HBM FS42, Руководство пользователя, Страница: 33 / 76

Measuring Examples
FS42
A4250-5.0 HBM: public
33
A branch can accommodate sensors with wavelengths
corresponding to all standard HBM FS wavelengths. The
number of sensors in a channel can vary if there is previ­
ous knowledge about the spectral range the sensors will
cover. The major concern is the overlap of adjacent sen­
sors. The available optical channels have simultaneous
acquisition, meaning that the sensing network can have a
large number of fiber Bragg grating sensors interrogated
at the same time.
The employed technology allows a multi-functionality
meaning that on the same branch it is possible to mea­
sure Strain, Temperature, Displacement, Pressure,
Acceleration, etc
…
The sensing network can be up to 10 km away from the
interrogator for there are no EM/RF interferences or sig­
nificant losses of light in the optical fiber.
Each FBG sensor has a characteristic central wavelength
(λ
0
) that depends only on the measurand. This means
that with this technology there is no need for recalibra­
tions every time the system is shut down.
The Portable BraggMETER is a portable interrogator
designed to be autonomous (uses battery) and easy to
carry (small size and reduced weight) to be plainly used
in different projects.