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Vortex flowmeter

A flowmeter and eddy current technology, which is applied in the field of operating vortex flowmeters and can solve problems such as affecting the quality of measurement results.

Active Publication Date: 2012-09-19
KROHNE MESSTECHNICK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] [03] Since the determination of the flow velocity in a vortex flowmeter is based on the measurement of pressure fluctuations, the vortex flow measurement is sensitive to vibrations in the entire device, which can thus affect the quality of the measurement results

Method used

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Embodiment Construction

[0032] [32] Figure 1a to 1d A vortex flowmeter 1 with a measuring tube 2 and a housing 3 is shown. In the measuring tube 2, a bluff body 4 extending through the entire diameter in this embodiment is centrally arranged in the flow channel 5 of the measuring tube 2. When the medium flows in the flow channel 5, the bluff body 4 causes vortex formation at the side of the bluff body 4, wherein the frequency of the vortex can be detected by the sensor unit 6 and an eddy current measurement signal is formed according to the vortex frequency. In this embodiment, the sensor unit 6 is composed of a piezoelectric element and is continuously fixed to the bluff body 4 on the side facing away from the flow direction.

[0033] [33] In order to detect the disturbance vibration acting on the vortex flowmeter, according to Figure 1a An inertial sensor 7 is additionally provided in the embodiment to detect interference vibration. according to Figure 1a , The inertial sensor 7 is an acceleration s...

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Abstract

Vortex flowmeter (1) having a measuring tube (2), a housing (3), a bluff body (4) and a sensor unit (6), wherein the sensor unit (6) serves to detect a vortex measuring signal caused by the bluff body (4). A vortex flowmeter (1) with which the quality of the measuring results is increased is implemented in that, additionally, at least one inertial sensor (7) is provided for detecting parasitic oscillations acting on the vortex flowmeter (1).

Description

Technical field [0001] [01] The present 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 the eddy current measurement signal caused by the bluff body. Furthermore, the present invention relates to a method for operating a vortex flow meter having a sensor unit and at least one inertial sensor. Background technique [0002] [02] Vortex flow meters have been known for a long time, in which the measurement principle is based on the fact that in a fluid or gas medium, a vortex street is formed after the bluff body circumvented by the medium, which passes through the bluff body that moves forward with the flow and separates from the bluff body. Swirl formation. The frequency of the separation of the vortex and 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 frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/32
CPCG01F1/329G01F1/3287
Inventor K·戈斯纳
Owner KROHNE MESSTECHNICK GMBH & CO KG