scholarly journals Development of a method for measuring the astronomical azimuth using an electronic total station

2021 ◽  
Vol 310 ◽  
pp. 03007
Author(s):  
M.A. Khanzadyan ◽  
A.V. Mazurkevich
Keyword(s):  
High Precision ◽  
Metrological Support ◽  
Measuring Instruments ◽  
Total Station ◽  
Total Budget

In this article, the method of measuring the astronomical azimuth using an electronic total station, which is not intended for performing astronomical work, is considered. A method of measuring the astronomical azimuth using a high-precision electronic total station has been developed. Studies have been carried out to establish the influence of the components of errors in measurements of astronomical azimuth, forming the total budget of the error of the developed methodology, which has been tested on the reference stationary complex of metrological support of azimuth measuring instruments (СMS AMI).

Application of Total Station Instrument in the Installation and Measurement of High-Precision Steel Structure

2014 ◽  
Vol 1065-1069 ◽  
pp. 2251-2254
Author(s):  
Fang Ru Gui
Keyword(s):  
High Precision ◽  
Steel Structure ◽  
Measurement Technology ◽  
Technical Problems ◽  
Total Station ◽  
Calibration Measurement ◽  
Spatial Measurement ◽  
Structure Measurement

The analysis of the difficulties of structure measurement of a stadium and the application of total station instrument spatial measurement technology specifically solve the control and measurement of the steel structure installation, location survey of the pre component installation, and the technical problems in the process of calibration measurement, which has ensured that the accuracy of the entire steel structure construction.

SYSTEM OF STANDARDIZATION AND METROLOGICAL SUPPORT OF SPEED DEFECTIVE MEANS OF RAILS IN THEIR PRODUCTION AND OPERATION

2021 ◽  
pp. 14-29
Author(s):  
V. F. Tarabrin
Keyword(s):  
Metrological Support ◽  
High Speed ◽  
Dynamic Testing ◽  
Flaw Detection ◽  
Measuring Instruments ◽  
High Speed Rail ◽  
Technical Control ◽  
Instrument Control ◽  
Factory Testing ◽  
Production And Operation

The importance of standardization and metrological support for high-speed rail flaw detection is noted. JSC “Firm TVEMA” has created a service for quality, factory testing and metrological support. The data on the development and development of the production of JSC “Firma TVEMA” of a complex of removable and mobile technical means of NDT with maximum automation of instrument control and processing of control data, creation of a quality service, factory testing and metrological support are given. It is shown that the service includes structural subdivisions: the department of metrology and quality, a metrological laboratory, a testing laboratory, a technical control bureau that provide scientific and methodological support for the development of measuring instruments, testing, verification and calibration of flaw detection instruments during their production and operation. JSC “Firma TVEMA” organized the production and delivery of models of rail defects to railways with primary certification by the metrological laboratory for dynamic testing of mobile NDT vehicles. A test section was put into operation at the Experimental Ring of JSC VNIIZhT with certified defect models, which made it possible to accumulate research material for the further development of high-speed flaw detectors.

scholarly journals High-Precision Distance Measurement with an unmanned, Moving Target

1986 ◽  
Vol 8 ◽  
pp. 93-95
Author(s):  
H. Ito ◽  
K. Schroff ◽  
Hans-jörg Frei
Keyword(s):  
Sea Ice ◽  
High Precision ◽  
Distance Measurement ◽  
Moving Object ◽  
Measuring Instruments ◽  
Moving Target ◽  
Personnel Cost ◽  
Greenland Sea ◽  
Single Station ◽  
Set Up

A device was developed, which rotates a marker for the distance measurement in the desired direction, without an operator at the spot. This is also possible with a moving object, on which the marker is set up. The device, together with adequate distance-measuring instruments, yields a precise distance measurement by a single observer at a single station. Examples of measurements using it during sea-ice studies in the Greenland Sea are described. It is shown that the application of the instrument provides a satisfactory basis for precise glacier surveying with limited personnel, cost, and time.

scholarly journals Experimental Comparison of Outdoor Baseline Measurements by Different Methods

2019 ◽  
Vol 131 ◽  
pp. 01057
Author(s):  
Youyi Gu ◽  
Li Wang ◽  
Fengzhuo Xiang ◽  
Wen Ouyang ◽  
Lixing Jiang
Keyword(s):  
Direct Measurement ◽  
High Precision ◽  
Optical Measurement ◽  
Experimental Results ◽  
Experimental Comparison ◽  
Total Station ◽  
Length Standard ◽  
Gnss Receivers ◽  
Surveying And Mapping

