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A semi-automated parallel parking system for passenger cars
Volvo Car Corporation, Gothenburg, Sweden.
Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
2006 (English)In: Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, ISSN 0954-4070, E-ISSN 2041-2991, Vol. 220, no 1, 53-65 p.Article in journal (Refereed) Published
Abstract [en]

Car parking has been, and still is, a growing problem, with increasing vehicle sizes in the luxury segment as well as sport-utility vehicles. This is especially true when bearing in mind the confined parking spaces in parking lots and cities. While damage during parking generally does not cause any injury to the passengers, it is costly and annoying. Park assist systems are by no means new on the market, since passive systems which provide longitudinal guidance using ultrasonic distance sensors have been available on the market for a number of years.

The system presented is a semi-automated approach to parallel parking problems, as they frequently occur in European and Asian cities. The challenge during the development of this system was to have as few components as possible added to a standard vehicle, seeking reuse of many of the already built-in functionalities. The result is a system that leaves the longitudinal control of the vehicle to the driver but automates the steering process, and even stops the vehicle when the final parking position is reached.

Place, publisher, year, edition, pages
2006. Vol. 220, no 1, 53-65 p.
Keyword [en]
electric steering gear, ultrasonic distance sensors, functional architecture
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-36019DOI: 10.1243/095440705X69650ISI: 000234903900005Local ID: 29425OAI: oai:DiVA.org:liu-36019DiVA: diva2:256867
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13
In thesis
1. Automatic parallel parking: park assist systems for passenger vehicles
Open this publication in new window or tab >>Automatic parallel parking: park assist systems for passenger vehicles
2007 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis discusses how the problem of parking a passenger car can be solved. There ane numerous obstacles when creating a fully or semi automated system for assisting the parking maneuver. The obstacles range from unobtrusive Man Machine Interface issues to robust algorithms for finding features in sensor data.

Such a system will also have to cope with ever changing environments, most of which will not be discovered during the design phase. Misuse will also be common, since the function is aimed at a mass market - the car buyers. These interesting problem areas is also coupled with the customer value. A car buying customer today aims at feature content and comfort. So for a parking system to survive it needs to be extremely intuitive; the customer value must be discovered during a short test drive with the vehicle. A learning period before the user can operate the system is not feasible.

The work presented here proposes an interesting algorithm for finding parking space features in sensor data collected using ultrasonics. The algorithm, which is based on the well known Hough transform have been proved to be robust in real world experiments.

Furthermore it is also investigated how critical the mount ing of the environment sensing subsystem is. Where should the sensors be placed and where should they be facing to maximize the performance.

Emphasis have also been put on designing a functional architecture that fits in the car development process of today. The implementation of a system in a car must fit in the platform and component reuse is critical to keep cost down.

To test theories developed during the work a prototype car has been used. The prototype is essential to analyze the robustness of algorithms in different parking scenarios. It has also been an invaluable tool when conducting customer surveys to find where the customer value of these kind of systems is.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2007. 42 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1287
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-41269 (URN)55422 (Local ID)91-85643-14-9 (ISBN)55422 (Archive number)55422 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-12-12

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Pohl, JochenSethson, MagnusDegerman, PärLarsson, Jonas

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Pohl, JochenSethson, MagnusDegerman, PärLarsson, Jonas
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Fluid and Mechanical Engineering SystemsThe Institute of Technology
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Engineering and Technology

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