WO2009094004A1 - Méthodologie d'alignement de ligne de visée et de correction de points de pointage balistiques à l'aide d'un traceur optique (stroboscope) - Google Patents

Méthodologie d'alignement de ligne de visée et de correction de points de pointage balistiques à l'aide d'un traceur optique (stroboscope) Download PDF

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Publication number
WO2009094004A1
WO2009094004A1 PCT/US2008/011122 US2008011122W WO2009094004A1 WO 2009094004 A1 WO2009094004 A1 WO 2009094004A1 US 2008011122 W US2008011122 W US 2008011122W WO 2009094004 A1 WO2009094004 A1 WO 2009094004A1
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WIPO (PCT)
Prior art keywords
optical
fire control
projectile
control device
optical signals
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Ceased
Application number
PCT/US2008/011122
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English (en)
Inventor
Kevin Michael Sullivan
Jacob Stefanus Budricks
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Individual
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Individual
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Publication of WO2009094004A1 publication Critical patent/WO2009094004A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • F42B12/38—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 of tracer type
    • F42B12/382—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 of tracer type emitting an electromagnetic radiation, e.g. laser beam or infrared emission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/14—Indirect aiming means
    • F41G3/142—Indirect aiming means based on observation of a first shoot; using a simulated shoot

Definitions

  • the present invention relates to weaponry systems, more specifically, it relates to a method and arrangement for improving precision and accuracy of weaponry and their fire control devices .
  • fire control devices use ballistic tables and metrological sensors to calculate a predicted hit point (gunner aiming point), further, some fire control devices allow for users to input manual drift and elevation offsets, but these offsets are generally linear offsets. Further, fire control devices often provide inaccurate aim points because a limited number of inputs are taken into consideration while calculating the aim points.
  • Chemical tracers have been used in ammunition for many years, but use of chemical tracers induces drag that negatively affects projectile ballistics. Further, chemical tracers do not allow precise measurement of the projectile time-location.
  • the patent number GB 2,107,835 relates to a method and a device for correcting subsequent firing of a projectile from a weapon.
  • the disclosed system is limited to the firing of the projectiles having a flat trajectory only, excluding its use for long range firing, and it does not take into account certain factors such as errors due to gun jump or the like.
  • the US Patent 7,239,377 relates to a method and a device for determining a second range to a target based on data observed from a first range to the target.
  • the method uses computer programs to calculate second range to the target using sensors such as laser range sensor and tilt sensor; however, practical considerations, such as atmospheric conditions, limit the accuracy of calculated solutions.
  • sensors such as laser range sensor and tilt sensor
  • practical considerations such as atmospheric conditions, limit the accuracy of calculated solutions.
  • the purpose of the present invention is to improve the precision and accuracy of weaponry systems by taking into account all the factors that affect the actual flight of a projectile fired from a fire control device.
  • optical emissions include but may not be restricted to light in ultraviolet, infra red and visual wavelengths.
  • It is still another object of the present invention is to use real time observed data to calculate new and improved fire control solutions for subsequent firing of projectiles.
  • the weapon's ammunition tracer strobe which is normally located with the fuze in the projectile ogive, provides time-location data and the fire control device observes the angular position of the projectile.
  • step (d) receiving the optical signals generated in step (b) using an optical detector attached to the fire control device and measuring angular shift of the fire control device using sensors to detect gun jump or other post firing movement; (e) processing the optical signals in a video processor for identifying optical location information of the flight of the projectile;
  • FIG. 1 illustrates a weaponry system for firing a projectile.
  • FIG. 2 illustrates different components of a fire control device.
  • FIG. 3 (a) illustrates the projectile and an exploded view of its nose.
  • FIG. 3(b) illustrates the transmission of optical signals.
  • FIG. 4 (a) illustrates an induced yaw in the projectile in a flat trajectory.
  • FIG. 4(b) illustrates the axis of rotation of the projectile for ballistic trajectory.
  • FIG. 4 (c) illustrates a ballistic profile of an in-flight projectile.
  • FIG. 5 illustrates an optical strobe images of the projectile at pre-determined time intervals (viewed from the fire control or position of the fire control) .
  • FIG. 6 illustrates an actual hit point of the projectile fired without any correction.
  • FIG. 7 illustrates a lateral drift and vertical drop of the fired projectile.
  • FIG. 8 illustrates a lateral camera shift and vertical camera shift caused by gun jump at pre-determined time intervals.
