EP0227950A2 - Procédé de fabrication d'un réflecteur radar - Google Patents

Procédé de fabrication d'un réflecteur radar Download PDF

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Publication number
EP0227950A2
EP0227950A2 EP86116349A EP86116349A EP0227950A2 EP 0227950 A2 EP0227950 A2 EP 0227950A2 EP 86116349 A EP86116349 A EP 86116349A EP 86116349 A EP86116349 A EP 86116349A EP 0227950 A2 EP0227950 A2 EP 0227950A2
Authority
EP
European Patent Office
Prior art keywords
spherical
radar
radar reflector
reflecting
reflector
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Withdrawn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
EP86116349A
Other languages
German (de)
English (en)
Other versions
EP0227950A3 (fr
Inventor
Marlène Schäfer geb. Laval
Wilhelm Schuster
Jürgen Stahl
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.)
LAVAL, MARLENE
Original Assignee
Laval Marlene
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 Laval Marlene filed Critical Laval Marlene
Publication of EP0227950A2 publication Critical patent/EP0227950A2/fr
Publication of EP0227950A3 publication Critical patent/EP0227950A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
    • H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector

Definitions

  • the invention relates to a method for producing a T ripelLite containing, spherical, of uniform spherical composite-eighths radar reflector, wherein the ball-eighth made from foam whose mutually contacting flat surfaces are reflective.
  • Radar reflectors are important markings, especially on maritime and maritime roads, where they provide clear illuminated signs for safety in boat and shipping traffic.
  • radar reflectors Numerous embodiments of radar reflectors have been proposed and become known, but only a few work reasonably satisfactorily. For a good reflector effect, it is particularly important to maintain the right angles of the surfaces in corners and perfect reflector surfaces. However, precisely these features leave something to be desired in the known radar reflectors and have defects.
  • a ball has proven to be the most suitable form of a reflector body, which also influences the reflection properties.
  • DE-PS 23 08 701 describes a method for producing a spherical radar reflector, in which a rigid foam ball is divided into uniform spherical eighths, ie is cut. The resulting flat cut surfaces are made with reflector plates Mistake. When such a rigid foam ball is cut, pores of the foam are inevitably opened at the cut surfaces, as a result of which the properties of the surface are changed and the reflection is thereby impaired. In addition, when a ball is cut into a ball-eight, it is not guaranteed with certainty that the angular position of the reflecting flat surfaces is always exactly maintained.
  • the object of the invention was to provide a method for producing a radar reflector which makes it possible to create a reflector body of the type mentioned at the outset, in which the reflecting flat surfaces of the spherical eight are in each case arranged in an exact angular position with respect to one another and also have smooth surfaces that can be properly and permanently covered with reflector material.
  • each individual spherical eight part is foamed in a corresponding shape with smooth surfaces on all sides and, after the foaming out, material reflecting radar beams is connected to the plane surfaces.
  • the spherical eight can be manufactured with different densities, so that by choosing appropriate spherical eight a weight distribution can take place, which gives the radar reflector the necessary stability while at the same time being as light as possible. A large force acts on the fastening elements, which are generally located at the bottom, and therefore these elements must be particularly strong. On the other hand, the total weight of the reflector body should be light enough to avoid top heaviness. In the separate manufacture of the spherical eight, the density of each spherical eight can be selected accordingly, so that heavier spherical eight can be used for the fastening elements than for the remaining spherical eight.
  • Radar reflectors manufactured according to the invention can therefore be stably attached even at the highest points of boats and ships.
  • the manufacturing method according to the invention ensures the highest precision and durability for the right angles of the mirror surface which are essential for the function of the triple mirror.
  • an outer shell suitably consists of glass fiber reinforced polyester and thus corresponds to the material from which seawater-resistant yachts, pleasure boats and closed lifeboats are made.
  • Each spherical box 1, 2, 3, 4 is manufactured by foaming in standardized forms, whereby it is ensured that all demolded spherical boxes are identical.
  • the three flat surfaces 5, 6, 7 (FIG. 1) of a spherical box 1 serve as a base for the material reflecting the radar rays and result in a triple mirror arrangement.
  • the radar beam reflecting material can be a thin metal foil which lies closely against the contacting plane surface 6/6 'of two neighboring spherical quarters 1/2.
  • a preferred material consists of an adhesive in which particles of a metal reflecting radar rays are evenly distributed.
  • the mixture of adhesive and metal particles is applied to a flat surface 6 of a spherical eight 1 and the adjacent spherical eight 2 with its corresponding flat surface 6 'is applied to the Flat surface 6 of the first spherical eight 1 pressed.
  • the adhesive thus serves as a carrier for the reflective particles and at the same time as a binder by means of which the reflective plane surfaces of adjacent spherical eight are connected to one another.
  • a conductive material in the form of microfine particles is added to the mixture of adhesive and reflective metal particles.
  • Such a material which is finely distributed in the submicron range, is sufficient in extremely small quantities to generate an almost complete conductivity in the reflective layer applied to the flat surfaces.
  • the micro-fine structure of the additionally incorporated electrically conductive material for example conductive carbon black, bridges any gaps that may occur between metal particles, so that a desired uninterrupted conductivity is achieved.
  • Aluminum powder in platelet form for example, is suitable as the metal particle.
EP86116349A 1985-12-19 1986-11-25 Procédé de fabrication d'un réflecteur radar Withdrawn EP0227950A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545096 1985-12-19
DE19853545096 DE3545096A1 (de) 1985-12-19 1985-12-19 Verfahren zur herstellung eines radarreflektors

Publications (2)

