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Optical fiber grating current sensor based on heating sheet and detection method of optical fiber grating current sensor

A technology of current sensor and optical fiber grating, which is applied in the field of optical fiber grating current sensor and current detection, so as to avoid electromagnetic interference, improve the accuracy of detection, and improve the safety effect

Inactive Publication Date: 2014-01-22
河北地质大学
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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 that can be applied to the environment with magnetic field interference, especially in a strong magnetic field, and can A new type of current detection device that effectively increases detection accuracy

Method used

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  • Optical fiber grating current sensor based on heating sheet and detection method of optical fiber grating current sensor
  • Optical fiber grating current sensor based on heating sheet and detection method of optical fiber grating current sensor
  • Optical fiber grating current sensor based on heating sheet and detection method of optical fiber grating current sensor

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Embodiment 1

[0077] as attached figure 1 As shown, the current sensor of this embodiment includes a mica heating sheet 1 , a test grating 2 in contact with the heating sheet 1 and a compensation grating 3 connected in series with the testing grating 2 . Among them, the manufacturer of the heating plate is Shenzhen Yuansheng Electronic Accessories Co., Ltd.; the test fiber grating and compensation fiber grating are commercially available uniform Bragg gratings. The current sensor of this embodiment also includes a lead wire 1-1 drawn from the heating sheet 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 grating network analyzer.

[0078] This embodiment is applied to the detection of the power supply, the power supply is connected to the heating sheet, and the heating sheet and the heating sheet are placed in a magnetic field for electromagnetic interference.

[0079] Step 1: the compensatio...

Embodiment 2

[0086] as attached figure 2 and 3 As shown, the current sensor in this embodiment includes a silicone heating sheet 1 , a test grating 2 in contact with the silicone heating sheet 1 and a compensation grating 3 connected in series with the test grating 2 . Among them, the manufacturer of the silicone heating sheet is Shenzhen Guoweiwei Electric Appliance Co., Ltd.; the test fiber grating and compensation fiber grating are commercially available uniform Bragg gratings. The current sensor of this embodiment also includes a lead wire 1-1 drawn from the silicone heating sheet 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 grating network analyzer.

[0087] This embodiment is applied to the detection of power supply:

[0088] Step 1: The compensation grating 3 is externally connected to a fiber grating network analyzer, and the initial central wavelength is determined to be 1540n...

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Abstract

The invention relates to a current sensor, in particular to an optical fiber grating current sensor based on a heating sheet and a detection method of the optical fiber grating current sensor. The optical fiber grating current sensor comprises a heating sheet, a test grating and a compensation grating, the test grating is in contact with the heating sheet, and the compensation grating is connected in series with the test grating. The heating 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 effectively 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 passage, 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 fiber grating current sensor based on a heating sheet. [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 IP will generate magnetic force lines ①, the primary magnetic force lines are concentrated around the magnetic core ②, and the Hall electrode ③ built in the air gap of the magnetic core can generate and primary side The magnetic field line ① is proportional to the voltage of only a few millivolts, and the electronic circuit ④ can convert this tiny signal into a secondary current IS ⑤, and the following relationship (3) exists: [0004] The main calculation formula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 文继华朱月红亢俊健
Owner 河北地质大学