CN204945215U - Cable current sensor, cable current measuring system and cable - Google Patents
Cable current sensor, cable current measuring system and cable Download PDFInfo
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- CN204945215U CN204945215U CN201520144881.4U CN201520144881U CN204945215U CN 204945215 U CN204945215 U CN 204945215U CN 201520144881 U CN201520144881 U CN 201520144881U CN 204945215 U CN204945215 U CN 204945215U
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Abstract
The utility model discloses a kind of cable current sensor, comprising: conductor wire core (21); Along the fiber unit (25) that the length direction of described conductor wire core (21) extends; And, light sensing unit (23), described smooth sensing unit comprises the Transmission Fibers (231) that the length direction along conductor wire core extends and the sensing element (232) be arranged in Transmission Fibers; And, the separation layer that described conductor wire core (21) and described smooth sensing unit (23) are kept apart and the separation layer that described fiber unit (25) and described conductor wire core (21) are kept apart.Correspondingly, the invention also discloses the cable with light sensing unit and cable current measuring system.
Description
Technical field
The utility model relates to field of photoelectric technology, more specifically, relates to a kind of cable current sensor, a kind ofly has the cable of light sensing unit and a kind of cable current measuring system.
Background technology
The plain conductor of traditional cable has the ability of electric energy transmitting.Plain conductor and optical fiber organically combine by optical cable (Opticalpowercable), have the ability of electric energy transmitting and light signal, namely while electric energy transmitting, and can transmission information.
At present, what extensively adopt the measurement of cable or wire current is electromagnetic current transducer, it is made based on electromagnetic induction principle, along with electric pressure improve constantly, capacity constantly increases, in big current, high voltage, superpower environment, there is magnetic saturation, hysteresis effect, ferromagnetic resonance, inflammable and explosive and volume is large, weight is large, insulation system is complicated, high in cost of production defect.
The features such as volume is little, quality is light owing to having for optical fiber, flexible, electromagnetism interference, radiation resistance are good are applied in sensory field.One is all-fiber current transformator, and it is independently relative to tested wire.Sensing fiber ring is arranged on tested wire, utilizes the electric current in Faraday magnetooptical effect measurement electrified wire.Because fiber core physical dimension and the asymmetric inherent linear birefrigence that causes of internal stress and the external linear birefrigence that causes due to fibre-optical bending or pressurized etc. can cause mutual inductor to the susceptibility of environment temperature and mechanical vibration, thus the sensitivity reduced current measurement and accuracy, and the total of mutual inductor is complicated.
Utility model content
The technical problems to be solved in the utility model is the stability improving cable or electric overhead line current measurement.
According to one side of the present utility model, provide a kind of cable current sensor, comprising:
Conductor wire core;
Light sensing unit, described smooth sensing unit comprises the length direction Transmission Fibers extended and the sensing element be arranged in Transmission Fibers along conductor wire core;
By the separation layer that described conductor wire core and described smooth sensing unit are kept apart.
In an alternative embodiment, described cable current sensor also comprises: the fiber unit that the length direction along described conductor wire core extends; And, by the separation layer that described fiber unit and described conductor wire core are kept apart.
In an alternative embodiment, described separation layer is insulation course.
In an alternative embodiment, described cable current sensor also comprises sheath, in conductor wire core, light sensing unit and insulation course are encapsulated in by described sheath, or, in conductor wire core, light sensing unit, fiber unit and insulation course are encapsulated in.
In an alternative embodiment, described cable current sensor also comprises sheath, and in conductor wire core and insulation course or conductor wire core, insulation course and fiber unit are encapsulated in by described sheath, described smooth sensing unit is arranged on the outside of described sheath.
In an alternative embodiment, described separation layer has been the sheath of insulating effect, and in described conductor wire core and described fiber unit are encapsulated in by described sheath, described smooth sensing unit is arranged on the outside of described sheath.
In an alternative embodiment, described cable current sensor also comprises: the fiber unit that the length direction along described conductor wire core extends, and described smooth sensing unit sensing element to be arranged in the Transmission Fibers of described fiber unit thus to form light sensing unit; And described conductor wire core and described fiber unit are kept apart by described separation layer.
In an alternative embodiment, at least one end in the two ends of described conductor wire core is provided with the connector connecting tested cable or tested wire.
In an alternative embodiment, described sensing element is connected between two sections of Transmission Fibers; The structure of described sensing element comprises one of following:
Magnetic fluid is filled in the optical fiber in the airport of photonic crystal fiber;
Optical fiber or fiber grating are set with kapillary or hollow kapillary outward, between kapillary and optical fiber or fiber grating or in hollow kapillary, fill magnetic fluid, and the two ends of kapillary are with glue package; Or,
There is the sensing element of magnetostriction materials and optical fiber or fiber grating.
In an alternative embodiment, light sensing unit comprises: Transmission Fibers, sensing element, the magnet arranged near sensing element.
Compared to traditional electromagnetic current transducer, the cable current sensor construction of the utility model embodiment is simple, volume is little, lightweight, good insulating, cost are low; And stable performance, affect less by factors such as ambient temperature, vibration, strains, thus can improve the stability of current measurement, sensitivity and accuracy.
