CN103235196A - Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system - Google Patents
Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system Download PDFInfo
- Publication number
- CN103235196A CN103235196A CN2013101289207A CN201310128920A CN103235196A CN 103235196 A CN103235196 A CN 103235196A CN 2013101289207 A CN2013101289207 A CN 2013101289207A CN 201310128920 A CN201310128920 A CN 201310128920A CN 103235196 A CN103235196 A CN 103235196A
- Authority
- CN
- China
- Prior art keywords
- optic interferometer
- sensor
- fibre optic
- radial groove
- electrode plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
A fluid dynamics based all-fiber high-voltage pulsed electric field sensor comprises a container containing liquid, a fiber optic interferometer, two plate electrodes and a capillary glass tube. The fiber optic interferometer is encapsulated in the capillary glass tube to form a measuring portion, the measuring portion and the two plate electrodes are all immersed in the liquid in the container, the two plate electrodes are opposite and mutually parallel, and the measuring portion is disposed at the position between the two plate electrodes. One plate electrode is connected with the surface of measured electrical equipment through a lead, and the other plate electrode is grounded through a lead. The sensor has the technical advantages of small size, easiness in production, low cost, high sensitivity, light weight, and being free of influences on a measured electric field and particularly suitable for all-optical remote long-time real-time monitoring of high electric fields or pulsed electric fields.
Description
Technical field
The present invention relates to a kind of electric field measurement technology, relate in particular to a kind of based on fluid dynamic full optical fiber high-pressure pulse electric sensor and sensor-based system.
Background technology
Electric field measurement is significant in many scientific researches and field of engineering technology, determine electric field intensity exactly, for performance and the structure of optimizing high voltage electric equipment, and to understand its periphery electromagnetic environment be very necessary: as determining near the electric field distribution law the high pressure equipment such as insulator, lightning arrester, just can improve the shape design of insulator, lightning arrester, thereby further improve these equipment reliabilities of operation; Determine the Transient Electric Field that switching manipulation in the high voltage substation produces, just can understand the interior electromagnetic environment in station, thereby provide strong foundation for the protection of electromagnetic interference (EMI); In addition, transient electric field also has in various degree influence to some vegetable seedss and growth, if can accurately measure the distribution of transient electric field, just can kindly add utilization to it; Therefore high electric field is measured accurately and had important practice value, the high-voltage electric field sensor of research novel practical seems particularly important.
In the electric field measurement field, to compare with traditional sensors, optical electric field sensor has containing metal element not, tested electric field is disturbed little advantage.Very extensive to the electric-field sensor research based on optics at present, main measuring principle has based on electrooptical effect, inverse piezoelectric effect, evanescent field interference etc., wherein there is the low defective of measurement range in the measuring system based on an electrooptical effect (Pockels effect), measuring system based on quadratic electro-optical effect (Kerr effect), its measurement range is big slightly than the Pockels effect, but still rest on the laboratory study stage, be difficult to practicability; Integrated form optics electric-field sensor is the important trend of development, and most of integrated form optics electric-field sensor all is based on optical waveguide, but the optical waveguide cost of manufacture height of this integrated form, the process complexity, and device volume is bigger.In addition, also have the researcher to utilize quartzy inverse piezoelectric effect to produce the electric-field sensor of full fiber type, but this system utilizes the intermode interference principle to measure, make its Installation and Debugging difficulty; Also realized full optical fiber measurement though utilize evanescent field to interfere to measure electric field, its response time is very long, is not suitable for the measurement of pulse voltage.Another injects photonic crystal fiber with liquid crystal and realizes the full Fibre Optical Sensor measured, and temperature influence is bigger, also only also is confined to the laboratory study stage.
