Intruding metal detection method for induction type power supply system and related supplying-end module
First Claim
1. An intruding metal detection method for a supplying-end module of an induction type power supply system, the supplying-end module comprising a supplying-end coil, the intruding metal detection method comprising:
- interrupting at least one driving signal of the induction type power supply system to stop driving the supplying-end coil during a measurement period, to generate a coil signal of the supplying-end coil;
measuring a plurality of peaks of the coil signal within a plurality of consecutive oscillation cycles of the coil signal, to obtain a plurality of peak trigger voltages, respectively;
calculating a first attenuation parameter according to a first peak trigger voltage and a second peak trigger voltage among the plurality of peak trigger voltages; and
comparing the first attenuation parameter with a first threshold value to determine whether there is an intruding metal existing in a power supply range of the induction type power supply system.
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Abstract
An intruding metal detection method for a supplying-end module of an induction type power supply system having a supplying-end coil includes interrupting at least one driving signal of the induction type power supply system to stop driving the supplying-end coil during a measurement period, to generate a coil signal of the supplying-end coil; measuring a plurality of peaks of the coil signal within a plurality of consecutive oscillation cycles of the coil signal, to obtain a plurality of peak trigger voltages, respectively; calculating a first attenuation parameter according to a first peak trigger voltage and a second peak trigger voltage among the plurality of peak trigger voltages; and comparing the first attenuation parameter with a first threshold value to determine whether there is an intruding metal existing in a power supply range of the induction type power supply system.
47 Citations
20 Claims
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1. An intruding metal detection method for a supplying-end module of an induction type power supply system, the supplying-end module comprising a supplying-end coil, the intruding metal detection method comprising:
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interrupting at least one driving signal of the induction type power supply system to stop driving the supplying-end coil during a measurement period, to generate a coil signal of the supplying-end coil; measuring a plurality of peaks of the coil signal within a plurality of consecutive oscillation cycles of the coil signal, to obtain a plurality of peak trigger voltages, respectively; calculating a first attenuation parameter according to a first peak trigger voltage and a second peak trigger voltage among the plurality of peak trigger voltages; and comparing the first attenuation parameter with a first threshold value to determine whether there is an intruding metal existing in a power supply range of the induction type power supply system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A supplying-end module for an induction type power supply system for performing an intruding metal detection method, the supplying-end module comprising:
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a supplying-end coil; a resonant capacitor, coupled to the supplying-end coil, for performing resonance together with the supplying-end coil; at least one power driver unit, coupled to the supplying-end coil and the resonant capacitor, for sending at least one driving signal to the supplying-end coil to drive the supplying-end coil to generate energies, and interrupting the at least one driving signal to stop driving the supplying-end coil during a measurement period to generate a coil signal of the supplying-end coil; a signal receiver, coupled to the supplying-end coil, for receiving the coil signal from the supplying-end coil; and a processor, coupled to the signal receiver, for performing the following steps; measuring a plurality of peaks of the coil signal within a plurality of consecutive oscillation cycles of the coil signal, to obtain a plurality of peak trigger voltages, respectively; calculating a first attenuation parameter according to a first peak trigger voltage and a second peak trigger voltage among the plurality of peak trigger voltages; and comparing the first attenuation parameter with a first threshold value to determine whether there is an intruding metal existing in a power supply range of the induction type power supply system. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification