Magneto-Optical Sensor Noise Reduction via Regression
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Solution Overview
Problem
Magneto-optical measurement apparatuses face challenges in achieving accurate and efficient measurements due to the time lag between positive and negative magnetic field measurements, noise interference, and the need for light source stabilization, which affects power consumption and measurement speed, especially in portable devices.
Innovation Solution
A magneto-optical measurement apparatus that alternately applies positive and negative magnetic fields to a thin-film sensor, using regression formulas to determine output values based on light reflected under both fields, and employs a semiconductor light source with controlled pulsing to stabilize output, enabling simultaneous measurement and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light source is continuously stabilized before measurement, then measurement precision is improved, but power consumption increases and measurement time is delayed
Solution Approach 1:
The patent applies preliminary action by stabilizing the light source output before measurement begins. The control unit waits for the light source to reach a stable state after power-on or after interruptions, ensuring that measurements are taken only when the light output is consistent and reliable, thereby avoiding inaccurate readings due to instability.
Solution Approach 2:
The patent implements periodic action by periodically checking the stability of the light source output and periodically restarting measurements if instability is detected. The system continuously monitors light output and can re-initiate stabilization processes as needed, ensuring ongoing measurement accuracy without requiring continuous stabilization from the beginning.
2Measurement precision
If the light source is continuously stabilized before measurement, then measurement precision is improved, but the time required for measurement increases
Solution Approach 1:
The patent applies preliminary action by stabilizing the light source output before measurement begins. The control unit waits for the light source to reach a stable state after power-on or after interruptions, ensuring that measurements are taken only when the light output is consistent and reliable, thereby avoiding inaccurate readings due to instability.
Solution Approach 2:
The patent implements periodic action by periodically checking the stability of the light source output and periodically restarting measurements if instability is detected. The system continuously monitors light output and can re-initiate stabilization processes as needed, ensuring ongoing measurement accuracy without requiring continuous stabilization from the beginning.
3Productivity
If measurements are taken during light source stabilization, then productivity is improved, but measurement precision deteriorates due to noise interference
Solution Approach 1:
The patent applies preliminary action by stabilizing the light source output before measurement begins. The control unit waits for the light source to reach a stable state after power-on or after interruptions, ensuring that measurements are taken only when the light output is consistent and reliable, thereby avoiding inaccurate readings due to instability.
Solution Approach 2:
The patent converts the potential harm of light source instability into a benefit by using the stabilization period to establish a baseline for noise cancellation. The system measures and stores characteristic noise patterns during the stabilization phase and uses these to subtract background noise from subsequent measurements, thereby improving precision despite the time required for stabilization.
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
This approach allows for accurate and efficient measurement of Kerr output values with reduced noise interference and power consumption, facilitating faster and more reliable magneto-optical measurements without the need for prolonged light source stabilization.
Implementation Method 1
a magnetic field generation device configured to apply a magnetic field to the thin-film sensor
Implementation Method 2
detecting a gas or optical rotation using a loop of output (the amount of light or the polarization angle) by Kerr effect
Data Source
AI summary
A magneto-optical measurement apparatus includes a light source, a thin-film sensor including a magnetic film and reflecting light from the light source, a magnetic field generation device applying a magnetic field to the thin-film sensor, and a controller. The magnetic field generation device is configured to alternately supply a positive magnetic field and a negative magnetic field to the thin-film sensor. The controller is configured to measure the amount of light reflected by the thin-film sensor under the positive magnetic field, measure the amount of light reflected by the thin-film sensor under the negative magnetic field, determine one or more regression formulae from the values measured under the positive magnetic field and the values measured under the negative magnetic field, and determine a predetermined output value based on the one or more regression formulae.