Dynamic Axle Alignment Measurement Using Laser Displacement Sensors
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Solution Overview
Problem
Current vehicle wheel alignment measurement systems require vehicles to be stationary for accurate measurements, which is time-consuming and may lead to undetected alignment issues, especially during busy periods in service shops.
Innovation Solution
A vehicle measurement station using non-contact laser displacement sensors on both sides of a sensor region to acquire data from moving vehicles, allowing for quick and accurate wheel alignment measurements without the need for the vehicle to stop or for technicians to attach optical targets, while accounting for variations in speed and steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wheel alignment measurement systems are used, then measurement precision is improved, but measurement time increases and productivity decreases
Solution Approach 1:
The system transitions from static measurement (vehicle stationary) to dynamic measurement (vehicle moving). Sensors capture wheel alignment data while the vehicle passes through the measurement zone, enabling continuous data acquisition during motion rather than requiring the vehicle to stop and remain stationary during measurement.
Solution Approach 2:
The system performs preliminary wheel alignment assessment during the initial vehicle intake process before the vehicle enters service. By capturing measurement data as the vehicle first passes through the measurement zone, the system identifies alignment issues early, allowing technicians to prioritize or schedule appropriate services without delaying other customers.
2Measurement precision
If traditional wheel alignment measurement systems are used, then measurement precision is improved, but device complexity increases due to optical targets and manual procedures
Solution Approach 1:
The system eliminates the need for technicians to manually attach optical targets or perform preparation procedures. The vehicle's existing wheel assemblies serve as the measurement targets, and sensors automatically capture data as the vehicle passes through. The system self-calibrates and processes measurements without requiring technician intervention for target attachment or removal.
Solution Approach 2:
The system extracts and eliminates unnecessary components from the traditional measurement process, specifically removing the requirement for optical targets, inclinometers, and manual measurement tools. By using the vehicle's own wheel geometry as the measurement reference, the system simplifies the overall measurement apparatus while maintaining accuracy.
3Productivity
If quick check inspection systems are used, then productivity is improved, but measurement precision deteriorates due to vehicle movement
Solution Approach 1:
The system continuously monitors and tracks the vehicle's position and movement characteristics during the measurement process. By capturing multiple data points as the vehicle passes through the measurement zone and using these measurements to calculate wheel alignment parameters, the system compensates for vehicle motion and maintains measurement accuracy despite the dynamic measurement conditions.
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 rapid acquisition of preliminary vehicle measurements as vehicles pass through the measurement station, improving efficiency and ensuring that vehicles in need of alignment services are identified without delaying other customers.
Implementation Method 1
at least one pair of non-contact imaging sensors disposed on opposite sides of a sensor region to acquire measurement data associated with a moving vehicle passing through the sensor region... by measuring distances between each sensor and an associated laser spot projected onto an observed surface
Implementation Method 2
measuring distances between each sensor and an associated laser spot projected onto an observed surface of the vehicle
Data Source
AI summary
A vehicle measurement station utilizing one or more displacement sensors disposed on each opposite side of an inspection region of a vehicle inspection lane to acquire displacement measurement data along associated measurement axes. At least a portion of the displacement measurement data is associated with the outermost wheel assemblies on an axle of a moving vehicle passing through the inspection region, and utilized to determine one or more vehicle characteristics, such as an axle total toe condition.