Optimized cesium-light-pump weak magnetic detection device

A magnetic detection device, optical pump technology, applied in the direction of measuring device, magnetic resonance measurement, sound wave re-radiation, etc., can solve the problem that it is difficult to obtain high-performance cesium optical pump magnetometer products, to improve accuracy and stability, Integration and high reliability

Inactive Publication Date: 2014-06-11
WUHAN UNIV OF TECH
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Problems solved by technology

It is difficult to obtain high-performance cesium optical pump magnetometer products in the field of national defense in my country

Method used

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  • Optimized cesium-light-pump weak magnetic detection device
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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the content of the present invention is not limited.

[0046] The physical theory basis of the optical pump magnetometer is optical magnetic resonance, which uses the principle of optical pumping and magnetic resonance to realize the measurement of weak magnetic field. Due to the extremely small energy difference of the Zeeman sublevels of gas atoms, the magnetic resonance signal is extremely weak and difficult to detect. In order to obtain the magnetic resonance signal, a photodetector is used to detect the absorption of incident light by the atom to indirectly detect the optical magnetic resonance signal. Optical magnetic resonance technology improves the sensitivity of detecting magnetic field by several orders of magnitude while maintaining the high-resolution characteristics of magnetic resonance.

[0047] Based on the basic principles of optical...

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Abstract

The invention relates to an optimized cesium-light-pump weak magnetic detection device. In the optimized cesium-light-pump weak magnetic detection device, a non-magnetic-effect thermostatic controller enables a cesium spectrum lamp and a cesium sample absorbing bulb to be in the constant-temperature steam state, a radio frequency source stimulates the cesium spectrum lamp to emit light, and the light is converted into left handed circular polarization light to illuminate the cesium sample absorbing bulb, and focused on a photoelectric detector through a convex lens; a magnetoresistive sensor magnetic measuring module assists in measuring the value of a geomagnetic field of the position where the device is located, the range of strength is judged through an embedded type processing terminal module, and a self-oscillation module is controlled in a segmentation mode; photomagnetic resonance signals of the cesium sample absorbing bulb are detected by a low-noise photoelectric conversion circuit and simulate a high-frequency coil on the cesium sample absorbing bulb after being amplified and dephased so as to constitute a self-oscillation circuit, and Larmor signals are output; a Larmor signal measuring module and a big-dipper / GPS locating module are used for accurately measuring the value of the geomagnetic field of the position where the device is located. According to the optimized cesium-light-pump weak magnetic detection device, by means of the method achieving auxiliary magnetic field measurement, subband control, accurate frequency measurement and dual-mode locating, detection accuracy and reliability of the device are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of magnetic field measurement, and in particular relates to an optimized cesium optical pump magnetic field detection device. Background technique [0002] In the field of magnetic field measurement, the current magnetometers mainly include the following types: mechanical magnetometer, fluxgate magnetometer, proton precession magnetometer, optical pump magnetometer, superconducting quantum magnetometer, etc. The mechanical magnetometer consists of a magnet mounted on a pivot, used to measure the vertical or horizontal magnetic field, which is less used now: the fluxgate magnetometer is a soft magnetic material with high magnetic permeability (such as permalloy) As a magnetic core, the magnetic measuring device developed by its magnetic saturation characteristics under the action of AC and DC magnetic fields and Faraday's electromagnetic induction principle has an effective sensitivity of several nT, and is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/26G01V3/40
Inventor 陈永泰彭俊杰冯芒陈亮唐静程龙臧滨黄杨孙长景
Owner WUHAN UNIV OF TECH
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