CN102411080A - Optical electric field sensor - Google Patents
Optical electric field sensor Download PDFInfo
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- CN102411080A CN102411080A CN2011103765887A CN201110376588A CN102411080A CN 102411080 A CN102411080 A CN 102411080A CN 2011103765887 A CN2011103765887 A CN 2011103765887A CN 201110376588 A CN201110376588 A CN 201110376588A CN 102411080 A CN102411080 A CN 102411080A
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Abstract
The invention discloses a passive optical electric field sensor for measuring electric fields or high voltages, belonging to the technical field of electric measurement. The passive optical electric field sensor comprises two optical crystals, wherein one of the optical crystals is positioned in the environments of a tested electric field as well as interference fields such as temperature, vibration and the like, and the other optical crystal is only positioned in the environments of interference fields such as the same temperature, vibration and the like; and after polarized light is emitted by the two crystals, modulation of interference fields such as temperature, vibration and the like is eliminated. A signal which is proportional to the tested electric field or a high voltage is output though a signal processing circuit, and is not influenced by interference factors such as temperature, vibration and the like. The optical electric field sensor disclosed by the invention can be used for measuring electric fields or high voltages, is particularly used for detecting electric fields in the power industry, monitoring electric fields or high voltages of buses, has high stability, and is not influenced by temperature or stress easily.
Description
Technical field
The invention belongs to the Electrical Measurement Technology field; Be specifically related to a kind of passive optical electric-field sensor that is used to measure electric field or voltage; This sensor especially is suitable for measuring the space highfield of electric system or the high voltage on the power bus-bar; More general optical electric field sensor stability is high, than the traditional sensors bandwidth.
Background technology
Electric field measurement is significant in many scientific researches and field of engineering technology, particularly has widespread use in fields such as electric system, electromagnetic compatibility and microwave technologies.For example, in power industry, electric field measurement can be used for POWER SYSTEM STATE monitoring, electrical equipment inner electric field and outer electric field distribution measuring, high-voltage test and the research of corona discharge phenomenon, the high-tension measurement of electrical system bus etc.; In the electromagnetic compatibility area research, that electric field measurement can be used for detecting is electric, the external electromagnetic radiation of electronic equipment and interference and research environment electric field be to the influence of electronic device operation; In microwave technology, need measure microwave emission and electric field around the receiving equipment.Optical electric field sensor is made up of devices such as optical glass based on the optical sensing principle, and volume is little, and tested electric field is not almost had disturbance.
Optical electric field sensor based on the linear electro-optic effect principle has been used to Electric Field Distribution and the high-tension measurement of electrical system bus; But the stability of sensor is subject to the influence of factors such as environment temperature, vibration; A kind of typical scenario of improving its stability adopts reflective bifocal path structure exactly; Utilize the linear electro-optic effect of an optical crystal to come the tested electric field of sensing in the scheme,, utilize the output of two light paths to do the influence that disturbing factor is handled in computing when the interference birefringence that causes by factors such as temperature, vibrations during much smaller than the birefringence that produces by electric field; But according to actual measurement and operation result, the stability of its long-time running still fails effectively to solve.
Summary of the invention
The object of the present invention is to provide a kind of passive optical electric-field sensor, this sensor still can satisfy basic accuracy index request when such environmental effects such as temperature change, existence vibration, can be in the medium-term and long-term stable work of actual motion.
A kind of passive optical electric-field sensor provided by the invention; It is characterized in that it comprises incident optical, optical fiber collimator, Tp, the incident light polarizer, first optical crystal, half-wave plate, Tp, Tp, second optical crystal, analyzer, optical fiber collimator, outgoing optical fiber and ground electrode;
First optical crystal is among the tested electric field E, and second optical crystal is in the ground electrode, and the electric field intensity of second optical crystal environment of living in is zero;
Incident light incides Tp through incident optical through optical fiber collimator, by Tp the incident light total internal reflection is changed the direct of travel of light, reenters to become linearly polarized light, linearly polarized light incident first optical crystal after penetrating the polarizer;
Pass through half-wave plate, Tp and Tp successively from the light of the first optical crystal outgoing; Half-wave plate, Tp and Tp change the direct of travel of light; Change the direction of vibration of polarized lightwave simultaneously; Incide second optical crystal again, after the second optical crystal outgoing, again behind optical fiber collimator by the outgoing of outgoing optical fiber.
Technique effect of the present invention is:
1. first optical crystal is in the tested electric field region, receives the modulation of interference fields such as tested electric field and temperature, vibration simultaneously;
2. second optical crystal is in earth potential one side, only receives the modulation of interference fields such as temperature, vibration;
3. the modulation signal that only contains tested electric field in the output light signal of sensor has been eliminated temperature, vibration etc. and has been disturbed the influence to sensor;
4. the output of sensor only needs a light path, has simplified the manufacture craft of sensor, is more conducive to produce in batches.
