EP1325289A1 - Appareil pour mesurer un niveau de remplissage - Google Patents

Appareil pour mesurer un niveau de remplissage

Info

Publication number
EP1325289A1
EP1325289A1 EP01965161A EP01965161A EP1325289A1 EP 1325289 A1 EP1325289 A1 EP 1325289A1 EP 01965161 A EP01965161 A EP 01965161A EP 01965161 A EP01965161 A EP 01965161A EP 1325289 A1 EP1325289 A1 EP 1325289A1
Authority
EP
European Patent Office
Prior art keywords
transmitting
receiving elements
antenna
microwaves
filling material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01965161A
Other languages
German (de)
English (en)
Inventor
Roland Müller
Wolfram LÜTKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP1325289A1 publication Critical patent/EP1325289A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves

Definitions

  • the invention relates to a level measuring device working with microwaves for measuring a level of a filling material in a container with a microwave generator and an antenna with a planar antenna structure, which serves to transmit the microwaves in the direction of the filling material and to receive microwaves reflected on a surface of the filling material.
  • a transit time of the microwaves from the device to the product surface and back is usually determined by means of a reception and evaluation circuit, and the instantaneous level is determined therefrom.
  • microwaves are sent to the surface of a medium by means of an antenna and echo waves reflected on the surface are received.
  • An echo function representing the echo amplitudes as a function of the distance is formed, from which the probable useful echo and its transit time are determined.
  • the distance between the product surface and the antenna is determined from the transit time.
  • planar antennas are also in the book 'Introduction to the theory and technology of planar microwave antennas in microstrip line technology' Gregor Gronau, Nellissen-Wolff bookstore or in the journal article 'Impedance of radiation slot in the ground plane of a microstrip line', IEEE Trans.Antennas Propagat ., Vol AP-30, pages 922-926, May 1982.
  • wave packets short microwave transmission pulses, referred to below as wave packets, are transmitted periodically, which are reflected by the product surface and be received again after a distance-dependent runtime.
  • the received signal amplitude as a function of time represents the echo function.
  • Each value of this echo function corresponds to the amplitude of an echo reflected at a certain distance from the antenna.
  • a continuous microwave is transmitted, which is periodically linearly frequency-modulated, for example according to a sawtooth function.
  • the frequency of the received echo signal therefore has a frequency difference compared to the instantaneous frequency that the transmission signal has at the time of reception, which depends on the transit time of the echo signal.
  • the frequency difference between the transmitted signal and the received signal which can be obtained by mixing both signals and evaluating the Fourier spectrum of the mixed signal, thus corresponds to the distance of the reflecting surface from the antenna.
  • the amplitudes of the spectral lines of the frequency spectrum obtained by Fourier transformation correspond to the echo amplitudes. This Fourier spectrum therefore represents the echo function in this case.
  • level measurement with only one antenna arises that a meaningful level measurement is only possible if the level does not fall below a minimum distance from the antenna.
  • This minimum distance which is often also referred to as the block distance, is due to the fact that a received signal caused by the transmission must first have decayed to an amplitude below the echo amplitude before the echo signal reflected from the product surface can be reliably recognized and evaluated.
  • This problem can be largely solved by using two separate antennas, one for transmitting and one for receiving microwaves.
  • This solution requires, however, that there are two openings on the container at a suitable distance through which the two antennas can be inserted. However, this is not the case for most applications.
  • EP-B 592 584 describes a level measuring device working with microwaves
  • an antenna which serves to send the microwaves in the direction of the filling material and to receive microwaves reflected on a filling material surface
  • Crosstalk from the transmitter to the receiver is reduced here by generating linearly polarized microwaves in a first polarization plane and passing them through a phase shifter.
  • the phase shifter is dimensioned so that the emerging microwaves e.g. are left circularly polarized.
  • the right-hand circularly polarized microwaves are then received by the reflection on the product surface and converted into linearly polarized microwaves by means of the phase shifter.
  • the polarization plane of these microwaves is perpendicular to the first polarization plane.
  • the receiver is designed such that it only receives microwaves with this polarization, but does not pick up microwaves polarized along the first polarization plane.
  • the invention consists in a level measuring device working with microwaves for measuring a level of a filling material in a container
  • planar antenna structure has at least two transmitting and / or receiving elements.
  • the transmitting and / or receiving elements are each located in a partial area of the antenna.
  • the transmitting and / or receiving elements are arranged nested in one another.
  • At least one of the transmitting and / or receiving elements is used exclusively as a receiver for measuring a fill level in a close range in front of the antenna.
  • all of the transmitting and / or receiving elements serve as transmitters and receivers for measuring a fill level in a remote area in front of the antenna.
