Rain sensor having frost sensing function
First Claim
1. A rain sensor having a frost sensing function, the rain sensor being attached to a windshield glass of a vehicle, comprising:
- a casing provided with a frost sensing region and an air passage formed by recessing a part of a surface of the casing which is attached to the windshield glass to contact indoor air of the vehicle;
a light emitting unit configured to emit light such that the light is totally reflected from an exterior side surface of the windshield glass and the frost sensing region;
a light receiving unit that receives the light reflected totally and outputs signals; and
a control unit that receives the signals from the light receiving unit and analyzes a condition of raindrops on the exterior side surface of the glass and a condition of frost generated on an interior side surface of the windshield glass,wherein the air passage is formed by recessing a same surface as the frost sensing region, and connects an interior of the vehicle and the frost sensing region such that the indoor air is introduced into the frost sensing region through the air passage.
1 Assignment
0 Petitions
Accused Products
Abstract
A rain sensor has a frost sensing function, and is attached to a windshield glass of a vehicle. The frost sensor includes a casing provided with a frost sensing region formed by recessing a part of the casing to contact indoor air; a light emitting unit that emits light such that the light is incident on the windshield glass; a light receiving unit that receives the light emitted from the light emitting unit and reflected from the windshield glass and the frost sensing region; and a control unit that outputs the light received by the light receiving unit as a control signal and activates a wiper and an air conditioner of the vehicle.
4 Citations
7 Claims
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1. A rain sensor having a frost sensing function, the rain sensor being attached to a windshield glass of a vehicle, comprising:
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a casing provided with a frost sensing region and an air passage formed by recessing a part of a surface of the casing which is attached to the windshield glass to contact indoor air of the vehicle; a light emitting unit configured to emit light such that the light is totally reflected from an exterior side surface of the windshield glass and the frost sensing region; a light receiving unit that receives the light reflected totally and outputs signals; and a control unit that receives the signals from the light receiving unit and analyzes a condition of raindrops on the exterior side surface of the glass and a condition of frost generated on an interior side surface of the windshield glass, wherein the air passage is formed by recessing a same surface as the frost sensing region, and connects an interior of the vehicle and the frost sensing region such that the indoor air is introduced into the frost sensing region through the air passage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification