scholarly journals Optical Theodolite Based Rationality Check of Measurement Data From Pulse Radar

2021 ◽  
Author(s):  
Shaolin Hu ◽  
Wenqiaqng Jiang ◽  
Jiahui Liang ◽  
Jian Li
Keyword(s):  
Pitch Angle ◽  
Three Dimensional ◽  
Measurement Data ◽  
Radar Data ◽  
Measuring Channel ◽  
Dimensional Measurement ◽  
Pulse Radar ◽  
Angle Measuring ◽  
Three Dimensional Measurement ◽  
Optical Theodolite

Abstract Theodolite and radar are important measurement and control devices in aviation, aerospace and other fields. In order to make sure the tracking measurement and navigation control of aircraft and spacecraft safely, this paper creatively proposes a novel method to check the rationality of the three-dimensional measurement data (distance, azimuth and pitch angle) of the pulse radar by using the two-dimensional measurement data (azimuth and pitch angle) of the optical theodolite. Specifically, three different rationality checking functions are constructed for the three different cases of unreliable ranging channel, unreliable angle measuring channel and unreliable ranging and angle measuring channels, and are used for the rationality checking of radar data in the above three cases respectively. Simulation results show that the correct rate is more than 95% as long as the data measured by optical theodolite are reliable.

Detecting the Underground Displacement by Integrated Sensor Equipped with Three-Dimensional Measurement Method

2013 ◽  
Vol 336-338 ◽  
pp. 172-179 ◽  
Author(s):  
Guo Qing Jiang ◽  
Qing Li ◽  
Yang Ming Xie
Keyword(s):  
Measurement Method ◽  
Three Dimensional ◽  
Measurement Data ◽  
High Sensitivity ◽  
Integrated Sensor ◽  
High Data ◽  
Dimensional Measurement ◽  
Real Time Measurement ◽  
Three Dimensional Measurement ◽  
Scope Of Application

Measurement of underground displacement is of great significance. Now, there are various measuring methods to detect underground displacement. But each of them has its own scope of application and limitation. According to actual demand, this paper puts forward an integrated sensor which utilize three-dimensional measurement method to supervise the underground displacement. This sensor can not only measure the size and direction of the displacement, but also can achieve real-time measurement data. Method and realization of displacement measurement are introduced, as well as the experimental data. Comparing with other several measurement methods, three-dimensional measurement method is much better than the normal ones, including high data transmission speed, high sensitivity, strong practicability etc.

Three-Dimensional Measurement Data Registration Based on Planar Circle Target

2013 ◽  
Vol 33 (2) ◽  
pp. 0215002 ◽  
Author(s):  
魏新国 Wei Xinguo ◽  
刘涛 Liu Tao ◽  
刘震 Liu Zhen
Keyword(s):  
Three Dimensional ◽  
Measurement Data ◽  
Data Registration ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement

scholarly journals PRECISIONS MEASUREMENT FOR THE GRASP OF WELDING DEFORMATION AMOUNT OF TIME SERIES FOR LARGE-SCALE INDUSTRIAL PRODUCTS

2015 ◽  
Vol XL-4/W5 ◽  
pp. 153-157
Author(s):  
R. Abe ◽  
K. Hamada ◽  
N. Hirata ◽  
R. Tamura ◽  
N. Nishi
Keyword(s):  
Time Series ◽  
Quality Management ◽  
Construction Industry ◽  
Large Scale ◽  
Three Dimensional ◽  
Measurement Data ◽  
Welding Deformation ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement ◽  
Deformation Amount

As well as the BIM of quality management in the construction industry, demand for quality management of the manufacturing process of the member is higher in shipbuilding field. The time series of three-dimensional deformation of the each process, and are accurately be grasped strongly demanded. In this study, we focused on the shipbuilding field, will be examined three-dimensional measurement method. The shipyard, since a large equipment and components are intricately arranged in a limited space, the installation of the measuring equipment and the target is limited. There is also the element to be measured is moved in each process, the establishment of the reference point for time series comparison is necessary to devise. In this paper will be discussed method for measuring the welding deformation in time series by using a total station. In particular, by using a plurality of measurement data obtained from this approach and evaluated the amount of deformation of each process.

THREE-DIMENSIONAL MEASUREMENT OF COLUMNAR JOINTING IN THE BISHOP TUFF, OWENS RIVER GORGE, CALIFORNIA

2017 ◽  
Author(s):  
Antonio M. Bird ◽  
◽  
Katherine A. Kelker ◽  
Elizabeth S. Brogden ◽  
Jeff Glazner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bishop Tuff ◽  
Columnar Jointing ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement

scholarly journals The first observation of 4D tomography measurement of plasma structures and fluctuations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chanho Moon ◽  
Kotaro Yamasaki ◽  
Yoshihiko Nagashima ◽  
Shigeru Inagaki ◽  
Takeshi Ido ◽  
...  
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Axial Direction ◽  
Axial Position ◽  
Entire Cross Section ◽  
Helicon Plasma ◽  
Emission Profile ◽  
Dimensional Measurement ◽  
Tomography System ◽  
Three Dimensional Measurement

AbstractA tomography system is installed as one of the diagnostics of new age to examine the three-dimensional characteristics of structure and dynamics including fluctuations of a linear magnetized helicon plasma. The system is composed of three sets of tomography components located at different axial positions. Each tomography component can measure the two-dimensional emission profile over the entire cross-section of plasma at different axial positions in a sufficient temporal scale to detect the fluctuations. The four-dimensional measurement including time and space successfully obtains the following three results that have never been found without three-dimensional measurement: (1) in the production phase, the plasma front propagates from the antenna toward the end plate with an ion acoustic velocity. (2) In the steady state, the plasma emission profile is inhomogeneous, and decreases along the axial direction in the presence of the azimuthal asymmetry. Furthermore, (3) in the steady state, the fluctuations should originate from a particular axial position located downward from the helicon antenna.

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