Hand contact sensor for grenade detonator - uses oscillator with coil wound within detonator cap whose inductance is varied by proximity of hand
The firing mechanism includes an electronic circuit controlling the sequence of ignition after removal of the pin. A detector is incorporated to sense when the grenade leaves the users hand in order to start the sequence of operation. The detector comprises an oscillator whose frequency is between s...
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Format: | Patent |
Sprache: | eng ; fre |
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Zusammenfassung: | The firing mechanism includes an electronic circuit controlling the sequence of ignition after removal of the pin. A detector is incorporated to sense when the grenade leaves the users hand in order to start the sequence of operation. The detector comprises an oscillator whose frequency is between several hundreds of megahertz and a few gigahertz. The coil (L) of the oscillator includes a few turns of wire lying close to the users hand when the grenade is being held. A capacitor (C) is connected in parallel with the coil, and has a value of about 7pF in order to provide resonance at a frequency of 500MHz. Resonance of this circuit is not however achieved while the users hand influences the effective inductance of the coil.
BOUCHON ALLUMEUR DE GRENADE AVEC DETECTEUR ELECTRONIQUE DE LACHER DE MAIN.IL COMPREND DES MOYENS 20, 21, 22, 23 DE COMMANDE D'AMORCE DE DETONATEUR 12 DE LA CHAINE PYROTECHNIQUE ET DES MOYENS 24, 25, 26, 27 DE COMMANDE D'INFLAMMATEUR D'ARMEMENT 14 DE LA CHAINE PYROTECHNIQUE RELIES A UN DETECTEUR DE LACHER DE MAIN 18 ET A UN DETECTEUR DE CHOC 16 POUR CONDITIONNER, APRES LE DEGOUPILLAGE DE LA GRENADE, RESPECTIVEMENT LA COMMANDE DE L'AMORCE DE DETONATEUR 12 ET LA COMMANDE DE L'INFLAMMATEUR D'ARMEMENT 14 EN FONCTION D'UN MODE DE FONCTIONNEMENT FUSANT OU FUSANT-PERCUTANT SELECTIONNE ET DES INDICATIONS DONNEES PAR LES DEUX DETECTEURS 16 ET 18. LE DETECTEUR DE LACHER DE MAIN 18 EST DE PREFERENCE UN OSCILLATEUR COMPRENANT UNE BOBINE SITUEE A PROXIMITE DE LA MAIN DE L'UTILISATEUR. |
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