Publication Number Publication Date
EP0227950A2 true EP0227950A2 (fr) 1987-07-08
EP0227950A3 EP0227950A3 (fr) 1987-09-23

Family

ID=6288948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116349A Withdrawn EP0227950A3 (fr) 1985-12-19 1986-11-25 Procédé de fabrication d'un réflecteur radar

Country Status (5)

Country Link
US (1) US4785301A (fr)
EP (1) EP0227950A3 (fr)
JP (1) JPS62230103A (fr)
DE (1) DE3545096A1 (fr)
NO (1) NO865102L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991016735A1 (fr) * 1990-04-12 1991-10-31 Colebrand Limited Reflecteur

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712079A1 (de) * 1987-04-09 1988-10-20 Marc Andrees De Ruiter Radarreflektor
JPS6457222A (en) * 1987-08-28 1989-03-03 Asahi Optical Co Ltd Zoom lens for compact camera
US5134413A (en) * 1988-12-27 1992-07-28 Georgia Tech Research Corporation Segmented cylindrical corner reflector
US5208601A (en) * 1990-07-24 1993-05-04 The United States Of America As Represented By The Secretary Of The Navy All-weather precision landing system for aircraft in remote areas
US5145108A (en) * 1990-09-26 1992-09-08 Minnesota Mining And Manufacturing Company Tape handle for carrying boxes
US5508704A (en) * 1994-06-16 1996-04-16 Hann; Lenn R. Method and apparatus for modulating a doppler radar signal
JP3395405B2 (ja) * 1994-10-19 2003-04-14 株式会社デンソー 反射アンテナ
CN103207422A (zh) * 2013-04-02 2013-07-17 中国科学院光电研究院 光学角反射靶球及其制造方法
CN103364763A (zh) * 2013-08-04 2013-10-23 葛强林 防雷达侦察、模仿地形地物的球形反射器
US11280659B2 (en) * 2019-08-23 2022-03-22 Endress+Hauser SE+Co. KG Reflector for radar-based fill level detection

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211584A (en) * 1962-02-12 1965-10-12 Chomerics Inc Radar antenna
DE2008266A1 (de) * 1970-02-23 1971-09-09 Inst Rundfunktechnik Gmbh Flachenstrahler mit zweidimensional ge krummter Oberflache fur sehr kurze elektro magnetische Wellen, insbesondere Parabolspie gelantenne
JPS5864808A (ja) * 1981-10-13 1983-04-18 Mitsubishi Electric Corp 曲面パネルの製造方法
EP0079062A1 (fr) * 1981-11-05 1983-05-18 Pico-Savac, Inc. Procédé pour la fabrication d'un réflecteur et dispositif correspondant
US4531128A (en) * 1982-07-26 1985-07-23 The United States Of America As Represented By The Secretary Of The Navy Buoyant radar reflector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7337843U (de) * 1974-04-11 Kloeckner W Radar-Reflektor zur Anbringung auf Schiffsmasten, festen und schwimmenden Seezeichen, sowie auf Molenköpfen, Hafeneinfahrten und Brücken
US3137852A (en) * 1954-11-26 1964-06-16 Del Mar Engineering Lab Inc Frangible target
DE1751683U (de) * 1957-05-15 1957-09-05 Hirschmann Radiotechnik Ukw-antennne mit kunststoff-folientraeger.
GB959463A (en) * 1961-03-06 1964-06-03 Chemring Ltd Improvements in corner reflectors
FR1445474A (fr) * 1964-12-09 1966-07-15 Procédé pour la fabrication de dispositifs collecteurs d'ondes comportant une paroi réfléchissante et dispositifs obtenus par un tel procédé
DE7128489U (de) * 1971-07-24 1972-04-06 Licentia Selbsttragende antenne
DE2308701C3 (de) * 1973-02-22 1982-03-04 Norddeutsche Seekabelwerke Ag, 2890 Nordenham Verfahren zur Herstellung eines Radarreflektors
US4096479A (en) * 1977-04-14 1978-06-20 The United States Of America As Represented By The Secretary Of The Navy Radar significant target

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211584A (en) * 1962-02-12 1965-10-12 Chomerics Inc Radar antenna
DE2008266A1 (de) * 1970-02-23 1971-09-09 Inst Rundfunktechnik Gmbh Flachenstrahler mit zweidimensional ge krummter Oberflache fur sehr kurze elektro magnetische Wellen, insbesondere Parabolspie gelantenne
JPS5864808A (ja) * 1981-10-13 1983-04-18 Mitsubishi Electric Corp 曲面パネルの製造方法
EP0079062A1 (fr) * 1981-11-05 1983-05-18 Pico-Savac, Inc. Procédé pour la fabrication d'un réflecteur et dispositif correspondant
US4531128A (en) * 1982-07-26 1985-07-23 The United States Of America As Represented By The Secretary Of The Navy Buoyant radar reflector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 154 (E-185)[1299], 6. Juli 1983; & JP-A-58 064 808 (MITSUBISHI DENKI K.K.) 18-04-1983 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991016735A1 (fr) * 1990-04-12 1991-10-31 Colebrand Limited Reflecteur
US5285213A (en) * 1990-04-12 1994-02-08 Colebrand Limited Electromagnetic radiation reflector

Also Published As

Publication number Publication date
NO865102D0 (no) 1986-12-17
JPS62230103A (ja) 1987-10-08
DE3545096A1 (de) 1987-07-09
US4785301A (en) 1988-11-15
NO865102L (no) 1987-06-22
EP0227950A3 (fr) 1987-09-23

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Inventor name: SCHAEFER GEB. LAVAL, MARLENE

Inventor name: STAHL, JUERGEN