Optical sensor sensor of the present invention adopts two optical crystals; On structural design, can eliminate of the influence of interference fields such as temperature, vibration, need not in signal Processing, to do correlative compensation, therefore stability; This optical electric field sensor can steady in a long-termly move, and is beneficial to batch process.
Description of drawings
Fig. 1 is the structural representation of optical electric field sensor of the present invention;
Fig. 2 is applied to the concrete realization figure of high voltage bus voltage transformer (VT) for optical electric field sensor of the present invention.
Embodiment
By embodiment the present invention is described in further detail below, but following examples only are illustrative, protection scope of the present invention does not receive the restriction of these embodiment.
As shown in Figure 1, a kind of passive optical electric-field sensor provided by the invention comprises incident optical 17, optical fiber collimator 15, Tp 9, the incident light polarizer 3, first optical crystal 1, half-wave plate 4, Tp 5, Tp 6, second optical crystal 2, analyzer 7, optical fiber collimator 16, outgoing optical fiber 18 and ground electrode 8.
First optical crystal 1 is among the tested electric field E, and second optical crystal 2 is in the ground electrode 8, and the electric field intensity of second optical crystal, 2 environment of living in is zero.
Light path between first optical crystal 1 and second optical crystal 2 realizes turning to of light path through half-wave plate 4, Tp 5 and Tp 6 successively, changes the direction of vibration of polarized lightwave simultaneously.
First optical crystal 1 receives the modulation of interference fields such as tested electric field and temperature, vibration simultaneously, and second optical crystal 2 only receives the modulation of interference fields such as temperature, vibration.Light beam through behind first optical crystal 1 and second optical crystal 2, is cancelled out each other by the modulation of interference fields such as temperature, vibration successively, and the modulating part of electric field is only arranged in the light beam of outgoing.
Incident light incides Tp 9 through incident optical 17 through optical fiber collimator 15; Change the direct of travel of light by 9 pairs of incident light total internal reflections of Tp; Reenter and become linearly polarized light after penetrating the polarizer 3; Linearly polarized light incident first optical crystal 1; Receive the modulation of interference fields such as extra electric field E and temperature, vibration; Produce birefringence; The birefringence optics phase delay that first optical crystal 1 produces is
phase delay for produced by extra electric field E modulation wherein for
, and Δ δ is the phase delay that produced by interference fields such as temperature, vibration.Pass through half-wave plate 4, Tp 5 and Tp 6 successively from the light of first optical crystal, 1 outgoing; Half-wave plate 4, Tp 5 and Tp 6 change the direct of travel of light; Change the direction of vibration of polarized lightwave simultaneously; Incident second optical crystal 2 again; Second optical crystal 2 is in the earth potential side, does not receive the influence of extra electric field, but owing to be in the environment such as same temperature, vibration with first optical crystal 1; Second optical crystal 2 is owing to the birefringence light beam phase delay that environmental disturbances such as temperature, vibration produce is-Δ δ; The optical phase put-off of the whole optical path after 2 outgoing of second optical crystal is the phase delay sum that first optical crystal 1 and second optical crystal 2 produce, for
through analyzer 7, after optical fiber collimator 16 outgoing; Eliminate the item of interference fields such as temperature, stress in the light signal, only kept the phase delay item that tested electric field E modulation produces.
Example: as shown in Figure 2, in the time of in the middle of optical electric field sensor S of the present invention is installed on high-tension insulator 12, the high voltage U on the bus 11
XBe applied on the optical electric field sensor through high pressure conducting rod 10; The electric field that is formed by high-field electrode 11 and ground electrode 8 is to first optical crystal, the 1 generation optical modulation of optical electric field sensor; The output light signal of sensor can obtain and tested bus high voltage U through optical cable 13 entering signal treatment circuits 14
XThe small voltage signal that is directly proportional.
The present invention not only is confined to above-mentioned embodiment; Persons skilled in the art are according to content disclosed by the invention; Can adopt other multiple embodiment embodiment of the present invention, therefore, every employing project organization of the present invention and thinking; Do some simple designs that change or change, all fall into the scope of the present invention's protection.
