EP2893672A1 - Dispositif d'enregistrement de données pour un réseau de véhicule - Google Patents

Dispositif d'enregistrement de données pour un réseau de véhicule

Info

Publication number
EP2893672A1
EP2893672A1 EP13765296.2A EP13765296A EP2893672A1 EP 2893672 A1 EP2893672 A1 EP 2893672A1 EP 13765296 A EP13765296 A EP 13765296A EP 2893672 A1 EP2893672 A1 EP 2893672A1
Authority
EP
European Patent Office
Prior art keywords
data
communication
recording device
communication data
network
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.)
Withdrawn
Application number
EP13765296.2A
Other languages
German (de)
English (en)
Inventor
Helge ZINNER
Josef Nöbauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2893672A1 publication Critical patent/EP2893672A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/04—Processing captured monitoring data, e.g. for logfile generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/12—Network monitoring probes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • 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
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40241—Flexray
    • 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
    • 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
    • H04L41/069—Management of faults, events, alarms or notifications using logs of notifications; Post-processing of notifications

Definitions

  • the invention relates to a data recording device for recording communication data of a vehicle network, a diagnostic device and a method for recording communication data of a vehicle network.
  • Data recording devices or data loggers are used to read out communication data between electronic components, for example control devices, of a vehicle and further process them for diagnostic purposes.
  • CAN, FlexRay and MOST buses can be any type of bus.
  • FlexRay and MOST buses can be any type of bus.
  • Network vehicle network with each other and so form a networked vehicle network.
  • For the connection of these field buses has a star-shaped Net zwerktopologie etab ⁇ lines, in which a central gateway connects all buses while the external vehicle access to auf Marsh- devices through, for example through a single diagnostic connector that provides.
  • a central gateway connects all buses while the external vehicle access to auf Marsh- devices through, for example through a single diagnostic connector that provides.
  • vehicle diagnostics describes in reference to the Medizi ⁇ African term “diagnosis” the exact assignment of findings about errors on electrical and electronic components on vehicles.
  • vehicle diagnosis comprises a number of technical procedures and applications which are used, for example, in error analysis in the event of repairs, in quality assurance for statistical evaluations and in the field of vehicle diagnostics Vehicle development are applied.
  • vehicle diagnosis is used to inform or warn the driver about errors that have occurred and to initiate deactivations of vehicle properties, if their operation can not be assured beyond doubt.
  • the vehicle diagnostics can basically be divided into diagnostic components inside the vehicle - On-board diagnostics, and vehicle self-diagnosis, and diagnostic components outside the vehicle - off-board diagnostics (Di ⁇ agnose seeds, diagnostic tools).
  • vehicle diagnostics in the automotive industry can mean the (diagnostic) communication between an external test device, the diagnostic tester (vehicle diagnostic system), and the individual electronic components via a diagnostic protocol.
  • the diagnostic tester or the testing device can comprise a data recording device which records and reads out the communication data between the electronic components.
  • diagnostic data can be used (now standardized by ODX), which describe the communication and are kept in the diagnostic systems of the off-board diagnostics. They describe the diagnostic protocol used, each of the commands, the possible responses from the electronic component and the in ⁇ pretation of data such.
  • ODX standardized by ODX
  • a diagnostic access can be used as access to the vehicle diagnosis
  • Another group of diagnostic testers is predominantly software-based (can be operated on laptops or industrial PCs in the car) and also provides data logger functionality, such as.
  • the data logger is connected to a central interface of the vehicle network when the data of an entire vehicle is read out.
  • individual control units can also be read out separately. In addition, this may also depend on the fieldbus itself and the possible network topologies.
  • MOST with Ring structure
  • Ethernet can also be used as a means of communication between electronic components in the vehicle.
  • Ethernet Unlike the existing systems such as MOST, FlexRay and CAN Ethernet is today but no shared medium (ge ⁇ divided medium). In a shared medium, all participants share (electronic components) the range and all have access to the data content. Ethernet was also a shared medium in the original version, but is essentially only operated as a switched medium, in which the maximum bandwidth (eg, 100 Mbit / s) on each link (a network connection between two electronic components) in both directions (filling duplex) is available.
  • the maximum bandwidth eg, 100 Mbit / s
