A kind of fast magnetic field measurement method and device based on Raman spectrum

Abstract

The invention discloses a rapid magnetic field measurement method and device based on the Raman spectrum. The method comprises steps of S1, carrying out Raman spectrum measurement: preparing a cold radical, allowing the cold radical to be upwards thrown or freely fall off, and when the cold radical enters a to-be-measured vacuum cavity, using the mutual actions of Raman pi pulses and atoms and measuring Raman spectrums in the to-be-detected vacuum cavity in different action positions so as to obtain Raman spectrum data corresponding to the action positions; S2, Raman spectrum fitting: fittingthe Raman spectrum data by use of a composite Rabbi function so as to obtain resonant frequencies of the Raman spectrums corresponding to the action positions; and S3, magnetic field intensity calculation: using the obtained resonant frequencies of the Raman spectrums, calculating magnetic field intensity in each target position. The device comprises a Raman spectrum measurement module, a Raman spectrum fitting module and a magnetic field intensity calculation module. According to the invention, rapid magnetic field measurement based on the Raman spectrum can be achieved and the method and thedevice are advantaged by simple achieving method and high measurement precision.

Description

technical field [0001] The invention relates to the technical field of magnetic field measurement, in particular to a Raman spectrum-based fast magnetic field measurement method and device. Background technique [0002] Magnetic field measurement technology has a wide range of applications in various fields such as biomedicine, military technology and industry. For magnetic field measurement, there are many measurement methods, including electromagnetic induction method, fluxgate method, Hall effect method, superconducting effect method and magnetic resonance method, etc. There is a nonlinear relationship between the magnetic induction intensity of the magnetic core in the measured magnetic field and the magnetic field strength of the measured magnetic field. The fluxgate method uses this characteristic for measurement; the Hall effect method uses the Hall effect to measure the magnetic field. When the external magnetic field is perpendicular to the current flowing through ...

AI Technical Summary

Problems solved by technology

The measurement process of the above-mentioned measurement method is complicated, and it has high requirements on the measurement environment. It cannot meet the measurement requirements of various measurement environments such as field measurement at the same time. Moreover, it is based on manual measurement, which has low measurement efficiency and is prone to measurement errors.

[0003] Using Raman spectrum can measure the magnetic field strength at any position. The measurement process is simple, the measurement range is large and the measurement accuracy is high. Measure parameters such as action time to obtain Raman spectrum, the measurement process is inconvenient, the measurement efficiency is low, and it takes a very long measurement time, and within a long measurement time, the measurement results are very susceptible to measurement errors caused by magnetic field drift

In addition, when processing Raman spectrum data, the resonance frequency is currently determined mainly by single-peak fitting or maximum value extraction, which will increase the complexity of the data processing process, prolong the data processing time, and increase the magnetic field measurement error.

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