Radar Sensor Operating Mode Switching for Energy Efficiency
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Solution Overview
Problem
Existing radar sensor systems for motor vehicles face challenges in achieving high detection accuracy while minimizing energy consumption, particularly in varying operating conditions and user behaviors.
Innovation Solution
A detection device with a control circuit that switches the radar sensor between different operating modes based on forecast data, optimizing energy usage by reducing measurement frequency or range when low energy consumption is expected, and increasing energy usage for high detection accuracy when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar sensor is operated with high measurement frequency and full detection range, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The radar sensor operates in multiple dynamic modes (first operating mode with high measurement frequency and full range, second operating mode with reduced frequency and range) that can be switched based on forecast data. This dynamic adaptation allows the system to optimize between detection accuracy and energy consumption by selecting the appropriate mode according to predicted operator action probabilities.
Solution Approach 2:
The system changes operating parameters (measurement frequency, detection range) of the radar sensor based on forecast data. When operator actions are unlikely, parameters are reduced to lower energy consumption. When actions are predicted, parameters are increased to ensure high detection accuracy, thus resolving the contradiction between continuous high performance and energy efficiency.
2Use of energy by moving object
If the radar sensor is completely switched off or operated in standby mode, then energy consumption is reduced, but detection accuracy and response time deteriorate
Solution Approach 1:
The system uses forecast data to predict operator actions in advance. When an action is predicted, the radar sensor is activated or switched to high-performance mode before the actual action occurs. This preliminary action ensures that the system maintains high detection accuracy when needed while avoiding continuous operation, thus reducing energy consumption without sacrificing detection capability.
3Reliability
If the radar sensor operates continuously in high-performance mode, then detection reliability is improved, but overall energy requirement increases
Solution Approach 1:
The system uses forecast data as feedback to dynamically adjust radar sensor operation. The control circuit continuously evaluates predicted operator action probabilities and adjusts the operating mode accordingly. This feedback mechanism ensures the radar operates at high performance levels only when operator actions are predicted, maintaining detection reliability while significantly reducing overall energy requirements compared to continuous high-performance operation.
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 enables high detection accuracy while significantly reducing energy consumption, adapting to different operating conditions and user behaviors by dynamically adjusting the radar sensor's operating modes based on forecast data.
Implementation Method 1
Radar sensors enable the distance of objects to the sensor to be measured, and the relative speed of objects to the radar sensor can also be recorded. For detection, the radar sensor emits radiation in the form of a beam or radar beam and detects the reflected radiation.
Data Source
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AI summary
A detection device (20) for operating actions on motor vehicles consists of at least one radar sensor (22) and a control circuit (21) connected to the radar sensor (22). The control circuit (21) controls the radar sensor (22) and processes its signals. The control circuit (21) operates the radar sensor (22) in at least two different operating modes, wherein the energy requirement is higher in the first mode than in the second mode. Forecast data is created or received from external data sources (30) containing time-related information about expected operating actions. This data is stored in a memory (24) of the control circuit (21). The operating mode is then selected depending on the forecast data stored in the memory (24), thereby saving energy and optimizing functionality.