Dynamic Radar Scanning Rate Control for Vehicle Sensors
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Solution Overview
Problem
Current center high-mounted stop lamps (CHMSL) systems do not efficiently manage energy consumption and zone coverage based on the number and proximity of objects, leading to suboptimal performance in varying environments.
Innovation Solution
A computer system that receives radar data to dynamically demarcate zones of coverage and adjust the scanning rate of radar sensors based on the distance and number of objects, turning on a camera only when necessary and maintaining energy efficiency by putting the system in a low-power state when no objects are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radar sensor operates at a high scanning rate to detect objects in all conditions, then detection reliability is improved, but energy consumption increases
Solution Approach 1:
The radar sensor's scanning rate is made dynamic rather than fixed. The system adjusts the scanning rate based on environmental conditions: operating at a first scanning rate when objects are detected and a second scanning rate when no objects are present, allowing the system to optimize between detection reliability and energy consumption depending on the situation
Solution Approach 2:
The system changes the operational parameters of the radar sensor based on detected conditions. By modifying the scanning rate parameter in response to object detection status, the system achieves adaptive performance that balances reliability requirements with energy efficiency
2Productivity
If the radar sensor operates continuously at a high scanning rate, then object detection capability is improved, but energy waste increases in low-occupancy areas
Solution Approach 1:
The system applies partial action by operating the radar sensor at different scanning rates based on need. When no objects are detected, the system reduces to a lower scanning rate, applying only the necessary level of monitoring rather than continuous maximum operation, thereby reducing energy waste while maintaining adequate detection capability
Solution Approach 2:
The radar sensor operates in periodic cycles with varying scanning rates. The system transitions between a first scanning rate during object presence and a second scanning rate during absence, creating a periodic adaptation pattern that reduces overall energy consumption while maintaining detection productivity when needed
3Measurement precision
If the system maintains high scanning rate in crowded conditions, then detection precision is improved, but energy consumption increases unnecessarily in empty areas
Solution Approach 1:
The system applies different operational qualities to different temporal states. When objects are detected, the radar operates with high scanning rate quality for precision; when no objects are present, it switches to low scanning rate quality for energy efficiency. This local adaptation of operational quality matches performance to actual environmental conditions
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 provides an energy-efficient way to monitor regions around the vehicle, dynamically adjusting scanning rates to conserve energy and ensure effective detection of objects, especially in low-occupancy areas, while maintaining visibility and safety in crowded conditions.
Implementation Method 1
receive radar data from a radar sensor of a vehicle
Data Source
AI summary
A computer includes a processor and a memory storing instructions executable by the processor to receive radar data from a radar sensor of a vehicle; demarcate a zone of coverage of the radar sensor, the zone of coverage having an area based on a number of objects indicated by the radar data; and after demarcating the zone of coverage, in response to detecting a newly present object in the zone of coverage, adjust a scanning rate of the radar sensor based on a distance of the newly present object from the radar sensor.