EP1039572A2 - Appareil pour la séparation étanche à la pression d'un premier et un deuxième guide d'ondes et procédé pour sa fabrication - Google Patents

Appareil pour la séparation étanche à la pression d'un premier et un deuxième guide d'ondes et procédé pour sa fabrication Download PDF

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Publication number
EP1039572A2
EP1039572A2 EP00103744A EP00103744A EP1039572A2 EP 1039572 A2 EP1039572 A2 EP 1039572A2 EP 00103744 A EP00103744 A EP 00103744A EP 00103744 A EP00103744 A EP 00103744A EP 1039572 A2 EP1039572 A2 EP 1039572A2
Authority
EP
European Patent Office
Prior art keywords
conductor body
waveguide
assembly according
metal jacket
adapter
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.)
Ceased
Application number
EP00103744A
Other languages
German (de)
English (en)
Other versions
EP1039572A3 (fr
Inventor
Johanngeorg Otto
Stefan Burger
Thomas Werner
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
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Application filed by Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of EP1039572A2 publication Critical patent/EP1039572A2/fr
Publication of EP1039572A3 publication Critical patent/EP1039572A3/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/08—Dielectric windows

Definitions

  • the invention relates to an assembly for pressure-tight Separation of a first waveguide from a second Waveguide, being between the first and the second Waveguide a pressure-resistant conductor body is arranged.
  • the invention further relates to a method of manufacture of such an assembly.
  • Such an assembly is used to couple in electromagnetic waves, for example microwaves, the be generated by an electronic circuit in hermetically sealed areas, for example potentially explosive areas or closed areas Metal container.
  • Such one Window generally consists of a soldered or melted glass in the waveguide.
  • the biggest problem with Such windows are small Pressure resistance.
  • Such windows are usually only allowed exposed to a pressure of a few bar. This is attributed to the fact that the glasses are only a very small Have thickness. This small thickness is for the High bandwidths usually required.
  • the object of the invention is a to create pressure-tight waveguide bushing, the one Temperature resistance in the range of 250 ° C and higher as well as a pressure load capacity in the range of 60 to 100 bar having. At the same time, the bandwidth should not be large Effort can be adapted to the respective requirements can.
  • This object is achieved by a Assembly for the pressure-tight separation of a first one Waveguide from a second waveguide, with a flameproof conductor body and a first adapter, the between the first waveguide and the one facing it End of the conductor body is arranged, and a second Adapter between the second waveguide and this facing end of the conductor body is arranged, wherein the dielectric constants of the first and second Adapters between those of the conductor body and the Waveguide lie.
  • the assembly according to the invention is simplified expressed on a deployment of different Components for the various functions, the one Implementation through a waveguide must meet.
  • the conductor body ensures pressure resistance, its material specially adapted to the requirements can be. Particularly suitable as material for the In addition to ceramics, the conductor body is glass, especially quartz glass.
  • the adapters are used for compensation the transition points. Your dielectric constant will be like this chosen that the optimal passage behavior is achieved. Plastic, in particular, can be used as the material for the adapter Polytetrafluoroethylene.
  • the conductor body has a circular Cross-section and is surrounded by a metal jacket.
  • a metal jacket particularly good for connection to other components can be used, for example by welding.
  • the metal jacket is a Exerts compressive stress on the conductor body.
  • This design takes into account that the materials ceramic and glass, the are preferably used for the conductor body have a very high compressive strength, but only one low tensile strength. If now from the metal jacket Compressive stress is applied to the conductor body, this compressive stress overlaps with all the stresses, that act on the conductor body during operation can. Even if tensile stresses in the Conductor body are introduced results in reserting load in any case a compressive stress, so that damage to the conductor body is excluded is.
  • the compressive stress to be exerted by the metal jacket can preferably be generated by the conductor body and the metal shell according to an interference fit are dimensioned.
  • Hastelloy As a material for the metal jacket that the Resists occurring stresses is, in particular an alloy called Hastelloy or Alloy with the material number 1.4571 suitable.
  • a minimum length of the guide body of 10 to 15 mm demands.
  • the length of the guide body can be for one select a specific frequency (center frequency) so that it ⁇ / 4 or ⁇ / 4 + is a multiple of ⁇ / 2.
  • Adapters are preferably captive in adapter holders added.
