WO2006097098A2

WO2006097098A2 - Electronic hit registering system for fencing

Info

Publication number: WO2006097098A2
Application number: PCT/DE2006/000491
Authority: WO
Inventors: Ruth Gutjahr
Original assignee: Ingenieurbüro Electronic GmbH
Priority date: 2005-03-15
Filing date: 2006-03-15
Publication date: 2006-09-21
Also published as: EP1861179A2; ATE416826T1; DE502006002333D1; EP1861179B1; WO2006097098A3; DE102005012932A1

Abstract

The invention relates to an electronic hit registering system for fencing. The aim of the invention is to provide a solution which enables a reliable recognition of hits for the three types of competitive sport fencing and, in addition, with regard to a greater freedom of movement of the participants, rendering unnecessary the carrying along of a trailing wire or spool wires by the fencer as well as a conductive fencing piste. The aim of the invention is fulfilled by utilizing the capacitive bridge circuit principle, in which the conductive portions of the clothing of the fencers and the weapons depict condenser plates to which an alternating voltage from a unit carried by the fencers is applied. One of the branches of the bridge circuit is provided in the form of electrically conductive trousers worn by the fencers, preferably worn under electrically non-conductive fencing trousers.

Description

Electronic scoring system for fencing

The invention relates to an electronic hit reporting system for fencing. In particular, it relates to a corresponding system which enables hit detection and display without the need for entrainment of a towing or reel cable by the fencers.

In fencing, the problem is that the actions taken by the fencers take place very quickly, often in fractions of a second. This makes it on the one hand the spectators difficult to follow the competition. This is particularly true not least for television broadcasts. On the other hand, and much more importantly, it is also very difficult for judges who have to decide on the outcome of a fencing duel to detect hits at all, and also to distinguish rule-compliant hits from those that are not. For a long time, therefore, one has used technical means for detecting and displaying hits. According to the state of the art, these are signal lamps, which are lit in the event of a hit by closing or opening comparatively simple circuits and thus signal the hit. To implement appropriate circuits, the weapons used and, depending on fencing discipline, worn by the athletes west and / or the fencing train electrically conductive trained. In addition, electrical contact elements are provided in the tips of the weapons, with the exception of the saber. The fencers are equipped with a trailing cable to supply power to each formed circuits, to which they are coupled throughout the fight. As a result, however, the fencers are restricted in their freedom of movement. In addition, it should be noted that due to the rather complicated set of rules in fencing in erroneous orders of the type shown also more false reports are recorded. Last but not least, there is also a certain risk of injury for the fencers due to the tow cable. Therefore, the effort of fencing circles has been around to find better solutions together with technicians.

However, the fact that even today's competition practice still makes use of the above-mentioned principle shows that so far no satisfactory solutions have been found. This is especially true for sporadically proposed solutions for wireless hit detection and / or transmission to display devices. The problem here is not the wireless transmission of corresponding, caused by a hit signals as such, but the sufficiently accurate and reliable hit detection, for the sometimes significantly differing in terms of the rule fencing types saber, sword and foil. Thus, for example, for the foil and fencing fencing already known wireless detection device, but this has found little acceptance in practice so far. In addition, it is not suitable for saber fencing. In saber fencing in particular, hit detection proves to be extremely difficult. A wireless solution for foil and fencing fencing is disclosed in the document DE 298 12 961 U1. Furthermore, a wireless solution is described by EP 1 134 066. Even with this solution, however, problems with regard to reliable hit detection during saber fencing should exist. In addition, it is necessary in the solution shown in this document, the entire fencing equipment, namely both the weapons and the clothing of fencers, form in a special way, so that the previous equipment is not usable for this purpose. From DE 34 03 788 A1, a solution is shown, in which the hit is detected by means of a resistance bridge circuit. Although it is possible to detect hits relatively reliably with this solution, the omission of a roller or trailing cable is not readily possible with it, or is to form the respective second branch of the bridge circuit (1st branch = conductive connection via conductive parts of the bridge Clothing and the appropriate, at least partially conductive weapon) a conductive fencing required. The object of the present invention is therefore to provide a solution which enables reliable hit detection for the three types of fencing carried out in competitive sports and moreover, with regard to greater freedom of movement of the players, the entrainment of a towing or reel cable by the fencers and a conductive Fechtbahn dispensable.

