EP1323999A2 - Geschossfangeinrichtung mit einer elektronischen Zielscheibentrefferauswertung sowie ein Verfahren dafür - Google Patents

Geschossfangeinrichtung mit einer elektronischen Zielscheibentrefferauswertung sowie ein Verfahren dafür Download PDF

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Publication number
EP1323999A2
EP1323999A2 EP02380261A EP02380261A EP1323999A2 EP 1323999 A2 EP1323999 A2 EP 1323999A2 EP 02380261 A EP02380261 A EP 02380261A EP 02380261 A EP02380261 A EP 02380261A EP 1323999 A2 EP1323999 A2 EP 1323999A2
Authority
EP
European Patent Office
Prior art keywords
image
target
ball
trapping device
impact
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Withdrawn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
EP02380261A
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English (en)
French (fr)
Other versions
EP1323999A3 (de
Inventor
Francesc Casas Salva
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.)
Industrias El Gamo SA
Original Assignee
Industrias El Gamo 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 Industrias El Gamo SA filed Critical Industrias El Gamo SA
Publication of EP1323999A2 publication Critical patent/EP1323999A2/de
Publication of EP1323999A3 publication Critical patent/EP1323999A3/de
Withdrawn legal-status Critical Current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
    • F41J13/00—Bullet catchers
    • F41J13/02—Bullet catchers combined with targets
    • 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
    • F41J5/10—Cinematographic hit-indicating systems
    • 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
    • F41J5/14—Apparatus for signalling hits or scores to the shooter, e.g. manually operated, or for communication between target and shooter; Apparatus for recording hits or scores

