Automobile drive recorder
First Claim
1. An automobile drive recorder adapted to continuously take an image of a scene around an automobile by using a monitoring camera installed in the automobile, and, if a detection signal indicating an occurrence of an abnormal driving state is output by an abnormal state detection sensor, record image data of the scene for a period with a particular length around the time of the occurrence of the abnormal driving state, together with additional information associated with the driving state, into a record memory as drive record data, the automobile drive recorder comprising:
- a magnetic sensor serving as the abnormal state detection sensor adapted to detect a magnetic field in a close region around the automobile;
approaching vehicle detection means for detecting an abnormally approaching vehicle by detecting a change at a rate greater than a predetermined value in the signal level of the detection signal output by the magnetic sensor; and
frame rate switching means for, if an abnormally approaching vehicle is detected, switching the a frame rate at which image data is recorded in a record memory from a normal low frame rate to a high frame rate and maintaining the high frame rate for a predetermined period.
1 Assignment
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Accused Products
Abstract
In an automobile drive recorder, if a detection signal indicating an occurrence of an abnormal driving state is output by an abnormal state detection sensor, image data of a scene taken by a monitoring camera is recorded for a period with a particular length together with additional information associated with the driving state into a record memory as drive record data. The automobile drive recorder includes a magnetic sensor serving as the abnormal state detection sensor adapted to detect a magnetic field in a close region around the automobile, approaching vehicle detection means for detecting an abnormally approaching vehicle by detecting a change at a rate greater than a predetermined value in the signal level of the detection signal output by the magnetic sensor, and frame rate switching means for controlling the frame rate at which to record the image data.
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Citations
11 Claims
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1. An automobile drive recorder adapted to continuously take an image of a scene around an automobile by using a monitoring camera installed in the automobile, and, if a detection signal indicating an occurrence of an abnormal driving state is output by an abnormal state detection sensor, record image data of the scene for a period with a particular length around the time of the occurrence of the abnormal driving state, together with additional information associated with the driving state, into a record memory as drive record data, the automobile drive recorder comprising:
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a magnetic sensor serving as the abnormal state detection sensor adapted to detect a magnetic field in a close region around the automobile;
approaching vehicle detection means for detecting an abnormally approaching vehicle by detecting a change at a rate greater than a predetermined value in the signal level of the detection signal output by the magnetic sensor; and
frame rate switching means for, if an abnormally approaching vehicle is detected, switching the a frame rate at which image data is recorded in a record memory from a normal low frame rate to a high frame rate and maintaining the high frame rate for a predetermined period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification