Wearable Temperature Sensor Using Reference Heat Resistance for Accurate Readings
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Solution Overview
Problem
Portable temperature measurement devices, such as those worn on the wrist, face challenges in accurately measuring external air temperature due to the influence of body temperature through the device case, and existing solutions fail to simultaneously measure deep body and external air temperatures with precision.
Innovation Solution
A temperature measurement device with multiple thermal measurement parts and heat resistance/transfer coefficient configurations allows for the computation of deep body and external air temperatures using a single device, featuring separate surface and reference temperature measurement parts, heat insulating and releasing control parts, and a display device for wireless data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the temperature sensor is provided in the case or external peripheral part of the case, then the device structure is simple, but the temperature sensor is affected by body temperature through the case, leading to inaccurate external air temperature measurement
Solution Approach 1:
The device divides temperature measurement into multiple independent parts: surface temperature measurement part, first reference temperature measurement part, and second reference temperature measurement part. Each part measures temperature at different positions with different heat resistance characteristics, allowing separate measurement of body surface temperature and external air temperature without mutual interference.
Solution Approach 2:
The patent introduces reference temperature measurement parts as intermediary elements between the surface temperature measurement part and the external environment. These reference parts have predetermined heat resistance values and measure temperatures at intermediate positions, enabling computational separation of body temperature influence from external air temperature measurement.
2Measurement precision
If the heat-sensitive part protrudes from the case with a predetermined gap, then body temperature effect is reduced, but the device structure becomes more complex and measurement of deep body temperature simultaneously is not achieved
Solution Approach 1:
The temperature measurement device achieves multi-functionality by simultaneously measuring both external air temperature and deep body temperature using the same sensor system. The surface temperature measurement part contacts the body to measure surface temperature, while reference temperature measurement parts with different heat resistance values enable computation of both external air temperature and deep body temperature, eliminating the need for separate measurement systems.
3Measurement precision
If temperature correction process is carried out when the device is being worn, then body temperature effect is partially compensated, but accurate simultaneous measurement of deep body temperature and external air temperature is not achieved
Solution Approach 1:
The patent utilizes parameter changes in heat resistance values to achieve different measurement objectives. The first reference temperature measurement part has a first predetermined heat resistance value, while the second reference temperature measurement part has a second predetermined heat resistance value different from the first. By measuring temperatures at these different heat resistance parameters and using computational processing, the system simultaneously determines both external air temperature and deep body temperature from the same sensor readings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate measurement of deep body and external air temperatures, reducing the load on the subject and improving portability and usability by using a simple structure with separate components and wireless communication.
Implementation Method 1
a first surface temperature measurement part subjected to measure, as a first surface temperature, a surface temperature of a subject to be measured; a first reference temperature measurement part subjected to measure, as a first reference temperature, the temperature at a position having a predetermined heat resistance value relative to the measurement position of the first surface temperature
Implementation Method 2
a first external air temperature measurement part subjected to measure, as a first external air temperature, the temperature at a position having a first heat resistance value relative to the measurement position of the first reference temperature and having a predetermined heat transfer coefficient relative to external air
Data Source
AI summary
A temperature measurement device includes a first surface temperature measurement part performing a measurement to be used as a first surface temperature; a first reference temperature measurement part performing a measurement to be used as a first reference temperature; a first external air temperature measurement part performing a measurement to be used as a first external air temperature; a second surface temperature measurement part performing a measurement to be used as a second surface temperature; a second reference temperature measurement part performing a measurement to be used as a second reference temperature; a second external air temperature measurement part performing a measurement to be used as a second external air temperature; a deep-part temperature computation part computing the deep-part temperature of a subject to be measured; and an external air temperature computation part computing the external air temperature of the external air.