Claims (1)
1. passive optical electric-field sensor; It is characterized in that it comprises incident optical (17), optical fiber collimator (15), Tp (9), the incident light polarizer (3), first optical crystal (1), half-wave plate (5), Tp (5), Tp (6), second optical crystal (2), analyzer (7), optical fiber collimator (16), outgoing optical fiber (18) and ground electrode (8);
First optical crystal (1) is among the tested electric field E, and second optical crystal (2) is in the ground electrode (8), and the electric field intensity of second optical crystal (2) environment of living in is zero;
Incident light incides Tp (9) through incident optical (17) through optical fiber collimator (15); The incident light total internal reflection is changed the direct of travel of light by Tp (9); Reenter and become linearly polarized light, linearly polarized light incident first optical crystal (1) after penetrating the polarizer (3);
Pass through half-wave plate (5), Tp (5) and Tp (6) successively from the light of first optical crystal (1) outgoing; Half-wave plate (5), Tp (5) and Tp (6) change the direct of travel of light; Change the direction of vibration of polarized lightwave simultaneously; Incide second optical crystal (2) again, after second optical crystal (2) outgoing, again behind optical fiber collimator (16) by outgoing optical fiber (18) outgoing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110376588 CN102411080B (en) | 2011-11-23 | 2011-11-23 | Optical electric field sensor |
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| CN 201110376588 CN102411080B (en) | 2011-11-23 | 2011-11-23 | Optical electric field sensor |
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| CN102411080A true CN102411080A (en) | 2012-04-11 |
| CN102411080B CN102411080B (en) | 2013-05-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308783A (en) * | 2013-05-23 | 2013-09-18 | 国家电网公司 | Distributed feedback (DFB) laser-based optical crystal electric field sensor |
| CN104020360A (en) * | 2014-06-27 | 2014-09-03 | 上海交通大学 | Accurate high-voltage electric field measuring method and device based on bracket type fiber grating |
| CN105116196A (en) * | 2015-07-22 | 2015-12-02 | 华中科技大学 | Feedback homodyne optical voltage sensor |
| CN109030904A (en) * | 2018-07-13 | 2018-12-18 | 福州大学 | A kind of temperature self-compensation method of longitudinal modulation optical voltage transformer |
| CN114720782A (en) * | 2022-03-10 | 2022-07-08 | 云南电网有限责任公司电力科学研究院 | Packaging device and electro-optical sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000235049A (en) * | 1998-12-18 | 2000-08-29 | Nissin Electric Co Ltd | Photovoltage/electric field sensor |
| CN101285855A (en) * | 2008-01-31 | 2008-10-15 | 西北工业大学 | Self focusing -type optical current mutual inductor |
| CN101819225A (en) * | 2010-05-12 | 2010-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Magneto-optical current sensor and manufacturing method thereof |
| CN201804036U (en) * | 2010-09-17 | 2011-04-20 | 淄博思科电子技术开发有限公司 | Full optical fiber current transformer |
| CN202330527U (en) * | 2011-11-23 | 2012-07-11 | 华中科技大学 | Optical electric field sensor |
-
2011
- 2011-11-23 CN CN 201110376588 patent/CN102411080B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000235049A (en) * | 1998-12-18 | 2000-08-29 | Nissin Electric Co Ltd | Photovoltage/electric field sensor |
| CN101285855A (en) * | 2008-01-31 | 2008-10-15 | 西北工业大学 | Self focusing -type optical current mutual inductor |
| CN101819225A (en) * | 2010-05-12 | 2010-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Magneto-optical current sensor and manufacturing method thereof |
| CN201804036U (en) * | 2010-09-17 | 2011-04-20 | 淄博思科电子技术开发有限公司 | Full optical fiber current transformer |
| CN202330527U (en) * | 2011-11-23 | 2012-07-11 | 华中科技大学 | Optical electric field sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308783A (en) * | 2013-05-23 | 2013-09-18 | 国家电网公司 | Distributed feedback (DFB) laser-based optical crystal electric field sensor |
| CN103308783B (en) * | 2013-05-23 | 2015-12-09 | 国家电网公司 | Based on the optical crystal electric-field sensor of Distributed Feedback Laser |
| CN104020360A (en) * | 2014-06-27 | 2014-09-03 | 上海交通大学 | Accurate high-voltage electric field measuring method and device based on bracket type fiber grating |
| CN105116196A (en) * | 2015-07-22 | 2015-12-02 | 华中科技大学 | Feedback homodyne optical voltage sensor |
| CN109030904A (en) * | 2018-07-13 | 2018-12-18 | 福州大学 | A kind of temperature self-compensation method of longitudinal modulation optical voltage transformer |
| CN114720782A (en) * | 2022-03-10 | 2022-07-08 | 云南电网有限责任公司电力科学研究院 | Packaging device and electro-optical sensor |
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| CN102411080B (en) | 2013-05-22 |
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