High Accuracy On-Line Calibration System for Current Transformers Based on Clamp-Shape Rogowski Coil and Improved Digital Integrator

MAPAN ◽  
2016 ◽  
Vol 31 (2) ◽  
pp. 119-127 ◽  
Author(s):  
Zhen-hua Li ◽  
Su-hong Yan ◽  
Wei-zhong Hu ◽  
Zhen-xing Li ◽  
Yan-chun Xu
Keyword(s):  
High Accuracy ◽  
Rogowski Coil ◽  
Calibration System ◽  
Current Transformers ◽  
Digital Integrator ◽  
On Line

Research on PCB Rogowski Current Transformer Based on AD7742

2014 ◽  
Vol 981 ◽  
pp. 589-593
Author(s):  
Xin Lao Wei ◽  
Bo Zhu ◽  
Bing Pang ◽  
Tong Liu ◽  
Song Wang ◽  
...  
Keyword(s):  
Current Transformer ◽  
High Accuracy ◽  
Rogowski Coil ◽  
Magnetic Saturation ◽  
Iron Core ◽  
Measuring Range ◽  
Digital Integrator ◽  
Saturation Phenomenon ◽  
Good Linearity ◽  
Rogowski Coils

Rogowski coils is a kind of special structure hollow coils, it has good linearity, no iron core, no magnetic saturation phenomenon and wide measuring range, which has been used to measure all kinds of various changes current. The current transformer consist of PCB Rogowski coil and digital integrator has been designed, includes the structure of PCB Rogowski coils and the principle digital integrator based on AD7742. The test of PCB current transformer show that it has high accuracy and PCB coils has good linearity. It can meet the requirement of current measurement.

Design and Implement of High-Accuracy On-Line Metal Thickness Measuring Instrument Based on NiosII Processor

2013 ◽  
Vol 834-836 ◽  
pp. 930-934
Author(s):  
Shou Liang Yang ◽  
Bao Liang Yang
Keyword(s):  
Eddy Current ◽  
Low Cost ◽  
High Accuracy ◽  
Resolving Power ◽  
Current Sensor ◽  
Measuring Instrument ◽  
Precision Data ◽  
Eddy Current Sensor ◽  
Metal Thickness ◽  
On Line

The paper proposes a new design of high-accuracy On-line Metal Thickness Measuring Instrument, which was based on EP2C20 series FPGA chip, through adding NiosII soft processor and other interfaces to FPGA, equipped with high precision data collection system and TFT LCD module and so on. The key hardware blocks schematics and components of the RC Oscillation Circuit,eddy current sensor Circuit,rectifier and filter Circuit,A/D converting circuit,FPGA Circuit are described,software flow charts and sample codes are given. According to practice, The measurement range of this system is 1~100 mm and the resolving power is 0.1 μm. degree of linearity is 1%, The system has many features including small volume of hardware, low cost, high detecting precision, convenient operating, high intelligent and so on, leading to broad and bright future. Key words: NiosII processor; eddy current sensor; metal thickness

scholarly journals Design and Development of a 5-Channel Arduino-Based Data Acquisition System (ABDAS) for Experimental Aerodynamics Research

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2382 ◽  
Author(s):  
Antonio Vidal-Pardo ◽  
Santiago Pindado
Keyword(s):  
Data Acquisition ◽  
Low Cost ◽  
Data Acquisition System ◽  
High Accuracy ◽  
Acquisition System ◽  
Calibration System ◽  
Experimental Aerodynamics ◽  
Accuracy Level ◽  
The Fourier Transform ◽  
Cup Anemometer

In this work, a new and low-cost Arduino-Based Data Acquisition System (ABDAS) for use in an aerodynamics lab is developed. Its design is simple and reliable. The accuracy of the system has been checked by being directly compared with a commercial and high accuracy level hardware from National Instruments. Furthermore, ABDAS has been compared to the accredited calibration system in the IDR/UPM Institute, its measurements during this testing campaign being used to analyzed two different cup anemometer frequency determination procedures: counting pulses and the Fourier transform. The results indicate a more accurate transfer function of the cup anemometers when counting pulses procedure is used.

A digital integrator for on-line pulmonary compliance measurements

1965 ◽  
Vol 20 (3) ◽  
pp. 561-563 ◽  
Author(s):  
Tamotsu Shinozaki ◽  
John Abajian ◽  
John S. Hanson ◽  
Burton S. Tabakin
Keyword(s):  
Digital Integrator ◽  
Pulmonary Compliance ◽  
On Line

scholarly journals Design and validation of broadband calibration system for fiber-optical current transformers

2019 ◽  
Vol 1311 ◽  
pp. 012026
Author(s):  
YU Jicheng ◽  
LI Dengyun ◽  
LI Jun ◽  
LI He ◽  
LI Zhicheng
Keyword(s):  
Calibration System ◽  
Current Transformers ◽  
Fiber Optical

Establishment of 40,000 A Rogowski coil calibration system and its uncertainty analysis

CPEM 2010 ◽  
2010 ◽  
Author(s):  
Yoon Hyoung Kim ◽  
Jae Kap Jung ◽  
Jeon Hong Kang ◽  
Sang Hwa Lee ◽  
Sang Ok Han
Keyword(s):  
Uncertainty Analysis ◽  
Rogowski Coil ◽  
Calibration System

Design and Analysis of PCB Rogowski Coil Current Transformer

2014 ◽  
Vol 672-674 ◽  
pp. 984-988
Author(s):  
Biao Su ◽  
Li Xue Li ◽  
Yi Hui Zheng ◽  
Xin Wang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Power System ◽  
High Sensitivity ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Coil Current ◽  
Electronic Current ◽  
Rogowski Coils ◽  
Electronic Current Transformers

Electronic current transformers are more suitable for the development of power system compared with traditional electromagnetic current transformers. Rogowski coil current transformer is one of three electric current transformers. According to the measurement principle of Rogowski coils, the equivalent circuit of PCB Rogowski coils is analyzed. By using four PCB Rogowski coils combined, a PCB Rogowski coil current transformer is designed and tested. The results show that the designed PCB Rogowski coil transformer has good linearity and high sensitivity and measurement accuracy and it can meet the requirement of power system.

An on-line digital integrator for physiological data.

1968 ◽  
Vol 24 (4) ◽  
pp. 593-597
Author(s):  
J A Freeman ◽  
R E Smith
Keyword(s):  
Physiological Data ◽  
Digital Integrator ◽  
On Line
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