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Multi-peak closed-loop CPT magnetometer system without directional blind area

A non-directional, magnetometer technology, applied to the size/direction of the magnetic field, the use of magneto-optical equipment for magnetic field measurement, etc., can solve problems such as blind areas of directions, eliminate the impact of measurement accuracy, improve signal-to-noise ratio, and avoid mutual interference effect

Active Publication Date: 2020-04-21
BEIJING INST OF AEROSPACE CONTROL DEVICES
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AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and propose a multi-peak closed-loop non-direction blind area CPT magnetometer system, which solves the problem that there is a direction blind area when two EIT signals are used for measurement, and the measurement mode needs to be switched

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  • Multi-peak closed-loop CPT magnetometer system without directional blind area
  • Multi-peak closed-loop CPT magnetometer system without directional blind area
  • Multi-peak closed-loop CPT magnetometer system without directional blind area

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Embodiment Construction

[0028] The present invention proposes a multi-peak closed-loop non-direction blind area CPT magnetometer system, which realizes magnetic field measurement by locking four EIT signal peaks at the same time. There is no measurement blind area and mode switching, and has extremely high engineering application value. No matter how the magnetic field direction changes, It can be guaranteed that at least two EIT signals can provide magnetic field measurement, that is, a CPT magnetometer with no direction blind zone can be realized.

[0029] A detailed description will be given below in conjunction with the accompanying drawings.

[0030] Such as image 3 As shown, the present invention proposes a multi-peak closed-loop non-directional blind zone CPT magnetometer system, including:

[0031] Sinusoidal frequency modulation module: generate a single-frequency microwave signal through a microwave source, perform single-sideband sinusoidal frequency modulation on the microwave signal, a...

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Abstract

The invention discloses a multi-peak closed-loop CPT magnetometer system without a directional blind area. The system adopts a time-sharing modulation method to modulate microwave signal frequency, the microwave signal frequency is locked on four groups of EIT signals at the same time, the four groups of EIT signals comprise + / -3-level (or + / -1-level) and + / -2-level EIT peaks, and high-precision measurement of a magnetic field is realized by measuring the frequency difference of the + / -2-level EIT peaks or the + / -3-level EIT peaks. The system locks four groups of EIT signals at the same time;when the magnetic field direction is changed; if the + / -3-level and + / -1-level (or + / -2-level) EIT peaks disappear, the magnetic field measurement can be realized by measuring the frequency differenceof the + / -2-level (or + / -3-level and + / -1-level) EIT peaks; therefore, the CPT magnetometer without the direction blind area can be realized, the measurement mode does not need to be switched when the direction of the magnetic field is changed, continuous measurement of the magnetic field can be ensured, and the engineering application value is extremely high.

Description

technical field [0001] The invention relates to a CPT magnetometer system for realizing non-directional blind zone measurement, which belongs to the field of microwave frequency locking. Background technique [0002] The CPT magnetometer has the characteristics of small size, low power consumption, high precision, and no direction blind zone. It is expected to replace the optical pump magnetometer and be used in the fields of space magnetic measurement, marine magnetic measurement, and aerial magnetic measurement. [0003] The CPT magnetometer is based on the Zeeman splitting phenomenon of the atomic fine structure energy level in the magnetic field, and realizes the measurement of the magnetic field by detecting the transmission spectral characteristics caused by the interference between the two transition channels of the atom. In the ∧-type three-level system, the energy level |1>, |2> is the ground state energy level, and |3> is the excited state energy level. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 邓意成王学锋张笑楠卢向东桑建芝李明阳徐强锋李建军
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES