For disaster prevention and control, water levels at remote places, such as dams, and lakes, need to be always monitored. Similar cases can be found in liquid tanks in factories or reservoirs in waterworks. Conventional sensors that need to be powered electrically are susceptible to power outages and possible risk of discharge sparks. A sensor design is required to make the network all optical and remove the need for an electric power supply for the distributed sensors.
To monitor water levels at long distances, a fiber-based
time-domain reflectometry network with optical amplification is proposed. A
collimator at each fiber end of a tree-type network retrieves 1.55 µm
wavelength pulses that are reflected from remote liquid surfaces. In the
present paper a successful simultaneous monitoring experiment of two water
levels in the laboratory, as well as a trial for detecting a disturbed surface
by beam-expanding and its theoretical background are reported.
Author (s) Details
Yoshiaki Yamabayashi
Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, 066-8655
Hokkaido, Japan.
Please see the book here:- https://doi.org/10.9734/bpi/caert/v8/2513