  • the adapters can be used as stepped cylinders a first and a second section, the first section being a larger one Has diameter than the second section and the first Section faces the conductor body.
  • An assembly as described above can in particular an electrical device with a Contact pin and an antenna, the contact pin radiates into the first waveguide and the antenna with the second waveguide is connected and the assembly between the first and the second waveguide is arranged.
  • a transmitter can be connected via the contact pin and the Radiate the antenna into a container, for example is sealed pressure-tight.
  • an assembly as described above the conductor body is introduced into a metal jacket in such a way that the metal jacket a compressive stress on the Ladder body applies.
  • This method is preferred as follows: First, the metal jacket is placed on a heated to such a temperature that its inside diameter is larger than the outer diameter of the conductor body. Then it will be the conductor body inserted into the metal jacket. Finally, the metal jacket is cooled so that it is on shrinks the conductor body. This procedure enables it that from the metal sheath to the conductor body applied compressive stresses according to the respective Adjust requirements by changing the inside diameter of the Metal sleeve with a predetermined undersize compared to that Outside diameter of the conductor body is produced.
  • a conductor body is preferably made from this method Quartz glass used.
  • FIG. 1 An electronic device can be seen in FIG which an assembly according to the invention is used.
  • the electronic device here is a level meter, according to works on the principle of a radar system.
  • a (not shown) transmission circuit provided that through a metal pin 10 with a first waveguide 12 is coupled.
  • the first waveguide 12 is through a pressure-tight assembly 14, which will be discussed in detail later is described with a second waveguide 16 coupled, which in turn is connected to an antenna 18.
  • the antenna 18 is intended for inside a to be arranged in a pressure-tight closed space. Out for this reason, the second waveguide 16 is pressure-tight completed by means of assembly 14.
  • This assembly 14 (see in particular Figure 2) includes a metal jacket 20 that has a conductor body 22 encloses. Between the first waveguide 12 and the Metal jacket 20, a first adapter holder 24 is arranged, which encloses a first adapter 26. Between the Metal sheath 20 and the second waveguide 16 is a arranged second adapter holder 28, the one adapter 30 encloses.
  • Both the metal jacket 20 and the two Adapter holders 24, 28 have a circular cross section.
  • the conductor body 22 has a cylindrical shape, and the two adapters 26, 30 each have a gradation cylindrical shape, with the larger section Diameter in each case adjacent to the conductor body 22 is arranged. This way the adapters are without further measures cannot be lost in the adapter holders added.
  • the sleeve-shaped metal jacket is preferably made from an alloy called Hastelloy or an alloy with the material number 1.4571. This Alloys have a particularly high heat resistance.
  • the conductor body 22 can consist of ceramic. It preferably consists of glass, in particular quartz glass.
  • the unit made of metal jacket 20 and conductor body 22 is manufactured as follows: First, a glass rod with the desired diameter and length provided. For example, the diameter can be 4.35 mm ⁇ 0.01 mm, and the length is 18 mm ⁇ 0.2 mm.
  • the metal jacket 20 is undersized from 0.03 to 0.04 mm. Thus the inside diameter of the Metal sheath 4.32 ⁇ 0.01 mm. If the metal jacket 20 heated in an oven to 700 to 800 ° C, for example , it expands so far that the conductor body 22nd made of quartz glass can be freely inserted into the metal jacket 20 can. When the metal jacket 20 cools down, it shrinks on the conductor body 22 firmly.
  • the metal jacket 20 exercises one after cooling Compressive stress on the conductor body 22.
  • This Compressive stress ensures, on the one hand, that the conductor body 22 sits firmly in the metal jacket 20, so that it also at a high pressure is kept safe, and on the other hand, that the conductor body 22 is biased in this way is that no tensile stresses can occur during operation, which lead to destruction of the conductor body 22 could.
  • the Adapters 26, 28 attached on the end faces of the conductor body 22, the Adapters 26, 28 attached. These preferably consist of Plastic, especially polytetrafluoroethylene.
  • the Dielectric constant of the adapters 26, 30 is so selected to be between those of the waveguides 12, 16 and the conductor body 22 is located. That way you can special transition structures that come from RF technology are known, for example step-like or cone-like Structures to be avoided. Such structures are namely with the ceramic or glass Conductor body 22 cannot be achieved if it is highly resilient should be.
  • the material of the waveguide 12, 18. the adapter holder 24, 28 and the metal jacket 20 is weldable, so that all parts through easy to weld seams in the can be connected in the correct order.

