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
  • F41J5/04—Electric hit-indicating systems; Detecting hits by actuation of electric contacts or switches
  • F41J5/056—Switch actuation by hit-generated mechanical vibration of the target body, e.g. using shock or vibration transducers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
  • F41J1/00—Targets; Target stands; Target holders
  • F41J1/10—Target stands; Target holders
• • 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
  • F41J5/06—Acoustic hit-indicating systems, i.e. detecting of shock waves
• • 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 relates to a device for locating an impact against a transparent interactive surface, by analyzing differences in the propagation time of progressive mechanical waves propagating from the impact.
• Interactive surface means a two-dimensional or three-dimensional surface, capable of changing its shape in the sense of the static and dynamic elasticity of the materials when subjected to an impact such as a touch, a contact force, a mechanical impulse or else a shock, thereby allowing the propagation of progressive mechanical waves detectable using transducers, including surface acoustic waves, from the impact site.
• the surface deformation can be submillimetric not visible to the naked eye. Plastic, glass or metal surfaces are suitable.
• Each of the known interactive surface objects comprises an impact location device using one or more detection techniques. For example, it is known to use:
• resistive techniques according to which two conductive surfaces are brought close to one another, the location being obtained by an electrical contact between the two surfaces during an impact: not only is this solution complex, but it makes the devices fragile capacitive techniques according to which a surface accumulating charges is sensitive to certain contacts (in particular that of a finger) by charge transfer: this solution is also complex and fragile, but it is also insensitive to a certain number of impacts infrared, heat transfer or modulated beam interruption technologies: this solution is complex and particularly expensive.
• the invention thus relates more precisely to a localization device implementing a technology for detecting the propagation of progressive mechanical waves in an interactive surface, in particular with the aid of detectors of the piezoelectric transducer type, based on the measurement of a transit time difference of a wave packet generated by an impact to a plurality of piezoelectric detectors and on the deterministic calculation, using a pre-established mathematical formula, of the position of a source emitting the packet of wave.
• an impact location device comprising:
• a computer programmed to identify moments of detection of the impact in the electrical signals received by the electronic central unit
• a computer programmed to locate the impact in the interactive surface by analyzing the propagation time differences of the progressive mechanical waves resulting from the impact towards the transducers on the basis of the instants of detection of the impact identified.
• the fun or sports applications are limited, such a resistant interactive surface generally not allowing any other interaction than the location of impacts.
• the surfaces with strong interactions in particular those of display screens of electronic devices such as mobile phones, digital tablets, or other displays of fixed or portable computers, privilege the resistive or capacitive techniques and are of this type. is fragile (resistive techniques) or insensitive to impacts (capacitive techniques).
• a device for locating an impact against a transparent interactive surface capable of propagating progressive mechanical waves from the impact comprising:
• a computer programmed to locate the impact in the transparent interactive surface by analyzing differences in the propagation time of the progressive mechanical waves resulting from the impact towards the transducers on the basis of the identified moments of detection of the impact,
• a protective case integral with the transparent interactive surface and whose interior volume is intended to receive at least a portion of an electronic device with a display screen in a provision according to which the display screen is placed in view; on the interactive surface transparent, the protective case having an opening through which said at least a part of the electronic device can be inserted,
• a computer programmed to convert the location of the impact in the transparent interactive surface into a location of the impact in the display screen when the said at least one part of the electronic device is inserted into the protective case and when the Display screen positioning is set.
• the protective case is shaped to receive in its interior volume one of the elements of the set consisting of a mobile phone, a digital tablet, a flat screen computer support notebook stand, a computer monitor, a television receiver and a video projector associated with a rear projection screen.
• the transparent interactive surface is designed in a material of sufficient rigidity, especially polycarbonate, so that the impact does not significantly affect the display screen of the electronic device when the positioning of the screen display is set.
• one of the walls of the protective housing comprises the transparent interactive surface and the inner volume of the protective housing is intended to receive at least the display screen of the electronic device.
• an impact locating device may comprise a closure element of the opening through which the display screen can be inserted, in particular a sealing member.
• an impact locating device may comprise:
• the transparent interactive surface is designed to have a forward inclination of a non-zero angle with respect to the vertical when the protective casing is placed on a stable support, and
• a receptacle is arranged to collect projectiles whose path is deflected by the inclined transparent interactive surface.
• the receptacle includes a damping material and is removably mounted and / or pivotally connected to the protective case.
• an impact locating device may comprise the electronic device connected to the electronic central unit and at least one of said computers may be integrated into computing means of the electronic device.
• a diverging lens is interposed between the display screen of the electronic device and the transparent interactive surface, when the said at least part of the electronic device is inserted into the protective casing and when the positioning of the display screen is set, and - a rear projection sheet is extended on an inner face of the transparent interactive surface.
