Electronic clinical thermometer
First Claim
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1. An electronic clinical thermometer comprising:
- a constant-temperature heater for providing a specified temperature;
a temperature sensor for measuring temperature;
a thermally insulating member having a known thermal conductivity and being disposed as a solid layer between said temperature sensor and said constant-temperature heater;
a controller for controlling said temperature sensor and said constant-temperature heater to make measurements at specified time intervals;
a memory for storing said specified temperature and measured values obtained by said temperature sensor; and
a calculator for calculating estimated temperature at a specified internal body positionby using said specified temperature, said thermal conductivity and the measured values obtained only by said temperature sensor.
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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 constant-temperature heater for providing a specified temperature; a temperature sensor for measuring temperature; a thermally insulating member having a known thermal conductivity and being disposed as a solid layer between said temperature sensor and said constant-temperature heater; a controller for controlling said temperature sensor and said constant-temperature heater to make measurements at specified time intervals; a memory for storing said specified temperature and measured values obtained by said temperature sensor; and a calculator for calculating estimated temperature at a specified internal body position by using said specified temperature, said thermal conductivity and the measured values obtained only by said temperature sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic clinical thermometer comprising:
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a constant-temperature heater for providing a specified temperature; a single temperature sensor for measuring temperature; a thermally insulating member having a known thermal conductivity and being disposed as a solid layer between said temperature sensor and said constant-temperature heater; a controller for controlling said temperature sensor and said constant-temperature heater to make measurements at specified time intervals; a memory for storing said specified temperature and measured values obtained by said temperature sensor; and a calculator for calculating estimated temperature at a specified internal body position by using said specified temperature, said thermal conductivity and said measured values. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification