Vertical Parking Reference-Line Correction for Ultrasonic Spot Errors
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Solution Overview
Problem
Existing automatic parking technologies using ultrasonic sensors often result in large estimation errors for parking spot positions due to the dependence on acoustic wave propagation, leading to reduced success rates in complex environments.
Innovation Solution
A vertical parking method that involves detecting initial parking spot coordinates, defining a starting reference line, and using ultrasonic sensors to calculate and adjust the target parking spot coordinates by determining the obstacle's position and translating the parking spot to avoid obstacles, ensuring accurate parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ultrasonic sensors are used for detecting parking spots, then the system is economical and practical with multiple functions, but large estimation errors of parking spot positions are produced
Solution Approach 1:
The patent introduces a reference vehicle as an intermediary object to establish a reference parking spot position. By using the reference vehicle's known position and dimensions, the system creates a reliable reference frame that mediates between the ultrasonic sensor detections and the actual parking spot location, thereby improving position estimation accuracy without abandoning cost-effective ultrasonic sensors
Solution Approach 2:
The patent implements feedback by continuously monitoring the distance between the vehicle and the reference vehicle during the parking process. The system uses this distance information to dynamically adjust the target parking spot position, ensuring accurate parking despite initial estimation errors from ultrasonic sensors
2Extent of automation
If ultrasonic waves are used for searching parking spots, then the system can operate automatically, but the success rate of parking into spots under complex working conditions is greatly reduced
Solution Approach 1:
The patent performs preliminary action by first detecting the reference vehicle and establishing a reference parking spot position before the actual parking maneuver. This preliminary step creates a reliable target position that accounts for complex environmental conditions, thereby improving the reliability of the subsequent automatic parking execution
Solution Approach 2:
The patent applies dynamics by making the target parking spot position adjustable and adaptive. Instead of using a fixed initial detection position, the system dynamically adjusts the target position based on real-time distance measurements between the vehicle and reference vehicle, enabling successful parking under varying complex conditions
3Device complexity
If the initial parking spot position is used directly for parking, then the process is simple, but parking spot estimation errors cause obstructed passenger access and braking interruptions
Solution Approach 1:
The patent replaces the simple but inaccurate direct positioning approach with a calculation-based system. Instead of directly using the initial ultrasonic detection position, the system calculates the target parking spot position using distance measurements and geometric relationships, substituting mechanical simplicity with computational precision to eliminate positioning errors
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 method significantly reduces parking spot estimation errors and increases the accuracy of vehicle parking, preventing issues like obstructed passenger access and vehicle braking interruptions.
Implementation Method 1
employ ultrasonic waves for automatically searching parking spots
Data Source
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AI summary
The present invention discloses a vertical parking method which comprises the steps of: step 1, locating an obstacle when coordinate information of a preset position, close to a first vehicle corner, of a vehicle is located in a starting reference line or on one side, close to an initial vertical parking spot, of the starting reference line, and ultrasonic sensors at the first vehicle corner detect the obstacle, and then executing step 2; step 2, calculating coordinate information of a point O at which the obstacle is most possibly in contact to the vehicle, and calculating coordinate information of an outer boundary of a target vertical parking spot according to the point O, the first vehicle corner and the coordinate information of the outer boundary of the initial vertical parking spot; and step 3, conducting automatic or semi-automatic parking according to the coordinate information of the outer boundary of the target vertical parking spot. The vertical parking method of the present invention may eliminate an estimation error of an original parking spot and increase the accuracy rate that the vehicle is parked into the parking spot.