Electromagnetic Specimen Transport with Pulse Width Control
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Solution Overview
Problem
Existing transport devices experience liquid sloshing due to thrust pulsation when switching coils, which is not adequately addressed in prior art.
Innovation Solution
A transport device with a calculation unit that determines the width of pulsed voltage based on the position and current of the object to be transported, stabilizing speed and acceleration by adjusting the energized coil switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If coils are discretely arranged and switched to transport the specimen, then transport capability and speed are improved, but thrust pulsation occurs causing liquid sloshing
Solution Approach 1:
The patent applies periodic action by using pulsed voltage with optimized width to control coil energization. The calculation unit determines the pulsed voltage width based on position and time information, creating a periodic control pattern that smooths thrust delivery while maintaining transport speed, thereby preventing liquid sloshing during specimen transport
Solution Approach 2:
The patent changes the parameter of voltage pulse width dynamically based on the specimen's position and timing information. The calculation unit adjusts the pulsed voltage width to optimize the electromagnetic force profile, transforming the discrete coil switching into a controlled parameter variation that eliminates thrust pulsation while maintaining transport efficiency
2Productivity
If electromagnetic actuators are used for high-speed transport, then productivity is improved, but control precision becomes more difficult
Solution Approach 1:
The patent implements feedback control by using position detection information and time data to calculate and adjust the pulsed voltage width. The calculation unit continuously monitors the specimen's position and uses this feedback to optimize the voltage application timing and duration, enabling high-speed transport with precise position control and preventing liquid sloshing
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
Prevents liquid sloshing and ensures stable transport of specimens by controlling thrust fluctuations, allowing for efficient and reliable specimen handling.
Implementation Method 1
a magnetic pole that is disposed below the transport plane and includes a core and a coil, a drive unit that applies a voltage to the magnetic pole
Implementation Method 2
the drive unit detects a current flowing through the magnetic pole, and the calculation unit detects a position of the transport container on the transport plane based on the detected current
Data Source
AI summary
To prevent liquid sloshing caused by switching a coil to be energized in a transport device. A transport device that transports an object to be transported provided with a magnetic body, the transport device includes: a plurality of coils configured to generate a thrust for transporting the object to be transported; a coil drive unit configured to apply a pulsed voltage to each of the plurality of coils; and a calculation unit. When switching a coil to be energized, the calculation unit determines a width of the pulsed voltage such that a speed or an acceleration of the object to be transported is stabilized based on a position of the object to be transported and a time at which the object to be transported passes through the position or a current flowing through an energized coil in a predetermined period before switching the coil to be energized, and outputs the determined width to the coil drive unit.