Heat Flow Measurement Apparatus Surface Sensor Arrangement
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Solution Overview
Problem
Conventional heat flow measurement apparatuses face challenges in accurately detecting heat produced inside an object due to temperature drift issues caused by external temperature changes, especially when heat flux sensors and thermocouples are either laminated in the thickness direction or arranged apart, leading to inaccurate signal correspondence and increased thickness, which can disturb air flow and hinder precise measurement.
Innovation Solution
A heat flow measurement apparatus integrating a heat flux sensor and a thermocouple sheet, where the thermocouple is fixed to extend from the insulation substrate in the surface direction, allowing both sensors to be positioned closely and reducing thickness, thus minimizing temperature drift and air flow disturbance, enabling accurate detection of heat flow by correlating signals from both sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the heat flux sensor and thermocouple are stuck in a thickness direction, then both sensors can be integrated into a single measurement apparatus, but the thickness of the apparatus becomes large causing air flow turbulence that disturbs measurement accuracy
Solution Approach 1:
The patent transitions from stacking sensors in the thickness direction (Z-axis) to arranging them in the surface direction (X-Y plane). The heat flux sensor and thermocouple are positioned adjacent to each other on the same surface, with the thermocouple extending from the insulation substrate in the surface direction rather than through the thickness. This dimensional change reduces the apparatus thickness while maintaining sensor integration.
2Length of stationary object
If the heat flux sensor and thermocouple are arranged apart from each other in a surface direction, then the apparatus thickness can be reduced, but the signals from both sensors reflect different locations making it difficult to reduce temperature drift influence
Solution Approach 1:
The patent positions the thermocouple and heat flux sensor at specific local locations on the insulation substrate such that they detect thermal conditions at substantially the same position. The thermocouple is arranged to extend from the insulation substrate in the surface direction, ensuring its sensing junction is located at the same position as the heat flux sensor's measurement surface. This localized arrangement ensures both sensors measure the same thermal environment, enabling accurate temperature drift correction.
3Device complexity
If a thick apparatus is attached to the object surface, then sensor integration is achieved, but air flow turbulence occurs that prevents accurate signal correspondence with thermal flow
Solution Approach 1:
By changing the arrangement from thickness-direction stacking to surface-direction placement, the patent reduces the protrusion height of the measurement apparatus. The thermocouple extends from the insulation substrate in the surface direction rather than through the thickness, minimizing the vertical profile. This reduced profile prevents air flow turbulence while maintaining the integrated sensor configuration.
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 apparatus achieves accurate measurement of heat flow by reducing temperature drift and air flow disturbance, ensuring that the heat flux sensor and thermocouple signals correspond accurately, allowing for precise detection of heat produced inside the object without thickness-related measurement inaccuracies.
Implementation Method 1
a heat flux sensor... detecting a heat flux flowing between one surface and the other surface in a thickness direction
Implementation Method 2
a thermocouple... detecting temperature changes on the surface of the object due to a change in the outside temperature
Data Source
AI summary
A heat flow measurement apparatus is provided with a heat flux sensor and a thermocouple sheet. The heat flux sensor includes an insulation substrate, a plurality of interlayer connection members, a front surface wiring pattern, a back surface wiring pattern, a front surface protective member and a back surface protective member. The thermocouple sheet includes a thermocouple, a first insulation sheet and a second insulation sheet, and is fixed to a portion where the front surface protective member and the back surface protective member extend in a surface direction from the insulation substrate.