Outdoor baseline is the special length standard in the field of surveying and mapping, it can be used to verify the addition and multiplication constants of the total station and other photoelectric rangefinders. In order to ensure the authenticity, accuracy and reliability of verification results, conducting outdoor baseline traceability periodically is essential. At present, direct measurement by 24m invar tape or high precision electro-optical measurement is mainly used to achieve the traceability of outdoor baseline in China. Based on Shenyang baseline field, high precision rangefinder μ-base, 24m invar tape and high precision GNSS receivers are used for comparison experiments, and the experimental results are analyzed.

scholarly journals High-precision measurement of an involute artefact by a rolling method and comparison between measuring instruments

2009 ◽  
Vol 20 (4) ◽  
pp. 045105 ◽  
Author(s):  
Fumi Takeoka ◽  
Masaharu Komori ◽  
Aizoh Kubo ◽  
Hiroshige Fujio ◽  
Takehiro Ito ◽  
...  
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
Measuring Instruments ◽  
High Precision Measurement ◽  
Rolling Method

The Application of Embedding Operating System at the High-Precision Temperature Calibration Device

2010 ◽  
Vol 139-141 ◽  
pp. 2239-2242
Author(s):  
Jin Yao Li ◽  
Ming Ming Zhang ◽  
Hao Dong Huang
Keyword(s):  
Operating System ◽  
High Precision ◽  
Fast Response ◽  
Measuring Instruments ◽  
Temperature Calibration ◽  
Data Types ◽  
Precision Temperature ◽  
Self Tuning ◽  
Calibration Device ◽  
Stability Time

In order to meet the fast on-site calibration of temperature sensor and temperature measuring instruments, A kind of intellectualized high-precision temperature calibration device based on Embedding System is developed. This device based on ARM and a proportional-fuzzy self-tuning PID optimal control algorithm is characterized by high accuracy and fast response. Its performance parameter is given as following: measuring range, 35oC-600 oC, accuracy, ± 0.50 oC (at 600 oC), resolution ,0.01 oC, stability time 40 minutes(at 600 oC). To ensure the portability of μC/OS-II, a set of data types is defined by authors. As same as all the real time cores, it is necessary for μC/OS-II to reject the interrupt before accessing the critical section of codes, and the interrupt is to be allowed again after the access. In this paper, the design of system , especially the porting of μC/OS-II operating system, is introduced.

Self-Calibration of XY-Stage with Parallel Mechanism

2014 ◽  
Vol 590 ◽  
pp. 126-129
Author(s):  
Ryoshu Furutani ◽  
Satoshi Yokouchi ◽  
Miyu Ozaki
Keyword(s):  
High Precision ◽  
Parallel Mechanism ◽  
Least Squares Method ◽  
Calibration Method ◽  
Measuring Instruments ◽  
Precision Manufacturing ◽  
Kinematic Parameters ◽  
Self Calibration ◽  
Simulation And Experiment ◽  
Experimental Process

It is important to calibrate the straightness and the squareness of the XY-stage for precision manufacturing and measurement. Normally it is calibrated using much higher precise and accurate measuring instruments and/or artifacts. The high precision and accurate instruments and artifacts are expensive. So, in this paper, Self-calibration method is applied to XY-stage. This method does not require any much high precision and accurate instruments and artifacts. The normal XY-stage moves to the location at the unique coordinates. In this case, it is difficult to apply self-calibration method. Therefore, XY-stage is expanded to XYθ-stage with parallel mechanism. As this stage moves to the location at a lot of coordinates, self-calibration method is applied. This method is confirmed in simulation and experiment. In simulation, the extension lengths of mechanism are estimated from known kinematic parameters and the target coordinates. After that, estimated kinematic parameters are calculated by least-squares method from the extension lengths and the target coordinates. Finally, the positioning coordinates are calculated from the estimated kinematic parameters and the extension lengths. It is proved that the calibration method is effective by comparing the target coordinates and the positioning coordinates. In experiment, the experimental process is similar to the simulation without the estimation of extension lengths. The results of simulation and experiment are shown in this paper.

