EP3208775B1 - Recording of operational data in a motor vehicle - Google Patents

Recording of operational data in a motor vehicle Download PDF

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Publication number
EP3208775B1
EP3208775B1 EP17153965.3A EP17153965A EP3208775B1 EP 3208775 B1 EP3208775 B1 EP 3208775B1 EP 17153965 A EP17153965 A EP 17153965A EP 3208775 B1 EP3208775 B1 EP 3208775B1
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Prior art keywords
data
recorded
operational data
subinterval
memory
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German (de)
French (fr)
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EP3208775A1 (en
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Christian Bernhold
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Deutsche Telekom AG
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Deutsche Telekom AG
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    • 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
    • G07C5/0841—Registering performance data
    • G07C5/085—Registering performance data using electronic data carriers
    • 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
    • G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station

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  • the invention relates to a method and a system for recording operating data ("data logging") in a motor vehicle that is in operation, the operating data to be recorded being recorded using sensors located on the motor vehicle and the sensors or their evaluation modules via a common serial data line (vehicle bus ), in particular via a CAN ( C ontroller Area Network ) bus, are in data-conducting connection with a storage unit. The recorded operating data is then recorded in the storage unit.
  • data logging operating data
  • Such methods and corresponding systems have been known for a long time. They are used to record a variety of parameters (operating data) that characterize the operation of the motor vehicle and the conditions while driving, along with a timeline.
  • operating data operating data
  • the complexity of the evaluation also increases, so that it becomes increasingly difficult to identify faults from the data stream of operating data. This is particularly true since known systems continuously record the entire data volume on the vehicle bus during a test drive. Anomalies during the test drive are then recorded in writing by a person. After the test drive, time-consuming follow-up and evaluation takes place based on the recorded data in conjunction with the notes. Individual fragments are extracted from the mass of recorded data, which are supposed to correlate in time with the respective manual recordings. This type of evaluation has a high potential for errors because of the difficult synchronization of the fragments from the CAN data and the manual recordings.
  • the object of the invention is now to propose a method or a system for recording operating data in motor vehicles, which can be implemented easily and with inexpensive means and which ensures convenient evaluation based on the recorded operating data and precise error diagnosis.
  • the basic idea of the solution according to the invention is, in summary, to record and save the operating data of the motor vehicle during operation only within a defined time interval together with the time axis, this time interval being defined by the time at which an event occurs - in the form of the occurrence of an event Disturbance and/or malfunction - is determined in such a way that the event occurs within the recorded time interval.
  • the time interval is composed of a first sub-interval ⁇ T1, which lies before the event, and a second sub-interval ⁇ T2, which lies after the event.
  • the first partial interval before the event is recorded with a ring memory, the contents of which are constantly overwritten in a rolling manner, like a voice recorder.
  • the operating data is stored continuously, for example for the last minutes or seconds Recorded in an endless loop. Data recording into the ring buffer is started at the beginning of a test drive. When the event then occurs, the contents of the ring buffer are "frozen” so to speak, so that the data volume in the first sub-interval before the event occurs is stored together with the time axis. The length of the first sub-interval is accordingly defined by the memory contents of the ring buffer.
  • the operating data is recorded “linearly” on the time axis within the second sub-interval. The operating data recorded in the second sub-interval is then temporally appended to that of the first sub-interval.
  • the operating data are thus recorded along the time axis within the entire time interval, the length of the time interval being predeterminable over the lengths of the two sub-intervals.
  • the start time of the time interval which is in the past with respect to the event, is defined by the memory content of the first memory unit, which is designed as a ring memory, into which the operating data is continuously recorded on a rolling basis during operation.
  • the end time of the time interval is then defined via the second sub-interval, the length of which is preset by a user specification.
  • the time interval during the rolling recording in the ring memory is fixed with a start command at a fixed point that correlates with the time at which the event occurred.
  • the start command the current contents of the ring memory are "frozen", in particular copied into a separate memory, and the further operating data recorded from the fixed point to the end time are appended as a time-linear data sequence to the operating data coming from the ring memory.
  • the storage capacity of the ring buffer In order to be able to set the time interval flexibly, it is advantageous to preset the storage capacity of the ring buffer and thus the length of the first sub-interval by a user specification.
  • the specification of the storage capacity can be based on the expected event and its history. Normally it will be sufficient to set the storage capacity so that that the operating data is recorded over a few minutes before being overwritten on a rolling basis.
  • the automotive CAN bus recording device can be designed as an embedded component that has a data-conducting connection to an application (“app”) running on a smartphone.
