Wheel Speed Sensor Layout for External Disturbance Detection
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Solution Overview
Problem
Existing wheel speed sensors with multiple Hall IC chips positioned similarly struggle to provide accurate signal information due to external disturbances, leading to inconsistent measurements.
Innovation Solution
A wheel speed sensor design featuring multiple chip units mounted on support units with positional differences along the x-axis, y-axis, and z-axis directions, allowing for distinct detection values and improved signal processing to detect and correct for external disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple Hall IC chips are positioned at the same location to improve measurement accuracy, then the sensor can compare signals for consistency, but all signals are distorted by external disturbances and accurate signal information cannot be provided
Solution Approach 1:
The patent positions multiple Hall IC chips at different spatial locations (different dimensions) relative to the magnetic element, specifically at different radial distances from the rotation axis. This dimensional differentiation allows each chip to experience different external disturbances, enabling the system to detect and correct for these disturbances by comparing measurements across dimensions.
Solution Approach 2:
Each Hall IC chip is positioned at a specific local position with distinct characteristics (different radial distances), giving each chip unique local measurement qualities. This local differentiation allows the system to identify which measurements are affected by external disturbances and which are not, enabling selective weighting or correction of signals.
2Measurement precision
If multiple Hall IC chips are used to improve measurement accuracy, then signal comparison can be performed, but the system cannot quickly detect and correct noise factors
Solution Approach 1:
The system performs preliminary comparison of signals from multiple Hall IC chips positioned at different locations to detect external disturbances before they significantly affect measurement accuracy. By continuously monitoring signal differences between chips at different positions, the system can proactively identify and correct for disturbances, reducing the time needed for correction.
3Device complexity
If Hall IC chips are positioned at the upper end of the magnetic element, then the structure is simple, but all chips acquire the same measured value and cannot detect external disturbances
Solution Approach 1:
Instead of positioning all Hall IC chips at the same location (upper end of magnetic element), the patent distributes them across different dimensional positions, specifically at different radial distances from the rotation axis. This maintains relatively simple sensor structure while enabling disturbance detection through positional differentiation.
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
Enables precise detection of external disturbances and accurate signal transmission by varying the measurement conditions of the chip units, enhancing the sensor's ability to quickly identify and correct noise factors.
Implementation Method 1
The wheel speed sensor refers to a sensor that detects a speed of each of the wheels using a Hall IC chip
Data Source
AI summary
The present disclosure relates to a wheel speed sensor for a vehicle, the wheel speed sensor including: a base unit; a plurality of support units positioned on the base unit; and chip units respectively mounted on the support units and configured to detect a measurement target.