EP0462464B1 - Motor vehicle data acquisition device - Google Patents

Motor vehicle data acquisition device Download PDF

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Publication number
EP0462464B1
EP0462464B1 EP91109374A EP91109374A EP0462464B1 EP 0462464 B1 EP0462464 B1 EP 0462464B1 EP 91109374 A EP91109374 A EP 91109374A EP 91109374 A EP91109374 A EP 91109374A EP 0462464 B1 EP0462464 B1 EP 0462464B1
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EP
European Patent Office
Prior art keywords
data
vehicle
microcomputer
accident
hazard warning
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EP91109374A
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German (de)
French (fr)
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EP0462464A3 (en
EP0462464A2 (en
Inventor
Ove Ing. Salomonsson (Th)
Helmut Dipl.-Ing. Bacic (Fh)
Martin Dipl.-Ing. Gruler (Fh)
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Digital Kienzle Computersysteme GmbH and Co KG
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Mannesmann Kienzle GmbH
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME 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
    • G07C5/00Registering or indicating the working of vehicles
    • G07C5/08Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841Registering performance data
    • G07C5/085Registering performance data using electronic data carriers

Definitions

  • the invention relates to a device for data acquisition in a motor vehicle with a microcomputer and a data memory, in which data are continuously written in a clock-controlled manner, and with means for manually entering information characterizing an accident or a situation close to an accident.
  • the data acquisition in motor vehicles includes the recording of travel-dependent data, such as the distances covered, the speeds traveled, the engine speeds and the fuel consumption, but also the recording of critical and safety-relevant data of operating conditions, for example with regard to the tire pressure Brake pad thicknesses or axle loads.
  • travel-dependent data such as the distances covered, the speeds traveled, the engine speeds and the fuel consumption
  • critical and safety-relevant data of operating conditions for example with regard to the tire pressure Brake pad thicknesses or axle loads.
  • the demand for verifiability of compliance with the working time guidelines, the so-called social regulations also makes the determination of the working time data, i. H. driving times, standby times and rest periods required.
  • the data acquisition should also enable the detection and evaluation of accidents and accident-related situations.
  • H. offer records with a significantly higher resolution of the speed and / or route values or acceleration values compared to the recording cycle for the assessment of transport performance and compliance with traffic and working time regulations.
  • Special accident recorders in which accident data are preferably determined by means of acceleration sensors and stored for a relatively short time based on time, whereby additional status information about, for example, brake actuation, turn signal function and lighting should be recorded as aids to interpretation, then save the accident data permanently when accelerations that actually act on the vehicle actually take effect there are still possible accelerations caused by road conditions and driving dynamics, d. H. for real, accident-related bumps. This procedure is useful because it can be used to limit the processor and memory capacity to accident situations. H. to situations that can cause damage and injuries and are therefore relevant to insurance.
  • a gap in the data acquisition could be closed if there were a device that allows manual triggering of a storage of accident-characteristic trip data or only the assignment of information characterizing an accident or an accident-related situation to continuously recorded vehicle operating data.
  • the invention is therefore based on the task, light and Means that can be operated without a doubt for manually triggering an accident data storage or for entering accident-characteristic information, which are characterized by particular simplicity and can therefore be produced with little effort, which can be arranged in a simple manner even after retrofitting and which offer high functional reliability.
  • the solution to the problem is characterized in that the key of the hazard warning light transmitter of the motor vehicle is used as an input element, that at least one signal line of the turn signal lamps on the right side of the vehicle and one signal line of the turn signal lights on the left side of the vehicle is assigned an AND operation and that the AND condition is present the microcomputer identifies the actuation of the hazard warning flashers in the data memory after a certain delay.
  • a preferred embodiment provides that a retriggerable, monostable multivibrator is connected to an AND gate that links the signal lines of the turn signal lamps on the right and left vehicle sides, that a timer determining the run-on time is provided, which is started simultaneously with the switching of the monostable multivibrator and that the microcomputer controls the storage of data recorded before and after actuating the button of the hazard warning flasher if the monostable flip-flop has not yet tilted back after the run-on time has been reached.