  • the application can be used to set the functions of the tracker and process the recorded operating data.
  • the start command can be generated via the app on the smartphone via “one-click” or by voice command and sent from the smartphone to the tracker via the radio connection.
  • the operating data recorded by the tracker can be transferred via the application to a central background computer (“backend”).
  • the data transmission between the tracker and the smartphone and between the smartphone and the backend advantageously takes place via a radio connection, in particular via a long-distance radio connection LTE, UMTS or a local radio connection such as WLAN or Bluetooth.
  • communication on the CAN bus can be recorded in relevant time periods and additionally enriched with secondary information. All data is promptly transmitted to the backend and is available there centrally for analysis. Important vehicle bus data can be recorded in a time period that can be parameterized via the app.
  • the CAN data recorded along the time axis can also be supplemented by the user with secondary information such as photos, videos, audio files and/or Text input can be linked via the smartphone.
  • the GPS and time data of the event as well as GPS and time data of the test drive can be saved at specific points in time along the timeline.
  • This operating data can be linked and saved directly with the corresponding GPS and time data as well as the user's secondary information.
  • the GPS data can be saved even if there is no CAN bus recording in order to be able to retrace the complete route of the test drive later.
  • the CAN bus recording is started automatically or by a person in the vehicle using a "one-click" or voice command as a start command, thus setting the fixed point.
  • the past CAN data is temporarily stored in the ring buffer for a certain period of time and forms the first sub-interval.
  • the lead time of the ring memory and/or the follow-up time of the linear data recording, which forms the second sub-interval, can be parameterized via the smartphone.
  • the linear data recording takes place as a real-time recording of the data exchanged via the CAN bus. All data can later be sent directly to the backend, for which it is advantageous Provide a cloud solution backend.
  • the data in the backend can be evaluated and analyzed at a later point in time. It is also possible to visualize the test drives and make the event data available for download.
  • a CAN data logger 2 (“tracker”) is installed in a motor vehicle 1 and is connected to the CAN bus of the motor vehicle 1.
  • sensors are installed in and/or on the motor vehicle 1, which are connected to the CAN bus directly or via evaluation modules.
  • sensor is used here in a very general sense and includes all means with which operating data can be recorded in the form of physical quantities that are related to the motor vehicle, to the journey or to the environment.
  • a storage unit is also provided in the motor vehicle 1, with which the operating data is recorded.
  • the term “motor vehicle” is also used very generally and includes all vehicles that move on land, in the air and on water.
  • the storage unit is designed as a ring memory or ring buffer, which records the operating data continuously during operation and together with the time axis and overwrites the recorded operating data on a "rolling basis" starting at the beginning when the storage capacity is reached.
  • the storage capacity of the ring buffer - and thus the length of the first sub-interval to be recorded - can be preset by a user specification.
  • the system also includes a smartphone 3 on which an application for handling the system runs.
  • the menu on Smartphone 3 is shown in two states. While the user interface 23 enables the selection of certain additional data, the user interface 24 presents a distinctive start button 25, which enables the strat command to be entered.
  • a local radio connection 4 is provided between the motor vehicle and the smartphone, via which the operating data from the motor vehicle 1 to the smartphone 3 and control commands from the smartphone 3 to the motor vehicle 1 are transmitted.
  • the local radio connection works via Bluetooth or WLAN.
  • the above-mentioned storage unit in the form of the ring memory can also be implemented in the smartphone 3, so that the operating data is recorded in the motor vehicle and transmitted to the smartphone for storage via the local radio connection 4.
  • the application running on Smartphone 3 enables the start command to be specified with one click.
  • image data, video data, voice data and text data can be created via the application and assigned to the operating data in time synchronization.
  • this additional data is linked to the recorded CAN frames.
  • the user 5 can enter a voice command “error on wet road” via the audio connection 6.
  • the backend system in the data cloud 7, which is accessible via a radio connection 8.
  • a corresponding module 9 is provided in the backend system.
  • the backend system can provide interfaces 10 to all possible systems. Functions 11 for converting speech into text and interfaces 12 to “Big Data” can also be provided. Any other modules 13 are possible.
  • the application offers the user 14 four different menu items: Under menu item 15, the user 14 can transfer the stored operating data to the backend, whereby the data comes from the smartphone's own memory 16. Under menu item 16, the user can start recording GPS data, which is then assigned to the stored operating data on the timeline. Menu item 17 offers the central input option with which the start command for freezing the operating data from the rolling memory and the recording of the operating data into the linear memory is started. The operating data is transferred to the memory 16. Under menu item 18 the user can record additional data. He can enter text via a text field 19 presented to him. He can also initiate a recording with a photo camera 20, a microphone 21 or a video camera 22. The data recorded in each case is also transferred to the memory 16.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Traffic Control Systems (AREA)

