Adaptive Wavelength Light Source for Inspection Image Consistency
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Solution Overview
Problem
Existing physical body inspection systems struggle to consistently acquire proper images due to the varying influence of environment light, such as solar light and indoor illumination, which changes throughout the day.
Innovation Solution
A physical body inspection system that includes a light source device, an image pickup device, and a display, where the light source device applies light in a predetermined wavelength band that is low in intensity and matches the environment light at the time of inspection, and a processor identifies and controls this wavelength band to reduce the influence of environment light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a specific wavelength region with low solar light spectral irradiance is used, then the influence of solar light is reduced, but the image cannot be properly acquired when illumination and solar light are mixed indoors and light source state changes by time of day
Solution Approach 1:
The patent applies dynamics by making the light source device adjustable in wavelength band selection. The system dynamically adapts the illumination wavelength band to match the environment light characteristics at different times of day, transitioning from a fixed wavelength approach to a flexible, adaptive one. This allows the system to maintain reliable image acquisition despite changing light conditions by actively adjusting the light source properties.
Solution Approach 2:
The patent implements parameter changes by varying the wavelength band of the light source device based on the spectral characteristics of environment light at different times. Instead of using a fixed wavelength region, the system changes the illumination parameters (wavelength band) to complement the ambient light conditions, thereby maintaining consistent image quality across different temporal and environmental conditions.
2Adaptability or versatility
If environment light is used for inspection, then the inspection can be performed at any time of day, but the pixel values vary when illumination and sunlight are changed causing visual recognition problems
Solution Approach 1:
The patent applies feedback by using the image pickup device to detect the actual illumination conditions and then adjusting the light source device accordingly. The system continuously monitors the light environment and adjusts the wavelength band of the light source to compensate for variations in environment light, ensuring consistent pixel values and reliable visual recognition regardless of external lighting conditions.
Solution Approach 2:
The patent employs a composite lighting approach by combining the light source device with environment light. Instead of relying solely on natural light or a fixed artificial source, the system creates a composite illumination field that integrates controlled artificial light in specific wavelength bands with ambient environment light, thereby maintaining measurement precision while enabling inspection at any time of day.
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 system efficiently reduces the influence of environment light, allowing for consistent and accurate image acquisition of physical bodies during inspections in factories or similar environments.
Implementation Method 1
a light source device (14), the light source device being configured to apply light in a predetermined wavelength band to a physical body
Implementation Method 2
an image pickup device (13), the image pickup device being configured to pick up an image of the physical body
Data Source
AI summary
A physical body inspection system includes a light source device, an image pickup device and a display. The light source device is configured to apply light in a predetermined wavelength band to a physical body, the physical body being an inspection object, the predetermined wavelength band being a wavelength band in wavelength bands constituting environment light at an inspection time-of-day, and the light in the predetermined wavelength band being low in intensity. The inspection time-of-day is a time of day when the physical body is inspected. The image pickup device is configured to pick up an image of the physical body. The display is configured to display the picked-up image of the physical body.