Optical Metrology

Gåsvik, Kjell J.

doi:10.1002/0470855606

Cited by 201 publications

(151 citation statements)

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“…According to reference [15] the visual precision is mainly determined by the resolution of the human eye, the diameter of the pilot laser beam and the Rayleigh length of the pilot beam. This is in good agreement with the actual data (the resolution of the human eye is approximately 0,2 mm, the pilot beam diameter is 0,1 mm and its Rayleigh length is 3 mm.…”

Section: Resultsmentioning

confidence: 99%

“…The measurements of the workpiece's 3D shape are based on the laser-triangulation principle where the camera acquires images of the surface that is illuminated by a laser light plane from a different angle [15,25]. In such a configuration the laser stripe on the acquired image is distorted according to the surface of the measured section.…”

Section: Measurements Of the Workpiece's 3d Shapementioning

confidence: 99%

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Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

et al. 2017

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Original scientific paper One of the key challenges in robotic remote laser 3D processing (RL3DP) is to achieve high accuracy for the laser's working trajectory relative to the features of the workpiece. This paper presents a novel RL3DP system with an automatic 3D teaching functionality for a precise and rapid determination of the working trajectory which comprises a robot manipulator, 3D scanning head, fibre laser and an off-axis positioned camera. The 3D measurement is based on laser triangulation with laser-stripe illumination using the laser's pilot beam and scanning head. The experimental results show that the system has a precision better than 70 µm and 120 µm along lateral and vertical direction respectively inside the measuring range of 100 × 100 mm. The teaching time is 30-times shorter compared to a visual teaching procedure. Therefore, such a system can lead to large cost reductions for modern production lines that have constant changes to the products' geometries and functionalities. Keywords: edge detection; laser triangulation; remote laser processing; robot teaching; three-dimensional measurement Automatsko učenje robotskih laserskih daljinskih 3D obradnih sustava na osnovu laserske triangulacijeIzvorni znanstveni članak Jedan od bitnih izazova u daljinskoj laserskoj 3D obradi (RL3DP) je postizanje visoke točnosti jer laser radi po rubovima predmeta koji obrađuje. Ovaj rad prikazuje novi RL3DP sustav s automatskom 3D nastavnom funkcionalnošću radi točnog i brzog određivanja prijenosa detektiranih rubova koje obrađuje robot sa 3D skenerom, fiber laserom i izvan aksijalno pozicioniranom kamerom. 3D skeniranje se bazira na laserskoj triangulaciji sa pilotskom laserskom trakom. Eksperimentalni rezultati pokazuju da sustav ima preciznost bolju od 70 µm i 120 µm u bočnom i vertikalnom smjeru u mjernom području od 100 × 100 mm. Vrijeme učenja je 30-puta kraće u odnosu na vizualni postupak. Stoga, takav sustav može značajno smanjiti troškove obrade sa modernim proizvodnim sistemima koji se moraju prilagođavati stalnim promjenama geometrije i funkcionalnosti proizvoda.

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Section: Resultsmentioning

confidence: 99%

Section: Measurements Of the Workpiece's 3d Shapementioning

confidence: 99%

Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

et al. 2017

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“…(7.35) and (7.43) of [1]. This results in a phase function with a quadratic dependence on x and cannot be eliminated unless l p →∞ , i.e., plane wave illumination.…”

Section: System Descriptionmentioning

confidence: 99%

“…Projected fringes is a full field method for mapping the topography of surfaces [1][2][3][4][5]. It consists of imaging the fringes projected onto the surface with subsequent processing of the fringe data.…”

Section: Introductionmentioning

confidence: 99%

Deformation measurement of circular steel plates using projected fringes

Gåsvik

Robbersmyr

Vadseth

et al. 2013

Int J Adv Manuf Technol

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Fringe projection is a versatile method for mapping the surface topography. In this paper, it is used to measure the deformation of steel plates under static penetration. Here, the surface shape changes continuously. Therefore, it is important to minimize the registration time. To achieve this, we apply a method of fringe location with subpixel accuracy that requires only a single exposure for each registration. This is in contrast to phase shifting techniques that require at least three separate exposures.

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“…Bunlardan en önemli olanları ise lazer kullanı-larak yapılan ölçüm yöntemleridir. Tek dalga boyunda ve farklı güçlerde elde edilebilmesi lazeri optik ölçüm sistemleri için popüler hale getirmiştir [1,2]. Bu çalışmada talaşlı imalat olan frezeleme işleminde yapılan ölçümler için interferometrik bir sistem geliştirilmesi amaçlanmıştır.…”

Section: Introductionunclassified

CNC Freze Makinalarında İş Parçasının Talaş Derinliğindeki Değişimin İnterferometrik Temassız Ölçümü

Zengin¹,

Varol²

2017

Marmara Fen Bilimleri Dergisi

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ÖZETİmalat metrolojisinde ışık kaynağı kullanılarak yapılan ölçümlerde mekanik değerlerin elektronik değerlere çevrilerek bilgisayara aktarıl-ması işlemi üreticiye birçok kolaylık sağlamaktadır. Bunun nedeni ise ışık kaynağı kullanılarak yapılan ölçüm sistemlerinin hem temassız olması hem de yüksek hassasiyette olması ve anında bilgisayar tarafından işlenebilmesidir. Ayrıca fiziksel olarak ölçüm alınması zor olan iş parçalarının da ölçümü için büyük kolaylık sağlamaktadır. Bu çalışmada, talaşlı üretim endüstrisinde büyük bir yer tutan freze tezgâhla-rında düzlem yüzey frezeleme işlemi sırasında talaş derinliğindeki değişim değerini Michelson interferometresi esaslı ölçüm düzeneği ile ölçen bir sistem gerçekleştirilmiştir. Michelson interferometresi ile elde edilen saçakları saymak amacıyla bir elektronik saçak sayıcı devresi tasarlanmıştır. Freze makinasının kontrolünü sağlayan SimCNC yazılımı ile sisteme girilen talaş derinliği değeri, işlem sonucunda lazer ölçüm sisteminin elde ettiği ölçüm değeri ile karşılaştırılıp aralarındaki %7'lik farklar yorumlanmıştır. ABSTRACTWith respect to measurements made by use of light source in the manufacturing metrology, the conversion of the mechanical values to the electronic ones and then transfer of the results to PC provides a number of advantages for the manufacturer. The reason is that the measurement systems with use of light source are both non-contact and high precise, making instant processing by the computer. Furthermore, it also provides great convenience for measurement of the workpieces, which are physically hard to measure. This study concerns a system to measure the changing value in the cutting depth on basis of Michelson interferometry measuring mechanism during the milling of plane surfaces on the milling machines, which take an important place in the machining industry. An electronic fringe counter is designed in order to count the fringe obtained by the Michelson interferometry. The cutting depth value entered in the system by use of Sim CNC, which controls the milling machine and the measurement value obtained by the laser measurement system as a result of the process were compared and the differences of 7% between them were interpreted.

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Optical Metrology

Cited by 201 publications

References 0 publications

Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

Deformation measurement of circular steel plates using projected fringes

CNC Freze Makinalarında İş Parçasının Talaş Derinliğindeki Değişimin İnterferometrik Temassız Ölçümü

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