According to another aspect of the present utility model, additionally provide a kind of cable current measuring system.This cable current measuring system comprises: the cable current sensor of each embodiment description above, light source, optical pickup apparatus, and signal processing apparatus;
The conductor wire core of cable current sensor is connected with tested cable or tested wire;
Described light source is connected to the Transmission Fibers being positioned at sensing element side of described smooth sensing unit, and described optical pickup apparatus is connected to the Transmission Fibers of the opposite side being positioned at sensing element;
The light signal that described light source sends by the Transmission Fibers of the opposite side of sensing element, is received by optical pickup apparatus after Transmission Fibers and sensing element;
Described optical pickup apparatus sends described signal processing apparatus to by after the sense light signal received;
Described signal processing apparatus is for recording according to received sense light signal the electric current that tested cable or electric wire flow through.
In an alternative embodiment, described signal processing apparatus obtains the magnetic induction density at described smooth sensing unit place according to received sense light signal; With
To be obtained the electric current on tested cable or electric wire by following formulae discovery according to described magnetic induction density:
Wherein, L is with the axis of conductor wire core for the center of circle, the closed circuit that the distance r of light sensing unit and conductor wire core axis is formed as radius; μ
0be 4 π * 10
-7; B represents the magnetic induction density at light sensing unit place; I
ibe the electric current of a conductor wire core 11, i=1,2 ..., n.
The cable current measuring system of the utility model embodiment can be used for measuring the electric current that cable or electric wire flow through, because cable current sensor has sound construction, stable performance, therefore affect less feature by factors such as ambient temperature, vibration, strains, thus can improve the stability of current measurement, sensitivity and accuracy.
According to another aspect of the present utility model, additionally provide a kind of cable, comprising:
Conductor wire core;
Along the one or more smooth sensing unit that the length direction of conductor wire core is arranged, described smooth sensing unit comprises the length direction Transmission Fibers extended and the sensing element be arranged in Transmission Fibers along conductor wire core;
By the separation layer that described conductor wire core and described smooth sensing unit are kept apart; And,
Described conductor wire core, described smooth sensing unit and described insulation course are encapsulated in inner cable sheath.
In an alternative embodiment, described cable also comprises: the fiber unit that edge and the length direction of described conductor wire core extend; And, by the separation layer that described fiber unit and described conductor wire core are kept apart.
In an alternative embodiment, the length direction along conductor wire core arranges light sensing unit in the current measurement position of pre-determining.
The cable of the utility model embodiment is by arranging light sensing unit in inside simultaneously, make the electric current that this light sensing unit measurement cable self can be utilized to flow through, such cable has possessed delivery of electrical energy simultaneously and has measured the ability of electric current, or, the ability of delivery of electrical energy, information transmission and measurement electric current.
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 shows the structural representation of the cable current sensor according to the utility model first embodiment.
Fig. 2 shows the structural representation of the light sensing unit according to the utility model one embodiment.
Fig. 3 shows the structural representation of the cable current sensor according to the utility model second embodiment.
Fig. 4 shows the structural representation of the cable current sensor according to the utility model the 3rd embodiment.
Fig. 5 shows the structural representation of the cable current sensor according to the utility model the 4th embodiment.
Fig. 6 shows the structural representation of the cable current measuring system according to the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
In disclosure file, term " cable " refers to the cable of the optical cable comprising traditional cable and have optical fiber.
Fig. 1 shows the structural representation of the cable current sensor according to the utility model first embodiment.As shown in Figure 1, this cable current sensor comprises: conductor wire core 11; Insulation course 12; Light sensing unit 13; Sheath 14.In conductor wire core 11, insulation course 12 and light sensing unit 13 are encapsulated in by sheath 14.It should be noted that, conductor wire core 11 can be one or more conductor wire core.
In the embodiment show in figure 1, insulation course 12 is provided with between conductor wire core 11 and light sensing unit 13; Also insulation course 12 is provided with between sheath 14 and conductor wire core 11 and between sheath 14 and light sensing unit 13.But, it will be appreciated by those skilled in the art that all or part of of these insulation courses is not required.
Light sensing unit 13 can comprise Transmission Fibers 131 and sensing element 132.Such as, can be that sensing element 132 is connected between two sections of Transmission Fibers 131.
Sensing element 132 can be the unitized construction of optical fiber (comprising special optical fiber) and magnetic fluid.Magnetic fluid is a kind ofly scattered in certain carrier fluid the stable colloidal solution formed by surfactant high uniformity by nano level ferromagnetism particle, and it is made up of jointly nano-sized magnetic particles, surfactant and carrier fluid.Conventional magnetic-particle has metal oxide (Fe
3o
4) and ferrite (CoFe
2o
4, MnZnFeO
4), metal (Fe, Co, Ni and alloy thereof) or ferromagnetism nitrided iron [Fe
xn (2<X<8)] etc.; Conventional carrier fluid has hydro carbons, ester class, polyphenyl ethers, fluorocarbons class, silicone oil, liquid metal (mercury, gallium), water, kerosene etc.
