Dual-Wavelength Image Reading Device Abnormal Lighting Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image reading devices face challenges in accurately detecting abnormal lighting conditions, particularly when multiple light sources with different wavelength ranges are used, leading to potential errors in image data acquisition and initial adjustments.
Innovation Solution
The implementation of a dual-light-source system, where a first light source and a second light source with different wavelength ranges are used in conjunction with corresponding image sensors, and processing circuitry calculates signal levels to detect and control light amounts, thereby identifying and correcting for abnormal lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single light source is used for image reading, then the device structure is simple, but abnormal lighting cannot be detected
Solution Approach 1:
The single light source is segmented into multiple light sources with different wavelength ranges (first light source and second light source). Each light source is assigned to a dedicated image sensor, enabling independent detection and abnormality identification for each channel, thereby achieving reliable abnormal lighting detection while maintaining manageable system complexity.
2Reliability
If multiple light sources with different wavelength ranges are used, then abnormal lighting can be detected, but the device structure becomes complex
Solution Approach 1:
The multiple light sources and image sensors are designed to serve dual purposes: normal image reading function and abnormal lighting detection function. The same optical components are utilized for both standard operation and diagnostic purposes, reducing the need for separate dedicated components and thereby limiting the increase in device complexity.
Solution Approach 2:
The system implements feedback mechanisms where image sensors continuously monitor the output of each light source. The processing circuitry analyzes the feedback signals from sensors to detect abnormalities in real-time, enabling dynamic adjustment and reliable detection without requiring overly complex static structural designs.
3Measurement precision
If light amounts are not controlled, then the system is simple to operate, but image quality and detection accuracy deteriorate
Solution Approach 1:
The system implements self-service light amount control where the processing circuitry automatically adjusts the intensity of each light source based on real-time feedback from the corresponding image sensor. This autonomous control mechanism ensures optimal signal level accuracy without requiring manual intervention, thereby maintaining ease of operation while achieving high 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 approach effectively reduces the occurrence of abnormal images and ensures accurate initial adjustments by reliably detecting and addressing abnormal lighting issues in both visible and invisible light sources, enhancing the overall image reading process.
Implementation Method 1
The first image sensor receives light emitted from the first light source to and reflected by the object
Implementation Method 2
The first image sensor receives light emitted from the first light source to and reflected by the object and output a first image
Implementation Method 3
The second image sensor receives light emitted from the second light source to and reflected by the object
Implementation Method 4
The second image sensor receives light emitted from the second light source to and reflected by the object and output a second image
Data Source
AI summary
An image reading device includes a first light source, a first image sensor, a second light source, a second image sensor, and processing circuitry. The first light source irradiates an object with light in a first wavelength range. The first image sensor receives light reflected by the object and output a first image. The second light source irradiates the object with light in a second wavelength range different from the first wavelength range of the first light source. The second image sensor receives light reflected by the object and output a second image. The processing circuitry calculates signal levels of the first and second image, controls light amounts of the first and second light source respectively based on the calculated signal levels, and detects abnormal lighting of the first or second light source corresponding to the first or second image sensor.