Autonomous Vehicle Sensor Housing Color Layout for Heat and Glare
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Solution Overview
Problem
Sensor systems in vehicles are adversely affected by temperature changes and ambient light, leading to operational issues such as artifacts in sensor data, overheating, or failure, particularly in autonomous driving modes.
Innovation Solution
The use of a contrasting color scheme on sensor housing assemblies, including different colors and surface types like matte or glossy finishes, to mitigate glare, reflections, and thermal management, with colors selected based on thermal budgets and sensor types, such as using darker colors on vertical surfaces and lighter colors on horizontal surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are placed on exterior parts of the vehicle, then the sensor can detect objects or environmental conditions, but the sensor is adversely affected by temperature changes and ambient light
Solution Approach 1:
The patent applies different colors to different surfaces of the sensor housing assembly. Lighter colors are used on horizontal surfaces to reflect sunlight and reduce thermal loading, while darker colors are used on vertical surfaces to minimize reflections into the sensor. This local differentiation of surface properties addresses the harmful effects of ambient light and temperature at specific locations on the housing.
Solution Approach 2:
The patent utilizes color changes in the housing surfaces to modify light interaction. Lighter colors reflect more sunlight and reduce thermal absorption, while darker colors reduce reflections. This application of color theory directly addresses the harmful effects of ambient light and temperature on sensor operation.
2Ease of manufacture
If the sensor housing uses a single color, then the manufacturing is simpler, but the thermal management and light reflection control is less effective
Solution Approach 1:
The patent differentiates the housing into multiple surfaces with different color properties. Horizontal surfaces use lighter colors for thermal management, while vertical surfaces use darker colors for reflection control. This local quality differentiation improves thermal management effectiveness while maintaining a relatively simple manufacturing process through standard multi-color coating techniques.
3Shape
If the sensor housing uses reflective surfaces, then the aesthetic appearance is improved, but the sensor generates artifacts due to reflections
Solution Approach 1:
The patent applies darker colors to vertical surfaces that are adjacent to or facing the sensor openings. This local treatment minimizes reflections that could enter the sensor and create artifacts, while lighter colors on horizontal surfaces provide aesthetic contrast and thermal management. The result is a housing with acceptable aesthetics that does not compromise sensor data quality.
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 approach enhances the operational reliability of sensor systems by reducing thermal loads and light reflections, thereby improving the accuracy and longevity of sensor data in various environmental conditions.
Implementation Method 1
The first color absorbs less heat than the second color
Implementation Method 2
the second color reflects less visible or near infrared light than the first color
Implementation Method 3
The surface of the first upper section having the second color may have a matte finish to reduce reflections or to reduce stray visible or near infrared light into the sensor module
Data Source
AI summary
The technology employs a contrasting color scheme on different surfaces for sensor housing assemblies mounted on exterior parts of a vehicle that is configured to operate in an autonomous driving mode. Lighter and darker colors may be chosen on different surfaces according to a thermal budget for a given sensor housing assembly, due to the different types of sensors arranged along particular surfaces, or to provide color contrast for different regions of the assembly. For instance, differing colors such as black/white or blue/white, and different finishes such as matte or glossy, may be selected to enhance certain attributes or to minimize issues associated with a sensor housing assembly.