Electromagnetic Sample Rack Conveying for Stable Speed Control
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Solution Overview
Problem
Conveying systems in sample analysis systems face issues with unstable container carrier speeds, vibrations, and varying conveying performance due to differences in sample weight and surface friction, leading to inefficiencies and potential sample loss.
Innovation Solution
A conveying device with multiple magnetic circuits, a drive circuit, and detection units to adjust current flow based on the position and speed of a permanent magnet, ensuring consistent thrust and minimizing variations in conveying speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a belt drive system is used for conveying samples, then the system structure is simple, but the conveying speed becomes unstable and samples cannot be supplied continuously when conveyance stops due to abnormality
Solution Approach 1:
The patent replaces the mechanical belt drive system with an electromagnetic propulsion system. Electromagnetic actuators generate magnetic fields to propel container carriers along the conveying path, eliminating mechanical contact and friction. This substitution provides more stable and controllable conveying speed while improving reliability, as electromagnetic forces can be precisely regulated and do not suffer from belt wear or slippage issues.
2Speed
If electromagnetic actuators are used to move container carriers, then conveying speed can be increased, but thrust varies depending on container carrier position causing speed instability and vibration
Solution Approach 1:
The patent implements dynamic control of electromagnetic actuators by adjusting current values based on the real-time position of container carriers. The control unit varies current magnitude according to position-specific thrust requirements, creating a dynamic compensation mechanism that maintains constant conveying speed despite position-dependent magnetic field variations. This dynamic adjustment eliminates speed instability and vibration while preserving high-speed conveying capability.
3Stability of the object's composition
If current values to adjacent windings are made different to compensate for position effects, then speed stability improves, but device complexity increases
Solution Approach 1:
The patent employs a feedback control mechanism where a detection unit continuously monitors container carrier position and feeds this information to the control unit. The control unit processes position data and adjusts current values to adjacent windings accordingly, creating a closed-loop control system. This feedback approach achieves speed stability through intelligent regulation rather than complex hardware modifications, balancing performance improvement with manageable system complexity.
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
The solution provides a high-performance conveying system that maintains consistent speed and reduces vibrations, improving the reliability and efficiency of sample transport in sample analysis systems.
Implementation Method 1
a plurality of electromagnetic actuators that are stationary and disposed below the conveying surface and that are adapted to move the container carrier on the conveying surface by applying a magnetic force to the container carrier
Implementation Method 2
a first magnetic body which is provided on a side of a conveyance object; two or more magnetic circuits which each include a core made of a second magnetic body and a winding wound on an outer periphery of the core
Data Source
AI summary
The invention provides a conveying device having a conveying performance higher than that of the related art, a sample analysis system and sample pretreatment device with the conveying device and a method for conveying a conveyance object. A conveying device 1 includes a permanent magnet 10 which is provided on a sample rack 111 side, magnetic poles 25 each of which includes a core 22 made of a second magnetic body and a winding 21 wound around an outer periphery of the core 22, drive circuits 50 each of which supplies a current to the winding 21 of the magnetic pole 25, and current command calculation units 55 each of which controls a value of the current to be supplied to the winding 21 from the drive circuit 50. The current command calculation unit 55 makes the currents to be supplied to the windings 21 vary.