Definitions

  • the present invention refers to a ball-trapping device which has associated electronic means for accurately detecting the position of successive impacts on a target and for displaying the scores on a screen.
  • Said electronic means can be connected to one or more remote centres for competing with other users or for participating in shooting games.
  • the invention also refers to a method used for carrying out such detection.
  • the ball-trapping devices also called ball-catching devices, are well known since certain time ago and they consist in a casing made of a material having impact strength and provided with an open front face having means for removably fastening a target covering such open face.
  • the target is typically a sheet material, such a paperboard or stiff paper, through which the projectiles can go and on which external face a motive to be shot is depicted, such as several concentric rings around a central disk.
  • the user may shoot the target and the projectiles, generally plastic or lead balls, are collected within the casing after crossing said sheet material.
  • the target is very damaged because of a large number of impacts it is replaced by a new one.
  • the utility model ES-A-1023727 is an example of one of such ball-trapping device which, in this case is dismountable.
  • the holes produced by each successive shot on the target evidence the place of the impact and the target can be visually checked for assessing the level of aim.
  • the holes are not clean but show tears on their edges and often a new shot very close to another one modifies the hole pierced by such former shot without producing a new hole. All this makes the reading of successive impacts on the target difficult.
  • the utility model ES-A-1001945 discloses a device in which the casing has a central face with a plurality of openings arranged according to a geometric pattern and a slot for introducing and withdrawing a sheet constituting a target, on which a series of numbers, graphics or colours have been printed which coincide with such openings and which can be seen through them.
  • Such graphic target further comprises a printed-circuit board connected to an electronic panel which has built-up a high visibility scoreboard showing the scores.
  • the utility model does not disclose which means are used for converting the impacts of the projectiles in electronic signals which may be handled by such printed-circuit board.
  • the patent ES-A-8305921 discloses a process and a device for assessing the level of aim on a target.
  • the apparatus comprises a device to pass different printed target on a band through the open front face of a casing and two detection systems. One of those systems is kept in position close to the travel path of a target and it is used for measuring the distance from an entrance hole at the centre of the target in the direction in which the target is travelling through the apparatus.
  • the other system is mounted on a cross sliding element and is displaceable in straight angle in the direction in which the target is travelling and it measures the distance from the hole to the centre of the target in such cross direction.
  • the two distances are vectorially added by a computer and the result is multiplied by a calibrating factor.
  • the end score can be displayed on a screen or printed.
  • Such detection systems comprise orthogonally arranged photoelectric barriers.
  • This system only allows determining the position of a single hole on the target; therefore, it is required to replace the target after each shot.
  • a great number of sensors is required which results in the apparatus having a high price.
  • such great number of sensors generates a relatively high power consumption which makes unworkable to supply the device with cells or reloadable batteries, preventing its power autonomy.
  • the patent ES-A-2025007 let know a system for obtaining a reading of the game surface of a real target, although in this case it is an electronic machine for a darts game.
  • the system includes two imaging digital cameras arranged at 90° from each other and each encompassing the whole of the front surface of the target where the darts are stuck.
  • the signals of both cameras are treated in a module of a CPU to provide as a result a two dimensional image of the target with the darts stuck displayed on a viewing screen.
  • this device uses imaging electronic cameras for reading the target, the result obtained is a two-dimensional image thereof but such image does not offers the calculated position on coordinates of each successive shot.
  • An object of the present invention is to provide a ball-trapping device having an electronic detection of the impact on a target provided with a digital camera for taking images of the target back face, from which electronic means are able to implement a method for detecting the centre of each successive impact.
  • Another object of the present invention is to provide a self-powered ball-trapping device with electronic detection of the impact on a target and which can be connected to a local or remote receiving and/or retransmitting centre to display the scores and/or participate in shot games competing with other local or remote players.
  • Still another object of the present invention is to provide a detection method to be used with the above ball-trapping device.
  • a ball-trapping device of the kind which comprises a casing, of a material having strength to the impacts, with a front face having an opening and means for removably fastening a target covering such opening.
  • This target is typically a sheet of material through which the projectiles can go and on which external face a motive to be shot is depicted.
  • the ball-trapping device includes electronic means associated at least partly to said casing, for detecting the position of at least one impact on said target.
  • Such electronic means essentially comprise an electronic camera provided with a corresponding focusing lens for taking images, an image treating unit, and a centre for data receiving and/or retransmitting, which can be associated with a viewing screen.
  • Said electronic camera is arranged within the casing in a protected chamber formed at least partly by a transparent wall, encompassing in its focal field the back face of the target for taking images of each of successive shots after it occurs.
  • the material of which the target is made is sufficiently opaque in order to provide a dark ambience within the casing in said back face of the target contrasting with an external natural or artificial illumination, necessary for shooting practice. Thanks to this, any hole in the target is obtained by the camera as a light spot on a dark background. Thus, the impact of each successive shot produces a new hole or a modification of a previous hole which is obtained by the image-taking camera.
  • the successive images obtained are handled by said image treating unit to determine the projectile geometric centre at each successive impact, the scores are displayed on said viewing screen associated with the mentioned data receiving and/or retransmitting centre and/or are retransmitted through a telecommunication network to one or more remote centres to be shown or compared to scores obtained by other remote users with which it is possible to compete.
