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During the deployment, the main C-ALS cable provides power to the C-ALS probe and enables two-way data
communications between the C-ALS HD and a Windows tablet running Carlson Scan software.
Prior to deployment, the C-ALS probe is aligned against a known orientation on a supplied jig. This establishes a
starting, reference heading for the gyro. The known coordinate of the hole collar gives a starting location for the
survey.
Readings of the internal IMU are taken at fixed intervals as the C-ALS probe is deployed along the borehole. At
each of these intervals, information from the sensors is collected, and coordinates are calculated with reference
back to the known collar location. Thus, a picture of the path that the C-ALS probe has taken is built up. The IMU
sensors also enable accurate positioning of the unit when it is scanning and ensure that each point in the resulting
‘point cloud’ can be correctly geo-referenced.
Carlson Scan software enables the C-ALS HD to be controlled remotely by operators in a safe location. The
deployment, the borehole video and all scans can be viewed on-screen in real-time.
Carlson Scan software processes the data for editing, viewing and export to third-party modelling and CAD
packages.
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