  • FIG. 9 illustrates a lateral correction factor and vertical correction factor.
  • FIG. 10 illustrates a subsequently fired projectile hitting the intended target .
  • FIG. 11 shows a table for a sequence of measurements at different points of time to calculate an improved fire control solution.
  • Embodiments of the present invention provide a method and arrangement for bore sight alignment and correcting ballistic aiming points using an optical strobe tracer.
  • numerous specific details are provided, such as examples of components and/or mechanisms, to provide a thorough understanding of the various embodiments of the present invention.
  • One skilled in the relevant art will recognize, however, that an embodiment of the present invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like.
  • well- known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.
  • FIG. 1 illustrates a weaponry system comprising one or more projectiles 100, a weapon 600 and a fire control device 200.
  • the weapon 600 can be a gun, launcher, firearms, cannons, rocket pods, aircraft and the like.
  • the projectile 100 aimed at a target 400 is fired through a barrel 610 of the weapon 600 in response to a shoot command generated manually by a user.
  • the shoot command can also be generated automatically by the fire control device 200 of the weaponry.
  • FIG. 2 illustrates the weapon 600 and the fire control device 200 comprising one or more sensors 220, one or more optical detectors 230, one or more video processors 240 and a computer 250 having a software 260.
  • the sensors 220 are used in the present invention for identifying signals or any other parameters.
  • Such sensors can be of various types, for example, position sensors, sensors for gun elevation, optical sensors and the like.
  • the optical detector 230 can be a camera or any image capturing device, for example video camera, infrared camera or the like.
  • the fire control device 200 measures angular position information of the weapon 600, when the weapon 600 fires the projectile 100 aimed at the target 400.
  • the angular position information includes radial azimuth/elevation barrel centerline 620 and elevation of barrel/fire control elevation, wherein the angular position information is measured by using the sensors 220 and the information is recorded by the computer 250.
  • FIG. 3 (a) illustrates the projectile 100 and exploded view of nose 130 of the projectile 100.
  • the projectile 100 comprises an optical strobe emitter 110, wherein the optical emitter 110 is disposed in a translucent housing 120 of the projectile 100.
  • Optical emitter 110 of the projectile 100 is a light generating source which can be a light emitting diode, laser or the like.
  • an electronic fuze 150 is disposed in the projectile 100.
  • the fuze 150 is programmed to relay precise position information of the projectile 100 to the fire control device 200.
  • FIG. 3(b) illustrates the transmission of optical signals 140 generated from the optical emitter 110 of the projectile 100, wherein the optical signals 140 are generated at predetermined time intervals during flight of the projectile 100.
  • a 360 degree refractive lens (not shown in the figure) disposed in the translucent housing 120 of the projectile 100. The lens allows optimized transmission of optical signals 140 from the emitter 110 in the direction of the fire control device 200.
  • the optical emitter 110 emits optical signals 140 of high intensity and for very short period of time during the flight of the projectile 100.
  • Various types of optical emissions such as emissions in ultraviolet, infra red and visual spectrum of various frequencies and intensities can also be used without altering the scope of the invention.
  • the optical emission (signal) 140 may include embedded signals corresponding to the precise time function.
  • FIG. 4 (a) and FIG. 4(b) illustrate an arrangement for effectively transmitting the optical signal 140 generated from the optical emitter 110 towards the fire control device 200 during the flight of the projectile 100.
  • FIG. 4 (a) illustrates firing of the projectile 100 aiming a short range target (not shown in the figure) .
  • the path followed by the projectile 100 is relatively flat 300.
  • Yaw enables the projectile 100 to rotate about its vertical axis so as to optimally position the projectile 100 to emit optical signals 140 more effectively in the direction of the fire control device 200, wherein the yaw can be induced on projectiles 100 through a number of well known mechanical factors.
  • the projectile 100 is fired at an angle for long range targets (not shown in the figure) .
  • the axis of the in-flight projectile 100 changes relative to the position of the fire control device 200; thereby allowing the emitter 110 to transmit optical signals 140 in the direction of the fire control device 200.
  • the path followed by the projectile 100 is ballistic 302 as shown in FIG. 4(c) (the figure shows the ballistic profile of 40mm X 53 HV grenade by using PRODAS (PROjectile Design and Analysis System) cross plot) .
  • the optical signals 140 generated by the optical emitter 110 of the projectile 100 are detected by the fire control device 200 using the optical detector 230.
  • the optical detector 230 of the fire control device 200 collects the optical emissions (signals) 140 at pre-determined time intervals after firing.
  • the optical signals 140 emitted by the optical emitter 110 of the projectile 100 at discrete time intervals (tl, t2, t3, t4 and t5) are received by the optical detector 230 and digitally recorded as strobe images 145, as illustrated in FIG. 5.
