Displacement Wedge


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.


  1. In VibrationVIEW, select Configuration > Inputs and enter the transducer sensitivities.
  2. Attach a displacement wedge to the head of the shaker.
  3. 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.
  4. 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.

Contact VR and ask us to mail you some free displacement wedges.

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