  • the communication is not distributed throughout the network. The communication is usually only between adjacent nodes. If the links are busy, the entire communication can not be distributed via an equally fast link. This can lead to a bottleneck in the bandwidth. This will be explained in more detail below with reference to FIG. 1.
  • the vehicle system may include a plurality of network links connecting the electronic components of a vehicle, for example a Automo ⁇ bils, cars, trucks, bus, motorcycle, etc..
  • the data recording device comprises a first input for receiving first communication data from a first point of the vehicle network and a second input for receiving second communication data from a second point of the vehicle network.
  • the data recording device can be connected via at least two inputs to different network connections or network cables of the vehicle network.
  • the data recording device may be configured to log communication data at various points of the vehicle network.
  • the data recording device can extract communication data from the vehicle network in parallel via a plurality of inputs or interfaces and optionally process them further.
  • the inputs may be directly connected to the respective points of the network, ie that the communication data is transmitted from separate points or connections, which are not part of the vehicle network, from the points to the inputs.
  • Such a connection may include a TAP or an additional switch.
  • an existing connection between the electronic components can be separated.
  • the data recording device is designed to provide the first communication data with a first time stamp and the second communication data with a second time stamp, wherein the first time stamp and the second time stamp are synchronized with one another.
  • Kom ⁇ munikations stylist which have been read from various points and / or by various devices of the vehicle network, are set in a temporal relationship and / or to be recorded chronologically to ionsereignis differ for example in the data between action event and Reakt ,
  • the aufZeichenvorraum can be designed to use a time synchronization protocol for synchronizing the commu ⁇ nikationschal.
  • communication data can be recorded distributed throughout the vehicle network and the communication data can be assigned a time stamp.
  • the vehicle network includes Ethernet connections.
  • the first communication data and the second communication data can be Ether- be net data packets.
  • the data tag device may be configured to read or log Ethernet communication data.
  • the communication data can be recorded and processed from an Ethernet-based network.
  • the data logger may have multiple Ethernet ports as inputs to receive data at various locations in the vehicle network.
  • the data recording device comprises an output for outputting the first communication data and the second communication data.
  • the aufZeichenvorraum can be designed to be the first communication data and the second data communication means of the first timestamps and second time stamp time ⁇ organize. In this way, the communication data can be temporally related and further processed.
  • the data recording device comprises a synchronization input for synchronizing the data recording device with another data recording device, so that the first time stamps and second time stamps are synchronized with time stamps of the further data recording device. If several data loggers are in use, they can in turn be synchronized with each other. In this way, a distributed log ⁇ went system can be constructed which comprises a plurality aufZeichenvortechnischen. To synchronize the aufZeichenvortechnischen, a protocol such as IEEE1588 or IEEE802.1AS, ver ⁇ turns in order to synchronize multiple of aufZeichenvortechniken time.
  • a protocol such as IEEE1588 or IEEE802.1AS
  • the communication data of very large Ethernet networks can be recorded by means of several synchronized data recording devices and a temporal reference of the recorded data can be established.
  • the data recording device or its logic is at least partially embodied in hardware.
  • the timestamps can already be by a corresponding hardware unit when receiving communication data. This possibility is also used for example in IEEE1588 or IEEE802.1AS and already supported by various modules. These timestamps allow the communication of each individual connection to be related to the other connections.
  • the diagnostic device comprises a vehicle network comprising a plurality of electronic components and a plurality of network connections connecting the electronic components. Further, the diagnostic device comprises a data logging device as described above and below.
  • the data recording device is connected to an input to an output of a network switch (ie a switch).
  • a plurality of inputs of the data logger may be connected (eg, via a network cable and a plug) to a plurality of switches to read data at various locations in the vehicle network.
  • the first or second point from which the communication data originate may thus be a switch.
  • the data recording device is connected to an input by means of a tap (eg Taps) to a network line.
  • the inputs may also be connected to multiple taps on different network lines providing a network connection.
  • the first or second point from which the communication data originate can thus be a network connection or a network line.
