Vehicle Radar Sensor for Contamination-Resistant Gesture Activation
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Solution Overview
Problem
Existing sensor devices for vehicle movable parts, such as doors and side mirrors, face challenges with capacitive field distortion due to contamination and require complex control systems, limiting their functionality and reliability.
Innovation Solution
A sensor device using electromagnetic waves in the radio frequency range (radar waves) to detect activation actions, allowing for improved functionality, resistance to environmental influences, and simplified control, integrated as a modular unit that can be attached to vehicle components like door handles or side mirrors, and communicates with existing vehicle systems for enhanced operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If capacitive sensors are used to detect activation actions, then contactless operation is enabled, but the capacitive field is easily distorted by contamination and complex control systems are required
Solution Approach 1:
The patent replaces capacitive sensing with radar-based electromagnetic wave detection. The sensor unit uses radar waves to detect activation actions (hand approaches, gestures) without contact, eliminating the contamination vulnerability of capacitive fields while maintaining contactless operation. This substitution of sensing physics resolves the contradiction between ease of contactless operation and reliability against contamination.
2Ease of operation
If capacitive sensors are used for detecting activation actions, then contactless operation is achieved, but the control system becomes complex
Solution Approach 1:
The patent substitutes capacitive sensing with radar-based detection, which inherently provides more robust signal characteristics for activation detection. The radar system detects hand approaches and gestures through electromagnetic wave reflections, providing clearer detection signals that simplify the control logic compared to capacitive field interpretation, thereby reducing overall system complexity while maintaining contactless operation.
3Adaptability or versatility
If a sensor device is integrated into a door handle or side mirror, then functionality is extended to movable parts, but the device must be compact and adaptable to different locations
Solution Approach 1:
The patent designs the sensor device as a universal module that can be integrated into multiple vehicle components (door handles, side mirrors, B-pillars) through standardized mounting. The radar-based sensor unit provides consistent activation detection functionality across different locations and movable parts, eliminating the need for location-specific sensor designs and reducing integration complexity through multi-functionality.
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 radar-based sensor device provides safe, reliable, and convenient operation of vehicle movable parts, integrating with assistance systems for enhanced functionality and ease of assembly, while being resistant to environmental interference.
Implementation Method 1
the sensor unit is configured to detect the at least one activation action by the user using electromagnetic waves in the radio frequency range (radar waves)
Data Source
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AI summary
The invention relates to a sensor device (10) for a vehicle (100), comprising: a control unit (11) for actuating a movable part (101), in particular a door (101) or a side mirror (103), of the vehicle (100), and a sensor unit (12) for monitoring at least one first activation area (A1), wherein the control unit (11) is configured to actuate the movable part (101) of the vehicle (100) when at least one activation action (H1, H2, B1, B2) of a user in the first activation area (A1) has been detected by the sensor unit (12). According to the invention, the sensor unit (12) is configured to detect the at least one activation action (H1, H2, B1, B2) of the user using electromagnetic waves in the radio frequency range.