Li-Fi-based all-optical transmission magnetic field detection system

A detection system and optical transmission technology, which is applied in the field of all-optical transmission magnetic field detection system, can solve the problems of large volume, difficult magnetic field detection, and limited sensor detection accuracy

Active Publication Date: 2018-01-19
蚌埠高灵传感系统工程有限公司
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Problems solved by technology

[0002] The current magnetic field sensors are mainly based on mechanisms such as Hall effect, magnetoresistance effect, fluxgate effect, tunnel effect and nuclear magnetic resonance effect. Interference, which limits the further improvement of sensor detection accuracy
Traditional magnetic field sensors are bulky and difficult to detect magnetic fields in narrow spaces

Method used

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  • Li-Fi-based all-optical transmission magnetic field detection system

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Embodiment Construction

[0028] figure 1 It is a schematic structural diagram of a Li-Fi-based all-optical transmission magnetic field detection system according to an embodiment of the present invention. Such as figure 1 As shown, the present invention provides a Li-Fi-based all-optical transmission magnetic field detection system, including an optical fiber directional coupler 2 , an LD light source 1 , a magnetic field sensor, a matching liquid 5 and a Li-Fi module 11 . The fiber directional coupler 2 is configured as a 2*2 fiber directional coupler and has a first port 21 to a fourth port 24 . The LD light source 1 is used to emit modulated laser light with a preset frequency to the magnetic field detection system, and its output terminal is connected to the first port 21 . The magnetic field sensor is connected to the second port 22 through the Y-shaped optical fiber body for detecting the strength of the magnetic field. The matching liquid 5 is connected to the fourth port 24 to prevent Fresn...

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Abstract

The present invention provides a Li-Fi-based all-optical transmission magnetic field detection system and relates to the technical field of optical fiber sensors. The system of the invention includesan optical fiber directional coupler, an LD light source, a magnetic field sensor, a matching liquid and a Li-Fi module. The optical fiber directional coupler is configured as a 2*2 optical fiber directional coupler and is provided with a first port, a second port, a third port and a fourth port. The LD light source is used to emit the modulated laser of a preset frequency to the magnetic field detection system. The output end of the LD light source is connected with the first port. The magnetic field sensor is connected with the second port through a y-type optical fiber body and is used fordetecting the strength of the magnetic field. The Li-Fi module comprises a Li-Fi transmitting unit and a Li-Fi receiving unit. The Li-Fi transmitting unit is connected with the third port through a matched grating. The Li-Fi receiving unit is connected with a photoelectric detector. In this way, a wireless transmission network between the magnetic field sensor and the photoelectric detector is established. According to the invention, in the full-light excitation mode, a to-be-tested magnetic field is not influenced at all. The system is small in size, and is suitable for being used in a narrowspace.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a Li-Fi-based all-optical transmission magnetic field detection system. Background technique [0002] The current magnetic field sensors are mainly based on mechanisms such as Hall effect, magnetoresistance effect, fluxgate effect, tunnel effect and nuclear magnetic resonance effect. Interference is generated, thereby limiting the further improvement of the sensor detection accuracy. Traditional magnetic field sensors are bulky and difficult to detect magnetic fields in narrow spaces. The optical fiber magnetic field sensor does not affect the electromagnetic field to be measured, and has the advantages of corrosion resistance, light weight, small size, etc., which is beneficial to the application in aviation and aerospace fields and narrow spaces. The optical fiber cantilever beam magnetic field sensor combines the characteristics of the optical fiber magnetic fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
Inventor 于盟盟
Owner 蚌埠高灵传感系统工程有限公司
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