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Vortex flowmeter and method of operation thereof

A flowmeter and eddy current technology, applied in the field of operating vortex flowmeters, can solve problems such as vibration sensitivity and affect the quality of measurement results, and achieve the effect of improving quality

Active Publication Date: 2016-12-14
KROHNE MESSTECHNICK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the determination of the flow velocity in vortex flowmeters is based on the measurement of pressure fluctuations, vortex flow measurement is sensitive to vibrations in the entire plant, which can thus affect the quality of the measurement results

Method used

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  • Vortex flowmeter and method of operation thereof
  • Vortex flowmeter and method of operation thereof
  • Vortex flowmeter and method of operation thereof

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Embodiment Construction

[0032] Figures 1a to 1d A vortex flowmeter 1 with a measuring tube 2 and a housing 3 is shown. Inside the measuring tube 2 , a bluff body 4 extending over the entire diameter in the exemplary embodiment is arranged centrally in the flow channel 5 of the measuring tube 2 . When the medium flows in the flow channel 5 , the bluff body 4 induces eddy formation at the sides of the bluff body 4 , wherein the frequency of the vortex is detectable by the sensor unit 6 and a vortex measurement signal is formed depending on the vortex frequency. In this exemplary embodiment, the sensor unit 6 is formed by a piezoelectric element and is permanently fastened thereto on the side of the bluff body 4 facing away from the direction of flow.

[0033] In order to detect disturbing vibrations acting on the vortex flowmeter, according to Figure 1a In the exemplary embodiment of the present invention, an inertial sensor 7 is additionally provided for detecting disturbing vibrations. according ...

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Abstract

The invention relates to a vortex flowmeter (1), which has a measuring tube (2), a housing (3), a bluff body (4) and a sensor unit (6), wherein the sensor unit (6) is used for measuring (4) The induced eddy current measurement signal. The vortex flowmeter (1) is realized by additionally providing at least one inertial sensor (7) for detecting disturbing vibrations acting on the vortex flowmeter (1), wherein the quality of the measurement results is increased.

Description

technical field [0001] The invention relates to a vortex flowmeter, which has a measuring tube, a housing, a bluff body and a sensor unit, wherein the sensor unit is used to detect a vortex measurement signal caused by the bluff body. Furthermore, the invention relates to a method for operating a vortex flowmeter having a sensor unit and at least one inertial sensor. Background technique [0002] Vortex flowmeters have been known for a long time, the measuring principle being based on the fact that in a fluid or gaseous medium a vortex street forms behind a bluff body surrounded by the medium, which is formed by vortices detached from the bluff body advancing with the flow. The frequency at which the vortex separates from the bluff body is related to the flow velocity, and the correlation is approximately linear under certain preconditions. In any case, the measurement of the vortex frequency is a suitable means for determining the flow velocity of the medium, so that indir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/32
CPCG01F1/3287
Inventor K·戈斯纳
Owner KROHNE MESSTECHNICK GMBH & CO KG