CN111884865B - Vehicle bus problem point detection equipment and detection method thereof - Google Patents
Vehicle bus problem point detection equipment and detection method thereof Download PDFInfo
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- CN111884865B CN111884865B CN202010773003.4A CN202010773003A CN111884865B CN 111884865 B CN111884865 B CN 111884865B CN 202010773003 A CN202010773003 A CN 202010773003A CN 111884865 B CN111884865 B CN 111884865B
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 101150008604 CAN1 gene Proteins 0.000 description 5
- 101150063504 CAN2 gene Proteins 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- MLYYVTUWGNIJIB-BXKDBHETSA-N cefazolin Chemical compound S1C(C)=NN=C1SCC1=C(C(O)=O)N2C(=O)[C@@H](NC(=O)CN3N=NN=C3)[C@H]2SC1 MLYYVTUWGNIJIB-BXKDBHETSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
Classifications
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- 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
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
- H04L12/40182—Flexible bus arrangements involving redundancy by using a plurality of communication lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
-
- 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
-
- 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
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
Abstract
The application discloses a vehicle bus problem point detection device and a detection method thereof, wherein the device comprises a microprocessor and two mutually independent CAN channels connected with the microprocessor, and the two CAN channels are connected to the relative middle position of a CAN network backbone network to divide a bus into 2 independent CAN network loops; each channel of the CAN comprises a CAN transceiver and a terminal resistor configuration circuit, wherein the terminal resistor configuration circuit is provided with a plurality of resistors with different grades for configuration. The device of the application divides the bus into 2 independent CAN network loops through the relative middle position of the access CAN network backbone network, is convenient for users to divide the network, and gradually locates the fault point position by dividing the network layer by layer. The application can efficiently locate the problem points and does not affect the original functions of the vehicle.
Description
Technical Field
The application relates to the field of whole vehicle control equipment, in particular to equipment and a method for detecting problem points of a vehicle bus.
Background
The CAN bus belongs to a shared network, any ECU abnormality in the network is likely to influence the whole CAN network communication, and the existing equipment CAN only monitor the abnormal state of the network, but cannot accurately locate the abnormal position of the network problem point. How to efficiently locate problem points without affecting the original functions of the vehicle becomes a main problem to be solved in the current research.
Disclosure of Invention
The application aims to provide vehicle bus problem point detection equipment and a detection method thereof.
The technical scheme adopted by the application is as follows:
a vehicle bus problem point detection device comprises a microprocessor and two mutually independent CAN channels connected with the microprocessor, wherein the two CAN channels are connected to the relative middle position of a CAN network backbone network to divide a bus into 2 independent CAN network loops; each channel of the CAN comprises a CAN transceiver and a terminal resistor configuration circuit, wherein the terminal resistor configuration circuit is provided with a plurality of resistors with different grades for configuration.
Further, the different resistances of the termination resistance configuration circuit are 120Ω, 60Ω, and 4.4kΩ, respectively.
Further, the working mode of the detection equipment has the characteristics of full message routing and fault isolation; error frames of two paths of CAN channels of the detection equipment are isolated from each other, and no routing is performed; after the detection equipment is powered on, routing all messages received by one CAN channel to the other CAN channel within 5 ms; meanwhile, the other CAN channel routes all messages received by the other CAN channel to one CAN channel within 5 ms.
Further, the terminal resistor configuration circuit is configured into a resistor of any grade through an external regulating switch.
Further, the termination resistance configuration circuit configures the resistances of the corresponding stages according to the different initial termination resistances of the corresponding independent CAN network loops.
Further, the detection device also comprises a power chip, and the power chip respectively supplies power for the microprocessor and the two paths of CAN transceivers.
Further, the detection device has a metal shielding case, effectively blocking external EMC interference.
The application also discloses a detection method of the vehicle bus problem point detection device, which comprises the following steps:
step 1, connecting detection equipment into a relative middle position of a CAN network backbone network to be detected, and dividing a bus into 2 independent CAN network loops;
step 2, configuring a terminal resistor configuration circuit of each path of CAN channel into a resistor of a corresponding gear according to a CAN network backbone network;
step 3, the vehicle is adjusted to be in a fault working condition, and normal message signal sending and receiving are carried out;
step 4, capturing message waveforms of 2 independent CAN network loops by using an oscilloscope, and determining the CAN network loops with interference;
step 5, judging whether the CAN network loop with the interference CAN be continuously segmented; if yes, continuing to divide the CAN network loop with the interference by using the detection equipment and executing the step 2; otherwise, locating and finding out the abnormal ECU and ending the detection.
