Vehicle data analysis apparatus, vehicle data analysis method, and defect diagnosis apparatus
First Claim
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1. A vehicle data analysis apparatus for analyzing vehicle data indicating time-series changes of a state of a vehicle, the apparatus comprising:
- a storage device in which a plurality of the vehicle data obtained from the vehicle are accumulated as data to be analyzed;
a computing section configured to uncover a data fluctuation in each of the plurality of the vehicle data accumulated in the storage device that results from a mechanical or control-related abnormality in a vehicle control system and calculate an amount of change per unit time of the vehicle data; and
a recognizing section configured to recognize, based on a computation result obtained by the computing section, vehicle data to be subject to a diagnosis of the abnormality in the vehicle as a diagnosis target by excluding the data including the amount of change smaller than a threshold showing the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data,wherein the recognizing section is configured to use the threshold set to exclude the data fluctuation resulting from a human factor.
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Abstract
A vehicle data analysis apparatus analyzes vehicle data that indicates chronological change of a vehicle state. The vehicle data analysis apparatus is provided with a computing unit and a recognition unit. The computing unit is configured to make obvious data fluctuation accompanying the development, in the vehicle data, of mechanical or control-related fault in a vehicle control system. The recognition unit is configured to recognize the vehicle data to be considered during vehicle fault diagnosis on the basis of a result of computation by the computing unit.
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Citations
17 Claims
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1. A vehicle data analysis apparatus for analyzing vehicle data indicating time-series changes of a state of a vehicle, the apparatus comprising:
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a storage device in which a plurality of the vehicle data obtained from the vehicle are accumulated as data to be analyzed; a computing section configured to uncover a data fluctuation in each of the plurality of the vehicle data accumulated in the storage device that results from a mechanical or control-related abnormality in a vehicle control system and calculate an amount of change per unit time of the vehicle data; and a recognizing section configured to recognize, based on a computation result obtained by the computing section, vehicle data to be subject to a diagnosis of the abnormality in the vehicle as a diagnosis target by excluding the data including the amount of change smaller than a threshold showing the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data, wherein the recognizing section is configured to use the threshold set to exclude the data fluctuation resulting from a human factor. - View Dependent Claims (2, 3, 4)
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5. A vehicle data analysis apparatus for analyzing vehicle data indicating time-series changes of a state of a vehicle, the apparatus comprising:
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a storage device in which a plurality of the vehicle data obtained from the vehicle are accumulated as data to be analyzed; a computing section configured to uncover a data fluctuation in each of the plurality of the vehicle data accumulated in the storage device that results from a mechanical or control-related abnormality in a vehicle control system, wherein as the computation, the computing section performs a computation for obtaining statistical distribution of the vehicle data stored in the storage device; and a recognizing section configured to; recognize, based on a computation result obtained by the computing section, vehicle data to be subject to a diagnosis of the abnormality in the vehicle as a diagnosis target by excluding vehicle data deviating from a median in the obtained statistical distribution showing the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data, and extract vehicle data that has a relatively large deviation in the recognized vehicle data from the storage device as the diagnosis target vehicle data, wherein the recognizing section is configured to use a threshold set to exclude the data fluctuation from a human factor in excluding vehicle data deviating from the median. - View Dependent Claims (6, 7, 8)
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9. A vehicle data analysis apparatus for analyzing vehicle data indicating time-series changes of a state of a vehicle, the apparatus comprising:
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a storage device in which a plurality of the vehicle data obtained from the vehicle are accumulated as data to be analyzed, the vehicle data including a sensor dataset and a control dataset; a computing section configured to uncover a data fluctuation in each of the plurality of the vehicle data accumulated in the storage device that results from a mechanical or control-related abnormality in a vehicle control system and obtain, in the computation, a difference between the sensor dataset and the control dataset correlated with the sensor dataset; and a recognizing section configured to; recognize, based on a computation result obtained by the computing section, vehicle data to be subject to a diagnosis of the abnormality in the vehicle as a diagnosis target by excluding a sensor dataset and a control dataset whose difference is not equal to or greater than a threshold showing the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data, and recognize the diagnosis target vehicle data based on the obtained difference, wherein the recognizing section is configured to use the threshold set to exclude the data fluctuation resulting from a human factor. - View Dependent Claims (10, 11)
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12. A vehicle data analysis method for analyzing vehicle data indicating time-series changes of a state of a vehicle using a vehicle data analysis apparatus, the method comprising:
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accumulating a plurality of the vehicle data obtained from the vehicle in a storage device as data to be analyzed; uncovering a data fluctuation in each of the plurality of the vehicle data that results from a mechanical or control-related abnormality in a vehicle control system; calculating an amount of change per unit time of the vehicle data; identifying the vehicle data as a diagnosis target to diagnose the abnormality in the vehicle by excluding the data including the amount of change smaller than a threshold showing the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data; and using the threshold set to exclude the data fluctuation resulting from a human factor. - View Dependent Claims (13)
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14. A vehicle data analysis method for analyzing vehicle data indicating time-series changes of a state of a vehicle using a vehicle data analysis apparatus, the method comprising:
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accumulating a plurality of the vehicle data obtained from the vehicle in a storage device as data to be analyzed, wherein the vehicle data includes, as data reflecting a characteristic of a driver'"'"'s operation of the vehicle, a sensor dataset and a control dataset, the sensor dataset indicating changes of a value detected by a sensor that detects the state of the vehicle, and the control dataset reflecting changes of the sensor dataset; uncovering a data fluctuation in each of the plurality of the vehicle data that results from a mechanical or control-related abnormality in a vehicle control system; and identifying the vehicle data as a diagnosis target to diagnose the abnormality in the vehicle by excluding the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data, wherein the identifying includes; excluding a sensor dataset and a control dataset whose difference is not equal to or greater than a threshold, and identifying, as the diagnosis target, vehicle data that includes a data fluctuation based on a factor different from the driver'"'"'s vehicle operation of the vehicle, and using the threshold set to exclude the data fluctuation resulting from a human factor. - View Dependent Claims (15, 16)
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17. A vehicle data analysis method for analyzing vehicle data indicating time-series changes of a state of a vehicle using a vehicle data analysis apparatus, the method comprising:
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accumulating a plurality of the vehicle data obtained from the vehicle in a storage device as data to be analyzed; uncovering a data fluctuation in each of the plurality of the vehicle data that results from a mechanical or control-related abnormality in a vehicle control system, wherein the uncovering is to obtain statistical distribution of the stored vehicle data; and identifying the vehicle data as a diagnosis target to diagnose the abnormality in the vehicle by excluding the data fluctuation resulting from a driver'"'"'s operation of the vehicle from the data fluctuation included in the vehicle data, wherein the identifying includes; excluding vehicle data deviating from a median in the vehicle data represented as a statistical distribution and identifying vehicle data that has a relatively large deviation among the recognized vehicle data as the diagnosis target vehicle data, and using a threshold set to exclude the data fluctuation resulting from a human factor in excluding vehicle data deviating from the median.
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Specification