Summary of the invention
At the problem in the background technology, the present invention proposes a kind ofly based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is made up of the container that is packaged with liquid, fibre optic interferometer, two electrode plate and glass capillary; Described fibre optic interferometer structure is: general single mode fiber is provided with radial groove, radial groove is in the degree of depth that general single mode fiber directly makes progress is goed deep into the fibre core of general single mode fiber, fibre core is partly clipped, the remaining portion of fibre core forms the reference arm of fibre optic interferometer, and the hollow space in the radial groove forms the signal arm of fibre optic interferometer; Fibre optic interferometer is encapsulated in the glass capillary, forms measurement section; Measurement section and two electrode plate all are immersed in the liquid in the container, and two cube electrode positions are parallel to each other relatively, and measurement section places the position between two electrode plate; Wherein an electrode plate is connected with tested electrical equipment surface by lead; Another electrode plate is by lead ground connection; Aforementioned structure namely forms electric-field sensor.During concrete the installation, can utilize chamber wall as supporting construction, be used to fibre optic interferometer and battery lead plate to provide support.
The principle of work of this electric-field sensor is: as shown in Figure 3, when light is gone into and arrived radial groove when zone from an end-fire of fibre optic interferometer, light is divided into two-beam at the end face at A place, a branch of light continues to propagate forward by fibre core, another Shu Guang enters in the interior air dielectric of radial groove, because air is different with the fiber core refractive index, this just causes two-beam to have optical path difference after by the radial groove zone, that Shu Guang that enters in the air dielectric will interfere with that Shu Guang by the fibre core transmission when the end face at B place is coupled back in the fibre core, when input light was single wavelength laser, interference light intensity was a fixed value; When voltage is applied in the liquid in the container by battery lead plate, flow phenomenon can appear in the liquid between the battery lead plate, because the measuring point is between two battery lead plates, liquid flow will drive measurement section and vibrate, thereby the signal arm length on the fibre optic interferometer is changed, the signal arm length variations finally can cause the light intensity of interference signal to change, can realize measurement to the input voltage of battery lead plate also just having realized the measurement to electric field indirectly by the light intensity variable quantity that detects interference signal; Because quality, the volume of measurement section are all very little, so measurement section is very responsive to liquid flow, add liquid flow to the susceptibility of voltage, so this sensor is particularly suitable for the measurement of very short high impulse electric field of paired pulses time (as thunderbolt);
Among the present invention, adopt glass capillary to come the reason of packaged fiber interferometer to be: refractive index can change during because of liquid flow, if fibre optic interferometer directly is immersed in (being that the interior light-conductive media of signal arm is liquid) in the liquid, this will make the medium refraction index in the signal arm exist uncertain, thereby measurement result is impacted, so adopt glass capillary that liquid and fibre optic interferometer are isolated, with the influence that guarantees that a whole measurement result liquid body flows.
In the actual engineering, the high impulse instantaneous voltage might be very big, if the employing common liq because its resistivity is less, may directly conduct electricity or make the liquid between two electrode plate breakdown, thereby cause tested electrical equipment to damage, at this problem, the present invention has also done following improvement: described liquid adopts insulating oil, and the resistivity of insulating oil is very big, can avoid the liquid between two electrode plate breakdown, thereby avoid tested electrical equipment to damage.
Because the fibre core of optical fiber is very very thin, rupture for fear of fibre core in processing, installation, use, also in order to reduce processing and mounting hardness, the present invention has also done following improvement: the degree of depth that described radial groove gos deep into fibre core is less than or equal to fiber core radius simultaneously.
In addition, at general single mode fiber commonly used, the invention allows for the following preferred parameter plan of establishment: be 8 microns if described general single mode fiber diameter is 125 microns, core diameter, then the degree of depth that directly makes progress at general single mode fiber of radial groove is 62 microns.
The present invention has also proposed the following preferred parameter plan of establishment at radial groove: the length of radial groove on general single mode fiber is axial is 50 ~ 110 microns.
Acting force when making liquid flow is applied on the measurement section more effectively, and the present invention has also done following improvement: described measurement section axially and the battery lead plate plane parallel;
Based on aforementioned schemes, the invention allows for following sensor-based system, it is made up of electric-field sensor, LASER Light Source, photodetector and digital oscilloscope; One end of the fibre optic interferometer in the electric-field sensor is connected with LASER Light Source by Transmission Fibers, and the other end of fibre optic interferometer is connected with photodetector by Transmission Fibers, and photodetector is connected with digital oscilloscope.
The principle of work of this sensor-based system is: LASER Light Source is exported the exciting light of single wavelength to fibre optic interferometer, photodetector is monitored the interference light intensity of fibre optic interferometer output and is amplified, digital oscilloscope carries out record to the signal that photodetector collects, by the data that get access in the certain hour section are carried out analyzing and processing, can obtain the information of external electrical field.
Useful technique effect of the present invention is: little, the easy making of volume, cost be low, highly sensitive, in light weight, can not exert an influence to tested electric field, is particularly suitable for high electric field or impulse electric field are carried out full light, remote, monitoring in real time for a long time.
Description of drawings
Fig. 1, electric-field sensor structural representation of the present invention (mark D shown device is tested electrical equipment among the figure);
Fig. 2, fibre optic interferometer structure vertical view of the present invention (structure shown in the mark C is radial groove among the figure);
Fig. 3, fibre optic interferometer structure cut-open view of the present invention;
Fig. 4, sensor-based system structural representation of the present invention.
Embodiment
A kind of based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is made up of the container 1 that is packaged with liquid, fibre optic interferometer 2, two electrode plate 3 and glass capillary 4;
Described fibre optic interferometer 2 structures are: general single mode fiber 2-1 is provided with radial groove, radial groove is in the degree of depth that general single mode fiber 2-1 directly makes progress is goed deep into the fibre core 2-3 of general single mode fiber 2-1, fibre core 2-3 is partly clipped, the remaining portion of fibre core 2-3 forms the reference arm of fibre optic interferometer 2, and the hollow space in the radial groove forms the signal arm of fibre optic interferometer 2;
Fibre optic interferometer 2 is encapsulated in the glass capillary 4, forms measurement section;
Measurement section and two electrode plate 3 all are immersed in the liquid in the container 1, and two electrode plate, 3 positions are parallel to each other relatively, and measurement section places the position between two electrode plate 3;
Wherein an electrode plate 3 is connected with tested electrical equipment surface by lead; Another electrode plate 3 is by lead ground connection; Aforementioned structure namely forms electric-field sensor 5.
Further, described liquid adopts insulating oil.
Further, the described radial groove degree of depth of going deep into fibre core 2-3 is less than or equal to fibre core 2-3 radius.
Further, be 8 microns if described general single mode fiber 2-1 diameter is 125 microns, fibre core 2-3 diameter, then the degree of depth that directly makes progress at general single mode fiber 2-1 of radial groove is 62 microns.
Further, the length of radial groove on general single mode fiber 2-1 is axial is 50 ~ 110 microns.
Further, the big plane parallel of the axial and battery lead plate 3 of described measurement section.
Based on the sensor-based system of fluid dynamic full optical fiber high-pressure pulse electric sensor, it is made up of electric-field sensor 5, LASER Light Source 6, photodetector 7 and digital oscilloscope 8 as previously mentioned in a kind of employing;
One end of the fibre optic interferometer 2 in the electric-field sensor 5 is connected with LASER Light Source 6 by Transmission Fibers, and the other end of fibre optic interferometer 2 is connected with photodetector 7 by Transmission Fibers, and photodetector 7 is connected with digital oscilloscope 8.
Claims (7)
1. one kind based on fluid dynamic full optical fiber high-pressure pulse electric sensor, and it is characterized in that: it is made up of the container that is packaged with liquid (1), fibre optic interferometer (2), two electrode plate (3) and glass capillary (4);
Described fibre optic interferometer (2) structure is: general single mode fiber (2-1) is provided with radial groove, radial groove gos deep in the fibre core (2-3) of general single mode fiber (2-1) in the degree of depth that general single mode fiber (2-1) footpath makes progress, fibre core (2-3) is partly clipped, the remaining portion of fibre core (2-3) forms the reference arm of fibre optic interferometer (2), and the hollow space in the radial groove forms the signal arm of fibre optic interferometer (2);
Fibre optic interferometer (2) is encapsulated in the glass capillary (4), forms measurement section;
Measurement section and two electrode plate (3) all are immersed in the liquid in the container (1), and two electrode plate (3) position is parallel to each other relatively, and measurement section places the position between two electrode plate (3);
Wherein an electrode plate (3) is connected with tested electrical equipment surface by lead; Another electrode plate (3) is by lead ground connection;
Aforementioned structure namely forms electric-field sensor (5).
