DRIVE RECORDER
First Claim
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1. 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.
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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.
73 Citations
19 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. 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.
Specification