| 摘要 |
A contour meter, for example comprising a light source generating a laser line, and an accompanying registering device, for example a comaera, suchas a CCD camera or a CMOS camera, are arranged to measure the shape of a section throught the object, for example a cylinder. This section shape is obtained by a number of three-dimensional points on the enveloping surface determined bz the of the camera registered laser light line reflected bz the object. Then, these tree-dimensional points are adapted to the previously known shape of the object. By continuously repeating the measuring, a measure is obtained of a number or parameters of the object, including the size, the position in two dimensions, and the direction. It is also possible to only adapt the measuring data to a selection of these parameters. Thus, in a number of applications, it is possible to assume a fixed direction of the object when moving. If such an assumption is possible, a more robust measuring can be obtained. By using the system and the method of the invention a number of advantages compared to tprior art are obtained. Thus, only one contour meter is needed, provididng a measuring system that is inexpensive to manufacture and, further, eacy to assemble and calibrate. Other advantages achieved include a high accuracy and the possibly to measure objects with a varying position.
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