1 results about "Laser vibrometry" patented technology

This invention relates to the field of pipeline quality inspection technology, and discloses a visual inspection device and method based on sewage pipeline production. The visual inspection device includes an inspection station frame, an outer insert, an inner insert, an elastic waveguide roller, and a laser vibrometer array. The outer and inner inserts are nested in a hierarchical manner, each equipped with an independent air-floating ring for segmental centering. The inner insert carries a small-diameter annular reflector that extends into the sealing groove area to perform circumferential surface imaging. The elastic waveguide roller has a multi-frequency piezoelectric excitation module embedded in it, which couples elastic wave pulses of different frequencies into the socket wall through an annular flange. The laser vibrometer array receives the scattered wave signals to calculate the depth of defects within the wall. All components use the inspection station frame as a common coordinate reference to achieve the correlation between surface defect data and wall defect data.