ODiSI-A Optical Distributed Sensor Interrogator Users Guide
●Luna Technologies’ Optical Distributed Sensor Interrogator (ODiSI) uses swept-wavelength coherent interferometry to measure temperature and strain using optical fiber as the sensor. The ODiSI offers the ability to test a structure at numerous specific points of interest over an extended area with user-configurable sensing locations and gauge lengths.
●Fiber optics undergo well defined physical changes as a result of changes in temperature and strain. The ODiSI is able to measure the strain or temperature at every location in a fiber at a given time. By comparing measurements made at two different times the ODiSI calculates and displays the change in strain or temperature.
●One advantage of using optical fibers as sensors is that they are extremely small and light weight.ODiSI sensors are optical fiber with a width of less than 0.2 mm and can be as long as 50 m or as short as desired. A second advantage is that optical fibers do not require electrical connections at the measurement point. Typical foil strain gauges have a sensing region that is 3 mm long— though the entire gauge is much larger than that—and measure strain at a single point over time. Foil strain gauges also require that each gauge be wired to a measurement channel.
●Another advantage of the ODiSI over other measurement systems is that the ODiSI can identify each sensing fiber and detect where the fiber begins relative to a known point such as the end of a ODiSI Users Guide9 patch cable. In order to identify and locate a fiber the fiber data file must be installed into the software. The software can then identify which fiber is physically attached to the ODiSI.
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2013/12/5 |
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2 MB |
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