WO2010012110A1

WO2010012110A1 - Shooting target with electronic shooting position determination

Info

Publication number: WO2010012110A1
Application number: PCT/CH2008/000333
Authority: WO
Inventors: Hansruedi Walti-Herter
Original assignee: Hansruedi Walti-Herter
Priority date: 2008-07-30
Filing date: 2008-07-30
Publication date: 2010-02-04

Abstract

The present invention relates to a target with electronic shooting position determination, wherein the shooting position is determined by way of the propagation time differences of the measurement data supplied by a plurality of acoustic sensors, which detect the sound wave generated by the projectile upon penetrating the target. The target surface is formed by the front of a rubber cloth (1), the back of which is coated with a magnetizable paint and exposed in the main penetration region of the target surface. The back of the rubber cloth rests on a magnetic film (2) in the region of the target surface surrounding the main penetration region and is pressed in a planar manner against the magnetizable paint coating by the magnetic force thereof. The rubber cloth (1) can be displaced with respect to the magnetic film in the contact plane such that when wear occurs the target surface can be replaced by displacing the rubber cloth (1). Said design allows the provision of electronic targets with low operating costs, while at the same time offering considerably improved measuring accuracy compared to the prior art.

Description

Shooting target with electronic shooting position detection

TECHNICAL AREA

The present invention relates to a shooting target with electronic shooting position detection according to the preamble of patent claim 1.

STATE OF THE ART

Shooting targets with electronic shooting position detection are widely used as "electronic targets" for training purposes as well as in shooting competitions.Suns AG, Effretikon, Switzerland, the world leader in such systems, has been operating in this field for several decades invariably systems for

Use in which the sound wave generated by the projectile when passing through the target surface forming physicality is measured by means of several acoustic sensors and then from the transit time differences of the measurement data supplied by the sensors, the weft position is determined. The sensors are arranged in an acoustically shielded chamber, which is bounded on one side by the body forming the target surface. Such shooting targets are described for example in CH 589 835 and CH 609 767.

Since with each shot the corporeality forming the target surface is damaged and thereby the acoustic shielding of the chamber is impaired, this corporeality or at least the perforated area of the same must be destroyed after a certain number of moments

Passages are replaced to ensure trouble-free operation.

In modern plants, this is done by the target surface is formed by a provided from roll rubber cover curtain, which in front of a side of the acoustic chamber forming and cut out in the main bullet zone rubber membrane ange- is orders. If the rubber curtain is damaged by several bullets, a new piece of blanket is simply provided by the roll without having to change the rubber membrane. This suffers, because it is cut out in the area of the main bullet zone, typically much fewer bullets than the blanket curtain and must be changed accordingly less often. This results in such shooting targets the advantage that low operating costs per shot result because the consumable material is essentially limited to the relatively inexpensive blanket from role.

However, it has been found that under certain circumstances, these target targets can be subject to incorrect measurements, namely when the target area in or near the overlapping area is penetrated by the blanket and the rubber membrane.

SUMMARY OF THE INVENTION It is therefore the object, a

To provide shooting target available, which does not have the disadvantages of the aforementioned prior art, or at least partially avoids, at substantially constant low operating costs. This task is determined by the shooting target

Claim 1 solved.

Accordingly, the invention relates to a shooting target having a substantially planar target surface and electronic shooting position detection. The target area is the area visible in the weft direction in which, according to the opinion, the projectiles arrive and the body forming the target area is to pass through. Furthermore, the shooting target has a plurality of acoustic sensors, for example ultrasonic sensors, which detect the sound wave generated by the projectile as it passes through the body forming or providing the target surface. The sensors are equipped with associated niche evaluation unit, with which the weft position from the transit time differences of the measurement data supplied by the sensors can be determined.

The target surface of the shooting target is formed by the front of a first, shootable sheet whose back is free in the region of the target surface in a first region, so that from this back unimpeded propagation of the sound wave can be done to the sensors. The physicality which provides the target surface thus consists exclusively of the claimed first area in the first area according to the claim. In at least a second area in the region of the target surface, the first sheet lies on a second, likewise through-shootable fabric. The first planar structure thus overlaps in this at least one second region according to the invention with the second planar structure, so that the physicality which provides the target surface in this region consists of at least the first and the second planar structure.

