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US 2011/0254676 A1Published application
Drive recorder
AssigneeRohm Co., Ltd.
InventorKyoji Marumoto
Life of this patent
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Abstract
A drive recorder of the invention includes a trigger judgment circuit that calculates, with respect to acceleration data of a vehicle, first and second moving averages as moving averages of two different time series, and that generates a trigger signal according to a result of comparing a differential value of the first and second moving averages or an absolute value of the differential value with a predetermined threshold value.
Claims19
A drive recorder, comprising:
- a trigger judgment circuit that calculates, with respect to acceleration data of a vehicle, first and second moving averages as moving averages of two different time series, and that generates a trigger signal according to a result of comparing a differential value or an absolute differential value of the first and second moving averages with a predetermined threshold value.
A trigger judgment program that is read and executed by a microcomputer incorporated in a drive recorder,
- the trigger judgment program making the microcomputer function as a trigger judgment circuit
- that calculates, from acceleration data of a vehicle, first and second moving averages of two different time series, and
- that generates a trigger signal according to a result of comparing a differential value or an absolute differential value of the first and second moving averages with a predetermined threshold value.
Dependencies are inferred from the claim text.