Data Recorder For Vehicle
First Claim
1. A data recorder, comprising:
- a data acquiring unit that acquires data for use in a vehicle;
a comparison unit that compares previously acquired data with presently acquired data;
a judgment unit that judges whether the presently acquired data is recorded in response to a comparison result from the comparison unit;
a dataset management unit that creates a present dataset including present data and a recording flag for the present data when the judgment unit judges that the present data is recorded, and records at least a recording flag of the presently acquired data and does not record the presently acquired data when the judgment unit judges that the presently acquired data is not recorded; and
a recording unit that records the present dataset created by the data set management unit in a recording device.
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Accused Products
Abstract
A data recorder for vehicle compares a difference between previously acquired data and presently acquired data with a data threshold value which is set to every abnormal occurrence for a time-series data recorded temporarily in RAM, and determines whether the data is recorded in a data recording device, when various types of data associated with the abnormal occurrence is recorded. Specifically, if it is necessary to record the data with a fine accuracy, a setting of the threshold value for the data is made small, and if it is necessary to record the data with a coarse accuracy, a setting thereof for the data is made large. Accordingly, the data recording accuracy is appropriately set in correspond with the abnormal occurrence, therefore, the cause of the abnormal occurrence is ascertained later without using a recording capacity wastefully.
18 Citations
10 Claims
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1. A data recorder, comprising:
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a data acquiring unit that acquires data for use in a vehicle; a comparison unit that compares previously acquired data with presently acquired data; a judgment unit that judges whether the presently acquired data is recorded in response to a comparison result from the comparison unit; a dataset management unit that creates a present dataset including present data and a recording flag for the present data when the judgment unit judges that the present data is recorded, and records at least a recording flag of the presently acquired data and does not record the presently acquired data when the judgment unit judges that the presently acquired data is not recorded; and a recording unit that records the present dataset created by the data set management unit in a recording device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification