Patent ID: 6084406
Filing Date: 2000-07-04
Classification: G01C,G01R

Abstract:
An instrument for measuring a magnetic field, comprising:a sensor element having a high-permeability core with a long axis and a winding around the core, the sensor element disposed in the magnetic field to be measured;a remotely-operable switch having a first side connected to the sensor element and a trigger input for closing the switch;a voltage source connected to a second side of the remotely operable switch;a sensing circuit for measuring one of voltage or current and connected to the sensor element, the sensing circuit having a switch-control output connected to open the remotely-operable switch;a pulse output line connected to the first said of the remotely-operable switch; anda pulse-width measuring circuit connected to the pulse output line;wherein the trigger input closes the switch, the sensing circuit initiates the switch control output at a predetermined magnitude of voltage or current thereby causing the remotely-operable switch to open, and wherein the pulse width measuring circuit measures the pulse width resulting on the pulse output line as an indication of vector value of the magnetic field.