Sonelastic
®
Systems
SA-BC Adjustable support for bars and cylinders
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9.2 Positioning the acoustic sensor
Step 01:
Mount the acoustic sensor in the Sturdy Tripod clip or in the vertical mounting
base, as described in
8.3
–
Mounting the acoustic sensor in the vertical base
and on the Sturdy Tripod;
Step 02:
Adjust the height or distance of the acoustic sensor, so its end is at a distance of
approximately 1 cm away from the specimen, as illustrated below;
Note: The
distance is not critical for the results.
Step 03:
Position the Acoustic Sensor. It may be in line with the center of the inferior
face of the specimen, when focusing on the flexural mode; in line with and
above the specimen, when focusing on the longitudinal mode; or to the side of
the inferior face (near the Support-cables at the 0.32 L position), when aiming
to obtain both flexural and torsional modes.
Note:
For more details on the correct positioning of the Acoustic Sensor, verify 10
–
Acquisition and Excitation Modes.
9.3 Positioning the IED Automatic Impulse Device
Step 01
:
Check if the RT Impulse Device is directly below the center of the inferior face
of the specimen if the focus is on the flexural mode; or to the side of the
inferior face (0.32 L) to measure flexural and torsional modes;
Note:
For more details on how to correctly position the Impulse Device, see 10
–
Acquisition and Excitation Modes;
Step 02:
Turn the adjusting nut of the Impulse Device clockwise and anticlockwise to
allow the vertical movement of its tip. Adjust the position so it remains
approximately 3 mm away from the specimen, as pictured next:
