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Fill level measuring device for determining and monitoring the fill level of a medium in the process space of a container by microwave transit time measurement

A technology of time measurement and microwave propagation, applied in measuring devices, measuring electrical variables, radio wave measuring systems, etc., can solve problems such as leakage, synthetic materials and sealing elastomers are not durable, aging, etc.

Active Publication Date: 2016-06-01
EHNDRESS KHAUZER GMBKH KO KG
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Problems solved by technology

[0010] A disadvantage in the case of the process isolating element shown in the prior art is that the synthetic material and the sealing elastomer of the process isolating element are not durable in the temperature range >200°C and age very quickly as the temperature increases, The result is leakage problems

Method used

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  • Fill level measuring device for determining and monitoring the fill level of a medium in the process space of a container by microwave transit time measurement
  • Fill level measuring device for determining and monitoring the fill level of a medium in the process space of a container by microwave transit time measurement
  • Fill level measuring device for determining and monitoring the fill level of a medium in the process space of a container by microwave transit time measurement

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Embodiment Construction

[0031] figure 1 A fill level measuring device 1 is shown which works according to the transit time measurement method for determining the fill level F of the medium 19 . As shown, the filling level measuring device 1 is installed on the nozzle of the container 17 . The shown filling level measuring device 1 consists of a radiating element 5 , in particular a horn antenna, and a measuring transmitter 21 , which radiate microwaves freely into the process space. The measuring transmitter 21 comprises: at least one transmitting / receiving unit, which generates the transmission signal S and receives the reflected signal R of the microwave signal 2; a control / evaluation unit, which is used for signal processing of the microwave signal 2 and for controlling the level measuring device 1 and, a communication unit, which controls the communication via the bus system and the energy supply of the filling level measuring device 1 . In this example of embodiment, for example, the radiation...

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Abstract

A fill-level measuring device for ascertaining and monitoring fill level of a medium located in the process space of a container by means of a microwave travel time measuring method. The device comprises a measurement transmitter and an antenna unit, which is constructed at least of a hollow conductor and a radiating element A microwave transmissive, process isolating element is inserted for process isolation into the hollow conductor between the measurement transmitter and the horn shaped radiating element contacting the process space. The process isolating element is embodied as a hollow body having at least one tubular hollow body region matched to the shape of the hollow conductor, and a pointed hollow body region neighboring the hollow body region in the direction of the radiating element and having a wall thickness selected based on reflection, or lack thereof, of the microwave signals.

Description

technical field [0001] The invention relates to a fill level measuring device for determining and monitoring the fill level of a medium in the process space of a container by means of a microwave propagation time measurement method. The device comprises a measuring transmitter and an antenna unit consisting at least of a hollow conductor and a radiating element, wherein for process isolation a process isolating element of the microwave transmission type is inserted in the hollow between the measuring transmitter and the horn-shaped radiating element contacting the process space conductor. [0002] The assignee works in the field of industrial automation and process control technology and manufactures industrial measuring devices, also called field devices. It sells these field devices, for example for level determination of media in containers. These devices include those sold under the trademarks Micropilot, Levelflex and Deltapilot, among others. Background technique ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/284
CPCG01F23/284G01S7/03G01S13/88H01Q1/225H01Q13/02H01Q19/08G01N22/00G01R27/32
Inventor 陈琪埃里克·贝格曼克劳斯·法伊斯特
Owner EHNDRESS KHAUZER GMBKH KO KG
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