Radar Sensor Switching Control for Health Risk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current radar sensors in motor vehicles have limited switch-on time optimization, leading to potential health risks due to prolonged use, and existing solutions fail to balance comfort and safety in varying driving conditions.
Innovation Solution
A control unit in a motor vehicle cyclically determines and stores status data to dynamically manage the switching state of the radar sensor, minimizing its switch-on times by setting conditions based on factors like brake activation, driver assistance system status, and vehicle speed, ensuring the radar sensor is only active when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radar sensor is kept active continuously to ensure safety and comfort in all driving situations, then the safety and comfort are maintained, but the health risks due to prolonged exposure to radar radiation increase
Solution Approach 1:
The patent applies dynamics by making the radar sensor's operational state variable rather than fixed. The control unit dynamically adjusts the switching state between active and inactive based on real-time evaluation of multiple status data parameters including vehicle speed, driver assistance system activation, brake status, and engine operation. This dynamic adaptation allows the system to maintain safety when needed while minimizing radiation exposure during low-risk conditions.
Solution Approach 2:
The patent changes the operational parameters of the radar sensor by switching between different states (active/inactive) based on evaluated conditions. The control unit monitors multiple parameters (vehicle speed, brake activation, driver assistance system status) and adjusts the radar sensor's transmission state accordingly, thereby changing the radiation exposure parameter while maintaining safety through conditional monitoring.
2Object-affected harmful factors
If the radar sensor is deactivated during stationary periods to reduce health risks, then the health risks are reduced, but the ability to detect obstacles and ensure safety when stationary is compromised
Solution Approach 1:
The system dynamically determines the radar sensor's operational state based on real-time vehicle status. When the vehicle is stationary, the control unit evaluates multiple conditions (driver assistance system activation, brake status, engine operation) to decide whether to keep the radar active or inactive, allowing flexible adaptation to different stationary scenarios rather than a fixed deactivation rule.
Solution Approach 2:
The control unit continuously monitors status data from various vehicle systems and uses this feedback to adjust the radar sensor's operational state. The system receives feedback about vehicle speed, brake activation, driver assistance system status, and engine operation, then adjusts radar transmission accordingly, creating a closed-loop control system that responds to changing conditions.
3Measurement precision
If the radar sensor is operated at high speeds to maintain detection accuracy, then the detection accuracy is maintained, but the unnecessary radiation exposure increases
Solution Approach 1:
The patent changes the operational parameter of the radar sensor (active/inactive state) based on the vehicle speed parameter and other conditions. The control unit evaluates whether high-speed operation requires continuous radar monitoring for accurate obstacle detection, and only maintains active transmission when necessary, thereby reducing radiation exposure during low-risk high-speed scenarios while preserving detection accuracy when needed.
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 minimizes the switch-on time of the radar sensor without compromising safety or comfort, reducing exposure to potential health risks and improving operational efficiency.
Implementation Method 1
the radar sensor emits signals which are in the so-called microwave frequency range and which are reflected by the objects located in the beam range of the radar sensor
Implementation Method 2
The relative speed and distance of an object to the vehicle carrying the radar sensor is determined using the so-called Doppler effect, ie the frequency shift between the transmitted and the received signal
Data Source
Figure 1
Figure 2
AI summary
A motor vehicle, in particular a commercial vehicle, with a control unit, wherein at least one driver assistance system is implemented programmatically on the control unit (5), wherein this driver assistance system uses distance and/or speed data from a radar sensor (3), which the control unit (5) receives from the radar sensor (3) connected to it, and wherein the control unit (5) uses the vehicle's own speed (1) to change the switching state of the radar sensor (3). To minimize the activation times of at least the transmitter unit of the radar sensor (3), the control unit (5) is provided to cyclically acquire and store further state data of the vehicle via sensors connected to it. With regard to the state data, conditions are specified in the control unit under which the switching state "radar sensor active" or "radar sensor inactive" is maintained or established.For this purpose, in a first routine (11) the state data are determined and stored cyclically, and in a second routine (12) it is checked which of the specified conditions are present and then the corresponding switching state of the radar sensor (3) is maintained or established, whereby the radar sensor does not emit radar beams in the switching state "inactive".