Object recognition system
First Claim
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1. An object recognition system comprising:
- a plurality of passive responder circuits responsive to various frequencies each including an LC circuit with a coil having a plurality of taps and series connected capacitor,a transceiver having a loop for producing and transmitting a single interrogation pulse at repeated intervals through said transceiver loop and receiving and decoding the echoed characteristic single frequency from the passive responder circuits, said transceiver including antenna pulse providing means and echo signal receiving means, andwherein the presence of an object having a responder may be detected by the echoed frequency received by the transceiver from the responder only when the object is present.
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Abstract
This invention relates to resonant LC responders that are placed inside objects such as toys. The device includes an interrogation or base unit which sends a pulse and passive responders which reply with their unique frequency which is sensed by the base unit. The base unit senses the frequency and triggers a response in the play pattern of the object such as speaking or turning on a motor. The invention can discriminate multiple responders based on their frequency or location. Further, the device can interface with active responders as well. The invention provides a low cost, simple device to provide recognition particularly at a distance in interactive toys.
198 Citations
27 Claims
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1. An object recognition system comprising:
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a plurality of passive responder circuits responsive to various frequencies each including an LC circuit with a coil having a plurality of taps and series connected capacitor, a transceiver having a loop for producing and transmitting a single interrogation pulse at repeated intervals through said transceiver loop and receiving and decoding the echoed characteristic single frequency from the passive responder circuits, said transceiver including antenna pulse providing means and echo signal receiving means, and wherein the presence of an object having a responder may be detected by the echoed frequency received by the transceiver from the responder only when the object is present. - 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)
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24. An object recognition system comprising:
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a plurality of passive responder circuits responsive to various frequencies each including an LC circuit with a coil having a plurality of taps and series connected capacitor, a transceiver having a plurality of loops for producing and transmitting a single interrogation pulse at repeated intervals through said transceiver loops and receiving and decoding the echoed characteristic single frequency from the passive responder circuits, said transceiver including antenna pulse providing means and echo signal receiving means, and wherein the presence of an object having a responder may be detected by the echoed frequency received by the transceiver from the responder and said system further including; a microprocessor to control the transceiver; the transceiver includes at least two receiving loops to provide an orthogonal pickup pattern wherein at least one of said loops will continue to sense the object correctly, said loops being activated one at a time. - View Dependent Claims (25, 26, 27)
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Specification