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Device for determining and/or monitoring a prescribed fill level

An equipment and material level technology, which is applied to the equipment field of at least one material level, can solve the problems of unknown measuring devices, defective measurement results, etc., and achieve the effect of improving safety

Active Publication Date: 2013-04-10
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of highly viscous or degassed media, electronic vibrating limit switches may give flawed measuring results
No measuring device equally suitable for all these applications has hitherto been known

Method used

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  • Device for determining and/or monitoring a prescribed fill level
  • Device for determining and/or monitoring a prescribed fill level

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] figure 1 A container 5 is shown which is partially filled with a liquid medium 6 and has four different measuring devices for monitoring the filling level. Shown therein are a conductivity sensor 11 for capacitive or conductive measurement, a capacitive sensor 12 , a flush sensor 13 , and a vibrating fork 14 representing an electronic vibratory measuring device. In each case, the measuring devices 11 , 12 have a detection unit 2 which protrudes from above inwardly into the container 5 . Electronic components such as the control / evaluation unit 25 are housed in the sensor head which remains outside the container. The detection unit 2 of the flush-mounted sensor 13 installed laterally in the container ends flush with the wall of the container 5 , so that only the surface emerges from the interior of the container 5 . Each detection unit 2 has one or more electrodes and is used for capacitive or conductive filling level recording. Such measuring devices are known from t...

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PUM

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Abstract

The invention relates to a device for determining and / or monitoring at least one fill level of a medium in a tank, at least comprising a capacitive or conductive probe unit having at least one electrode, and a control / evaluation unit. According to the invention, the electrode is a hollow body, an end region of the electrode that protrudes into the tank is designed as a vibrating membrane, a driving / receiving unit is disposed on the inner face of the membrane, wherein said driving / receiving unit excites mechanical vibrations in the membrane and receives mechanical vibrations from same and converts said vibrations into an electrical received signal, and the control / evaluation unit applies a voltage to the electrode at least periodically and capacitively or conductively determines the fill level of the medium, and / or the control / evaluation unit applies an excitation signal to the driving / receiving unit at least periodically, and determines the fill level of the medium from the received electrical signal.

Description

technical field [0001] The invention relates to a device for determining and / or monitoring at least one filling level of a medium in a container. The device comprises at least: a capacitive or conductive detection unit with at least one electrode; and a control / evaluation unit. Background technique [0002] In order to determine or monitor the limit level of a medium in a container, various measuring devices are known which operate according to different measuring principles, the choice of the measuring device depending on the respective field of application. For example, for conductive liquids, it is preferable to use a conductivity sensor, in which case the resistance between a rod-like electrode provided in the container and the wall of the container is measured. However, conductivity measurements are difficult or even impossible for media with low conductivity. In the case of non-conductive liquids, capacitive sensors are often used which likewise have one or more elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296G01F23/24G01F23/26
CPCG01F23/24G01F23/268G01F23/2968G01F23/265G01F23/2967G01N11/16G01N2009/006G01F25/20G01F23/266
Inventor 马丁·乌尔班赫尔穆特·普法伊费尔福尔克尔·德赖尔
Owner EHNDRESS KHAUZER GMBKH KO KG
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