EP2045870A1 - Modulare Radararchitektur - Google Patents

Modulare Radararchitektur Download PDF

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Publication number
EP2045870A1
EP2045870A1 EP08165807A EP08165807A EP2045870A1 EP 2045870 A1 EP2045870 A1 EP 2045870A1 EP 08165807 A EP08165807 A EP 08165807A EP 08165807 A EP08165807 A EP 08165807A EP 2045870 A1 EP2045870 A1 EP 2045870A1
Authority
EP
European Patent Office
Prior art keywords
radome
air
hot air
laminar
cooled
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.)
Granted
Application number
EP08165807A
Other languages
English (en)
French (fr)
Other versions
EP2045870B1 (de
Inventor
Laurent Duval
Philippe Etienne
Olivier Kennel
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.)
Thales SA
Original Assignee
Thales SA
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 Thales SA filed Critical Thales SA
Publication of EP2045870A1 publication Critical patent/EP2045870A1/de
Application granted granted Critical
Publication of EP2045870B1 publication Critical patent/EP2045870B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the present invention relates to transmission or reception systems operating under various climatic conditions and in particular in cold and wet weather conducive to frost formation. It relates in particular, but not exclusively, to the operation of radio detection systems with fixed antennas covering an angular sector delimited by a plane (angle of opening of the antenna pattern less than 180 ° or angle of tracking less than 180 ° ), whose antennas are installed in open space under radomes.
  • ground-based radar detection equipment Under certain environmental conditions, ground-based radar detection equipment is very disturbed by certain generally recurring climatic conditions that induce frost layer formation, the thickness of which is sometimes sufficient to alter the operation of the equipment by modifying its characteristics. radio transmission or reception. Thus a radome antenna can see its performance greatly degraded by the simple fact that the radome under which it is present has a surface covered with a thick layer of frost.
  • the complementary means comprise a planar frame coming from position around the radome to form with the latter a flat surface wider than the radome.
  • the diffusion nozzle and the collector being furthermore arranged on either side of the frame, above and below the radome, the widths of the nozzle and of the collector are defined so as to generate a laminar air flow whose surface is greater than the surface of the radome and covers the entire surface of the radome.
  • heating resistors are placed at the level of the nozzle and the collector, so putting under tension releases a heat which causes the defrosting of their openings.
  • the complementary means comprise a substantially identical non-planar surface of substantially equal dielectric constant, which fits on the radome so as to provide an internal circulation space. of thin air.
  • the diffusion nozzles and the collector are further configured and arranged on the complementary means so as to circulate a laminar air flow in the internal space.
  • the proposed solution makes it possible to avoid degradation of performance of the antennas since the deicing element consists only of hot air (it consists in inducing a laminar flow of hot air on the surface of the radome).
  • this speed of air circulation also makes it possible to suck after passing over the surface of the radome, a not cold but simply refreshed air that is returned to the hot air generator.
  • By reusing air already used it avoids too much energy expenditure in heating defrost air. It is still an easily automatable or remotely controllable system especially in the case where the furnace is an electrical device. Since no manual replenishing action of consumable material is necessary, the only actions to be taken to put the system into service are then the start-up and regulation actions of the de-icing system, actions that can be performed by means of electrical controls.
  • the set of "go" pipes has at its end opening at the level of the surface of the radome a ventilation nozzle 113 whose shape, defined according to the profile of the surface of the radome, ensures the proper channeling of the hot air.
  • the "return" pipe set has at its end opening at the level of the radome surface of an air collector 114 whose shape, also defined as a function of the profile of the surface of the radome, ensures optimum recovery of the laminar airflow cooled after passing over the surface of the radome.
  • the ventilation nozzle and the air collector have, as illustrated by FIG. figure 2 , a general shape of funnel of rectangular section of very small thickness at its mouth.
  • FIG 3 illustrates the influence of a lateral wind, illustrated by the arrow 31, on the efficiency of the device according to the invention, in its simplest version illustrated by the Figures 1 and 2 , in the defrosting of a surface radome plane.
  • the presence of a strong side wind has the effect of affecting the laminar flow 19 of a deformation of its course.
  • the laminar flow is deflected, in particular because of its small thickness, so that a portion 32 of the surface of the radome is not covered by this flow of hot air and a part 33 the hot air flow (represented by a dotted surface in the figure) is dissipated in the external environment at a loss and is therefore not used for defrosting the radome.
  • the characteristics of the radome are then disturbed and the performance of the equipment degraded.
  • the Figures 4 and 5 schematically show the structure of an alternative embodiment which advantageously makes it possible to solve the particular problem of the presence of lateral wind.
  • the device according to the invention comprises, in addition to the elements described above, a flat frame part 41 which frames the radome 13.
  • the device according to the invention comprises a ventilation nozzle 42 and a cooled air collector 43, whose dimensions have been modified compared to those of the elements 113 and 114 of the basic version of the device.
  • the dimensions of the elements 42 and 43 are such that the laminar flow produced, symbolized by the dots 44, covers an intermediate surface between the surface of the radome 13 and the surface of the assembly constituted by the radome 13 and the frame part 41 .
  • the advantage of such an embodiment variant is visible in the illustration of the figure 6 . Indeed, in case of side wind, the laminar flow of hot air produced by the device according to the invention on the surface of the radome is as before (cf. figure 3 ) deformed.
  • FIG. 7 illustrates a variant of embodiment of the device according to the invention, which variant can be combined both with the basic embodiment as illustrated by the Figures 1 and 2 , that with the variant embodiment illustrated by the Figures 5 and 6 .
  • the device according to the invention is provided with complementary means making it easier to start up in high frost weather, whereas it was previously stopped.
  • These means 71 and 72 are intended to rid the outlet openings of the ventilation nozzle and the air collector frost can obstruct them because of their narrowness. They consist for example of heating resistors placed in (or on) the ventilation nozzle and the air collector, near the orifices. In this way, thanks to these additional means, which can be advantageously put into service at a distance, the device according to the invention can be started after the orifices have been unobstructed, and without human intervention.
  • the embodiment described in the preceding paragraphs is hereby delivered as a non-limiting embodiment.
  • This embodiment has the particularity of being well adapted to the deicing of flat surfaces, that their geometric shape of the surface is a disk or a rectangle.
  • the profile of the ventilation nozzle and of the air collector are adapted so as to establish the most appropriate laminar air flow, without this modifying the operating principle of the device according to the invention such as claimed, a principle that can be applied as illustrated by the figure 8 to non-planar, convex surfaces for example.
  • the embodiment illustrated by the figure 8 is particularly adapted to the case where for some reason, of a radioelectric nature for example, the radome 81 placed in front of the antenna has a convex profile surface.
  • the production of a flow of laminar hot air capable of sweeping the entire surface of the radome, simply by means of a ventilation nozzle 82 and a cooled air collector 83 is difficult even impossible to achieve, except at the cost of considerable losses and a low or very low yield. Therefore, in such an embodiment, the additional means for guiding the laminar air flow are indispensable and take a particular shape, adapted to the profile of the air flow. radome.
  • This particular embodiment makes it possible to limit the losses of hot air and thus to limit the energy consumption of the system.
  • These means 84 are, in practice, constituted by an airflow guiding element whose surface has a profile similar to that of the radome and made of the same material as this one or made of a material having close dielectric characteristics. .
  • This element is also designed and arranged so that its inner face defines with the outer face of the radome a laminar space 85 in which circulates the flow of hot air.
  • the flow of hot air produced by the device according to the invention keeps the surface of the guiding element 84 at a temperature preventing the formation of frost; the temperature maintenance being performed by heat exchange between the air flow and the inner surface of the guide element 84 and then by conduction through the thickness of material that constitutes it.
  • Such an embodiment has the particular advantage of being suitable for defrosting a wide range of surfaces, ranging from a flat surface, a flat radome, to a hemispherical or even spherical type surface.
  • the mechanism according to the invention as described in the foregoing thus has several advantages, the main one being that it allows to ensure the defrosting of the radome with which it is associated.
  • This advantage is obtained by generating locally, on the surface of the radome, a flow of laminar hot air that warms the surface of the radome on which it circulates and which after cooling in contact with the surface is then recovered and reheated.
  • This recycling principle made possible by the forced air circulation which is maintained by the device according to the invention, advantageously makes it possible to provide a more economical device than a device operating in an open circuit by heating the cold outside air.
  • the device according to the invention also has the advantage of being remotely controllable or even automatable.

