×

Electronic thermometer and temperature prediction method therefor

  • US 6,439,768 B1
  • Filed: 12/27/1999
  • Issued: 08/27/2002
  • Est. Priority Date: 11/30/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. An electronic thermometer for determining the temperature of a human body, comprising:

  • a symmetrically shaped probe having a symmetrical point;

    a sensor provided in the symmetrical point in the probe for sensing temperatures of the human body and outputting the sensed temperatures; and

    a processor for sampling the sensed temperatures at a plurality of times, performing a first temperature calculation to obtain an initial prediction of temperature, and applying a selected compensation coefficient in a first first-order differential equation (A) to calculate a compensated temperature, and using the calculated compensated temperature in a second first-order differential equation (B) to calculate a final prediction of temperature, wherein;

    the compensation coefficient is selected from a plurality of different compensation coefficients, based on a rate of change of the sensed temperatures, different parts of the human body having different compensation coefficients associated therewith; and

    the first first-order differential equation (A) comprises a first derivative of each of the sampled sensed temperatures; and

    the second first-order differential equation (B) comprises a first derivative of the compensated temperature;

    whereby the electronic thermometer calculates a second order prediction of the temperature of the human body based on the compensated temperature before the sensor has reached the temperature of the human body.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×