Sensor Bracket Inclination Correction via Parallel Reference Surfaces
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Solution Overview
Problem
Existing sensor brackets attached to curved windshields face challenges in maintaining accurate positioning and axis alignment, leading to potential inaccuracies in obstacle detection due to inclination issues.
Innovation Solution
A sensor bracket with a plate-shaped bracket body featuring parallel planar portions on its back surface, which serve as reference surfaces for detecting inclination and improving attachment accuracy by measuring distances between these surfaces and the glass, allowing for precise calculation of the inclination angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a curved bracket is attached to a curved windshield, then the appearance and stability are improved, but the positioning accuracy between the on-board camera main body and the bracket deteriorates due to inclination
Solution Approach 1:
The patent replaces mechanical positioning methods with optical measurement methods. An inclination detection unit uses optical sensors to detect the inclination of the bracket relative to the windshield, and a calculation unit computes correction values based on these optical measurements, thereby achieving precise positioning without complex mechanical adjustment mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where the inclination detection unit continuously monitors the bracket's inclination angle, and the calculation unit uses this feedback information to compute real-time correction values for the camera's positioning, ensuring accurate detection despite variations in windshield curvature or attachment conditions.
2Adaptability or versatility
If the bracket becomes inclined on a curved windshield, then attachment flexibility is improved, but the obstacle detection accuracy deteriorates due to axis deviation
Solution Approach 1:
The patent changes the parameter being measured from absolute position to relative inclination angle. By detecting the inclination angle of the bracket and using this parameter to calculate correction values, the system maintains obstacle detection accuracy regardless of the bracket's absolute orientation or inclination on the curved windshield.
Solution Approach 2:
The patent replaces mechanical alignment mechanisms with optical inclination detection and computational correction. Instead of using complex mechanical systems to ensure the bracket is perfectly aligned, the system uses optical sensors to detect inclination and calculates correction values to compensate for any misalignment.
3Measurement precision
If multiple planar portions are provided on the bracket body for inclination detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the bracket's back surface into multiple planar portions at different locations. By providing inclination detection units that measure the inclination relative to multiple separate planar surfaces, the system achieves more accurate three-dimensional inclination detection through segmented measurements rather than requiring a single complex measurement system.
Solution Approach 2:
The patent makes the inclination detection system multi-functional by using the same basic inclination detection unit structure to measure inclination relative to multiple different planar portions. This universal detection unit can be applied to various surfaces and orientations, reducing overall system complexity while improving measurement precision through multiple reference points.
Data Source
AI summary
A sensor bracket includes a plate-shaped bracket, a front surface of which is attached to an inner surface of a windshield of a vehicle, the plate-shape bracket having a camera that detects a state around a vehicle mounted on a back surface, reference surfaces provided on a back surface of the plate-shaped bracket, the reference surfaces being parallel to each other.