Parking Assistance Learning Mode for Obstructed Sensor Detection
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Solution Overview
Problem
Existing driver assistance systems for parking cannot reliably guide a vehicle into a frequently used parking space, such as a garage, from any starting position, especially when obstacles obstruct sensor detection, and require recalculating parking trajectories each time, leading to inconsistent and potentially erratic parking.
Innovation Solution
A driver assistance device with a learning mode that records reference data about the parking space, including its surroundings and target position, and an operating mode that compares current sensor data to define a reliable parking path, allowing autonomous parking even if the space cannot be detected by the sensor, by using ultrasonic sensors, cameras, and image processing to recognize reference features and determine the vehicle's position relative to the target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driver assistance system recalculates parking trajectory each time from current position, then it can adapt to different starting positions, but the parking path becomes inconsistent and potentially erratic
Solution Approach 1:
The system performs preliminary recording of reference data during a learning phase, storing information about the parking space location, surrounding area, and reference target position. This pre-acquired data serves as a reliable baseline for subsequent automatic parking operations, eliminating the need to recalculate trajectories from scratch each time.
Solution Approach 2:
The system creates a copy of the reference environment data and reference target position information, storing it in memory for future use. During automatic parking, the system compares current sensor data with this stored reference copy to determine the vehicle's position and define the parking lane, ensuring consistent and reliable parking paths.
2Measurement precision
If the system uses sensor detection to identify parking space, then it can accurately determine position, but obstacles may obstruct sensor detection and prevent reliable parking
Solution Approach 1:
The system performs preliminary recording of reference data during a learning phase when the parking space is accessible, storing information about the parking space location, surrounding area, and reference target position. This pre-acquired reference data serves as a backup when sensor detection is obstructed during actual parking operations.
Solution Approach 2:
The system uses reference data about the surrounding area as an intermediary to indirectly determine the vehicle's position relative to the parking space. Instead of directly detecting the parking space (which may be obstructed), the system detects reference features in the surrounding area and uses the stored reference data to calculate the vehicle's position and define the parking lane.
3Reliability
If the system requires the vehicle to be on a recorded route for automatic parking, then it can guide the vehicle back to starting point, but automatic parking from any starting position is not possible
Solution Approach 1:
The system defines a parking lane that can accommodate various starting positions along the desired route, rather than requiring the vehicle to be at a specific recorded starting point. The parking lane is defined as a region with lateral boundaries that extends along the route, allowing the vehicle to initiate automatic parking from any position within this region.
Solution Approach 2:
The system transitions from point-based positioning (specific starting point) to region-based positioning (parking lane with lateral boundaries). By defining a lateral extent for the parking lane, the system adds a dimensional aspect that allows flexibility in the longitudinal position while maintaining reliable route guidance.
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
Enables reliable and efficient autonomous parking in frequently used spaces by defining a parking path from any starting position, ensuring collision-free and visually appealing parking, even when the parking space is not directly detectable by the sensor, by using stored reference data and real-time sensor information to guide the vehicle into a known and reliable path.
Implementation Method 1
using ultrasonic sensors, cameras, and image processing to recognize reference features
Implementation Method 2
using ultrasonic sensors, cameras, and image processing to recognize reference features
Data Source
Figure 1
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Figure 4~6
AI summary
The invention relates to a method for assisting a driver of a motor vehicle (1) when parking in a parking space (19), in particular in a garage (18), using a driver assistance device (2) of the motor vehicle (1), wherein: - in a learning mode of the driver assistance device (2), reference data relating to an area (22) surrounding the parking space (19) are sensed by means of a sensor device (7) of the driver assistance device (2) and are stored, while the motor vehicle (1) is being parked in the parking space (19) and steered by the driver, - a reference target position (27), which is reached by the motor vehicle (1) in the learning mode, is sensed by the driver assistance device (2), and data with information about this reference target position (27) are stored, - in a subsequent operating mode of the driver assistance device (2) which is different from the learning mode, sensor data are sensed by the sensor device (7) and compared with the reference data, wherein as a function of this comparison the area (22) surrounding the parking space (19) is detected on the basis of the acquired sensor data and as a result a current position (28, 33) of the motor vehicle (1) relative to the reference target position (27) is determined and, - as a function of the current position (28, 33) of the motor vehicle (1) relative to the reference target position (27) a parking path (29, 32, 36) is defined by the driver assistance device (2), along which parking path (29, 32, 36) the motor vehicle (1) is moved out of the current position (28, 33) and parked in the parking space (19). The invention also relates to a driver assistance device (2) for carrying out the method.