  • At least one transmitting and / or receiving element serves exclusively as a transmitter and the other transmitting and / or receiving elements serve exclusively as a receiver, and a difference signal is determined which is the difference between the transmission signals applied to the transmitters and those received by the receivers Received signals corresponds.
  • the microwaves to be transmitted have frequencies that are greater than 20 GHz.
  • An advantage of the invention is that the antenna provides a very high degree of flexibility due to the planar antenna structure.
  • the antenna structure can be divided at will into several transmitting and / or receiving elements and each transmitting and / or receiving element can be used optimally.
  • a high transmission power is available, for example, for measurements in the long range, and for measurements in the close range, crosstalk from the transmitter to the receiver is significantly reduced by dividing the transmitting and / or receiving elements into pure transmitting elements and pure receiving elements.
  • the only additional effort that is required to use these advantages is a corresponding wiring of the individual transmitting and / or receiving elements. This is easy to do and does not result in any loss of performance.
  • Fig. 1 shows schematically a measuring arrangement with a level measuring device arranged on a container and working with microwaves
  • FIG. 2 shows a schematic illustration of a planar antenna structure which has a first transmitting and / or receiving element and a second transmitting and / or receiving element arranged in another part of the antenna structure;
  • Fig. 3 shows a schematic representation of a planar antenna structure which has two transmission and / or reception elements arranged opposite one another, which are separated from one another by two further transmission and / or reception elements arranged opposite one another;
  • Fig. 4 shows a schematic representation of a planar antenna structure which has a plurality of transmitting and / or receiving elements arranged in a first antenna half and a plurality of transmitting and / or receiving elements arranged in a second antenna half;
  • FIG. 5 shows a schematic representation of a planar antenna structure which has a plurality of transmission and / or reception elements arranged in a chessboard-like manner and nested in one another;
  • FIG. 6 shows a basic circuit diagram of a fill level measuring device according to the invention, in which some transmitting and / or receiving elements operate as transmitters and some transmitting and / or receiving elements operate as receivers;
  • FIG. 7 shows a basic circuit diagram of a fill level measuring device according to the invention, in which a part of the transmitting and / or receiving elements serve exclusively as a transmitter and the other transmitting and / or receiving elements serve exclusively as a receiver for measurements in the close range, and all transmitters are used for measurements in the far range - and / or receive elements serve as transmitters and receivers; and 8 shows a basic circuit diagram of a fill level measuring device according to the invention, in which some transmit and / or receive elements work as transmitters and some transmit and / or receive elements act as receivers and a difference is formed from a transmit signal and receive signal, which are used to determine the fill level becomes.
  • Fig. 1 shows schematically a measuring arrangement with a level measuring device 3 arranged on a container 1 and working with microwaves.
  • the level measuring device 3 is e.g. attached to the container 1 by means of a flange connection.
  • the container 1 is filled with a filling material 5, the filling level of which is to be measured.
  • the fill level measuring device 3 comprises an antenna 7, with a planar antenna structure described in more detail below in connection with the exemplary embodiments shown in FIGS. 2 to 5.
  • the antenna 7 projects into the container 1 and serves to send microwaves in the direction of the filling material 5 and to receive microwaves reflected on a filling material surface.
  • the planar antenna structure has at least two transmitting and / or receiving elements.
  • the fill level measuring device 3 has a microwave generator 9.
  • a suitable microwave generator 9 is e.g. a pulse radar device constructed in planar circuit technology, an FMCW device constructed in planar circuit technology or a continuously oscillating microwave oscillator constructed in planar circuit technology.
  • the microwave generator 9 feeds those transmitting and / or receiving elements which either serve exclusively as transmitters or as transmitters and receivers.
  • Microwaves with frequencies above 20 GHz, for example 24 GHz, are preferably generated and transmitted. Above 20 GHz, the wavelength of the microwaves is sufficiently short to be able to use relatively small planar antenna structures. At 24 GHz, for example, several transmitting and / or receiving elements can be accommodated comfortably on an antenna structure with a diameter of a few centimeters to one or two decimeters. These small dimensions offer the advantage that the Antenna 7 is correspondingly small and can therefore also be easily inserted through container openings of small nominal width.
  • the microwaves are transmitted from the transmitting and / or receiving elements serving as transmitters to the product surface and the microwaves reflected on the product surface are received by the transmitting and / or receiving elements serving as receivers.
  • the incoming microwaves are fed to a receiving and evaluation circuit 41, which determines the transit time of the microwaves to the product surface and back and determines the instantaneous fill level therefrom.
