Magnetic Sensor Noise Suppression via Segmented Elements
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Solution Overview
Problem
Existing sensors face challenges in effectively suppressing noise, which affects their accuracy in detecting magnetic fields.
Innovation Solution
The sensor design incorporates a configuration of first and second magnetic elements, conductive members, and specific current supply configurations to detect target magnetic fields while suppressing noise through the use of AC and DC currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional sensor configurations are used, then device simplicity is maintained, but noise suppression capability deteriorates
Solution Approach 1:
The sensor is divided into multiple magnetic elements (first magnetic element and second magnetic element) with distinct functions. The first magnetic element detects the target magnetic field while the second magnetic element detects noise, allowing separate processing of signal and interference components.
Solution Approach 2:
A third magnetic element is introduced as an intermediary component to detect ambient magnetic fields or noise that affect both the first and second magnetic elements. This intermediary element enables the system to identify and compensate for common-mode interference.
2Measurement precision
If single magnetic element configuration is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The measurement function is segmented across multiple magnetic elements. The first magnetic element measures the total magnetic field (target + noise), while the second magnetic element measures primarily noise, enabling mathematical separation of the target signal through differential processing.
Solution Approach 2:
Each magnetic element is positioned and configured with specific local properties: the first magnetic element is oriented to maximize target field detection, the second magnetic element is positioned to primarily detect noise, and the third magnetic element provides reference measurements. This local optimization of detection qualities improves overall measurement precision.
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 configuration enhances the signal-to-noise ratio (SNR) and improves sensitivity in magnetic field detection, effectively addressing noise suppression issues in existing sensors.
Implementation Method 1
a first magnetic element (11), a second magnetic element (12)... a first electrical resistance of the first magnetic element... a second electrical resistance of the second magnetic element
Data Source
AI summary
According to one embodiment, a sensor includes an element portion. The element portion includes a first magnetic element, a second magnetic element, a first conductive member, and a second conductive member. The first magnetic element includes a first end portion and a first other end portion. A direction from the first end portion to the first other end portion is along a first direction. The second magnetic element includes a second end portion and a second other end portion. A direction from the second end portion to the second other end portion is along the first direction. The first conductive member includes a first portion, a first other portion, a second portion, and a second other portion. The second conductive member includes a first conductive portion, a first other conductive portion, a second conductive portion, and a second other conductive portion.