The object is achieved by an electronic hit reporting system with the features of the main claim. Advantageous embodiments or further developments of the invention are given by the subclaims.

The proposed electronic detection system consists essentially of an arrangement for detecting hits, units for the acoustic or optical signaling of hits and transmission units for transmitting a signal generated by the arrangement for detecting the hit signal to the aforementioned units for optical and / or acoustic signaling of hits. The latter signaling units are a central unit on the fencing line and / or units carried by the fencers. The arrangement for detection of hits, the transmission units and possibly carried by the fencers signaling units work self-sufficient, that is, by the fencers, unlike in fencing currently common practice, no tow or roll cable carried. In a manner essential to the invention, the unit for detection of hits comprises a capacitive bridge circuit for this purpose. This is formed by the fact that each of the fencers carries an AC voltage generator for generating a low voltage and the AC voltage generated by this generator is placed on the conductive parts of his clothing and the weapon. As far as doing the main claim for battery-powered devices, this of course includes devices that are supplied from other sources (batteries, possibly, future, fuel cells or the like) self-sufficient. When foil fencing and saber fencing is a bridge branch of the bridge circuit already mentioned by the conductive, with the respective AC generator connected west of the fencer formed, which in Säbelfechten beyond the mask is electrically conductive and electrically connected to the vest. The vest (and possibly together with it the mask) of both fencers each form a plate of a plate capacitor. The size of the conductive surface of the west (and possibly masks) and the distance of the fencers to each other, the variable capacitance of this plate capacitor is determined. An essential element of the invention is that the fencers wear under their ordinary fencing trousers, which is electrically non-conductive, an additional, electrically conductive trousers. This electrically conductive pants of a fencer is also connected to the entrained by him AC voltage generator. As a result, the other bridge branch of the bridge circuit is generated, wherein the voltage of this bridge branch with respect to the other bridge branch out of phase, preferably fed in opposite phases. The bridge branch thus consists of a plate capacitor whose plates are formed by the additional, conductive pants of fencers. Although the capacitance of the plate capacitor formed by the pants of both fencers different because of different area ratios to that of the plate capacitor formed by the west, but it has been shown that this unbalance of the capacitive bridge circuit is irrelevant to the functioning of the arrangement for hit detection.

As long as no hit is achieved, as is known from a bridge circuit, the bridge branch formed by the fencing arm also connected to the respective AC voltage forms a "bridge zero." However, one of the fencers achieves this by touching the enemy fencer's vest with his weapon a hit, so the voltage applied to the vest of the struck fighter AC voltage is passed through the weapon of the hit fencing setter on an evaluation, which is associated with the AC generator of the hit exporting fencer and preferably arranged together with him in a carried by the fencer device The evaluation unit thus receives due to the AC bridging of the corresponding capacitor by the hit a non-zero input voltage, which is amplified and is used as the output voltage of the amplifier for triggering the hit signal to the signaling units transmitting transmission unit. The same applies in the case of saber fencing, where, as already emphasized, in addition to the vest and the mask of the fencer is electrically conductive and connected to the vest so that they together with this forms the corresponding capacitor plate. Another difference between foil and saber is that during saber fencing the AC voltage generated by the AC voltage generator rests on the entire weapon, while this applies to the foil only for its tip. The rest of the foil blade lies on circuit ground. The tip of the foil is formed as a contact tip in the form of an opener. That is, in a hit, the contact is opened and the tip of the foil connected to the input of the evaluation circuit. If now the opening of the contact is made by a hit on the vest of the opponent fencer, so is the AC voltage from the generator of the hit fencer to the evaluation of the apt fencer. As a result, as already described, the transmission unit for triggering the hit signal is triggered or triggered on the signaling units. The transmission unit, which has already been mentioned several times, is preferably a radio transmitter, via which the hit signal is transmitted as a radio signal to the signaling units and visualized there or acoustically signaled.

