GPS RTK Techniques for Construction Monitoring of Super Deep-Water Open-Caisson

2014 ◽  
Vol 580-583 ◽  
pp. 2865-2871
Author(s):  
Yan Guang Hao ◽  
Xiang Liang Liu ◽  
Jian Bo Liu
Keyword(s):  
Real Time ◽  
Deep Water ◽  
Yangtze River ◽  
Positioning System ◽  
Construction Monitoring ◽  
Construction Period ◽  
Gps Rtk

The super open-caisson foundation of Taizhou Yangtze River Bridge was used by positioning system of anchor piers. GPS RTK Techniques was used to real-time monitor the open-caisson and by software compute current geometric posture of open-caisson timely. This could provide guarantee for sinking of caisson, and shorten construction period and save cost.

scholarly journals An acoustic-based approach for real-time deep-water navigation of an AUV

2018 ◽  
Author(s):  
A Tesei ◽  
M Micheli ◽  
A Vermeij ◽  
G Ferri ◽  
M Mazzi ◽  
...  
Keyword(s):  
Real Time ◽  
Deep Water ◽  
Autonomous Underwater Vehicles ◽  
Accurate Estimate ◽  
Doppler Velocity ◽  
Positioning System ◽  
Navigation Systems ◽  
June July ◽  
Proprioceptive Sensors ◽  
Acoustic Positioning

Navigation of Autonomous Underwater Vehicles (AUVs) remains a challenge due to the impossibility to use radio frequency signals and Global Positioning System (GPS). Navigation systems usually integrate different proprioceptive sensors to estimate the asset and the speed of the vehicle. In particular, the Doppler Velocity Log (DVL) is fundamental during the navigation to have an accurate estimate of the vehicle’s speed. This work addresses the enhancement of the navigation performance of an AUV through the development of a Deep Water Navigation Filter (DWNF). The DWNF is able to work in those scenarios where traditional navigation sensors show their limits: e.g., deep waters where DVL bottom lock cannot be achieved, or areas where the use of traditionally used static and dedicated beacons is incompatible with the mission requirements. The proposed approach exploits the concept of using a network of vehicles cooperatively supporting each other for their navigation. Several types of measurements coming from the different nodes (i.e. acoustic positioning system such as ship-mounted SSBL acoustic positioning system, USBL, range measurements from the different nodes) are fused in an Extended Kalman Filter framework with the odometry data. DWNF pushes forward the idea of using a network of robotic assets as a provider of navigation services allowing more flexible and robust operations of the deployed system. The approach has been tested at sea during several experiments. We report here results from DWNF running successfully in real-time on the NATO STO-Centre for Maritime Research and Experimentation (CMRE) vehicles during the Dynamic Mongoose’17 experimentation off the South coast of Iceland (June-July 2017). 

scholarly journals Kajian Perbandingan Luas Hasil Pengukuran Bidang Tanah Menggunakan GPS RTK-Radio dan RTK-NTRIP

2021 ◽  
Vol 4 (1) ◽  
pp. 65
Author(s):  
Rizki Irianto ◽  
Farouki Dinda Rassarandi
Keyword(s):  
Real Time ◽  
Global Positioning System ◽  
Positioning System ◽  
Total Station ◽  
Global Positioning ◽  
Gps Rtk

Dengan berkembangnya teknologi dalam survei pemetaan seperti halnya penggunaan GPS Geodetik, maka penerapan dari teknologi untuk kebutuhan survei perlu memperhatikan faktor-faktor tertentu seperti ketersediaan alat, sumber daya manusia hingga kondisi lapangan. GPS atau biasa dikenal dengan Global Positioning System merupakan teknologi/alat atau sistem yang memberikan informasi berupa posisi kepada pengguna secara global dan real-time di permukaan bumi yang berbasis data satelit. Dengan teknologi tersebut diperoleh ketelitian yang tinggi dengan waktu yang singkat dalam penentuan sebuah posisi. Penelitian ini bertujuan untuk mengetahui ketelitian hasil pengukuran luas bidang tanah menggunakan teknologi GPS RTK-Radio dan GPS RTK NTRIP sebagai sikap pengambilan keputusan. Penelitian dilakukan terhadap daerah dengan obstruksi dan tanpa obstruksi fisik. Nantinya, dari penelitian ini diperoleh nilai-nilai koordinat (X,Y) dari GPS RTK-NTRIP maupun RTK-Radio, yang kemudian dihitung luasnya dan dibandingkan dari hasil pengukuran menggunakan ETS (Electronic Total Station) terhadap standar ketelitian luas dari BPN. Hasil perhitungan selisih luas lahan baik dengan obstruksi secara fisik maupun tidak, masih masuk dalam toleransi ketelitian BPN, walaupun untuk lahan yang terdapat obstruksi fisik memiliki selisih antara pengukuran menggunakan GPS dan ETS yang cukup besar yaitu hampir mencapai 5 m2.

scholarly journals Vision-Based Real-Time Indoor Positioning System for Multiple Vehicles

2020 ◽  
Vol 53 (2) ◽  
pp. 15446-15453
Author(s):  
Maximilian Kloock ◽  
Patrick Scheffe ◽  
Isabelle Tülleners ◽  
Janis Maczijewski ◽  
Stefan Kowalewski ◽  
...  
Keyword(s):  
Real Time ◽  
Indoor Positioning ◽  
Positioning System ◽  
Multiple Vehicles ◽  
Indoor Positioning System

scholarly journals Investigation of accurate method in 3-D position using Cors-Net in Istanbul

2012 ◽  
Vol 18 (2) ◽  
pp. 171-184 ◽  
Author(s):  
Kutalmis Gumus ◽  
Cahit Tagi Celik ◽  
Halil Erkaya
Keyword(s):  
Real Time ◽  
Conventional Method ◽  
Global Positioning System ◽  
Complex Structure ◽  
Accurate Method ◽  
Reference Station ◽  
Positioning System ◽  
Virtual Reference ◽  
Global Positioning ◽  
Set Up

In this study, for Istanbul, there are two Cors Networks (Cors-TR, Iski Cors) providing Virtual Reference Station (VRS), and Flachen Korrektur Parameter (FKP), corrections to rover receiver for determining 3-D positions in real time by Global Positioning System (GPS). To determine which method (or technique) provides accurate method for position fixing, a test network consisting of 49 stations was set up in Yildiz Technical University Davudpasa Campus. The coordinates of the stations in the test network were determined by conventional geodetic, classical RTK, VRS and FKP methods serviced by both Cors-TR and Iski Cors. The results were compared to the coordinates by the conventional method by using total station. The results showed a complex structure as the accuracy differs from one component to another such as in horizontal coordinates, Y components by CorsTR_VRS and Cors_TR_ FKP showed 'best' results while the same technique provided X components consistent accuracy with the Y component but less accurate than by real time kinematic (RTK). In vertical components, of all the techniques used for the h components, CorsTR_VRS showed 'best' accuracy with three outliers.

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