Description

Die Erfindung betrifft ein Verfahren und ein System zur Aufzeichnung von Betriebsdaten ("Data Logging") in einem sich im Betrieb befindlichen Kraftfahrzeug, wobei die aufzuzeichnenden Betriebsdaten mittels am Kraftfahrzeug befindlicher Sensoren aufgenommen werden und die Sensoren oder deren Auswertemodule über eine gemeinsame serielle Datenleitung (Fahrzeugbus), insbesondere über einen CAN ( Controller Area Network) Bus, mit einer Speichereinheit in datenleitender Verbindung stehen. Die aufgenommenen Betriebsdaten werden dann in der Speichereinheit aufgezeichnet.The invention relates to a method and a system for recording operating data ("data logging") in a motor vehicle that is in operation, the operating data to be recorded being recorded using sensors located on the motor vehicle and the sensors or their evaluation modules via a common serial data line (vehicle bus ), in particular via a CAN ( C ontroller Area Network ) bus, are in data-conducting connection with a storage unit. The recorded operating data is then recorded in the storage unit.

Derartige Verfahren und entsprechende Systeme sind seit langer Zeit bekannt. Sie werden eingesetzt, um während der Fahrt eine Vielzahl von Parametern (Betriebsdaten), die den Betrieb des Kraftfahrzeugs und die Bedingungen während der Fahrt charakterisieren, zusammen mit einer Zeitachse aufzuzeichnen. Mit der Vielzahl der aufzuzeichnenden Betriebsdaten wächst jedoch auch die Komplexität der Auswertung, so dass es immer schwieriger wird, aus dem Datenstrom der Betriebsdaten die Störungen zu erkennen. Das gilt insbesondere, da bekannte Systeme während einer Testfahrt das komplette Datenaufkommen auf dem Fahrzeugbus kontinuierlich aufzeichnen. Anomalien während der Testfahrt werden dann von einer Person schriftlich fixiert. Im Anschluss an die Testfahrt erfolgt dann eine zeitaufwendige Nachbereitung und Auswertung anhand der aufgezeichneten Daten in Verbindung mit den Notizen. Dabei werden aus der Masse der aufgezeichneten Daten einzelne Fragmente extrahiert, die mit den jeweiligen manuellen Aufzeichnungen zeitlich korrelieren sollen. Diese Art der Auswertung birgt ein hohes Fehlerpotential wegen der schwierigen Synchronisierung der Fragmente aus den CAN Daten und der manuellen Aufzeichnungen.Such methods and corresponding systems have been known for a long time. They are used to record a variety of parameters (operating data) that characterize the operation of the motor vehicle and the conditions while driving, along with a timeline. However, with the large number of operating data to be recorded, the complexity of the evaluation also increases, so that it becomes increasingly difficult to identify faults from the data stream of operating data. This is particularly true since known systems continuously record the entire data volume on the vehicle bus during a test drive. Anomalies during the test drive are then recorded in writing by a person. After the test drive, time-consuming follow-up and evaluation takes place based on the recorded data in conjunction with the notes. Individual fragments are extracted from the mass of recorded data, which are supposed to correlate in time with the respective manual recordings. This type of evaluation has a high potential for errors because of the difficult synchronization of the fragments from the CAN data and the manual recordings.

Außerdem sind Systeme zur Unfalldatenspeicherung bekannt. Stellvertretend wird auf die DE 10 2013 014 879 A1 hingewiesen. Diese Systeme funktionieren im Prinzip wie die Black-Box und der Voice Recorder in Flugzeugen. Sie zeichnen bestimmte Betriebsdaten in einem rollierenden Ringspeicher auf. Wenn es zum Unfall kommt, dient dieses Ereignis als Trigger-Signal, woraufhin der Speicherinhalt des Ringspeichers in einen dauerhaften Speicher übertragen wird und dort zur Auslese zur Verfügung steht. Ähnliche Systeme sind in der DE 10 2008 047 727 A1 und der DE 10 2013 225 338 A1 bekannt. Der Stand der Technik umfasst des Weiteren die DE 10 2013 000686 A1 , US 2005/240343 A1 und US 2015/187146 A1 .Systems for accident data storage are also known. This is represented by the DE 10 2013 014 879 A1 pointed out. These systems basically work like the black box and voice recorder on airplanes. They record certain operating data in a rolling ring memory. If an accident occurs, this event serves as a trigger signal, whereupon the memory contents of the ring buffer are transferred to permanent memory where they are available for reading. Similar systems are in the DE 10 2008 047 727 A1 and the DE 10 2013 225 338 A1 known. The state of the art also includes: DE 10 2013 000686 A1 , US 2005/240343 A1 and US 2015/187146 A1 .

Aufgabe der Erfindung ist es nunmehr, ein Verfahren respektive ein System zur Aufzeichnung von Betriebsdaten in Kraftfahrzeugen vorzuschlagen, das sich einfach und mit kostengünstigen Mitteln umsetzen lässt und das eine komfortable Auswertung anhand der aufgenommenen Betriebsdaten und eine genaue Fehlerdiagnose gewährleistet.The object of the invention is now to propose a method or a system for recording operating data in motor vehicles, which can be implemented easily and with inexpensive means and which ensures convenient evaluation based on the recorded operating data and precise error diagnosis.

Diese Aufgabe wird durch das Verfahren nach Anspruch 1 und das System nach Anspruch 6 gelöst. Bevorzugte Ausgestaltungen ergeben sich aus den jeweiligen Unteransprüchen.This object is achieved by the method according to claim 1 and the system according to claim 6. Preferred embodiments result from the respective subclaims.

Entsprechend der Ansprüche liegt die grundlegende Idee der erfindungsgemäßen Lösung zusammengefasst zunächst darin, die Betriebsdaten des Kraftfahrzeugs während des Betriebs nur innerhalb eines definierten Zeitintervalls zusammen mit der Zeitachse aufzuzeichnen und abzuspeichern, wobei dieses Zeitintervall durch den Zeitpunkt des Auftretens eines Ereignisses - in Form des Auftretens eines Stör- und/oder Fehlverhaltens - derart festgelegt wird, so dass das Ereignis innerhalb des aufgezeichneten Zeitintervalls zu liegen kommt. Dabei setzt sich das Zeitintervall zusammen aus einem ersten Teilintervall ΔT1, das vor dem Ereignis liegt, und einem zweiten Teilintervall ΔT2, das nach dem Ereignis liegt.According to the claims, the basic idea of the solution according to the invention is, in summary, to record and save the operating data of the motor vehicle during operation only within a defined time interval together with the time axis, this time interval being defined by the time at which an event occurs - in the form of the occurrence of an event Disturbance and/or malfunction - is determined in such a way that the event occurs within the recorded time interval. The time interval is composed of a first sub-interval ΔT1, which lies before the event, and a second sub-interval ΔT2, which lies after the event.

