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Apparatus for determining and/or monitoring at least one process variable

A process variable, electromagnetic oscillation technology, used in measuring devices, liquid/fluid solids measurement, specific gravity measurement, etc.

Active Publication Date: 2020-03-13
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, in the case of this procedure, the dependence of the viscosity on the density of the medium must be considered

Method used

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  • Apparatus for determining and/or monitoring at least one process variable
  • Apparatus for determining and/or monitoring at least one process variable
  • Apparatus for determining and/or monitoring at least one process variable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] figure 1 A device 1 in the form of an electronic vibration sensor 1 for determining and / or monitoring at least one process variable is shown. A mechanically oscillatable unit 4 in the form of an oscillating fork is shown, which is partially immersed in the medium 2 located in the container 3 . The following description focuses on the mechanically oscillatable unit 4 in the form of an oscillating fork. However, there is no intention to limit the general applicability of the invention.

[0056] Especially for embodiments in which at least one electromagnetically oscillatable unit 7 is arranged at least partially within the mechanically oscillatable unit 4 , it is advantageous to manufacture at least two tines of the mechanically oscillatable unit 4 in plastic form of synthetic material.

[0057] The oscillatable unit 4 is excited by means of a drive / receiver unit 5 to perform a mechanical oscillation. For example, the driving / receiving unit 5 may be a piezoelectric sta...

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PUM

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Abstract

The invention relates to a device for determining and / or monitoring at least one process variable of a medium (2) in a container (3), comprising: a mechanically oscillatable unit (4); a driving / receiving unit (5) for exciting the mechanically oscillatable unit (4) to perform mechanical oscillation by means of an electrical excitation signal and receive the mechanical oscillation and convert the mechanical oscillation into an electrical reception signal; the control unit (12) is implemented to generate an exciter signal according to the reception signal and adjust the relationship between the exciter signal and the reception signal Predeterminable phase shift between; electromagnetic oscillating unit (7); active element (13), used for generating and / or maintaining electromagnetic oscillation in electromagnetic oscillating unit (7), active element and electromagnetic oscillating unit ( 7) together form an oscillator; a coupling unit (14), implemented to tap the output signal from the active element (13); and an evaluation unit (15), which is implemented to receive the signal from and / Or the output signal determines at least one process variable.

Description

technical field [0001] The invention relates to a device for determining and / or monitoring at least one process variable of a medium. Background technique [0002] Depending on the process variable to be determined, corresponding field devices of process technology and / or automation technology are based on many different principles known per se from the prior art. In this case, certain field devices are able to record individual process variables or in particular a number of process variables simultaneously. However, generally speaking, for the comprehensive characterization of the properties of the medium, especially the physical properties and / or chemical properties, multiple field devices must be used in parallel. [0003] A field device usually comprises at least one sensor element, which is at least partially present directly or indirectly and which is at least sometimes in contact with the process, and an electronics unit, for example, for signal recording, signal eva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284G01F23/296G01N9/00
CPCG01F23/284G01N2009/006G01N9/002G01N11/16G01F23/2966G01N33/03G01N33/2847G01N27/02
Inventor 托马斯·布勒德特托比亚斯·布伦加藤纳本雅明·马克彼得·克勒费尔
Owner EHNDRESS KHAUZER GMBKH KO KG