Wheel Rotation Sensor Simulation for Vehicle Testing

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Solution Overview

Problem

Current vehicle testing methods require actual wheel rotation or complex setups to simulate wheel speed, which can be cumbersome and disrupt existing systems, limiting the ability to thoroughly test braking and steering controls without introducing external faults or requiring extensive equipment.

Innovation Solution

A test device with a motor coupled to a rotatable wheel rotation sensor, capable of operating in pulse and velocity modes to simulate wheel rotation and skid conditions, allowing for realistic testing of vehicle systems without the need for actual wheel movement or extensive equipment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If actual wheel rotation is used for testing, then testing reliability is improved, but device complexity and ease of operation deteriorate due to requiring complex test stands and rollers

Engineering Contradiction:

Improvetesting reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent creates a simplified copy of the wheel rotation function by directly rotating the sensor assembly rather than rotating the actual wheel. This copy approach maintains testing reliability while eliminating the need for complex rollers and test stands, thereby reducing device complexity

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent extracts the essential testing function from the complex wheel rotation system by isolating and directly rotating only the sensor assembly. This extraction separates the critical sensing component from the cumbersome mechanical support structures, improving ease of operation while maintaining reliability

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If actual wheel rotation is used for testing, then testing reliability is improved, but ease of operation worsens due to cumbersome setups

Engineering Contradiction:

Improvetesting reliabilityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If complex test setups with rollers are used, then wheel speed simulation is achieved, but device complexity increases

Engineering Contradiction:

Improvewheel speed simulation capabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a simplified copy of the wheel rotation function by directly rotating the sensor assembly rather than rotating the actual wheel. This copy approach maintains wheel speed simulation capability while eliminating the need for complex rollers and test stands, thereby reducing device complexity

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces the complex mechanical roller system with a simpler direct rotation mechanism. By using a motor to directly rotate the sensor assembly, the system achieves the same wheel speed simulation capability without the cumbersome mechanical infrastructure of rollers and test stands

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Adaptability or versatility

If external faults are introduced for testing, then testing completeness is improved, but reliability of existing systems deteriorates

Engineering Contradiction:

Improvetesting completenessVSAvoidreliability of existing systems

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces the sensor assembly as an intermediary component that can be independently rotated and controlled. This intermediary allows comprehensive testing of various wheel conditions (normal rotation, skidding, locking) without directly manipulating or risking the actual wheel system, thereby maintaining reliability while improving testing completeness

Inventive Principle:

Principle #24Intermediary (Mediator)

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 comprehensive testing of vehicle systems, including braking and steering controls, by simulating wheel rotation and skid conditions, thereby increasing testing reliability and efficiency without disrupting existing systems or requiring complex setups.

Implementation Method 1

A test device is provided to simulate rotation of a wheel on a vehicle having a rotatable wheel rotation sensor. The test device includes a motor coupleable to a rotatable portion of the rotation sensor

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Data Source

PatentUS8146411B2Simulating rotation of a wheel

Publication Date: 2012.04.03 LOCKHEED MARTIN CORP

AI summary

A device and method for simulating rotation of a wheel on a vehicle having a rotatable wheel rotation sensor. A motor is coupled to a rotatable portion of the rotation sensor, and is operated to rotate the rotatable portion of the rotation sensor according to a pulse train simulating a wheel skid.