  • FIG. 2 schematically shows an exemplary embodiment of a planar antenna structure which has a first transmitting and / or receiving element 11, 13, shown by solid lines in FIG. 2, and a second, shown by dotted lines in FIG. 2.
  • the transmitting and / or receiving elements 11, 13 are metallic structures which are applied to a side of a dielectric substrate 15 facing away from the filling material 5.
  • a conductive layer 17, for example in the form of a coating of the dielectric substrate 15 is provided, which has recesses 19, the shape and arrangement of which is preferably selected such that only electromagnetic waves of a desired mode are emitted , In the example shown, they are !
  • the dielectric is therefore preferably a chemically resistant material, e.g. Polytetrafluoroethylene (PTFE) or a composite material made of polytetrafluoroethylene and ceramic and / or glass fiber.
  • PTFE Polytetrafluoroethylene
  • a further dielectric disk 23 is provided on a side of the substrate 15 facing away from the conductive layer 17 and in operation from the filling material 5.
  • the disk 23 has a recess 25 through which a connection element (not shown in FIG. 2) can be inserted.
  • the connection element must be designed so that it connects to each transmission and / or receiving element 11, 13.
  • the electrical connection of the conductive layer 17 to ground or to a fixed reference potential is preferably also carried out via this connection element.
  • either through holes 27 can be provided in the substrate, through which appropriately shaped and arranged pins of the connecting element can be guided to the conductive layer 17, or contact pins connected to the conductive layer 17 can pass through the substrate 15 at the same location be led.
  • the first transmitting and / or receiving element 11 is arranged in a first part of the antenna structure and the second transmitting and / or receiving element 13 is arranged in a second part of the antenna structure.
  • Each of the transmitting and / or receiving elements 11, 13 is a structure which extends radially outward in the manner of a branch and which in each case fills a semi-circle of the substrate 15.
  • the branches of the first transmitting and / or receiving element 11 converge at a point 29 in the middle of the substrate, at which the first transmitting and / or receiving element 11 is connected to the connecting element.
  • the branches of the second transmitting and / or receiving element 13 converge in a circular segment 31 near the center of the substrate, on which the second transmitting and / or receiving element 13 is connected to the connecting element.
  • planar antenna structure shows a schematic representation of a further planar antenna structure.
  • the planar antenna structure has two transmission and / or reception elements 33 arranged opposite one another, which are separated from one another by two further transmission and / or reception elements 35 arranged opposite one another.
  • the circular surface of the substrate 15 is thereby divided into four quarter circles.
  • transmission and / or reception elements 37 e.g. according to their function.
  • all transmitting and / or receiving elements 37 arranged in the right part of the substrate and all transmitting and / or receiving elements 37 arranged in the left part can be interconnected to form a functional block.
  • the assignment is symbolically entered in FIG. 4 by marking one half of the transmitting and / or receiving elements 37 with a cross.
  • the embodiment of the antenna according to the invention with a planar antenna structure which has at least two transmission and / or reception elements offers a high degree of flexibility with regard to the use of the individual transmission and / or reception elements.
  • At least one of the transmitting and / or receiving elements preferably serves exclusively as a receiver. It is thereby achieved that an interference signal caused by the transmission has decayed at the receiver much more quickly and has a much lower amplitude than would be the case if this transmission and / or reception signal were also used for transmission. Accordingly, the block distance of the level measuring device designed in this way is smaller.
  • FIG. 6 The simplest form in which this can be implemented is shown in FIG. 6 in the form of a basic circuit diagram. All existing transmission and / or reception elements are divided into those which serve exclusively as transmitters designated as S in FIG. 6 and those which serve exclusively as receivers designated E in FIG. 6.
  • the transmitters S are fed by the microwave generator 9 and the receivers E forward received signals received by you to the reception and evaluation circuit 41.
  • the reception and evaluation circuit 41 determines the running time of the microwaves from the level measuring device to the product surface and back and determines the instantaneous level from this. This requires a time reference, which is only symbolically represented in FIG. 6 by a reference time t 0 .
  • the reference time t 0 is, for example, a trigger pulse which at the same time triggers the transmission of a microwave pulse and starts an internal time measurement in the reception and evaluation circuit 41.
  • the first transmitting and / or receiving element 11 serve exclusively as a transmitter and the second transmitting and / or receiving element 13 exclusively as a receiver.
  • the two transmitting and / or receiving elements 33 can only serve as transmitters and the two transmitting and / or receiving elements 35 can only serve as receivers.
