Can anybody recommend me on the strain gauges which are attached along a steel bar, say, 3 mm in diameter, and can respond at a sampling rate of 100 kHz?

Question

Or anybody has similar application, it would be very grateful if you can share your experience.

Answer 1

Many thanks for your information. We are about to investigate the dynamic performance of soil anchorage subject to dynamic impulse in a geotechnical centrifuge. Basically, 5 model anchorages (3 mm in diameter) are to be constructed. Each model anchorage is instrumented with 1 accelerometer, 1 load cell and 6 strain gauges. Therefore, the minimum instrumentation would be
1) 30 strain gauges
2) 5 accelerometers
3) 5 load cells
It is worth noting that all the instruments would eventually reside in a geotechnical centrifuge operating in a 10g gravitational field. Whilst the DAQ system would experience much less 'g force' since they are to be placed close to the rotation axis of the machine.
These model anchorages would be tested one by one dyn
amically on each individual basis, whilst the other four are also preferably to be monitored during the tests. For an active model anchorage which is under testing, simultaneous sampling is preferred for its 8 sensors to be measured at the same instant in time (Besides, it is also understood that the natural frequency of the model anchorage is estimated to be in the range of several kHz). For the other four model anchorages, simultaneous sampling could be less demanding. It would therefore be ideal that simultaneous sampling can be switched among the active testing model anchorages.
I am greatly appreciated if you can further advise me on this. Thanks in advance.