Erfindungsgemäß wird das vor dem Ereignis liegende erste Teilintervall mit einem Ringspeicher aufgenommen, dessen Inhalt sich wie bei einem Stimmenrecorder ständig rollierend überschreibt. In dem Ringspeicher werden somit die Betriebsdaten fortlaufend beispielsweise für die letzten Minuten oder Sekunden in einer Endlosschleife aufgezeichnet. Die Datenaufnahme in den Ringspeicher wird zu Beginn einer Testfahrt gestartet. Wenn dann das Ereignis eintritt, wird der Inhalt des Ringspeichers quasi "eingefroren", so dass das Datenaufkommen in dem ersten Teilintervall vor Eintritt des Ereignisses zusammen mit der Zeitachse gespeichert ist. Die Länge des ersten Teilintervalls wird dementsprechend durch den Speicherinhalt des Ringspeichers definiert. Erfindungsgemäß werden nach Eintritt des Ereignisses die Betriebsdaten noch innerhalb des zweiten Teilintervalls "linear" auf der Zeitachse aufgenommen. Die im zweiten Teilintervall aufgenommenen Betriebsdaten werde dann an die des ersten Teilintervalls zeitlich angehängt.According to the invention, the first partial interval before the event is recorded with a ring memory, the contents of which are constantly overwritten in a rolling manner, like a voice recorder. In the ring memory, the operating data is stored continuously, for example for the last minutes or seconds Recorded in an endless loop. Data recording into the ring buffer is started at the beginning of a test drive. When the event then occurs, the contents of the ring buffer are "frozen" so to speak, so that the data volume in the first sub-interval before the event occurs is stored together with the time axis. The length of the first sub-interval is accordingly defined by the memory contents of the ring buffer. According to the invention, after the event occurs, the operating data is recorded “linearly” on the time axis within the second sub-interval. The operating data recorded in the second sub-interval is then temporally appended to that of the first sub-interval.

Anspruchsgemäß werden die Betriebsdaten somit innerhalb des gesamten Zeitintervalls entlang der Zeitachse aufgezeichnet, wobei die Länge des Zeitintervalls über die Längen der beiden Teilintervalle vorgebbar ist. Der bezüglich des Ereignisses in der Vergangenheit liegende Anfangszeitpunkt des Zeitintervalls wird durch den Speicherinhalt der als Ringspeicher ausgebildeten ersten Speichereinheit definiert, in die die Betriebsdaten während des Betriebes kontinuierlich rollierend aufzeichnet werden. Der Endzeitpunkt des Zeitintervalls wird dann über das zweite Teilintervall definiert, dessen Länge durch eine Benutzervorgabe voreingestellt wird.According to the claim, the operating data are thus recorded along the time axis within the entire time interval, the length of the time interval being predeterminable over the lengths of the two sub-intervals. The start time of the time interval, which is in the past with respect to the event, is defined by the memory content of the first memory unit, which is designed as a ring memory, into which the operating data is continuously recorded on a rolling basis during operation. The end time of the time interval is then defined via the second sub-interval, the length of which is preset by a user specification.

Dabei wird das Zeitintervall während der rollierenden Aufzeichnung in den Ringspeicher mit einem Startbefehl an einem Fixpunkt, der mit dem Zeitpunkt des Auftretens des Ereignisses korreliert, fixiert. Mit dem Startbefehl wird der aktuelle Inhalt des Ringspeichers "eingefroren", insbesondere in einen separaten Speicher kopiert, und die weiteren vom Fixpunkt bis zum Endzeitpunkt aufgezeichneten Betriebsdaten werden als zeitlich lineare Datenfolge an die aus dem Ringspeicher stammenden Betriebsdaten angehängt.The time interval during the rolling recording in the ring memory is fixed with a start command at a fixed point that correlates with the time at which the event occurred. With the start command, the current contents of the ring memory are "frozen", in particular copied into a separate memory, and the further operating data recorded from the fixed point to the end time are appended as a time-linear data sequence to the operating data coming from the ring memory.

Um das Zeitintervall flexibel einstellen zu können, ist es vorteilhaft, die Speicherkapazität des Ringspeichers und damit die Länge des ersten Teilintervalls durch eine Benutzervorgabe voreinzustellen. Dabei kann sich die Vorgabe der Speicherkapazität an dem zu erwartenden Ereignis und an dessen Vorgeschichte ausrichten. Im Normalfall wird es ausreichen, die Speicherkapazität so einzustellen, dass die Betriebsdaten über einige Minuten aufgenommen werden, bevor sie rollierend überschrieben werden.In order to be able to set the time interval flexibly, it is advantageous to preset the storage capacity of the ring buffer and thus the length of the first sub-interval by a user specification. The specification of the storage capacity can be based on the expected event and its history. Normally it will be sufficient to set the storage capacity so that that the operating data is recorded over a few minutes before being overwritten on a rolling basis.

