Focusing on measuring the yaw displacement of the crane boom, the XTOP3D XTDIC system was used to measure the critical load-bearing locations of two crane booms operating at different speeds, one low and one high.

1. Marking Code Points

First, several markers are attached to the top of the crane boom, which takes several minutes.

2. 3D Dynamic Displacement Measurement

To measure the yaw displacement of the boom, the XTOP3D XTDIC dynamic measurement system collects data in real time. Based on the displacement changes of the markers, the yaw displacement of the boom is measured perpendicular to the boom plane.

Analysis data of boom displacement at low speed for the first crane

Analysis data of boom displacement at high speed for the second crane

3. Analysis Curve

The difference between the highest peak and lowest trough in this measurement is of particular interest. As the graph shows, when the crane is operating at low speed, the differences between the highest peak and lowest trough values at the three points are 46.08, 44.78, and 43.05 mm, respectively. When the crane is operating at high speed, the differences between the highest peak and lowest trough values at the three points are 76.12, 73.73, and 71.44 mm, respectively. The subsequent, long-term, small fluctuations indicate that the boom is also oscillating left and right within its final stable position.