Other

Dcg Systems Gmbh

Thermosensorik Gmbh

Roman Louban

Jürgen Zettner

Peter Stolz

Juergen Zettner

Manfred Böhm

Christoph Doettinger

Christoph Döttinger

A method for calculating a centreline of an object is disclosed. An image of the object is divided into test areas. For each test area, detection direction and scanning direction are assigned from a list of limited directions. For each test area, at each scanning point a local point of the centreline is determined along the detection direction. An assigned smoothing function is applied to the collection of local points to determine the collection of pixels which define the centreline. The collection of pixels can be used to calculate the length of the centreline. Also, the coordinates of the pixels of the centreline can be used to average the intensity of the image along the centreline.

Method for evaluating the centerline of an arbitrarily shaped object

In a method for the automatic inspection of a welding seam using heat flow thermography, a feature vector is established which represents a time course of a detected heat flow. The feature vector is used to determine, from a series of thermal images, a first characteristic thermal image, which corresponds to a minimum heat flow through an object to be examined, and a second characteristic thermal image, which corresponds to a maximum heat flow through the object, wherein a heat flow directly from an excitation source has already dissipated. A suitable thermal image is used from the series of thermal images to detect and evaluate the welding seam in relation to defects of various defect types, for each defect type, the characteristic thermal images being used as references to determine the respective suitable thermal image.

Method for the automatic inspection of a welding seam by means of heat flow thermography

In a method for automated, contactless and non-destructive testing of a material joint (), a dynamic threshold value is varied between a minimum threshold value and a maximum threshold value, with regions of a heat flow dynamics through the material joint () being determined which represent values of the heat flow dynamics exceeding the dynamic threshold value. The regions of the heat flow dynamics are examined with respect to an abrupt change in perimeter. An Abrupt change in perimeter occurs if a boundary () between a molten zone () and a non-molten but still adhering zone () of the material joint () is being crossed.

Method for automated testing of a material joint

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Crailsheim, Germany

Roman Louban