Convertir volts en force

J'ai un marteau d'impact de PCB (ref 086D20) branché à la carte d'acquisition NI 9234. Mon but est de tracer la courbe de la force donnée par un choc de marteau. Le problème est que je ne sais pas comment faire pour convertir les valeurs de tension (en V) en valeur de force (en N). La multiplication de la sensibilité du marteau (0.23mV/N) par les mesures de la tension semble pas correct, car cette méthode donne plusieurs valeurs et pics positifs et négatifs, tandis que la courbe théorique ne présente qu'un pic positf (une impulsion correspondant avec un choc) et aucune valeur négative.
Alors, connaissez-vous une méthode théorique pour convertir ces mesures de tension en force ?
Merci

Vous faites une confusion :
Votre calcul qui donne 5V est correct concernant la gamme du signal de sortie, pas concernant la tension d'excitation, qui est "hardware" dependante, et qui n'a pas de rapport avec la sensibilité.
Votre capteur en fonctionnement correct sortira certe 5 volts pleine echelle. Mais pour fonctionner correctement, il doit tirer son energie d'une source d'excitation, qui elle, selon moi, doit être de 20 à 30v, à courant constant. (cette notion de courant constant est importante pour ce type de capteur).
Pour vos config : en mode force, vous êtes en mode IEPE, ce qui est requis pour utiliser les catpeurs ICP de chez PCB en direct (ce mode gére justement l'alim à courant constant entre autre)
Sans le mode IEPE, il faut un conditionnement externe pour capteur ICP, genre ça, dans votre chaine de mesure.
D'autre part, même si en mode IEPE, vous avez une réponse qui à la bonne forme, j'ai des reserses sur la qualité de la mesure mesure : le capteur travail selon moi en mode dégradé puisqu'il n'est alimenté qu'en 5V par la carte NI. Mais si PCB dit que c'est OK, why not.
Pour avoir la lecture en volts, il faut que vous arriviez à activer le mode IEPE d'une maniére ou d'une autre. Ca peut ***** faire programatiquement sous labview, mais sous signal express, je ne suis pas sur que ça soit possible en "mesure de tension".
J'éspére que je suis clair, bon courage
antoine

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