Motion Measurement on Rear Swinging Fork

The video shows the app­li­ca­ti­on of a ste­reo image cor­re­la­ti­on (pha­se syn­chro­ni­zed) for a three-dimen­sio­nal dis­pla­ce­ment mea­su­re­ment or move­ment ana­ly­sis (Vic-3D).

The used ste­reo came­ra sys­tem is based on two 5 Mpi­xel came­ras with a frame rate of 6Hz (at full reso­lu­ti­on) in com­bi­na­ti­on with the isi-sys syn­chro­niz­a­ti­on and trig­ger device for stro­bo­scopic obser­va­ti­on of perio­dic events.

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Four mea­su­re­ment are­as (hydrau­lic cylin­der — below, wheel hub — left, swing­arm — midd­le and line­ar unit — right abo­ve) with speck­le pat­terns were moni­to­red for the eva­lua­ti­on. The vec­tor arrows repre­sent the cur­rent dis­pla­ce­ment state.