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Method of time-synchronized data transmission in induction type power supply system

  • US 9,048,881 B2
  • Filed: 06/05/2012
  • Issued: 06/02/2015
  • Est. Priority Date: 06/07/2011
  • Status: Active Grant
First Claim
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1. A method of time-synchronized data transmission in induction type power supply system to achieve transmission of data signals and power between a supplying-end module used to transmit power and a receiving-end module used to feed back data signals, the method comprising the steps of:

  • (a) starting program initialization by a supplying-end microprocessor and setting timing length of trigger pulse, start bit, logic state, end bit and data transmission loop and other functions following transmission of power from a power source of the supplying-end module;

    (b) setting detection signal output frequency by the supplying-end microprocessor with frequency converter program to stop output frequency to a power driver unit;

    (c) starting a standby timer by the supplying-end microprocessor and entering into sleeping and power-saving state after shutting down the output, and waking up upon completion of timing;

    (d) starting and transmitting the detection signal upon completion of standby timing to activate the receiving-end module close to the supplying-end coil and then starting a voltage comparator installed in the supplying-end microprocessor;

    (e) starting to count detection time and detecting if there is a trigger signal on signal analysis circuit with the voltage comparator in the supplying-end microprocessor;

    proceeding to step (h) if there is no trigger signal;

    otherwise, proceeding to step (f);

    (f) deciding that there is no receiving-end module close to the supplying-end module if no trigger signal is found in the detection period and preparing to enter into standby mode;

    (g) detecting the signal from the coil voltage detection circuit in the supplying-end microprocessor and checking if the voltage falls within the set range;

    proceeding to step (b) to reset the detection signal output frequency if the voltage does not fall within the set range;

    otherwise, proceeding to step (c) and shutting off the output;

    (h) transmitting a trigger signal from the timer to examine signal check flag and determine if a first trigger signal is delivered, proceeding to step (i) if not, otherwise proceeding to step (k);

    (i) deciding that the receiving-end module gets close to the supplying-end coil according to the first trigger signal and extending the detection signal transmission time to continuously transmit power to the receiving-end module through the supplying-end coil and make it operate;

    (j) marking the signal check flag as an issued trigger signal, starting the trigger signal timer to get ready for detecting the next trigger and proceeding to step (e);

    (k) sending a trigger signal from the time of the supplying-end microprocessor and checking if the start bit length is confirmed;

    proceeding to step (l) if the start bit length is not confirmed;

    otherwise, proceeding to step (m);

    (l) checking if the issue time of the current signal and time length of the first trigger signal conform with the range of the start bit length;

    proceeding to step (m) if yes, and proceeding to step (n) if not;

    (m) marking the start bit flag as confirmation completed, resetting and restarting the trigger signal timer to get ready for detecting the next trigger;

    (n) deciding that no desired receiving-end module is getting close by the supplying-end module if the start bit signal length does not comply with the set value, getting ready for shutting down the output and proceeding to step (f).

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