• FIG. 1 and 2 show schematically in front and side views the general structure of an impact locating device according to a first embodiment of the invention
• FIGS. 3 and 4 show diagrammatically in side views the general structure of an impact locating device according to a second embodiment of the invention
• FIGS. 5 and 6 show schematically in front and side views the general structure of an impact locating device according to a third embodiment of the invention
• FIG. 7 is a schematic side view of the general structure of an impact locating device according to a fourth embodiment of the invention.
• FIG. 8 shows schematically in side view the general structure of an impact locating device according to a fifth embodiment of the invention.
• the impact locating device shown diagrammatically in front and side views in FIGS. 1 and 2 comprises a protective casing 10, a front face of which consists of a transparent interactive surface 12 able to propagate progressive mechanical waves to from an impact P.
• transducers PT A , PT B , PT C and PT D are arranged and distributed against the transparent interactive surface 12, more precisely at the four corners of the rectangle that it forms. They are designed to capture the progressive mechanical waves propagating in the interactive surface 12 and turn them into electrical signals. They are connected to an electronic central unit 14, for example fixed to the bottom of the protection housing 10, a computer receives their electrical signals and is programmed to identify moments of detection of the impact P in the electrical signals received.
• the electronic central unit 14 furthermore comprises a computer programmed to locate the impact P in the transparent interactive surface 12 by an analysis of the propagation time differences of the progressive mechanical waves resulting from the impact P towards the PT A , PT transducers. B , PT C and PT D based on the identified impact detection instants.
• the two aforementioned calculators can form only one, the distinction being purely functional. They may be in the form of one or more microprocessors programmed to perform a number of functions that can be implemented using computer programs, that is to say in the form of a device. computer science. But these functions could also be at least partly micro programmed or micro wired in dedicated integrated circuits. Thus, alternatively, the computer device implementing the aforementioned computers could be replaced by an electronic device composed solely of digital circuits (without a computer program) for performing the same functions. Note also that, in general, the transparent interactive surface 12 is any, not necessarily rectangular. The number of transducers is also arbitrary, at least equal to three to allow localization by analyzing the differences in propagation time as taught in US 6,367,800 B1.
• the protective housing 10 has an interior volume for receiving an electronic device 16 with a display screen 18 in an arrangement according to which the display screen 18 is placed in a screw position. to the transparent interactive surface 12.
• the transducers PT A , PT B , PT C and PT D are arranged so as not to be in the area of the display screen 18.
• the protective case 10 has an opening 20 through which the electronic device 16, for example a mobile phone or a digital tablet, can be inserted.
• it may further comprise a closing element of the opening 20, in particular a hermetic closure element for external use or even under water. It is advantageously sized, in size and format, to fit precisely to the dimensions of the electronic device 16 that it is intended to receive.
• Means 22 for adjusting a positioning of the display screen 18 with respect to the transparent interactive surface 12, for a centering of the display screen 18 on a reference R linked to the transparent interactive surface 12, are provided in the protective housing 10.
• This centering of the display screen 18 on the R mark includes a complete registration of the markings of the display screen 18 on the marks of the transparent interactive surface 12.
• the centering includes by default a control of these six degrees of freedom by means of the adjustment means 22.
• they are mechanical, specifically four in number, integral with the four side walls of the protective housing 10 and consist of spring systems and wedges, for a centering with two degrees of freedom only ent (horizontal and vertical directions).
• the adjustment means 22 may be designed in the form of any means known equivalent settings controlled manually or electronically, such as screw and nut systems, cylinders or other.
• the reference R is for example a very fine marking of diagonals, whose ends are for example centered on the transducers PT A , PT B , PT C and PT D , on the transparent interactive surface 12, but it can also be another type of marking, for example at least a simple cross marking at least one point, for example located in the center of the front face of the protective housing 10, more or less discrete and to be defined according to the design constraints of the housing 10.
• a software embedded in the electronic device 16 can then come to position a visual cue on the display screen 18 in correspondence with the R mark during an initialization performed after positioning. This initialization advantageously allows a geometric calibration of the transparent interactive surface 12 with respect to the display screen 18.
• the adjustment means 22 associated with a geometric calibration allow the insertion and maintenance of a large variety of electronic display screen devices (telephones, tablets, computers ...), making the protective housing 10 adaptable to several sizes and screen formats.
• the software embedded in the electronic device 16 mentioned above can then be designed to position at least three visual cues respectively on these marked points, with the mouse, using direction arrows of a keyboard, using a command or any other known equivalent interactive tool. After positioning these marks, the calibrated centering of the display screen 18 on the transparent interactive surface 12 by resetting their respective marks can be easily calculated. Such centering made by software can advantageously supplement or even replace a mechanical adjustment.
• the mechanical adjustment means 22 may be replaced by setting means combining markings and software calculations, integral with the protective housing 10 in that they comprise the markings made on the transparent interactive surface 12.
