Wearable Temperature Sensor with Capacitance Contact Compensation
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Solution Overview
Problem
Current contact-type temperature measurement methods for body temperature measurement lack accuracy, leading to poor user experience due to unstable contact states between temperature sensors and the biological body.
Innovation Solution
A wearable device equipped with a first sensing member that forms equivalent capacitance with the epidermis to determine contact state and a second sensing member to measure temperature, with a processor that adjusts temperature readings based on contact state, using temperature compensation values correlated with capacitance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If contact-type temperature measurement is used, then temperature measurement can be obtained, but measurement accuracy deteriorates due to unstable contact state
Solution Approach 1:
The patent uses capacitance sensing to detect contact state between the wearable device and skin, then feeds this information back to adjust temperature measurement. The processor determines contact state based on capacitance changes and compensates temperature readings accordingly, creating a closed-loop system that improves measurement reliability under varying contact conditions
Solution Approach 2:
The patent introduces capacitance sensing as an intermediary mechanism to indirectly assess contact state. Rather than directly measuring contact stability, the system uses capacitance changes between the sensing member and skin as a mediator to infer contact quality, which then informs temperature measurement compensation
2Measurement precision
If temperature compensation is applied based on contact state, then temperature measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent makes the sensing member multi-functional by using it for both capacitance sensing (to detect contact state) and temperature sensing. This universal approach allows the system to perform multiple functions with a single component, reducing overall device complexity while still enabling temperature compensation
Solution Approach 2:
The patent combines capacitance sensing and temperature sensing capabilities into an integrated sensing system. By merging these functions and sharing processing logic in the processor, the system achieves temperature compensation without proportionally increasing device complexity
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
The wearable device enhances temperature measurement accuracy by correcting for contact state variations, providing reliable and precise body temperature data.
Implementation Method 1
The first sensing member is configured to obtain capacitance... forms equivalent capacitance with epidermis of the biological body
Implementation Method 2
the first sensing member receives heat of the biological body
Data Source
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AI summary
This application relates to the field of temperature measurement technologies, and provides a wearable device and a temperature measurement method. The wearable device includes a first sensing member, a second sensing member, and a processor. When the wearable device is close to a biological body, the first sensing member forms equivalent capacitance with the biological body, and the first sensing member receives heat of the biological body. The second sensing member is configured to measure temperature of the first sensing member as an initial temperature. The processor is electrically connected to the first sensing member, and configured to read a capacitance value of the equivalent capacitance and determine a contact state between the first sensing member and the biological body according to the capacitance value. The processor is further electrically connected to the second sensing member, and configured to determine whether to match a corresponding temperature compensation value to the initial temperature according to the contact state. The wearable device provided in this application can monitor temperature of a biological body for a long time, and provide relatively accurate temperature data.