Emissivity Contrast Sheet for Thermal Camera Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
It is challenging to accurately detect the position of a measurement mark in thermal camera images and maintain temperature differences on camera calibration boards for precise temperature measurement.
Innovation Solution
A sheet for temperature measurement with a temperature measured section having a first emissivity and a marker with a second emissivity, attached to an object, which includes a marker that measures the distance between the thermal camera and the object, allowing for accurate position identification and temperature calculation using a thermal camera, position identifier, distance calculator, and temperature information calculator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measurement mark with known radiation factor is provided on the object surface, then temperature measurement accuracy is improved, but position detection accuracy from thermal camera image deteriorates
Solution Approach 1:
The sheet incorporates a marker section with different emissivity (second emissivity) compared to the temperature measurement section (first emissivity). This local quality difference creates a visible contrast in thermal images, enabling accurate position detection while maintaining temperature measurement accuracy in the first emissivity section.
Solution Approach 2:
The marker section utilizes emissivity difference to create a distinct thermal signature that appears as a different 'color' or intensity region in the thermal image. This allows the marker to be clearly identified and positioned accurately, solving the position detection problem while the temperature measurement section maintains its measurement function.
2Measurement precision
If temperature difference is created on camera calibration board, then temperature measurement accuracy is improved, but long-term temperature difference maintenance becomes difficult
Solution Approach 1:
The invention changes the parameter of emissivity rather than maintaining temperature differences. The marker section has a different emissivity value, which creates a permanent, stable distinction that does not require continuous energy input or temperature control, thus solving the long-term maintenance problem.
Solution Approach 2:
The sheet is designed to be self-contained with the marker and temperature measurement sections working together without external assistance. The emissivity difference is an inherent property that automatically provides the needed distinction and measurement capability without requiring external heating or cooling systems.
3Measurement precision
If measurement mark is provided on object surface, then temperature estimation accuracy is improved, but manual parameter setting complexity increases
Solution Approach 1:
The sheet contains all necessary information within itself - the temperature measurement section with known first emissivity and the marker section with different second emissivity. This self-contained design eliminates the need for manual parameter input, as the system automatically identifies and uses the emissivity values from the sheet's structure.
Solution Approach 2:
The sheet serves multiple functions simultaneously: it provides the measurement mark for temperature estimation, contains the marker for position detection, and embeds the emissivity information needed for calculations. This multi-functionality reduces complexity by consolidating what would otherwise require separate components and manual 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
Enables high-accuracy detection of the sheet's position and temperature measurement without requiring continuous heating, simplifying the measurement process and eliminating the need for manual parameter setting.
Implementation Method 1
a thermal camera that acquires the surface temperature of the object and generates a temperature distribution image
Implementation Method 2
the sheet including a temperature measured section that has a first emissivity, and a marker that is disposed in the temperature measured section, has a second emissivity smaller than the first emissivity
Data Source
AI summary
A sheet for temperature measurement of the present disclosure is attached to an object when a surface temperature of the object is measured by a thermal camera, the sheet including a temperature measured section that has a first emissivity, and a marker that is disposed in the temperature measured section, has a second emissivity smaller than the first emissivity, and measures a distance between the thermal camera and the object.