Here, the first sheet is in the support plane, i. in the plane in which the two flat surfaces adjoin one another flat against the second sheet, so that the first region, which preferably forms the main bullet zone, can be formed by shifting the first sheet either through different regions of this sheet. As a result, the region of the first area-forming surface forming the target area can easily be exchanged during wear by displacing it.

According to the invention, the firing target has means with which it can be ensured that in the intended operation all over the second area there is at all times a flat contact between the first and the second sheet. Such means prevent lifting of the first sheet of the second sheet by positive engagement and / or oppose a lifting of the first sheet from the second sheet a force. Such claimed means can be formed by separate components, such as permanent magnetic and magnetizable elements or guide elements, or can be realized by appropriate training already existing elements, for example by such elements permanent magnetic or magnetizable formed It has been shown that in the state of the

Technique observed incorrect measurements when shooting through the target surface in or near the overlap region of the first and second sheet in the inventive shooting targets do not occur. Accordingly, the invention enables the provision of shooting targets, which have a significantly improved measuring reliability, while still offering low operating costs.

In a preferred embodiment, the firing target is designed in such a way that the first surface structure is held by frictional contact in surface contact with the second fabric, preferably by magnetic force.

In this case, it is preferred that one of the two fabrics is permanently magnetised in the second region and that the other fabric can be magnetized by it, such that the two fabrics attract each other in the second region. The magnetizable fabric can be formed, for example, from a magnetizable material or from a non-magnetizable material which is coated with a magnetizable layer, in particular with a magnetizable ink. Such a paint is offered, for example, under the name "Magnetic Paint" by the company Doelfray & Macostan, 3900 AX Veenendaal, NL The permanent magnetic sheet may be formed, for example, from a permanent magnetic material or from a non-magnetic material which is coated with a permanent is occupied. Here, for example, the magnetic film type MAFO 550, available from the company Heil in Baar, Switzerland is suitable.

In this way, it is possible to ensure a flat contact between the first and the second sheet structure without further aids.

Preferably, in the aforementioned embodiment, the second sheet is made longer magnetizable and the first sheet is formed magnetizable thereby. Since the permanent magnetic material is typically much more expensive than the magnetizable material, this constellation, in which the actual consumable material does not have to be permanent magnet, results in the lowest operating costs. As a variant of the embodiment of the shooting target, in which the surface contact between the first and the second sheet is ensured by magnetic force, it is preferred that one of the two sheets, and preferably the first sheet, be magnetizable and / or permanent magnetic is and the shooting target one or more magnetic coils or permanent magnets, with which this sheet is magnetizable such that it is pressed in the second region of the second surface structure. Thus, for example, the first sheet may be formed of a magnetizable metal particle-containing blanket or of a blanket coated with a magnetizable ink, which is drawn against the second sheet by means of a magnetic coil arranged in the weft direction on the back side of the two sheets and surrounding the target surface area. As a result, the operating costs can be further reduced because the second sheet, which must also be replaced from time to time, can be made significantly cheaper. In a further preferred embodiment, the shooting target comprises means for generating a pressure difference between the front and the back of the first sheet, such that the first sheet is pressed by the pressure difference in the second region of the second sheet. This can for example be achieved in that the first and the second sheet define a substantially closed space, which is evacuated by means of a fan, that is kept under a slight negative pressure. It is advantageous if the second sheet is formed as stiff as possible in order to minimize the deflection of the target surface in the claim according to the second area. Such an embodiment of the shooting target allows the use of particularly inexpensive materials for the first and second sheets. In yet another preferred embodiment, the shooting target is designed such that the first sheet is held by surface contact in surface contact with the second sheet. This happens preferably in that the first sheet in guides, which on the second

Sheet formations are formed, extends and is prevented by these form-fitting on a lifting of the second sheet in the second region.

Of course, the above-mentioned different embodiments can also be combined with one another, which leads to a particularly secure planar contact of the first fabric with the second fabric in the second region according to the claims. Further, in embodiments in which lifting of the first sheet from the second sheet in the second region is achieved by means other than the above-described pressure difference between the front and back of the first sheet, it is preferred that the first and, preferably Also, the second sheet are formed from an advantageous elastic, pebble-like material. Preferred such materials are, for example Blanket or plastic films, especially made of soft PVC. Furthermore, it is also intended to form these fabrics of paper or cardboard.