  • the invention solves the problem in a satisfactory manner and also offers the advantage of being able to use an actuator that is already present in the motor vehicle and is easy to operate, namely the button of the hazard warning lamp, for manually triggering a storage process.
  • the idea of obtaining the trigger signal simply by ANDing the blinking circuits on the right and left sides of the vehicle is of a fundamental nature. It uses an encoder present in the vehicle and thus offers a solution an exceptionally low effort.
  • Using the button of the hazard warning flashers also results in a logical relationship insofar as the hazard warning lights have to be activated in the event of accidents or vehicle breakdowns in order to alert other road users to a dangerous situation.
  • This situation is automatically identified in the data memory, in the simplest case an assignment of a "0" or a "1" to a data record, and the driver is informed by an optical and / or acoustic signal that the identification is pending or is taking place is so that he can take the opportunity to prevent or delete the storage.
  • FIGURE 1 denotes a hazard warning flasher of a motor vehicle, which comprises an illuminated key 2, a pulse generator 3 and a control lamp 4.
  • the hazard warning lamp 1 is connected to the ignition switch (not shown) as part of the signal system of the motor vehicle in question via fuses 5 and 6. With 7 the flashing switch of the motor vehicle is designated.
  • Lights 8 and 9, 10 and 11 represent the turn signals on the right and left side of the vehicle.
  • the data acquisition device in the selected application example an accident recorder, is connected via lines 13 and 14 to the blinking signal lines or the relevant outputs of the hazard warning lights 1.
  • An input circuit 15 is used to adjust the voltage level with regard to the flashing signals as well as further status or status signals, such as lights switched on or off or indicators or brakes actuated or not actuated and supplied via lines 16, 17 and 18, useful for an accident interpretation and the like
  • the level of the monostable multivibrator 22 is continuously interrogated in the system clock by the microcomputer 19 and compared with a timer which provides a specific follow-up time and is implemented in software in the microcomputer 19.
  • the microcomputer 19 is assigned a frequency-to-digital converter 23 for the preparation of the acceleration values measured in the X- and Y-directions as well as for measured angles of rotation and a data memory (RAM) 24 which is used for the application with a timer and is equipped with a backup battery and thus offers the prerequisites for a memory module that can be removed from the accident recorder.
  • RAM data memory
  • the microcomputer 19, the external data memory 24 and the frequency-to-digital converter 23 are in a conventional manner via an address bus 25, a data bus 26, control lines 27 and the selection lines 29, 30 ising starting from an address decoder 28 linked together.
  • the flow diagram FIGURE 2 shows that after switching on the ignition of the vehicle (31), the device first carries out a self-test (32) according to the program, in which the sensors and the status inputs are also checked. This is followed by a query (33) as to which memory area in the data memory 24 ring memory I, II, etc., for storing (34) a data record consisting of at least status data and "a" and " ⁇ " measured values.
  • a trigger vector is calculated (35) using a suitable computing algorithm, and the data set is then checked (36) whether the conditions for an accident-related impact are met or not. If they are fulfilled, a timer is started (37), which specifies a follow-up time for the storage of further data records.
  • the data volume in the relevant ring memory I or II etc. is permanently stored (39) and when the device is switched off (40) it is switched off (41) in such a way that the microcomputer 19 carries out a specific switch-off routine and after a certain follow-up period, the storing of data stops and ensures that no new data are written into the data memory when the ignition is switched on again.
  • This state is expediently communicated to the driver by an optical and / or acoustic signal when the ignition is switched off and on again.
  • the routine is followed by (42) to check whether the button 2 of the hazard warning lamp 1 has been pressed. If button 2 has been pressed, a timer is started (43). After a set follow-up time (44), for example after 30 seconds, the microcomputer 19 interrupts the writing of further data records and saves the data content of the ring buffer operated up to this point in time, for example of the ring buffer I (45). At the same time, a switchover to a free ring memory, for example ring memory II or a ring memory released for overwriting, is carried out (46) and the data record that follows is written into the new ring memory.
  • the microcomputer 19 remains in the previous routine and, with the ignition (47) still switched on, clears the counted-on run-on time counter (48).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Control Of Electric Motors In General (AREA)
  • Recording Measured Values (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