AVALIAÇÃO DE ÁREA E DISTÂNCIAS EM PLANTA OBTIDA VIA GOOGLE EARTH

2017 ◽  
Vol 32 (2) ◽  
pp. 189
Author(s):  
Alexandre Luis Da Silva Felipe ◽  
Lincoln Gehring Cardoso
Keyword(s):  
Computer Program ◽  
High Precision ◽  
Reference Value ◽  
Google Earth ◽  
Gps Receiver ◽  
Total Station

O presente trabalho objetivou avaliar distâncias horizontais e área de um polígono obtido através de imagem do Google Earth tendo como referência levantamento topográfico realizado em campo utilizando-se Estação Total. O processamento dos dados do levantamento topográfico foi realizado através do programa computacional DataGeosis versão Office que acusou elevada precisão, garantindo sua condição de referência. As coordenadas obtidas pelo Google Earth foram submetidos ao software AutoCAD 13 para desenho. Com os dados assim obtidos foi possível a geração de plantas bem como cálculo de distâncias horizontais e áreas em ambos os casos. Foi possível se plotar ambas as plantas em único desenho por se considerar para o primeiro ponto da poligonal obtida por levantamento topográfico convencional, um par de coordenadas obtido por receptor GNSS no primeiro ponto da poligonal. Concluiu-se que valor de área obtida através do Google Earth ficando próximo do valor da referência, bem como seu entorno, não significa a precisão do polígono visto que comprometedoras diferenças em distâncias ora à maior ora à menor podem estar sendo compensadas, no entanto pode-se admitir esse procedimento comum para uso em planejamento rural.PALAVRAS-CHAVES: Levantamento topográfico; Imagem do Google EarthEVALUATION OF AREA AND DISTANCES IN A MAP OBTAINED BY GOOGLE EARTHABSTRACT: The purpose of this study was to compare horizontal distances and areas of a polygon obtained by Google Earth image based in a topographical survey as reference using  total station. The processing of the survey was made by computer program Datageosis Office version accused high precision and so used as reference. The coordinates obtained on Google Earth was submitted to the AutoCAD 13 software for drawing. The data obtained enabled the maps generation and also to calculate horizontal distances and areas in both cases. It was possible to plot the two maps in a single drawing by considering for the first point of the polygon obtained by conventional surveying, a pair of coordinates obtained by a GPS receiver. It was concluded that the area value obtained through Google Earth being next to the reference value, does not means the polygon precision due to the fact of differences in distances sometimes the largest and sometimes the smallest being compensated, however it is possible to admit this procedure for use in general rural planning.KEYWORDS: Topographical survey ;Google Earth Image.   

Novel High-Precision Pitch Artifact Using Balls

2008 ◽  
Vol 381-382 ◽  
pp. 95-96 ◽  
Author(s):  
Masaharu Komori ◽  
Sonko Osawa ◽  
Osamu Sato ◽  
T. Kiten ◽  
D. Shirasaki ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
High Precision ◽  
Dimensional Accuracy ◽  
High Dimensional ◽  
Measuring Instruments ◽  
Order Accuracy ◽  
Special Process

In this research, a novel high-precision pitch artifact using balls is proposed for calibration of pitch measuring instruments. This pitch artifact is composed of the combination and the alignment of balls and cylinders on a plane. Balls, cylinders and planes are possible to be manufactured with several-ten-nanometer-order accuracy. Therefore, this artifact can accomplish high dimensional accuracy. In addition, manufacturing of this artifact is not difficult because time-consuming special process is not needed. In this report, the concept, structure and feature of this pitch artifact are proposed and theoretical analysis is carried out.

scholarly journals Metrological support of maintenance by the technical state of communication means

2021 ◽  
pp. 17-23
Author(s):  
Yevhen Ryzhov ◽  
Lev Sakovych ◽  
Yurii Myroshnychenko ◽  
Volodymyr Hrabchak ◽  
Yuriy Nastishin ◽  
...  
Keyword(s):  
Metrological Support ◽  
Large Scale ◽  
Technical Condition ◽  
Technical State ◽  
High Tech ◽  
Measuring Instruments ◽  
Metrological Reliability ◽  
Correct Evaluation ◽  
Optimal Sequence ◽  
Minimal Time

Modern and prospective communication means are among the most knowledge-driven, high-tech types of industrial products, which are subject to enhanced requirements for quality and efficiency of application. The effective functioning of modern communication means is provided by built-in software, including metrological support. In this paper, we consider the specifics of metrological maintenance of large-scale communication facilities (tens and hundreds of thousands of elements) consisting of separate subunits, the serviceability, maintenance, and recovery of which can be performed autonomously. It is proposed to enhance the efficiency of the by-state-maintenance (also called maintenance by the technical state) by accounting for the specifics of metrological support, establishing an optimal sequence of operations, selecting the measuring instruments in accordance with relevant requirements. To do this, one has to use a combined indicator composed of individual parameters of the tests and the probability of their preferred choice. This allows to assess the technical condition of the communication means with a given probability during a minimal time. In addition, one can estimate the time of maintenance, taking into account the metrological reliability and the probability of correct evaluation of the result of checking the parameters by the measuring instruments. The order of implementation of the obtained results is formalized in the form of an algorithm and an example of their realization is presented.

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