Method and a device for optically detecting the position of an object by measuring light reflected by that object
First Claim
Patent Images
1. An optical detection method of determining the position of an object in a particular detection area of a surface, the method comprising:
- a preliminary step of disposing in the vicinity of said detection area and on the same side thereof relative to the object at least four elements including two emitters of light and at least two receivers of light adapted to cover the detection area, each emitter being adapted to emit light in such a way that it does not hit said surface in the detection area, said emitters and receivers being disposed in an alternating and regular arrangement, the method further comprises;
a step during which one of said receiver measures the quantity of light reflected by the object when the object is illuminated by one of said emitters for at least two different emitter—
receiver pairs,a step of calculating at least two characteristic values from said measured values, wherein, as emitters and receivers are disposed in the alternating and regular arrangement, a characteristic value is calculated for each emitter by averaging the values measured by the receivers on each side of said emitter when only said emitter is turned on, anda step of determining at least one position of the object by directly reading a table indexed by said at least two characteristic values, the content of said table being predetermined and set before said measurement step.
1 Assignment
0 Petitions
Accused Products
Abstract
This detection method comprises: a step during which a receiver measures the quantity of light reflected by an object when the object is illuminated by an emitter for at least two different emitter—receiver pairs on the same side relative to the object, a step of calculating at least two characteristic values from the measured values, and a step of determining at least one position of the object by directly reading a table indexed by the two characteristic values, the content of said table being predetermined and set before said measurement step.
-
Citations
39 Claims
-
1. An optical detection method of determining the position of an object in a particular detection area of a surface, the method comprising:
-
a preliminary step of disposing in the vicinity of said detection area and on the same side thereof relative to the object at least four elements including two emitters of light and at least two receivers of light adapted to cover the detection area, each emitter being adapted to emit light in such a way that it does not hit said surface in the detection area, said emitters and receivers being disposed in an alternating and regular arrangement, the method further comprises; a step during which one of said receiver measures the quantity of light reflected by the object when the object is illuminated by one of said emitters for at least two different emitter—
receiver pairs,a step of calculating at least two characteristic values from said measured values, wherein, as emitters and receivers are disposed in the alternating and regular arrangement, a characteristic value is calculated for each emitter by averaging the values measured by the receivers on each side of said emitter when only said emitter is turned on, and a step of determining at least one position of the object by directly reading a table indexed by said at least two characteristic values, the content of said table being predetermined and set before said measurement step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An optical detection method of determining the position of an object in a particular detection area of a surface, the method comprising:
-
a preliminary step of disposing in the vicinity of said detection area and on the same side thereof relative to the obiect at least four elements including two emitters of light and at least two receivers of light adapted to cover the detection area, each emitter being adapted to emit light in such a way that it does not hit said surface in the detection area, said emitters and receivers being disposed in an alternating and regular arrangement, the method further comprising; a step during which one of said receiver measures the quantity of light reflected by the obiect when the object is illuminated by one of said emitters for at least two different emitter—
receiver pairs,a step of calculating at least two characteristic values from said measured values, wherein, as emitters and receivers are disposed in the alternating and regular arrangement, a characteristic value is calculated for each receiver by averaging the values measured by that receiver when the emitters situated on each side of said receiver are turned on successively, a step of determining at least one position of the obiect by directly reading a table indexed by said at least two characteristic values, the content of said table being determined and set before said measurement step. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. An optical detection device for determining the position of an object on a particular detection area of a surface, said device comprising, disposed in the vicinity of said particular area, and on the same side thereof with respect to the object, at least four elements including:
-
at least two emitters of light adapted to emit light so that it does not hit said surface in the detection area, and at least two receivers one receiver of light adapted to cover said detection area and to measure a value representative of the quantity of light reflected by the object, said emitters and receivers being disposed in an alternating and regular arrangement, said device further comprising control means for turning on said emitter and processor means adapted; to obtain and store for at least two different emitter—
receiver pairs the quantity of light reflected by said object and measured by said receiver when the object is illuminated by said emitter,to calculate at least two characteristic values from said measured values, wherein as emitters and receivers are disposed in the alternating and regular arrangement, a characteristic value is calculated for each emitter by averaging the values measured by the receivers on each side of said emitter when only said emitter is turned on, and to determine at least one position of the object by directly reading a table indexed by said at least two characteristic values, the content of said table being predetermined and set before said step of obtaining the quantity of light reflected by said object. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. An optical detection device for determining the position of an object on a particular detection area of a surface, said device comprising, disposed in the vicinity of said particular area, and on the same side thereof with respect to the object, at least four elements including:
-
at least two emitter of light adapted to emit light so that it does not hit said surface in the detection area, and at least two receivers of light adapted to cover said detection area and to measure a value representative of the guantity of light reflected by the obiect, said emitters and receivers being disposed in an alternating and regular arrangement, said device further comprising control means for turning on said emitter and processor means adapted; to obtain and store for at least two different emitter—
receiver pairs the quantity of light reflected by said obiect and measured by said receiver when the object is illuminated by said emitter,to calculate at least two characteristic values from said measured values, wherein as emitters and receivers are disposed in an alternating and regular arrangement, a characteristic value is calculated for each receiver by averaging the values measured by that receiver when the emitters situated on each side of said receiver are turned on successively, and to determine at least one position of the obiect by directly reading a table indexed by said at least two characteristic values, the content of said table being predetermined and set before said step of obtaining the guantity of light reflected by said obiect. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
-
Specification