  • the processing of the images obtained preferably comprises a prior step of calibrating the position of the image depending on a parameter such as a printed mark on the back face of the target or control holes and the processing is performed by means of image processing algorithms and artificial intelligence operations, and by means of comparing the images obtained with images stored in a memory associated with said image treating unit.
  • Said algorithm comprises first storing in a memory the image obtained after a first shot; then passing the successive images obtained to a treating unit wherein a grey scale intensity comparison between each new in-coming image and the last memory-stored image is performed; and last, storing each new image resulting from comparison by rejecting or replacing the image of the former shot.
  • two vectors X and Y are obtained which are filtered with a filtering gauge depending on the kind of ammunition and shot to be detected, said filtering gauge being retrieved from an empiric database of filtering patterns.
  • the impact central point is determined from thresholds in the grey scale.
  • a second database is used to counterbalance the central point determined with techniques of artificial intelligence based on back-propagation neuronal networks. Such central point is obtained with reference to a corner of the image.
  • the method of the present invention includes a function which comprises to pick-up by means of a microphone a noise produced by each successive impact within the casing, which is an indicative that the shot did occur and that a new image of the target back face has to be obtained.
  • the image obtained corresponding to the same shot which produced the last noise is compared as explained above with the stored image corresponding to the former shot. In the case of no difference can be seen between such two consecutive images, the system issues a warning about the convenience of replacing the target.
  • the image treating unit is built-in within the casing and comprise a digital signal processor DSP having associated memories for storing images and processing them on the base of neuronal networks while said data receiving and/or retransmitting centre is a local computing centre associated with a viewing screen located close to the place from which the user is shooting.
  • the result from the impact detection is transmitted through suitable transmitting means from the image-treating unit, within the casing, to said local computing centre.
  • Said transmitting means can use different means such as a connecting cable, infrared rays or radio-frequency waves.
  • the local computing centre can be any digital computer device of those generally available in the market, such as personal digital assistant PDA or a personal computer PC, which is provided, according to the cases, with a cable connecting port, an infrared receiver or a radio-frequency wave receiver.
  • the image-treating unit is located at a place external from the casing.
  • the treating unit preferably comprises a digital signal processor DSP having associated memories for storing images and processing them on the basis of neuronal networks, a cable connection being provided between the electronic camera and the image-treating unit.
  • DSP digital signal processor
  • Such external image-treating unit is integrated in a personal digital assistant PDA or personal computer PC which also carries out the functions of the data receiving and/or retransmitting centre.
  • the electronic camera is constituted by a CCD device having MOS technology and the power consumption of the camera and image data treating unit, when included in the casing, is relatively low.
  • This allows to supply electric power to such systems by means of one or more batteries or cells associated with said casing, therefore the ball-trapping device is self-powered.
  • said cable connection to the local computing unit it is also possible to supply such systems through an electric line included in such cable and from the power supply of the computing unit itself.
  • Another variation includes an input in said casing for connection to an external power supply to power supply those systems that would require it.
  • the ball-trapping device has a part designed to support and show the target, which is similar to that of the conventional ball-trapping devices.
  • This part comprises a casing 1, of a material having impact strength, with a front face provided with an opening and means for removably fastening a target 2 covering such opening.
  • Said fastening means are, in the illustrated example, small wings 15 arranged on three edges of said opening so that they form slots in which the target 2 can slide.
  • the target 2 is in the form of a sheet of a material through which the projectiles can go and on which external face a motive to be shot, such as several concentric rings around a central disk, is depicted.
  • the ball-trapping device of the present invention further comprises electronic means for detecting the position of each successive impact on the target 2 and show the scores.
  • a part of such electronic means can be placed in a chamber within or associated with said casing 1 and the other part is placed outside the casing 1, at a local or remote place.
  • the components associated with the casing 1 essentially comprise an electronic camera 3 with a focusing lens 16 for picking-up the images and an image-treating unit 4 connected to the camera 3 for electronically processing the images obtained.
  • the electronic camera 3 is arranged in a protected chamber 8 formed at least partly by a transparent wall 9, of a material such as reinforced glass, so that the camera 1 encompasses in its focal field the back face of the target 2 to pick-up after each shot successive images of said back face where new holes or modifications of previous holes are successively appearing produced by the successive impacts.
  • the electronic camera could be arranged within a protected housing, linked to the casing 1 through an arm or the like, stiff enough to provide stability to the image, for encompassing in its focal field the front external face of the target and taking images of them.
  • the image treating unit 4 comprises a digital signal processor DSP having associated memories for storing images and processing them on the basis of neuronal networks, and although it is not essential, it is advantageously located within said protected chamber 8, a compact ball-trapping device with a set of casing 1 including the electronic image pick-up and treating means 3, 4 being formed.
  • the image-treating unit 4 is adapted to determine the geometric centre of the projectile at each successive impact from a processing of the images obtained by the camera 3 applying the method of the present invention, which will be described below with reference to Fig. 3.
  • the electronic camera is preferably constituted by a CCD device with MOS technology.
