Vehicular reflective optical sensor
First Claim
1. A vehicular reflective optical sensor comprising:
- a control unit including a processor that is configured or programmed to include;
a light-emission control unit that controls emission of light at prescribed intervals from a light-emitting unit that is located on an exterior panel of a vehicle towards a detection region set outside the vehicle, anda computation unit that tests for a threshold-exceeded state in which an amount of light in a light reflection received from the detection region by a light-receiving unit exceeds a prescribed detection threshold, and that outputs a detection-confirmation signal if it is detected that a detection target enters the detection region, whereinthe control unit processor is configured or programmed to use, as the detection threshold, a sum of a predetermined fixed value and an adjustment value including a summary statistic, andthe adjustment value is calculated, based on amounts of light in an appropriate number of light reflections preceding the light reflection on which the comparison is being performed, at the time of reception of the light reflection on which the comparison is being performed.
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Accused Products
Abstract
The purpose of this invention is to provide a vehicular reflective optical sensor that has improved control reliability. Said vehicular reflective optical sensor is provided with a control unit (6) that: emits detection light (3) at prescribed intervals from a light-emitting unit (2) on an exterior panel of a vehicle towards a detection region (1) set outside said vehicle; tests for a threshold-exceeded state in which the amount of light in a light reflection (4) received from the detection region (1) by a light-receiving unit (5) exceeds a prescribed detection threshold; and, if it is detected that a detection target has entered the detection region (1), outputs a detection-confirmation signal. The control unit (6) uses, as the aforementioned detection threshold, the sum of a predetermined fixed value and an adjustment value comprising a summary statistic for the amounts of light in an appropriate number of light reflections (4) preceding the light reflection (4) on which the comparison is being performed.
37 Citations
10 Claims
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1. A vehicular reflective optical sensor comprising:
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a control unit including a processor that is configured or programmed to include; a light-emission control unit that controls emission of light at prescribed intervals from a light-emitting unit that is located on an exterior panel of a vehicle towards a detection region set outside the vehicle, and a computation unit that tests for a threshold-exceeded state in which an amount of light in a light reflection received from the detection region by a light-receiving unit exceeds a prescribed detection threshold, and that outputs a detection-confirmation signal if it is detected that a detection target enters the detection region, wherein the control unit processor is configured or programmed to use, as the detection threshold, a sum of a predetermined fixed value and an adjustment value including a summary statistic, and the adjustment value is calculated, based on amounts of light in an appropriate number of light reflections preceding the light reflection on which the comparison is being performed, at the time of reception of the light reflection on which the comparison is being performed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification