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US 11,141,069 B2Granted
Method for increasing accuracy of measurement of body temperature
AssigneeHetaida Technology Co., Ltd.
InventorZhenguang Chen
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AssigneeHetaida Technology Co., Ltd.
InventorZhenguang Chen
Estimating the term…
A method for increasing accuracy of measurement of body temperature includes a step of collecting an infrared signal to obtain an infrared signal value (step 1), a step of collecting a skin image to obtain a calibrating emissivity (step 2), a step of obtaining a calibrated infrared signal value according to the calibrating emissivity and the infrared signal value obtained in step 1 (step 3), and a step of making a conversion into an actual body temperature (step 4). Accordingly, an actual temperature value of the skin surface can be attained to increase the accuracy of measurement effectively, thereby allowing the measured result to be more close to the real body temperature of a tested target.
A method for increasing accuracy of measurement of body temperature, comprising:
Dependencies are inferred from the claim text.
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Measuring for diagnostic purposes ; Identification of persons: measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for…
For sensing the radiation of moving bodies: living bodies
Using light, e.g. diagnosis by transillumination, diascopy, fluorescence: by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy,…
Using light, e.g. diagnosis by transillumination, diascopy, fluorescence: devices for viewing the surface of the body, e.g. camera, magnifying lens
About 13 years 2 months of term left · ends 27 Dec 2039 (estimated)
The present invention relates to measurement of body temperature, and more particularly to a method for increasing accuracy of measurement of body temperature.
Generally, conventional infrared thermometers are adapted to people having various colors of skin. In fact, a black body is an idealized radiator capable of absorbing radiant energy of all wavelengths, and there is no reflected energy and no energy transmitted through the black body. The emissivity of the surface of the black body is 1. Almost all the objects in the natural world do not belong to the black body, and neither do human bodies. People in the world have different colors of skin, such as black, red, yellow and white, and the values of the emissivity for different colors of skin surface are different. It is common that the values of emissivity of human skin range from 0 to 1. Thus, when users having different skin colors are subjected to measurement of body temperature by conventional infrared thermometers, the inaccuracy of measurement is easily incurred.
Thereafter, some studies were invented to recognize the state of the skin according to information about images of a target site, such as the skin color. According to the obtained information, the original temperature tested by an infrared temperature sensor could be modified. This measurement takes account of different skin sites and skin states to a certain extent, but the accuracy of this measurement is still limited.
FIG. 1 is a flow chart of a method of one embodiment of the present invention.
FIG. 1 illustrates a flow chart of a preferred embodiment of the present invention.
As shown, a method for increasing accuracy of measurement of body temperature of the present invention includes following steps.
Step 1 is a step of collecting an infrared signal. In this step, an infrared signal emitted by skin at a target site is received by using an infrared temperature-measuring unit which is set at a predetermined baseline emissivity, thereby obtaining an infrared signal value. Preferably, the baseline emissivity can be an arbitrary value which is greater than 0 and smaller than or equal to 1.