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US 10,474,307 B2Granted
Material-discerning proximity sensing
AssigneeTexas Instruments Incorporated
InventorAlan Henry Leek
Life of this patent
Estimating the term…
Abstract
A material-discerning proximity sensor is arranged to include an antenna that is arranged to radiate a radio-frequency signal. A capacitive sensor is arranged to detect a change in capacitance of the capacitive sensor and to receive the radio-frequency signal. An electrical quantity sensor is arranged to detect a change of the received radio-frequency signal.
Claims20
A system comprising:
- an antenna configured to produce an electromagnetic radio-frequency signal;
- a capacitive sensor configured to receive the electromagnetic radio-frequency signal;
- and
- a processor coupled to the antenna and the capacitive sensor, the processor configured to:
- detect a change in the electromagnetic radio-frequency signal as received by the capacitive sensor;
- and
- determine whether a valid proximity detection has occurred based on the change in the electromagnetic radio-frequency signal as received by the capacitive sensor.
4 more elements
A method comprising:
- radiating, by an antenna, an electromagnetic radio-frequency signal;
- receiving, by a capacitive sensor, the electromagnetic radio-frequency signal;
- detecting, by a processor, a change in the electromagnetic radio-frequency signal received by the capacitive sensor;
- monitoring, by the processor, the change in the electromagnetic radio-frequency signal received by the capacitive sensor;
- and
- determining, by the processor, whether a valid proximity detection has occurred, based on the change in the electromagnetic radio-frequency signal received by the capacitive sensor.
3 more elements
Dependencies are inferred from the claim text.