The Effect of Abscission of Insulation Lining of Electromagnetic Flowmeter on Output Signal

2012 ◽  
Vol 226-228 ◽  
pp. 1910-1915
Author(s):  
Song Gao ◽  
Bin Li ◽  
Shi Yi Yin ◽  
Xue Jing Li
Keyword(s):  
Output Signal ◽  
Short Circuit ◽  
Electromagnetic Flowmeter ◽  
Fluid Temperature ◽  
Flow Meter ◽  
Electromagnetic Flow ◽  
Electromagnetic Flow Meter ◽  
Pressure Changes ◽  
Relationship Of ◽  
The Relationship

In pipe of electromagnetic flowmeter must be installed internal insulation lining to prevent the electromagnetic flowmeter signal is short circuit by metal pipe. However, in the process of using the electromagnetic flow meter, insulation lining is easy to fall off because of the fluid temperature and pressure changes, thus lead to the output signal of the electromagnetic flowmeter is changed. The effect of electromagnetic flowmeter insulation lining fall off to the output signal is analyzed by the theory of electromagnetic flow meters weight function. Get the relationship of the output signal and the insulation lining drop area and position. The paper provides a theoretical analysis method for the effect abscission of insulation lining of electromagnetic flow meter on output signal.

Research of Electromagnetic Flowmeter with Grounding Electrode

2013 ◽  
Vol 712-715 ◽  
pp. 1856-1862
Author(s):  
Song Gao ◽  
Bin Li ◽  
Shi Yi Yin
Keyword(s):  
Weight Function ◽  
Output Signal ◽  
Electromagnetic Flowmeter ◽  
Weight Functions ◽  
Flow Meter ◽  
Electrode Area ◽  
Electromagnetic Flow ◽  
Measurement Signal ◽  
Grounding Electrode ◽  
Electromagnetic Flow Meter

Grounding electrode electromagnetic flowmeter can reduce the loss of the measurement signal,and the conductivity lower medium can be measured if the area of the grounding electrode was increased. However, if the grounding electrode area is increased, the measurement signal will be reduced. The weight function theory of electromagnetic flow meter shows that the reason is the distribution of electromagnetic flow meter weight functions is changed by the grounding electrode, lead to the induced electromotive force every point of media in the pipeline contribution to the measuring electrode is changed. the weight function of the electromagnetic flowmeter which possesses one or two grounding electrodes was analyzed respectively, get the law of electromagnetic flowmeter output signal decreases with the increase of the grounding electrode area. Finally, the relationship of the electromagnetic flowmeter output signal and the ground electrode diameter accounted for measuring the ratio of the pipe been demonstrated. This theory and method has a certain significance to research and development grounding electrode electromagnetic flowmeter.

Multi-Parameters Measurement Based on STM32 ARM of Dual-Excited Electromagnetic Flow Meter in Partially Filled Pipes

2013 ◽  
Vol 347-350 ◽  
pp. 682-685
Author(s):  
Ji Suo ◽  
Chun Qing Qi ◽  
Hong Bing Zhang
Keyword(s):  
Theoretical Analysis ◽  
Flow Velocity ◽  
Electromagnetic Flowmeter ◽  
Liquid Level ◽  
Flow Meter ◽  
Electromagnetic Flow ◽  
Signal Injection ◽  
Electromagnetic Flow Meter ◽  
Parameters Measurement

The dual-excited electromagnetic flowmeter with arc-electrodes in the paper can measures liquid level and flow velocity. A pair of electrodes is set as signal injection electrodes on the pipe bottom. AC signal injected used to determine liquid level. The theoretical analysis and experiment results indicate that it is feasible for partially filled pipes.

Electromagnetic Flow Meter Field Distribution Maximizing Device Sensitivity

2016 ◽  
Vol 856 ◽  
pp. 157-162
Author(s):  
Ilona Ilieva Iatcheva ◽  
Andrey Dimitrov Andreev ◽  
Rumena Dimitrova Stancheva ◽  
Ilonka Tityanova Lilyanova
Keyword(s):  
Magnetic Field ◽  
Field Distribution ◽  
Output Signal ◽  
Spline Interpolation ◽  
Magnetic Field Distribution ◽  
Geometrical Parameters ◽  
Flow Meter ◽  
Field Problem ◽  
Electromagnetic Flow ◽  
Electromagnetic Flow Meter

The presented paper deals with determination of the excited magnetic field magnitudes at different points around the device guarantying maximal output signal. Investigated object is electromagnetic flow meter. The output signal is polarization voltage through the circle cross section of the polarization transducer between its electrodes. Except the magnetic field distribution some geometrical parameters of the device and physical characteristic of the inside moving dielectric are varied. The forward field problem is solved by the use of the Comsol, version 5.0 software package. The inverse problem is solved using skills of the Response Surface Methodology (RSM), Design of Experiments (DOE) and Nonlinear Programming. The numerical approach for finding optimal magnetic field distribution is discrete at chosen points. Applying spline interpolation after that the analytical description of the optimal field distribution is defined.

