connects CAN high position data line 400 by first branch's wire harness 111, and a CAN low data end 102 of a CAN node 100 connects CAN low data line 401 by second branch's wire harness 122；
2nd CAN high position data end 201 of described 2nd CAN node 200 is directly accessed CAN high position data line 400, and the 2nd CAN low data end 202 of the 2nd CAN node 200 is directly accessed CAN low data line 401；
3rd CAN high position data end 301 of described 3rd CAN node 300 connects CAN high position data line 400 by the 3rd branch's wire harness 311, and the 3rd CAN low data end 302 of described 3rd CAN node 300 connects CAN low data line 401 by the 4th branch's wire harness 322；
The length of described first branch's wire harness 111, second branch's wire harness the 122, the 3rd branch's wire harness 311 and the 4th branch's wire harness 322 is respectively less than equal to 1 meter；
2nd CAN high position data end 201 junction of described CAN high position data line 400 and the 2nd CAN node 200 is that V-type is arranged, 2nd CAN low data end 202 junction of described CAN low data line 401 and the 2nd CAN node 200 is also arranged for V-type, 2nd CAN high position data end 201 is positioned at the tip at CAN high position data line 400V type place, and the 2nd CAN low data end 202 is positioned at the tip at CAN low data line 401V type place.
The height of V-type data wire is more than 1 meter.If owing to arrangement reason the 2nd CAN node 200 arranges CAN branch wire harness, then CAN branch wire harness will be greater than 1 meter, signal transmission quality can be affected, CAN high position data line 400 herein and CAN low data line 401 are now designed as V-type arrange, so can meet the demand of arrangement, can make again to guarantee signal transmission quality.
In technique scheme, it also includes the 4th CAN node 500,4th CAN high position data end 501 of the 4th CAN node 500 connects CAN high position data line 400 by quintafurcation wire harness 511,4th CAN low data end 502 of the 4th CAN node 500 connects CAN low data line 401 by the 6th branch's wire harness 522, and the length of described quintafurcation wire harness 511 and the 6th branch's wire harness 522 is respectively less than equal to 1 meter.
In technique scheme, it also includes terminal resistance R1 and terminal resistance R2, terminal resistance R1 and terminal resistance R2 and is connected between CAN high position data line 400 and CAN low data line 401.
Described 2nd CAN node 200 and the 3rd CAN node 300 are between the first CAN node 100 and the 4th CAN node 500.
An above-mentioned CAN node 100 and the 4th CAN node are two terminal nodes, and the 2nd CAN node 200 and the 3rd CAN node 300 are nonterminal node.
This utility model device is simple, easy to use, during for CAN branch wire harness more than 1 meter, can adopt version of the present utility model, to reduce the reflection interference of signal, improves signal quality.
The content that this specification is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. a CAN wire harness attachment structure, it includes CAN high position data line (400), CAN low data line (401), oneth CAN node (100), 2nd CAN node (200) and the 3rd CAN node (300), wherein, oneth CAN high position data end (101) of a described CAN node (100) connects CAN high position data line (400) by first branch's wire harness (111), oneth CAN low data end (102) of the oneth CAN node (100) connects CAN low data line (401) by second branch's wire harness (122)；
2nd CAN high position data end (201) of described 2nd CAN node (200) is directly accessed CAN high position data line (400), and the 2nd CAN low data end (202) of the 2nd CAN node (200) is directly accessed CAN low data line (401)；
3rd CAN high position data end (301) of described 3rd CAN node (300) connects CAN high position data line (400), the 3rd CAN low data end (302) of described 3rd CAN node (300) by the 3rd branch's wire harness (311) and connects CAN low data line (401) by the 4th branch's wire harness (322)；
The length of described first branch's wire harness (111), second branch's wire harness (122), the 3rd branch's wire harness (311) and the 4th branch's wire harness (322) is respectively less than equal to 1 meter.
2. CAN wire harness attachment structure according to claim 1, it is characterized in that: the 2nd CAN high position data end (201) junction of described CAN high position data line (400) and the 2nd CAN node (200) is that V-type is arranged, 2nd CAN low data end (202) junction of described CAN low data line (401) and the 2nd CAN node (200) is also arranged for V-type, 2nd CAN high position data end (201) is positioned at the tip at CAN high position data line (400) V-type place, 2nd CAN low data end (202) is positioned at the tip at CAN low data line (401) V-type place.
3. CAN wire harness attachment structure according to claim 1, it is characterized in that: it also includes the 4th CAN node (500), 4th CAN high position data end (501) of the 4th CAN node (500) connects CAN high position data line (400) by quintafurcation wire harness (511), 4th CAN low data end (502) of the 4th CAN node (500) connects CAN low data line (401) by the 6th branch's wire harness (522), the length of described quintafurcation wire harness (511) and the 6th branch's wire harness (522) is respectively less than equal to 1 meter.
4. CAN wire harness attachment structure according to claim 1, it is characterized in that: it also includes terminal resistance R1 and terminal resistance R2, terminal resistance R1 and terminal resistance R2 and is connected between CAN high position data line (400) and CAN low data line (401).
5. CAN wire harness attachment structure according to claim 3, it is characterised in that: described 2nd CAN node (200) and the 3rd CAN node (300) are positioned between a CAN node (100) and the 4th CAN node (500).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114008.5U CN205356376U (en) | 2016-02-04 | 2016-02-04 | CAN bus wire harness connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114008.5U CN205356376U (en) | 2016-02-04 | 2016-02-04 | CAN bus wire harness connection structure |
Publications (1)
| Publication Number | Publication Date |
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| CN205356376U true CN205356376U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620114008.5U Active CN205356376U (en) | 2016-02-04 | 2016-02-04 | CAN bus wire harness connection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301115A (en) * | 2016-12-14 | 2019-10-01 | 罗伯特·博世有限公司 | Subscriber station for bus system and the method for the data transmission in bus system |
-
2016
- 2016-02-04 CN CN201620114008.5U patent/CN205356376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301115A (en) * | 2016-12-14 | 2019-10-01 | 罗伯特·博世有限公司 | Subscriber station for bus system and the method for the data transmission in bus system |
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