Transparent Sensor Deflector for Water and Debris Interference
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Solution Overview
Problem
Existing autonomous vehicle systems face interference from water and debris when collecting data, which can impact the accuracy of object detection sensors, particularly at higher speeds.
Innovation Solution
A sensor assembly with a movable deflector made of transparent material that extends from the housing to deflect air and debris away from the sensor, using an actuator controlled by a computer to deploy and stow the deflector based on vehicle speed, ensuring an unobstructed field of view and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is exposed to the ambient environment for data collection, then the sensor can detect objects surrounding the vehicle, but water and debris interfere with sensor data collection especially at higher speeds
Solution Approach 1:
A deflector made of transparent material is positioned between the sensor and the incoming water/debris flow. The deflector acts as an intermediary element that redirects harmful factors away from the sensor while allowing light to pass through for detection. The deflector is mounted on the housing and extends into the path of oncoming elements, creating a protective barrier without blocking the sensor's field of view.
Solution Approach 2:
The deflector is made movable between a deployed position (extending outward to deflect elements) and a stowed position (retracted to minimize obstruction). This dynamic positioning allows the system to adapt to different operating conditions - deploying the deflector when high-speed operation is expected and stowing it when not needed, thus optimizing both protection and detection capabilities.
2Reliability
If a deflector is added to protect the sensor from water and debris, then sensor accuracy is improved, but the device complexity increases
Solution Approach 1:
The deflector serves multiple functions: it deflects water and debris away from the sensor, yet its transparent material allows light to pass through for detection. The same component provides both protection and maintains optical access, eliminating the need for separate protective structures that would block the sensor's view. This multi-functionality reduces overall system complexity despite adding the deflector element.
3Area of stationary object
If the deflector is made of transparent material to maintain field of view, then light can pass through for detection, but the structural strength may be reduced
Solution Approach 1:
The deflector is constructed from transparent material that provides both optical transmission and structural integrity. This material allows light to pass through for sensor detection while maintaining sufficient strength to withstand aerodynamic forces and physical impacts from debris. The composite or specialized material properties enable simultaneous achievement of transparency and durability requirements.
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
The solution effectively reduces the impact of water and debris on sensor data collection, enhancing the accuracy and reliability of autonomous vehicle operations by maintaining a clear field of view for the sensors, especially at higher speeds.
Implementation Method 1
The deflector includes transparent material that permits light to pass through the deflector
Implementation Method 2
A sensor assembly with a movable deflector made of transparent material that extends from the housing to deflect air and debris away from the sensor
Data Source
AI summary
An assembly includes a housing and a sensor supported by the housing. The assembly includes a deflector supported by the housing forward of the sensor. The deflector and the sensor define a spacing therebetween. The spacing is open to an ambient environment external of the housing. The deflector includes transparent material that permits light to pass through the deflector.