Rear Object Recognition Under Towing-Induced Multipath Interference
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Solution Overview
Problem
Existing object recognition systems in vehicles struggle to accurately detect objects behind the vehicle when a towed vehicle is present, due to the generation of multipath waves that interfere with the range sensor's ability to correctly recognize objects.
Innovation Solution
An object recognition device equipped with a tow determining unit and a changing unit that adjusts the range sensor's detection method to suppress multipath waves by reducing transmission power and changing the detection area when a towed vehicle is detected, thereby preventing the reception of unnecessary reflected waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the range sensor transmits probe waves to detect objects behind the vehicle, then object detection capability is improved, but multipath waves are generated that cause false recognition when a towed vehicle is present
Solution Approach 1:
The patent applies dynamics by making the detection parameters changeable based on the towing state. The control unit dynamically adjusts transmission power and detection area settings when a towed vehicle is detected, switching between different detection modes to optimize performance and eliminate multipath wave interference.
Solution Approach 2:
The patent implements parameter changes by modifying transmission power levels and detection area boundaries according to the towing condition. When towing is detected, the system changes these parameters to suppress multipath wave reception, thereby resolving the contradiction between detection capability and interference prevention.
2Area of stationary object
If the range sensor operates with high transmission power to improve detection range, then detection capability is enhanced, but the impact of multipath waves from towed vehicles increases
Solution Approach 1:
The system dynamically adjusts transmission power based on the towing state. When a towed vehicle is detected, the control unit reduces transmission power to minimize multipath wave generation while maintaining adequate detection capability for the current situation.
Solution Approach 2:
The patent changes the transmission power parameter according to the towing condition. By lowering transmission power when towing is present, the system reduces the intensity of reflected waves from the towed vehicle, thereby suppressing multipath wave interference while preserving necessary detection range.
3Area of stationary object
If the detection area is expanded to cover all areas behind the vehicle, then object detection coverage is improved, but reception of reflected waves from towed vehicles increases
Solution Approach 1:
The detection area is dynamically adjusted based on the towing state. When a towed vehicle is detected, the control unit modifies the detection area boundaries to exclude or reduce coverage of regions where multipath waves from the towed vehicle would be received, thereby maintaining detection coverage while suppressing interference.
Solution Approach 2:
The patent changes the detection area parameter according to the towing condition. By adjusting the spatial boundaries of the detection area, the system prevents reception of reflected waves from the towed vehicle while maintaining adequate coverage for detecting relevant objects behind the vehicle.
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 solution allows for accurate recognition of objects behind the vehicle even when a towed vehicle is present, by reducing the impact of multipath waves and preventing false object recognition.
Implementation Method 1
a range sensor that transmits a probe wave and receives a reflected wave of the probe wave
Data Source
AI summary
An object recognition device is applied to a vehicle having a range sensor that transmits a probe wave and receives the reflected wave of the probe wave. The object recognition device is configured to recognize an object behind the own vehicle based on detection information of the range sensor. The object recognition device includes a tow determining unit configured to determine whether a towed vehicle is coupled to a rear of the own vehicle, and a changing unit configured to, in response to determining that the towed vehicle is coupled to the rear of the own vehicle, change how the range sensor detects an object to suppress reception of the reflected wave caused by presence of the towed vehicle.