Electronic clinical thermometer
First Claim
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1. An electronic clinical thermometer comprising:
- a first temperature sensor and a second temperature sensor each for measuring temperature;
a first thermally insulating member disposed between said first temperature sensor and a target body to be measured;
a second thermally insulating member disposed between said second temperature sensor and said target body, said first and second thermally insulating members having different thermal conductivity values;
a controller for controlling said first and second temperature sensors to make measurements at specified time intervals;
a memory for storing first measured values obtained by said first temperature sensor and second measured values obtained by said second temperature sensor; and
a calculator for calculating estimated temperature at a specified internal body position from said first and second measured values.
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Abstract
An electronic clinical thermometer has a probe including a temperature sensor and a heat flux sensor which are controlled to make measurements at specified time intervals. The measured values are used in solving the equation of heat conduction to estimate the temperature of an internal body position. A heater may be included to preheat a body part in order to reduce the time required for measurement. The probe may use two temperature sensors to measure temperatures at two body surface positions through insulating members which are different in thermal conductivity.
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Citations
16 Claims
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1. An electronic clinical thermometer comprising:
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a first temperature sensor and a second temperature sensor each for measuring temperature; a first thermally insulating member disposed between said first temperature sensor and a target body to be measured; a second thermally insulating member disposed between said second temperature sensor and said target body, said first and second thermally insulating members having different thermal conductivity values; a controller for controlling said first and second temperature sensors to make measurements at specified time intervals; a memory for storing first measured values obtained by said first temperature sensor and second measured values obtained by said second temperature sensor; and a calculator for calculating estimated temperature at a specified internal body position from said first and second measured values. - View Dependent Claims (2, 3, 4)
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5. An electronic clinical thermometer comprising:
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a first temperature sensor and a second temperature sensor each for measuring temperature; a first thermally insulating member disposed between said first temperature sensor and a target body to be measured; a second thermally insulating member disposed between said second temperature sensor and said target body, said first and second thermally insulating members having different thermal conductivity values; a controller for controlling said first and second temperature sensors to make measurements at specified time intervals; a memory for storing first measured values obtained by said first temperature sensor and second measured values obtained by said second temperature sensor; and a calculator for calculating estimated temperature at a specified internal body position from said first and second measured values, said calculator obtaining said estimated temperature by calculating time rate of change in measured values by said first temperature sensor. - View Dependent Claims (6, 7, 8)
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9. An electronic clinical thermometer comprising:
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a cover material that contacts a target body to be measured; a first temperature sensor and a second temperature sensor each for measuring temperature; a first thermally insulating member disposed between said first temperature sensor and said cover material and directly contacting said cover material; a second thermally insulating member disposed between said second temperature sensor and said cover material and directly contacting said cover material, said first and second thermally insulating members having different thermal conductivity values; a controller for controlling said first and second temperature sensors to make measurements at specified time intervals; a memory for storing first measured values obtained by said first temperature sensor and second measured values obtained by said second temperature sensor; and a calculator for calculating estimated temperature at a specified internal body position from said first and second measured values. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification