Polarized Light Inspection for Plastic Cap Incision Quality
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Solution Overview
Problem
Existing methods for inspecting incisions on plastic caps lack precision and accuracy, making it difficult to determine the quality of the incision, the presence of connectors, and their thickness, which can lead to issues with opening containers and product unsellability.
Innovation Solution
A method and device that use polarized and collimated light to illuminate the lateral surface of the cap, combined with optical sensors and image processing to capture and analyze images of the cap's surface, allowing for precise inspection of the incision quality and connector presence, including the use of a conveyor and rotating mechanism to ensure comprehensive coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional inspection methods are used, then the inspection process is simple, but the measurement precision and accuracy of incision quality is insufficient
Solution Approach 1:
The patent replaces conventional mechanical or simple visual inspection methods with an optical-based inspection system. The device uses light sources, optical sensors, and image processing to detect incision quality, connector presence, and thickness, substituting physical contact or human inspection with non-contact optical measurement to achieve higher precision without mechanical complexity
Solution Approach 2:
The patent employs multiple light sources with different wavelengths or characteristics to illuminate the cap from various angles. By changing the illumination parameters (light intensity, angle, wavelength), the system enhances the visibility of incision features and connector details, allowing the optical sensor to capture variations in reflected light that indicate quality defects
2Measurement precision
If multiple inspection parameters are measured, then the inspection accuracy improves, but the inspection time increases
Solution Approach 1:
The patent implements a continuous inspection system where the cap moves through an inspection zone while being illuminated and scanned by optical sensors. The system continuously captures images and processes data in real-time rather than stopping at multiple inspection stations, allowing simultaneous measurement of incision quality, connector presence, and thickness without increasing inspection cycle time
Solution Approach 2:
The patent combines multiple inspection functions into a single integrated device. The same optical sensor and image processing system simultaneously detects incision quality, connector presence, and thickness by analyzing different features of the captured images, eliminating the need for separate inspection steps and reducing total inspection time
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 solution provides reliable and accurate inspection of incisions and connectors, enhancing the ability to assess the quality of the cap's incision and ensuring proper functionality, reducing the risk of unsellable products.
Implementation Method 1
The light is preferably polarized
Implementation Method 2
The light is preferably collimated along a light orientation towards the inspection zone
Implementation Method 3
the incision keeps a darker colour and, hence, is possible to identify better the presence of the incision
Data Source
AI summary
A method for inspecting an incision made on a lateral surface of a plastic cap includes the following steps: conveying the plastic cap along an inspection path through an inspection zone in which the cap is inspected; emitting a polarized light collimated along a light orientation towards the inspection zone; capturing image data representing at least one image of the lateral surface of the cap through an optical sensor; receiving the image data in a control unit; processing the image data to derive information about the incision.