2. according to claim 1 based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is characterized in that: described liquid adopts insulating oil.
3. according to claim 1 based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is characterized in that: the degree of depth that described radial groove gos deep into fibre core (2-3) is less than or equal to fibre core (2-3) radius.
4. according to claim 1 based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is characterized in that: be 8 microns if described general single mode fiber (2-1) diameter is 125 microns, fibre core (2-3) diameter, then radial groove is 62 microns in the degree of depth that general single mode fiber (2-1) footpath makes progress.
5. according to claim 1 based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is characterized in that: the length of radial groove on general single mode fiber (2-1) is axial is 50 ~ 110 microns.
6. according to claim 1 based on fluid dynamic full optical fiber high-pressure pulse electric sensor, it is characterized in that: axial and battery lead plate (3) plane parallel of described measurement section.
7. an employing is characterized in that according to claim 1 based on the sensor-based system of fluid dynamic full optical fiber high-pressure pulse electric sensor: it is made up of electric-field sensor (5), LASER Light Source (6), photodetector (7) and digital oscilloscope (8);
One end of the fibre optic interferometer (2) in the electric-field sensor (5) is connected with LASER Light Source (6) by Transmission Fibers, the other end of fibre optic interferometer (2) is connected with photodetector (7) by Transmission Fibers, and photodetector (7) is connected with digital oscilloscope (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128920.7A CN103235196B (en) | 2013-04-15 | 2013-04-15 | Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128920.7A CN103235196B (en) | 2013-04-15 | 2013-04-15 | Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103235196A true CN103235196A (en) | 2013-08-07 |
| CN103235196B CN103235196B (en) | 2015-04-08 |
Family
ID=48883247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310128920.7A Active CN103235196B (en) | 2013-04-15 | 2013-04-15 | Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103235196B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880614A (en) * | 2015-06-09 | 2015-09-02 | 华南师范大学 | Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof |
| CN105301538A (en) * | 2014-07-16 | 2016-02-03 | 中国科学院空间科学与应用研究中心 | Calibration device for electrostatic discharge monitoring instrument |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1111916A (en) * | 1993-07-07 | 1995-11-15 | 株式会社东金 | Electric field sensor |
| JP2007101384A (en) * | 2005-10-05 | 2007-04-19 | Kuresuto:Kk | Optical electric voltage/electric field sensor corresponding to direct current and isolated amplifier |
| US20110277540A1 (en) * | 2009-11-03 | 2011-11-17 | Southern Methodist University | Micro-Optical Sensor for Electric Field Detection |
| CN102928647A (en) * | 2012-10-29 | 2013-02-13 | 易能（中国）电力科技有限公司 | Optic voltage sensing system and corresponding iterative demodulation method |
-
2013
- 2013-04-15 CN CN201310128920.7A patent/CN103235196B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1111916A (en) * | 1993-07-07 | 1995-11-15 | 株式会社东金 | Electric field sensor |
| JP2007101384A (en) * | 2005-10-05 | 2007-04-19 | Kuresuto:Kk | Optical electric voltage/electric field sensor corresponding to direct current and isolated amplifier |
| US20110277540A1 (en) * | 2009-11-03 | 2011-11-17 | Southern Methodist University | Micro-Optical Sensor for Electric Field Detection |
| CN102928647A (en) * | 2012-10-29 | 2013-02-13 | 易能（中国）电力科技有限公司 | Optic voltage sensing system and corresponding iterative demodulation method |
Non-Patent Citations (4)
