Antenna structure for communicating with an electronic tag implanted in a pneumatic tire
First Claim
1. An antenna detecting a signal from an electronic tag implanted in a sidewall or a bead of a pneumatic tire, wherein the pneumatic tire is placed flat on a conveyor belt, and the implanted electronic tag is provided with a winding for the transmission of said signal by electromagnetic coupling, said conveyor belt making it possible to move said pneumatic tire in a linear direction of movement in front of said antenna, said antenna comprising:
- a single winding of numerous turns wound on a support;
a central part to be located approximately at the center of the conveyor belt;
two lateral edges to be placed approximately on each side of the conveyor belt,strands placed so that flux generated around said strands describe a loop whose plane is perpendicular to the direction of movement at the central part, then changes gradually in orientation to become parallel to the direction of movement, while always remaining perpendicular to the conveyor belt, on moving from said central part toward each of the lateral edges of the antenna.
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Accused Products
Abstract
The identification of pneumatic tires by electromagnetic coupling with a nsponder embedded in the thickness of the pneumatic tire is made possible by a suitable interrogation antenna so that, regardless of the position of the transponder in the pneumatic tire, a position which is unknown, the coupling is always of the same quality. Such an antenna may take the form of a figure eight or of a closed torus.
87 Citations
15 Claims
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1. An antenna detecting a signal from an electronic tag implanted in a sidewall or a bead of a pneumatic tire, wherein the pneumatic tire is placed flat on a conveyor belt, and the implanted electronic tag is provided with a winding for the transmission of said signal by electromagnetic coupling, said conveyor belt making it possible to move said pneumatic tire in a linear direction of movement in front of said antenna, said antenna comprising:
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a single winding of numerous turns wound on a support; a central part to be located approximately at the center of the conveyor belt; two lateral edges to be placed approximately on each side of the conveyor belt, strands placed so that flux generated around said strands describe a loop whose plane is perpendicular to the direction of movement at the central part, then changes gradually in orientation to become parallel to the direction of movement, while always remaining perpendicular to the conveyor belt, on moving from said central part toward each of the lateral edges of the antenna. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna for detecting a signal from an electronic tag implanted in a sidewall or a bead of a pneumatic tire, wherein the pneumatic tire is placed flat on a conveyor belt, and the implanted electronic tag is provided with a winding for transmission of said signal by electromagnetic coupling, said conveyor belt making it possible to move said pneumatic tire in a predetermined movement direction in front of said antenna, said antenna comprising:
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a support; strands formed on the support to generate magnetic flux; wherein the support has a shape so that flux generated forms a loop whose plane is perpendicular to the predetermined movement direction at a central part of the antenna, then changes gradually in orientation to become parallel to the predetermined movement direction when moving from said central part of the antenna toward lateral edges of the antenna. - View Dependent Claims (7, 8, 9)
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10. A system for detecting a presence of a pneumatic tire comprising:
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a conveyor belt along which said pneumatic tire moves in a predetermined movement direction; an electronic tag implanted in said pneumatic tire; an antenna located along said predetermined movement direction so that said pneumatic tire passes past said antenna, said antenna having a shape to generate magnetic flux in a plane perpendicular to said predetermined movement direction at a central portion of the antenna and to generate magnetic flux that changes gradually in orientation to be parallel to said predetermined movement direction at lateral edges of the antenna. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification