Vehicle Radar Sensor Activation via Mobile Device Detection
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Solution Overview
Problem
Existing driver assistance systems are limited in their ability to provide precise support to individuals outside a motor vehicle when it is not in operation, due to the high energy requirements of modern environmental sensors like radar sensors, which often shut down when the vehicle is turned off, resulting in inaccurate position determination and limited functionality.
Innovation Solution
The method involves briefly activating radar sensors using a detected mobile device, such as a smartphone, to gather precise position and movement information, utilizing semiconductor-based radar sensors with high-resolution capabilities, and integrating these sensors with a control unit and digital signal processing to provide enhanced support features like gesture recognition and automated actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar sensors are activated continuously to provide precise position determination and support functions, then measurement precision and support quality improve, but energy consumption increases significantly
Solution Approach 1:
The radar sensor is activated periodically based on trigger events rather than continuously. When a mobile device enters the communication area, the radar sensor is activated temporarily to gather position and movement data, then deactivated after a predetermined time period. This periodic activation maintains measurement precision when needed while dramatically reducing overall energy consumption.
2Use of energy by moving object
If radar sensors are deactivated when the vehicle is off to save energy, then energy consumption decreases, but the ability to support persons outside the vehicle is lost
Solution Approach 1:
The system performs preliminary detection using a low-power communication device to detect when a mobile device enters the communication area. This preliminary action triggers the activation of the radar sensor, ensuring that the higher-power sensor is only activated when actually needed, thus maintaining support function availability while minimizing energy consumption.
3Device complexity
If wireless keys and transponders are used for detecting persons outside the vehicle, then device complexity is reduced, but measurement precision and reliability of position determination deteriorate
Solution Approach 1:
The system merges the advantages of both approaches by combining the low-power detection capability of wireless communication devices with the high-precision measurement capability of radar sensors. The communication device detects the presence of mobile devices and triggers the radar sensor, which then provides precise position and movement information, achieving both simplicity and precision.
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 enables more accurate and reliable support for individuals outside the vehicle, allowing for precise monitoring and activation of features like lighting and door opening, even when the vehicle is off, without the need for additional transponders, and ensures energy efficiency by deactivating sensors after a predetermined period.
Implementation Method 1
the motor vehicle having at least one radar sensor
Data Source
Figure 1~2
Figure 3
AI summary
Method for operating a driver assistance system (16) to support at least one person (19, 22) outside a motor vehicle (1) by controlling at least one vehicle system to carry out at least one action, wherein the motor vehicle (1) has at least one radar sensor (2), wherein, upon detection of a predetermined mobile device (20) associated with the motor vehicle (1) in a communication area (18) of the motor vehicle (1), the at least one radar sensor (2) is activated by a communication device (17) of the motor vehicle (1), after which, by evaluating the radar data, at least one evaluation data comprising position information for at least one person (19, 22) in the vicinity of the motor vehicle (1) is determined, wherein, upon fulfillment of an action criterion evaluating the evaluation data, at least one action associated with the action criterion to support the person (19, 22) is executed.