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EP0525733A1 - Procédé et dispositif de détection de la trajectoire d'un projectile - Google Patents

Procédé et dispositif de détection de la trajectoire d'un projectile Download PDF

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Publication number
EP0525733A1
EP0525733A1 EP92112897A EP92112897A EP0525733A1 EP 0525733 A1 EP0525733 A1 EP 0525733A1 EP 92112897 A EP92112897 A EP 92112897A EP 92112897 A EP92112897 A EP 92112897A EP 0525733 A1 EP0525733 A1 EP 0525733A1
Authority
EP
European Patent Office
Prior art keywords
light
airfield
light sources
receiver line
shadow
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Withdrawn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
EP92112897A
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German (de)
English (en)
Inventor
Georg Huscher
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0525733A1 publication Critical patent/EP0525733A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J5/00—Target indicating systems; Target-hit or score detecting systems
    • F41J5/02—Photo-electric hit-detector systems

Definitions

  • the invention relates to a method and a device for detecting the trajectory of a projectile by means of an optical system, which has on one side of the airfield a plurality of point-shaped light sources arranged in a plane parallel to the trajectory and on the other side in a plane arranged parallel to this plane Has light receivers, which are at least partially shaded when passing through the floor and from whose voltage changes at least one coordinate of the floor track is determined.
  • the associated device has two optical systems located one behind the other in the direction of flight, each of which comprises a line of light sources on both sides of the airfield and a discrete light receiver element at the top and bottom end of the line.
  • the e.g. 32 light sources of each of the four light transmission lines in both optical systems each consist of two LEDs, one of which is directed to the upper and one to the lower light receiver of the opposite line.
  • the four light receivers of the first optical system are shaded by at least four LEDs at four different times in the cycle of the emitter lines.
  • the times of shading are assigned by an electronic evaluation device to the respective LED positions for which the respective beam angle to the line direction is programmed, so that the trajectory can be calculated and displayed using trigonometric function terms.
  • Disadvantages are the high expenditure in terms of equipment and software, the difficult adjustment of the four light transmission systems, each of which 4 x 32 LEDs have to be aligned with the four receivers, and the need to specify extremely short cycle times for the line scan when fast-moving projectiles close are detectable.
  • DE-A-1 703 171 discloses another method for determining the trajectory of a projectile, which uses two orthogonal light barrier systems. Each system asked for a light transmission line consisting of discrete light sources and a light receiver line arranged on the other side of the airfield and consisting of discrete light sensors. Exactly one light receiver is assigned to each light source and an optical system consisting of two plano-convex mirrors is still required between the two. The cost of such a detection device is even greater than in the prior art.
  • DE-A-2152 219 represents a simplification insofar as opposite surface radiators are used while maintaining two orthogonal light receiver rows. Since the floor only shadows one photodiode of each receiver line, the accuracy of the measuring system depends on the packing density of the photodiodes.
  • the outlay of the device operating according to the method is extremely low.
  • the length of the light receiving elements need not be smaller in the row direction than the smallest possible shadow length of the projectile, which according to the invention is still larger than the projectile diameter.
  • the evaluation can be carried out in a commercially available PC with AD converter card. Since the evaluation formulas do not require trigonometric function terms, the assembly-based programming of EPROM versions is also made much easier.
  • a single line of light receivers consisting of closely spaced, two-dimensional, rapidly reacting light receivers, the extent of which does not need to be less than the smallest possible shadow in the line, is illuminated by two point-shaped light sources coplanar with the receiver line from the same distance and symmetrically to the perpendicular line of the receiver line.
  • a floor creates two separate shadow images on the line when the two illuminated illuminated fields with the light sources as vertices penetrate the overlapping area, the respective shadow being distributed over one or more receiver elements and causing voltage increases there according to the respective percentage degree of shading. From the proportional increases in voltage, the positions of the shadow centers on the receiver line and, in turn, the projectile path coordinates are determined in a computer in order to finally display the hit value and position.
