LKA Calibration Device Using Laser and Pattern Board
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Solution Overview
Problem
Current LKA systems lack a universal calibration device, requiring different pattern boards and algorithms for various vehicle models, leading to inefficiencies in sensor alignment and calibration due to changes in sensor mounting states caused by vibrations, collisions, and environmental factors.
Innovation Solution
A calibration device comprising a support apparatus with a horizontal graduated scale, laser, reflector, and pattern board, allowing for precise alignment and calibration of LKA systems across different vehicle models by using a diaphragm to control the laser beam and a sliding member for accurate positioning, facilitating the attachment of alignment patterns based on vehicle models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If different pattern boards and algorithms are used for various vehicle models, then calibration can be performed for each specific model, but device complexity and calibration time increase significantly
Solution Approach 1:
The patent applies universality by designing a single standardized pattern board that can be used across different vehicle models. The pattern board features a universal coordinate system and standardized geometric patterns that work with various LKA sensor configurations, eliminating the need for model-specific calibration tools while maintaining calibration accuracy
Solution Approach 2:
The patent utilizes parameter changes by incorporating adjustable elements in the calibration system, such as movable reference markers and adjustable measurement distances. These parameters can be modified to accommodate different vehicle models and sensor positions, allowing one standardized device to adapt to multiple applications without losing precision
2Device complexity
If software-based correction is used for sensor alignment, then calibration can be performed without additional hardware, but measurement precision deteriorates due to algorithmic limitations
Solution Approach 1:
The patent introduces a physical pattern board as an intermediary between the LKA sensor and the calibration process. This pattern board provides tangible reference markers with known geometric relationships, enabling the sensor to directly measure physical distances and angles rather than relying solely on software algorithms to correct mounting errors
Solution Approach 2:
The patent replaces software-based virtual correction with a physics-based optical measurement system. The LKA sensor directly measures the physical pattern board using optical principles, obtaining precise alignment data through direct geometric measurement rather than computational correction, thereby improving measurement precision
3Reliability
If sensors are mounted at appropriate angles and positions, then LKA system performance is optimized, but sensor mounting state changes due to vibrations and environmental factors
Solution Approach 1:
The patent applies preliminary action by performing calibration at multiple stages: initial calibration during sensor installation, periodic calibration during maintenance intervals, and on-demand calibration when alignment issues are detected. This multi-stage approach proactively maintains sensor alignment stability before degradation occurs
Solution Approach 2:
The patent implements feedback mechanisms where the calibration system continuously monitors sensor alignment by repeatedly measuring reference markers on the pattern board. When deviations are detected, the system provides feedback for realignment, creating a closed-loop control system that maintains stable sensor mounting despite environmental disturbances
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 precise calibration of the centerline of vehicles, ensuring accurate alignment of LKA systems for different models, improving calibration efficiency and consistency across various vehicle configurations.
Implementation Method 1
a laser (400), configured to be mounted on a body of an automobile and to emit a laser beam to the horizontal graduated scale (2020)
Implementation Method 2
emit a laser beam
Implementation Method 3
The reflector is configured to reflect the laser beam that passes through the diaphragm to the laser
Data Source
AI summary
The present invention relates to the technical field of automobile maintenance and discloses a calibration device for a lane keeping assist (LKA) system. The calibration device includes a support apparatus, a laser and a pattern board. The support apparatus includes a horizontal graduated scale. The laser is configured to be mounted on the body of an automobile and to emit a laser beam to the horizontal graduated scale. The pattern board is mounted on the support apparatus and is configured to attach an alignment pattern. By means of the calibration device, two lasers are mounted on wheels on two sides of the automobile. Two laser beams that are emitted from equal distances with the wheels being reference points are irradiated to the horizontal graduated scale. Based on marks on the horizontal graduated scale, the support apparatus may be moved to an appropriate position to calibrate the centerline of the automobile.