Test Method for AIC based on extension IEEE Std. 1241 Sine-wave Fit using Multi-Sine Signals

2018 ◽  
Author(s):  
Veronica M. L. Silva ◽  
Raimundo C. S. Freire ◽  
Cleonilson P. de Souza ◽  
Bruno W. S. Arruda ◽  
Edmar C. Gurjao ◽  
...  
Keyword(s):  
Sine Wave ◽  
Test Method

A New Dynamic Test Method of Fiber Optic Gyroscope

2012 ◽  
Vol 157-158 ◽  
pp. 245-249 ◽  
Author(s):  
Xu You Li ◽  
Na Zhang
Keyword(s):  
Input Signal ◽  
Fiber Optic ◽  
Dynamic Error ◽  
Dynamic Performance ◽  
Dynamic Test ◽  
Sine Wave ◽  
Test Method ◽  
Working Environment ◽  
Fiber Optic Gyroscope ◽  
Sway Motion

The sway motion of ships follows sine law. Therefore, it needs high dynamic performance of fiber optic gyroscope (FOG) to meet the serious working environment. A new test method was introduced to make reasonable assessment on the dynamic performance of FOG. The principle of this new test method was that the sine wave provided by the IP core in FPGA was superimposed on the digital ladder to simulate the input signal of sway motion. It could be proved that the serial of sine signal, which was generated by this method, was equivalent to the external input signal. Moreover, the dynamic error model of FOG was established to provide the theory of dynamic test. The results of dynamic test of FOG indicated that the dynamic error did not have divergent trends, the system parameters set was reasonable and the FOG system was stable. It also can be seen that dynamic error of FOG was increased with the increasing of sine wave amplitude, which was accord with the actual situation. The new dynamic test method of FOG was verified.

An ENOB Evaluation Method for an Acquisition Channel

2019 ◽  
Vol 28 (11) ◽  
pp. 1950185
Author(s):  
Xin Liu ◽  
Yan Liu ◽  
Zengshou Dong
Keyword(s):  
Evaluation Method ◽  
Golden Section ◽  
Dynamic Performance ◽  
Performance Testing ◽  
Sine Wave ◽  
Least Square ◽  
Test Method ◽  
Single Tone ◽  
Fitting Procedure ◽  
Dc Component

Three-parameter and four-parameter sine-wave fitting algorithms are powerful tools for estimating the parameters of the excited single-tone sine-wave for ADC. In the dynamic performance testing processes of instruments, the angle frequency, amplitude, phase and dc component of the input sine-wave are all unknown, so the fitting procedure is nonlinear. This paper proposes and analyzes a test method based on iteration Interpolated Discrete Fourier Transform (IpDFT) and sine-wave fitting method for evaluating the effective number of bit (ENOB) of the acquisition channel. Mathematical expressions of the Least-square fitting residual error and the proposed ENOB evaluation based on iteration IpDFT method are derived. These expressions are then particularized for acquisition circuit output noise composed of single-tone and additive white noise. Simulation results show that the DFT-based golden section searching algorithm (DGSSA) is an effective algorithm under coherent and non-coherent sampling conditions. The accuracy of the derived expressions and estimated parameters are verified through both the computer simulations and experimental results.

Influence of the Gap between Measuring Head and Tested Object on the Results of an Eddy Current Test Method

2014 ◽  
Vol 223 ◽  
pp. 246-254 ◽  
Author(s):  
Andrzej Zbrowski ◽  
Wojciech Jóźwik
Keyword(s):  
Defect Detection ◽  
Eddy Current ◽  
Roller Bearing ◽  
Sine Wave ◽  
Test Method ◽  
Measuring Head ◽  
Measuring Device ◽  
Tapered Roller Bearing ◽  
Bearing Ring ◽  
Current Test