Um plötzlich eintretende Ereignisse nachträglich besser analysieren zu können, ist es vorteilhaft, neben der zeitlichen Länge der Teilintervalle auch die zeitliche Auflösung einstellen zu können. Bei höherer Auflösung werden mehr Betriebsdaten pro Zeiteinheit von den Sensoren aufgenommen und abgespeichert. Auch die Vorgabe einer geringeren Auflösung kann Vorteile haben, um Langzeiteffekte im Zeitraffer untersuchen zu können.In order to be able to better analyze suddenly occurring events subsequently, it is advantageous to be able to set the temporal resolution in addition to the temporal length of the subintervals. With higher resolution, more operating data is recorded and stored by the sensors per unit of time. Specifying a lower resolution can also have advantages in order to be able to examine long-term effects in time-lapse.

Zur Verbesserung des Bedienkomforts ist es von Vorteil, das System aus verschiedenen untereinander in datenleitender Verbindung stehenden Komponenten zusammenzusetzen. Dabei kann das automotive CAN-Bus Aufzeichnungsgerät ("Tracker") als eine eigebettete ("embedded") Komponente ausgestaltet sein, die eine datenleitende Anbindung an eine auf einem Smartphone laufende Applikation ("App") hat. Über die Applikation können die Funktionen des Trackers eingestellt und die aufgenommenen Betriebsdaten verarbeitet werden. Insbesondere kann über die App auf dem Smartphone der Startbefehl per "one-Klick" oder per Sprachbefehl generiert und über die Funkverbindung von dem Smartphone an den Tracker geschickt werden. Zudem können die vom Tracker aufgenommenen Betriebsdaten über die Applikation an einen zentralen Hintergrundrechner ("Backend") übertragen werden. Die Datenübertragung zwischen dem Tracker und dem Smartphone sowie zwischen dem Smartphone und dem Backend findet vorteilhafterweise jeweils über eine Funkverbindung, insbesondere über eine Fernfunkverbindung LTE, UMTS oder eine Nahfunkverbindung wie WLAN oder Bluetooth, statt.To improve ease of use, it is advantageous to assemble the system from various components that are connected to one another in a data-conducting manner. The automotive CAN bus recording device (“tracker”) can be designed as an embedded component that has a data-conducting connection to an application (“app”) running on a smartphone. The application can be used to set the functions of the tracker and process the recorded operating data. In particular, the start command can be generated via the app on the smartphone via “one-click” or by voice command and sent from the smartphone to the tracker via the radio connection. In addition, the operating data recorded by the tracker can be transferred via the application to a central background computer (“backend”). The data transmission between the tracker and the smartphone and between the smartphone and the backend advantageously takes place via a radio connection, in particular via a long-distance radio connection LTE, UMTS or a local radio connection such as WLAN or Bluetooth.

Mit einem solchen System kann die Kommunikation auf dem CAN Bus in relevanten Zeitabschnitten aufgezeichnet und zusätzlich mit Sekundärinformation angereichert werden. Alle Daten werden zeitnah an das Backend übermittelt und stehen dort zentral zur analysierenden Aufwertung zur Verfügung. Wichtige Fahrzeugbus-Daten können in einem über die App parametrierbaren Zeitabschnitt aufgezeichnet werden. Diese entlang der Zeitachse aufgezeichneten CAN-Daten können vom Anwender zusätzlich mit Sekundärinformation, wie Fotos, Videos, Audio-Dateien und/oder Texteingaben, über das Smartphone verknüpft werden. Zudem können die GPS- und Zeitdaten des Ereignisses sowie GPS- und Zeitdaten der Testfahrt zu bestimmten Zeitpunkten entlang der Zeitachste gespeichert werden. Insgesamt erbringt das System erhebliche Zeiteinsparungen bei der Auswertung
Diese Art des Aufzeichnens der Betriebsdaten in Kombination mit Positions- und Zeitangaben sowie speziellen Benutzereingaben in Form von Audio/Video- und Texteingaben erleichtert und beschleunigt die Auswertung der Betriebsdaten im Backend und ermöglicht eine genaue Fehleranalyse. Mit Einsatz der Erfindung ist es nun nicht mehr notwendig, die enormen Datenmengen der CAN-Daten mit den GPS-Daten und Sprachaufnahmen nach der Testfahrt wie vormals zu fragmentieren und anschließend zu verknüpfen. Der "Device Analytics Tracker" gewährleistet eine Arbeits-, Zeit- und Resourcenersparnis.With such a system, communication on the CAN bus can be recorded in relevant time periods and additionally enriched with secondary information. All data is promptly transmitted to the backend and is available there centrally for analysis. Important vehicle bus data can be recorded in a time period that can be parameterized via the app. The CAN data recorded along the time axis can also be supplemented by the user with secondary information such as photos, videos, audio files and/or Text input can be linked via the smartphone. In addition, the GPS and time data of the event as well as GPS and time data of the test drive can be saved at specific points in time along the timeline. Overall, the system saves considerable time during evaluation
This type of recording of the operating data in combination with position and time information as well as special user inputs in the form of audio/video and text inputs facilitates and accelerates the evaluation of the operating data in the backend and enables precise error analysis. With the use of the invention, it is no longer necessary to fragment and then link the enormous amounts of CAN data with the GPS data and voice recordings after the test drive as before. The “Device Analytics Tracker” ensures savings in work, time and resources.

