Campbell 4-Channel Current/Voltage SDM-CVO4 Instrukcja Użytkownika Pobierz pdf (Strona 6)

Applications

Structural and Seismic Monitoring

 e rapid sampling rate and large number of high

resolution channels provided by the CR9000X-series

dataloggers make them ideal for structural and seismic

monitoring.  ese dataloggers can be used in applica-

tions ranging from simple beam fatigue analysis, to

structural mechanics research, to continuous monitor-

ing of large, complex structures.

 e on-board instruction

set supports many algo-

rithms and math functions

that are useful for structural

and seismic monitoring.

 e datalogger can store

data as rain ow or level

crossing histograms.  e

rain ow and level crossing

algorithms can be pro-

cessed for extended periods

of time, not just a  nite

number of cycles.  e

instruction set also sup-

ports triggered output with

pre-trigger data capture

capability. Triggers can

be based on sensor output,

time, and/or user control.

For example, if an overpass or bridge is being moni-

tored, data collection can be triggered:

(1) by a sensor detecting the approach of a car or

an earthquake,

(2) at pre-programmed times, or

(3) by pushing a button.

 e datalogger’s control functions allow it to activate

alarms, actuate electrical devices, or shut down equip-

ment based on time or measured conditions.

Typical sensors used for structural and seismic moni-

toring include:

• Carlson strain meters

• Foil strain gages (set up in quarter, half, or full

bridge strain con gurations)

• Inclinometers

• Crack and joint sensors

• Tilt sensors

• Piezoresistive accelerometers

• Piezoelectric accelerometers

• Capacitive accelerometers

• Borehole accelerometers

• Servo force balance accelerometers

Our dataloggers have been used over the years to monitor many prominent bridges. Whether bridges are large or small,

Campbell Scienti c is committed to providing quality instrumentation and support to help maintain their safety.

The CR9000X can provide

remote, unattended monitor-

ing of high-way overpasses,

amusement park rides, roads,

buildings, and retaining walls.

Photography by Boily

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