It is proposed to complement a device for data acquisition in a vehicle by means for manually inputting information which characterises an accident or an accident-like situation. In particular, there is provision for the storage of this information to be triggered by actuating the key (2) of the hazard warning signal generator (1) of the respective motor vehicle. For this purpose, the signalling lines of the flasher lights (8, 9, 10, 11) of the right-hand and left-hand vehicle side are logically connected via an AND element (21) and the output level of a retriggerable, monostable multivibrator (22) connected downstream is continuously interrogated by a microcomputer over a specific hunting time. If the level is maintained, the microprocessor (19) controls the permanent storage of identification data in the data memory (24) of the relevant data acquisition system. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zur Datenerfassung in einem Kraftfahrzeug mit einem Mikrocomputer und einem Datenspeicher, in welchen taktgesteuert fortlaufend Daten eingeschrieben werden, sowie mit Mitteln zum manuellen Eingeben einer einen Unfall oder eine unfallnahe Situation kennzeichnenden Information.The invention relates to a device for data acquisition in a motor vehicle with a microcomputer and a data memory, in which data are continuously written in a clock-controlled manner, and with means for manually entering information characterizing an accident or a situation close to an accident.

Die Datenerfassung in Kraftfahrzeugen umfaßt im Hinblick auf eine Beurteilung der Transportleistung das Aufzeichnen von fahrtabhängigen Daten, wie zurückgelegte Strecken, die dabei gefahrenen Geschwindigkeiten, die Motordrehzahlen sowie den Kraftstoffverbrauch, aber auch das Festhalten kritischer und sicherheitsrelevanter Daten von Betriebszuständen beispielsweise bezgl. des Reifendrucks, der Bremsbelagstärken oder der Achslasten. Die Forderung nach Überprüfbarkeit der Einhaltung der Arbeitszeitrichtlinien, der sog. Sozialvorschiften, macht ferner das Ermitteln der Arbeitszeitdaten, d. h. der Lenkzeiten, der Bereitschaftszeiten und Ruhezeiten erforderlich. Zusätzlich soll die Datenerfassung auch das Erkennen und Auswerten von Unfällen und unfallnahen Situationen ermöglichen, d. h. gegenüber dem Aufzeichnungstakt für die Beurteilung von Transportleistung und der Einhaltung von Verkehrs- und Arbeitszeitvorschriften Aufzeichnungen mit einer wesentlich höheren Auflösung der Geschwindigkeits- und/oder Streckenwerte oder von Beschleunigungswerten bieten.With regard to an assessment of the transport performance, the data acquisition in motor vehicles includes the recording of travel-dependent data, such as the distances covered, the speeds traveled, the engine speeds and the fuel consumption, but also the recording of critical and safety-relevant data of operating conditions, for example with regard to the tire pressure Brake pad thicknesses or axle loads. The demand for verifiability of compliance with the working time guidelines, the so-called social regulations, also makes the determination of the working time data, i. H. driving times, standby times and rest periods required. In addition, the data acquisition should also enable the detection and evaluation of accidents and accident-related situations. H. offer records with a significantly higher resolution of the speed and / or route values or acceleration values compared to the recording cycle for the assessment of transport performance and compliance with traffic and working time regulations.

So ist es, abgesehen von ausschließlich als Unfallschreiber bzw. Unfallspeicher ausgebildeten Geräten üblich, in dem Datenspeicher von Datenerfassungsgeräten beispielsweise auch von herkömmlichen Fahrtschreibern, wenn diese mit einem Datenspeicher ausgerüstet sind, oder in solchen, die für die Ausgabe von Druckbelegen und die Benutzung fahrerbezogener Datenkarten vorgesehen sind, einen Speicherbereich vorzusehen, in dem Strecken- und/oder Zeitwerte mit höherer Auflösung eingeschrieben und fortlaufend wieder gelöscht werden, so daß lediglich ein festgelegter Restweg bzw. Letztzeitbereich mit gegebenenfalls einer Nachlaufzeit erfaßt ist.Thus, apart from devices designed exclusively as accident recorders or accident memories, it is common in the data memory of data acquisition devices, for example also of conventional tachographs, if these are equipped with a data memory, or in those for the output of print receipts and the use of driver-related data cards are provided one To provide a memory area in which distance and / or time values are written in with a higher resolution and continuously deleted again, so that only a specified remaining distance or last time area with possibly a follow-up time is recorded.

Spezielle Unfallschreiber, bei denen vorzugsweise mittels Beschleunigungssensoren Unfalldaten ermittelt und zeitbasiert relativ kurzzeitig abgespeichert werden, wobei zusätzliche Zustandsinformationen über beispielsweise Bremsbetätigung, Blinkerfunktion und Beleuchtung als Interpretationshilfen erfaßt werden sollten, speichern die Unfalldaten dann fest ab, wenn am Fahrzeug tatsächlich Beschleunigungen wirksam werden, die außerhalb noch möglicher, durch Straßenbeschaffenheit und Fahrdynamik hervorgerufener Beschleunigungen liegen, d. h. bei echten, unfallbedingten Stößen. Diese Vorgehensweise ist deshalb zweckmäßig, weil damit die Prozessor- und Speicherplatzkapazität auf Unfallsituationen beschränkt werden kann, d. h. auf solche Situationen, die Schäden und Verletzungen hervorrufen können und somit versicherungsrelevant sind.Special accident recorders, in which accident data are preferably determined by means of acceleration sensors and stored for a relatively short time based on time, whereby additional status information about, for example, brake actuation, turn signal function and lighting should be recorded as aids to interpretation, then save the accident data permanently when accelerations that actually act on the vehicle actually take effect there are still possible accelerations caused by road conditions and driving dynamics, d. H. for real, accident-related bumps. This procedure is useful because it can be used to limit the processor and memory capacity to accident situations. H. to situations that can cause damage and injuries and are therefore relevant to insurance.

