A Novel Static Calibration Method for Antenna Position Error Based on CDGPS

2012 ◽  
Author(s):  
Hu Guansong ◽  
Dong Yunfeng
Keyword(s):  
Calibration Method ◽  
Position Error ◽  
Static Calibration ◽  
Antenna Position

scholarly journals A Calibration Method of Phase Error Caused by Target’s Position Error

2021 ◽  
Vol 187 ◽  
pp. 188-193
Author(s):  
Fang Liu ◽  
Ming Lyn ◽  
Haohao Hou
Keyword(s):  
Phase Error ◽  
Calibration Method ◽  
Position Error

scholarly journals Research of Calibration Method for Industrial Robot Based on Error Model of Position

2021 ◽  
Vol 11 (3) ◽  
pp. 1287
Author(s):  
Tianyan Chen ◽  
Jinsong Lin ◽  
Deyu Wu ◽  
Haibin Wu
Keyword(s):  
Coordinate System ◽  
Industrial Robot ◽  
Calibration Method ◽  
Error Model ◽  
Position Error ◽  
Industrial Robots ◽  
Positioning Error ◽  
Robot Position ◽  
General Measurement ◽  
Parameter Error

Based on the current situation of high precision and comparatively low APA (absolute positioning accuracy) in industrial robots, a calibration method to enhance the APA of industrial robots is proposed. In view of the "hidden" characteristics of the RBCS (robot base coordinate system) and the FCS (flange coordinate system) in the measurement process, a comparatively general measurement and calibration method of the RBCS and the FCS is proposed, and the source of the robot terminal position error is classified into three aspects: positioning error of industrial RBCS, kinematics parameter error of manipulator, and positioning error of industrial robot end FCS. The robot position error model is established, and the relation equation of the robot end position error and the industrial robot model parameter error is deduced. By solving the equation, the parameter error identification and the supplementary results are obtained, and the method of compensating the error by using the robot joint angle is realized. The Leica laser tracker is used to verify the calibration method on ABB IRB120 industrial robot. The experimental results show that the calibration method can effectively enhance the APA of the robot.

Augmented Reality Overlay System for Computer-guided Needle Procedures

1969 ◽  
Author(s):  
Zachary Baum
Keyword(s):  
Augmented Reality ◽  
Real Time ◽  
Region Of Interest ◽  
Calibration Method ◽  
Position Error ◽  
Ct Image ◽  
Entire System ◽  
Projected Image ◽  
Needle Interventions

Purpose: Augmented reality overlay systems can be used to project a CT image directly onto a patient during procedures. They have been actively trialed for computer-guided procedures, however they have not become commonplace in practice due to restrictions of previous systems. Previous systems have not been handheld, and have had complicated calibration procedures. We put forward a handheld tablet-based system for assisting with needle interventions. Methods: The system consists of a tablet display and a 3-D printed reusable and customizable frame. A simple and accurate calibration method was designed to align the patient to the projected image. The entire system is tracked via camera, with respect to the patient, and the projected image is updated in real time as the system is moved around the region of interest. Results: The resulting system allowed for 0.99mm mean position error in the plane of the image, and a mean position error of 0.61mm out of the plane of the image. This accuracy was thought to be clinically acceptable for tool using computer-guidance in several procedures that involve musculoskeletal needle placements. Conclusion: Our calibration method was developed and tested using the designed handheld system. Our results illustrate the potential for the use of augmented reality handheld systems in computer-guided needle procedures. 

The Calibration Method of a Large Six-Axis Force Sensors

2013 ◽  
Vol 753-755 ◽  
pp. 2091-2094 ◽  
Author(s):  
Min Yang
Keyword(s):  
Force Sensor ◽  
Calibration Method ◽  
Force Sensors ◽  
Static Calibration

Based on the accelerator calibration method of six-axis force sensors, the system of static calibration for a large six-axis force sensor is build, The accelerator calibration method are introduced detail. the designed six-axis force sensor in multi-dimensional accelerators field is calibrated and the result is well used. the system of static calibrations a contraption, which is smart cheap and practicality.

scholarly journals Assessment of GNSS Position Integrity with the Use of Post-Processed EGNOS Data in the Area of Szczecin -Świnoujście Waterway

2018 ◽  
Vol 25 (1) ◽  
pp. 67-77
Author(s):  
Mateusz Bilewski ◽  
Paweł Zalewski
Keyword(s):  
Position Error ◽  
Gps Receiver ◽  
Gnss Receiver ◽  
Gnss Measurements ◽  
Antenna Position

AbstractGNSS measurements can be supplemented by the information available in EGNOS system even if one has only GNSS receiver that is not processing Satellite-Based Augmentation Systems data. The article describes how to obtain the variances of ranges to the satellites used for positioning when the final antenna position and satellites’ elevation and azimuths values are recorded. To verify how the resultant estimates of position error correspond to real errors the research based on GPS receiver was conducted.

A Phase Calibration Method Robust to the Sensor Position Error

2017 ◽  
Vol 6 (0) ◽  
pp. 10
Author(s):  
Min XU ◽  
Guang-ming HUANG ◽  
Yan-ni Shen ◽  
Jiang-bo LIU ◽  
Li WANG ◽  
...  
Keyword(s):  
Calibration Method ◽  
Position Error ◽  
Sensor Position ◽  
Phase Calibration
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