  • the transmitting and / or receiving elements 37 provided with a cross can only serve as transmitters and the transmitting and / or receiving elements 37 without a cross can only serve as receivers. The separation of transmitter and receiver results in a significant reduction in the block distance.
  • a test measurement can therefore be carried out during commissioning, which serves to determine the measuring range in which the fill level is. Then, in normal measuring operation, the level last measured, for example, can be used to determine this. As soon as the fill level comes close to the close range, at least one transmitting and / or receiving element is used exclusively as a receiver. In the far range, all transmitting and / or receiving elements are used as transmitters and receivers.
  • FIG. 7 shows a basic circuit diagram of a fill level measuring device according to the invention, in which a part of the transmitting and / or receiving elements serve exclusively as a transmitter and the other transmitting and / or receiving elements serve exclusively as a receiver for measurements in the close range, and all transmitters are used for measurements in the far range - And / or receive elements serve as transmitters and receivers.
  • the microwave generator 9 is connected via a directional coupler or circulator 43 to those transmitting and / or receiving elements denoted by S in FIG. 7, which serve exclusively as transmitters for measurements in the close range.
  • the reception and evaluation circuit 41 for measurements in the close range is connected to those transmit and / or receive elements designated E in FIG. 7, which serve exclusively as receivers for measurements in the close range.
  • the basic circuit diagram thus corresponds to the basic circuit diagram shown in FIG. 6.
  • all of the transmitting and / or receiving elements are interconnected via a line 45 connecting the two functional blocks.
  • the line 45 is provided with an electronic switch 47, which is open for a measurement in the close range and closed for a measurement in the far range.
  • a switch 49 is provided in the connection between the receiving and evaluating circuit 41 and the transmitting and / or receiving elements E that serve exclusively as a receiver for a measurement in the near range, which switch 49 is closed for measurements in the near range and is open for measurements in the far range.
  • the line 45 is brought together with the signals received by the transmitting and / or receiving elements S and led via the directional coupler or ziculator 43 via a connection 53 provided with a switch 51 to the receiving and evaluating circuit 41.
  • the switch 51 is open for a measurement in the near range and closed for a measurement in the far range.
  • the switches 47, 49, 51 are controlled by a control circuit 55, which is connected to the reception and evaluation circuit 41.
  • the instantaneous fill level is determined in the reception and evaluation circuit 41 and e.g. compared to a reference value. If the fill level is above this reference value, the subsequent measurement is carried out as a measurement in the near range in that the control circuit 55 sets the associated switch positions by means of control signals. If the fill level is below this reference value, the subsequent measurement is carried out as a measurement in the far range in that the control circuit 55 sets the associated switch positions by means of control signals.
  • a hysteresis function can be installed here, e.g. two different reference values are used, with a drop below the lower reference value only causing a change from the short-range mode to the long-range mode and only a transition from the long-range mode into the short-range mode causing the upper reference value to be exceeded.
  • FIG. 8 shows a further basic circuit diagram for a level measuring device according to the invention.
  • this fill level measuring device at least one transmitting and / or receiving element S is used exclusively as a transmitter. These transmitting and / or receiving elements S are connected to the microwave generator 9. The remaining transmission and / or reception elements E serve exclusively as receivers and are connected to an input of the reception and evaluation circuit 41.
  • a difference-forming unit 57 is provided, which determines a difference signal which corresponds to the difference between transmission signals applied to the transmitters and reception signals received by the receivers.
  • an input of the difference-forming unit 57 is connected to the microwave generator 9 and a further input is connected to the transmitting and / or receiving elements E.
  • the difference can be made either by Corresponding direct superimposition of the signals take place or by the incoming signals being recorded and recorded in digital form.
  • the difference between the recorded data is then carried out, for example, using a microcomputer.
  • a delay unit 59 and a damping unit 61 are provided, which allow the signal coming from the microwave generator 9 to be delayed and damped by an adjustable delay time T and a damping factor ⁇ .
  • T and a damping factor ⁇ can either be carried out in an analog manner by means of corresponding electronic components or can be carried out arithmetically on the stored data.
  • the difference signal serves to improve the measurement accuracy and is fed to the reception and evaluation unit 41 for this purpose. For example, a small crosstalk existing despite the separation of transmitters and receivers from the transmitters to the receivers can be almost completely corrected by correspondingly superimposing the received signals with the difference signals.
  • the required data of the level measuring device e.g. The delay time T and the damping factor ⁇ can be determined by means of a factory calibration and stored permanently in the device.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