Demgegenüber sind Verkehrssituationen bekannt, bei welchen es nicht zu einem Zusammenstoß kommt oder die Stoßenergie nicht ausreicht, um die automatisch wirksam werdende Registrierung auszulösen, es andererseits aber wünschenswert ist, daß diese Unfälle oder diese unfallnahen Situationen für eine eventuelle spätere Rekonstruktion festgehalten werden können, beispielsweise in dem Fall, in dem ein Fahrer beschuldigt wird, durch zweifelhaftes Manövrieren seines Fahrzeuges einen Unfall eines anderen Fahrzeuges oder eine Kollision zweier anderer Fahrzeuge verursacht zu haben. Umgekehrt kann das Fahrverhalten eines anderen Fahrzeuges zu einem verkehrsgefährdenden Ausweichmanöver, vor allem bei winterlichen Straßenverhältnissen zum Schleudern oder aber zu einem rettenden Ausweichen außerhalb der Straße führen, was in den meisten Fällen nicht ohne einen Schaden am Fahrzeug abläuft. Auch die Straße querendes Wild, überraschende Reaktionen eines Fahrradfahrers oder spielende Kinder können zu insbesondere auch für den nachfolgenden Verkehr gefährlichen Situationen führen, die nicht mit einem unfallcharakteristischen Stoß, der ein Festspeichern der betreffenden Fahrtdaten auslösen würde, abschließen. Wünschenswert ist ferner, daß bei einem Liegenbleiben eines Fahrzeuges infolge einer Panne diese Gefahrensituation durch Festhalten wenigstens von Kilometerstand und Uhrzeit dokumentierbar gemacht werden kann. Besonders kritisch sind Unfälle mit Personen, insbesondere mit Kindern oder älteren Menschen, die trotz relativ geringer Stoßenergie, die nicht mehr automatisch detektiert werden kann, oder auch ohne daß eine Berührung mit dem Fahrzeug erfolgt, d. h. lediglich durch Erschrecken, erhebliche körperliche Schäden zur Folge haben können.In contrast, traffic situations are known in which there is no collision or the impact energy is not sufficient to trigger the automatically effective registration, but on the other hand it is desirable that these accidents or these accident-related situations can be recorded for a possible later reconstruction, for example in the event that a driver is accused of causing an accident of another vehicle or a collision of two other vehicles by doubtful maneuvering of his vehicle. Conversely, the driving behavior of another vehicle can lead to a dangerous evasive maneuver, especially in wintry road conditions, to skidding or to a saving avoidance off-road, which in most cases does not take place without damage to the vehicle. Game crossing the street, surprising reactions of a cyclist or playing Children can, in particular, lead to situations that are dangerous for the following traffic, which do not end with an accident-characteristic impact that would trigger a storage of the relevant trip data. It is also desirable that if a vehicle breaks down as a result of a breakdown, this dangerous situation can be made documentable by recording at least the mileage and time. Accidents with persons, especially with children or the elderly, are particularly critical which, despite relatively low impact energy, which can no longer be automatically detected, or even without contact with the vehicle, that is to say only by shock, result in considerable physical damage can.

Es steht somit außer Zweifel, daß es insbesondere in Kraftfahrzeugen, die ohnehin mit einer Einrichtung zur Datenerfassung ausgerüstet sind, vorteilhaft wäre, d. h. eine Lücke in der Datenerfassung geschlossen werden könnte, wenn eine Einrichtung vorhanden wäre, die ein manuelles Auslösen eines Festspeicherns von unfallcharakteristischen Fahrtdaten oder lediglich das Zuordnen einer einen Unfall oder eine unfallnahe Situation kennzeichnenden Information zu fortlaufend erfaßten Fahrzeugbetriebsdaten gestattet.There is therefore no doubt that it would be advantageous in particular in motor vehicles which are in any case equipped with a device for data acquisition, i. H. A gap in the data acquisition could be closed if there were a device that allows manual triggering of a storage of accident-characteristic trip data or only the assignment of information characterizing an accident or an accident-related situation to continuously recorded vehicle operating data.

Selbst wenn dafür Sorge getragen ist, daß der Fahrer die Möglichkeit hat, eine irrtümlich vorgenommene, ihn unter Umständen belastende Eingabe zu löschen, besteht für eine solche Einrichtung eine hohe Akzeptanzschwelle. Dies nicht allein deshalb, weil eine solche Einrichtung zwangsläufig zusätzliche Kosten verursacht, sondern weil die Mittel zum manuellen Eingeben bzw. Auslösen zumindest im haptischen Bereich des Fahrers angeordnet sein sollten, wo durch die von vornherein gegebene Häufung von Instrumenten, Signalanzeigemitteln und Betätigungselementen insbesondere für einen nachträglichen Einbau erhebliche Anordnungsprobleme bestehen.Even if care is taken to ensure that the driver has the possibility of deleting an entry which has been made by mistake and may be burdensome, there is a high acceptance threshold for such a device. This is not only because such a device inevitably causes additional costs, but because the means for manual input or triggering should be arranged at least in the haptic area of the driver, where due to the accumulation of instruments, signal display means and actuating elements given in advance, in particular for one subsequent installation, there are considerable arrangement problems.

Der Erfindung liegt somit die Aufgabe zugrunde, leicht und zweifelsfrei bedienbare Mittel für ein manuelles Auslösen einer Unfalldatenspeicherung bzw. für ein Eingeben unfallcharakteristischer Informationen vorzusehen, die sich durch besondere Einfachheit auszeichnen und somit mit geringem Aufwand hergestellt werden können, die auch bei nachträglichem Einbau auf einfache Weise angeordnet werden können und eine hohe Funktionssicherheit bieten.The invention is therefore based on the task, light and Means that can be operated without a doubt for manually triggering an accident data storage or for entering accident-characteristic information, which are characterized by particular simplicity and can therefore be produced with little effort, which can be arranged in a simple manner even after retrofitting and which offer high functional reliability.

Die Lösung der Aufgabe ist dadurch gekennzeichnet, daß als Eingabeelement die Taste des Warnblinkgebers des Kraftfahrzeuges dient, daß wenigstens einer Signalleitung der Blinkleuchten der rechten Fahrzeugseite und einer Signalleitung der Blinkleuchten der linken Fahrzeugseite eine UND-Verknüpfung zugeordnet ist und daß beim Vorliegen der UND-Bedingung der Mikrocomputer nach einer bestimmten Nachlaufzeit die Betätigung der Warnblinkgebers im Datenspeicher kennzeichnet.The solution to the problem is characterized in that the key of the hazard warning light transmitter of the motor vehicle is used as an input element, that at least one signal line of the turn signal lamps on the right side of the vehicle and one signal line of the turn signal lights on the left side of the vehicle is assigned an AND operation and that the AND condition is present the microcomputer identifies the actuation of the hazard warning flashers in the data memory after a certain delay.

