This distortion is used to derive the dimensions of the object under test. Analysis of the shape of these line images can then be used to achieve an accurate geometric reconstruction of the object's surface shape.įigure 1: A projected laser line appears distorted when viewed from perspectives other than that of the projector. In laser-based triangulation systems, a narrow band of light projected onto a 3D surface produces a line of illumination that will appear distorted from an observation perspective other than that of the projector (Figure 1). These include how laser-based 3D triangulation systems are configured and how laser line parameters are specified. While the basic concept of measurement using triangulation is simple, there are a number of important details that must be addressed when implementing such systems. Machine vision systems based on 3D triangulation are employed in a range of industries from automotive and electronics manufacturing to lumber mills. Field validation included the comparison of manual inspections with manual inspections considered "ground-truth." The primary outcome of this project was field-validated evidence of the technology’s ability to automatically detect changes in the track structure and highlight these changes for review and possible action.Laser-based 3D triangulation systems can be configured in numerous ways to optimize the performance of a machine vision system Pavemetrics researchers used algorithms to record and detect changes in fasteners, anchors, spikes, ties, joints, and ballast-as well as record rail manufacturing information. The LRAIL system includes a library of computer algorithms designed to make automatic measurements, inventory features, and detect changes in trackbed infrastructure. In this project, LRAIL was mounted on a hi-rail testing vehicle and tested at Amtrak’s Bear, DE facility and on mainline track. LRAIL is a rail inspection system based on the principle of laser triangulation and combines pulsed high-power, invisible, laser line projectors and synchronized cameras to capture a high-resolution-intensity image and 3-dimensional range profile of the railway trackbed.
teamed with Amtrak to demonstrate the feasibility of automated track change detection using its Laser Rail Inspection System (LRAIL).
0 kommentar(er)
