| 主权项 |
1. An apparatus to estimate a body core temperature from an external source point, the apparatus comprising:
a housing; a digital infrared sensor operably mounted to the housing, the digital infrared sensor being operable to receive electromagnetic energy from the external source point of a subject and operable to generate a numerical representation of the electromagnetic energy of the external source point; a solid-state image transducer operably mounted to the housing and operable to generate at least two images; an ambient air temperature sensor operably mounted to the housing and operable to generate a representation of an ambient air temperature reading; a microprocessor mounted in the housing, electrically coupled to digital infrared sensor and the solid-state image transducer and including a temporal-variation-amplifier of at least two images that is operable to generate a temporal variation from the at least two images, a vital-sign generator that is operably coupled to the temporal-variation-amplifier that is operable to generate at least one vital sign from the temporal variation and the microprocessor being operable to estimate the body core temperature of the subject from the numerical representation of the electromagnetic energy of the external source point, wherein estimating the body core temperature of the subject further comprises:
calculating the body core temperature from the numerical representation of the electromagnetic energy of the external source point of the subject, a representation of the ambient air temperature reading, a representation of a calibration difference, and a representation of a bias in consideration of the temperature sensing mode,wherein calculating the body core temperature is based on a cubic relationship representing three thermal ranges between the numerical representation of the electromagnetic energy of the external source point and the body core temperature, wherein the cubic relationship includes a coefficient representative of different relationships between the external source point and the body core temperature in the three thermal ranges,wherein the cubic relationship is TB=ATSkin3+BTSkin2+CTSkin+D−E(TAmbient−75), TAmbient<T1 or TAmbient>T2 and TB=ATSkin3+BTSkin2+CTSkin+D, T1<TAmbient<T2 where TB is the body core temperature, TSkin is the numerical representation of the electromagnetic energy of the external source point, A is 0.0002299688, B is −0.0464237524, C is 3.05944877, D is 31.36205 and E is 0.135, where Tambient is the ambient temperature, where T1 and T2 are boundaries between the three thermal ranges and T1 and T2 are selected from a group of pairs of ambient temperatures consisting of 67° F. and 82° F.; 87° F. and 95° F.; and 86° F. and 101° F.; a button operably coupled to the microprocessor; and a display device operably coupled to the microprocessor that is operable to display the body core temperature. |