Somewhat different are the conditions when fencing. Here, the vest has always been electrically non-conductive. In the blade of the weapon are two conductive wires fed, the so-called stringing. These are connected in the event of a hit by a contact tip electrically conductive together. As a result, the transmission unit is supplied with a hit signal derived from a DC voltage, wherein the DC voltage path forms the "other signal branch." This DC voltage signal is preferably conducted via a gate circuit to the transmission unit or the transmitter transmit the corresponding signal from the transmitter to the signaling units again using a capacitive bridge circuit. This is designed so that the opposite of the plate capacitor formed by the plate capacitor bridge branch is formed by the handles of the sword, which are acted upon by the AC voltage of the respective AC voltage generator. If now the contact tip of a sword is actuated by hitting the grip of the opponent's weapon, this results in a signal voltage to be evaluated which is different from the "bridge zero" at the entrance of the evaluation unit of the fencer setting the hit That is to say, the DC signal fed to the gate, the other signal branch in the sense of the main claim, can not pass the gate and can not trigger the transmitter or the transmission unit to transmit a hit signal The DC voltage representing the hit signal is obtained from the operating voltage for the respective AC voltage generator and is preferably supplied to the gate via an optocoupler m galvanically isolate the DC signal conducted via the tip of the sword on the gate circuit of the AC voltage trigging the gate.

On the entrained by the fencers devices containing the AC voltage generator, the evaluation circuit, the transmission unit (preferably short-distance radio transmitter) and the aforementioned gate circuit and the optocoupler are equipped with a mode switch for selecting the respective fencing discipline. It will be apparent to those skilled in the art that the advantages of the inventive solution, regardless of the type of fencing used, are the use of the capacitive bridge circuit, since it exploits the already existing capacitances and does not provide galvanic or direct current connection to the bridge branches for realization of the bridge circuit is required. In contrast, it is possible for a bridge circuit realized by resistors, one of the bridge arms by the electrical connection of the leading weapon To realize with the vest of an opponent, however, another conductive connection is required for the realization of the other bridge branch, for which the fencer in turn would have to be connected with a cable or a connection via a conductive fencing track and made with this brought sliding contacts their shoes would. That is, only by the use of AC voltages and the use of the given by the clothing or weapons of the actors capacities, it is possible to use the extremely advantageous for measurement purposes of the bridge circuit and still make the fencers independent of other electrically conductive connections.

The hit reporting system according to the invention is advantageously further developed in that the evaluation circuit has a circuit unit, by means of which regardless of the form and duration of a generated by a hit input signal, an output signal of constant shape and length for driving the transmission unit or to block one of these upstream gate is generated.

According to a practice-relevant embodiment of the hit reporting system, the voltage generated by the AC voltage generators is a low voltage of 5 V or less, with a frequency of less than 10O kHz.

As already explained, the transmission of corresponding hit signals acoustically sounded or visualized by the signaling units preferably takes place by means of a short-range radio transmitter, corresponding receivers in the signaling units being tuned in frequency to the carrier frequency thereof. According to a further embodiment, the transmission signal of the transmitter is coded by means of an encoder, wherein the type of coding used in each case is adjustable for example by means of DIL switches. This makes it possible to operate in a competition several systems of the same kind next to each other, without these affecting each other. The transmitter and the associated receivers in the signaling units preferably operate at a carrier frequency in a shared, ie in an ISM band (Industrial, Scientific, and Medical Band), ie, for example, with a frequency of 463 MHz.

In a possible embodiment of the invention is at least one

Signaling unit provided on the masks of fencers. It is particularly advantageous if, for orientation for the fencers one

Signaling unit is arranged inside its mask. The signaling in the mask interior can, for example, by means arranged in the mask

LEDs are made.

The hit reporting system according to the invention is preferably designed such that means are provided against the formation of electrostatic charges (for example via the blades) on the electronic units carried by the fencers.

The invention, that is its essential part, namely the evaluation circuit and its coupling with the transmission units, will be shown again below in the form of embodiments of the individual types of fencing.

In the accompanying drawings show:

1 shows a schematic representation of the bridge circuit principle used on the example of the saber fencing FIG. 2: the schematic representation of the bridge circuit used and its design in the case of foil fencing FIG. 3: The special circuit arrangement for fencing fencing

4 and 4a: again the conditions in saber fencing FIG. 5: The resulting for the representations of Fig. 4 and 4a equivalent circuit diagram.

