Object detection by signal field mapping
First Claim
Patent Images
1. An object detection system for a vehicle comprising:
- an emitter mounted to transmit a signal within a defined field, said defined field adjacent a closure path of a moveable closure member;
a receiver to receive said signal as transmitted within said defined field; and
a controller in communication with said receiver, said controller operable to construct a map signature of said signal received by said receiver, said map signature having a first graphical shape representative of known obstructions normally within said defined field, said first graphical shape representative of said defined field when said defined field is clear of unknown objects, said controller operable to construct a second graphical shape in response to an unknown object entering within said defined field, variation from said first graphical shape indicative of said unknown object.
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Abstract
An object detection system includes an emitter, a receiver, and a controller adjacent a window assembly which typically includes a moveable glass member and a frame. In operation the emitter transmits the electromagnetic through a defined field adjacent a closure path of a moveable glass member. The controller constructs a map of the signal received by the receiver such that insertion of an object within the defined field produces a variation in the map. The controller halts or reverses the movement of the moveable glass member to prevent trapping the object between the closing moveable glass member and the frame.
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Citations
20 Claims
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1. An object detection system for a vehicle comprising:
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an emitter mounted to transmit a signal within a defined field, said defined field adjacent a closure path of a moveable closure member; a receiver to receive said signal as transmitted within said defined field; and a controller in communication with said receiver, said controller operable to construct a map signature of said signal received by said receiver, said map signature having a first graphical shape representative of known obstructions normally within said defined field, said first graphical shape representative of said defined field when said defined field is clear of unknown objects, said controller operable to construct a second graphical shape in response to an unknown object entering within said defined field, variation from said first graphical shape indicative of said unknown object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A moveable closure assembly comprising:
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a moveable closure member moveable through a closure path; an emitter mounted to transmit a signal within a defined field, said defined field adjacent said closure path; a receiver to receive said signal as transmitted within said defined field; and a controller in communication with said receiver, said controller operable to construct a map signature of said signal received by said receiver, said map signature having a first graphical shape representative of known obstructions normally within said defined field such that insertion of an unknown object within said defined field produces a variation from said first graphical shape. - View Dependent Claims (13, 14, 15)
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16. A method of detecting an object in a moveable closure path comprising the steps of:
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(1) transmitting a signal within a defined field, said defined field adjacent a closure path of a moveable closure member; (2) receiving said signal as transmitted within said defined field; (3) mapping said signal received in said step (2) as a first graphical shape representative of known obstructions normally within said defined field; and (4) identifying a variation in said graphical shape of said step (3). - View Dependent Claims (17, 18, 19, 20)
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Specification