A method for monitoring the diurnal variation of geomagnetism
A technology of geomagnetism and geomagnetic field, applied in geophysical measurement, measuring devices, electric/magnetic exploration, etc., can solve the problem of low sampling rate of geomagnetic monitoring methods, achieve high sampling rate, fast measurement speed, and simple operation
Active Publication Date: 2021-03-30
HANGZHOU DIANZI UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to overcome the problem that the sampling rate of the current geomagnetic monitoring method is not high, the present invention provides a new type of geomagnetic diurnal variation monitoring method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0035] Further analysis is made in conjunction with the accompanying drawings.
[0036] Under the magnetic field, the alkali metal atomic energy level will split, form a magnetic grade, and the splitting is associated with the geomagnetic field size. When a bunch of circularly polarized lasers passes through an alkali metal atomic gas, when the alkali metal atom gas is in the same frequency and the same frequency range is in the same frequency of adjacent two magnetic grade, the alkali metal atom's absorption rate is the largest. The relationship between measuring transmission light and laser frequency can be obtained to be tested. The influence of nuclear progress, the alkali metal atom's absorption rate of the laser will reach the extreme value at two different radio frequency field frequencies, and the difference in the frequency of the two radio frequency field will result in nuclear progress. The ground magnetic field size can be accurately obtained based on nuclear progress ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a novel geomagnetic diurnal variation monitoring method. According to the method, a geomagnetic field probe is placed in a geomagnetic field under constant temperature; a lasercontrol circuit is regulated, laser wavelength is kept stable, and resonance between the laser wavelength and alkali metal atoms at the ground state level is maintained; a polarizer and a quarter-wave plate are perpendicular to the direction of a laser beam; the angle between the optical axis of the quarter-wave plate and the laser polarization direction is regulated, and the laser polarization is changed into left-handed circular polarization or right-handed circular polarization; a radio frequency coil generates a radio frequency field parallel to the laser beam in direction; and a photoelectric conversion device detects left-handed circular polarized lasers or right-handed circular polarized lasers, detected light intensity values are subject to collection and signal processing throughdata collection and processing equipment, a frequency difference between optical pump magnetic resonance signals at different levels is utilized to obtain nuclear precession information, and then thesize of the geomagnetic field is calculated according to the nuclear precession information. The method has the advantages that operation is easy, and a high sampling rate is obtained while geomagnetic data precision is guaranteed.
Description
Technical field [0001] The present invention belongs to the field of geomagnetic monitoring, involving a new type of geomagnetic cycle monitoring method for increasing the sampling rate of geomagnetic data in the case where the geomagnetic data accuracy is guaranteed. Background technique [0002] Geomagnetic monitoring is mainly used to monitor changes in magnetic fields in the world, which is of great significance to people's production and life. At present, the geomagnetic monitoring method mainly uses direct excitation atomic cores, measuring the method of moving the atomic nuclear magnetic field. Due to the relatively stable atomic core, it is more difficult to excite, resulting in a long measurement time, and the sampling rate is not high. Inventive content [0003] In order to overcome the problem with the current sampling rate of the current geomagnetic monitoring method, the present invention provides a new type of geomagnetic glue monitoring method. This method uses th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/40
CPCG01V3/40
Inventor 梁尚清李国祝杨国卿
Owner HANGZHOU DIANZI UNIV