In yet another preferred embodiment, the target area of the shooting target has a single, preferably centrally required first area. Such shooting targets according to the invention are particularly suitable as "electronic targets." According to a first variant of this embodiment, it is preferred that the first region is completely enclosed by a single second region, preferably being circular - ments in which the first sheet is pressed by magnetic force or by a pressure difference between the front and back in the second area areally to the second sheet.

According to a second variant of this embodiment, it is preferred that the first region is only partially bounded by second regions, ie the target surface edge is formed both by the first region as claimed and by the second region according to the claims. It is further preferred that the first region is elongated in the direction of displacement of the first sheet, wherein it forms the edge region of the target surface at both ends of its elongated extension and is delimited only by a respective second region on its longitudinal sides. This variant is particularly suitable for embodiments in which the first fabric is prevented from lifting off the second fabric in the second regions by positive locking, since only a positive fit along the longitudinal edges of the first region has to be ensured by this design. BRIEF DESCRIPTION OF THE DRAWINGS

Further preferred embodiments of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Showing:

1 shows a vertical section through a first embodiment of the inventive shooting target.

FIG. 2 is a rear view of the shooting target of FIG. 1; FIG. Fig. 3 is a section along the line A-A in

Fig. 2;

FIG. 4 is an illustration like FIG. 2 of a second embodiment of the shooting target according to the invention; FIG. and Fig. 5 is a section along the line B-B in

Fig. 4.

WAYS FOR CARRYING OUT THE INVENTION

A first shooting target according to the invention in the form of an "electronic target" is shown in FIGS. 1 and 2, once in vertical section along a cutting plane which runs parallel to the shooting direction S (FIG. 1} and once in the rear view As can be seen, the shooting target comprises a frame 19 made of steel sheet, the light opening of which is covered on its front side with a black rubber membrane 2 with horizontal aiming line (not shown), which in its center a circular opening 21. This opening 21 and part of the Gurnτnimembrane 2 are covered on the side facing away from the frame 19 of the rubber membrane 2 with a blanket curtain 1, which is provided by a arranged in the upper frame bolt supply roll 20 and by unwinding from the supply roll 20 by means of a in the lower frame bolt arranged transport roller 14, which by means of an electric drive unit 11 antrei bbar is, is interchangeable. In the back view in Fig. 2, the invisible boundary edges of the blanket curtain are indicated by dashed lines.

As in synopsis with the right beside

Fig. 1 shown enlarged detail is clearly seen, is seen in the firing direction S in front of the rubber membrane 2 and the blanket curtain 1, a target disc 4 arranged in white cardboard, which has a circular opening 22 in its center. This opening 22 defines the size of the intended target area of the shooting target, which is formed by the front side of the blanket curtain (claimed first sheet). Arranged in the firing direction S in front of the target screen 4 is a baffle frame 7 made of aluminum, which protects the frame 19 of the shooting target from damage by projectiles. The target shutter 4 and the bounce frame 7 are held in a bumper holder 8 at the lower edge of the lower frame bolt. On the back of the light opening of the frame 19 is closed with a rear wall 6, so that the frame 19 together with the rear wall 6, the rubber membrane

2 and the blanket curtain form an acoustically shielded from outside space 23. Arranged in this space 23 in the four corners of the frame are acoustic sensors (not shown), which are connected to a measuring electronics 12. The measurement electronics 12 determines the respective weft position from the transit time differences of the measurement data supplied by the sensors when the target surface passes from the projectile and transmits its results via a cable 13 to a display unit (not shown).

As particularly shown in FIG. 2 can be seen in conjunction with FIG. 3, which shows a section along the line AA in FIG. 2, the target surface 22 of the blanket curtain 2 defined by the target panel 4 is larger than the opening 21 in the rubber membrane 2, thus the rear side blanket curtain 2 is free in the area of the target area in a central region (other proper first area) and rests in the edge region on a on the rubber membrane 2 around the opening 21 around circular ring of magnetic film 16 (demanding second sheet). The material of the blanket curtain 1 is coated on its side facing the rubber membrane 2 with a magnetizable ink 15, so that the blanket curtain 1 is attracted by the magnetic force of the magnetic film 16 to this area. In a variant of the previously described

Embodiment of the shooting target is intended to replace the rubber membrane 2 with the ring of magnetic film 16 arranged thereon by a single permanent magnetic corporeality, e.g. through a membrane 2 of permanent magnetic material.