  • the invention further relates to a device for evaluating hits, the characteristic of which is that, parallel to one side of a pair, preferably rectangular, plane-parallel, at a short distance all around for the purpose of shielding extraneous light, for example metal plates connected to one another with a distance profile, a line of closely spaced, planar photo receivers, preferably photodiodes, is arranged between the plates and that this line is arranged opposite two point-shaped light sources, preferably infrared diodes symmetrical to the perpendicular to the receiver line and also between the metal plates.
  • Two circular breakthroughs in the parallel metal plates have a common axis that intersects the center line of the receiver line at a right angle at a point that is also the center of the circular shot detection field, which lies entirely in the area of intersection of the two angular fields that the light rays from the two point light sources point towards the ends of the recipient line.
  • a projectile that flies through the shot detection field thus always creates two shadow areas with an edge distance on the receiver line, which is always greater than the length of a single element of the receiver line if the distance between the shot detection field and the receiver line is sufficiently large.
  • the device thus comprises, according to the invention, a very simply constructed bombardment detection module, to which a commercially available PC with AD converter card can be connected for evaluation.
  • the projectile can be detected in a known type of bullet trap after passing through the second circular opening.
  • a test disk is placed behind the second opening and, alternatively, a disk simulator of known design can also be flanged on.
  • a cuboid housing has a rectangular front plate 1 with a circular hole 2 and a rear plate 4, which is preferably congruent with the front plate 1, with a hole 5 coaxial with the hole 2 with the z-axis 11 as a common axis, which has a spatial Cartesian axis with the x and y axes Coordinate system forms.
  • Front and rear panels 1, 4 are preferably connected to one another by means of a spacer profile 3.
  • an almost complete line 7 of photodiodes is mounted symmetrically to the x-axis 10 in the xy plane, each with a rectangular light-sensitive surface, such that the line 7 of two on the other Side of the pair of holes 2, 5 also between the plates 1, 4 and also symmetrically to the x-axis 10 mounted transmitter diodes 8, 9 is irradiated.
  • the coordinate origin M is positioned on the x-axis 10 so that the crossed connecting lines W 8 , Wg of the light transmitters 8, 9 with the ends of the receiver line 7 just touch the preferably circular projectile detection area around the center M with radius r.
  • each floor G passing through the detection area parallel to the z-axis 11 generates briefly and simultaneously two shadows with the shadow lengths SL1, SL 2 on the receiver line 7.
  • Line 7, for example, requires only 16 suitable receiver elements Eo ... Ei 5 to be used for air rifle use with tenths of a ring resolution in conjunction with a commercially available 16-channel analog-digital converter card for a PC.
  • On the carrier board 6 is also the system of also 16 known impedance converters with peak value memories.
  • a projectile G After passing through holes 2, 5, a projectile G can pass through a test disc centered on hole 5 or a disc simulator and can be collected in a known bullet trap.
  • the signal evaluation is characterized in that a peak value memory is assigned to each of the individual receiver elements Eo ... Ei 5 , which can hold the maximum voltage corresponding to the local shading during a projectile passage until, for example, by means of a commercially available analog-to-digital converter circuit AD with a corresponding number of input channels, all voltages are digitized and fed to a memory SP.
  • the position Y 1 or Y 2 of the respective shadow center on the receiver line 7 is determined from the receiver elements affected by partial shading and belonging to the same overall shadow by weighted averaging of the associated voltage changes.
  • the hit coordinates x and y are calculated from this using the following formulas:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)
EP92112897A 1991-07-31 1992-07-29 Procédé et dispositif de détection de la trajectoire d'un projectile Withdrawn EP0525733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4125262 1991-07-31
DE4125262 1991-07-31

Publications (1)

Publication Number Publication Date
EP0525733A1 true EP0525733A1 (fr) 1993-02-03

Family

ID=6437345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112897A Withdrawn EP0525733A1 (fr) 1991-07-31 1992-07-29 Procédé et dispositif de détection de la trajectoire d'un projectile

Country Status (1)