Damit ist der "Device Analytics Tracker" ein System für den automotiven Sektor, das in der Lage ist, die relevanten CAN- Betriebsdaten vom CAN-Bus des Fahrzeuges "herauszufiltern". Diese Betriebsdaten können direkt mit den entsprechenden GPS- und Zeitdaten sowie den Sekundärinformationen des Anwenders verknüpft und abgespeichert werden. Dabei können die GPS-Daten auch dann gespeichert werden, wenn keine CAN-Bus Aufnahme stattfindet, um später die komplette Streckenroute der Testfahrt nachvollziehen zu können.This makes the "Device Analytics Tracker" a system for the automotive sector that is able to "filter out" the relevant CAN operating data from the vehicle's CAN bus. This operating data can be linked and saved directly with the corresponding GPS and time data as well as the user's secondary information. The GPS data can be saved even if there is no CAN bus recording in order to be able to retrace the complete route of the test drive later.

Sobald ein Ereignis in Form einer Störung oder eines Fehler auftritt, wird die CAN-Bus Aufzeichnung automatisch oder durch eine Person im Fahrzeug per "One-Klick" oder Sprachkommando als Startbefehl gestartet und damit der Fixpunkt festgelegt. Die zurückliegenden CAN-Daten sind im Ringpuffer über einen gewissen Zeitraum zwischengespeichert und bilden das erste Teilintervall. Beim Starten der Aufzeichnung wird also zunächst der Inhalt des Ringspeichers gespeichert. Dabei kann die Vorlaufzeit des Ringspeichers und/oder die Nachlaufzeit der linearen Datenaufnahme, die das zweite Teilintervall bildet, über das Smartphone parametriesiert werden. Die lineare Datenaufnahme erfolgt als Echtzeitaufnahme der über den CAN-Bus ausgetauschten Daten. Alle Daten können später direkt an das Backend gesendet werden, wobei es vorteilhaft ist, für das Backend eine Cloudlösung vorzusehen. Die Daten im Backend können zu einem späteren Zeitpunkt ausgewertet und analysiert werden. Zudem besteht die Möglichkeit, die Testfahren zu visualisieren und die Ereignissdaten zum Download bereit zu stellen.As soon as an event in the form of a malfunction or error occurs, the CAN bus recording is started automatically or by a person in the vehicle using a "one-click" or voice command as a start command, thus setting the fixed point. The past CAN data is temporarily stored in the ring buffer for a certain period of time and forms the first sub-interval. When you start recording, the contents of the ring buffer are first saved. The lead time of the ring memory and/or the follow-up time of the linear data recording, which forms the second sub-interval, can be parameterized via the smartphone. The linear data recording takes place as a real-time recording of the data exchanged via the CAN bus. All data can later be sent directly to the backend, for which it is advantageous Provide a cloud solution backend. The data in the backend can be evaluated and analyzed at a later point in time. It is also possible to visualize the test drives and make the event data available for download.

Die Erfindung wird nachfolgend anhand der Figuren näher beschrieben. Es zeigen:

Figur 1
das System und
Figur 2
die Funktionsweise der auf dem Smartphone laufenden Applikation.
The invention is described in more detail below with reference to the figures. Show it:
Figure 1
the system and
Figure 2
the functionality of the application running on the smartphone.

In Figur 1 sind die Komponenten des Systems dargestellt. In einem Kraftfahrzeug 1 ist ein CAN-Datenlogger 2 ("Tracker") eingebaut und an den CAN Bus des Kraftfahrzeugs 1 angeschlossen. Zur Aufnahme der relevanten Betriebsdaten sind im und/oder am Kraftfahrzeug 1 entsprechende Sensoren angebracht, die unmittelbar oder über Auswertemodule an den CAN Bus angeschlossen sind. Der Begriff "Sensor" ist hier in großer Allgemeinheit gebraucht und umfasst alle Mittel, mit denen sich Betriebsdaten in Form physikalischer Größen aufnehmen lassen, die im Zusammenhang mit dem Kraftfahrzeug, mit der Fahrt oder mit der Umgebung stehen. Im Kraftfahrzeug 1 ist zudem eine Speichereinheit vorgesehen, mit der die Betriebsdaten aufgezeichnet werden. Auch das Merkmal "Kraftfahrzeug" ist in großer Allgemeinheit gebraucht und umfasst alle Fahrzeuge, die sich auf dem Land, in der Luft und auf dem Wasser bewegen.In Figure 1 The components of the system are shown. A CAN data logger 2 (“tracker”) is installed in a motor vehicle 1 and is connected to the CAN bus of the motor vehicle 1. To record the relevant operating data, corresponding sensors are installed in and/or on the motor vehicle 1, which are connected to the CAN bus directly or via evaluation modules. The term “sensor” is used here in a very general sense and includes all means with which operating data can be recorded in the form of physical quantities that are related to the motor vehicle, to the journey or to the environment. A storage unit is also provided in the motor vehicle 1, with which the operating data is recorded. The term “motor vehicle” is also used very generally and includes all vehicles that move on land, in the air and on water.