L'invention concerne un appareil de mesure d'un niveau de remplissage à micro-ondes servant à mesurer le niveau de remplissage d'un produit (5) contenu dans un récipient (1), qui fonctionne avec une seule antenne de structure la plus simple possible. Dans cet appareil, l'écart minimal requis entre le produit contenu (5) et l'antenne (7) pour effectuer la mesure est aussi réduit que possible. Ledit appareil comprend un générateur de micro-ondes (39) et une antenne (7) de structure plane qui sert à émettre les micro-ondes en direction du produit contenu (5) et à recevoir les micro-ondes réfléchies à la surface dudit produit. La structure plane de l'antenne présente au moins deux éléments émetteurs et/ou récepteurs (11, 13, 33, 35, 37, S, E).
EP01965161A 2000-10-10 2001-08-02 Appareil pour mesurer un niveau de remplissage Withdrawn EP1325289A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10049995A DE10049995A1 (de) 2000-10-10 2000-10-10 Füllstandsmessgerät
DE10049995 2000-10-10
PCT/EP2001/008962 WO2002031450A1 (fr) 2000-10-10 2001-08-02 Appareil pour mesurer un niveau de remplissage

Publications (1)

Publication Number Publication Date
EP1325289A1 true EP1325289A1 (fr) 2003-07-09

Family

ID=7659180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01965161A Withdrawn EP1325289A1 (fr) 2000-10-10 2001-08-02 Appareil pour mesurer un niveau de remplissage

Country Status (5)

Country Link
US (1) US6606904B2 (fr)
EP (1) EP1325289A1 (fr)
AU (1) AU2001285862A1 (fr)
DE (1) DE10049995A1 (fr)
WO (1) WO2002031450A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1434974B1 (fr) * 2001-10-10 2016-12-28 Endress + Hauser GmbH + Co. KG Dispositif et procédé pour determiner le niveau de remplissage d'une substance dans un contenant