Further, in step 2, the terminal resistance configuration circuit is correspondingly configured according to the terminal resistances of the 2 independent CAN network loops.
Further, the fault conditions include various fault conditions such as engine start-up and air conditioning on.
By adopting the technical scheme, the application is provided with 2 CAN channels, and the 2 CAN channels are mutually independent and do not interfere with each other. Each path of CAN channel is provided with a terminal resistor configuration circuit, and CAN terminal resistors CAN be respectively set as follows through an external regulating switch: 120 Ω, 60 Ω, 4.4kΩ; the purpose is to independently match CAN terminal resistances of respective loops in the process of corresponding follow-up problem point investigation). The equipment provided by the application adopts the metal shielding shell, so that external EMC interference can be effectively blocked. The device of the application divides the bus into 2 independent CAN network loops through the relative middle position of the access CAN network backbone network, is convenient for users to divide the network, and gradually locates the fault point position by dividing the network layer by layer. The application can efficiently locate the problem points and does not affect the original functions of the vehicle.
Drawings
The application is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a vehicle bus problem point detection device according to the present application;
FIG. 2 is a schematic topology diagram of a typical single-path CAN network;
FIG. 3 is a schematic diagram showing a usage state of a vehicle bus problem point detection device connected to a CAN network according to the application;
fig. 4 is a second schematic view of a usage state of the vehicle bus problem point detection device of the present application accessing the CAN network.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
As shown in one of fig. 1 to 4, the application discloses a vehicle bus problem point detection device, which comprises a microprocessor and two mutually independent CAN channels connected with the microprocessor, wherein the two CAN channels are connected to the relative middle position of a CAN network backbone network to divide a bus into 2 independent CAN network loops; each channel of the CAN comprises a CAN transceiver and a terminal resistor configuration circuit, wherein the terminal resistor configuration circuit is provided with a plurality of resistors with different grades for configuration.
Further, the different resistances of the termination resistance configuration circuit are 120Ω, 60Ω, and 4.4kΩ, respectively.
Further, the working mode of the detection equipment has the characteristics of full message routing and fault isolation; error frames of two paths of CAN channels of the detection equipment are isolated from each other, and no routing is performed; after the detection equipment is powered on, routing all messages received by one CAN channel to the other CAN channel within 5 ms; meanwhile, the other CAN channel routes all messages received by the other CAN channel to one CAN channel within 5 ms.
Further, the terminal resistor configuration circuit is configured into a resistor of any grade through an external regulating switch.
Further, the termination resistance configuration circuit configures the resistances of the corresponding stages according to the different initial termination resistances of the corresponding independent CAN network loops.
Further, the detection device also comprises a power chip, and the power chip respectively supplies power for the microprocessor and the two paths of CAN transceivers.
Further, the detection device has a metal shielding case, effectively blocking external EMC interference.
The application also discloses a detection method of the vehicle bus problem point detection device, which comprises the following steps:
step 1, connecting detection equipment into a relative middle position of a CAN network backbone network to be detected, and dividing a bus into 2 independent CAN network loops;
step 2, configuring a terminal resistor configuration circuit of each path of CAN channel into a resistor of a corresponding gear according to a CAN network backbone network;
step 3, the vehicle is adjusted to be in a fault working condition, and normal message signal sending and receiving are carried out;
step 4, capturing message waveforms of 2 independent CAN network loops by using an oscilloscope, and determining the CAN network loops with interference;
step 5, judging whether the CAN network loop with the interference CAN be continuously segmented; if yes, continuing to divide the CAN network loop with the interference by using the detection equipment and executing the step 2; otherwise, locating and finding out the abnormal ECU and ending the detection.
Further, in step 2, the terminal resistance configuration circuit is correspondingly configured according to the terminal resistances of the 2 independent CAN network loops.
Further, the fault conditions include various fault conditions such as engine start-up and air conditioning on.
The specific working principle of the application is described in detail below:
specifically, the device provided by the application is provided with 2 paths of CAN channels, and the 2 paths of CAN channels are mutually independent and mutually noninterfere. Each path of CAN channel is provided with a terminal resistor configuration circuit, and CAN terminal resistors CAN be respectively set as follows through an external regulating switch: 120 Ω, 60 Ω, 4.4kΩ; the purpose is to independently match CAN terminal resistances of respective loops in the process of corresponding follow-up problem point investigation). The equipment provided by the application adopts the metal shielding shell, so that external EMC interference can be effectively blocked. The device has the following characteristics: (1) full message routing: after the equipment is electrified, all messages received by the CAN1 channel CAN be routed to the CAN2 within 5ms, and meanwhile, all messages received by the CAN2 channel CAN be routed to the CAN1 within 5 ms; (2) fault isolation: the error frames of the CAN1 and CAN2 channels are isolated from each other and are not routed.
