Sorter Belt Timing Markers for Accurate Package Diversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sorter systems face challenges in maintaining sortation accuracy due to changes in belt properties such as thermal expansion, contraction, and wear, leading to intermittent surging and difficulties in tracking packages, especially in longer conveyor systems.
Innovation Solution
A sorter system with a conveying surface featuring multiple timing sections and markers, coupled with sensors along the frame, allows for precise detection of package offsets and destinations, enabling accurate diversion of packages by continuously recalibrating for belt expansion or contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a long activated roller belt conveyor system is used, then the conveying capacity is improved, but the belt properties change more pronouncedly due to thermal expansion and contraction
Solution Approach 1:
The patent divides the continuous belt into multiple discrete timing sections (e.g., 12 sections) with known pitches between adjacent sections. Each section has associated sensors that detect when it passes a reference point. This segmentation allows the system to track package position relative to specific, known locations along the belt rather than relying on continuous measurement over the entire long belt, thereby maintaining sortation accuracy despite thermal expansion and contraction of the overall belt structure.
2Length of stationary object
If the belt length increases, then the conveying distance is improved, but the belt is more prone to intermittent surging
Solution Approach 1:
The patent employs sensors positioned at multiple timing sections to provide continuous feedback on belt position and package location. The control system uses this feedback to detect and compensate for belt surging or instability in real-time, allowing for dynamic adjustments that maintain stable package conveying despite the increased belt length that makes surging more pronounced.
3Ease of manufacture
If plastic links are used for the belt, then the ease of manufacture is improved, but the belt properties are more susceptible to environmental changes
Solution Approach 1:
The patent accounts for the environmental sensitivity of plastic belt links by implementing a calibration system that measures actual belt position at multiple timing sections and adjusts package position calculations accordingly. The system compensates for changes in belt properties caused by temperature, humidity, and other environmental factors, allowing the use of easily manufactured plastic links while maintaining consistent and reliable sortation performance.
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
Enhances sortation accuracy and reliability by reducing estimation reliance, tolerating belt length changes, and providing faster control with simultaneous physical measurements, improving package tracking and diversion precision.
Implementation Method 1
Each of the timing sections include a marker (or a plurality of markers). A plurality of sensors are fixed along a length of the frame, where the sensors are configured to output trigger signals at times that markers of the timing sections are proximate the sensors
Data Source
AI summary
A sorter system includes a frame, a conveying surface, sensors, and a control system. The conveying surface is configured to move relative to the frame in a direction of conveyance. The conveying surface includes timing sections spaced apart from each other with known pitches between adjacent timing sections, wherein each of the timing sections comprises a marker. The sensors are fixed along a length of the frame. The sensors are configured to output trigger signals as the sensors are proximate while the conveying surface moves relative to the frame. The control system is configured to detect a first offset between a package and a particular marker, detect a second offset between the particular marker and a destination for the package, and cause the conveying surface to divert the package in a direction perpendicular to the direction of conveyance based on the first offset and the second offset.