Tracking laser radar for 3D measurements of large industrial objects based on time-of-flight laser rangefinding and position sensitive-detection techiques

Anssi Mäkynen, Juha Kostamovaara, Risto Myllylä

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

A tracking laser radar device is proposed for the 3-D measurement of the shapes of large industrial objects. The measuring system includes a servo-controlled measuring head and small reflectors attached to the object. The sensor consists of a tracking sensor, a pulsed time-of-flight rangefinder and angle encoders. The implementation of the tracking sensor and its test results are explained in detail. Tracking is accomplished by illuminating the reflectors of the target object and focusing the reflected light on the surface of a four-quadrant (4Q) position-sensitive detector, the signals of which are used to drive the servo motors of the measuring head. The test results show a tracking sensor resolution of about 0.003 mm (/spl sigma/ value) and bias of about /spl plusmn/0.1 mm when the distance and angle of the target reflector vary in the ranges 2-5 m and /spl plusmn/45/spl deg/, respectively. The pointing accuracy of the tracking system was better than /spl plusmn/0.3 mm.
Original languageEnglish
Pages (from-to)40-49
Number of pages10
JournalIEEE Transactions on Instrumentation and Measurement
Volume43
Issue number1
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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tracking radar
Tracking radar
laser ranging
Optical radar
optical radar
Lasers
Sensors
reflectors
sensors
Range finders
quadrants
coders
illuminating
Detectors
detectors

Cite this

@article{8c179c8509964ec6997948d576393560,
title = "Tracking laser radar for 3D measurements of large industrial objects based on time-of-flight laser rangefinding and position sensitive-detection techiques",
abstract = "A tracking laser radar device is proposed for the 3-D measurement of the shapes of large industrial objects. The measuring system includes a servo-controlled measuring head and small reflectors attached to the object. The sensor consists of a tracking sensor, a pulsed time-of-flight rangefinder and angle encoders. The implementation of the tracking sensor and its test results are explained in detail. Tracking is accomplished by illuminating the reflectors of the target object and focusing the reflected light on the surface of a four-quadrant (4Q) position-sensitive detector, the signals of which are used to drive the servo motors of the measuring head. The test results show a tracking sensor resolution of about 0.003 mm (/spl sigma/ value) and bias of about /spl plusmn/0.1 mm when the distance and angle of the target reflector vary in the ranges 2-5 m and /spl plusmn/45/spl deg/, respectively. The pointing accuracy of the tracking system was better than /spl plusmn/0.3 mm.",
author = "Anssi M{\"a}kynen and Juha Kostamovaara and Risto Myllyl{\"a}",
year = "1994",
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pages = "40--49",
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Tracking laser radar for 3D measurements of large industrial objects based on time-of-flight laser rangefinding and position sensitive-detection techiques. / Mäkynen, Anssi; Kostamovaara, Juha; Myllylä, Risto.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 43, No. 1, 1994, p. 40-49.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Myllylä, Risto

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AB - A tracking laser radar device is proposed for the 3-D measurement of the shapes of large industrial objects. The measuring system includes a servo-controlled measuring head and small reflectors attached to the object. The sensor consists of a tracking sensor, a pulsed time-of-flight rangefinder and angle encoders. The implementation of the tracking sensor and its test results are explained in detail. Tracking is accomplished by illuminating the reflectors of the target object and focusing the reflected light on the surface of a four-quadrant (4Q) position-sensitive detector, the signals of which are used to drive the servo motors of the measuring head. The test results show a tracking sensor resolution of about 0.003 mm (/spl sigma/ value) and bias of about /spl plusmn/0.1 mm when the distance and angle of the target reflector vary in the ranges 2-5 m and /spl plusmn/45/spl deg/, respectively. The pointing accuracy of the tracking system was better than /spl plusmn/0.3 mm.

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