Conveyor Moving-Element Tracking with Magnetic Encoder Strips
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Solution Overview
Problem
Conventional conveyor tracking systems face challenges in accurately tracking the position and identification of moving elements, particularly in linear motor conveyors, due to issues such as misalignment, hardware requirements, battery-powered tag failures, and the need for physical access, which can cause delays and reduce tracking resolution and accuracy.
Innovation Solution
A system utilizing magnetic and color sensors with encoder strips, including a magnetic encoder strip and a color gradient encoder strip, to provide precise location tracking and identification of moving elements, using a processor to integrate sensor readings and determine the element's position and ID, with integrated illumination for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ID readers are used to track moving elements, then identification can be obtained, but the system requires physical access and may cause delays when items slow down or stop
Solution Approach 1:
The patent replaces mechanical/optical reading systems with magnetic field-based sensing. Magnetic sensors detect the magnetic signature of moving elements without requiring physical contact or line-of-sight access, eliminating the need for items to slow down or stop at readers while maintaining accurate tracking and identification.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the tracking system and moving elements. Magnetic sensors detect changes in magnetic field caused by magnetic markers on moving elements, enabling non-contact identification and tracking that does not interrupt conveyor operation.
2Measurement precision
If magnetic readers are used for position feedback in linear motor conveyors, then real-time position control is achieved, but additional hardware is required for ID tracking
Solution Approach 1:
The patent makes magnetic sensors serve dual functions: they provide both position feedback for motion control and identification tracking. The same magnetic field detection mechanism that enables precise position measurement also captures unique magnetic signatures of moving elements, eliminating the need for separate ID tracking hardware.
Solution Approach 2:
The patent combines position feedback and identification tracking into a single integrated system. Magnetic sensors simultaneously measure position based on encoder strip patterns and identify moving elements based on their unique magnetic signatures, reducing hardware complexity while maintaining both functions.
3Reliability
If optical readers are used for tracking, then non-contact reading is possible, but they are prone to faults due to dirt and inability to read poor labels
Solution Approach 1:
The patent replaces optical sensing with magnetic field sensing. Magnetic sensors are not affected by visual obstructions such as dirt, dust, or poor label quality. The magnetic field penetrates through non-magnetic materials and is unaffected by environmental contaminants, providing reliable detection in harsh manufacturing environments.
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
Enables precise, real-time tracking of moving elements with high resolution and accuracy, allowing continuous monitoring without additional hardware, and eliminating the need for physical access or stopping at readers, thereby enhancing conveyor system efficiency.
Implementation Method 1
magnetic sensors and a magnetic encoder strip to provide precise location tracking
Implementation Method 2
color sensors and a color gradient encoder strip to provide initial location of the moving element
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
A system and method for tracking a location of a moving element on a conveyor system. The system including: magnetic sensors; a magnetic encoder strip that is readable by the magnetic sensors; and a processor for receiving and processing the sensor readings to determine a location of the moving element. The method including: sensing a current location of the moving element, wherein at least one of the magnetic sensors and magnetic encoder are associated with the moving element; and providing a current location to a conveyor system controller. The system may further include: color sensors; and a color gradient encoder strip that is readable by the color sensors, wherein the color gradient encoder strip and color sensors provide moving element location at start up and the magnetic sensors and magnetic encoder strip track moving element location during operation. In this case, the method is adjusted accordingly.