  • FIG. 6 illustrates actual hit point 500 of the fired projectile 100 and intended target 400.
  • the projectile 100 misses the intended target 400 because of some real time errors such as, for example, occasion to occasion errors, lot-to-lot errors, bore sight misalignment and errors resulting from varying environmental conditions such as wind direction, wind speed and the like.
  • the present invention facilitates in correcting these errors for firing subsequent projectiles 100 to hit the intended target 400 by processing real time observed data.
  • the digitally recorded strobe images 145 are processed by the video (or image) processor 240 of the fire control device 200 to identify actual drift and drop of fired projectile 100 as observed from the fire control device 200.
  • the video processor 240 of the fire control device 200 detects the strobe images 145 at pre-determined time intervals (tl, t2, t3, t4 and t5) after firing of the projectile 100.
  • Video processing software of the video processor 240 distinguishes optical signal 140 from the collected strobe image 145 and measures angular changes that are used to calculate optical location information, wherein the optical location information comprises lateral drift (i.e. xl, x2, x3, x4 and x5) and vertical drop (i.e. yl, y2, y3, y4 and y5) of the projectile at predetermined time intervals (i.e. tl, t2, t3, t4 and t5) as illustrated in FIG. 7.
  • the fire control device 200 also records angular shift in the optical detector 230 using one or more sensors 220 disposed in the fire control device 200.
  • This angular shift is determined by measuring shift in the horizontal (x) direction (i.e. xxl, xx2, xx3, xx4 and xx5) and shift in the vertical (y) direction (i.e. yyl, yy2, yy3, yy4 and yy5) of the optical detector 230 at pre-determined time intervals (tl, t2, t3, t4 and t5), as illustrated in FIG. 8, wherein the angular shift occurs due to gun jump or other post firing movements.
  • Gun jump refers to the movement of the fire control device 200 or weapon 600 at the time of firing the projectile 100. Errors due to gun jump can be solved in a number of ways such as, but not restricted to using software algorithms that detect the image shift or by using sensitive accelerometers or measuring equipments that detect relative change in position of sensors.
  • the angular shift information along with the observed actual lateral drift and vertical drop data is provided to the computer 250 of the fire control device 200.
  • the computer 250 uses this information and the angular position information of the weapon 600 recorded at the time of firing the projectile 100 with software 260 to calculate lateral correction 252 and vertical correction 254 as illustrated in FIG. 9.
  • the lateral correction 252 is a function of total observed lateral drift in the x coordinate (i.e. sum observed lateral drift xl, x2, x3, x4 and x5)
  • vertical correction 254 is a function of total observed vertical drop in the y coordinate (i.e. sum observed lateral drift yl, y2 # y3, y4 and y5) of the initially fired projectile 100 that misses the target 400.
  • the fire control device 200 resets subsequent fire control solutions by using actual observed drift and drop of the improved fire control solution; thereby providing a precise aim point for firing the subsequent projectiles 100.
  • the fire control device 200 establishes a correction factor to modify the calculated fire control solution; thereby providing a more precise aim point for firing a subsequent projectile 100.
  • the fire control device 200 uses the new and improved fire control solution to adjust the azimuth and elevation of aim point of the weapon 600 for firing subsequent projectiles 100 to hit the intended target 400 as illustrated in FIG. 10. Adjustment in azimuth corresponds to angle adjustment of the weapon 600 in horizontal (left or right) direction to hit the intended target 400. Adjustment in elevation corresponds to angle adjustment of the weapon 600 in vertical (up and down) direction to hit the intended target 400. These adjustments provide a precise aim point wherein said precise aim point is identified to the user for firing subsequent projectiles 100.
  • the fire control device 200 when subsequent projectiles 100 are fired, the fire control device 200 repeatedly measures the adjustments in the azimuth and elevation of the aim point and use commonly known mathematical algorithms to improve the precision and accuracy of the corrected aim point by repositioning the weapon 600.
  • FIG. 11 illustrates measurement of various parameters at different points of time during the flight of the projectile. Further, the measurements allow for optional measurement of muzzle velocity variation if needed.
  • TO-o Time duration that fire control solutions are displayed and the weapon is physically positioned
  • T0-n Time when operator initiates firing.
  • TO Moment ammunition is fired (set-back)
  • zl Position of 1 st time measurement (Position A barrel mouth)
  • z2 Position at 2 nd time measurement (Position B Tz2-
  • the weaponry of the invention uses real time data and observations to calculate precise aim point solutions that help in removing errors: for example, errors resulting from varying environmental conditions such as wind direction, wind speed and the like, occasion-to-occasion errors, lot-to-lot errors, bore sight misalignment and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