The figures illustrate the basic idea of the invention waiving the representation of the signaling units, in the form of signal lamps on the masks or LEDs in the masks 5, 5 ^! the fencer 1, 1 'and / or signaling units at the lounge or a central signaling unit in the form of a scoreboard. Fig. 1 illustrates in a schematic representation of the (apart from the signaling units) essential elements of the hit reporting system according to the invention using the example of saber fencing. The selected representation makes it easy to recognize the principle of the capacitive bridge circuit used. A branch of the bridge is then formed by a plate capacitor whose plates are realized by the conductive vests 4, 4 'of the fencers 1, 1' and the electrically conductive masks 5, 5 'electrically connected thereto. The conductive vests 4, 4 'and masks 5, 5' of the fencers 1, 1 'are subjected to alternating voltages of different frequencies. In the other branch of the bridge, a plate capacitor is arranged, whose plates are formed by electrically conductive pants 7, T, which are worn by the fencing athletes 1, 1 'under the actual fencing pants. The plates of this capacitor are also supplied with the respective alternating voltage of an alternating voltage generator 2, 2 'generated in a device entrained by the fencer 1, 1'. The vest 4, 4 ^! and the mask 5, 5 'of a fencer 1, 1' on the one hand and the pants 7, 7 'of the respective fencer 1, 1' on the other hand, as already shown, against each other phase-shifted applied to the AC voltage. For this purpose, the respective AC voltage generator 2 or 2 'may be equipped with a center tap or, as indicated in the figure, basically two series-connected, adding voltage sources of the same frequency and phase, with their connection point is connected to the ground potential of the circuit , The bridge branch is formed by the sabers 6, 6 'of the fencers 1, 1', which are virtually at zero potential, as it were, as described above, alternating voltages being different as a result of the alternating voltage generators 2, 2 'carried by the fencers 1, 1' This prevents a hit from being counted against one of the fencers 1, 1 ', which accidentally touches its own weapon 6, 6', in the evaluation circuit 3, 3 'assigned to the fencer 1, Y. a blocking filter is arranged, which allows only the alternating voltage of the generator 2, 2 'of the opponent fencer 1, 1' to pass, but blocks the own alternating voltage The evaluation circuits 3, 3 'are in the Bridge branch each coupled to a transmitter 8, 8 '. As soon as there is no bridge zero in the bridge branch due to a hit, in each case one of the transmitters 8, 8 'is activated to transmit a hit signal. In this case, the one transmitter 8, 8 'is controlled, the frequency filter can be passed by the AC voltage of a struck fencer. In the example this means, if the fencer V with his weapon 6 'hits the vest 4 of the opponent fencer 1, the AC voltage of the AC voltage generator 2 passes from the entrained by the fencer 1 device on the evaluation circuit 3 ^{J of} the fencer Y. Here she can pass for the corresponding frequency open frequency filter and the transmitter coupled to it 8 'to transmit a hit signal to the signaling devices, not shown, control. This emits a signal which is visualized, for example, by a signaling unit in the interior of the mask 5 'of the striking fencer 1' and on a central signaling unit. In this way, the hit achieved can be registered both by the meeting fencer 1 'himself, and the audience at the lounge or, in the case of a television broadcast, by the viewers on the television sets. As already emphasized, form according to the rules of saber fencing of the upper body and the head of the fencer 1, 1 'hit surfaces. Consequently, the fencing vest 4, 4 'and the mask 5, 5', as in the arrangements already used for decades, formed electrically conductive. The vest 4, 4 'and the mask 5, 5' of a fencer 1, 1 'are electrically connected to a common capacitor plate in the sense of the capacitive bridge circuit according to the invention.