| Title |
|---|
| HAE YOUNG CHOI ET AL.: "All-fiber Mach-Zehnder type interferometers formed in photonic crystal fiber", 《OPTICS EXPRESS》 * |
| JEONG-HO HA ET AL.: "Integrated-Optic Electric Field Sensors utilizing Ti:LiNbO3 Mach-Zehnder Interferometric Modulators", 《2012 17TH OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2012) TECHNICAL DIGEST JULY 2012, BUSAN, KOREA》 * |
| 曲欣等: "聚合物偶极子天线型光纤电场传感器", 《光电子.激光》 * |
| 韩猛: "全光纤干涉式电磁场传感器研究", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301538A (en) * | 2014-07-16 | 2016-02-03 | 中国科学院空间科学与应用研究中心 | Calibration device for electrostatic discharge monitoring instrument |
| CN104880614A (en) * | 2015-06-09 | 2015-09-02 | 华南师范大学 | Microwave electric field intensity meter based on cold Rydberg atom interferometer and measuring method thereof |
| CN104880614B (en) * | 2015-06-09 | 2017-06-20 | 华南师范大学 | Microwave electric field intensitometer and its measuring method based on cold Rydberg atom interferometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103235196B (en) | 2015-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rajamani et al. | Plastic fiber optic sensor for continuous liquid level monitoring | |
| CN103674117B (en) | Measure entirely method and device with weak optical fiber Bragg grating temperature and strain based on Raman scattering simultaneously | |
| CN103439765B (en) | A kind of All-optical-fiber type multi-path interferometer | |
| Shao et al. | Fiber-optic magnetic field sensor using a phase-shifted fiber Bragg grating assisted by a TbDyFe bar | |
| CN104316106A (en) | Optical fiber sensor based on Mach-Zehnder interference and fiber bragg grating | |
| CN103674893B (en) | A kind of for studying magnetic fluid refractive index and temperature and the experimental provision of magnetic field dependence | |
| CN104536084A (en) | Photonic crystal fiber polarizer | |
| CN106442340B (en) | Device and method for detecting seawater salinity by long-period fiber gratings | |
| Ran et al. | Design and demonstration of a liquid level fiber sensor based on self-imaging effect | |
| CN104406573A (en) | Coreless optical fiber-based tilt angle sensor capable of discriminating direction | |
| Shao et al. | High sensitivity and dual parameters micro-tapered-LPG sensor | |
| Ni et al. | Thin-fiber-based Fabry–Pérot cavity for monitoring microfluidic refractive index | |
| CN102175645B (en) | Polarized light detection-based highly-sensitive photonic crystal fiber refractive index sensor | |
| CN103235196B (en) | Fluid dynamics based all-fiber high-voltage pulsed electric field sensor and sensing system | |
| CN206321374U (en) | A kind of fabry perot interferometer baroceptor based on optical fiber ring laser | |
| Ding et al. | Temperature-compensated balloon-like fiber magnetic field sensor with FP structure based on PDMS | |
| CN104776954A (en) | Optically-excited fiber grating cantilever beam harmonic oscillator vacuum degree sensor | |
| Zhang et al. | A MMF-TSMF-MMF structure coated magnetic fluid for magnetic field measurement | |
| Golnabi et al. | Design and operation of an evanescent optical fiber sensor | |
| CN113406740A (en) | Optical fiber sensor based on optical fiber inner long suspended fiber core structure and fiber core preparation method | |
| CN104122227A (en) | Optical fiber refractive index sensor and manufacturing method thereof | |
| Zhu et al. | Propylene carbonate based compact fiber Mach–Zehnder interferometric electric field sensor | |
| CN109596206B (en) | Vibration sensor based on liquid filled photonic crystal fiber | |
| CN103472411A (en) | Magnetic field sensor based on Hybrid long-period fiber grating | |
| CN114137446B (en) | Temperature-sensitive magnetic field eliminating sensing device of FBG cascade optical fiber composite structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |