Vehicle Door Radar Sensor Placement for Object Detection
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Solution Overview
Problem
Current vehicle safety systems lack effective, independent, and adaptive methods to detect and respond to objects outside the vehicle across varying environmental conditions, particularly in determining the presence and approach of objects near doors and side-view mirrors.
Innovation Solution
A system comprising multiple millimeter-wave radar sensors coupled to vehicle doors and side-view mirrors, along with a processing circuit and controller, generates and processes radar data to determine the presence and approach of objects, enabling adaptive control of vehicle operations such as door locking, airbag deployment, and emergency alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple millimeter-wave radar sensors are deployed at different vehicle locations, then object detection coverage and safety are improved, but device complexity increases
Solution Approach 1:
The system divides the vehicle's external environment into multiple detection zones by placing radar sensors at different locations (doors, side-view mirrors). Each sensor independently monitors its specific zone, providing comprehensive coverage while maintaining manageable system complexity through modular deployment
Solution Approach 2:
Multiple millimeter-wave radar sensors perform the same detection function across different vehicle locations. Each sensor is universally capable of detecting objects in its field of view, and the system can adaptively use any sensor based on operational conditions, providing flexibility without requiring different sensor types for different functions
2Reliability
If radar sensors are positioned at multiple vehicle locations with different fields of view, then object detection coverage is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The processing circuit continuously receives radar data from multiple sensors and dynamically determines whether objects are approaching specific vehicle areas. The system uses feedback from each sensor's field of view to update the overall detection state, adapting to changing environmental conditions and object positions in real-time
3Reliability
If millimeter-wave radar sensors are used instead of other sensing methods, then detection capability under varying environmental conditions is improved, but use of energy increases
Solution Approach 1:
The controller adaptively controls the operation of millimeter-wave radar sensors based on vehicle state and environmental conditions. Sensors are activated or deactivated dynamically to balance detection reliability with energy conservation, adjusting operational parameters to match actual safety needs rather than running at constant power
Solution Approach 2:
The system changes operational parameters of the radar sensors based on detection needs and environmental conditions. By adjusting transmission power, detection thresholds, and active sensor selection, the system optimizes the balance between detection performance and energy consumption across different operating scenarios
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 system provides enhanced vehicle safety by independently detecting objects outside the vehicle, alerting occupants, and intervening to prevent harm, regardless of lighting or environmental conditions, with long-range detection capabilities to facilitate timely alerts and interventions.
Implementation Method 1
the distance between the radar and a target is determined by transmitting a frequency modulated signal, receiving a reflection of the frequency modulated signal, and determining a distance based on a time delay and/or frequency difference between the transmission and reception of the frequency modulated signal
Data Source
AI summary
An embodiment system may include a first millimeter-wave radar sensor coupled to a driver-side door of a vehicle, and a second millimeter-wave radar sensor coupled to a side-view mirror of the vehicle adjacent to the driver-side door. The first millimeter-wave radar sensor may be configured to produce a first set of radar data indicative of a presence of an object within a first field of view, and the second millimeter-wave radar sensor may be configured to produce a second set of radar data indicative of a presence of the object within a second field of view. The system may further include a processing circuit coupled to the first millimeter-wave radar sensor and the second millimeter-wave radar sensor, and a controller coupled to the processing circuit, the controller being configured to control an operation of the vehicle based on a control signal provided to the controller by the processing circuit.