The article presents the influence of the distance between a measuring head and a tested object on the results of eddy current defectoscopy test. The tests were conducted on the two inner rings of a tapered roller bearing where the test defects were performed. A one-millimetre hole corresponded to the surface defect. Internal blind holes in the shape of a rectangle corresponded to a subsurface defect. The research was performed with the use of a SSEC III PC defectoscope connected to a mobile PC. The measuring device is part of the system for the automatic quality control of bearing rings. The test was conducted for a slit having following dimensions: 0.1, 0.2, 0.3, 0.4, and 0.5 mm. The obtained characteristics are the composition of the pulse caused by the detected defect and the sine wave caused by the axial runout of the tested bearing ring. The correlation between the slit size and the value of the signal of the defect and the sine wave caused by axial runout of the tested ring was observed. The concept of “a coefficient of defect detection” was introduced. The described coefficient is a quotient of the value of the defect signal and the peak-to-peak value of the sine wave caused by axial runout of the tested bearing ring. The increase in the dimensions of the slit from 0.1 to 0.5 mm causes a 35 - 50% decrease in the coefficient of defect detection, depending on the test defect. A handle was designed to ensure a constant pressure of measuring head on the tested surface was proposed.

Effects of sine wave contexts on compensation for coarticulation

2009 ◽  
Author(s):  
Navin Viswanathan ◽  
James S. Magnuson ◽  
Carol A. Fowler
Keyword(s):  
Sine Wave

Metrological support of individual blood glucose meters in telemedicine

2019 ◽  
pp. 52-56
Author(s):  
Yu.F. Glukhov ◽  
N.V. Krutikov ◽  
A.V. Ivanov ◽  
N.P. Muravskaya
Keyword(s):  
Blood Glucose ◽  
Blood Glucose Level ◽  
Glucose Level ◽  
Measurement Data ◽  
Test Method ◽  
Level Measurement ◽  
Measurement Devices ◽  
Real Practice ◽  
Health Care Centers ◽  
Medical Measurement

We have studied and analyzed status and metrological supervision of blood glucose monitors, individual devices for a person’s blood glucose level measurement. It has been indicated that nowadays blood glucose monitors like other individual devices for medical measurement are not allowed to be involved in telemedicine public service. This accounts for absence of metrological supervision with these measurement devices in telemedicine. In addition, the key problem is absence of safe methods and means of remote verificaition, calibration and transmission of measurement data to health care centers. The article offers a remote test method for blood glucose monitors using a number of resistors with values correlating with measured blood glucose level. The available method has been successfully trialed in real practice.

Customer’s satisfaction on service quality at Vietnam Technological and Commercial Joint Stock Bank – An Giang Branch

2020 ◽  
Vol 4 (3) ◽  
pp. First
Author(s):  
Tran Minh Hieu ◽  
Nguyen Duong Ngoc Mai Chi
Keyword(s):  
Customer Satisfaction ◽  
Service Quality ◽  
Test Method ◽  
Quality Of Services ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Alpha Reliability ◽  
Survey Results ◽  
Development Orientation

This study applied SERVQUAL scale of Parasuraman et al to measure factors affecting customer satisfaction on service quality at Vietnam Technological and Commercial Joint Stock Bank - An Giang Branch (Techcombank An Giang). The study was conducted to survey 207 customers who have been using the service at Techcombank An Giang. The survey results were analyzed by the Cronbach's Alpha reliability test method, then used Exploratory factor analysis (EFA) to verify and evaluate the scale of service quality. The results of the regression analysis show that customer's satisfaction about service quality at Techcombank An Giang includes four factors: The factor with the highest level is the Empathy with Beta = 0.253, the second of factor is the Responsibility with Beta = 0.248, ranked third in the influence level is the Tangible with Beta = 0.235, and the lowest impact level is the Reliability with Beta = 0.144. The research also uses statistical methods to describe and test the differences of demographic factors with customer's satisfactionon service quality.The analysis results show that there is no difference between customer's satisfaction on service quality and factors such as gender, age, income, number of transaction banks, regular transaction banks, and time to use the service at Techcombank An Giang. Through the research results, the author would like to propose some ideas to improve the quality of services, thereby attracting new customers and importantly, keeping traditional customers because the development orientation of Techcombank is to take care of old customers to cross sell other products of the bank. The Stud results offer a basis for the branch to identify the factors influencing customer satisfaction on their service quality, thereby having an appropriate strategy to improve customer satisfaction.

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