Magnetic Conveyor for Hypotrochoid Scan Patterns
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Solution Overview
Problem
Existing conveyor mechanisms for spectroscopic analysis in agricultural and food production operations lack the capability to implement complex scan patterns necessary for accurate particulate analysis, as they only allow for either linear or orbital translation, but not a combination of both, which is essential for optimal sample presentation and analysis.
Innovation Solution
A conveyor system featuring a sample truck with a spur gear and a subsurface magnetic translation mechanism, including a sled on parallel rails for linear translation and a stepper motor with a rotary paddle for indexed rotation, controlled by a processor to achieve complex hypotrochoid or epitrochoid scan patterns by combining linear and orbital translation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple linear translation mechanism is used, then the device complexity is reduced, but the scan pattern capability is limited and cannot achieve optimal particulate analysis
Solution Approach 1:
The patent combines linear translation mechanism (sled on rails) and orbital translation mechanism (magnetic drive ring with magnets) into a single integrated conveyor system. This merging allows the sample cup to execute both linear movement across the platen surface and orbital movement around the scanning window, achieving complex hypotrochoid scan patterns that optimize particulate analysis while maintaining a unified mechanical structure.
Solution Approach 2:
The conveyor mechanism is designed to perform multiple functions: linear translation for positioning samples at different locations, orbital translation for scanning around the window, and magnetic coupling for contactless drive transmission. This multi-functionality enables a single mechanism to handle diverse scan pattern requirements without adding separate independent systems.
2Ease of operation
If a magnetic drive ring with embedded magnets is used, then the sample cup rotation is achieved without exposed moving parts, but linear positioning capability across the platen is lost
Solution Approach 1:
The patent divides the conveyor system into two independent functional segments: a magnetic drive ring system for orbital rotation of the sample cup, and a separate sled-on-rails linear translation system for positioning. The magnetic drive ring remains hidden beneath the platen while the sled provides linear positioning capability, allowing both functions to coexist without interference.
Solution Approach 2:
The sled on parallel rails acts as an intermediary mechanism that decouples the magnetic drive system from the linear positioning function. The sled carries the sample cup and moves linearly along the rails while the magnetic drive ring operates independently beneath the platen, enabling both orbital and linear movements through separate but coordinated systems.
3Measurement precision
If multiple independent motors are used for linear and orbital translation, then the scan pattern precision is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The patent employs feedback mechanisms where the sled position along the rails is monitored and fed back to the control system, and the angular position of the sample cup is tracked during orbital movement. This feedback enables precise coordination of linear and orbital translations to achieve accurate hypotrochoid scan patterns while simplifying control through closed-loop coordination rather than requiring multiple independent high-precision motors.
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 more accurate and efficient particulate analysis by ensuring consistent sample presentation and automation, allowing for precise linear and rotational movement of the sample relative to the scanning window, thereby improving the accuracy and efficiency of spectroscopic analysis.
Implementation Method 1
a stepper motor mounted on the sled with a rotary paddle having an array of magnets attached thereto. The paddle magnetically engages and indexes rotation of the drive gear.
Implementation Method 2
The drive gear has a plurality of magnets embedded therein, and a second plurality of magnets is affixed to the sample truck.
Implementation Method 3
a sled mounted on parallel rails for linear translation there along
Data Source
AI summary
An improved sample conveyer for articulating a sample across the flat platen of a spectrum analyzer relative to a scan window in the platen. The conveyor includes a sample truck configured for movement across the surface of the platen, the sample truck having a scan aperture. A spur gear is rotatably mounted about the aperture, and a drive gear is engaged to the spur gear. The drive gear has a plurality of magnets embedded therein, and a second plurality of magnets is affixed to the sample truck. A translation mechanism resides beneath the platen which includes a sled mounted on parallel rails for linear translation there along, and a motor mounted on the sled. Magnets on both the sled and drive gear index and engage corresponding magnets on the sample truck to implement complex orbital, hypotrochoid or epitrochoid scan patterns for more accurate particulate analysis.