MAGNETOMETER HAVING FLUXGATE-TYPE MAGNETIC SENSOR AND SIGNAL PROCESSING METHOD FOR MEASUREMENT OF ULTRA LOW MAGNETIC FIELD

摘要

When the present invention is to flow an AC current without utilizing all of the primary and the secondary of the conventional fluxgate sensor, a primary coil only after the having sensors two side by side, each other so that in the opposite direction the core may be fully saturated , two methods to detect the current flowing through the coil wound around the sensor which takes in an output signal source, and also creates a two-fold frequency of the resonant frequency (resonant frequency) synchronization in the LC resonance using the signal processing of the conventional fluxgate sensor without detection, an optionally by providing a method for detecting the magnetic flux density (magnetic flux density, B) is zero, sampling (sampling) the signal at the time when the in the hysteresis curve (magnetic hysteresis curve) of the sensor was driven at an arbitrary frequency in the driving frequency excellent linearity, you can measure the pole authors captain of the degree 1pT to get the output of the high gain Magnetic flux gates by the magneto-meter equipped with a sensor and processing a signal generated from the sensor provides a signal processing method for measuring the pole By millet, as well as the direct current at the measurement frequency of 0-50kHz has a resolution of 1fT~1pT 1mT~1pT the magnetic field can be measured.