Theory to Help the Use of Electromagnetic Flow Meters

2002 ◽  
Author(s):  
Xiao-Zhang Zhang
Keyword(s):  
Pipe Wall ◽  
Three Dimensional ◽  
Electromagnetic Properties ◽  
Reasonable Accuracy ◽  
Flow Meter ◽  
Flow Meters ◽  
Electromagnetic Flow ◽  
Gas Liquid Flow ◽  
Electromagnetic Flow Meter ◽  
Theory Research

Compared with other flow meters, the theory of electromagnetic flow meter is well developed. Until now, we are able to predict the three dimensional characteristics of this kind of flow meters with reasonable accuracy. This has given much help to the designers to improve the flow meters. On the other hand, the theory can offer a tool for the users of this kind of flow meters to judge the application situations, estimate the possible measurement error, etc. This paper introduces the recent work of the author on the theory of the electromagnetic flow meter. The basic physical conceptions and equations are given with a brief history review of the theory research. Several examples are given of using the theory to analyze the meters’ behavior in different application situations. They are: effect of the conducting pipe connections; errors caused by a pipe wall of different electromagnetic properties; gas-liquid flow and errors caused by a relative motion of the probe.

The Function of the Conus Arteriosus in the Port Jackson Shark, Heterodontus Portusjacksoni

1967 ◽  
Vol 46 (2) ◽  
pp. 373-382
Author(s):  
G. H. SATCHELL ◽  
M. P. JOHNES
Keyword(s):  
Blood Pressure ◽  
Ventricular Ejection ◽  
Flow Meter ◽  
Back Flow ◽  
Electromagnetic Flow ◽  
Ventricular Relaxation ◽  
Ventricular Systole ◽  
Ventral Aorta ◽  
Electromagnetic Flow Meter ◽  
Port Jackson

1. Blood pressure recordings were made above and below each of the three tiers of valves in the conus of Heterodontus portusjacksoni. Flow in the ventral aorta was recorded with an electromagnetic flow-meter. 2. It was shown that the lower conal valves close first and that this closure occurred before the end of ventricular systole. 3. The middle conal valves closed before the lower ones opened. The closure of both of these sets of valves was caused in part by the circumferential decrease due to conus systole, and in part by the back flow this engendered. 4. The upper conal valves closed as the middle ones opened at the end of conal systole. 5. Paralysing the conus with topical tricain rendered the lower and middle conal valves incompetent and caused the upper conal valves to be closed following ventricular relaxation with an increase in back flow. 6. The hypothesis is advanced that the conus serves to postpone the closure of the upper tier of valves until the negative intrapericardial pressure generated by ventricular ejection has decayed to a lower value.

Testing and Improvement of Static Performance of Proximity Sensor for a Mobile Robot

2015 ◽  
Vol 656-657 ◽  
pp. 719-724 ◽  
Author(s):  
Tsing Tshih Tsung ◽  
Nguyen Hoai ◽  
Thi Khanh Vy Tang
Keyword(s):  
Mobile Robot ◽  
Output Signal ◽  
Optimum Operating ◽  
Navigation Systems ◽  
Proximity Sensor ◽  
Static State ◽  
Material Thickness ◽  
Static Performance ◽  
Relationship Of ◽  
The Relationship

In recent years, mobile robot is one of the most interesting topics attracting scientists and factories. With breakthrough techniques in sensor, we can control a mobile robot more reliably. Besides, measuring at static state of the inductive proximity sensor is also necessary since the detective and navigation systems perform more accurately by information from the experiment by analyzing the signal. The purpose of this paper, the hand-made measurement system is used to verify the static performance with the type of aluminium and analyse the relationship between the output signal and the position of the sensor. All we know that the relationship of the static parameters can be determined such as: sensing distance, dimension of material, thickness of material, and so on. The measured data have shown the output signal of proximity sensor in the model and theory which is not identical. The results will provide some information about the different effects of position sensor and optimum operating range of a mobile robot. In addition, by comparing the results achieved, giving solutions to enhance the static performance of the proximity sensor for a mobile robot, such as: choosing of material thickness ranges which is suitable for the operation of a mobile robot, setting the proper sensing distance to be the most stable. This research aims to provide a secure and accurate signal for the control of mobile robots.

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