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1373840B1 (fr) * 2001-03-28 2009-09-23 Endress + Hauser GmbH + Co. Dispositif pour la determination ou la surveillance d'un niveau de remplissage predefini dans un contenant
SE0102881D0 (sv) * 2001-08-30 2001-08-30 Saab Marine Electronics Radarnivåmätare
SE0103816D0 (sv) * 2001-11-16 2001-11-16 Saab Marine Electronics Slitsantenn
EP1504245A1 (fr) 2002-05-16 2005-02-09 VEGA Grieshaber KG Antenne plane et systeme d'antenne
US6629458B1 (en) * 2002-09-24 2003-10-07 Saab Marine Electronics Ab Device in a level gauging system
AU2003251273A1 (en) * 2002-09-24 2004-04-19 Saab Marine Electronics Ab A device in a level gauging system
US6859166B2 (en) * 2002-12-04 2005-02-22 Saab Marine Electronics Ab Antenna device for radar-based level gauging
US6759976B1 (en) * 2002-12-20 2004-07-06 Saab Marine Electronics Ab Method and apparatus for radar-based level gauging
US6959598B2 (en) * 2004-02-03 2005-11-01 Emerson Electric Co. Liquid level sensor for appliance and associated method
US20060000276A1 (en) * 2004-07-02 2006-01-05 Bran Ferren Method of measuring amount of substances
US7453393B2 (en) * 2005-01-18 2008-11-18 Siemens Milltronics Process Instruments Inc. Coupler with waveguide transition for an antenna in a radar-based level measurement system
US7467548B2 (en) * 2005-10-14 2008-12-23 Rosemount Tank Radar Ab Radar level gauge system and coupling
DE102005057053A1 (de) * 2005-11-30 2007-05-31 Vega Grieshaber Kg Referenzpulserzeugung
DE102006003742A1 (de) * 2006-01-25 2007-08-02 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Ermittlung und Überwachung des Füllstandes eines Mediums in einem Behälter
US7924217B2 (en) * 2008-06-03 2011-04-12 Rosemount Tank Radar Ab High sensitivity frequency modulated radar level gauge system
US8350751B2 (en) * 2010-03-10 2013-01-08 Rosemount Tank Radar Ab Radar level gauge with improved radar window
US8869612B2 (en) 2011-03-08 2014-10-28 Baxter International Inc. Non-invasive radio frequency liquid level and volume detection system using phase shift
RU2561309C1 (ru) * 2014-04-22 2015-08-27 Закрытое акционерное общество ЛИМАКО Радиолокационный уровнемер
RU2558631C1 (ru) * 2014-05-23 2015-08-10 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Бесконтактное радиоволновое устройство для определения уровня жидкости в емкости
RU2573627C1 (ru) * 2014-11-10 2016-01-20 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Бесконтактное радиоволновое устройство для измерения толщины диэлектрических материалов
DE102015100417A1 (de) * 2015-01-13 2016-07-14 Krohne Messtechnik Gmbh Verfahren zur Bestimmung des Füllstands eines Mediums in einem Behälter
DE102015100415A1 (de) * 2015-01-13 2016-07-14 Krohne Messtechnik Gmbh Vorrichtung zur Bestimmung des Füllstands eines Mediums
DE102015100414A1 (de) * 2015-01-13 2016-07-14 Krohne Messtechnik Gmbh Vorrichtung zur Bestimmung des Füllstands eines Mediums in einem Behälter
US20160209261A1 (en) * 2015-01-16 2016-07-21 Savage Services Corporation Vessel fluid measurement assemblies and related systems and methods
EP3073229B1 (fr) * 2015-03-27 2022-06-22 VEGA Grieshaber KG Capteur radar de mesure du niveau de remplissage et capteur de niveau limite intégré
RU2653578C1 (ru) * 2017-06-08 2018-05-11 Акционерное общество "ЛИМАКО" Радиолокационный уровнемер для измерения объема сыпучих продуктов в резервуарах
HUE053290T2 (hu) 2017-10-06 2021-06-28 Grieshaber Vega Kg Radar töltöttségi szintet mérõ eszköz chipen
EP3910326A1 (fr) 2020-05-12 2021-11-17 Rechner Industrie-Elektronik GmbH Système de détection et/ou de détermination du volume des corps ou des substances en matériau diélectrique et/ou conducteur