FIG. 4 shows a view like FIG. 2 of a second embodiment of the shooting target according to the invention, which is essentially formed by the design of the rubber membrane 2 and the Gutnmituchvors 1 in particular in the region of the target surface of the in the

Figures 1 to 3 illustrated embodiment differs.

As can be seen from FIG. 4 in conjunction with FIG. 5, which shows a section along the line AA in FIG. 2, here the opening 21 in the blanket membrane 2 is of a long-hole-like design such that the circular one defined by the target screen 4 Target surface 22 of the blanket curtain 1, although wider than this opening 21, but not higher. Correspondingly, here is the back of the blanket curtain 1 im

Area of the target area except for two narrow edge areas (second areas as required) completely free (demanding first area). In the aforementioned two edge regions, the edges of the blanket curtain 1 are guided in arranged on the rubber membrane 2 longitudinal guides, which are each formed by a cover strip 17 on a spacer strip 18. In this way, a lifting of the blanket curtain 1 (according to claim first sheet) in these areas (claims second ranges) of the rubber membrane 2 (claim according to the second fabric) prevented by positive engagement.

While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims. So it is e.g. provided, in the embodiment shown in Figures 4 and 5 to dispense with the longitudinal guides 17, 18 and instead to install in a side wall of the frame 19 a fan which holds the interior 23 under a slight negative pressure, so that the blanket curtain 1 by the pressure difference is pressed between the interior pressure and atmospheric pressure against the rubber membrane 2.

Claims

1. A firing target with electronic firing position determination, comprising a substantially planar target surface for intended firing with projectiles and a plurality of acoustic transducers for measuring the sound wave generated by a projectile as it passes through the target surface providing corporeal sound and an electronic evaluation unit (12) in which the target position can be determined from the transit time differences of the measurement data supplied by the sensors, wherein the target surface is formed by the front of a first fabric (1) whose back is free in the region of the target surface in a first region and in at least one second region a second sheet (2, 16) rests, and wherein the first sheet (1) in the support plane relative to the second sheet (2, 16) is displaceable, characterized in that the shooting target means (15, 16, 17, 18) to ensure a two-dimensional co ntakt between the first (1) and the second sheet (2, 16) in the at least one second region.

2. A shooting target according to claim 1, characterized in that the means (15, 16) for ensuring a surface contact between the first (1) and the second sheet (2, 16) are formed such that the first sheet (1) by KraftSchluss in surface contact with the second sheet (2, 16) is held, in particular by magnetic force.

3. firing target according to claim 2, characterized in that one of the two sheets (1, 2, 16), in particular the second sheet (2, 16), in the second region is permanent magnetic and the other sheet (1, 2, 16), in particular, the first areal structure (1) can be magnetized by it, such that the two areal structures (1, 2, 16) attract one another in the second area.

4. firing target according to one of claims 2 to 3, characterized in that one of the two sheets (1, 2, 16), in particular the first sheet

(1), rαagnetisierbar and the shooting target one or more magnetic coils or permanent magnets, with which this sheet (1, 2, 16) is magnetizable such that it in the second area to the other surface structure (2, 16, 1 ) is pressed.

5. shooting target according to one of the preceding claims, characterized in that the shooting target

Means for creating a pressure differential between the front and the back of the first sheet

(1), such that the first sheet (1) is pressed against the second sheet (2, 16) by the pressure difference in the second region.

6. A firing target according to one of the preceding claims, characterized in that the means (17, 18) for ensuring a surface contact between the first (1) and the second sheet (2) are formed such that the first sheet (1 ) is held in positive contact with the second sheet, in particular by being guided in guides (17, 18) which rest on the second sheet

(2) are formed, runs.

7. Shooting target according to one of the preceding

Claims, characterized in that the first (1) and in particular also the second sheet (2, 16) are made of a particular elastic, pebble-like material, in particular rubber blanket, paper or cardboard.

8. Shooting target according to one of the preceding

Claims, characterized in that a single, in particular central first area is present.

9. shooting target according to claim 8, characterized in that the first region is completely enclosed by a single second region.

10. firing target according to claim 8, characterized in that the first area only partially from limited second areas, and in particular that the first area is elongated and is bounded on its long sides by exactly one second area.