Camera Mount Assembly for Three-Axis Incremental Angle Measurement
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Solution Overview
Problem
Current driver assist and autonomous driving systems face challenges in determining precise spatial relationships between objects and a camera or perception sensor due to assumptions of a flat ground plane and zero rotation about the x and y axes, which limits the accuracy of incremental angle measurements in three axes.
Innovation Solution
A camera mount assembly that allows for incremental angle measurements in three axes, featuring a base structure affixed to a support with multiple leveling and laser devices for precise alignment, and rotational adjustment mechanisms for precise adjustments about the x, y, and z axes, enabling accurate determination of object orientations relative to the camera or perception sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a camera or perception sensor is rotated about all three axes during imaging to determine precise spatial relationships, then the robustness of computer vision datasets is improved, but the complexity of the mount assembly and measurement precision requirements increase
Solution Approach 1:
The mount assembly is divided into three separate rotational adjustment mechanisms, each responsible for one axis of rotation. This segmentation allows independent control and measurement of each rotational degree of freedom, simplifying the overall system while enabling precise three-axis orientation control for robust dataset generation
Solution Approach 2:
Visible marking scales are introduced as intermediary elements between the rotational mechanisms and the measurement process. These scales provide a direct visual reference for angle measurement, eliminating the need for complex electronic sensors while maintaining measurement precision
2Ease of manufacture
If visible marking scales are used for determining rotation degrees, then the manufacturing cost and complexity are reduced, but the measurement precision may be limited compared to electronic sensors
Solution Approach 1:
The visible marking scales create a visual copy or representation of the rotational position that can be read directly. This optical copying method eliminates mechanical complexity of electronic sensors while providing sufficient measurement precision for the application, as the scales simply transfer position information visually to the observer or camera
3Measurement precision
If the camera mount assembly is fixed with respect to a ground plane, then the measurement reference stability is improved, but the adaptability to different imaging scenarios is reduced
Solution Approach 1:
The mount assembly incorporates three rotational adjustment mechanisms that enable dynamic repositioning of the camera or perception sensor relative to the fixed base structure. This allows the system to adapt to various imaging scenarios while maintaining a stable reference frame through the fixed base structure with leveling devices
Solution Approach 2:
The system adds three rotational dimensions (one for each axis) to the fixed base structure, allowing the camera to achieve various orientations in three-dimensional space while the base remains stably fixed to the ground plane. This dimensional expansion provides versatility without compromising reference stability
Data Source
AI summary
A camera mount assembly for holding a camera or other perception sensor that may be fixed with respect to a ground plane and used for incremental angle measurement of the camera or other perception sensor in three axes, such that the precise spatial relationships of imaged objects with respect to the orientation/position of the camera or other perception sensor may be determined. A base structure of the camera mount assembly may be affixed to a fixed or moveable support structure and multiple leveling devices and/or laser devices are provided to establish a reliable reference relative to the ground plane. Thus, the exact orientation of the camera or other perception sensor in space may be determined frame to frame, such that the precise orientation of imaged objects with respect to the orientation/position of the camera or other perception sensor relative to the ground plane may be determined over time.