Radar Sensor System for Contactless Vehicle Door Control
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Solution Overview
Problem
Existing vehicle door movement systems require a radio key or wireless communication device for operation, and they consume excessive energy when detecting gestures, which can lead to battery drain and inefficient use of vehicle resources.
Innovation Solution
A radar sensor system with two operating modes is implemented, where the first mode detects movement with reduced energy consumption and switches to a second mode for high-resolution gesture detection only when a user is detected approaching the vehicle door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar sensor system operates permanently in the second operating mode for high-resolution gesture detection, then the gesture detection precision is improved, but the energy consumption increases substantially
Solution Approach 1:
The radar sensor system dynamically switches between two operating modes based on detected movement. The system transitions from a low-energy first operating mode to a high-precision second operating mode only when movement is detected, making the system's operational characteristics adaptive rather than static. This resolves the contradiction by allowing high precision only when needed while maintaining low energy consumption during normal operation.
Solution Approach 2:
The system employs periodic monitoring in the first operating mode to detect movement, then activates the energy-intensive second operating mode temporarily for gesture detection. This periodic activation rather than continuous operation allows the system to achieve high measurement precision when necessary while maintaining acceptable energy consumption levels through intermittent high-power operation.
2Difficulty of detecting and measuring
If the radar sensor system uses high-resolution detection for gesture recognition, then the gesture detection capability is improved, but the load on the vehicle's energy supply increases
Solution Approach 1:
The system dynamically adjusts its detection capability by switching between operating modes. The high-resolution detection capability is activated only when movement is detected, making the system's measurement capability adaptive to actual needs. This resolves the contradiction by enabling high gesture detection capability only when required rather than continuously, thereby reducing overall energy supply load.
Solution Approach 2:
The system performs preliminary movement detection in the low-power first operating mode before activating the high-power second operating mode for detailed gesture detection. This preliminary action allows the system to prepare for high-precision detection only when necessary, avoiding unnecessary energy consumption while maintaining the capability for high-resolution gesture recognition when needed.
3Speed
If the radar sensor system continuously monitors for gestures, then the responsiveness to user commands is improved, but the battery consumption increases
Solution Approach 1:
The system uses periodic monitoring in the first operating mode to detect movement, then activates the second operating mode temporarily for gesture detection. This periodic approach maintains responsiveness to user commands by quickly detecting movement and switching to high-resolution mode, while avoiding continuous high-power operation that would deplete the battery. The system achieves a balance between responsiveness and energy conservation through intermittent high-performance monitoring.
Solution Approach 2:
The system dynamically adjusts its monitoring intensity based on detected conditions. Rather than maintaining constant high-level monitoring, the system transitions from low-power periodic checks to high-power detailed detection only when movement is detected. This dynamic adjustment maintains responsiveness to actual user commands while significantly reducing overall battery consumption compared to continuous high-level monitoring.
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 solution enables contactless movement of vehicle doors without the need for a radio key, while significantly reducing energy consumption by limiting high-energy gesture detection to only when a user is present and approaching the vehicle door.
Implementation Method 1
The radar sensor system (3) is designed to detect a movement of an object in a detection area in a surrounding area of the vehicle door
Implementation Method 2
a gesture detection is performed in the second operating mode
Data Source
AI summary
A system for providing contactless movement of a vehicle door relative to a vehicle body including an electric-motor movement device for moving the vehicle door, a radar sensor system for detecting, in the region of the vehicle door, a gesture to be performed by a user, and a control device for controlling the movement device according to a detection by the radar sensor system. The radar sensor system is configured to detect, in a first operating mode, a movement in a detection region in an environment of the vehicle door and to detect, in a second operating mode, a gesture for moving the vehicle door, the radar sensor system being configured to switch to the second operating mode when a movement is detected in the first operating mode.