  • Another aspect of the invention relates to a method for recording communication data of a vehicle network. It is to be understood that features of the method as above ⁇ standing and below described, may also be features of the Da ⁇ tenauf Schweizervorraum and / or diagnosis device and vice versa.
  • the method comprises the steps of:
  • the method further comprises the step of:
  • the method makes it possible to log the communication of an entire network, for example an Ethernet vehicle network, and establish a temporal reference.
  • the recording may occur regardless of the bandwidth of the network through the multiple inputs and optionally through scalability through the use of multiple data loggers. In this way, enough capacity can be provided to hold all the data.
  • FIG. 1 shows schematically a vehicle communication network with a diagnostic device.
  • Fig. 2 shows schematically a vehicle communication network with a diagnostic device.
  • Fig. 3 shows schematically a diagnostic device according to an embodiment of the invention.
  • 4 schematically shows a diagnostic arrangement according to an embodiment of the invention.
  • 5 shows a flowchart for methods for recording communication data according to an embodiment of the invention.
  • Ethernet will represent in the coming years not only a Diagno ⁇ sebaldstelle to the car, but also in the vehicle network in the vehicle used. Due to the high bandwidth of Ethernet networks, new solutions may be required to ensure logging functionality. This is also explained in more detail with reference to the following two FIGS. 1 and 2.
  • FIG. 1 schematically shows a vehicle communication network 10 with star-star topology and a diagnostic device 12.
  • Electronic components 14 are each by a
  • Point-to-point connection 16 with a full-duplex bandwidth of 100 Mbit / s is connected to a switch 18a, 18b.
  • the connections 16 may be provided, for example, with an Ethernet line.
  • Switch 18a of the diagnostic device is exemplarily 12 is ⁇ closed.
  • Device 14a communicates with device 14b with a bandwidth of 90 Mbit / s and 14c with 14b with a bandwidth of 70 Mbit / s. These Communication is easily possible because switched Ethernet is full duplex capable. This means that the transmission direction does not affect the receive direction. However, if the entire communication, for example, by a process known as "Port Mirroring", for Diagno se réelle ⁇ are passed 12, so makes the connection 16 between the switch 18a and switch 18b a bottleneck.
  • Port Mirroring allows Mirror network traffic from one or more ports (inputs) of one switch to another port (also called a mirror port).
  • FIG. 2 schematically shows another vehicle network 10 with a diagnostic device 12 that is integrated in the switch 18b.
  • both switches 18a, 18b, the electronic component 14a and the switch 18a, and the electronic component 14b and the switch 18a are connected by a 1000 Mbit / s link 16.
  • vehicle communication network 10 shown in FIG. 2 corresponds to that shown in FIG.
  • the data transport to the diagnostic device 12 can not always be guaranteed if, for example, the communication from the electronic component 14a to the electronic component 14c also offers the speed of 1000 Mbit / s.
  • the connection 16 between the two switches 18a, 18b is overloaded (1010 Mbit / s instead of the maximum 1000 Mbit / s). For example, when in vehicles ver ⁇ used cameras these data rates may occur in the transmission of video.
  • FIGS. 1 and 2 have a data logger which is only connected to the network 10 via a single data interface.
  • the net topologies shown in Figures 1 and 2 can thus generate communication data that can not be completely recorded by such data loggers. In the worst case, only one connection 16 can be recorded.
  • FIG. 3 schematically shows a diagnostic device 20 comprising a vehicle network 10 and a diagnostic device 12.
  • the vehicle network 10 includes a daisy chain based Topo ⁇ logy, wherein a plurality of switches is arranged in a row 18th
  • the switches 18 are connected to one another via network connections 16, via which they can exchange communication data, for example at 100 Mbit / s.
  • Electronic components 14, which are only shown here by way of example, can be connected to each switch.
  • the cabling effort can be reduced compared to a star topology, and equipment variants can be implemented more easily.
  • the vehicle network 10 shown in FIG. 3 may also include other topologies, such as the topology shown in FIGS. 1 and 2.
  • a daisy-chain topology may have weaknesses in the case of a single diagnostic interface.
  • This topology is similar in principle to the topology of classic bus systems such as MOST, CAN and FlexRay.
  • MOST mobile Integrated Circuit
  • CAN CAN
  • FlexRay FlexRay
  • switch 18a communicates with switch 18b, that bandwidth will be the other as well Switches 18 in between no longer available.
  • Each switch 18 can easily send via a connection 16 with its neighboring node with 100 Mbit / s data, without this leading to packet ⁇ losses.
  • a diagnostic device with only one interface to the daisy-chain of the vehicle network 10 generally can never receive all data.
