Appearance Inspection System Luminance Monitoring
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Solution Overview
Problem
Existing appearance inspection systems for connecting rods may fail to detect defects like scratches due to low luminance issues, leading to incorrect classification of products as acceptable, which compromises the reliability of inspection results.
Innovation Solution
Incorporating a light receiving device or a grayscale chart on the inspection system to measure luminance and determine if it meets a preset reference value, ensuring that defects are accurately identified and products are classified correctly based on reliable inspection conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light receiving device or grayscale chart is added to measure luminance, then the reliability of inspection results is improved, but the device complexity increases
Solution Approach 1:
The retaining tool serves dual purposes: it holds the object to be inspected while simultaneously providing a mounting surface for the light receiving device or grayscale chart. This self-service approach allows the retaining tool to contribute to both object handling and luminance measurement functions, avoiding the need for separate dedicated measurement apparatus and thereby reducing overall system complexity while improving inspection reliability
Solution Approach 2:
The patent combines the luminance measurement function with the existing retaining tool structure by mounting the light receiving device or grayscale chart directly on it. This merging of functions allows the system to acquire luminance data without adding independent measurement equipment, thus improving reliability while minimizing increases in device complexity
2Reliability
If luminance measurement is implemented to detect inspection condition violations, then product quality assurance is improved, but the ease of operation deteriorates due to additional measurement steps
Solution Approach 1:
The light receiving device or grayscale chart is pre-mounted on the retaining tool before the inspection process begins. This preliminary setup ensures that luminance measurement capability is already in place when inspection starts, eliminating the need for additional setup steps during operation and maintaining ease of operation while enabling improved product quality assurance through reliable luminance measurement
3Device complexity
If the light receiving device is mounted on the retaining device, then the inspection system configuration is simplified, but the measurement precision may be affected by the retaining device structure
Solution Approach 1:
The light receiving device or grayscale chart is mounted on a specific local area of the retaining tool that is strategically positioned to receive light reflected from the object's surface. This localized mounting approach ensures that the measurement location on the retaining tool has optimal light reception properties, maintaining measurement precision while benefiting from the simplified configuration of integrating the sensor into the existing retaining structure
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 enhances the reliability of inspection results by preventing the misclassification of defective products as acceptable, thereby ensuring higher product quality and simplifying the inspection system configuration without additional complexity or cost.
Implementation Method 1
a light receiving device is provided on an irradiated location which is on the retaining device and is irradiated with the light emitted by the illumination device; and the determination unit determines that an inspection condition is not satisfied when a measured value of a luminance measured with the light receiving device is less than or equal to a preset reference value
Implementation Method 2
an illumination device configured to irradiate light onto the object to be inspected that is retained by the retaining tool
Data Source
AI summary
An appearance inspection system is equipped with illumination devices that irradiate light, and retaining tools that retain an object to be inspected. Light receiving devices are disposed at locations (irradiated locations) which are on the retaining tools and are irradiated with the light emitted by the illumination devices. A determination unit of the appearance inspection system determines that an “inspection condition is not satisfied” when a measured value of a luminance measured with the light receiving devices is less than or equal to a preset reference value. Grayscale charts may be provided instead of the light receiving devices.