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Measuring system for a medium flowing in a process line

A measurement system, a technology of flow measurement, which is applied in detecting the dynamic effect of fluid flow, liquid/fluid solid measurement, and determining specific gravity by measuring pressure difference, which can solve the problems of no longer measurement accuracy and other problems

Active Publication Date: 2010-06-09
ENDRESS HAUSER FLOWTEC AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Correspondingly, for the aforementioned configurations, at flow velocities significantly less than 10 m / s, the sought-after measurement accuracy of about 0.1% to 0.5% can no longer be achieved

Method used

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  • Measuring system for a medium flowing in a process line
  • Measuring system for a medium flowing in a process line
  • Measuring system for a medium flowing in a process line

Examples

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Embodiment Construction

[0104] figure 1 A measuring system 1 is schematically shown, which can be constructed modularly and is suitable for at least intermittently and very precisely and also very robustly determining the density of a medium flowing in a process line 20 and for converting the density (if necessary in real time ground) to corresponding reliable, e.g. digital, density measurements X ρ , the medium here can also be a two-phase or multiphase medium, such as gas, liquid (which may contain gas and / or solid particles), gas containing solid particles and / or liquid droplets, steam (which may be saturated steam or dry steam ),wait. Examples of media include gases such as hydrogen, nitrogen, chlorine, oxygen, helium or complexes and / or mixtures thereof, such as, water, phosgene, air, natural gas or other hydrocarbons.

[0105] In particular, measuring systems are used to measure very precisely the density of flowing media in which the thermodynamic state is variable along the measuring system...

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Abstract

The invention relates to a measuring system for measuring a density of a medium flowing in a process line, said medium being variable regarding its thermodynamic state, along an imaginary axis of flow of the measuring system. The measuring system comprises at least one temperature sensor that primarily reacts to a local temperature, theta, of a medium flowing past, at least one pressure sensor that primarily reacts to a local pressure, p, of a medium flowing past, at least one flow sensor that is located in a flow measuring point and that primarily reacts to a local flow parameter of the medium to be measured, and at least one electronic measuring unit that at least temporarily communicates with at least the temperature sensor, the pressure sensor and the flow sensor. The electronic measuring unit generates at least temporarily at least one density value that momentarily represents a local density, Rho, which the flowing medium has in a virtual density measuring point, using the temperature measurement signal, the pressure measurement signal and the flow measurement signal.

Description

technical field [0001] The invention relates to a measuring system for measuring the density of a medium flowing in a process line with a temperature sensor, a pressure sensor and measuring electronics, the medium being variable in terms of its thermodynamic state along a virtual flow axis of the measuring system , in particular at least partially compressible, the measuring electronics at least intermittently communicates with the temperature sensor and the pressure sensor and at least intermittently produces at least one density measurement which represents the local density of the flow medium as precisely as possible. Background technique [0002] In order to detect a measured variable (such as a thermodynamic state variable, density, or a measured variable derived therefrom) that describes the action of the process in a flowing medium, and to generate a measured value correspondingly representative of this measured variable, in industrial process measurement technology, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/32G01N9/26
CPCG01F1/3209G01N9/266
Inventor 赖纳·赫克尔
Owner ENDRESS HAUSER FLOWTEC AG
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