Angled Calibration Sleeve for Infrared Sensor Precision
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Solution Overview
Problem
Existing calibration sleeves for infrared measuring devices fail to prevent scattered radiation from reaching the sensor, leading to inaccurate calibration due to reflections from the sleeve walls, both internally and externally.
Innovation Solution
The calibration sleeve features angled surface sections on its inner surface, forming a gable-roof-like structure with unequal leg lengths, ensuring that scattered radiation is reflected and absorbed within the sleeve, preventing it from reaching the sensor, and is coated with a porous silicon carbide material for enhanced absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the calibration sleeve has a smooth inner surface, then the manufacturing is simple, but scattered radiation reaches the sensor causing calibration errors
Solution Approach 1:
The inner surface of the calibration sleeve is segmented into multiple angled surface sections instead of being smooth. These sections are arranged to create multiple reflection paths that redirect scattered radiation away from the sensor, thereby improving calibration precision while adding controlled structural complexity.
Solution Approach 2:
The surface sections are positioned specifically in the area where scattered radiation occurs, creating local optical control zones. This targeted approach addresses the scattering problem at critical locations without requiring complete structural redesign of the entire sleeve.
2Measurement precision
If the surface sections are arranged to reflect scattered radiation, then calibration precision improves, but the manufacturing complexity increases
Solution Approach 1:
The surface sections are arranged asymmetrically with specific angles relative to the central longitudinal axis, optimized to reflect scattered radiation away from the sensor. This asymmetric configuration achieves superior radiation control compared to symmetric designs, balancing manufacturing complexity with performance gains.
3Measurement precision
If radiation is reflected multiple times within the sleeve, then scattered radiation is eliminated, but energy loss increases
Solution Approach 1:
The multiple reflections that would normally cause energy loss and scattering are converted into a beneficial mechanism. By carefully designing the reflection angles of the surface sections, scattered radiation is systematically redirected away from the sensor through controlled reflection paths, transforming the harmful scattering effect into a useful radiation management mechanism that improves measurement precision.
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
This design effectively eliminates scattered radiation, ensuring precise calibration by ensuring that only direct radiation from the measuring point reaches the sensor, with the porous coating enhancing absorption and emission properties.
Implementation Method 1
the inner lateral surface of the calibration sleeve formed of a material with a porous surface, in particular by a silicon carbide coating
Implementation Method 2
a porous surface, in particular by a silicon carbide coating
Implementation Method 3
cause the radiation, which is reflected either from the outside into the calibration sleeve or from the area of the measuring point from the bottom of the calibration sleeve, to be reflected by multiple reflections
Implementation Method 4
the calibration sleeve having a base and a plurality of surface sections on its inner lateral surface... the sleeve itself can be heated
Data Source
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AI summary
The invention relates to a calibration sleeve (10) for calibrating an infrared measuring device (50), wherein the calibration sleeve (10) has a plurality of surface sections (21, 22) on its inner shell (13) which are aligned perpendicular to the perpendicular center (16) of the calibration sleeve (10).