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State of the art; Automatisk sprickmätning av vägbanor
Swedish National Road and Transport Research Institute.ORCID iD: 000-0002-2397-0769
2002 (Swedish)Report (Other (popular science, discussion, etc.))
Abstract [sv]

The need for objective collection of crack information has increased in


The type of wear of the road surfaces has changed. New, more stronger and


lasting pavements have been developed. The use of lightweight studs has also

changed the degree of wear. The use of thin pavements increases and the


life expectation has grown. The amount of heavy traffic increases and maximum

allowed axle load, as well as maximum allowed tire pressure increases. All


leads to a change from the traditional measures like rut depth to more


measures like crack information. In USA, Japan and south of Europe there is a

tradition in inventory of cracks. That is the reason why so many of the


crack measuring systems has their origin here. The first automatic systems


actually half automatic, they collected pictures of the surface and in a post


the pictures was subjectively judged to describe cracks. The judgment to


consists of two phases, severity level and degree of seriousness. This


inspection is a time consuming process and has a low level of repeatability.


first semiautomatic systems used film that had to be developed. This is still


but the technique to acquire films has improved and continues to improve.


are mainly three types of techniques that are used to day, namely:

1. Traditional video (analogue and digital)

2. Line scan video (analogue and digital)

3. Distance measuring laser cameras (point or line scan)

As examples of the three different techniques the following systems can be

mentioned: 1: PAVUE/Laser RST and WiseCrax (ARAN), 2: HARRIS, 3: G.I.E.

Laser Vision and Laser RST.

To get a complete automatic crack-measuring system there is also a need for


automatic classification and judgment. This is still the most difficult part


achieve. A lot of processor power and a well functioning classification model


needed to do this. To reduce the amount of data it would be an advantage to


this in real time.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut., VTI notat 24-2002 , 2002.
VTI notat
Keyword [en]
Swedish, Sweden, Cracking, Flexible pavement, Measurement, Method, Detection, Automatic, Laser, Video camera, Image processing, Classification
Research subject
Road: Highway design, Road: Surfacing
URN: urn:nbn:se:vti:diva-1392OAI: diva2:670102
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2016-02-25

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