Camera Stay Movable Installation Section Thermal Expansion
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Solution Overview
Problem
Conventional distance measurement devices for vehicles experience accuracy deterioration due to thermal expansion, as the camera stay, not securely mounted to the vehicle housing, expands differently from the installation section, causing displacement of the baseline and optical axes between cameras.
Innovation Solution
A distance measurement device with a movable installation section between the pair of cameras, secured to the vehicle housing, allows the installation section and securing body to expand or contract uniformly with temperature, preventing baseline and optical axis displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the camera stay is securely mounted to the vehicle housing, then the installation section maintains stable position, but the camera stay cannot expand uniformly with temperature changes causing baseline displacement
Solution Approach 1:
The camera stay is designed with a movable connection to the vehicle housing, allowing it to dynamically adjust its position in response to thermal expansion. The connection includes a moving section that permits the camera stay to shift along the baseline direction, enabling uniform expansion with temperature changes while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces a movable connection mechanism that changes the physical state of the mounting system from fixed to adjustable. This allows the camera stay to change its position parameter in response to temperature variations, ensuring that both the installation section and camera stay expand uniformly and maintain accurate baseline spacing.
2Strength
If the installation section is fixed rigidly to prevent movement, then structural stability is improved, but thermal expansion differences cause baseline and optical axis displacement
Solution Approach 1:
The connection between the installation section and vehicle housing is designed to be movable rather than rigidly fixed. This dynamic connection allows the camera stay to expand uniformly with temperature while maintaining structural integrity and baseline alignment precision through controlled movement along the baseline direction.
Solution Approach 2:
A movable connection mechanism acts as an intermediary between the installation section and the vehicle housing. This intermediary allows thermal expansion to occur uniformly across both components while maintaining the structural stability needed for precise baseline and optical axis alignment.
3Measurement precision
If the camera stay is not secured to the housing, then thermal expansion uniformity is improved, but the installation section becomes unstable
Solution Approach 1:
The camera stay is connected to the vehicle housing through a movable connection that allows controlled movement. This dynamic connection provides position stability for the installation section while enabling the camera stay to expand uniformly with temperature, resolving the contradiction between stability and thermal expansion compatibility.
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
This design enhances distance measurement accuracy by ensuring the baseline and optical axes remain stable, improving inter-vehicle distance detection and obstacle sensing precision compared to conventional devices.
Implementation Method 1
the installation section and the securing body expand or contract in the same manner in response to temperature
Data Source
AI summary
A distance measurement device having better measurement accuracy than conventional distance measurement devices. A stereo camera (1) has a camera stay (4) to be secured to a housing (12) of a vehicle and also has a pair of cameras (2, 3) mounted on the camera stay (4). The camera stay (4) has an installation section (4a) located between the pair of cameras (2, 3) and to be mounted on the housing of the vehicle via fixation sections (6, 7, 8). The installation section (4a) is movable in the direction of a base line interconnecting the cameras (2, 3).