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Polarization insensitive current and magnetic sensors with active temperature compensation

A technology of current sensor and temperature sensor, which is applied in the direction of magnetic field measurement, thermometer, voltage/current isolation, etc. using magneto-optical equipment, which can solve the problems affecting the accuracy of current detection and achieve the effect of avoiding electromagnetic interference

Active Publication Date: 2017-08-22
姚晓天 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, magnetic field interference from adjacent current conductors will also affect current detection accuracy and need to be reduced or eliminated

Method used

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  • Polarization insensitive current and magnetic sensors with active temperature compensation
  • Polarization insensitive current and magnetic sensors with active temperature compensation
  • Polarization insensitive current and magnetic sensors with active temperature compensation

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Embodiment Construction

[0062] In the present invention, optical sensing can be used for long-distance measurement of current or temperature, and the detection light is transmitted from the base station to the optical sensor probe placed at the position of the measured target through an optical fiber, and then the light is returned from the optical sensor probe to the base station. Carry the measured current or temperature information.

[0063] A more compact sensor head can be designed using a polarization-sensitive sensor head that produces output power fluctuations with polarization of the input light. This polarization sensitivity can be reduced by using a low polarization light source such as an ASE light source. The reflective design in the example of the present invention makes optical integration easier. For example, the input optics employs a light source with a low degree of polarization without limiting the polarization direction, which reduces the sensitivity of the optical sensing head ...

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Abstract

The ivnention discloses a current sensor based on optical sensing and a corresponding temperature sensor. The current sensor comprises: a light source, a first transmission fiber, an optical current sensor probe comprising a beam shifter, a Faraday material, an output beam shifter, a second transmission fiber, an optical detection unit and a measurement module. According to the invention, a polarization insensitive current and magnetic sensor and a system thereof adopting active temperature compensation can ensure sensing precision, measurement range and stability of the optical fiber current sensor when sensing the circuit.

Description

technical field [0001] The present application relates to the field of current and temperature sensing, in particular, to a polarization-insensitive current and magnetic field sensor using active temperature compensation. Background technique [0002] Electric current is produced by the flow of electric charge in a conductor such as a metal. Considering the electronic properties of electric current, most current techniques and devices for sensing or measuring electric current are based on electronic circuits. Electronic circuits often require power and are therefore subject to electromagnetic interference (EMI). Various electronic circuits for sensing currents need to be placed in close proximity to the measured current, thus increasing limitations in practical applications. [0003] Current sensing technology based on optical fiber sensing has attractive advantages in monitoring, controlling and protecting substations and power distribution systems of smart grids. Compar...

Claims

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Application Information

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IPC IPC(8): G01R15/24G01R19/32G01R33/032G01K11/32
CPCG01K11/32G01R15/246G01R19/32G01R33/0322
Inventor 姚晓天
Owner 姚晓天
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