Long and narrow component detecting device

The invention relates to a long and narrow component detecting device, which comprises a detecting platform, longitudinal moving devices, a portal frame, a camera lateral guiding device, 3D cameras and a laser displacement sensor. A plurality of grooves are formed in a detection area on the detecting platform; the distance between two of the plurality of grooves is smaller than view width of the 3D camera; the depth or width of the grooves is different; the two longitudinal moving devices are arranged on the two sides of the detecting platform and symmetrical relative to the detecting platform; a rack and pinion mechanism of the longitudinal moving device drives the detecting device to longitudinally slide along a guide rail; three 3D cameras are fixed on a camera bridge frame; the camerabridge frame is in nut connection with a ball screw fixed on the portal frame through a screw sliding way; a motor rotates to drive the camera bridge frame to move through a screw nut, thereby realizing simultaneous lateral m