Electromagnetic Sample Conveyance With Coil-Based Position Sensing
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Solution Overview
Problem
Conventional sample conveyance methods using electromagnetic actuators are prone to device failures, require additional space for detection devices, and are influenced by temperature changes and electromagnetic noise, limiting accuracy and reliability.
Innovation Solution
A sample conveyance system using magnetic poles with cores and windings, where a driving unit applies voltages to attract or repel a conveying container, and a position detection unit estimates the container's position based on current values, enhancing stability by using opposite polarities for adjacent magnetic poles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electromagnetic actuators with separate detection devices are used, then position detection capability is provided, but device complexity increases and reliability decreases due to multiple components
Solution Approach 1:
The patent combines the drive winding and detection winding into a single integrated electromagnetic actuator structure. The drive winding generates the primary magnetic field for actuation, while the detection winding simultaneously detects position through induced voltage. This merging eliminates separate detection devices, reducing device complexity while maintaining position detection capability.
Solution Approach 2:
The electromagnetic actuator is designed to perform multiple functions: the drive winding provides both actuation force generation and position detection capability through its electrical characteristics. This multi-functionality allows a single component to replace what would traditionally require separate actuator and sensor components, improving reliability by reducing the number of potential failure points.
2Productivity
If conventional electromagnetic actuators are used, then conveyance function is achieved, but accuracy is reduced due to sensitivity to temperature changes and electromagnetic noise
Solution Approach 1:
The detection winding acts as an intermediary that indirectly measures position through induced voltage rather than directly sensing magnetic field or position. This indirect measurement method through electrical induction is less susceptible to temperature drift and electromagnetic noise compared to direct sensing methods, thereby improving position detection accuracy while maintaining conveyance function.
Solution Approach 2:
The system uses the induced voltage from the detection winding to continuously monitor the position of the magnetic material. This position information is fed back to the control unit, which adjusts the drive winding current to maintain accurate positioning. The feedback mechanism compensates for disturbances from temperature changes and electromagnetic noise, improving overall accuracy.
3Measurement precision
If multiple container carrier detection devices are mounted, then position detection is enabled, but space requirements increase limiting miniaturization
Solution Approach 1:
The detection winding is integrated within the same structural footprint as the drive winding, combining what would traditionally be separate actuator and sensor components into a single compact unit. This integration eliminates the need for additional space to house separate detection devices, enabling miniaturization while maintaining position detection capability.
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 system achieves more stable and accurate sample conveyance by minimizing the impact of temperature changes and electromagnetic noise, improving detection sensitivity and reliability compared to conventional methods.
Implementation Method 1
conveys a conveying container 202 provided with a magnetic material 203 by attracting or repelling the conveying container 202 with an electromagnetic force
Implementation Method 2
a position detection unit that estimates a position of the conveying container 202 based on a value of the current detected by the current detection unit 209
Data Source
AI summary
There are provided a sample conveyance system and a sample conveyance method capable of conveying a sample in a more stable manner than in the related art corresponding to a conveyance method using an electromagnetic actuator. A driving unit 208 applies a first voltage to a first coil 207a located on a front side in a traveling direction of a holder 202, which is selected to attract or repel the holder 202, to excite the first coil 207a and applies a second voltage having a polarity opposite to a polarity of the first voltage to at least one or more of second coils 207b among coils 207 adjacent to the first coil 207a except for the coils 207 in the front side in the traveling direction to excite the second coil 207b, and a control unit 210A estimates a position of the holder 202 based on a value of a current flowing through a winding 206 of the first coil 207a.