A displacement wedge helps measure displacement/distance using the principle of persistence of vision. Test engineers can use it as a method of verification to establish that their vibration test system is functioning without unexpected activity due to an incorrect input sensitivity.
Using a Displacement Wedge
- In VibrationVIEW, select Configuration > Inputs and enter the transducer sensitivities.
- Attach a displacement wedge to the head of the shaker.
- Run a Sine test. For electrodynamic shakers, 0.1 in displacement pk-pk and 30Hz are typical values. These values may differ if using a hydraulic system.
- When the shaker comes up to level, the two lines on the displacement wedge will blur. Confirm that the lines intersect each other at 0.1 in displacement.
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