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3023055A1 (de) * 1979-07-12 1981-02-05 Emi Ltd Antenne
DE3339984A1 (de) * 1983-11-04 1985-05-23 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Schall- bzw. ultraschall-entfernungsmessgeraet
DE3438045C2 (de) * 1983-11-04 1986-12-18 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Anordnung zur Signalübertragung bei Ultraschall-Echolotgeräten
US4785664A (en) * 1986-04-28 1988-11-22 Kay-Ray, Inc. Ultrasonic sensor
EP0524275A1 (fr) * 1991-02-12 1993-01-27 Krohne Messtechnik Gmbh & Co. Kg Circuit electrique pour appareils de mesure du niveau de citernes industrielles et similaires
SE504682C2 (sv) * 1991-07-04 1997-04-07 Saab Marine Electronics Anordning för mätning av nivån av ett i en behållare befintligt medium
DE4241910C2 (de) * 1992-12-11 1996-08-01 Endress Hauser Gmbh Co Mit Mikrowellen arbeitendes Füllstandsmeßgerät
DE4345242A1 (de) * 1993-09-15 1995-04-06 Endress Hauser Gmbh Co Frequenzumsetzungsschaltung für ein Radar-Abstandsmeßgerät
US5406842A (en) * 1993-10-07 1995-04-18 Motorola, Inc. Method and apparatus for material level measurement using stepped frequency microwave signals
US5818391A (en) * 1997-03-13 1998-10-06 Southern Methodist University Microstrip array antenna
DE19800306B4 (de) * 1998-01-07 2008-05-15 Vega Grieshaber Kg Antenneneinrichtung für ein Füllstandmeß-Radargerät
DE59813795D1 (de) * 1998-05-06 2006-12-21 Endress & Hauser Gmbh & Co Kg Verfahren zur Messung des Füllstands eines Füllguts in einem Behälter nach dem Radarprinzip
DE59905200D1 (de) * 1999-09-07 2003-05-28 Endress & Hauser Gmbh & Co Kg Vorrichtung zur Bestimmung des Füllstands eines Füllguts in einem Behälter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0231450A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1434974B1 (fr) * 2001-10-10 2016-12-28 Endress + Hauser GmbH + Co. KG Dispositif et procédé pour determiner le niveau de remplissage d'une substance dans un contenant

Also Published As

Publication number Publication date
US6606904B2 (en) 2003-08-19
AU2001285862A1 (en) 2002-04-22
WO2002031450A1 (fr) 2002-04-18
US20020040596A1 (en) 2002-04-11
DE10049995A1 (de) 2002-04-11

Similar Documents

Publication Publication Date Title
EP1325289A1 (fr) Appareil pour mesurer un niveau de remplissage
EP1285239B1 (fr) Appareil de mesure de niveau de remplissage
EP0882955B1 (fr) Dispositif de mesure de niveau utilisant des micro-ondes
DE102010063167B4 (de) Mit hochfrequenten Mikrowellen arbeitendes Füllstandsmessgerät
EP0821431B1 (fr) Dispositif de production et d'émission de micro-ondes, notamment pour un appareil pour la mesure de niveau
WO2010040580A1 (fr) Appareil de mesure de niveau fonctionnant à micro-ondes
EP0204259B1 (fr) Système d'atterrissage aux instruments à deux fréquences
WO1995008128A1 (fr) Telemetre-radar
DE102017210781A1 (de) Radarantenne für ein Füllstandmessgerät
EP1774616B1 (fr) Dispositif de transmission de signaux haute frequence à large bande
EP0797104B1 (fr) Système radar monostatique et homodyne
DE10252091A1 (de) Verfahren und Anordnung für multistatische Nachdistanzradarmessungen
EP3467450A1 (fr) Appareil de mesure de niveau de remplissage à radar pourvu d'un système radar sur puce
DE10056002A1 (de) Radareinrichtung und Verfahren zum Betreiben einer Radareinrichtung
DE102004044130A1 (de) Monostatischer planarer Mehrstrahlradarsensor
DE102010020022A1 (de) Fahrerassistenzeinrichtung für ein Fahrzeug, Fahrzeug und Verfahren zum Betreiben eines Radargeräts
DE102015107419A1 (de) Radarvorrichtung
DE10051297A1 (de) Füllstandsmeßgerät
DE102013104699A1 (de) Vorrichtung zur Bestimmung des Füllstandes mittels einer Helixantenne
DE4331353C2 (de) Radar-Abstandsmeßgerät
WO2014090565A1 (fr) Appareil de mesure du niveau de remplissage
WO2002057723A1 (fr) Appareil de mesure de niveau de remplissage comportant un dispositif de couplage
EP2002505B1 (fr) Jonction de guide d'ondes pour générer des ondes à polarisation circulaire
DE10108993B4 (de) Vorrichtung zur Bestimmung des Füllstandes eines Füllguts in einem Behälter
DE10118009B4 (de) Vorrichtung zur Bestimmung und/oder Überwachung des Füllstands eines Füllguts in einem Behälter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030327

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LUETKE, WOLFRAM

Inventor name: MUELLER, ROLAND

17Q First examination report despatched

Effective date: 20091028

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140301