Ein bevorzugtes Ausführungsbeispiel sieht vor, daß einem die Signalleitungen der Blinkleuchten der rechten und linken Fahrzeugseite verknüpfenden UND-Glied eine retriggerbare, monostabile Kippstufe nachgeschaltet ist, daß ein die Nachlaufzeit bestimmender Zeitgeber vorgesehen ist, welcher gleichzeitig mit dem Schalten der monostabilen Kippstufe gestartet wird und daß der Mikrocomputer ein Festspeichern von vor und nach dem Betätigen der Taste des Warnblinkgebers erfaßten Daten dann steuert, wenn nach dem Erreichen der Nachlaufzeit die monostabile Kippstufe noch nicht zurückgekippt ist.A preferred embodiment provides that a retriggerable, monostable multivibrator is connected to an AND gate that links the signal lines of the turn signal lamps on the right and left vehicle sides, that a timer determining the run-on time is provided, which is started simultaneously with the switching of the monostable multivibrator and that the microcomputer controls the storage of data recorded before and after actuating the button of the hazard warning flasher if the monostable flip-flop has not yet tilted back after the run-on time has been reached.

Die Erfindung löst die gestellte Aufgabe in zufriedenstellender Weise und bietet zusätzlich den Vorteil, ein im Kraftfahrzeug ohnehin vorhandenes und leicht bedienbares Betätigungsorgan, nämlich die Taste des Warnblinkgebers, für das manuelle Auslösen eines Speichervorganges nutzen zu können. Der Gedanke, das Auslösesignal lediglich durch eine UND-Verknüpfung der Blinkstromkreise der rechten und linken Fahrzeugseite zu gewinnen, ist von grundsätzlicher Art. Er nutzt einen im Fahrzeug vorhandenen Geber und bietet somit eine Lösung mit einem außergewöhnlich geringen Aufwand. Abgesehen von einer geräteseitigen Pegelanpassung und einer Signal-Aufbereitungslogik, die hardware- oder softwaremäßig realisiert sein kann, sind lediglich zwei Leitungen zwischen dem Datenerfassungsgerät und den Blinkstromkreisen der rechten und der linken Fahrzeugseite zu verdrahten, vorzugsweise an den L-, R-Ausgängen des Warnblinkgebers anzuschließen, so daß auch ein Selbsteinbau ohne weiteres möglich ist. Mit der Verwendung der Taste des Warnblinkgebers ergibt sich auch eine logische Beziehung insofern als die Warnblinkanlage bei Unfällen oder Fahrzeugpannen ohnehin in Funktion gesetzt werden muß, um die anderen Verkehrsteilnehmer auf eine gefährliche Situation aufmerksam zu machen. Dabei wird automatisch eine Kennzeichnung dieser Situation im Datenspeicher, im einfachsten Falle ein Zuordnen einer "0" oder einer "1" zu einem Datensatz, vorgenommen und der Fahrer durch ein optisches und/oder akustisches Signal darauf aufmerksam gemacht, daß die Kennzeichnung ansteht oder erfolgt ist, so daß er die Möglichkeit wahrnehmen kann, die Speicherung zu verhindern oder zu löschen.The invention solves the problem in a satisfactory manner and also offers the advantage of being able to use an actuator that is already present in the motor vehicle and is easy to operate, namely the button of the hazard warning lamp, for manually triggering a storage process. The idea of obtaining the trigger signal simply by ANDing the blinking circuits on the right and left sides of the vehicle is of a fundamental nature. It uses an encoder present in the vehicle and thus offers a solution an exceptionally low effort. Apart from a level adjustment on the device side and signal processing logic that can be implemented in hardware or software, only two lines have to be wired between the data acquisition device and the blinking circuits on the right and left side of the vehicle, preferably at the L, R outputs of the hazard warning lights to connect, so that self-installation is also possible. Using the button of the hazard warning flashers also results in a logical relationship insofar as the hazard warning lights have to be activated in the event of accidents or vehicle breakdowns in order to alert other road users to a dangerous situation. This situation is automatically identified in the data memory, in the simplest case an assignment of a "0" or a "1" to a data record, and the driver is informed by an optical and / or acoustic signal that the identification is pending or is taking place is so that he can take the opportunity to prevent or delete the storage.

Im folgenden sei die Erfindung anhand der beigefügten Zeichnungen näher erläutert. Es zeigen:

  • FIGUR 1 ein Blockschaltbild eines als Anwendungsbeispiel gewählten Unfallschreibers,
  • FIGUR 2 ein Flußdiagramm des Funktionsablaufes des Unfallschreibers.
The invention is explained in more detail below with reference to the accompanying drawings. Show it:
  • 1 shows a block diagram of an accident recorder selected as an application example,
  • FIGURE 2 is a flow diagram of the operational sequence of the accident recorder.