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  • Details Of Aerials (AREA)
EP08165807.2A 2007-10-05 2008-10-03 Enteisungsvorrichtung für ein Radom mittels Heissluftzirkulation Active EP2045870B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707010A FR2922050B1 (fr) 2007-10-05 2007-10-05 Kit anti-givre pour radome par circulation d'air chaud.

Publications (2)

Publication Number Publication Date
EP2045870A1 true EP2045870A1 (de) 2009-04-08
EP2045870B1 EP2045870B1 (de) 2017-07-26

Family

ID=39361246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08165807.2A Active EP2045870B1 (de) 2007-10-05 2008-10-03 Enteisungsvorrichtung für ein Radom mittels Heissluftzirkulation

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EP (1) EP2045870B1 (de)
FR (1) FR2922050B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11059458B2 (en) 2018-08-08 2021-07-13 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for cleaning obstructions for the sensors of an autonomous vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014035525A2 (en) * 2012-06-12 2014-03-06 Integral Laser Solutions, Llc. Active cooling of high speed seeker missile domes and radomes
FR3077268A1 (fr) 2018-01-26 2019-08-02 Airbus Operations Dispositif de degivrage d'une surface configure pour ne pas generer d'interference electromagnetique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631745A1 (fr) * 1988-05-20 1989-11-24 Thomson Csf Dispositif de protection d'une antenne, notamment contre le givre
JPH02109402A (ja) * 1988-10-19 1990-04-23 Fujitsu Ltd アンテナの融雪構造
JPH0661717A (ja) * 1992-08-13 1994-03-04 Nec Corp アンテナ融雪装置
WO1997011505A1 (en) * 1995-09-19 1997-03-27 Walton William B Jr De-icing of satellite antenna with cover
JP2006003162A (ja) * 2004-06-16 2006-01-05 Mitsubishi Electric Corp レドーム保護装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631745A1 (fr) * 1988-05-20 1989-11-24 Thomson Csf Dispositif de protection d'une antenne, notamment contre le givre
JPH02109402A (ja) * 1988-10-19 1990-04-23 Fujitsu Ltd アンテナの融雪構造
JPH0661717A (ja) * 1992-08-13 1994-03-04 Nec Corp アンテナ融雪装置
WO1997011505A1 (en) * 1995-09-19 1997-03-27 Walton William B Jr De-icing of satellite antenna with cover
JP2006003162A (ja) * 2004-06-16 2006-01-05 Mitsubishi Electric Corp レドーム保護装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11059458B2 (en) 2018-08-08 2021-07-13 Toyota Motor Engineering & Manufacturing North America, Inc. System and method for cleaning obstructions for the sensors of an autonomous vehicle

Also Published As

Publication number Publication date
FR2922050A1 (fr) 2009-04-10
FR2922050B1 (fr) 2016-01-29
EP2045870B1 (de) 2017-07-26

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