Gauge Testing Compliments Our Analysis Services Perfectly
After manufacture test techniques can be used separately or in
conjunction with finite element analysis. It is an essential tool for
failure investigations or validation of design.
DYNAMIC 'HAMMER' TEST
struck with a rubber hammer will vibrate at its natural frequencies.
This response will be seen by the strain gauges and sensors. A
spectrum analysis of the test signals will yield the frequencies
associated with the natural modes of vibration. Damping
characteristics can also be measured in this way.
acquisition equipment and computer can be installed at any location
and is self powered. The photo opposite shows an installation in a
railway vehicle. Testing does not necessarily mean that equipment
needs to be taken out of service.
DESIGN AND CALIBRATION OF STRAIN GAUGE BOLTS
After disappointing performance with commercially available bolt
sensors MoreVision devised and produced special test bolts by introducing flats on the shank of the
bolts and attaching standard linear gauges (photo on the left). The
bolts were calibrated in a laboratory load cell shown in the photo on
BOLT RELAXATION TEST
Bolted joint performance is a common source of problems for mechanical
engineers testing a jointed assembly can help us understand poor joint
performance. Preload in bolts can be measured using load cells or
strain gauged bolts. It is possible to obtain a preload/torque diagram
and joint relaxation over a given time period.
SIGNAL PROCESSING AND ANALYSIS
Once data has been gathered from test the process of analysis of test
results and signal processing can begin.