Shake reduction method of underwater laser scanning system for high-precision measurement

2019 ◽  
Vol 58 (08) ◽  
pp. 1 ◽  
Author(s):  
Liangliang Xie ◽  
Xu Zhang ◽  
Dawei Tu ◽  
Guoliang Xiao ◽  
Pan Jin ◽  
...  
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
Laser Scanning ◽  
Reduction Method ◽  
Scanning System ◽  
High Precision Measurement ◽  
Underwater Laser ◽  
Laser Scanning System

Underwater laser scanning system

1991 ◽  
Author(s):  
Roswell W. Austin ◽  
Seibert Q. Duntley ◽  
Richard L. Ensminger ◽  
Theodore J. Petzold ◽  
Raymond C. Smith
Keyword(s):  
Laser Scanning ◽  
Scanning System ◽  
Underwater Laser ◽  
Laser Scanning System

Scanning Error Analysis of Transmission Laser Scanning Diameter Measurement System

2013 ◽  
Vol 753-755 ◽  
pp. 2303-2306 ◽  
Author(s):  
Yi Wang ◽  
Jia Cheng ◽  
Hong Shuo Chen
Keyword(s):  
Laser Scanning ◽  
Angle Measurement ◽  
Structure Design ◽  
Scanning System ◽  
Motor Speed ◽  
Optical Encoder ◽  
High Precision Measurement ◽  
Zero Position ◽  
Adjustment Error ◽  
Laser Scanning System

Transmission laser scanning system can be used for high precision measurement of the shaft radial dimensions due to the advantages of containing no scanning lens and easy accessing to the high paralleled scanning beam. But as a dynamic optical system, its dynamic characteristics mainly depend on the scanning characteristics of the laser scanning emitter. That is, the scanning errors affect the accuracy of the measurement quite significant. The scanning model with procession characteristic was established in the presence of turntable shaft rotation instability. Furthermore, the equations of the optical encoder zero position trigger error caused by shaft radial runout and the motor speed adjustment error between the angle measurement error were derived respectively. Research has guiding significance for the laser scanning emitter structure design as well as the system measurement uncertainty analysis.

scholarly journals SCOUT3D – AN UNDERWATER LASER SCANNING SYSTEM FOR MOBILE MAPPING

2019 ◽  
Vol XLII-2/W18 ◽  
pp. 13-18
Author(s):  
M. Bleier ◽  
J. van der Lucht ◽  
A. Nüchter
Keyword(s):  
Laser Scanning ◽  
Tracking System ◽  
Optical Tracking ◽  
Scanning System ◽  
Water Tank ◽  
Floating Platform ◽  
Mobile Mapping ◽  
Underwater Laser ◽  
Underwater Camera ◽  
Laser Scanning System

Abstract. This paper presents an underwater laser scanning system and GNSS based trajectory estimation system for scanning from a surface vessle in shallow water. The system has an above-the-water and an underwater component. Above-the-water two low-cost multiband GNSS receivers with an antenna baseline of one meter are used for RTK positioning with heading. The full 6-DOF is estimated by fusing the satellite navigation data with a MEMS-based INS. The 3D data is captured in water using a structured light scanner consisting of a low-light underwater camera and a green cross line laser projector. We describe the development of the system and employed hardware components. We show results of scanning a large test object in a water tank acquired by from a tripod with a motorized yaw axis. Additionally, we demonstrate first results of mobile mapping from a floating platform. We evaluate the performance of the system by measuring the 6-DOF trajectory with an external optical tracking system. Additionally, we assess the quality of the created point cloud using reference objects placed in the scene.

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