Temporal artery temperature detector
DC CAFCFirst Claim
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1. A method of detecting human body temperature comprising:
- laterally scanning a temperature detector across a forehead; and
providing a peak temperature reading from plural readings during the step of scanning.
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Abstract
Body temperature measurements are obtained by scanning a thermal radiation sensor across the side of the forehead over the temporal artery. A peak temperature measurement is processed to compute an internal temperature of the body as a function of ambient temperature and the sensed surface temperature. The function includes a weighted difference of surface temperature and ambient temperature, the weighting being varied with target temperature through a minimum in the range of 96° F. and 100° F. The radiation sensor views the target surface through an emissivity compensating cup which is spaced from the skin by a circular lip of low thermal conductivity.
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Citations
37 Claims
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1. A method of detecting human body temperature comprising:
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laterally scanning a temperature detector across a forehead; and
providing a peak temperature reading from plural readings during the step of scanning. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of detecting human body temperature comprising:
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detecting temperature at a forehead through a lateral scan across the temporal artery; and
computing an internal body temperature of the body as a function of ambient temperature and sensed surface temperature. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A method of detecting human body temperature comprising:
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laterally scanning a temperature detector across an artery; and
providing a peak temperature reading from plural readings during the step of scanning. - View Dependent Claims (23, 24, 25, 26)
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- 27. A method of detecting human body temperature comprising measuring temperature of the temporal artery through skin.
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32. A method of detecting human body temperature comprising:
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detecting temperature at a forehead; and
computing an internal body temperature of the body as a function of ambient temperature and sensed surface temperature, the function including a weighted difference of surface temperature and ambient temperature, the weighting including an approximation of h/pc at a forehead artery where h is a heat transfer coefficient between the target surface and ambient, p is perfusion rate and c is blood specific heat.
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33. A body temperature detector system comprising:
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a temperature detector; and
electronic circuitry which measures peak temperature from at least three readings per second during scan of the temperature detector across an artery and which processes the measured peak temperature to provide a temperature display based on a model of heat balance relative to a detected arterial temperature, the electronic circuitry computing an internal temperature of the body as a function of ambient temperature and sensed surface temperature, the function including a weighted difference of surface temperature and ambient temperature, the weighting including an approximation of h/pc at a forehead artery where h is a heat transfer coefficient between the target surface and ambient, p is perfusion rate and c is blood specific heat. - View Dependent Claims (34)
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35. A body temperature detector system comprising:
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a temperature detector; and
electronic circuitry which measures peak temperature from at least three readings per second during scan of the temperature detector across an artery and which processes the measured peak temperature to provide a temperature display based on a model of heat balance relative to a detected arterial temperature, the electronic circuitry computing an internal temperature of the body as a function of ambient temperature and sensed surface temperature, the function including a weighted difference of surface temperature and ambient temperature, the weighting being a linear approximation having a minimum between 96°
F. and 97°
F.
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36. A body temperature detector system comprising:
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a temperature detector; and
electronic circuitry which measures peak temperature from at least three readings per second during scan of the temperature detector across an artery and which processes the measured peak temperature to provide a temperature display based on a model of heat balance relative to a detected arterial temperature, the electronic circuitry computing an internal temperature of the body as a function of ambient temperature and sensed surface temperature, the function including a weighted difference of surface temperature and ambient temperature, the weighting including a polynomial approximation of 1+h/pc=k1Ts2−
k2Ts+k3 where h is a heat transfer coefficient between the target surface and ambient, p is perfusion rate, c is blood specific heat, k1 is approximately 0.00359, k2 is approximately 0.708 and k3 is approximately 36.1.
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37. A body temperature detection system comprising:
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a temperature sensor which senses temperature of a skin surface; and
electronic circuitry which computes an internal temperature of the body as a function of ambient temperature and sensed surface temperature, the function including a weighted difference of surface temperature and ambient temperature, the weighting being varied with target temperature through a minimum in the range of 96°
F.-100°
F., the weighting increasing above and below the minimum, the weighting including an approximation of h/pc at a forehead artery where h is a heat transfer coefficient between the target surface and ambient, p is perfusion rate and c is blood specific heat, the approximation of h/pc at the minimum being about 0.19.
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Specification