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Method for determining the volumetric flow rate of a fluid medium through a measuring section and associated measuring device

A technology of flow medium and volume flow, which is applied in the direction of measuring flow/mass flow, measuring device, liquid/fluid solid measurement, etc., and can solve problems such as unrealistic processing

Inactive Publication Date: 2017-03-22
DIEHL METERING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the flow medium may change during the ongoing operation, corresponding treatment cannot be achieved

Method used

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  • Method for determining the volumetric flow rate of a fluid medium through a measuring section and associated measuring device
  • Method for determining the volumetric flow rate of a fluid medium through a measuring section and associated measuring device
  • Method for determining the volumetric flow rate of a fluid medium through a measuring section and associated measuring device

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Embodiment Construction

[0033] figure 1 and figure 2 Shown is a measuring device 1 for determining the gas-type-independent volume flow of a flow medium. here, figure 1 A schematic view of the measuring device 1 is shown from above, while figure 2 A perspective view of the measuring device is shown. exist figure 1 and 2 The flow medium 2 schematically indicated by arrows flows through the measuring path of the measuring device 1 . The flow medium 2 is guided here in layers in a measuring channel, not shown, which is formed by a tube with a substantially rectangular cross section. Here, the flow medium 2 passes the heating element 4 , the first temperature sensor 5 arranged downstream of the heating element 4 and the second temperature sensor 6 spaced apart from the heating element 4 at a greater distance than the first temperature sensor 5 . The heating element 4 and the temperature sensors 5 , 6 are designed here as wires which run exposed between the two base bodies 3 through the measuring...

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Abstract

Disclosed is a method for determining the volumetric flow rate of a fluid medium through a measuring section in a substantially gas-type independent manner, said method comprising the following steps: pulsed heating of the medium by means of a heating element; recording a first time at which a maximum temperature occurs at a first temperature sensor lying upstream or downstream from, and adjacent to, the heating element; recording a second time at which a maximum temperature occurs at a second temperature sensor lying downstream of the heating element, wherein the second temperature sensor is located further away from the heat source than the first temperature sensor; calculating a time difference between the first and the second time; and determining the volumetric flow rate on the basis of the time difference.

Description

technical field [0001] The invention relates to a method for determining the volume flow of a flow medium through a measuring path. Background technique [0002] Determining the volume flow of a flowing medium is important for many technical applications. In particular, a price for the relevant gas quantity can be determined on the basis of the volume flow measured in this way. A disadvantage here is that with known (in particular thermal) methods for determining the volume flow, the volume flow is determined as a function of the gas parameters of the flow medium. If the respective method is applied to an always identical gas or a substantially constant gas composition, then the gas parameter is taken into account, namely the measurement path used for calibration to the respective medium. However, if the type or composition of the flow medium changes, this procedure leads to significant measurement errors when determining the volume flow. [0003] No. 5,347,876 discloses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/688G01F1/7084
CPCG01F1/688G01F1/7084G01F1/7044G01N25/18
Inventor C·佐纳U·哈默施密特
Owner DIEHL METERING