Horizontal comparator for the system calibration of digital levels – realization at the Faculty of civil engineering, CTU Prague and in the laboratory of the Department of survey and mapping Malaysia (JUPEM) in Kuala Lumpur.

<p>Metrological procedures require a leveling staff calibration for an estimation of a true staff scale. The calibration process is usually realized on laboratory comparators. Two automatic comparators for digital level calibration were built by the staff of Department of Geomatics. This article brings some information about properties of developed systems and about a control software for the comparators.</p>

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Calibration of Frequency Shift System of Wind Imaging Interferometer

Photogrammetric Engineering & Remote Sensing ◽

10.14358/pers.86.12.753 ◽

2020 ◽

Vol 86 (12) ◽

pp. 753-760

Author(s):

Yongqiang Sun ◽

Chunmin Zhang ◽

Pengju Zhang ◽

Tingkui Mu ◽

Tingyu Yan ◽

...

Keyword(s):

Wind Speed ◽

Frequency Shift ◽

Single Factor ◽

System Calibration ◽

Calibration Process ◽

Accuracy Requirement ◽

Imaging Interferometer ◽

System Vibration

In this paper, the frequency shift system calibration of the wind imaging interferometer is analyzed. By establishing the frequency shift system vibration and reflectivity models, the single factor and comprehensive factors models are used to invert the wind speed and temperature, respectively. The parameters of the frequency shift system that meet the design accuracy requirement of the instrument are determined. The conclusion of this paper provides theoretical instructions for the calibration process of wind imaging interferometer.

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The Simulator for the Gas Fuel System – Calibration Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.838.63 ◽

2016 ◽

Vol 838 ◽

pp. 63-70

Author(s):

Yury Vladimirovich Panov ◽

Aleksey Nikolaevich Pronnikov ◽

Krzysztof Lapinski

Keyword(s):

Control System ◽

Alternative Fuels ◽

Gas Injection ◽

Technical Training ◽

Fuel System ◽

Training Process ◽

System Calibration ◽

Calibration Process ◽

Injection Control ◽

Gas Fuel

The article reviews issues of training process effectiveness increase by means of implementation and adaptation of the simulator of gas injection control system for petrol engine performed by applying LPG TECH Co technologies, when technical training relates to the use of alternative fuels on the motor transport.

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Coded-Structured Light System Calibration Using Orthogonal Phase Shift Coding Combined with Zhang’s Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.981.348 ◽

2014 ◽

Vol 981 ◽

pp. 348-351

Author(s):

Xiao Yang Yu ◽

Xiao Liang Meng ◽

Hai Bin Wu ◽

Xiao Ming Sun ◽

Li Wang

Keyword(s):

Phase Shift ◽

Model Calibration ◽

Structured Light ◽

Calibration Method ◽

Dimensional System ◽

Plane Model ◽

System Calibration ◽

Calibration Process ◽

Projector Calibration ◽

Orthogonal Phase

In coded-structured light three dimensional system, system calibration plays a vital role for the measurement accuracy. The camera calibration method is very mature, but the study about projector calibration is less. Therefore, this paper proposes a projector calibration method with simple calibration process and high accuracy. This method combines the Zhang’?s plane model calibration method with orthogonal phase shift coding. In calibration process, this paper uses phase shift coding pattern to establish the relationship of projector image and camera corner point coordinates. According to the image coordinates in the projector’?s perspective, we program and calculate the projector’?s internal and external parameters matrix based on the Zhang’?s plane model calibration toolbox. The results show that the proposed method is simple and flexible, the maximum relative error of the calibration parameters is 0.03%, and it meets the requirements of system calibration in medical or industrial fields.

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