Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H11/00—Defence installations; Defence devices
  • F41H11/02—Anti-aircraft or anti-guided missile or anti-torpedo defence installations or systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H9/00—Equipment for attack or defence by spreading flame, gas or smoke or leurres; Chemical warfare equipment
  • F41H9/06—Apparatus for generating artificial fog or smoke screens
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
  • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
  • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
  • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
  • F42B12/70—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies for dispensing radar chaff or infrared material
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S149/00—Explosive and thermic compositions or charges
  • Y10S149/117—Smoke or weather composition contains resin

Definitions

• the invention relates to a method for clouding a gaseous medium in the optical and infrared (I.R.) bands of the spectrum of electromagnetic waves; it also relates to the application of this method to an electro-optical countermeasures device.
• I.R. optical and infrared
• Certain modern weapons systems are particularly effective against relatively sensitive objectives, such as tanks, aircraft, ships, shelters, etc. These weapons systems use projectiles or missiles equipped with electro-optical means of guidance or autoguiding which exploit the energy of the thermal or optical radiation coming from the aimed objective, also called target in what follows. These electromagnetic radiations are: either emitted directly by the target itself, and more precisely by its propulsion system, or that they result indirectly from the diffusion by the target of a natural light or an illumination intentional.
• the aim is to create a reflecting and / or absorbing medium, with a view to producing, generally, in the form of a cloud, a protective screen behind which the target to be protected can remain or evolve; according to the passive technique, it is also necessary to cite the implementation, on board the target, of specific means making it possible to reduce the level of radiation emitted, in particular, by the propulsion unit or any other hot source.
• the invention also provides means for jointly dispersing, in the atmosphere, sorting boron chloride and water stored separately in one or more containers.
• measuring equipment has been placed to detect, process and view the echo signals backscattered by the propagation medium (atmosphere) and the target.
• the main parameters such as the power radiated by the laser illuminator, the sensitivity of the measurement equipment, were adjusted so as to obtain a target echo whose signal / noise ratio is Student.
• a container containing BCe 3 was placed between points A and B of the field.
• a container is deposited in which the aerosol is stored in liquid or gaseous form, this container comprising a diffusion nozzle equipped with an opening means which can be operated manually or remotely automatically, for example, under the action of a signal supplied by an alert receiver.
• the container containing the aerosol is launched by the target itself or by bana means read; the container then constitutes a projectile the active charge of which is the aerosol; this projectile is equipped, for example, with a temperate, proximity or impact rocket making it possible to trigger an appropriate pyrotechnic or mechanical device which causes the release of the aerosol at the chosen point of the atmosphere and its subsequent diffusion .
• the aerosol is contained in a bomb equipped with a braking parachute and an opening means.
• a device for simultaneously diffusing the aerosol and water essentially comprises the following elements: a first reservoir containing the aerosol in a liquid or gaseous form and a second reservoir containing water, each reservoir is provided with a conduit fitted with an opening valve, the outputs of these conduits are connected to a common diffuser.
• the latter is kept under pressure by means of an auxiliary tank containing a gas under pressure or pyrotechnically pressurized.
• the pressure supplied by the auxiliary gas reservoir can be applied to the first reservoir containing the aerosol.
• these two products are enclosed in two compartments of a single container and means, for example, pyrotechnic means, ensure the rupture of the compartments and the joint release of the two products and their dispersion under the effect of the heat flow resulting from the operation of the pyrotechnic charge.
• the nozzle of a. propellant and the gas jet which escape therefrom are a source of radiation whose energy is exploited by the electrooptic self-guiding means of tactical missiles. If one or a plurality of diffusers supplied by a source of boron trichloride are present at the periphery of the nozzle of the propellant, there is produced, at the outlet of this nozzle, a medium capable of very considerably reducing the thermal radiation of the propellant.
• the flow rate of the boron trichloride source can be controlled by an alert detector which detects the approach of an offensive tactical missile, by a program or manually by the pilot.
• the method can be used in conjunction with active means such as emissive lures.
• active means such as emissive lures.
• the invention finds its application in an electro-optical countermeasuring device comprising means for diffusing boron trichloride alone or simultaneously with water; these bodies can be contained in separate containers or in watertight compartments of a single container such as the interior of a projectile.
• the release of boron trichloride and, optionally, of water if necessary, can be ensured by pyrotechnic means arranged outside the containers.
• the diffusion means can be constituted by diffusers arranged in the vicinity of the nozzle of this propellant.
• An electro-optical countermeasures device implementing the opacification method according to the invention makes it possible to ensure: the punctual protection of a target, the camouflage of an extended group of objectives, the reduction of the radiation from a heat source, including the level of radiation from a vehicle's propulsion system.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Remote Sensing (AREA)
• Radar, Positioning & Navigation (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Aviation & Aerospace Engineering (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Optical Radar Systems And Details Thereof (AREA)
• Optical Filters (AREA)
• Manufacturing Optical Record Carriers (AREA)
• Laminated Bodies (AREA)
• Glass Compositions (AREA)
• Surface Treatment Of Glass (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=9225807

Family Applications (1)

Country Status (20)

Cited By (9)

Families Citing this family (3)

Citations (4)

Family Cites Families (5)

• 1979
  • 1979-05-23 FR FR7913195A patent/FR2457474A1/fr active Granted
• 1980
  • 1980-05-12 EP EP80400647A patent/EP0020217B2/de not_active Expired - Lifetime
  • 1980-05-12 FI FI801536A patent/FI801536A/fi not_active Application Discontinuation
  • 1980-05-12 AT AT80400647T patent/ATE6174T1/de not_active IP Right Cessation
  • 1980-05-12 DE DE8080400647T patent/DE3066473D1/de not_active Expired
  • 1980-05-20 ES ES491624A patent/ES491624A0/es active Granted
  • 1980-05-20 YU YU01345/80A patent/YU134580A/xx unknown
  • 1980-05-20 ZA ZA00802997A patent/ZA802997B/xx unknown
  • 1980-05-20 IL IL60130A patent/IL60130A/xx unknown
  • 1980-05-20 US US06/151,590 patent/US4328117A/en not_active Expired - Lifetime
  • 1980-05-20 EG EG315/80A patent/EG14065A/xx active
  • 1980-05-20 BR BR8003148A patent/BR8003148A/pt not_active IP Right Cessation
  • 1980-05-22 CA CA000352515A patent/CA1147545A/en not_active Expired
  • 1980-05-22 PT PT71291A patent/PT71291A/pt unknown
  • 1980-05-22 NO NO801539A patent/NO147350C/no unknown
  • 1980-05-22 GR GR62028A patent/GR68437B/el unknown
  • 1980-05-22 DK DK223980A patent/DK151060C/da not_active IP Right Cessation
  • 1980-05-22 TR TR21717A patent/TR21717A/xx unknown
  • 1980-05-23 JP JP6881480A patent/JPS55165500A/ja active Pending
  • 1980-05-23 AR AR281171A patent/AR221939A1/es active

Patent Citations (4)

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