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SYSTEMS AND METHODS FOR SENSOR CALIBRATION IN PHOTOPLETHYSMOGRAPHY

  • US 20160354017A1
  • Filed: 08/19/2016
  • Published: 12/08/2016
  • Est. Priority Date: 03/15/2013
  • Status: Abandoned Application
First Claim
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1. A wireless photoplethysmography system, comprising:

  • a wireless photoplethysmography sensor, comprising;

    a sensor body, comprising;

    an emitter configured to emit light;

    a detector configured to receive the light emitted by the emitter and to generate a signal based on the light received from the emitter;

    a memory storing a plurality of calibration coefficients or calibration curves corresponding to respective wavelengths of light that may be emitted by the emitter;

    a calibration circuit coupled to an electrical input of the emitter to measure a first voltage present at the electrical input and coupled to an electrical output of the emitter to measure a second voltage present at the electrical output;

    a processor configured to determine a voltage difference between the first voltage and the second voltage when a current is passed through the emitter, and to select an appropriate calibration coefficient or calibration curve for the wireless photoplethysmography sensor from the plurality of calibration coefficients or calibration curves stored on the memory based on the voltage difference; and

    a wireless transmitter configured to wirelessly transmit the signal and the appropriate calibration coefficient or calibration curve to a monitor, wherein the appropriate calibration coefficient or calibration curve enables the monitor to calculate a physiological parameter based on the signal.

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