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The main sensors and
instrumentation proposed for the Cornell NEES consist of an expansion
of the existing data acquisition system, the addition of an advanced
fiber-optic signal conditioning unit, and several large-displacement
extensometers. Currently the Winter Laboratory uses a variety of signal
conditioning units for data acquisition. Many of the units are used
in multiple experimental setups and can be reconfigured readily for
other research applications. We propose to purchase additional channels
of signal conditioning, along with commercially available high-speed
multiplexers, drivers, data samplers, and control computers. These
systems will be capable of multichannel, high-speed data acquisition
for a wide range of experimental setups. All are compatible with existing
computer interface and software packages for developing data control
programs. The data acquisition systems will be integrated with the
servo-hydraulic hardware for any special control functions required,
such as phased servo control for multiple actuator use.
The fiber optic instrumentation consists of a high-resolution,
high-precision system designed around a Fabry-Perot interferometer
(FPI). This is an eight-channel, high speed sensor conditioner which
would be appropriate for slow or fast testing (sampling rates up
to 1000Hz) in the high crane bay and elsewhere. This system will
be capable of multi-channel measurements of temperature, pressure,
force, displacement, or strain using a common sensor-conditioning
unit with interchangeable sensors. The laser extensometers are high-precision
instruments capable of measurements in the ranges of 5-127 mm and
8-381 mm. These devices also are compatible with the specified data
acquisition systems.
For more in-depth information and specifications about our sensors, please
click here.
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