In FIGUR 1 ist mit 1 ein Warnblinkgeber eines Kraftfahrzeuges bezeichnet, der eine beleuchtete Taste 2, einen Impulsgeber 3 und eine Kontrolleuchte 4 umfaßt. Der Warnblinkgeber 1 ist als Teil der Signalanlage des betreffenden Kraftfahrzeuges über Sicherungen 5 und 6 mit dem nicht dargestellten Zündschalter verbunden. Mit 7 ist der Blinkschalter des Kraftfahrzeuges bezeichnet. Die Leuchten 8 und 9, 10 und 11 stellen die Blinkleuchten der rechten und der linken Fahrzeugseite dar.In FIGURE 1, 1 denotes a hazard warning flasher of a motor vehicle, which comprises an illuminated key 2, a pulse generator 3 and a control lamp 4. The hazard warning lamp 1 is connected to the ignition switch (not shown) as part of the signal system of the motor vehicle in question via fuses 5 and 6. With 7 the flashing switch of the motor vehicle is designated. Lights 8 and 9, 10 and 11 represent the turn signals on the right and left side of the vehicle.

Das Datenerfassungsgerät, im gewählten Anwendungsbeispiel ein Unfallschreiber, ist über die Leitungen 13 und 14 mit den Blinksignalleitungen bzw. den betreffenden Ausgängen des Warnblinkgebers 1 verbunden. Eine Eingangsschaltung 15 dient der Spannungspegelanpassung sowohl bezüglich der Blinksignale als auch weiterer, für eine Unfallinterpretation nützlicher und über die Leitungen 16, 17 und 18 zugeführter Status- bzw. Zustandssignale, wie Licht ein-/ausgeschaltet oder Blinker oder Bremse betätigt oder nicht betätigt und dergl. Eine zwischen der Eingangsschaltung 15 und einem Mikrocomputer 19 angeordnete Signalaufbereitungslogik 20 umfaßt ein UND-Glied 21, eine diesem nachgeschaltete, monostabile Kippstufe 22, welche retriggerbar ausgebildet ist und eine die Blinkfrequenztoleranzen überbrückende Grundschaltzeit von beispielsweise t = 2 Sek. aufweist. Der Pegel der monostabilen Kippstufe 22 wird im Systemtakt vom Mikrocomputer 19 fortlaufend abgefragt und mit einem eine bestimmte Nachlaufzeit liefernden, im Mikrocomputer 19 softwaremäßig realisierten Zeitgeber verglichen.
Wie die FIGUR 1 ferner zeigt, sind dem Mikrocomputer 19 ein Frequenz-Digital-Wandler 23 für die Aufbereitung der in X- und Y-Richtung gemessenen Beschleunigungswerte sowie für Drehwinkelmeßwerte und ein Datenspeicher (RAM) 24 zugeordnet, welcher für den Anwendungsfall mit einem Zeitgeber und einer Pufferbatterie ausgerüstet ist und somit die Voraussetzungen für einen aus dem Unfallschreiber entnehmbaren Speichermodul bietet.
The data acquisition device, in the selected application example an accident recorder, is connected via lines 13 and 14 to the blinking signal lines or the relevant outputs of the hazard warning lights 1. An input circuit 15 is used to adjust the voltage level with regard to the flashing signals as well as further status or status signals, such as lights switched on or off or indicators or brakes actuated or not actuated and supplied via lines 16, 17 and 18, useful for an accident interpretation and the like A signal processing logic 20 arranged between the input circuit 15 and a microcomputer 19 comprises an AND gate 21, a monostable multivibrator 22 connected downstream thereof, which is designed to be retriggerable and has a basic switching time bridging the flashing frequency tolerances of, for example, t = 2 seconds. The level of the monostable multivibrator 22 is continuously interrogated in the system clock by the microcomputer 19 and compared with a timer which provides a specific follow-up time and is implemented in software in the microcomputer 19.
As FIGURE 1 also shows, the microcomputer 19 is assigned a frequency-to-digital converter 23 for the preparation of the acceleration values measured in the X- and Y-directions as well as for measured angles of rotation and a data memory (RAM) 24 which is used for the application with a timer and is equipped with a backup battery and thus offers the prerequisites for a memory module that can be removed from the accident recorder.

Der Mikrocomputer 19, der externe Datenspeicher 24 und der Frequenz-Digital-Wandler 23 sind über einen Adressbus 25, einen Datenbus 26, Steuerleitungen 27 und die von einem Adressdecoder 28 ausgehenden Auswahlleitungen 29, 30 ...... in an sich üblicher Weise miteinander verknüpft.The microcomputer 19, the external data memory 24 and the frequency-to-digital converter 23 are in a conventional manner via an address bus 25, a data bus 26, control lines 27 and the selection lines 29, 30 ...... starting from an address decoder 28 linked together.