  • the image treating unit 4 is connected by suitable transmitting means, such as a connecting cable 5, to a data receiving and/or retransmitting centre 6 connected to a viewing screen 13, where are displayed the results of the impact detection corresponding to each successive shot.
  • a data receiving and/or retransmitting centre is a local computing centre 6, such as a personal digital assistant PDA or a personal computer PC, provided with an input port for cable connection and a connection to a telecommunication network 11, such as Internet, for retransmitting said results to a remote computing centre 7 associated with a viewing screen 14, which can be, for example, another personal digital assistant PDA or a personal computer PC to which is connected another ball-trapping device with target impact electronic detection used by another remote user.
  • the local computing centre 6 is located close to the user who is shooting and for this the connecting cable 5 constitutes a cheap and reliable signal transmitting means.
  • other more sophisticated wireless transmitting means can be used such as an infrared ray or a radio-frequency wave emitter associated with the casing 1, for which the personal digital assistant PDA or the personal computer PC must be provided with an infrared ray or radio-frequency wave receiving port.
  • such image treating unit 4 is located in a place external from the box 1, for example, close to the user who is hooting, and comprises a digital signal processor DSP having associated memories for storing the images and processing the same on the basis of neuronal networks preferably integrated in a personal digital assistant PDA or a personal computer PC which also has the function of the data receiving and/or retransmitting centre 6 and/or 7 of Fig. 2.
  • a digital signal processor DSP having associated memories for storing the images and processing the same on the basis of neuronal networks preferably integrated in a personal digital assistant PDA or a personal computer PC which also has the function of the data receiving and/or retransmitting centre 6 and/or 7 of Fig. 2.
  • a personal digital assistant PDA personal digital assistant
  • PC personal computer PC which also has the function of the data receiving and/or retransmitting centre 6 and/or 7 of Fig. 2.
  • the ball-trapping device includes a microphone 10 within the casing 1 to pick-up a noise produced by each successive impact.
  • a noise confirms the occurrence of each shot on the target and, in addition, in combination with the image corresponding to same shot it serves for determining when the target 2 is so damaged that it is necessary to be replaced, as described below in relation with the method of the invention.
  • the ball-trapping device at least the set of the casing 1 and associated electronic image pick-up and treating means 3,4 is energetically autonomous as possible.
  • the casing 1 can include an input for a connection to an external power supply.
  • the electronic camera 3 picks-up images from the internal back face, of the target 2, said sheet material of which the target 2 is made is sufficiently opaque in order to the electronic camera 3 can differentiate said holes or modifications thereof from the light which, coming from outside, enters through them, in contrast with the rest of the sheet which remains dark. It is important to "read" the outlines of the holes, which generally have tears, folds, etc which are important to determine the shooting centre. Such reading of the outline is achieved by grey scale comparing with pre-recorded standards.
  • the ball-trapping device includes an external auxiliary source of illumination (not shown) which is applied on the external face of the target. This helps as well the user's vision as the pick-up of images by the camera 3.
  • the method comprises following steps:
  • the method comprises transferring with such communication means 5 the result of treatment with such image-treating unit 4 to a data receiving and/or retransmitting unit, which is a local 6 or remote 7 computing centre.
  • the method comprises a step of calibrating the position of the image as a function of a parameter such as a printed mark or control holes on the target face picked-up by the camera.
  • said algorithm comprises comparing (box 33) the obtained image (box 31), once treated, with the former image (box 41) that is to say, the last image stored in memory, according to their grey scale intensities. Each new image resulting from said comparison is stored replacing the image of the former shot.
  • a projection (box 34) of the impact image resulting from previous comparison on image horizontal and vertical axes is performed, obtaining two vectors X and Y which are filtered with a filtering pattern depending on the kind of ammunition and shot to be detected, with the assistance of an empiric database (box 39) for retrieving such filtering patterns and counterbalancing according to former impacts (box 37).
  • an empiric database box 39
  • the central point of the impact is detected (box 35) or determined from grey scale thresholds.
  • the method comprises the use of a second database (box 40) to carry out a relocation of the central point (box 36) determined in the former operation, using techniques of artificial intelligence (frame 42) based on neuronal networks of back-propagation type, said point being obtained with reference to a corner of the image.
  • the method of the present invention includes a function for determining when the target 2 is so damaged that it is necessary to replace it.
  • This function comprises the steps of: picking-up by means of a microphone 10 a noise produced by each successive impact within the casing 1; comparing (box 33 in Fig. 3) the image obtained (box 31) corresponding to same shot that produced last noise with the image stored corresponding to the former shot (box 40); and in case that a given level of difference is not assessed between such two consecutive images, 3 issue a warning about the convenience to replace the target 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Studio Devices (AREA)
EP02380261A 2001-12-19 2002-12-12 Geschossfangeinrichtung mit einer elektronischen Zielscheibentrefferauswertung sowie ein Verfahren dafür Withdrawn EP1323999A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200102834A ES2189685B1 (es) 2001-12-19 2001-12-19 Cazabalines con deteccion electronica de impacto en el blanco y metodo de deteccion empleado.
ES200102834 2001-12-19

Publications (2)

Publication Number Publication Date
EP1323999A2 true EP1323999A2 (de) 2003-07-02
EP1323999A3 EP1323999A3 (de) 2004-04-21

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EP02380261A Withdrawn EP1323999A3 (de) 2001-12-19 2002-12-12 Geschossfangeinrichtung mit einer elektronischen Zielscheibentrefferauswertung sowie ein Verfahren dafür

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US (1) US20030134700A1 (de)
EP (1) EP1323999A3 (de)
CN (1) CN1427240A (de)
ES (1) ES2189685B1 (de)

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EP1323999A3 (de) 2004-04-21
ES2189685A1 (es) 2003-07-01

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