Abstract: The present invention concerns a hit detection equipment, usable by a fighter and an opponent for martial arts such as taekwondo, karate or boxing, comprising a central device, a valid surface, for example a jersey and/or a helmet, and at least one authorized surface, for example a glove and/or a shoe. Said valid surface comprises at least one conductive surface and said authorized surface comprises two conductive structures insulated from each other, intertwined with each other over the entire said authorized surface, and each connected to an electrical terminal, and configured so that a contact of said authorized surface on a conductive surface creates a short circuit between the two conductive structures. The present invention also concerns a method for detecting a hit struck by a fighter on an opponent, for martial arts such as taekwondo, karate or boxing, each equipped with an equipment according to the invention.

Abstract: The present invention concerns a hit detection equipment, usable by a fighter and an opponent for martial arts such as taekwondo, karate or boxing, comprising a central device, a valid surface, for example a jersey and/or a helmet, and at least one authorized surface, for example a glove and/or a shoe. Said valid surface comprises at least one conductive surface and said authorized surface comprises two conductive structures insulated from each other, intertwined with each other over the entire said authorized surface, and each connected to an electrical terminal, and configured so that a contact of said authorized surface on a conductive surface creates a short circuit between the two conductive structures. The present invention also concerns a method for detecting a hit struck by a fighter on an opponent, for martial arts such as taekwondo, karate or boxing, each equipped with an equipment according to the invention.

Abstract: A system of hit detection and signaling for fencing, in particular for the epee, includes, for each adversary, an outfit completely conductive surface wise, a fencing conductive mask endowed with a luminous hit signaling device and a weapon, in particular an epee, a guard made of an isolating material or covered with an isolating material and whose tip at least is conductive, the outfit and the mask, and the tip of the weapon for each adversary being connected, separately, to a hit detection unit, appearing as a central detection and signaling unit to which they are wired or as a portable unit carried by each adversary also connected to the luminous signaling device and to the conductive soles of shoes worn by the appropriate adversary.

Abstract: The current invention concerns a system of hit detection and signaling for fencing, in particular for the epee, characterized by consisting mainly, for each adversary (5,5′), on one hand, of an outfit (1, 1′, 1″, 1′″) completely conductive surface wise, on the other hand, of a fencing conductive mask (2), eventually endowed with a luminous hit signaling device (3, 3′) and finally of a weapon (4), in particular an epee, comprising a guard (4′) made of an isolating material or covered with an isolating material and whose tip (4″) at least is conductive, the outfit (1,1′,1″,1′″) and the mask (2) on one hand, and the tip of the weapon (4″) at least on the other, for each adversary (5,5′) being connected, separately, to a hit detection unit (6 or 7), appearing as a central detection and signaling unit (6) to which they are wired (8) or as a portable unit (7) carried by each adversary (5,5′) also connected to the luminous sign

Abstract: A system for the detection and signalling of his in fencing is characterized in that its main components are portable hit detection units (1) each carried by a fencer and electrically connected to the corresponding weapon (2), at least one central (3) hit discrimination and signalling unit electrically connected to the conductive strip (4) and shoes with conductive soles (5) carried by each fencer and allowing an electrical connection between the conductive strip (4) and the hit detection units (1) and eventually the conductive valid hit surfaces worn by each fencer (6) (foil and saber).

Abstract: An offset correction circuit is disclosed in a digital-to-analog coder (10) comprising a delta coder (18) providing a serial bit string at a high frequency F in response to digital words supplied at a low frequency F, and an analog integrator (22) providing an analog output signal (24) which is an analog representation of the digital words. The offset correction circuit avoids introducing an offset in the analog output of the integrator (22) when a PLO correction is taken to slow down or to speed up the clock controlling the input of the digital words. Such a circuit is implemented by a state generator which provides a corrected pulse in place of the sigma-delta data which lasts half the duration of the offset.