Country Link
EP (1) EP0525733A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685701A1 (fr) * 1994-05-05 1995-12-06 Karl Stefan Riener Cible électronique et procédé pour sa mise en oeuvre
US5805288A (en) * 1996-03-05 1998-09-08 Laserscore, Inc. Apparatus for detecting the presence and location of at least one object in a field
US6147759A (en) * 1998-02-04 2000-11-14 Laserscore, Inc. System for detecting the presence and location of at least one object in a field by using a divergent radiation source and an array of opposed plural detectors which rotate together around the field
DE102007020604A1 (de) * 2007-05-02 2008-11-06 Wiest Ag Vorrichtung und Verfahren zur berührungslosen Positionsbestimmung
RU2518853C2 (ru) * 2011-09-13 2014-06-10 Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации Способ определения условий подхода снаряда к мишени и устройство для его осуществления
CN104061822A (zh) * 2014-07-02 2014-09-24 北京机械设备研究所 一种弹道测量用高空悬挂全金属网面靶标
EP2913626A1 (fr) * 2014-03-01 2015-09-02 Patents Factory Ltd. Sp. z o.o. Procédé et appareil pour détecter l'emplacement d'un objet sur une surface virtuelle
RU2661073C1 (ru) * 2017-08-07 2018-07-11 Олег Николаевич Роговенко Способ определения зависимости баллистических характеристик снарядов от режима стрельбы и информационно-вычислительная система для его осуществления

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB817470A (en) * 1955-10-14 1959-07-29 Rank Cintel Ltd Improvements in or relating to non-contact target apparatus
US3401937A (en) * 1965-02-15 1968-09-17 Brunswick Corp Target with scanning projectile sensors
US3624401A (en) * 1969-10-06 1971-11-30 Us Navy Ultraviolet target hit scoring system
US3956627A (en) * 1974-10-29 1976-05-11 Nishi Nippon Denki Co., Ltd. Light beam target and apparatus using the same
FR2404828A1 (fr) * 1977-10-03 1979-04-27 Fraba Gmbh Cible
EP0354284A1 (fr) * 1986-01-31 1990-02-14 Max W. Goodwin Système de marquage et d'affichage pour cible

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB817470A (en) * 1955-10-14 1959-07-29 Rank Cintel Ltd Improvements in or relating to non-contact target apparatus
US3401937A (en) * 1965-02-15 1968-09-17 Brunswick Corp Target with scanning projectile sensors
US3624401A (en) * 1969-10-06 1971-11-30 Us Navy Ultraviolet target hit scoring system
US3956627A (en) * 1974-10-29 1976-05-11 Nishi Nippon Denki Co., Ltd. Light beam target and apparatus using the same
FR2404828A1 (fr) * 1977-10-03 1979-04-27 Fraba Gmbh Cible
EP0354284A1 (fr) * 1986-01-31 1990-02-14 Max W. Goodwin Système de marquage et d'affichage pour cible

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685701A1 (fr) * 1994-05-05 1995-12-06 Karl Stefan Riener Cible électronique et procédé pour sa mise en oeuvre
US5637866A (en) * 1994-05-05 1997-06-10 Riener; Karl S. Apparatus and method for optically detecting and electronically analyzing the location of a projectile in a target plane
US5805288A (en) * 1996-03-05 1998-09-08 Laserscore, Inc. Apparatus for detecting the presence and location of at least one object in a field
US6147759A (en) * 1998-02-04 2000-11-14 Laserscore, Inc. System for detecting the presence and location of at least one object in a field by using a divergent radiation source and an array of opposed plural detectors which rotate together around the field
DE102007020604A1 (de) * 2007-05-02 2008-11-06 Wiest Ag Vorrichtung und Verfahren zur berührungslosen Positionsbestimmung
RU2518853C2 (ru) * 2011-09-13 2014-06-10 Федеральное государственное военное образовательное учреждение высшего профессионального образования "Военный авиационный инженерный университет" (г. Воронеж) Министерства обороны Российской Федерации Способ определения условий подхода снаряда к мишени и устройство для его осуществления
EP2913626A1 (fr) * 2014-03-01 2015-09-02 Patents Factory Ltd. Sp. z o.o. Procédé et appareil pour détecter l'emplacement d'un objet sur une surface virtuelle
CN104061822A (zh) * 2014-07-02 2014-09-24 北京机械设备研究所 一种弹道测量用高空悬挂全金属网面靶标
CN104061822B (zh) * 2014-07-02 2015-07-15 北京机械设备研究所 一种弹道测量用高空悬挂全金属网面靶标
RU2661073C1 (ru) * 2017-08-07 2018-07-11 Олег Николаевич Роговенко Способ определения зависимости баллистических характеристик снарядов от режима стрельбы и информационно-вычислительная система для его осуществления

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