Figure 3.
An experimental setup photograph presents a rectangular plastic block mounted vertically on a shaker platform. A checker pattern is attached to the front surface of the block. Labels identify an accelerometer mounted near the upper-left side of the block, a laser sensor positioned above the block, and a shaker connected at the base. A vertical double-headed arrow labelled Vibrating direction indicates upward and downward motion beside the block. Dimensional annotations indicate 10 millimetre spacing for individual checker squares, 100 millimetre block height, and 50 millimetre block width. Additional arrows point to the checker pattern on the plastic block and to the labelled components surrounding the structure.Vibrating block on shaker photographed at a distance of 100 mm (1280 × 720 pixels)