As shown in fig. 2, a typical topology of a single-path CAN network, ECU a/B acts as CAN network termination nodes (equipped with 120 Ω termination resistances, respectively). When the bus is abnormally interfered (identified by an oscilloscope), the bus is a shared network, so that an interference source can be a certain ECU (electronic control unit) or EMC interference from a certain section of wire harness. At this time, if there is interference after the electric door of the vehicle is powered on, the ECU may be pulled out one by one to locate the problem, but if the vehicle is in some working modes (such as after the air conditioner is turned on), the interference occurs, and at this time, the ECU may be pulled out to cause the problem that the relevant functions are turned off and cannot be located. In this case, the apparatus of the present application can be used to locate the problem point, and the specific steps for detecting using the apparatus of the present application are as follows:
(1) when a fault occurs, the equipment is accessed to the relative middle position of the CAN network backbone network; as shown in fig. 3, X represents a device, dividing the bus into 2 independent CAN networks; as shown in fig. 3, the CAN1 network composed of ACEFX and the CAN2 network composed of BGDX);
(2) the termination resistance of the CAN 1/2 channel equipped with device X1 is 120Ω, since the 2 CAN networks have one termination resistance each;
(3) adjusting the vehicle to a fault condition, such as starting an engine, and opening an air conditioner; at this time, for the ABCDEFG ECU, all the transmitted and received message signals are normal, so that the functions are not affected;
(4) grabbing CAN 1/2 report Wen Boxing by an oscilloscope, and confirming which loop has interference; assuming that CAN1 of ACEF has also interference, CAN2 has no anomalies;
(5) as shown in fig. 4, the device X2 may be applied to continue to split the network at this time, or as another embodiment, X1 may be removed, the network may be restored, and the device may be placed at the location of the X2 device, and the vehicle may be adjusted to a failure condition, and the location may be an AE network problem or a CF network problem until an abnormal ECU is found.
By adopting the technical scheme, the application is provided with 2 CAN channels, and the 2 CAN channels are mutually independent and do not interfere with each other. Each path of CAN channel is provided with a terminal resistor configuration circuit, and CAN terminal resistors CAN be respectively set as follows through an external regulating switch: 120 Ω, 60 Ω, 4.4kΩ; the purpose is to independently match CAN terminal resistances of respective loops in the process of corresponding follow-up problem point investigation). The equipment provided by the application adopts the metal shielding shell, so that external EMC interference can be effectively blocked. The device of the application divides the bus into 2 independent CAN network loops through the relative middle position of the access CAN network backbone network, is convenient for users to divide the network, and gradually locates the fault point position by dividing the network layer by layer. The application can efficiently locate the problem points and does not affect the original functions of the vehicle.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (9)
1. A vehicle bus problem point detection device, characterized in that: the bus comprises a microprocessor and two mutually independent CAN channels connected with the microprocessor, wherein the two CAN channels are connected to the relative middle position of a CAN network backbone network to divide the bus into 2 independent CAN network loops; each channel of the CAN comprises a CAN transceiver and a terminal resistor configuration circuit, wherein the terminal resistor configuration circuit is provided with a plurality of resistors with different grades for configuration; error frames of two paths of CAN channels of the detection equipment are isolated from each other, and no routing is performed; after the detection equipment is powered on, routing all messages received by one CAN channel to the other CAN channel within 5 ms; meanwhile, the other CAN channel routes all messages received by the other CAN channel to one CAN channel within 5 ms.
2. The vehicle bus point of problem detection apparatus according to claim 1, wherein: the different resistances of the termination resistance configuration circuit are 120 omega, 60 omega and 4.4k omega respectively.
3. The vehicle bus point of problem detection apparatus according to claim 1, wherein: the terminal resistor configuration circuit is configured into a resistor of any grade through an external regulating switch.
4. The vehicle bus point of problem detection apparatus according to claim 1, wherein: the terminal resistance configuration circuit configures the resistance of the corresponding file according to the initial terminal resistance of the corresponding independent CAN network loop.
5. The vehicle bus point of problem detection apparatus according to claim 1, wherein: the detection device also comprises a power chip, and the power chip supplies power for the microprocessor and the two paths of CAN transceivers respectively.
6. The vehicle bus point of problem detection apparatus according to claim 1, wherein: the detection device has a metal shielding case, effectively blocking external EMC interference.
