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A kind of fiber grating current sensor based on refrigeration sheet and its detection method

A technology of current sensor and optical fiber grating, which is applied in the field of detection current and optical fiber grating current sensor, to achieve the effect of increasing the applicable environmental range, improving safety, and avoiding wrong information

Inactive Publication Date: 2017-01-11
石家庄普特光纤应用技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] Therefore, when the existing current sensor cannot avoid the interference of the external electromagnetic field on the detection result, it is necessary to develop a current detection device suitable for the environment with magnetic field interference, especially suitable for the current detection device under the strong magnetic field ; A new type of current sensor that effectively increases the detection accuracy

Method used

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  • A kind of fiber grating current sensor based on refrigeration sheet and its detection method
  • A kind of fiber grating current sensor based on refrigeration sheet and its detection method
  • A kind of fiber grating current sensor based on refrigeration sheet and its detection method

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Embodiment 1

[0079] as attached figure 1 As shown, the current sensor in this embodiment includes a semiconductor cooler 1 , a test grating 2 in contact with the semiconductor cooler 1 and a compensation grating 3 connected in series with the test grating 2 . Among them, the semiconductor cooling chip is a single-stage cooling chip, and the manufacturer and model are Hebei Yuxiang Electronics TEC1-12705; the test grating is a C-band apodized fiber grating, and the manufacturer and model are GE-FBG1 gratings of Hebei Dijing Optoelectronics Technology Co., Ltd.; compensation The grating is a C-band apodized fiber grating, and the manufacturer and model are GE-FBG1 gratings from Hebei Dijing Optoelectronics Technology Co., Ltd. The current sensor of this embodiment also includes a lead wire 1-1 drawn from the semiconductor refrigeration chip 1 and an optical fiber 4 connected to the test grating 2 and the compensation grating 3, and the end of the optical fiber 4 is connected to a fiber grati...

Embodiment 2

[0091] as attached figure 1 As shown, the current sensor in this embodiment includes a semiconductor cooler 1 , a test grating 2 in contact with the semiconductor cooler 1 and a compensation grating 3 connected in series with the test grating 2 . Among them, the three-stage cooling chip is composed of three single-stage cooling chips connected in series, the semiconductor cooling chip is a single-stage cooling chip, the manufacturer and model are Hebei Yuxiang Electronics TEC1-12705; the test grating is a C-band apodized fiber grating, the manufacturer and The model is GE-FBG1 grating of Hebei Dijing Optoelectronics Technology Co., Ltd.; the compensation grating is C-band apodized fiber grating, and the manufacturer and model are GE-FBG1 gratings of Hebei Dijing Optoelectronics Technology Co., Ltd. The current sensor of this embodiment also includes a lead wire 1-1 drawn from the semiconductor refrigeration chip 1 and an optical fiber 4 connected to the test grating 2 and the ...

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Abstract

The invention relates to a current sensor, in particular to an optical fiber grating current sensor based on a refrigeration sheet and a detection method of the optical fiber grating current sensor. The optical fiber grating current sensor comprises a semiconductor refrigeration sheet, a testing grating and a compensation grating, wherein the testing grating is in contact with the semiconductor refrigeration sheet, and the compensation grating is connected in series with the testing grating. The semiconductor refrigeration sheet is adopted to be used as an element for detecting the current intensity, the external electromagnetic interference is effectively avoided, the detection accuracy is improved, and the optical fiber grating current sensor is particularly suitable for the current detection in a strong magnetic field. The optical fiber grating is adopted as a signal sensing channel, higher safety is realized, in addition, error information caused by power supply interference can be avoided, and higher stability and higher accuracy are realized. Therefore, the application environment range of the current sensor can be effectively enlarged, and in addition, and the detection precision in the magnetic environment is improved.

Description

technical field [0001] The invention relates to a current sensor, in particular to a cooling sheet-based fiber grating current sensor. [0002] The invention also relates to a method for detecting an electric current. Background technique [0003] The existing current sensors are all based on the closed-loop Hall effect current sensor, which utilizes the electromagnetic field principle of the primary wire. The Hall effect means that when the primary wire passes through the current sensor, the primary current I P Magnetic force lines ① will be generated, and the primary side magnetic force lines are concentrated around the magnetic core ②. The Hall electrode ③ built in the air gap of the magnetic core can generate a voltage of only a few millivolts proportional to the primary side magnetic force lines ①. The electronic circuit ④ can put This tiny signal is transformed into the secondary current I s ⑤, and the following relationship exists: [0004] The main calculation fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
Inventor 文继华朱月红亢俊健梁萍
Owner 石家庄普特光纤应用技术有限公司
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