Das Flußdiagramm FIGUR 2 zeigt, daß nach dem Einschalten der Zündung des Fahrzeuges (31) das Gerät programmgemäß zunächst einen Selbsttest vornimmt (32), bei dem auch die Sensoren und die Statuseingänge überprüft werden. Danach folgt eine Abfrage (33) dahingehend, welcher Speicherbereich im Datenspeicher 24 als Ringspeicher I, II usw. für das Abspeichern (34) eines wenigstens aus Zustandsdaten sowie "a" und "φ" Meßwerten bestehenden Datensatzes zugänglich ist. Nach dem Abspeichern des Datensatzes wird mittels eines geeigneten Rechenalgorithmus ein Triggervektor berechnet (35) und der Datensatz daraufhin überprüft (36), ob die Bedingungen für einen unfallbedingten Stoß erfüllt sind oder nicht. Sind sie erfüllt, wird ein Zeitgeber gestartet (37), der eine Nachlaufzeit für das Einspeichern weiterer Datensätze vorgibt. Ist die Nachlaufzeit erreicht (38), erfolgt ein Festspeichern (39) des im betreffenden Ringspeicher I bzw. II usw. befindlichen Datenumfangs und bei Ausschalten (40) ein Abschalten (41) des Gerätes derart, daß der Mikrocomputer 19 eine bestimmte Abschaltroutine durchführt und nach einer gewissen Nachlaufzeit das Einspeichern von Daten stoppt und dafür sorgt, daß beim Wiedereinschalten der Zündung keine neuen Daten in den Datenspeicher eingeschrieben werden.The flow diagram FIGURE 2 shows that after switching on the ignition of the vehicle (31), the device first carries out a self-test (32) according to the program, in which the sensors and the status inputs are also checked. This is followed by a query (33) as to which memory area in the data memory 24 ring memory I, II, etc., for storing (34) a data record consisting of at least status data and "a" and "φ" measured values. After the data set has been saved, a trigger vector is calculated (35) using a suitable computing algorithm, and the data set is then checked (36) whether the conditions for an accident-related impact are met or not. If they are fulfilled, a timer is started (37), which specifies a follow-up time for the storage of further data records. If the run-on time is reached (38), the data volume in the relevant ring memory I or II etc. is permanently stored (39) and when the device is switched off (40) it is switched off (41) in such a way that the microcomputer 19 carries out a specific switch-off routine and after a certain follow-up period, the storing of data stops and ensures that no new data are written into the data memory when the ignition is switched on again.

Zweckmäßigerweise wird dieser Zustand durch ein optisches und/oder akustisches Signal beim Aus- und Wiedereinschalten der Zündung dem Fahrer mitgeteilt.This state is expediently communicated to the driver by an optical and / or acoustic signal when the ignition is switched off and on again.

Ist die Stoßbedingung, die einen automatischen Speichervorgang auslöst, nicht erfüllt, so folgt im Routineablauf mit (42) die Prüfung, ob die Taste 2 des Warnblinkgebers 1 betätigt worden ist. Ist die Taste 2 betätigt worden, wird ein Zeitgeber gestartet (43). Nach einer festgesetzten Nachlaufzeit (44), beispielsweise nach 30 Sek., unterbricht der Mikrocomputer 19 das Einschreiben weiterer Datensätze und speichert den Dateninhalt des bis zu diesem Zeitpunkt betriebenen Ringspeichers, beispielsweise des Ringspeichers I, fest ab (45). Gleichzeitig wird ein Umschalten auf einen freien Ringspeicher, beispielsweise den Ringspeicher II oder einen zum Überschreiben freigegebenen Ringspeicher, vorgenommen (46) und der nachfolgend anstehende Datensatz in den neuen Ringspeicher eingeschrieben.If the impact condition that triggers an automatic storage process is not fulfilled, then the routine is followed by (42) to check whether the button 2 of the hazard warning lamp 1 has been pressed. If button 2 has been pressed, a timer is started (43). After a set follow-up time (44), for example after 30 seconds, the microcomputer 19 interrupts the writing of further data records and saves the data content of the ring buffer operated up to this point in time, for example of the ring buffer I (45). At the same time, a switchover to a free ring memory, for example ring memory II or a ring memory released for overwriting, is carried out (46) and the data record that follows is written into the new ring memory.

Wird die Nachlaufzeit nicht erreicht (44), d. h. der Fahrer hat die Warnblinkanlage noch während der Nachlaufzeit abgeschaltet, bleibt der Mikrocomputer 19 in der bisherigen Routine und löscht bei weiterhin eingeschalteter Zündung (47) den angezählten Nachlaufzeitzähler (48).If the overrun time is not reached (44), ie the driver If the hazard warning system has been switched off during the run-on time, the microcomputer 19 remains in the previous routine and, with the ignition (47) still switched on, clears the counted-on run-on time counter (48).

Der Vollständigkeit halber sei noch erwähnt, daß bezüglich der Datenverarbeitung von reinen Unfallschreibern,
Fahrtschreibern und anderen Fahrzeugdatenerfassungsgeräten je nach Informationsschwerpunkt eine Fülle von Organisationsformen denkbar sind und daß in jedem Falle die Zuordnung einer durch Betätigen der Taste der Warnblinkanlage auslösbaren und somit unfallrelevanten Information möglich und zweckmäßig ist.
For the sake of completeness, it should also be mentioned that with regard to the data processing of pure accident recorders,
Tachographs and other vehicle data acquisition devices, depending on the focus of information, a plethora of organizational forms are conceivable and that in any case the assignment of information which can be triggered by pressing the button of the hazard warning system and is thus relevant to the accident is possible and expedient.

