Induction Metal Sorting with Amplitude-Phase Ejection Zones
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Solution Overview
Problem
Conventional automated sorting systems for metallic items in waste materials lack efficiency and resolution, particularly in distinguishing and separating metallic items of varying shapes and sizes.
Innovation Solution
The implementation of induction-based all-metal sensing arrays with digital signal processing and a graphical user interface allows for high-resolution identification and sorting of metallic items by defining ejection zones based on amplitude-phase characteristics, using an array of sensors and ejectors to deflect identified items from a stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional automated sorting systems are used, then the system structure is simple, but the measurement precision and sorting resolution are insufficient for metallic items of varying shapes and sizes
Solution Approach 1:
The sensing array is divided into multiple discrete sensor elements arranged in a grid pattern, with each element independently detecting metallic items. This segmentation allows the system to achieve high spatial resolution for identifying metallic items of varying shapes and sizes while maintaining a manageable system structure through modular sensor construction
Solution Approach 2:
The patent transitions from conventional single-point or simple array sensing to a two-dimensional grid array of sensors. This dimensional expansion enables simultaneous measurement of multiple characteristics (amplitude and phase) across different spatial positions, dramatically improving sorting resolution without proportionally increasing system complexity
2Measurement precision
If induction-based all-metal sensing arrays with digital signal processing are implemented, then the sorting resolution improves, but the device complexity and processing requirements increase
Solution Approach 1:
The system employs periodic excitation signals to drive the induction-based sensing array, enabling consistent and repeatable detection of metallic items. This periodic action facilitates systematic data collection across the sensor array, making digital signal processing more manageable through regular sampling patterns and standardized analysis procedures
Solution Approach 2:
The patent creates a digital representation (copy) of the physical sensing array data through amplitude and phase measurements. This digital model allows complex signal processing to be performed on virtual data representations rather than requiring direct manipulation of physical sensor signals, reducing processing complexity while maintaining high identification accuracy
3Measurement precision
If dynamic range adjustment is implemented across all resolutions, then small metallic items down to 1 mm can be accurately identified, but the ease of operation and parameter adjustment complexity increases
Solution Approach 1:
The system implements dynamic range adjustment that automatically adapts to different resolution requirements and item sizes. The sensing array and signal processing parameters can be dynamically modified during operation to optimize detection sensitivity for items as small as 1 mm, while the automated nature of this adjustment maintains ease of operation through reduced manual intervention
Solution Approach 2:
The system performs self-adjustment of detection parameters and dynamic range settings based on the characteristics of items being processed. This self-service capability allows the system to automatically optimize its performance for different item sizes and types without requiring complex manual parameter adjustment, thereby maintaining ease of operation while achieving high detection precision
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 accurate identification and separation of metallic items as small as 1 mm in size, improving sorting efficiency and resolution by dynamically adjusting ejection zones through user-defined parameters and graphical interface manipulation.
Implementation Method 1
An LC resonant circuit including an array of coils is transversely disposed across the path and generates metal detection signals
Implementation Method 2
LC resonant circuit including an array of coils is transversely disposed across the path and generates metal detection signals
Implementation Method 3
the one or more ejectors comprise air nozzles configured to controllably emit an air jet to an area corresponding downstream movement of metallic items
Data Source
AI summary
A system for identifying particular items in a stream of items and for deflecting that type of item from the stream to a different destination. In one embodiment, an LC resonant circuit including an array of coils is transversely disposed across the path and resonates in response to passing metallic items, wherein metal detection signals having an amplitude and a phase are generated. A graphical user interface enables user input with respect to an x-y graph defining amplitude-phase delineations and an ejection zone for the type of metallic item. A controller determines, for each generated metal detection signal, whether a corresponding metallic item is the defined type of metallic item and further within the defined ejection zone, and causes one or more ejectors to controllably eject the corresponding metallic item from the stream to a second destination.