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1. WO2020109119 - SYSTÈME DE CAPTEUR DE TEMPÉRATURE CORPORELLE CENTRALE BASÉ SUR UNE MESURE DE FLUX

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[ EN ]

CLAIMS:

1. A core body temperature sensor system comprising:

a first set (34) of at least three temperature sensors for placement against the skin of a subject for whom the core body temperature is to be measured;

a first insulating layer (30) over the first set of temperature sensors;

a second set (36) of at least three temperature sensors, each temperature sensor of the second set being positioned directly over an associated temperature sensor of the first set to form a temperature sensor pair, spaced by an associated portion of the first insulating layer;

a processor (44) for processing the signals from the temperature sensors to derive a core body temperature,

wherein the processor is adapted to:

monitor the sensed temperatures at the temperature sensors;

monitor a temporal rate of change of sensed temperature at one or more of the temperature sensors;

determine the core body temperature based on a first representative temperature for the first set of temperature sensors, a second representative temperature for the second set of temperature sensors and temporal rate of change information in respect of the first and second representative temperatures.

2. A system as claimed in claim 1, wherein the processor is adapted to determine a quality parameter for the core body temperature determination and generate a message (NR) in response to quality below a threshold.

3. A system as claimed in claim 1 or 2, wherein the processor (44) is adapted to determine that the system is not correctly applied to a subject and generate an output alarm.

4. A system as claimed in claim 3, wherein the processor is adapted to determine that the system is not correctly applied if a difference in sensed temperatures between the temperature sensors of the first set exceeds a threshold.

5. A system as claimed in any one of claims 1 to 4, wherein the first

representative temperature is a mean or maximum sensed temperature for the first set.

6. A system as claimed in claim 5, wherein the second representative temperature is a mean or maximum sensed temperature for the second set, or the temperature sensed by the temperature sensor paired with a sensor of the first set which provided the first representative temperature.

7. A system as claimed in any one of claims 1 to 6 comprising exactly three sensor pairs arranged in locations which form an isosceles triangle.

8. A system as claimed in any one of claims 1 to 7 wherein the first insulating layer (30) extends laterally all around the location of each sensor and between each sensor.

9. A system as claimed in claim 8, wherein the first insulating layer has shape of a central hub at which one sensor is located, a set of spokes for the other sensors and a spoke for an electrical interconnection.

10. A system as claimed in any one of claims 1 to 9, comprising a second insulating layer (38) over the first insulating layer.

11. A system as claimed in claim 10, wherein the second insulating layer has the same shape as the first insulating layer.

12. A system as claimed in any one of claims 1 to 11, wherein the core body temperature is determined as:


wherein Tb is the first representative temperature, Tt is the second representative temperature, Tc is the core temperature and b and g are calibration constants.

13. A core body temperature measuring method comprising:

(110) obtaining temperature measurements from a first set of at least three temperature sensors placed against the skin of a subject;

(112) obtaining temperature measurement from a second set of at least three temperature sensors, each temperature sensor of the second set being positioned directly over an associated temperature sensor of the first set to form a temperature sensor pair, spaced by an associated portion of an insulating layer; and

(114) processing the signals from the temperature sensors to derive a core body temperature by:

monitoring the sensed temperatures at the temperature sensors; monitoring a temporal rate of change of sensed temperature at one or more of the temperature sensors; and

determining the core body temperature based on a first representative temperature for the first set of temperature sensors, a second representative temperature for the second set of temperature sensors and temporal rate of change information in respect of the first and second representative temperatures.

14. A method as claimed in claim 13, comprising determining a quality parameter for the core body temperature determination and generating a message (NR) in response to quality below a threshold.

15. A method as claimed in claim 13 or 14, comprising (116) determining that the system is not correctly applied to a subject and generating an output alarm, for example if a difference in sensed temperatures between the temperature sensors of the first set exceeds a threshold.