Claims (4)

  1. Device for data capture in a motor vehicle having a microcomputer and a data store to which data is continuously written in clock-controlled manner, and having means for manually inputting information characterizing an accident or a near-accident situation, characterized in that the button (2) of the hazard warning transmitter (1) of the motor vehicle serves as the input element, in that an AND link is associated with at least one signal line of the indicator lamps (8, 9) on the right-hand side of the vehicle and one signal line of the indicator lamps (10, 11) on the left-hand side of the vehicle, and in that if the AND condition is fulfilled the microcomputer (19) marks the actuation of the hazard warning transmitter (1) in the data store (24) after a certain follow-on time.
  2. Device according to Claim 1, characterized in that the microcomputer (19) stores an absolute or relative value of the current real time as a mark of the actuating of the hazard warning transmitter (1) in the data store (24).
  3. Device according to Claim 1, characterized in that the microcomputer (19), as a mark of the actuation of the hazard warning transmitter (1), controls the permanent storage of the data of an area of the data store operated as a ring store.
  4. Device according to Claim 1, characterized in that a re-triggerable monostable element (22) is arranged downstream of an AND element (21) linking the signal lines of the indicator lamps (8, 9, 10, 11) on the right-hand and left-hand sides of the vehicle, in that a timing element determining the follow-on time is provided which is started at the same time as the monostable element (22) is switched, and in that the microcomputer (19) controls permanent storage of data captured before and after actuation of the button (2) of the hazard warning transmitter (1) if the monostable element (22) has not yet flipped back after the follow-on time has occurred.
EP91109374A 1990-06-19 1991-06-07 Motor vehicle data acquisition device Expired - Lifetime EP0462464B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4019507A DE4019507A1 (en) 1990-06-19 1990-06-19 DEVICE FOR DATA COLLECTION IN A MOTOR VEHICLE
DE4019507 1990-06-19

Publications (3)

Publication Number Publication Date
EP0462464A2 EP0462464A2 (en) 1991-12-27
EP0462464A3 EP0462464A3 (en) 1992-09-02
EP0462464B1 true EP0462464B1 (en) 1995-03-22

Family

ID=6408660

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Application Number Title Priority Date Filing Date
EP91109374A Expired - Lifetime EP0462464B1 (en) 1990-06-19 1991-06-07 Motor vehicle data acquisition device

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EP (1) EP0462464B1 (en)
JP (1) JP2525077Y2 (en)
AT (1) ATE120293T1 (en)
DE (2) DE4019507A1 (en)
ES (1) ES2071863T3 (en)
IE (1) IE912105A1 (en)
PT (1) PT98001B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2268608A (en) * 1992-06-10 1994-01-12 Norm Pacific Automat Corp Vehicle accident prevention and recording system
FR2712106A1 (en) * 1993-11-02 1995-05-12 Vallade Patrick Recording device of the type intended to be placed on an automobile road vehicle
DE19710393A1 (en) * 1997-03-13 1998-09-17 Bosch Gmbh Robert Vehicle data documentation method
DE10029401A1 (en) * 2000-06-15 2001-12-20 Pascal Munnix Event-dependent storage of vehicle system data involves triggering control device generating storage command(s) on detecting storage event, transmitting to recording unit
DE10317641A1 (en) * 2003-04-17 2004-11-11 Continental Aktiengesellschaft Device for storing accident-related data of a motor vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250487A (en) * 1978-10-27 1981-02-10 Arnold Robert D Vehicle speed recorder
DE3021997A1 (en) * 1980-06-12 1981-12-17 Kurt 8710 Kitzingen Frickel Hazard warning flashers for vehicles - are activated automatically by impact force on collision
DE3032432A1 (en) * 1980-08-28 1982-04-01 Alfred Teves Gmbh, 6000 Frankfurt Journey data recorder - clearly indicates motion before accident by using non-volatile memory and accident criteria evaluation
DE3248192A1 (en) * 1982-08-25 1984-03-01 Roland 7770 Überlingen Heubeck Device for recording data of a motor vehicle before an accident
DE3405757A1 (en) * 1983-02-26 1984-10-04 Edmund 7016 Gerlingen Zottnik ACCIDENT RECORDER
DE3416724A1 (en) * 1984-05-07 1985-11-07 Iraklis 6000 Frankfurt Laios Warning device for motor vehicles
DE3630448C1 (en) * 1986-09-06 1987-09-24 Daimler Benz Ag Direction indicator and hazard warning device for motor vehicles
DE3702718A1 (en) * 1987-01-30 1988-08-11 Bernd Lohmeyer Hazard warning light on a motor vehicle

Also Published As

Publication number Publication date
PT98001B (en) 1998-12-31
JPH0489484U (en) 1992-08-05
IE912105A1 (en) 1992-01-01
ATE120293T1 (en) 1995-04-15
DE59104979D1 (en) 1995-04-27
EP0462464A3 (en) 1992-09-02
JP2525077Y2 (en) 1997-02-05
DE4019507A1 (en) 1992-01-02
PT98001A (en) 1993-06-30
EP0462464A2 (en) 1991-12-27
ES2071863T3 (en) 1995-07-01

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