7. A detection method of a vehicle bus problem point detection apparatus employing the vehicle bus problem point detection apparatus according to any one of claims 1 to 6, characterized in that: the detection method comprises the following steps:
step 1, connecting detection equipment into a relative middle position of a CAN network backbone network to be detected, and dividing a bus into 2 independent CAN network loops;
step 2, configuring a terminal resistor configuration circuit of each path of CAN channel into a resistor of a corresponding gear according to a CAN network backbone network;
step 3, the vehicle is adjusted to be in a fault working condition, and normal message signal sending and receiving are carried out;
step 4, capturing message waveforms of 2 independent CAN network loops by using an oscilloscope, and determining the CAN network loops with interference;
step 5, judging whether the CAN network loop with the interference CAN be continuously segmented; if yes, continuing to divide the CAN network loop with the interference by using the detection equipment and executing the step 2; otherwise, locating and finding out the abnormal ECU and ending the detection.
8. The vehicle bus problem point detection apparatus according to claim 7, characterized in that: and 2, correspondingly configuring the terminal resistance configuration circuit according to the terminal resistances of the 2 independent CAN network loops.
9. The vehicle bus problem point detection apparatus according to claim 7, characterized in that: the failure conditions include engine start-up and turning on the air conditioner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010773003.4A CN111884865B (en) | 2020-08-04 | 2020-08-04 | Vehicle bus problem point detection equipment and detection method thereof |
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| CN202010773003.4A CN111884865B (en) | 2020-08-04 | 2020-08-04 | Vehicle bus problem point detection equipment and detection method thereof |
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| CN111884865B true CN111884865B (en) | 2023-11-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114679375A (en) * | 2022-03-31 | 2022-06-28 | 重庆长安新能源汽车科技有限公司 | Communication isolator and communication isolation troubleshooting positioning method |
| CN114884767B (en) * | 2022-05-07 | 2023-02-03 | 广州软件学院 | Synchronous dual-redundancy CAN bus communication system, method, equipment and medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360036A (en) * | 2007-07-31 | 2009-02-04 | 比亚迪股份有限公司 | CAN bus gateway controller and data transmission method between CAN buses |
| CN202175006U (en) * | 2011-07-07 | 2012-03-28 | 北汽福田汽车股份有限公司 | Vehicle control system based on CAN (controller area network) bus |
| CN104281142A (en) * | 2013-07-05 | 2015-01-14 | 广州汽车集团股份有限公司 | Car off-line testing method and system |
| CN106415673A (en) * | 2014-05-08 | 2017-02-15 | 罗伯特·博世有限公司 | Method for diagnosis of a state in a vehicle, and diagnosis tester |
| CN209860931U (en) * | 2019-05-21 | 2019-12-27 | 天津卡达克数据有限公司 | Intelligent CAN bus diagnosis monitor |
| CN212811725U (en) * | 2020-08-04 | 2021-03-26 | 东南（福建）汽车工业有限公司 | Vehicle bus problem point detection equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015105110A1 (en) * | 2015-04-02 | 2016-10-06 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Control unit for connecting a CAN bus to a radio network and motor vehicle with such a control unit |
-
2020
- 2020-08-04 CN CN202010773003.4A patent/CN111884865B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360036A (en) * | 2007-07-31 | 2009-02-04 | 比亚迪股份有限公司 | CAN bus gateway controller and data transmission method between CAN buses |
| CN202175006U (en) * | 2011-07-07 | 2012-03-28 | 北汽福田汽车股份有限公司 | Vehicle control system based on CAN (controller area network) bus |
| CN104281142A (en) * | 2013-07-05 | 2015-01-14 | 广州汽车集团股份有限公司 | Car off-line testing method and system |
| CN106415673A (en) * | 2014-05-08 | 2017-02-15 | 罗伯特·博世有限公司 | Method for diagnosis of a state in a vehicle, and diagnosis tester |
| CN209860931U (en) * | 2019-05-21 | 2019-12-27 | 天津卡达克数据有限公司 | Intelligent CAN bus diagnosis monitor |
| CN212811725U (en) * | 2020-08-04 | 2021-03-26 | 东南（福建）汽车工业有限公司 | Vehicle bus problem point detection equipment |
Non-Patent Citations (1)
| Title |
|---|
| 黎永键 ; 赵祚喜 ; .汽车CAN总线概述及其故障诊断检测方法.硅谷.2010,(第02期),全文. * |
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Address after: No. 66 Southeast Avenue, Qingkou Town, Minhou County, Fuzhou City, Fujian Province, 350119 Patentee after: Southeast (Fujian) Automobile Industry Co.,Ltd. Country or region after: China Address before: 350000 Qingkou Town, Minhou County, Fuzhou City, Fujian Province Patentee before: SOUTH EAST (FUJIAN) MOTOR Corp.,Ltd. Country or region before: China |