Headlamp Assembly Alignment Using Sensor-Based Aim Reference
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Solution Overview
Problem
Conventional vehicle headlamp assemblies are prone to human error and measurement inaccuracies during alignment processes, leading to significant aim variations and increased costs.
Innovation Solution
A method and apparatus that utilize an aiming bracket with a sensor and an electronics control unit to adjust and align the optical axis of the headlamp assembly, storing a reference output when parallel to a predetermined axis, and adjusting the aiming bracket post-installation to maintain alignment, reducing human error and aim variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional manual alignment processes are used for headlamp assemblies, then the alignment can be performed without additional sensors or electronics, but human error and measurement inaccuracies result in large aim variation
Solution Approach 1:
The patent replaces manual mechanical alignment processes with an automated sensor-based system. The sensor detects the position of the headlamp assembly relative to the vehicle, and the electronics control unit processes this data to determine alignment status, eliminating reliance on human operators and manual measurement tools.
Solution Approach 2:
The patent introduces a sensor as an intermediary element between the headlamp assembly and the alignment measurement system. This sensor serves as a mediator that automatically detects and reports the headlamp's position, providing precise measurement data to the control unit without requiring direct human intervention or complex manual measurement procedures.
2Reliability
If multiple alignment processes are performed during production, then comprehensive alignment coverage is achieved, but the process becomes time-consuming and costly
Solution Approach 1:
The patent implements a feedback mechanism where the sensor continuously monitors the headlamp assembly position and provides data to the electronics control unit. The control unit compares the measured position against target alignment parameters and can signal when adjustment is needed, creating a closed-loop system that achieves reliable alignment through iterative feedback rather than multiple separate alignment processes.
Solution Approach 2:
The alignment system performs self-verification through the sensor and control unit, which automatically detect and assess alignment status without requiring external intervention. The system can identify when the headlamp assembly is properly aligned based on sensor data, enabling the process to self-correct and self-validate, reducing the need for multiple manual inspection and adjustment cycles.
3Ease of manufacture
If manual alignment processes are used, then equipment costs are lower, but human error increases measurement inaccuracy and aim variation
Solution Approach 1:
The patent replaces manual mechanical alignment processes with an automated sensor-based system. The sensor detects the position of the headlamp assembly relative to the vehicle, and the electronics control unit processes this data to determine alignment status, eliminating reliance on human operators and manual measurement tools.
Solution Approach 2:
The patent uses the sensor to create an electronic copy or representation of the headlamp assembly's physical position. This digital measurement data can be processed, stored, and analyzed by the control unit, providing a precise record of alignment status that can be compared against target parameters without the variability inherent in manual measurement methods.
Data Source
AI summary
Methods for aiming a headlamp assembly of a vehicle having an aiming bracket and a sensor coupled to the aiming bracket. The method includes adjusting the aiming bracket such that an optical axis of the optical assembly inside of the headlamp assembly is parallel to a predetermined axis). The method further includes storing an output of the sensor when the optical axis is parallel to the predetermined axis. The method further includes installing the headlamp assembly into the vehicle. The method further includes adjusting the aiming bracket such that the output of the sensor equals the stored output.