Oven Wall Shape Measuring Device Using Slit Laser and Optical Filtering
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Solution Overview
Problem
Existing oven wall shape measuring techniques face challenges in obtaining simultaneous laser light and self-emitting light for measuring irregularities without interference, and they have limited measurable and irradiation ranges perpendicular to the oven wall surface.
Innovation Solution
The system employs a slit laser light source, laser light mirrors, and an optical filter to extend the optical path and irradiation range, allowing simultaneous capture of laser and self-emitting light without interference, using a thermally-insulated protection box with a slit-like window and imaging mirrors to image both sides of the oven wall, and an optical filter to separate and adjust light brightness levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single imaging device captures both laser light and self-emitting light simultaneously, then measurement can be performed, but halation occurs and it is difficult to adjust both brightness levels
Solution Approach 1:
The imaging device is divided into two separate imaging devices: one dedicated to capturing laser light for irregularity measurement, and another dedicated to capturing self-emitting light for temperature distribution measurement. This segmentation eliminates the halation problem that occurs when both light sources are captured simultaneously by a single device, allowing each device to be optimized for its specific light source without interference.
Solution Approach 2:
The harmful effect of halation is eliminated by extracting the function of capturing laser light and self-emitting light into separate imaging devices. This removes the conflicting requirement of adjusting both brightness levels simultaneously, as each imaging device independently captures only its designated light source.
2Device complexity
If slit-like laser light is used with shallow irradiation angle, then the technique is simple, but the measurable range perpendicular to the oven wall is limited
Solution Approach 1:
The measurement system is extended from a single shallow-angle irradiation to multiple irradiation angles by arranging multiple laser light sources and imaging devices at different positions. This multi-dimensional approach increases the measurable range perpendicular to the oven wall surface while maintaining the simplicity of the slit-like laser light configuration.
Solution Approach 2:
Multiple laser light sources and imaging devices are combined to work together, with each pair contributing to a different portion of the measurable range. The combined system achieves comprehensive coverage of the oven wall surface while each individual component remains relatively simple in design.
3Device complexity
If spot-like laser light is used to measure one point per brick, then the measurement is simple, but irregularity information for the entire surface cannot be obtained
Solution Approach 1:
The laser light is changed from spot-like (zero-dimensional point) to slit-like (one-dimensional line), enabling measurement across the entire surface of each brick rather than just a single point. This dimensional change allows comprehensive capture of irregularity information while maintaining relatively simple measurement principles.
Solution Approach 2:
The slit-like laser light configuration enables each imaging device to capture irregularity information across the entire visible surface area, making the measurement system universally applicable for comprehensive surface assessment rather than requiring multiple measurements at discrete points.
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 configuration enables a wider measurable range and irradiation area perpendicular to the oven wall, preventing halation and allowing for accurate measurement of oven wall irregularities, thereby prolonging oven life through effective repair strategies.
Implementation Method 1
an optical filter to separate and adjust light brightness levels
Implementation Method 2
laser light mirrors, and an optical filter to extend the optical path and irradiation range
Implementation Method 3
using a thermally-insulated protection box with a slit-like window and imaging mirrors to image both sides of the oven wall
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Laser light and self-emitting light of an oven wall for measuring an irregular shape of an oven wall surface are simultaneously obtained while allowing the laser light and the self-emitting light to not interfere with each other and a measurable range in a direction perpendicular to the oven wall surface and an irradiation range of the laser light to be increased. Included are: a slit laser light source 4 that is arranged in a thermally-insulated protection box 3 having a slit-like window 2 and emits slit-like laser light; a laser light mirror 5 that reflects the laser light and irradiates the oven wall surface with the laser light via the window 2; an imaging mirror 6 that reflects reflected light from the oven wall surface due to irradiation of the laser light and self-emitting light emitted from the oven wall surface, which enter the thermally-insulated protection box 3 via the window 2; and an imaging device 8 that images via an optical filter 7 the self-emitting light and the reflected light that are reflected from the imaging mirror 6.