Measuring system for tolerance dimensions of railway vehicle

The invention discloses a measuring system for tolerance dimensions of a railway vehicle. The system includes a hand-held measuring device and a three-dimensional data processing unit. The hand-held measuring device includes a DLP projector, two CCD cameras, a timing sequence control board, an image acquisition card and a data processor. A three-dimensional data processing unit interface includes a point cloud display area, a point cloud information area, an instruction editing area and a camera display area. The timing sequence control board is separately connected to the data processor, the two CCD cameras, and the DLP projector. The DLP projector is connected to the data processor. The two CCD cameras are connected via the image acquisition card and the data processor. The system is stable, efficient, and can be better fit for detecting the dimensions of the internal decorative objects of the railway vehicle, which prevents the defects of traditional methods in obtaining the tolerance dimensions of the internal decorative objects, such as low precision, slow speed, and human influence and meets the requirements in the production of modern railway vehicles.