<title>Laser Rangefinder For Robot Control And Inspection</title>

Abstract

AostractThree-dimensional surface point data is often useful for r000t control and inspection casks. Une design of sensors for collecting this data involves many cnoices, with selections made on tne oasis of data rate, accuracy, field of view, safety, size, object properties, and tne need for registered range and orightness data.A sensor has been designed with data rates of 30 kHz for origntness, 2 kHz for range in the scanning mode, and 250 Hz for range in tne random access mode.Range data accuracy is aoout .l of the field of view.The main components of the sensor are a low power laser (1 mW), a 1024 element CCO linear array camera, a galvanometer scanner, and a special interface to a minicomputer.Alternative Uesigns include stereo without using projected energy, white light projection, ultrasound, time -of-flignt measurements, multiple detectors, projecting planes versus oeams, two -dimensional array cameras and "position" sensors, and a variety of scanning mechanisms. IntroductionThe analysis of three -dimensional scenes is important for r000t control and inspection.A single intensity image often does not provide an adequate description of a tnree -dimensional scene, and tnerefore multisensory information [color, range, texture, etc. ] is nelpfull. Une useful source of three -dimensional information is range data. Work nas oeen done in scene analysis using only range data2 and, more recently, in exploiting registered intensity and range information 3,47 RANGE FINDERS ACTIVE METHODS PASSIVE METHODS

New Advances in Vehicular Technology and Automotive Engineering

“…In order to analyze the surface of a real-world object in 3-dimensions, it must be scanned and converted into digital 3-dimensional data. Laser scanners are very common and highly accurate 3D acquisition tools (Parthasarathy et al 1982;Sequeira et al 1995;Marszalec & Myllyla 1997;Gokturk et al 2004;Blais et al 2007). The latter are able to produce high resolution, high accuracy scans.…”

High-speed 3D optical sensing for manufacturing research and industrial sensing applications

“…Triangulation-based approaches are the most suitable technology for measuring medium-scale objects (e.g., a length scale from 1 cm to 1 m). The three most well-known triangulation-based technologies include laser scanning [20,21,22,23], stereo vision [24,25] and structured light [26,9,10]. The laser scanning method performs line-by-line scanning to obtain the surface topography of the scene, whose performance can be reduced when trying to map a complicated surface containing fine-scale features.…”

3D Surface Analysis for Automated Detection of Deformations on Automotive Body Panels

“…Laser scanners are very common and highly accurate 3D acquisition tools (Parthasarathy et al 1982;Sequeira et al 1995;Marszalec & Myllyla 1997;Gokturk et al 2004;Blais et al 2007). The latter are able to produce high resolution, high accuracy scans.…”