Apparatus and method for electrical measurements on conductors

Details Apparatus and method for electrical measurements on conductors Apparatus and method for electrical measurements on conductors

G - Physics

01

R

G01R 31/02 (2006.01) G01R 15/14 (2006.01) G01R 19/25 (2006.01)

Patent

CA 2366531

A method for measuring at least one characteristic parameter of an alternating current in a conductor, the method comprising the steps of measuring the magnetic field around the conductor at a point along the conductor; deriving an analogue voltage signal representative of the measured magnetic field; amplifying the analogue voltage signal; converting the amplified voltage signal into a digital voltage signal; measuring the digital voltage signal and, when the amplitude of digital voltage signal reaches a predetermined value, adjusting a gain setting of the amplification; and generating an output signal representative of the parameter of the alternating current based on the amplified voltage signal and the gain setting.

L'invention concerne un procédé de mesure d'au moins un paramètre caractéristique d'un courant alternatif dans un conducteur, qui consiste à mesurer le champ magnétique autour du conducteur à un point situé le long du conducteur, à dériver un signal de tension analogique représentatif du champ magnétique mesuré, à amplifier le signal de tension analogique, à convertir le signal de tension amplifié en un signal de tension numérique, à mesurer le signal de tension numérique et, lorsque l'amplitude du signal numérique atteint une valeur prédéterminée, à ajuster un réglage de gain de l'amplification, et à générer un signal de sortie représentatif du paramètre du courant alternatif sur la base du signal de tension amplifié et du réglage de gain.

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