This differs slightly from the foil fencing, for which a comparable schematic representation in FIG. 2 is given. When foil fencing the head of the opponent is not counted as a valid hit area. Accordingly, the capacitor in the corresponding bridge branch of the bridge circuit is formed only by the west 4, 4 'of the fencer 1, V, which are according to the rules designed so that the arms are also not regarded as a target area. It is also in the foil, unlike the saber, not a bat or a striking weapon, but a thrust weapon. That is, as a hit are scored with the top 9, 9 'of the weapon 6 on the target area of the opponent guided bumps. The weapon 6 therefore has a contact tip 9, 9 'known and also used for many years execution. This is an opener over which in the case of the impact of the tip 9, 9 'on a surface, a connection between the tip 9, 9' and the input of the evaluation circuit 3, 3 'is produced. If now hit with the top of the vest 4, 4 'of the opponent, then the input of the evaluation circuit 3, 3 ^! connected via the top 9, 9 'with the opposing vest 4, 4'. The AC voltage generated by the AC voltage generator 2, 2 'of the opposing or struck fencer 1, 1' thus passes, by AC voltage bridging the formed by the west 4, 4 'capacitor, over the top 9, 9' of the foil 6, 6 'of the apt Fechters 1, 1 'on the in a common housing with its own AC voltage generator 2, 2' entrained evaluation circuit 3, 3 '. The evaluation circuit 3, 3 'detects a different input voltage from the "bridge zero" and activates the associated transmitter 8, 8' to transmit a hit signal to corresponding signaling units due to a collision with an area (ie the vest) which is a target according to the regulations, the input voltage at the evaluation circuit continues to correspond to the bridge zero, so that in this case no hit signaling takes place However, unlike fencing, the fencers do not wear a conductive vest during fencing, so the conditions here are slightly different from those previously shown for sword and foil fencing This is accomplished by connecting two cores 12, 13 (covering) arranged in the blade of the sword 6 by the tip 9 impinging on a surface, and thereby directing a DC voltage to a gate 10 connected to the transmitter 8. However, if the actuation of the contact tip 9 is caused by a shell hit, that is, the meeting of the sword guard 14 'of the opponent fencer 1', but such a match, rule compliant, is not considered a hit. This is ensured by the fact that the peel shells 14, 14 'in turn with the AC voltage of the AC voltage generators 2 and 2' are acted upon. Now, if a hit on the shell 14 ', the AC voltage of the hit sword 6' is performed on the evaluation of the apt fencer 1, whose output signal in this case the gate 10 blocks. As a result, the DC voltage otherwise signaling a hit can not reach the transmitter 8 and a corresponding hit signal can not be transmitted to the signaling unit by the latter. The optocoupler n is provided for the galvanic separation of the DC voltage potential from the AC voltage of the generator 2 or 2 '. The use of a DC voltage during fencing and their galvanic separation from the generator 2 or 2 'only requires that an objective for the development of the hit reporting system according to the invention was to be able to continue to use the equipment previously used in fencing. This also applies to the special training of the sword 6 with the fabric arranged therein 12, 13. Only hereby, therefore, historically, it was necessary to detect a hit as such by means of a DC signal, but then not compliant matches on the shell 14th the sword 6, again by using the capacitive bridge circuit, to recognize and prevent their signaling by blocking the gate 10. In any case, however, an essential element of the proposed solution according to the invention is the use of a capacitive bridge circuit. Circuit technical modifications that make it necessary for historical reasons, especially in comparison between the sword fencing and the fencing fencing one hand, and the fencing fencing on the other hand, are easily manageable. For this purpose, at the of the fencers 1, 1 'entrained devices, which accommodate the respective AC voltage generator 2, 2', the evaluation circuit 3, 3 'and the transmitters 8, 8', a Operation mode selector switch is provided, by whose switching, for example, to the switch position "fencing fencing" required for fencing fencing additional elements, such as the optocoupler n and the gate circuit 10, are inserted into the corresponding signal paths 4 shows the arrangement of essential components in the manner of a block diagram, according to which each fencer 1, 1 'is equipped with a device which, as already shown, has an alternating voltage generator 2, 2', the evaluation circuit 3, 3 The evaluation circuit 3, 3 'and the transmitter 8, 8' are symbolized by a common symbol in the block diagram, and it can be seen that the alternating voltage supplied by the generator 2, 2 ' on the one hand to the electrically conductive fencing vest 4, 4 'and the associated Fenchtmaske 5, 5; is passed, and on the other hand, one of the fencer 1, 1 'carried electrically conductive pants 7, T is supplied. As already emphasized, the fencer 1, 1 'wears these trousers 7, T for fencing according to the current regulations under the actual fencing trousers. Of course, the invention also recognizes the possibility that the fencers 1, 1 ', for example, in the event of future possibly changing rules, only a conductive fencing trousers 7, T wear, so is dispensed with the coating of another, non-conductive pants. The resulting electrical conditions are illustrated schematically by FIG. 4a. Thereafter, a first bridge branch is formed by a capacitor, one plate of which is formed by the fencing vest 4, 4 'and fencing mask 5, 5' of a fencing athlete 1, 1 'and the other plate by the corresponding clothing parts of the other fencing athlete. The opposite bridge branch is realized by a plate capacitor whose plates are formed by the pants 7, T of the athletes. Without the occurrence of a hit exists in the bridge branch formed by the weapons 6, 6 ', which is also capacitive type, "bridge zero".