L'invention porte sur un procédé et sur un système destinés à améliorer la précision et l'exactitude d'armes. Selon ce procédé et ce système, des informations de position angulaire du dispositif de commande de mise à feu et des informations de position optique des signaux optiques émis pendant le vol d'un projectile sont traitées par un logiciel en vue de calculer et de fournir un point de pointage précis sur lequel tirer un ou des projectiles ultérieurs.
PCT/US2008/011122 2007-09-28 2008-09-24 Méthodologie d'alignement de ligne de visée et de correction de points de pointage balistiques à l'aide d'un traceur optique (stroboscope) Ceased WO2009094004A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99588907P 2007-09-28 2007-09-28
US60/995,889 2007-09-28

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WO2009094004A1 true WO2009094004A1 (fr) 2009-07-30

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577561A (en) * 1982-04-19 1986-03-25 Bei Electronics, Inc. Digital time fuze method and apparatus
US4710028A (en) * 1985-06-17 1987-12-01 Aerospatiale Societe Nationale Industrielle System for locating a body in motion
US4885977A (en) * 1987-01-07 1989-12-12 State Of Israel-Ministry Of Defence Armament Development Authority Stabilized line-of-sight aiming system for use with fire control systems
US5042743A (en) * 1990-02-20 1991-08-27 Electronics And Space Corporation Apparatus and method for multiple target engagement
US5647559A (en) * 1994-07-16 1997-07-15 Rheinmetall Industrie Gmbh Apparatus for flight path correction of flying bodies
US5988645A (en) * 1994-04-08 1999-11-23 Downing; Dennis L. Moving object monitoring system
US6298841B1 (en) * 1995-06-19 2001-10-09 Richard T. Cheng Paintball gun and light emitting projectile-type ammunition for use therewith
US20050034627A1 (en) * 2003-03-24 2005-02-17 Manole Leon R. System and method for a flameless tracer/marker utilizing an electronic light source
US20050262993A1 (en) * 2002-10-03 2005-12-01 Nurse Francis Edward C Targeting systems
US7210392B2 (en) * 2000-10-17 2007-05-01 Electro Optic Systems Pty Limited Autonomous weapon system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577561A (en) * 1982-04-19 1986-03-25 Bei Electronics, Inc. Digital time fuze method and apparatus
US4710028A (en) * 1985-06-17 1987-12-01 Aerospatiale Societe Nationale Industrielle System for locating a body in motion
US4885977A (en) * 1987-01-07 1989-12-12 State Of Israel-Ministry Of Defence Armament Development Authority Stabilized line-of-sight aiming system for use with fire control systems
US5042743A (en) * 1990-02-20 1991-08-27 Electronics And Space Corporation Apparatus and method for multiple target engagement
US5988645A (en) * 1994-04-08 1999-11-23 Downing; Dennis L. Moving object monitoring system
US5647559A (en) * 1994-07-16 1997-07-15 Rheinmetall Industrie Gmbh Apparatus for flight path correction of flying bodies
US6298841B1 (en) * 1995-06-19 2001-10-09 Richard T. Cheng Paintball gun and light emitting projectile-type ammunition for use therewith
US7210392B2 (en) * 2000-10-17 2007-05-01 Electro Optic Systems Pty Limited Autonomous weapon system
US20050262993A1 (en) * 2002-10-03 2005-12-01 Nurse Francis Edward C Targeting systems
US20050034627A1 (en) * 2003-03-24 2005-02-17 Manole Leon R. System and method for a flameless tracer/marker utilizing an electronic light source

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