CN201541271U - Partial bus node automatic recovery device - Google Patents
Partial bus node automatic recovery device Download PDFInfo
- Publication number
- CN201541271U CN201541271U CN200920067448XU CN200920067448U CN201541271U CN 201541271 U CN201541271 U CN 201541271U CN 200920067448X U CN200920067448X U CN 200920067448XU CN 200920067448 U CN200920067448 U CN 200920067448U CN 201541271 U CN201541271 U CN 201541271U
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- bus
- node
- recovery device
- automatic recovery
- nodes
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- 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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Abstract
The utility model relates to a partial bus node automatic recovery device which comprises a CAN bus verification signal transmitter and a plurality of CAN nodes, and is characterized in that: a CAN bus is also connected with a verification signal transmitter and a reply signal receiver can transmit verification signals to the CAN nodes and receive reply signals returned by the CAN codes in normal operation; and the CAN bus is restored automatically according to the condition of the received reply signals. The utility model aims at providing a device which can provide an effective method for solving the circuit break of the CAN bus and conduct breakpoint confirmation and automatic recovery, has simple structure and low cost, and also can test the condition of bad contact of terminals. Furthermore, the communication function of codes can not be affected.
Description
Technical field
The utility model relates to the technical field of CAN bus communication, specifically a kind of automatic recovery device of partial bus node
Background technology
Controller area network network CAN (Controller Area Network) bus belongs to the category of fieldbus, and it is for solving a kind of serial data communication agreement that control numerous in the Hyundai Motor and the exchanges data between the tester are developed.The CAN bus has high real-time and reliability, has obtained using widely in industry spot.Be that a kind of framework is open, the new generation network communication technology of broadcast type.The CAN bus system adopts direct-connected mode, and the device level method for diagnosing faults not only is provided, and has improved the interchangeability of communication efficiency and equipment.CAN is the serial communication network of distributed control of a kind of effective support or real-time control.The dcs that appears as of this communication network realizes that real-time between each node, data communication reliably provides powerful technical support.But because the rising of the continuous complicated and system scale of the applied Control Network structure of CAN.
The data communication of CAN bus has outstanding reliability, real-time and flexibility.It is present unique fieldbus that international standard is arranged, can realize full distributed multimachine system, adopt non-destructive bus arbitration technology, can satisfy different real-time requirements, communication distance can reach 10km (transfer rate is 5kb/s) farthest, and communication speed reaches as high as 1Mb/s (transmission range is 40m); The node number can reach 110, and transmission medium is twisted-pair feeder or optical fiber, and message adopts short frame structure, has CRC check and other error detection measures, makes the data error rate extremely low, and reliability is high.The CAN bus is with its remarkable characteristic, cheap price, and high reliability and structure flexibly have been acknowledged as one of the most promising fieldbus.
Summary of the invention
The purpose of this utility model provides a kind of effective ways of the CAN of solution bus broken circuit, can carry out the device that breakpoint is confirmed and recovered automatically, and does not influence the communication function of node.
For achieving the above object, the utility model has adopted following technical scheme:
Automatic recovery device of partial bus node, comprise terminal resistance and a plurality of CAN nodes that are connected on the CAN bus high-low level holding wire, it is characterized in that: also be connected with validation signal reflector, answer signal receiver on the CAN bus, described validation signal reflector, answer signal receiver, it can send validation signal and receive the answer signal that CAN node operate as normal is returned to the CAN node; Its feature comprises that also described CAN node comprises CAN bus transceiver, MCU and controlled node restorer, and they connect by holding wire.
Described CAN bus verification signal transceiver, answer signal receiver constantly send validation signal determining its whether operate as normal to each CAN node, and the answer signal of returning when receiving its operate as normal;
All comprise controlled connector and additional resistance in the described plurality of nodes restorer, wherein controlled connector can be connected to additional resistance on the CAN bus;
Described controlled connector is made up of relay and single-pole double-throw switch (SPDT).