• the transparent interactive surface 12 is advantageously designed in a material of sufficient rigidity, in particular polycarbonate, so that the impact P does not significantly affect the display screen 18 of the electronic device 16 when the positioning of the screen display 18 is set, in particular for an impact of a few joules.
• it also makes it possible to exploit all the resources of the electronic device 16, such as any on-board camera (s), microphone (s), loudspeaker (s), and its display screen 18 and its ability to access the Internet, for optimized interactivity in visual and sound animations depending on the intended applications (play, sports or other).
• the electronic central unit 14 comprises a computer programmed to convert the location of the impact P in the transparent interactive surface 12 into a location of the impact P in the display screen 18 when the electronic device 16 is inserted. in the protective housing 10 and when the positioning of the display screen 18 is adjusted using the means 22.
• this calculator can be different from the two aforementioned computers or form one with them , the distinction being purely functional. It can also be implemented indifferently in a computer or electronic device.
• USB connection Universal Serial Bus
• the electronic central unit 14 can transmit the results of its calculations to the electronic device 16.
• the electronic device 16 can provide the power supply necessary for the operation of the electronic central unit 14, although this can also have its own autonomous and rechargeable source of electrical energy for example secured to the protective housing 10.
• the electronic central unit 14 may have none of the aforementioned three computers, in which case it merely transmits the signals it receives from the transducers PT A , PT B , PT C and PT D to the electronic device 16 for processing , after possibly amplified and compared to predetermined thresholds, then digitized.
• the electronic central unit 14 may comprise only the first of the three computers mentioned above, in which case it transmits the moments of detection of the impact P that it has identified to the electronic device 16 so that it itself calculates the location of this impact P.
• the electronic central unit 14 may not include that the first two of the aforementioned three computers, in which case it transmits the location of the impact P that it has calculated in the transparent interactive surface 12 to the electronic device 16 so that it converts itself into a location in the display screen 18.
• one of the above-mentioned computers can estimate a power of the impact P in addition to its location, simply by integrating the signals received by the electronic central unit 14.
• the protective housing 10 may comprise conventional latching elements 24 at the rear, for attachment against a vertical support. In general, it is easily transportable with the electronic device 16 with a display screen 18 when the latter is precisely positioned and fixed by the adjustment means 22.
• the impact locating device has a front face inclined towards the front, for example a non-zero angle between 5 and 25 degrees, relative to the bottom of the protective housing 10, so as to have the same inclination relative to the vertical when the protective housing 10 is disposed on a stable support.
• the transparent interactive surface 12 is inclined at the same angle.
• the electronic device 16 once inserted and positioned in the protective housing 10 must be in a disposition such that its display screen 18 remains vertical to facilitate its visibility by a user. This results in a parallax error which can be corrected, from a knowledge of this inclination, in the conversion calculation of the location of the impact P.
• this non-zero angle can deflect the trajectory of the projectile avoiding any bounce likely to injure the user.
• a receptacle 26 may also be arranged in the lower part of the transparent interactive surface 12, this receptacle 26 including a damping material 28, for example a foam plate, to collect projectiles deflected by the front face of the protective housing 10. It may further be shaped to fit as a cover to the dimensions of the transparent interactive surface 12 in the storage position of the device. impact location. It can be removably mounted and / or pivotally connected to the protective housing 10. It is shown in the deployed position ready for use in Figure 3 and in the storage position, closed against the transparent interactive surface 12, in the figure 4.
• a damping material 28 for example a foam plate
• the impact locating device comprises a protective housing 30 shaped to receive a keyboard support 32 of a laptop 34 further comprising a flat display screen holder 38 pivotally connected to the keyboard holder 32.
• the rear face 40 of the protective case 30 has an opening through which the keyboard holder 32 can to be inserted.
• the protective housing 30 is secured, by the upper edge of its rear face 40, with a transparent interactive surface 42 which extends upwards at a non-zero angle, for example between 5 and 25 degrees, relative to the vertical.
• the transparent interactive surface 42 is sized to correspond to the dimensions of the display screen 38 of the portable computer 34.
• a parallax error that can be corrected from a knowledge of this inclination, in the conversion calculation of the location of the impact P.
• a shim 43 can be arranged between the transparent interactive surface 42 inclined and the display screen 38 and maintained vertical.
• the transparent interactive surface 42 is as previously provided with the four transducers PT A , PT B , PT C and PT D and the mark R.
• the protective case 30 comprises as in the preceding examples an electronic central unit 44 connected to the four PT A , PT B , PT C and PT D transducers and connected to the laptop 34, and means 46, 48, 50 for adjusting a positioning of the keyboard support 32 in the protective housing 30 for centering of the display screen 38 on the reference R of the transparent interactive surface 42.