  • the diagnostic device 12 has a data recording device 22 or an Ethernet data logger 22, which has a plurality of inputs 24 or Ethernet or logging port s 24, via which communication data can be read in from several points of the network 10.
  • Each of the inputs 24 is connected to a switch 18a or via a tap 26 to a network connection 16.
  • the connection can be made for example via a separate (stitch) line 28.
  • the data recording device 22 fuses the communication data from the inputs 24 in its arithmetic unit.
  • the numerous interfaces 24 solve the bandwidth problem explained above. For standard Ethernet, it may be not ⁇ agile, both communication partners to have the bus speed. A 1000 Mbit / s port connected to a 100 Mbit / s port would only be able to communicate with the highest common bandwidth, in this case 100 Mbit / s.
  • the data recording device 22 comprises a further functionality, which is also used in the new Ethernet standard IEEE802.1AS.
  • the inputs 24 record the arrival time of the communication data.
  • the inputs 24 are synchronized in time and use the same time base. Thus, they can accurately assign the communication data arriving at other inputs 24 in parallel, and the data recording device 22 can then fuse the communication data as needed.
  • the diagnostic device 12 may include other components besides the data recording device 22, such as a filter 30 for Filtering the time-synchronized communication data, a display 32 for displaying the communication data, etc.
  • FIG. 4 schematically shows a further diagnostic arrangement 20, which comprises a plurality of diagnostic devices 12.
  • the diagnostic devices 12 and their data recording device 22 each include a further input 34 or Ethernet or logging port 34, with which the data recording device 22 can synchronize.
  • an additional connection 36 is provided between the distributed diagnostic devices 12 in order to synchronize them.
  • the data logger function of the arrangement 20 is thus distributed over several instances.
  • the data fusion can be time-synchronized.
  • Fig. 5 shows a flowchart for methods for recording communication data. Communication data can be read in data packets in the inputs 24, for example.
  • step 50 a first data packet is received or read in at input 24a.
  • step 52 a first timestamp is generated.
  • step 54 the first timestamp is added to the incoming first data packet.
  • step 56 a second data packet is received or read in at input 24b.
  • step 58 a second
  • the first timestamp is added to the incoming second data packet.
  • the first and second timestamps may be hardware timestamps when the data logger 22 is hardware implemented.
  • a central merging of the two data packets takes place.
  • the data packets can be added to a common data stream.
  • the first time stamp and the second time stamp ⁇ be matched and generates an arrival order of the two data packets.
  • incoming data packets from a plurality of sources 18, 16 can be merged with a computing unit of the data recording device 22.
  • the chronological sequence of the communication can be very important in order to be able to recognize and distinguish action and reaction.
  • the time synchronization is used to detect the order of the data packets. By hardware-based time synchronization, an accuracy of arrival of the data in the lower nanosecond range can be guaranteed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Data Mining & Analysis (AREA)
  • Mechanical Engineering (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un dispositif d'enregistrement de données (22), pour l'enregistrement de données de communication d'un réseau de véhicule (10), comprenant une première entrée (24a), pour la réception de premières données de communication d'un premier point (18, 16) du réseau de véhicule (10), et une seconde entrée, pour la réception de secondes données de communication d'un second point (18, 16) du réseau de véhicule (10). A cet effet, le dispositif d'enregistrement de données (22) est réalisé de manière à pourvoir les premières données de communication, avec une première estampille temporelle, et les secondes données de communication, avec une seconde estampille temporelle, la première estampille temporelle et la seconde estampille temporelle étant synchronisées entre elles.
EP13765296.2A 2012-09-10 2013-09-06 Dispositif d'enregistrement de données pour un réseau de véhicule Withdrawn EP2893672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012216012.4A DE102012216012A1 (de) 2012-09-10 2012-09-10 Datenaufzeichenvorrichtung für ein Fahrzeugnetzwerk
PCT/EP2013/068500 WO2014037517A1 (fr) 2012-09-10 2013-09-06 Dispositif d'enregistrement de données pour un réseau de véhicule

Publications (1)

Publication Number Publication Date
EP2893672A1 true EP2893672A1 (fr) 2015-07-15

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Application Number Title Priority Date Filing Date
EP13765296.2A Withdrawn EP2893672A1 (fr) 2012-09-10 2013-09-06 Dispositif d'enregistrement de données pour un réseau de véhicule

Country Status (5)

Country Link
US (1) US20150228130A1 (fr)
EP (1) EP2893672A1 (fr)
CN (1) CN104620541A (fr)
DE (1) DE102012216012A1 (fr)
WO (1) WO2014037517A1 (fr)

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Publication number Publication date
WO2014037517A1 (fr) 2014-03-13
CN104620541A (zh) 2015-05-13
DE102012216012A1 (de) 2014-03-13
US20150228130A1 (en) 2015-08-13

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