Detuning detection and compensation for inductive coupling systems
AssigneeAssa Abloy AB
InventorHans-Juergen Pirch
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Abstract
This disclosure describes techniques for operating an inductive coupling reader. The techniques include operations comprising: detecting a change in a resonance frequency of the inductive coupling reader; comparing the change in the resonance frequency to a threshold; determining that the change in the resonance frequency falls outside the threshold; and activating a compensation circuit to offset the change in the resonance frequency of the inductive coupling reader in response to determining that the change in the resonance frequency falls outside the threshold.
Claims20
A method for operating an inductive coupling reader, the method comprising:
- detecting a change in a resonance frequency of the inductive coupling reader by determining that an amount of current being driven to the inductive coupling reader is greater or less than an expected amount of current by a given amount;
- and
- activating a compensation circuit to offset the change in the resonance frequency of the inductive coupling reader in response to detecting the change in the resonance frequency.
A system comprising:
- an inductive coupling reader comprising one or more processors configured to perform operations comprising:
- detecting a change in a resonance frequency of the inductive coupling reader by determining that an amount of current being driven to the inductive coupling reader is greater or less than an expected amount of current by a given amount;
- and
- activating a compensation circuit to offset the change in the resonance frequency of the inductive coupling reader in response to detecting the change in the resonance frequency.
A non-transitory machine-readable medium comprising non-transitory machine-readable instructions that, when executed by one or more processors, configure the one or more processors to perform operations comprising:
- detecting a change in a resonance frequency of an inductive coupling reader by determining that an amount of current being driven to the inductive coupling reader is greater or less than an expected amount of current by a given amount;
- and
- activating a compensation circuit to offset the change in the resonance frequency of the inductive coupling reader in response to detecting the change in the resonance frequency.
Dependencies are inferred from the claim text.