All Trimble total stations use Autolock® technology to find, track, and lock onto prisms.
The Trimble SX12 scanning total station uses a digital camera-based system for its Autolock implementation. One major advantage of the SX12’s camera-based system is that it can better differentiate between multiple reflections within the tracker field of view. This means when aiming to permanent target installations, the SX12 requires a smaller prism separation than what’s possible with analogue trackers. Similarly, when tracking, the SX12 is able to keep following the currently locked target, even when one or more undesired reflective objects come into view of the tracker.
Some key takeaways from this paper include:
The tracker, EDM and telecamera are all coaxial
Minimum prism separation depends on prism size and range. The images of two targets need to be separate on the detector for the tracker to interpret them as two targets.
The SX12 has good target separation capabilities: about 40 mm centerto-center at close distances, and 85 mm at 100 m.
Download the complete white paper to read about the details.
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