Cabin Radar Gesture Sensing for Noise-Free Vehicle Window Control
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Solution Overview
Problem
Conventional user interface and sensing technologies in vehicles are complex, weighty, and inefficient due to numerous buttons and switches, and speech recognition systems are hindered by cabin noise, requiring multiple components and complicated control methodologies.
Innovation Solution
A radar assembly with multifunction sensing functionality that uses radar transmit and receive antennas, a timing controller, and a microcontroller to detect motion and gestures in hotspot zones, replacing traditional interfaces by correlating gestures with vehicle control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple buttons and switches are used for vehicle control, then ease of operation is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines multiple separate control functions (window control, mirror adjustment, lock control) into a single capacitive touch sensor assembly located on the door armrest. This single assembly replaces what would traditionally require multiple separate buttons and switches, thereby reducing device complexity while maintaining ease of operation through intuitive touch interfaces.
Solution Approach 2:
The capacitive touch sensor assembly serves multiple functions simultaneously - it detects touches for window control, mirror adjustment, and lock control all in one location. This multi-functional design eliminates the need for separate control mechanisms for each function, reducing overall system complexity while preserving operational ease.
2Ease of operation
If speech recognition systems are used for vehicle control, then ease of operation is improved, but reliability deteriorates due to cabin noise
Solution Approach 1:
The patent introduces capacitive touch sensors as an intermediary control mechanism that bridges the gap between voice control and traditional physical buttons. These sensors detect touch gestures and can be integrated with existing voice recognition systems, providing a more reliable control method that is not affected by cabin noise while maintaining ease of operation through natural touch interactions.
3Ease of operation
If traditional button and switch systems are used, then ease of operation is improved, but weight increases
Solution Approach 1:
The patent replaces mechanical buttons and switches with capacitive touch sensors that detect touch through electrical field changes rather than mechanical contact. This substitution eliminates the need for heavy mechanical components, reducing weight while maintaining ease of operation through intuitive touch-based control interfaces.
4Ease of operation
If multiple sensing technologies are integrated, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple sensing capabilities (capacitive touch detection, proximity sensing, and gesture recognition) into a single integrated sensor assembly. This consolidation allows the system to provide diverse control options (touch, hover, gesture) without requiring separate sensor systems, thereby improving ease of operation while managing device complexity through integration.
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 assembly integrates multiple interfaces into a single unit, enhancing gesture recognition resolution and reducing cabin complexity, effectively operating vehicle controls through motion and gesture recognition, even in noisy environments.
Implementation Method 1
at least one radar transmit antenna for transmitting radar waves in a cabin of the vehicle and exterior areas outside the cabin
Implementation Method 2
receiving the radar waves in the cabin of the vehicle after reflection from at least one of the exterior areas and the cabin and passengers in the vehicle
Data Source
AI summary
A vehicular cabin monitoring system includes a radar assembly disposed in a cabin of a vehicle and operable to capture radar data. The radar assembly includes at least one radar transmit antenna that is operable to transmit radar waves and at least one radar receive antenna that is operable to receive radar waves. The transmitted radar waves are transmitted at least to a hotspot zone in the cabin of the vehicle. A data processor is operable to process radar data captured by the radar assembly. The vehicular cabin monitoring system, via processing at the data processor of radar data captured by the radar assembly, determines presence within the hotspot zone of a body part of an occupant present in the cabin of the vehicle. At least in part responsive to determining presence within the hotspot zone of the body part of the occupant, a window of the vehicle is opened.