MATERIAL-DISCERNING PROXIMITY SENSING
First Claim
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1. A material-discerning proximity sensing device, comprisingan antenna that is arranged to radiate a radio-frequency signal;
- a capacitive sensor that is arranged to detect a change in capacitance of the capacitive sensor and that is arranged to receive the radio-frequency signal; and
an electrical quantity sensor that is arranged to detect a change of the received radio-frequency signal.
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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.
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Citations
20 Claims
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1. A material-discerning proximity sensing device, comprising
an antenna that is arranged to radiate a radio-frequency signal; -
a capacitive sensor that is arranged to detect a change in capacitance of the capacitive sensor and that is arranged to receive the radio-frequency signal; and an electrical quantity sensor that is arranged to detect a change of the received radio-frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A material-discerning proximity sensing system, comprising:
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an antenna that is arranged to radiate a radio-frequency signal; a capacitive sensor that is arranged to detect a change in capacitance of the capacitive sensor and that is arranged to receive the radio-frequency signal; a electrical quantity sensor that is arranged to detect a change of the received radio-frequency signal; and a processor that is arranged to monitor detected changes of the received radio-frequency signal and in response to the detected changes of the received radio-frequency signal determine whether a valid proximity detection has occurred. - View Dependent Claims (15, 16)
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17. A method for material-discerning proximity sensing, comprising:
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radiating a radio-frequency signal using an antenna; detecting a change in capacitance of a capacitive sensor; receiving the radio-frequency signal using the capacitive sensor; detecting a change of the received radio-frequency signal; monitoring the detected changes of the received radio-frequency signal; and determining whether a valid proximity detection has occurred in response to the detected changes of the received radio-frequency signal. - View Dependent Claims (18, 19, 20)
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Specification