Mobile Light Indicators for Parcel Sorting Accuracy
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Solution Overview
Problem
Existing parcel sorting systems require packages to be transported one by one and are limited by predictive methods that do not handle unforeseen behavior, leading to sorting errors and inefficiencies.
Innovation Solution
A sorting method that uses digital image acquisition and real-time analysis to track parcels and control light indicators along a conveyor, ensuring accurate sorting by matching the length of the light segment to the parcel's dimension, allowing for robust tracking and identification even during unexpected movements or blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packages are transported one by one with predictive tracking methods, then sorting accuracy is maintained, but conveyor productivity and throughput are reduced
Solution Approach 1:
The patent replaces the mechanical/predictive tracking system with an optical imaging and image processing system. Digital images are captured by imaging means and processed to determine actual package positions and dimensions in real-time, substituting the predictive mathematical model with direct optical measurement. This allows multiple packages to be tracked simultaneously without requiring them to be spaced apart, resolving the contradiction between sorting accuracy and throughput.
Solution Approach 2:
The patent creates a digital copy of the physical package arrangement through digital imaging. Instead of physically separating packages or using predictive calculations, the system captures optical copies (images) of packages and processes these images to track positions and dimensions. This copying approach enables simultaneous tracking of multiple packages, increasing conveyor productivity while maintaining sorting accuracy through precise image-based position determination.
2Device complexity
If predictive methods are used to track package position, then system complexity is reduced, but adaptability to unexpected behavior and blockages is poor
Solution Approach 1:
The patent implements a feedback mechanism where digital images are continuously captured and processed to determine actual package positions and dimensions. This real-time visual feedback allows the system to detect and adapt to unexpected behaviors such as package blockages, misplacements, or dimensional variations. The image processing system provides continuous feedback on package location, enabling dynamic adjustment of sorting operations while maintaining manageable system complexity through standardized imaging and processing algorithms.
3Device complexity
If light indicator length is fixed, then device complexity is reduced, but manufacturing precision of visual indication deteriorates
Solution Approach 1:
The patent applies dynamics by making the light indicator length variable rather than fixed. The length of the illuminated light segment is dynamically adjusted based on the actual dimension of each package extracted from digital images. The control system calculates the required light segment length from image data and adjusts the illumination accordingly, ensuring the visual indication precisely matches each package's dimensions. This dynamic adjustment maintains high visual indication accuracy while managing system complexity through software-based control.
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3A~3C
AI summary
A method for sorting parcels in which parcels 110 are transported by a conveyor 100 to an operator Op transferring the parcels into sorting outlets 130, with light indicators for assisting sorting that move with the parcels along the conveyor, each indicator being associated with one of the parcels, the method involving acquiring digital images of said parcel moving on the conveyor, extracting information from the photographs concerning the position of said parcel and its dimension in the direction of movement thereof in order to track this parcel in real time and, based on this tracking, controlling the light sources in real time in such a way as to form a light indicator in the form of a light segment 122 having a length L substantially equal to the dimensions D of said parcel with which it is associated.