ODiSI 6
ODiSI 6
User’s Guide
Page 8
The ODiSI’s fiber optic sensors range from 1 m to 100 m in length for distributed strain
measurements and 1 m to 5 m for temperature measurements. Optical fiber’s flexibility and
small diameter (< 0.2 mm) lends itself to being located and routed through and inside parts
and locations not typically accessible with foil gages and thermocouples.
Because optical fibers undergo well defined local optical changes as a result of changes in
strain and temperature, the ODiSI is able to interpret the reflected signal along a sensor into
independent strain or temperature measurements throughout the length of the fiber at
intervals as low as 0.65 mm.
Figure 3-1 ODiSI sensor fiber.
ODiSI Instrument Specifications
The ODiSI platform is available in several channel configurations. Channels are sampled
serially at the maximum allowable data rate for the specific sensor length and number of active
channels. Both temperature (not SC Temperature) and strain sensors can be used on different
channels during the same test. A test with SC Temperature sensors cannot contain other
sensor types. A test with Luna CFG sensors cannot contain other sensor types.
The table below outlines the performance specifications for different configurations. Further
details can be found in the product data sheet, which is available on the Luna website
(
).
