Magnetic Sensor Center-Symmetric Layout for Interference Resistance
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Solution Overview
Problem
Existing magnetic sensors suffer from poor anti-interference ability and large circuit area and complex structure, which limits their effectiveness in detecting motion states and position states of objects.
Innovation Solution
A magnetic sensor with a substrate having four sensing assemblies positioned in a center-symmetric convex polygon layout, where two sensing assemblies are aligned along a first direction and the other two along a second direction, enhancing sensitivity in multiple directions and reducing the number of sensing elements required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensing parts are used for comprehensive sensing, then measurement precision is improved, but device complexity increases and circuit area expands
Solution Approach 1:
The patent merges multiple sensing functions into a single integrated sensing part that contains multiple sensing elements arranged in specific patterns. This integration reduces the number of separate components while maintaining comprehensive sensing capabilities, thereby improving measurement precision without proportionally increasing device complexity
Solution Approach 2:
The sensing part is segmented into multiple sensing elements arranged in specific geometric patterns (e.g., triangular, quadrangular arrangements). Each element contributes to different aspects of the measurement, enabling comprehensive detection through a unified structure rather than multiple separate parts
2Measurement precision
If multiple sensing parts are used for comprehensive sensing, then measurement precision is improved, but the number of components increases and cost rises
Solution Approach 1:
Multiple sensing elements are combined within a single sensing part structure, reducing the total number of discrete components while achieving comprehensive sensing. This merger maintains detection accuracy without requiring proportional increases in component quantity
3Measurement precision
If multiple sensing parts are used for comprehensive sensing, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent combines multiple sensing elements into a single integrated sensing part that can be controlled and powered as one unit. This integration reduces energy consumption compared to operating multiple separate sensing parts, while still achieving comprehensive detection through the coordinated work of multiple elements within the unified structure
4Reliability
If sensing assemblies are arranged in center-symmetrical convex polygon layout, then anti-interference ability is improved, but device complexity increases
Solution Approach 1:
The patent employs center-symmetrical arrangements of sensing assemblies in convex polygon configurations, which create balanced geometric patterns that inherently reject certain types of interference. This symmetrical design provides anti-interference capabilities while maintaining relatively simple layout principles that can be systematically implemented
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 magnetic sensor achieves improved credibility and accuracy of detection results by resisting interference and reducing circuit area and energy consumption, making it suitable for applications with small volume and low power consumption requirements.
Implementation Method 1
magnetic sensors are configured to sense based on the distribution pattern of magnetic lines
Data Source
AI summary
The present application discloses a magnetic sensor and state detection device, the magnetic sensor, comprising: a substrate, including a carrying surface; a first sensing assembly, a second sensing assembly, a third sensing assembly and a fourth sensing assembly provided at a first position, a second position, a third position and a fourth position respectively; each of the first sensing assembly and the third sensing assembly comprises two sensing elements spaced apart along a first direction, and each of the second sensing assembly and the fourth sensing assembly comprises two sensing elements spaced apart along a second direction; and the first direction and the second direction form a first angle. The magnetic sensor and state detection device provided by the present application can reduce the demand for the number of sensing elements, achieve lower costs and energy consumption, and save circuit area, while balance interference resistance and high precision.