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Difference-stream detecting method based on BSO (Bi12SiO20) crystal and device for realizing same

A detection method and detection device technology, applied in the field of optical detection, can solve the problems of electromagnetic interference, high cost, low measurement accuracy, etc., and achieve the effects of low electromagnetic interference, high accuracy, and cost reduction

Inactive Publication Date: 2011-02-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that existing optical detection instruments for current transmission abnormality detection have the problems of electromagnetic interference during light propagation, low measurement accuracy and high cost, the present invention proposes a differential current detection method based on BSO crystal and realizes the method installation

Method used

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  • Difference-stream detecting method based on BSO (Bi12SiO20) crystal and device for realizing same
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  • Difference-stream detecting method based on BSO (Bi12SiO20) crystal and device for realizing same

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specific Embodiment approach 1

[0013] Specific embodiments 1. The differential flow detection method based on BSO crystal, the specific process is as follows:

[0014] Step 1. The first polarized beam 1-1 and the second polarized beam 2-1 are vertically incident on the center positions of the light-receiving surfaces of the first BSO optical crystal 3 and the second BSO optical crystal 4 respectively, and the first polarized beam 1- 1 and the second polarized beam 2-1 are two beams of polarized light with the same frequency and the same intensity, and the polarization directions of the first polarized beam 1-1 and the second polarized beam 2-1 are orthogonal, and the first BSO optical rotation The crystal 3 and the second BSO optically active crystal 4 are respectively arranged around the same transmission line, and are arranged at different positions of the same transmission line, the distance from the transmission line is equal, and within the range of the magnetic field generated by the transmission curre...

specific Embodiment approach 2

[0020] Specific embodiment two, combine figure 2 and Figure 4 Describe this embodiment, the device for realizing the differential current detection method based on BSO crystal, which includes a first light source 1, a beam splitting converter 13, a first BSO optically active crystal 3, a second BSO optically active crystal 4, a first semi-transparent and semi-reflective mirror 5, the first total reflection mirror 6 and photodetector 7, the light beam emitted by the first light source 1 is incident to the beam splitting converter 13, and the light passing through the beam splitting converter 13 is divided into the same frequency, same intensity and polarization direction Orthogonal first polarized light beam 1-1 and second polarized light beam 2-1, the first polarized light beam 1-1 is vertically incident on the center position of the light receiving surface of the first BSO optical rotation crystal 3, the first BSO optical rotation The transmitted light of the crystal 3 is ...

specific Embodiment approach 3

[0022] Specific embodiment three, combine figure 2 and Figure 4 Describe this embodiment, the difference between this embodiment and the second embodiment is that the beam splitter 13 is composed of a half-wave plate 8, a second half-mirror 9 and a second full-mirror 10, and the first light source 1 The emitted light beam is incident on the center position of the second half-mirror 9 and is divided into transmitted light beams and reflected light beams with equal intensity. The reflected beam of 10 is the first polarized beam 1-1, and the beam of the transmitted beam after passing through the half-wave plate 8 is the second polarized beam 2-1.

[0023] The light source described in this embodiment has one, the first polarized light beam 1-1 and the second polarized light beam 2-1 are emitted by one light source, and the intensity of the first polarized light beam 1-1 is equal to the intensity of the light beam emitted by the first light source 1. Half, the intensity of the...

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Abstract

The invention provides a difference-stream detecting method based on a BSO (Bi12SiO20) crystal and a device for realizing the same, which relates to a difference-stream detecting method and a difference-stream detecting device. The invention solves the problems of electromagnetic interference, low measuring accurate rate and high cost of the traditional optical detecting instrument for current-transmission anomaly detection in a light propagation process. The difference-stream detecting method specifically comprises the following steps of: firstly, respectively and vertically injecting a first polarization beam and a second polarization beam to a first BSO gyrotropic crystal and a second BSO gyrotropic crystal; and secondly, injecting emitted beams to a photodetector at the same time and judging whether the anomaly transmission appears by judging whether interference fringes appear on the photodetector. In the device, beams transmitted by a first light source and a second light source are respectively and vertically injected to the center positions of the first BSO gyrotropic crystal and the second BSO gyrotropic crystal, and emitted light is transmitted to a photosurface of the photodetector. The invention is suitable for the field of the anomaly detection of current transmission.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to a differential flow measurement method and device. Background technique [0002] At present, the optical instrument that detects whether the current transmission in the wire is abnormal is a device that detects whether the light intensity of the light beam passes through the optical current transformer. The optical information received by the photoelectric converter in the light intensity detection device is passed through the current mutual induction After the changed optical information is generated, the two photoelectric converters compare the two beams of light received with digital signals. If there is a difference between the two digital signals, it means that there is an abnormality in the current during the transmission of light, so the photoelectric conversion The light beam of the detector is also changed, which activates the current protection device. The disadvantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G01R19/00
Inventor 申岩郭志忠张国庆于文斌路忠峰吴磊
Owner HARBIN INST OF TECH
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