Erfindungsgemäß ist die Speichereinheit als ein Ringspeicher oder Ringpuffer ausgebildet, der die Betriebsdaten während des Betriebes kontinuierlich und zusammen mit der Zeitachse aufzeichnet und die aufgezeichneten Betriebsdaten "rollierend" bei Erreichen der Speicherkapazität am Anfang beginnend wieder überschreibt. Die Speicherkapazität des Ringspeichers - und damit die Länge des aufzuzeichnenden ersten Teilintervalls- kann durch eine Benutzervorgabe voreingestellt werden.According to the invention, the storage unit is designed as a ring memory or ring buffer, which records the operating data continuously during operation and together with the time axis and overwrites the recorded operating data on a "rolling basis" starting at the beginning when the storage capacity is reached. The storage capacity of the ring buffer - and thus the length of the first sub-interval to be recorded - can be preset by a user specification.

Zudem umfasst das System ein Smartphone 3, auf dem eine Applikation zur Handhabung des Systems läuft. Das Menü auf dem Smartphone 3 ist in zwei Zuständen gezeigt. Während der die Bedienoberfläche 23 die Auswahl bestimmter Zusatzdaten ermöglicht, präsentiert die Bedienoberfläche 24 einen markanten Startknopf 25, mit em die Eingabe des Stratbefehls ermöglicht wird. Zwischen dem Kraftfahrzeug und dem Smartphone ist eine Nahfunkverbindung 4 vorgesehen, über welche die Betriebsdaten vom Kraftfahrzeug 1 zum Smartphone 3 und Steuerbefehle vom Smartphone 3 zum Kraftfahrzeug 1 übermittelt werden. Die Nahfunkverbindung arbeitet über Bluetooth oder WLAN. Die oben genannte Speichereinheit in Form des Ringspeichers kann auch im Smartphone 3 implementiert sein, so dass die Betriebsdaten im Kraftfahrzeug aufgenommen und über die Nahfunkverbindung 4 an das Smartphone zur Abspeicherung übermittelt werden.The system also includes a smartphone 3 on which an application for handling the system runs. The menu on Smartphone 3 is shown in two states. While the user interface 23 enables the selection of certain additional data, the user interface 24 presents a distinctive start button 25, which enables the strat command to be entered. A local radio connection 4 is provided between the motor vehicle and the smartphone, via which the operating data from the motor vehicle 1 to the smartphone 3 and control commands from the smartphone 3 to the motor vehicle 1 are transmitted. The local radio connection works via Bluetooth or WLAN. The above-mentioned storage unit in the form of the ring memory can also be implemented in the smartphone 3, so that the operating data is recorded in the motor vehicle and transmitted to the smartphone for storage via the local radio connection 4.

Die auf dem Smartphone 3 laufende Applikation ermöglicht die Vorgabe des Startbefehls durch One-Klick. Zudem können während der Aufzeichnung der Betriebsdaten im Ringspeicher (erstes Teilintervall) und im linearen Speicher (zweites Teilintervall) über die Applikation Bilddaten, Videodaten, Sprachdaten und Textdaten erstellt und den Betriebsdaten in zeitlicher Synchronisation zugeordnet werden. Beim Speichern der Eingaben werden diese zusätzlichen Daten mit den aufgenommenen CAN-Frames verknüpft. Insbesondere kann der Nutzer 5 über die Audioverbindung 6 einen Sprachbefehl "Fehler auf nasser Fahrbahn" eingeben.The application running on Smartphone 3 enables the start command to be specified with one click. In addition, while the operating data is being recorded in the ring memory (first sub-interval) and in the linear memory (second sub-interval), image data, video data, voice data and text data can be created via the application and assigned to the operating data in time synchronization. When the entries are saved, this additional data is linked to the recorded CAN frames. In particular, the user 5 can enter a voice command “error on wet road” via the audio connection 6.

Eine weitere Komponente des Systems ist das Backendsystem in der Datencloud 7, das über eine Funkverbindung 8 zugänglich ist. Hier stehen große Rechner- und Speicherkapazitäten zur Verfügung, so dass eine genaue Analyse der um das Ereignis herum aufgenommenen Betriebsdaten möglich ist. Dazu ist im Backendsystem ein entsprechendes Modul 9 vorgesehen. Zudem können vom Backendsystem Schnittstellen 10 zu allen möglichen Systemen zur Verfügung gestellt werden. Auch Funktionen 11 zur Konvertierung von Sprache in Text und Schnittstellen 12 zu "BigData" können vorgesehen sein. Beliebige weitere Module 13 sind möglich. Mit der Datenübertragung an das Backend hat der Nutzer die Möglichkeit, alle gespeicherten Daten des Systems über das Internet an das Backend zu senden. Nach erfolgreichem Senden können die Daten vom CAN-Bus Tracker gelöscht werden.Another component of the system is the backend system in the data cloud 7, which is accessible via a radio connection 8. Large computer and storage capacities are available here, so that a precise analysis of the operating data recorded around the event is possible. For this purpose, a corresponding module 9 is provided in the backend system. In addition, the backend system can provide interfaces 10 to all possible systems. Functions 11 for converting speech into text and interfaces 12 to “Big Data” can also be provided. Any other modules 13 are possible. By transferring data to the backend, the user has the opportunity to send all of the system's stored data to it via the Internet Backend to send. After successful sending, the data can be deleted from the CAN bus tracker.

