The device has been designed
to measure the outside diameter of tubes or similar articles, such as
technical glass, domestic glass, laboratory glass.
Principle of Measurement The device is based on a CCD-row camera. It takes an image of the outside edges of the tube, which is projected by means of a telecentric lens onto the sensor. The size of the camera as well as the lenses are adapted in accordance with the diameter to be measured. In consequence of the telecentric lens the image of the object to be measured is not influenced by the distance to the camera. In this way the diameter of the tube is determined in a precise and reliable way. Structure The system comprises the following components:
Operation Special emphasis has been placed on the
operator convenience of the apparatus: Any operation of the device is
not required. Specifications
|
Two diameter measuring devices at a Danner tubing line.
Application at a Vello tubing line: three wall thickness and two diameter measuring devices supply the measuring values for the selecting computer. |
Structure and main dimensions of ODM |
Further measuring ranges and dimensions on demand. |
References
Technische Glaswerke
Ilmenau, Germany (5 units) |