Flat Plate Thermal Resistor with Variable Conductive Dispersion
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Solution Overview
Problem
Existing non-heating-type core body thermometers with complex shapes and high manufacturing costs due to varying thermal resistor thicknesses, which complicates the homogenizing member and increases production expenses without compromising measurement accuracy.
Innovation Solution
A core body thermometer with a flat plate-shaped thermal resistor having two regions with different thermal resistances, achieved by varying the occupancy and dispersion of a conductive member, allowing for uniform thickness and simplified shape without altering measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the thicknesses of the heat insulating materials on which the pairs of temperature sensors are disposed are made different, then the thermal resistance values are made different, but the shape of the homogenizing member becomes stepped and complicated, which causes increase in manufacturing cost
Solution Approach 1:
The patent applies local quality by creating different thermal resistance values through the occupancy and dispersion of conductive members within the thermal resistor, rather than changing the overall thickness. This allows specific regions to have different thermal properties while maintaining a uniform overall structure, thereby resolving the contradiction between measurement precision and manufacturing ease.
Solution Approach 2:
The patent changes the thermal resistance parameter by varying the occupancy and dispersion of conductive members rather than changing the thickness parameter. This parameter substitution allows different thermal resistance values to be achieved while maintaining a uniform thickness, thus avoiding the need for stepped homogenizing member shapes and reducing manufacturing costs.
2Measurement precision
If the thickness of the thermal resistor is changed to create different thermal resistance values, then the thermal resistance values are made different, but the shape becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent implements local quality by introducing conductive members with varying occupancy and dispersion patterns in specific regions of the thermal resistor. This creates spatially varying thermal resistance without requiring changes in overall thickness, thereby maintaining a simple uniform shape while achieving the desired thermal resistance differentiation.
Solution Approach 2:
The patent substitutes the thickness parameter with occupancy and dispersion parameters of conductive members to achieve different thermal resistance values. This parameter change allows thermal resistance differentiation while maintaining a uniform thickness and simple shape, thus reducing 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
Reduces manufacturing costs by simplifying the shape of the thermal resistor while maintaining accurate core body temperature measurement through adjusted thermal resistance values without changing the thickness, thereby enhancing cost-effectiveness.
Implementation Method 1
a flat plate-shaped thermal resistor having a first region and a second region having different thermal resistances... the first region and the second region are adjusted to have the different thermal resistances by varying occupancy and/or dispersion of a conductive member(s)
Data Source
AI summary
A core body thermometer is provided that includes a plate-shaped wiring substrate having a first region and a second region having different thermal resistances, a first temperature sensor and a second temperature sensor located in a first region and across a thickness direction of the first region and a third temperature sensor and a fourth temperature sensor located in a second region and across a thickness direction of the second region. Moreover, a processing circuit is provided that processes output signals of the first, second, third and fourth temperature sensors. The first and second regions are adjusted to have the different thermal resistances by varying occupancy and/or dispersion of the conductive patterns.