The beneficial effects of the utility model are embodied in:
1, can recover automatically opening circuit in the CAN bus, make the equipment operate as normal;
2, can realize the recovery that the CAN single channel opens circuit and two-way opens circuit simultaneously, operation need not have a power failure;
3, can check out out of order CAN node.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of node restorer among Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
A kind of automatic recovery device of partial bus node as shown in Figure 1, mainly comprise CAN bus verification signal transceiver, answer signal receiver 1, several CAN nodes 2, they all are connected on the high-low level holding wire of CAN bus 4 by holding wire, terminal resistance 3, node restorer 5; Described CAN bus verification signal transceiver, answer signal receiver 1 constantly send validation signal determining its whether operate as normal to each CAN node, and the answer signal of returning when receiving its operate as normal; Described node restorer 5 comprises controlled connector 6 and additional resistance 7, and wherein controlled connector 6 can connect the CAN bus to additional resistance and couple together; Comprise microprocessor (MPU), CAN bus transceiver in the node 3, they connect by the high-low level holding wire of CAN bus;
When opening circuit, the answer signal situation that described CAN bus verification signal projector, answer signal receiver 1 receive will change: if still can receive signal, but there is the answer signal of part can not receive, can illustrate it is the problem that is connected with of CAN node and bus, only need part of nodes is handled; If can not receive reply message, then illustrate between CAN node and the CAN node or open circuit in the tail end somewhere, node restorer 5 is connected to additional resistance 7 the CAN bus successively from the 1st CAN node; If node restorer 5 is when being connected the additional resistance 7 in n the node restorer 5 with the CAN bus, answer signal can both normally be accepted and return to the preceding CAN node of n, and when connecting n+1 can not, then can judge and open circuit between n and n+1 node; Then node restorer 5 genuine single-pole double-throw switch (SPDT)s 8 are controlled by relay 9, the additional resistance in n the node restorer 57 is replaced terminal resistance 3 be connected in the CAN bus, n CAN node operate as normal before making.
Claims (4)
1. portion C AN node automatic recovery device, comprise terminal resistance and a plurality of CAN nodes that are connected on the CAN bus high-low level holding wire, it is characterized in that: also be connected with validation signal reflector, answer signal receiver on the CAN bus, described validation signal reflector, answer signal receiver can send validation signal and receive the answer signal that CAN node operate as normal is returned to the CAN node.
2. portion C AN node automatic recovery device according to claim 1 is characterized in that: CAN bus transceiver, MCU and controlled node recovery device, they connect by holding wire.
3. portion C AN node automatic recovery device according to claim 1 is characterized in that: described node recovery device is made up of controlled connector and additional resistance.
4. portion C AN node automatic recovery device according to claim 3 is characterized in that: described controlled connector is made up of relay and single-pole double-throw switch (SPDT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920067448XU CN201541271U (en) | 2009-02-02 | 2009-02-02 | Partial bus node automatic recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920067448XU CN201541271U (en) | 2009-02-02 | 2009-02-02 | Partial bus node automatic recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541271U true CN201541271U (en) | 2010-08-04 |
Family
ID=42592721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920067448XU Expired - Fee Related CN201541271U (en) | 2009-02-02 | 2009-02-02 | Partial bus node automatic recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541271U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387059A (en) * | 2011-10-25 | 2012-03-21 | 中国西电电气股份有限公司 | Method and device for carrying out automatic matching on field bus terminals |
| CN103770728A (en) * | 2012-10-23 | 2014-05-07 | 广州汽车集团股份有限公司 | Communication circuit for electric vehicle based on CAN bus |
| CN105629902A (en) * | 2014-10-31 | 2016-06-01 | 北京精密机电控制设备研究所 | CAN bus accurate timing and assembly line testing communication system and method |
-
2009
- 2009-02-02 CN CN200920067448XU patent/CN201541271U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387059A (en) * | 2011-10-25 | 2012-03-21 | 中国西电电气股份有限公司 | Method and device for carrying out automatic matching on field bus terminals |
| CN103770728A (en) * | 2012-10-23 | 2014-05-07 | 广州汽车集团股份有限公司 | Communication circuit for electric vehicle based on CAN bus |
| CN103770728B (en) * | 2012-10-23 | 2016-04-27 | 广州汽车集团股份有限公司 | Based on the communicating circuit used for electric vehicle of CAN |
| CN105629902A (en) * | 2014-10-31 | 2016-06-01 | 北京精密机电控制设备研究所 | CAN bus accurate timing and assembly line testing communication system and method |
| CN105629902B (en) * | 2014-10-31 | 2019-05-17 | 北京精密机电控制设备研究所 | A kind of communication system of CAN bus accurate timing and assembly line test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: SHANGHAI HUAWEI AT Co., Ltd. Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20130202 |