Sorting System Feedback Control for Throughput Optimization
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Solution Overview
Problem
Sorting systems face inefficiencies due to temporary unavailability of target locations, malfunctions, and imbalances in system performance, leading to reduced throughput and handling challenges, with existing solutions lacking clear evaluation of corrective measures' effectiveness.
Innovation Solution
A method that monitors system parameters and applies corrective measures automatically or manually, learning from their effectiveness to optimize sorting performance by adjusting conveyor paths, target allocations, and system control logic, using machine learning and data visualization for self-regulation and evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sorting points are emptied by exchanging containers, then the sorting point becomes available again, but handling effort increases and temporary downtime occurs
Solution Approach 1:
The system performs preliminary actions by proactively identifying when destination points are approaching capacity limits and initiating container exchange operations before the points become completely full. This prevents complete blockage of sorting paths and reduces the need for urgent, disruptive emptying operations that cause downtime.
Solution Approach 2:
The monitoring system continuously tracks the fill status of destination points and provides feedback to the control system. This feedback enables dynamic adjustment of sorting operations and triggers container exchange operations at optimal moments, balancing the need to maintain sorting throughput with minimizing handling effort and downtime.
2Reliability
If sorting items are routed to reject bin due to malfunction, then the sorting system continues operating, but sorting capacity is reduced due to blocked space
Solution Approach 1:
The system extracts problematic sorting items from the main sorting flow and redirects them to a reject bin or alternative processing path. This isolation prevents malfunctioning items from blocking the entire sorting system, allowing the majority of items to continue being sorted efficiently while only the problematic items are removed from the main flow.
Solution Approach 2:
The reject bin serves as an intermediary element that temporarily holds items that cannot be sorted due to malfunctions or errors. This intermediary structure allows the sorting system to maintain continuous operation by providing a buffer that prevents blocked items from stopping the entire sorting process, while still preserving the items for later processing.
3Productivity
If multiple destination locations share the same destination code, then capacity constraints are relieved, but handling effort and complexity increase
Solution Approach 1:
The system segments destination locations that share the same destination code into separate, manageable groups. Each destination point within a group can be independently monitored and managed, allowing the system to distribute items across multiple locations while maintaining clear control over each segment. This segmentation reduces the complexity of managing large-capacity destinations by breaking them into smaller, more controllable units.
Data Source
AI summary
According to the invention, a method for operating a sorting system having a number of sorting systems is disclosed, the method comprising the following method steps: a) providing at least one input line, wherein the input line comprises an input device for the items to be sorted and a component for identifying the item to be sorted or its intended address; b) providing a conveying path, which adjoins the input line and has conveying switches and destination points, the destination points being arranged along the conveying path; c) providing a number of items to be sorted at the at least one input device for a sorting run; d) feeding the number of items to be sorted at the input device and sorting the items to be sorted into the destination points corresponding to the destination codes of the items to be sorted by means of a sorting controller in accordance with a sorting logic, the sorting controller setting the conveying switches, wherein: e) the sorting controller determines parameters representing the sorting performance of the sorting system and compares said parameters with reference values to be reached or exceeded; f) in the case of a negative deviation, a parameter pattern is determined in accordance with the insufficient parameter value and either a correction taken from an action catalog for improving said parameter pattern is automatically applied in the controller of the sorting system or a corrective action manually triggered by an operator is carried out and is tracked with respect to the change in the parameter pattern achieved by said corrective action; and wherein g) if the parameters are actually improved, the manually triggered corrective action is included in the action catalog as a correction learned for said parameter pattern and is available in the future for the application of an automatic correction when said parameter pattern exists. In this way, it is possible to monitor and evaluate the corrective action with respect to its actual effectiveness and, in the case of success, the corrective action can be used again in the future as a learned corrective action for remedy in the event of the previously underlying parameter pattern.