In Figur 2 ist die Struktur der auf dem Smartphone laufenden Applikation gezeigt. Zunächst bietet die Applikation dem Nutzer 14 vier verschiedene Menüpunkte: Unter Menüpunkt 15 kann der Nutzer 14 die gespeicherten Betriebsdaten an das Backend übertragen, wobei die Daten aus dem Smartphone eigenen Speicher 16 stammen. Unter Menüpunkt 16 kann der Nutzer die Aufzeichnung von GPS Daten starten, die dann den gespeicherten Betriebsdaten auf dem Zeitstrahl entsprechend zugeordnet werden. Menüpunkt 17 bietet die zentrale Eingabemöglichkeit, mit der der Startbefehl zum Einfrieren der Betriebsdaten aus dem rollierenden Speicher und die Aufnahme der Betriebsdaten in den linearen Speicher gestartet wird. Die Betriebsdaten wereden in den Speicher 16 transferriert. Unter Menüpunkt 18 bewerkstelligt der Nutzer die Aufnahme zusätzlicher daten. Über ein ihm dargebotenes Textfeld 19 kann er eine Texteingabe machen. Zudem kann er eine Aufnahme mit einer Fotokamera 20, einem Mikrofon 21 oder einer Videokammera 22 veranlassen. Die jeweils aufgenommen Daten werden ebenfalls in den Speicher 16 transferriert.In Figure 2 The structure of the application running on the smartphone is shown. First, the application offers the user 14 four different menu items: Under menu item 15, the user 14 can transfer the stored operating data to the backend, whereby the data comes from the smartphone's own memory 16. Under menu item 16, the user can start recording GPS data, which is then assigned to the stored operating data on the timeline. Menu item 17 offers the central input option with which the start command for freezing the operating data from the rolling memory and the recording of the operating data into the linear memory is started. The operating data is transferred to the memory 16. Under menu item 18 the user can record additional data. He can enter text via a text field 19 presented to him. He can also initiate a recording with a photo camera 20, a microphone 21 or a video camera 22. The data recorded in each case is also transferred to the memory 16.

Claims (6)

  1. A method for recording operational data in a motor vehicle (1) in operation, wherein the operational data to be recorded are recorded by means of sensors located on the motor vehicle (1), wherein the sensors or their evaluation modules are connected in data-conducting manner with a memory unit (2) via a common CAN bus, and wherein the operational data are recorded in the memory unit (2),
    wherein the operational data are recorded within a time interval of predefinable length,
    wherein the time interval is compiled from a first subinterval ΔT1 and a second subinterval ΔT2,
    wherein the first subinterval ΔT1 is recorded with a ring memory, which records the operational data continuously during operation and upon reaching its storage capacity overwrites the recording starting from the beginning,
    wherein the time interval is fixed at a temporally fixed point with a start command,
    wherein the first subinterval occurs before the fixed point and the second subinterval occurs after the fixed point,
    wherein at the start command the current memory content of the ring memory is copied to a separate memory as the first subinterval,
    wherein the memory content of the ring memory defines the length of the first subinterval and correspondingly the start time point of the time interval,
    wherein the operational data recorded from the fixed point until the end time point as the second subinterval are appended to the separate memory as a temporally linear data sequence, and wherein the operational data from the two subintervals are coupled temporally one after the other,
    wherein a linear data recording that forms the second subinterval is carried out as a real-time recording of the data exchanged via the CAN bus,
    wherein the operational data are recorded on the time axis within the entire time interval,
    characterized in that
    the end time point of the time interval is defined by a user preference, and the temporal resolution of the recording of the operational data is preset by a user preference, wherein a higher resolution enables more operational data per time interval to be recorded by the sensors and stored in memory.
  2. The method according to one of the preceding claims,
    characterized in that
    the operational data recorded within the time interval are transmitted to a smartphone (3) via a short-range radio link (4), in particular via WLAN or Bluetooth, and stored there for further processing by an application.
  3. The method according to Claim 2,
    characterized in that
    the start command is generated by the application on the smartphone (3) and sent to the system over the short-range radio link (4).
  4. The method according to Claim 3,
    characterized in that
    additional data in the form of image data, text data or audio data are recorded at certain time points by means of the smartphone (3) and assigned to the recorded operational data at corresponding time points.
  5. The method according to Claim 4,
    characterized in that
    the operational data, optionally with the assigned additional data, are sent by means of the application from the smartphone via a radio link (8), in particular via WLAN or Bluetooth, to a backend system (7) for evaluation.
  6. A system configured to carry out the method according to any one of the preceding Claims 1 - 5.
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