Principle of Measurement
The device is based on two CCD-row cameras. Each of them takes an image of an outside edge of the tube. The cameras are installed on a transfer unit. Its position is adapted in accordance with the diameter to be measured. The positions of the cameras as well as the position of the tubes edges on the cameras are evaluated in a micro controller. T his way the diameter of the tube is determined in a precise and reliable way.
Structure
The system comprises the following components:
- camera unit
- illumination unit
- electronic unit.
Operation
Special emphasis has been placed on the
operator convenience of the apparatus:
Any operation of the device is not
required. The measuring process works automatically without operation.
The camera unit changes the positions of the cameras by means of the
motor driven transfer
unit automatically in accordance with the
diameter to be measured. Any adjustment is not necessary.
Specifications
- Measuring range: 60 ... 900 mm
- Measuring accuracy: 0.01 mm
- Measuring distance: adaptable
- Display and transfer of the measured values: digital display, serial interface RS 232
- non-contact measurement
- measurement can be provided within flames
- high measuring frequency and accuracy
- no adjustment required
- no wear and drift
ODM 900 at a quartz glass
resizing lathe.
The camera is left behind the
tube.
In order to protect it against
high temperatures,
the device is equipped with water
cooling
and radiation protection.
Device for tube measurement at
a Down Draw tubing line
by using 2 units ODM 200 (below
in the picture).