Strain Gauges

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Strain Gauges [Copy link]

A dynamic force is loaded on one end of the cantilever beam, and a strain gauge is used to measure the strain of the cantilever beam. To ensure that the strain gauge can work normally, what is the maximum change frequency of the dynamic force or the maximum operating frequency of the strain gauge?

lehuijie

My suggestion is: 1. Try the strain gauge yourself. Different strain gauges have different specifications. No one in the forum can know what you are using. 2. Find the manufacturer. They will have this information.

gmchen

Usually, the mass of the strain gauge is much smaller than that of the cantilever beam, so it is the cantilever beam that determines the frequency response characteristics of the sensor, and it has nothing to do with the strain gauge. If you buy a commodity sensor, the manufacturer should have data on the frequency response characteristics of the sensor. If you design a cantilever beam yourself and then buy a strain gauge and stick it on, you should ask the designer.

maychang

"Dynamic force is applied to one end of the cantilever beam, and the strain of the cantilever beam is measured with a strain gauge." The main thing measured is the strain of the beam, and the strain of the beam and the dynamic force on the beam are two different things. The strain is proportional to the external force only when the frequency of the dynamic force change is much lower than the natural frequency of the beam and the deformation is not large.