System for fiber DC magneto-optic detection and method thereof
Assignee3S Hi-Technologies Co., Ltd.
InventorHaijun Yuan
Life of this patent
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Abstract
A system for fiber DC magneto-optic detection and method thereof are provided. The system comprises a power supply and signal processing module (400), an optical fiber device (200), a magneto-optic probe (100) and a reference device (300). The reference device (300) is mounted in the system, and the measured signal can be corrected via a reference magnetic field pulse signal generated by the reference device (300) so as to eliminate the influence that the environmental factors caused on the measurement, and to obtain accurate measurement data, thus improving measurement accuracy of the system.
Claims13
A system for fiber DC magnetic-optic detection, characterized in that, the system comprises a power supply and signal processing module, a fiber device, a reference device and a magneto-optic probe, wherein
- the power supply and signal processing module is used for transmitting laser light to the magneto-optic probe through the fiber device and for receiving by two paths the optical signal coming from the magneto-optic probe and carried on the laser light and converting respectively the two paths of optical signal into two paths of electric signal, performing process on the two paths of electric signal based on a reference magnetic field pulse signal transmitted by the reference device, so as to obtain the magnetic field information and/or current information at a measurement point itself;
- the fiber device is used for dividing the laser light coming from the power supply and signal processing module into two paths, transmitting respectively the two paths of laser light to the two ends of the magneto-optic probe and transmitting the optical signal coming from the magneto-optic probe to the power supply and signal processing module by two paths;
- the reference device is used for generating a reference magnetic field pulse signal with known amplitude and shape at the measurement point;
- and
- the magneto-optic probe is used for detecting the magnetic field signal of the measurement point and converting the magnetic field signal into optical signal, in which the magnetic field signal is superposition of the reference magnetic field pulse signal and the magnetic field signal generated at the measurement point itself, and wherein the magneto-optic probe is further used for receiving the two paths of laser light and transmitting the optical signal after conversion by carrying the optical signal on the two paths of laser light respectively.
A method for fiber DC magneto-optic detection, characterized in that the method comprises:
- a power supply and signal processing module emitting laser light;
- a fiber device dividing the laser light into two paths and transmitting the two paths of laser light to the two ends of a magneto-optic probe respectively;
- the magneto-optic probe receiving the two paths of laser light, detecting the magnetic field signal of the measurement point, converting the magnetic field signal into an optical signal, and transmitting the optical signal after conversion by carrying the optical signal on the two paths of laser light respectively, wherein the magnetic field signal is superposition of the reference magnetic field pulse signal and the magnetic field signal generated at the measurement point itself, and wherein the reference magnetic field pulse signal is a signal with known amplitude and shape at the measurement point which is generated by the reference device;
- the fiber device transmitting the optical signal coming from the magneto-optic probe to the power supply and signal processing module by two paths;
- and
- the power supply and signal processing module receiving the optical signal coming from the magneto-optic probe by two paths, converting the two paths of optical signal into two paths of electric signal respectively, and processing the two paths of electric signal based on the reference magnetic field pulse signal, so as to obtain the magnetic field information and/or current information at the measurement point itself.
Dependencies are inferred from the claim text.