Method and device for measuring a volume flow of a liquid flowing into a container and/or a volume of the liquid having flowed into the container

A technology of volume flow and inflow liquid, applied in volume measurement instruments/methods, measuring flow/mass flow, detecting fluid flow by measuring differential pressure, etc. Apply a wide range of effects

Active Publication Date: 2013-03-13
ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these sensors are expensive and come in direct contact with the liquid
The latter feature poses a risk of contamination of both the sensor and also the liquid

Method used

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  • Method and device for measuring a volume flow of a liquid flowing into a container and/or a volume of the liquid having flowed into the container
  • Method and device for measuring a volume flow of a liquid flowing into a container and/or a volume of the liquid having flowed into the container
  • Method and device for measuring a volume flow of a liquid flowing into a container and/or a volume of the liquid having flowed into the container

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Experimental program
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Embodiment Construction

[0079] figure 1 The device of the present invention for measuring the volume flow dV(t) / dt of the liquid flowing into the container 1 and / or the volume V(t) of the liquid having flowed into the container 1 is shown.

[0080] The device includes a liquid supply system 5 connected to a filling opening 3 of the container 1, which opens into the interior of the container 1. The liquid supply system 5 is used to supply liquid to the container 1. The supply system 5 includes at least one storage unit 7, 9 filled with spare liquid A, B. The storage units 7, 9 are, for example, supply containers containing various liquids to be analyzed or they contain supplementary liquids required for analysis, such as reagent solutions. Liquids A, B can be contained in storage units 7, 9, for example, the storage units 7, 9 are in the form of a flexible gas and liquid impermeable volume, such as a bag of plastic foil or film such as polyethylene or polypropylene. The storage units 7, 9 are preferabl...

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Abstract

The invention relates to a method and device for measuring a volume flow (dV(t) / dt) of a liquid (A, B) flowing into a container (1) and / or a volume (V(t)) of the liquid (A, B) having flowed into the container (1), by means of which a high degree of automation can be achieved in microfluidic systems, in particular in the field of analysis, wherein a gas is confined in the container (1) at a prescribed initial volume (V0) and at an initial pressure (p0) prior to the inflow of the fluid (A, B), the fluid (A, B) subsequently flowing into the container (1) compresses the confined gas to a gas volume that is a function of the volume (V(t)) of the liquid having flowed in and causes an increase in gas pressure (pG) of the gas in the container (1) relative to the initial pressure (PG), which is a function of the volume (V (t)) that has flowed in and the volumetric flow rate (dV(t) / dt); of the inflow, the gas pressure (pG) in the container is measured as a function of time (t), and the volume (V(t)) having flowed in up to time (t) and / or the volumetric flow rate (dV(t) / dt) of the inflow at time (t) is determined using the measured gas pressure (pG).

Description

Technical field [0001] The invention relates to a method for measuring the volumetric flow rate of liquid flowing into a container and / or the volume of liquid flowing into the container, and a device for performing the method. [0002] The present invention can be applied in all fields of industrial measurement technology, medicine and laboratory technology, in which liquids are transported, dosed or metered in a controlled manner, especially with the aid of microfluidic systems, or can be applied to micro-method technologies. In the field. This is especially true in the field of liquid analysis. Examples of such areas include analytical systems for monitoring and optimizing the cleaning efficiency of purification plants, for drinking water monitoring, for monitoring biotechnological processes, or for quality monitoring of liquids or foods for industrial applications. For example, the content of a liquid sample of substances such as ions, such as, for example, ammonium, phosphat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F13/00B01F15/04G05D11/00G05D11/13B01F13/00
CPCG01F13/00G01F1/34G01F22/02G01F3/38
Inventor 迈克尔·汉克斯特法尼·霍切尔
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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