Device for detecting the crossing of a road marking for motor vehicle
First Claim
Patent Images
1. A device for detecting crossing of a horizontal lane demarcation mark of a carriageway for motor vehicles, wherein the device includes:
- (a) at least one box to be placed under a vehicle and enclosing master and slave means for projecting two light beams onto a carriageway in two distinct zones; and
(b) distinct means for picking up each of the two light beams after reflection onto the carriageway.
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Abstract
The present invention concerns a device for detecting crossing of a horizontal land demarcation marker of a carriageway for motor vehicles, characterized in that it includes at least one box (2) to be placed under the vehicle and enclosing means for projecting two light beams (4, 6) onto the carriageway (8) in two distinct zones (10, 12) that do not overlap, and distinct means for picking up each of the two light beams (14, 16) after reflection onto the carriageway (8).
13 Citations
30 Claims
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1. A device for detecting crossing of a horizontal lane demarcation mark of a carriageway for motor vehicles, wherein the device includes:
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(a) at least one box to be placed under a vehicle and enclosing master and slave means for projecting two light beams onto a carriageway in two distinct zones; and (b) distinct means for picking up each of the two light beams after reflection onto the carriageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A device for detecting crossing of a horizontal lane demarcation mark of a carriageway for motor vehicles, wherein the device includes:
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(a) at least one box to be placed under a vehicle and enclosing master and slave means for projecting two light beams onto a carriageway in two distinct zones; and (b) distinct means for picking up each of the two light beams after reflection onto the carriageway, wherein the at least one box, exhibiting a general axis of symmetry, encloses i. two light sources each emitting a light beam in the direction of the carriageway; ii. at least one photo-sensor for detecting light after reflection on the carriageway; iii. two first optical devices whose optical axes are inclined at a first value with respect to the general axis of symmetry of the box, each of the two first optical devices disposed on a path of one of the light beams as the one light beam exits the corresponding optical source so as to project the two light beams onto the carriageway in two distinct zones; and iv. two second optical devices whose optical axes are inclined at a second value with respect to the general axis of symmetry of the box are disposed on the path of the light beams after the light beams have been reflected onto the carriageway and before the light beams reach the at least one photo-sensor, wherein the light sources and the photo-sensors are mounted by SMD or flip-chip on a printed circuit board.
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30. A device for detecting crossing of a horizontal lane demarcation mark of a carriageway for motor vehicles, wherein the device includes:
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(a) at least one box to be placed under a vehicle and enclosing master and slave means for projecting two light beams onto a carriageway in two distinct zones; and (b) distinct means for picking up each of the two light beams after reflection onto the carriageway, wherein the at least one box, exhibiting a general axis of symmetry, encloses i. two light sources each emitting a light beam in the direction of the carriageway; ii. at least one photo-sensor for detecting light after reflection on the carriageway; iii. two first optical devices whose optical axes are inclined at a first value with respect to the general axis of symmetry of the box, each of the two first optical devices disposed on a path of one of the light beams as the one light beam exits the corresponding optical source so as to project the two light beams onto the carriageway in two distinct zones; and iv. two second optical devices whose optical axes are inclined at a second value with respect to the general axis of symmetry of the box are disposed on the path of the light beams after the light beams have been reflected onto the carriageway and before the light beams reach the at least one photo-sensor, wherein the first two optical devices and the second two optical devices include a screen disposed obliquely in front of the light sources and pierced with a hole.
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Specification