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A 400-kHz High-Accuracy Laser Telemeter for Distributed Measurements of 3-D Profiles

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4 Author(s)
Fumagalli, Luca ; Q-Tech s.r.l., Rezzato, Italy ; Tomassini, P. ; Zanatta, M. ; Docchio, F.

A distributed telemeter is herein presented, which has specifically been designed for the high-speed high-resolution monitoring of trains in railway portals but can be adapted to a number of industrial and environmental applications. The system uses a single transmitter/receiver unit to feed, using optical fiber pairs, a number of measuring stations. It makes use of an ultrashort fiber laser operating at 400 kHz or, alternatively, a fiber-coupled diode laser and presents in-house developed solutions to obtain a 40-dB dynamic range, thus allowing to monitor targets within large distance/angle/color intervals. The system has been developed, tested, and installed on a train-monitoring portal in the Roma-Napoli railway, in the framework of an effort to increase the safety of trains entering tunnels in the Italian railway system.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:60 ,  Issue: 3 )