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Method and device for measuring weighting function of electromagnetic flowmeter

An electromagnetic flowmeter and weight function technology, applied in measuring devices, test/calibration devices, liquid/fluid solid measurement, etc., can solve the problems of inaccurate calculation results, complex mathematical derivation and calculation ability, etc.

Inactive Publication Date: 2010-06-09
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These simplifications will inevitably introduce additional errors, resulting in inaccurate calculation results
In addition, the above-mentioned complex mathematical derivation and calculation ability are not available to everyone

Method used

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  • Method and device for measuring weighting function of electromagnetic flowmeter
  • Method and device for measuring weighting function of electromagnetic flowmeter
  • Method and device for measuring weighting function of electromagnetic flowmeter

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Experimental program
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Embodiment Construction

[0018] Such as figure 1 As shown, one end of the electromagnetic flowmeter pipe section 1 is sealed through the sealing flange 4, and filled with water after being placed upright, and a positive and negative inverted rectangular wave electric signal is added to the electrodes 2 and 3 of the electromagnetic flowmeter by using the excitation module 12. An alternating current field will be formed in the pipe section, and the current density in the current field with the electromagnetic flowmeter weighting function have the same distribution characteristics. The computer 14 drives the current density meter probe 5 to measure the current density at a certain point through the existing three-dimensional positioning mechanism products composed of x, y, and z linear electric displacement stages 8, 9, and 10. Simultaneously by ammeter 13, measure the current total amount I that flows through on the electrode at this moment, utilize relational expression at last Calculate the val...

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Abstract

The invention provides an electromagnetic flow meter weighting function measuring method and the device. The device comprises a current density meter probe, a current density meter, a motion controller, a stimulating module, an ammeter, a three dimensional location mechanism and a computer. One end of the electromagnetic flow meter pipe is sealed, and the pipe should be erected vertically and filled with water. A square wave electric signal the positive and the negative of which are overturned will be added on the electrode of the electromagnetic flow meter by the stimulating module. The current density j in the produced current field has the same distributing characteristics with the weighting function W of the electromagnetic flow meter. The current density meter probe is driven by thecomputer through the three dimensional location mechanism to measure the current density j on a certain point, and at the same time, the total current amount I flowed at the moment can be measured bythe ammeter, and at last the weighting functional value on the point can be calculated by using the formula that W equals to j divided by I. The device realizes the testing measurement of the electromagnetic flow meter weighting function which is a virtual physical quantity by using electrical simulation method. The device can help and provide convenience for the general designers to understand the micro-properties of the electromagnetic flow meter, and can provide guidance for the design improvement of the electromagnetic flow meter.

Description

technical field [0001] The invention relates to a measuring method and a device applied to an electromagnetic flowmeter, in particular to a measuring method and a device for a weight function of an electromagnetic flowmeter. Background technique [0002] The weight function of the electromagnetic flowmeter is a fictitious physical quantity. Its physical meaning is: when the electromagnetic flowmeter is working, it measures the contribution of the induced electromotive force generated by each point in the pipe space to the output voltage between the electrodes. Scientists have made a clear definition of the numerical value of the weight function of a certain point in the pipe space measured by the electromagnetic flowmeter, that is, when the unit current flows through two electrodes to form a current loop, the current density of the point. Therefore, there are also many literatures that refer to the weight function as virtual current. The acquisition of weight function distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
Inventor 付新胡亮邹俊叶朋
Owner ZHEJIANG UNIV
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