This article explains how the operator must proceed to properly record a video clip with the ring laser equipment.
The end part describes how to position the calibration rings or the calibration points. For more details please read the manueal manual to the module LaserScsan.
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Prior to the scan
• Center camera head
• Set Laser ring diameter to 75% of image height
• Set recording format to MPEG2 in order to increase accuracy of measuring results
• Place the whole length of the calibration bar within the camera view angle
• Cover the manhole in order to avoid light intrusion at the beginning of recording a video clip
During the scan
• Switch off the light and text display: only the laser ringmust ring must be visible
• Increase the light intensity of the laser ring at larger diameters accordingly
• Decrease image luminosity in order to get disturbing red sparks disappeared
• Scan with a constant low speed (max. 17 cm/sec) in order to avoid jerky movements of the camera head.
• Keep the camera head centered during recording
• Record a sequence showing the entire calibration bar (100 mm - 600 mm)
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