Landscapes

  • Waveguides (AREA)
  • Waveguide Connection Structure (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
  • Chemical Vapour Deposition (AREA)
EP00103744A 1999-03-16 2000-02-23 Appareil pour la séparation étanche à la pression d'un premier et un deuxième guide d'ondes et procédé pour sa fabrication Ceased EP1039572A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19911744A DE19911744C2 (de) 1999-03-16 1999-03-16 Baugruppe zur druckdichten Trennung eines ersten Hohlleiters von einem zweiten Hohlleiter sowie Verfahren zur Herstellung einer solchen Baugruppe
DE19911744 1999-03-16

Publications (2)

Publication Number Publication Date
EP1039572A2 true EP1039572A2 (fr) 2000-09-27
EP1039572A3 EP1039572A3 (fr) 2001-07-18

Family

ID=7901196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103744A Ceased EP1039572A3 (fr) 1999-03-16 2000-02-23 Appareil pour la séparation étanche à la pression d'un premier et un deuxième guide d'ondes et procédé pour sa fabrication

Country Status (5)

Country Link
US (1) US6469599B1 (fr)
EP (1) EP1039572A3 (fr)
JP (1) JP2000299602A (fr)
CA (1) CA2299851C (fr)
DE (1) DE19911744C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002057723A1 (fr) * 2001-01-19 2002-07-25 Endress+Hauser Gmbh + Co. Kg Appareil de mesure de niveau de remplissage comportant un dispositif de couplage
US6640628B2 (en) 2001-01-19 2003-11-04 Endress + Hauser Gmbh + Co. Kg Level-measuring device
US6677891B2 (en) 2001-01-19 2004-01-13 Vega Grieshaber Kg Method and device for transmitting and receiving electromagnetic waves

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112004001982B4 (de) * 2003-10-20 2020-11-26 Rosemount Tank Radar Ab Radarfüllstandsmessgerät mit Antennenanordnung zur verbesserten Radarfüllstandsmessung
WO2010080196A2 (fr) 2009-01-08 2010-07-15 Battelle Memorial Institute Comptage de cycle dépendant du trajet et évaluation de fatigue multi-axiale pour ouvrages d'art
DE102012103493A1 (de) * 2012-04-20 2013-10-24 Endress + Hauser Gmbh + Co. Vorrichtung zur Bestimmung des Füllstandes eines Füllguts in einem Behälter
DE102018213435A1 (de) * 2018-08-09 2020-02-13 Vega Grieshaber Kg Multi-Band-Radar-Antennensystem
DE102021131503A1 (de) 2021-11-30 2023-06-01 Endress+Hauser SE+Co. KG Füllstandsmessgerät
CN114420521A (zh) * 2022-01-14 2022-04-29 深圳奥镨科技有限公司 一种太赫兹真空电子器件输出窗口及其制作方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156881A (en) * 1962-08-22 1964-11-10 Gen Electric Vacuum tight electromagnetic radiation permeable window seal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597710A (en) * 1969-11-28 1971-08-03 Microwave Dev Lab Inc Aperiodic tapered corrugated waveguide filter
SE447804B (sv) * 1983-04-20 1986-12-15 Kuroki Kogyosho Kk Forfarande for framstellning av sammansatta stalror
US4676663A (en) * 1984-05-23 1987-06-30 General Electric Company Arrangement for remote ultrasonic temperature measurement
US4688009A (en) * 1985-05-13 1987-08-18 Varian Associates, Inc. Triple-pane waveguide window
US4799036A (en) * 1987-12-07 1989-01-17 The United States Of America As Represented By The Department Of Energy Radio frequency coaxial feedthrough
US5926080A (en) * 1996-10-04 1999-07-20 Rosemount, Inc. Level gage waveguide transitions and tuning method and apparatus
US5872494A (en) * 1997-06-27 1999-02-16 Rosemount Inc. Level gage waveguide process seal having wavelength-based dimensions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156881A (en) * 1962-08-22 1964-11-10 Gen Electric Vacuum tight electromagnetic radiation permeable window seal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002057723A1 (fr) * 2001-01-19 2002-07-25 Endress+Hauser Gmbh + Co. Kg Appareil de mesure de niveau de remplissage comportant un dispositif de couplage
US6640628B2 (en) 2001-01-19 2003-11-04 Endress + Hauser Gmbh + Co. Kg Level-measuring device
US6677891B2 (en) 2001-01-19 2004-01-13 Vega Grieshaber Kg Method and device for transmitting and receiving electromagnetic waves

Also Published As

Publication number Publication date
CA2299851C (fr) 2003-07-15
DE19911744A1 (de) 2000-10-05
EP1039572A3 (fr) 2001-07-18
US6469599B1 (en) 2002-10-22
JP2000299602A (ja) 2000-10-24
CA2299851A1 (fr) 2000-09-16
DE19911744C2 (de) 2003-02-27

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