A new miniature remote 3D laser scanning system for underground surveys has been launched by Measurement Devices. The 50mm diameter Cavity Autoscanning Laser System (C-ALS) is inserted into underground workings through predrilled boreholes.
Measurement Devices sales engineer, Anthony Comber, said: 'Following suggestions from users, the new C-ALS system is half the diameter of the earlier generation so it can be deployed through narrow boreholes.
The device measures the threedimensional void and its surface re ctivity. A motorised two-axis scanning head gives a 360° scan up to a range of 152m and the system has an increased scanning rate of up to 650,000 points in an hour.
The company's previous offering had to hang vertically, while the new C-ALS can scan from any direction and inclination. A digital compass and pitch-and-roll sensors inside the scanning head enable accurate positioning and orientation of the unit.
The new model incorporates a nosecone camera and infrared lighting system in the probe enabling it to gauge the exact distance from the borehole collar to the breakout point in a cavity.