Method for enhancing measurement precision of proton magnetometer and circuit thereof

Abstract

The invention provides a method and a circuit for improving the measurement precision of a proton magnetometer; the method adopts 1) a high-speed device cycle-measuring method which uses the period of the signal to be measured as the counting gate time of the standard pulse so as to calculate the period of the signal to be measured; 2) an evaluation and processing method for grade of real-time signal data, which automatically calculates the discreteness according to the difference of the magnetic field to be measured and the interference on the time domain characteristic and the attenuation characteristic of the spinning signal; and 3) a correction method for the temperature coefficient of devices, which adopts high-sensitiveness temperature integration sensor and an A / D (analog to digital) converter to directly carry out the correction in the measurement program. The circuit comprises an omni-directivity deep-sea proton magnetic probe, a probe polarization converter, a polarization controller, a tuning matcher, a frequency selective amplifier, a signal shaper, a signal counter, a counting gate, a standard pulse generator and a binary counter.

Description

technical field [0001] The invention relates to the technical field of proton magnetometer measurement, in particular to a method for improving the measurement accuracy of a proton magnetometer and a circuit thereof. Background technique [0002] The proton magnetometer is a magnetometer with high observation accuracy. Because of its clear and simple observation mechanism, it has become a relatively cheap magnetometer and has been widely used in many fields. In the past, the proton magnetometer showed insufficient observation accuracy (generally ±1nT) and poor stability in some observation fields. Therefore, most of these high-precision magnetic observations are expensive (nearly ten times more expensive than the proton magnetometer) ) imported optical pump magnetometer and OVERHAUSER magnetometer. According to the high stability of the hydrogen proton gyromagnetic ratio, as long as the resolution and stability of the hydrogen proton precession frequency signal counting are...

AI Technical Summary

Problems solved by technology

In the past, the proton magnetometer showed insufficient observation accuracy (generally ±1nT) and poor stability in some observation fields. Therefore, most of these high-precision magnetic observations are expensive (nearly ten times more expensive than the proton magnetometer) ) imported optical pump magnetometer and OVERHAUSER magnetometer

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