Wheel Lock Detection Using TPMS Backup When WSS Fails
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Solution Overview
Problem
Current systems for determining wheel condition in vehicles face challenges in achieving stable braking due to the reliance on single types of sensors, which can fail simultaneously, leading to instability in autonomous braking systems.
Innovation Solution
An apparatus and method utilizing dual sensors, including a Wheel Speed Sensor (WSS) and a Tire Pressure Monitoring System (TPMS), where the control unit determines wheel locking conditions by using acceleration information from the TPMS when the WSS fails, calculating distance, rotation angle, and rotation speed to ensure accurate braking control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single type of sensor is used for wheel condition detection, then the system structure is simple, but the braking stability deteriorates when the sensor fails
Solution Approach 1:
The patent implements multi-functionality by enabling the TPMS to serve dual purposes: its primary function for tire pressure monitoring and its secondary function for wheel condition detection during braking. The acceleration sensor in the TPMS can detect wheel locking conditions, providing backup sensing capability without requiring a dedicated secondary WSS, thus maintaining system simplicity while improving braking stability
Solution Approach 2:
The patent applies beforehand cushioning by preparing a backup sensing mechanism (TPMS with acceleration sensor) that can take over when the primary WSS fails. The control unit continuously monitors both sensor inputs and pre-configures the fallback logic, ensuring that braking stability is maintained without interruption even when the primary sensor fails
2Stability of the object's composition
If the TPMS is used to secondarily detect wheel locking conditions, then the braking stability is improved through redundant sensing, but the device complexity increases due to additional sensors and signal processing
Solution Approach 1:
The patent merges the wheel condition detection function into the existing TPMS structure by utilizing the acceleration sensor already present in the TPMS. Instead of adding a completely separate secondary sensing system, the invention combines the braking detection capability with the tire pressure monitoring system, reducing overall system complexity while achieving the desired redundancy
Solution Approach 2:
The TPMS serves itself by using its own acceleration sensor to detect wheel locking conditions, eliminating the need for external additional sensors. The control unit processes the acceleration data from the TPMS to determine wheel status, allowing the system to self-monitor and self-diagnose without requiring separate dedicated backup hardware
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 dual-sensor approach enhances braking stability by providing a backup system for determining wheel conditions, allowing for effective intervention in both primary and auxiliary brake apparatuses, thereby improving vehicle safety and stability.
Implementation Method 1
a TPMS detection unit configured to detect the strength of a sensing value signal when receiving the signal from the TPMS
Implementation Method 2
The control unit may determine the wheel condition on whether wheel locking occurs in each wheel, by using acceleration information detected through the TPMS or an acceleration sensor
Data Source
AI summary
An apparatus for determining a wheel condition on whether wheel locking occurs in each wheel of a vehicle having a main brake apparatus and an auxiliary brake apparatus. The apparatus includes: a WSS (Wheel Speed Sensor) configured to primarily detect whether wheel locking occurs; a TPMS (Tire Pressure Monitoring System) configured to secondarily detect whether wheel locking occurs; and a control unit configured to determine, when the WSS fails, a wheel condition indicative of whether wheel locking occurs in each wheel, by using information detected through the TPMS.