• these adjustment means comprise a plate 46, intended to receive the keyboard support 32, adjustable in height by means of a worm-gear system 48, and two lateral systems 50 with springs and shims for horizontal centering.
• a locknut can also be provided to ensure a locking of the positioning of the display screen 38 when it is correctly arranged relative to the mark R.
• a receptacle 52 may also be arranged above the protective housing 30 in front of the transparent interactive surface 42, this receptacle 52 including a damping material 54, for example a foam plate, to collect missiles deflected by the transparent interactive surface 42.
• a damping material 54 for example a foam plate
• FIG. 7 Another embodiment of the invention illustrated diagrammatically in FIG. 7 in side view differs from the first embodiment of FIGS. 1 and 2 in that a diverging lens 56 is interposed between the display screen 18 of the device 16 and the transparent interactive surface 12 and that a rear projection sheet 58 is extended on the inner face of the transparent interactive surface 12.
• a diverging lens 56 is interposed between the display screen 18 of the device 16 and the transparent interactive surface 12 and that a rear projection sheet 58 is extended on the inner face of the transparent interactive surface 12.
• This allows the use of an electronic device 16 with a small display screen 18 (For example a mobile phone or a digital tablet) in a large transparent protective surface 10 with a large transparent transparent surface area 12.
• the images displayed by the display screen 18 are in fact enlarged by the diverging lens 56 to be adapted to the size of the transparent interactive surface 12.
• a short focal lens is preferably used to have a protective case 10 of pro foundry as low as possible.
• the disadvantage of this type of lens is the distortion of the image, but it can be compensated by software as is commonly practiced for some projectors.
• the overhead projection sheet it may be a simple sheet of tracing paper or a more efficient sheet as it exists in a manner known per se in the trade.
• the protective housing 10 is advantageously opaque.
• the transparent interactive surface 12 can be tilted forward and a receptacle with damping material can be arranged in front of, to collect projectiles deflected by the transparent interactive surface 12.
• FIG. 8 Another embodiment of the invention illustrated diagrammatically in FIG. 8 in side view differs from the embodiment of FIG. 7 in that the mobile telephone type electronic device 16 or a digital tablet is replaced by a video projector 60.
• a video projector 60 This solution is possible because today there are very compact projectors at reduced costs.
• the divergent lens 56 is unnecessary since there is one integrated in the Projector 60.
• the latter is advantageously connected to a USB port 62 disposed at the bottom of housing 10 which allows an electrical connection to a computer or a digital tablet. Such a connection can supply it with electrical energy. It can also have a power supply autonomous in the housing or by connection to the sector.
• the correct positioning of the projector 60 with respect to the reference R of the transparent interactive surface 12 can be done during manufacture, but it is also advantageously adjustable using the means 22.
• the protective case may be shaped to receive in its interior volume a flat screen support for a laptop, a computer monitor or a television receiver.
• a musical application using chopsticks and an impact locating device according to the invention in which a connected electronic device such as a smartphone or a digital tablet is inserted, this connected electronic device can be transformed; in a drum simulator, xylophone or other percussion instrument; each localized and calibrated impact sounds as if the user had a real percussion instrument; it can also guide the user by providing him sequentially via the display screen the areas to be reached and the force of the impact; for more realism, the user can use a smartphone to simulate a first musical instrument and a digital tablet to simulate a second musical instrument, the two devices can then be connected by Bluetooth link,
• the impact location device is hung on a wall, players can use real arrows or darts with end protection or simple pens; the display screen of the electronic device disposed in the protective case displays a dartboard and, when an impact is located, is superimposed on the image of the target, the virtual image of the arrow or dart planted where the impact was detected; we can then count the points and possibly identify the players and their approximate distance via the camera of the electronic device by image processing, -
• a shooting game the display screen of the electronic device disposed in the protective housing can display an active scene, for example a duck that flies; using a ball gun, a player can reach the duck which causes for example an animation and a count of points; we can also use several connected electronic devices for more interactivity (digital tablet in front of the player and behind him, ...); in a multiplayer mode, projectiles of different natures can be used to identify by the signature of the impact the different players and thus their respective actions on the same interactive surface, - etc
• an impact locating device such as one of those described above makes it possible to combine the simplicity and the resistance of a wave detection impact localization device at a lower cost and with complete safety.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Casings For Electric Apparatus (AREA)
• Telephone Set Structure (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=57583289

Family Applications (1)

Country Status (4)

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Family Cites Families (9)

• 2016
  • 2016-10-11 FR FR1659777A patent/FR3057368B1/fr not_active Expired - Fee Related
• 2017
  • 2017-10-06 EP EP17786986.4A patent/EP3526540A1/de not_active Withdrawn
  • 2017-10-06 WO PCT/FR2017/052743 patent/WO2018069607A1/fr unknown
  • 2017-10-06 US US16/340,747 patent/US20190234714A1/en not_active Abandoned

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