FIG. 5 shows an equivalent circuit diagram of the arrangement according to FIGS. 4 and 4a. In this equivalent circuit is also the occurrence of a rule compliant Hit, so a hit of the vest 4, 4 'or the mask 5, 5' of the opponent shown. The bridge circuit consists of a branch with the capacitor Cww (vest 4-vest 4 '), of course, with mental involvement of the masks 5, 5', and a condenser CHH (trousers 7-trousers T). Both capacitors are acted upon by the alternating voltages generated by the generators 2, 2 '. In the example shown, however, the fencer Y hits the vest 4 or mask 5 of the enemy fencer 1 with his saber. As a result, the AC voltage of the AC generator 2 entrained by this fencer 1 is applied to the selective input amplifier 15 '(selectively due to blocking voltage not shown). and pass filter) of the evaluation circuit 3 '(in the figure so far only indicated by the amplifier) of the fencer 1' out. The signal is amplified here and, as already shown, the transmitter 8 ', not shown here, is driven to transmit a hit signal.

List of reference numbers used

1,1 'fencer

2.2 '(AC) generator

3.3 'evaluation circuit

4,4 'vest

5.5 'mask

6,6 'weapon or saber, foil or sword

7,7 '(conductive) pants

8,8 'transmission unit or transmitter

9.9 '(weapon) tip or contact tip

10 gate switching

11 optocouplers

12,13 stringing

14 sword cup

15, 15 '(selective) input amplifier of the evaluation circuit 3, 3'

Claims

claims

1. Electronic hit reporting system for fencing, in which the rules of the respective fencing sport corresponding hits detected by electronic means and a result of a hit of these

Transmitted signal is transmitted by a transmission unit to one or more of the fencers entrusted signaling units and / or a central signaling unit for optical and / or acoustic signaling of the hit, wherein the means for

Hit detection and possibly carried by the fencers

Autonomous signaling units, characterized in that a. the means for detecting the hit comprise a capacitive bridge circuit, b. each fencer (1, 1 ') carries an AC voltage generator (2, 2') and an associated evaluation circuit (3, 3 ') in the form of one or more battery-powered devices, c. the AC voltages generated by the AC voltage generators (2, 2) 'of both fencers (1, 1') of different frequency and the evaluation circuits (3, 3 ') a

Operating mode selector switch for selecting the type of fencing carried out in each case, and a blocking filter for blocking the frequency of a voltage generated by the associated AC voltage generator (2, 2 '), ie by the same fencer (1, 1'), and a pass filter for the frequency of one from the other AC voltage generator (2, 2 ') generated voltage, d. the capacitors of the bridge circuit are formed by parts of the clothing and the weapons (6, 6 ') of the fencers (1, 1') provided with one of the alternating voltage generators (2, 2 ')

AC voltage are applied, e. irrespective of the type of fencing, a branch of said bridge circuit is supported by one of the fencers (1, 1 ') under the fencing trousers, subjected to the AC voltage, electrically conductive pants (7, 7') and between the conductive pants (7, 7 ') the fencer (1, 1') existing capacity is formed, f. the alternating voltage in which the pants (7, T) of the fencer (1, 1 ¹ ) formed bridge branch is out of phase with respect to the other bridge branch, wherein, depending on the set with the mode selector switch fencing, either in the case of one with the weapon ( 6, 6 ') of a

