Device for monitoring and measuring distance
First Claim
1. A device for monitoring distance comprising:
- an interrogator;
a transponder in wireless communication with the interrogator, the transponder having a signaling device that is activated based on the distance between the interrogator and transponder.
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Abstract
A device for monitoring distances having an interrogator and a transponder in wireless communication with the interrogator, the transponder having a signaling device that is activated based on the distance between the interrogator and transponders. The interrogator sends an encoded signal to the transponder and determines the distance to the transponder based on the delay of the transponder'"'"'s response. The interrogator instructs the transponder to activate a signaling device when the distance exceeds a predetermined setting. The present invention is directed towards applications that require one-foot precision and accuracy.
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Citations
20 Claims
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1. A device for monitoring distance comprising:
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an interrogator;
a transponder in wireless communication with the interrogator, the transponder having a signaling device that is activated based on the distance between the interrogator and transponder. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. A device for monitoring distance comprising:
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an interrogator having a signaling device;
a transponder in wireless communication with the first interrogator, wherein the signaling device is activated based on the distance between the interrogator and transponder. - View Dependent Claims (8, 9, 10, 11, 12)
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14. A device for measuring distance comprising:
- an interrogator;
a transponder in wireless communication with the interrogator, wherein a signal is sent between the interrogator and the transponder to determine a distance between the interrogator and the transponder. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- an interrogator;
Specification