Redundant Wheel Speed Sensor Layout for Brake Control Reliability
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Solution Overview
Problem
Conventional wheel speed sensors mounted on wheel bearings are prone to instability and loss of steering ability during braking due to the lack of redundancy, as they rely on a single sensing part for detecting rotational speed, which can lead to inaccurate information transmission and unstable vehicle control, especially in autonomous vehicles.
Innovation Solution
A wheel speed sensor configuration with multiple independent sensing parts, each with its own connector and housing, allowing for continued operation even if one sensing part fails, enhancing redundancy and reliability by ensuring that the rotational speed can be detected by another sensing part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sensing part is used in the wheel speed sensor, then the device complexity is reduced, but the reliability deteriorates because accurate rotational speed information cannot be provided when abnormality occurs in the sensing part
Solution Approach 1:
The wheel speed sensor is divided into multiple independent sensing parts (first sensing part, second sensing part, etc.), each capable of independently detecting rotational speed. This segmentation allows the system to maintain detection functionality even when one sensing part fails, thereby improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
Each sensing part is equipped with its own terminal portion and connector, providing localized functionality. This local quality approach ensures that failure in one local component (sensing part) does not affect the entire sensor system, as other sensing parts with their own terminal portions and connectors can continue to operate independently.
2Reliability
If multiple sensing parts with separate terminal portions and connectors are provided, then the redundancy is improved, but the device complexity increases
Solution Approach 1:
The sensor system is segmented into multiple independent units, each with its own sensing part, terminal portion, and connector. This segmentation creates redundant detection pathways, ensuring that if one unit fails, others can continue to provide rotational speed information, thereby improving reliability while managing complexity through modular design.
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 solution improves operational reliability and stability of vehicle control systems by enabling continued detection of wheel rotational speed even if one sensing part fails, reducing the risk of vehicle instability and enhancing the sensor's lifespan.
Implementation Method 1
detect a change in magnetic field generated due to the rotating sensor target 70
Data Source
AI summary
A wheel speed sensor mounted on a wheel bearing to detect a rotational speed of a wheel is provided. The wheel speed sensor according to an embodiment of the present disclosure may comprise: a housing having a sensing module provided therein; a first sensing module configured to detect a rotational speed of the wheel and to output a first detection signal to an outside; and a second sensing module configured to detect a rotational speed of the wheel independently of the first sensing module and to output a second detection signal to the outside. According to an embodiment of the present disclosure, the first sensing module may comprise a first sensing part configured to detect a rotational speed of the wheel, and the second sensing module may comprise a second sensing part configured to detect a rotational speed of the wheel.