Fencing (1, 1 ') against a scored as a surface area, namely the vest (4, 4') or optionally the mask (5, 5) of the other fencer (1, 1 '), led hit at the entrance of the meeting fencer (1, 1 ') entrained evaluation circuit (3, 3') is present from this evaluable AC voltage and a from this

AC voltage-derived output signal of the evaluation circuit (3, 3 ') the associated transmission unit (8, 8') for transmitting a hit signal to the signaling drives or a corresponding output signal when touching a not rated as a hit area surface by the evaluation circuit (3, 3 ' ) and by means of which the transmission of one of the transmission unit (8, 8 ') on another signal path supplied hit signal is blocked.

Dossier detection system according to claim 1, characterized in that the transfer unit (8, 8 ') supplied in the mode Fencing fencing hit signal is derived from a DC signal, which in connecting the covering of the sword (6, 6') forming, integrated in the blade Wires through a contact tip (9, 9 ') of the sword (6, 6') is generated due to a hit, the

Degenschalen (14, 14 ') are acted upon by the AC voltage generators (2, 2') generated AC voltage, so that, in the Fallθ a Schalentreffers, from the then on the evaluation circuit (3, 3 ') pending AC voltage from the AC voltage generator (2,

2 ') of the fencer (1, 1') hit by its sword guard (14, 14 '), an output signal is derived from the evaluation circuit (3, 3') which transmits the transmission of the direct current signal derived from the DC voltage by the transmission unit (8, 8 ') locks.

3. hit reporting system according to claim 2, characterized in that the derived from the DC voltage hit signal of the transmission unit (8, 8 ') via a gate circuit (10) is supplied, which in the case of a Schalentreffers by the output of the evaluation circuit (3, 3 ') is locked.

4. hit reporting system according to claim 2 or 3, characterized in that the DC voltage path, via which the hit signal of

Transmission unit (8, 8) is supplied, from which its transmission optionally blocking AC voltage signal is galvanically decoupled.

5. hit reporting system according to claim 4, characterized in that the decoupling of DC and AC voltage path by means of an optocoupler (11) is realized.

6. hit reporting system according to claim 1 or 2, characterized in that the evaluation circuit (3, 3) comprises a circuit unit, by means of which, regardless of the form and duration of an induced by a hit input signal, an output signal of constant form and

Length is generated.

7. hit reporting system according to any one of claims 1, 2 or 6, characterized in that the phase shift of the voltages in the Branches of the capacitive bridge circuit is 180 °, that is, the branches are in phase opposition to each other.

8. hit reporting system according to claim 1 or 7, characterized in that it is the voltage generated by the AC voltage generators (2, 2 ') to a low voltage of <5 V with a frequency of <100 kHz.

9. hit reporting system according to any one of claims 1, 2 or 6, characterized in that it is in the transmission unit (8, 8 ') to a

Short-range radio transmitter is, by which the hit signals are transmitted wirelessly to a frequency-tuned receiver in the signaling units.

10. hit reporting system according to claim 9, characterized in that the transmission signal of the transmitter (8, 8 ') is encoded by means of an encoder.

11. hit reporting system according to claim 10, characterized in that the type of coding is adjustable.

12. hit reporting system according to any one of claims 9 to 11, characterized in that the transmitter (8, 8 ') and the associated receiver in the signaling units with a carrier frequency in an ISM band work.

13. hit reporting system according to one of claims 1, 2 or 9, characterized in that in each case at least one signaling unit to the masks (5, 5 ') of the fencer (1, 1') is provided.

14. hit reporting system according to claim 13, characterized in that for orientation of the fencers a signaling unit in the interior of its mask (5, 5 ') is provided.

15. hit reporting system according to claim 14, characterized in that the hit signaling by means in the mask (5, 5 ') arranged LEDs.

16 hit system according to one of claims 1 to 15, characterized in that on the by the fencers (1, 1 ') carried electronic units are provided against the formation of electrostatic charges.