Parking Aid Direction Detection for Low-Speed Maneuvers
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Solution Overview
Problem
Existing parking aid systems struggle to provide directionally relevant information at very low speeds due to wheel speed sensors' inability to discern the vehicle's direction of travel.
Innovation Solution
A control system that determines the vehicle's direction of travel using torque configuration signals or gear selection, independent of speed, to selectively output object locations to the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheel speed sensors are used to determine direction of travel, then direction information can be obtained at higher speeds, but the system fails to provide directional information at very low speeds during parking maneuvers
Solution Approach 1:
The patent introduces torque configuration signals and gear selection data as intermediary parameters to determine vehicle direction. These signals serve as mediators that provide directional information when wheel speed sensors fail at low speeds, bridging the gap in detection capability across the full speed range.
Solution Approach 2:
The control system is designed to perform multiple functions for direction determination: using wheel speed data at higher speeds, and switching to torque configuration/gear selection interpretation at very low speeds. This multi-functional approach ensures reliable direction detection across all operating conditions.
2Measurement precision
If the parking aid system uses wheel speed data to determine direction, then it can provide directional information at normal speeds, but it cannot discern direction at very low speeds typical of parking maneuvers
Solution Approach 1:
The system dynamically switches between different direction determination methods based on vehicle speed. At higher speeds, it uses wheel speed sensor data; at very low speeds during parking, it interprets torque configuration signals and gear selection. This dynamic adaptation maintains measurement precision across varying speed conditions.
Solution Approach 2:
The patent changes the parameter used for direction determination based on operating conditions. Instead of relying solely on wheel speed, the system transitions to using torque configuration parameters and gear selection data when vehicle speed falls below the reliable detection threshold, thereby maintaining adaptability across the full speed range.
3Loss of information
If the system selectively outputs object locations based on direction of travel, then directionally relevant information is provided to the driver, but this requires accurate direction determination which fails at low speeds
Solution Approach 1:
Torque configuration signals and gear selection data serve as intermediary indicators that enable the system to determine vehicle direction at low speeds. These intermediaries allow the selective output function to operate reliably during parking maneuvers by providing the necessary directional context that would otherwise be unavailable.
Solution Approach 2:
The system uses feedback from multiple sources (wheel speed sensors, torque configuration signals, gear selection data) to continuously determine vehicle direction. This multi-source feedback mechanism ensures that directional information is always available, enabling the selective output of relevant object locations regardless of vehicle speed.
Data Source
AI summary
There is provided a parking aid control system (110) and method (600) for a vehicle (200). The control system (110) is configured to generate a parking aid signal (135) for assisting a driver of the vehicle. The control system (110) is configured to receive an indication (145) of a gear selection made by a driver of the vehicle; receive, from a plurality of proximity sensors (120) associated with the vehicle, proximity data (125) indicative of a location of one or more objects in an environment of the vehicle; determine a direction of travel of the vehicle in dependence on the gear selection (145); and selectively output a parking aid signal (135) for outputting to a driver of the vehicle an indication of the location of at least some of the objects in dependence on the direction of travel of the vehicle.