Underwater laser triangulation sensor calibration method with refraction

2016 ◽  
Author(s):  
Gabriel Matos ◽  
Pedro Buschinelli ◽  
Tiago Pinto
Keyword(s):  
Calibration Method ◽  
Sensor Calibration ◽  
Laser Triangulation ◽  
Underwater Laser ◽  
Laser Triangulation Sensor ◽  
Triangulation Sensor

scholarly journals Influence of Speckle on Micro Form Measurement by a Laser Triangulation Sensor

2021 ◽  
Vol 87 (3) ◽  
pp. 294-300
Author(s):  
Hiroya FUKATSU ◽  
Mahiro ANDO ◽  
Shunsaku ISHIWATA ◽  
Jyoichi KUDO ◽  
Tatsuki OTSUBO ◽  
...  
Keyword(s):  
Laser Triangulation ◽  
Laser Triangulation Sensor ◽  
Triangulation Sensor

scholarly journals Testing the Sandblasting Process in the Manufacturing of Reference Spheres for Non-Contact Metrology Applications

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5187
Author(s):  
Víctor Meana ◽  
Eduardo Cuesta ◽  
Braulio J. Álvarez
Keyword(s):  
Laser Scanning ◽  
Low Cost ◽  
Coordinate Measuring Machine ◽  
Point Clouds ◽  
Laser Triangulation ◽  
Laser Sensor ◽  
Measuring Machine ◽  
Laser Triangulation Sensor ◽  
Triangulation Sensor

To ensure that measurements can be made with non-contact metrology technologies, it is necessary to use verification and calibration procedures using precision artefacts as reference elements. In this environment, the need for increasingly accurate but also more cost-effective calibration artefacts is a clear demand in industry. The aim of this work is to demonstrate the feasibility of using low-cost precision spheres as reference artefacts in calibration and verification procedures of non-contact metrological equipment. Specifically, low-cost precision stainless steel spheres are used as reference artefacts. Obviously, for such spheres to be used as standard artefacts, it is necessary to change their optical behavior by removing their high brightness. For this purpose, the spheres are subjected to a manual sandblasting process, which is also a very low-cost process. The equipment used to validate the experiment is a laser triangulation sensor mounted on a Coordinate Measuring Machine (CMM). The CMM touch probe, which is much more accurate, will be used as a device for measuring the influence of sandblasting on the spheres. Subsequently, the influence of this post-processing is also checked with the laser triangulation sensor. Ultimately, the improvement in the quality of the point clouds captured by the laser sensor will be tested after removing the brightness, which distorts and reduces the quantity of points as well as the quality of the point clouds. In addition to the number of points obtained, the parameters used to study the effect of sandblasting on each sphere, both in contact probing and laser scanning, are the measured diameter, the form error, as well as the standard deviation of the point cloud regarding the best-fit sphere.

scholarly journals STRICT GEOMETRIC CALIBRATION OF AN UNDERWATER LASER TRIANGULATION SYSTEM

2021 ◽  
Vol XLIII-B2-2021 ◽  
pp. 689-692
Author(s):  
H. Sardemann ◽  
C. Mulsow ◽  
H.-G. Maas
Keyword(s):  
Laser Light ◽  
Light Sheet ◽  
Calibration Method ◽  
Housing First ◽  
Laser Triangulation ◽  
Object Surface ◽  
Geometric Calibration ◽  
Novel Approach ◽  
Laser Plane ◽  
Underwater Laser

Abstract. This paper will describe a novel approach for the calibration of an underwater laser triangulation system. Underwater triangulation systems, consisting of a line laser and a camera can be used to determine the geometry of submerged objects or the topography of a water body bottom. Placing camera and laser line projector inside a waterproof housing leads to refraction effects at the air-glass-water interfaces, both of the laser light-sheet and image rays. This implies a deformed laser plane in the water and a curved line on the object surface. The proposed approach strictly models the geometry between camera, laser and housing. First experiments show, that the calibration method can be applied for water depth measurements with accuracies of 0.2–0.3 mm at depths in the order of 100 mm.

scholarly journals 3D Metrology Using a Collaborative Robot with a Laser Triangulation Sensor

2017 ◽  
Vol 11 ◽  
pp. 132-140 ◽  
Author(s):  
Gil Boyé de Sousa ◽  
Adel Olabi ◽  
Jorge Palos ◽  
Olivier Gibaru
Keyword(s):  
Laser Triangulation ◽  
3D Metrology ◽  
Laser Triangulation Sensor ◽  
Collaborative Robot ◽  
Triangulation Sensor
Sign in / Sign up

Export Citation Format

Share Document