In an embodiment, magnetic fluid is filled in the airport of photonic crystal fiber.In another embodiment, sensing element 132 can be set with kapillary outside such as treated optical fiber (as: part of clad of corrosion optical fiber), fiber grating, micro-nano fiber, thin-core fibers or coreless fiber etc., or hollow kapillary, between kapillary and optical fiber or fiber grating or in hollow kapillary, fill magnetic fluid, the two ends of kapillary are with glue package.
In the utility model embodiment, sensing element 132 can also be the sensing unit with magnetostriction materials and optical fiber or fiber grating.Magnetostriction materials can be the such as traditional material such as copper conductor, nickel alloy or the new material such as Terfenol-D rare earth alloy, TbDyFe alloy, optical fiber or fiber grating are wound around or are pasted onto on magnetostriction materials, can also be the optical fiber or the fiber grating that are formed with magneto strictive material on the surface.
Fig. 2 shows the structural representation of the light sensing unit according to the utility model one embodiment.As shown in Figure 2, this light sensing unit 13 comprises: Transmission Fibers 131, sensing element 132, be arranged on magnet 15 near sensing element 132.Produce a constant magnetic field by magnet 15, make light sensing unit be operated in demand measurement range and linear work district, the magnetic field that in cable, electric current produces and the magnetic field that magnet produces superimposed, in the linear zone of sensing element, carry out current measurement.
When the cable current sensor application of Fig. 1 is in time measuring cable or wire current, the conductor wire core of the conductor wire core 11 of this cable current sensor with tested cable or electric wire can be connected.Such as, can be that the conductor wire core 11 of cable current sensor is connected between two velamens survey cables or electric wire, or one end of the conductor wire core 11 of cable current sensor be connected with the conductor wire core of tested cable or electric wire.The Transmission Fibers 131 being positioned at sensing element 132 side of cable current sensor is connected to light source, and its Transmission Fibers being positioned at sensing element 132 opposite side is connected to optical pickup apparatus, as shown in Fig. 4 below and describe.The electric current of tested like this cable or wire transfer will flow through the conductor wire core 11 of cable current sensor.The electric current of tested cable or electric wire will be recorded by following formula based on Ampère circuital theorem:
formula 1
Wherein, L is with the axis of conductor wire core 11 for the center of circle, the closed circuit that light sensing unit 13 is formed as radius with the distance r of conductor wire core 11 axis; μ
0value 4 π * 10
-7; B is the magnetic induction density at light sensing unit 13 place; I
ibe the electric current of a conductor wire core 11, i=1,2 ..., n.
Fig. 3 shows the structural representation of the cable current sensor according to the utility model second embodiment.Similar with the embodiment shown in Fig. 1, the cable current sensor shown in Fig. 3 comprises conductor wire core 11; Insulation course 12; Light sensing unit 13 and sheath 14.But in this embodiment, light sensing unit 13 is arranged on outside sheath 14.
Fig. 4 shows the structural representation of the cable current sensor according to the utility model the 3rd embodiment.As shown in Figure 4, this cable current sensor comprises: conductor wire core 21; Insulation course 22; Light sensing unit 23; Sheath 24; Fiber unit 25.Conductor wire core 21 electric energy transmitting, fiber unit 25 transmission information.Light sensing unit 23 measures the electric current in optical cable.Insulation course 22 is provided with between conductor wire core 21 and fiber unit 25, between conductor wire core 21 and light sensing unit 23.Alternatively, also insulation course is provided with between sheath 24 and light sensing unit 23 and between sheath 24 and fiber unit 25.Light sensing unit 23 comprises Transmission Fibers 231 and sensing element 232, and sensing element 232 is arranged between two sections of Transmission Fibers 231.In the fig. 4 embodiment, light sensing unit 23 is arranged in sheath 24, and near conductor wire core 21 but away from fiber unit 25.In another embodiment, light sensing unit 23 can be arranged on outside sheath 24.Alternatively or in addition, light sensing unit 23 can be set between conductor wire core 21 and fiber unit 25; Or light sensing unit 23 can be set near fiber unit 25 but away from conductor wire core 21.
During use, the conductor wire core 21 of this cable current sensor can be connected with the conductor wire core of tested cable or electric wire.If tested cable has Transmission Fibers, then the fiber unit of cable current sensor can be connected with the Transmission Fibers of tested cable.
In the utility model embodiment, can also be that sensing element 232 is set in fiber unit 25, thus fiber unit 25 itself also form a light sensing unit 23.Or, there are in fiber unit 25 many Transmission Fibers, a Transmission Fibers wherein arrange sensing element thus forms light sensing unit.
Fig. 5 shows the structural representation of the cable current sensor according to the utility model the 4th embodiment.Similar with the embodiment shown in Fig. 4, the cable current sensor shown in Fig. 5 comprises conductor wire core 21, insulation course 22, light sensing unit 23, sheath 24 and fiber unit 25.But in this embodiment, light sensing unit 25 is arranged on outside sheath 24.
The embodiment that light sensing unit shown in Fig. 1, Fig. 3-Fig. 5 is arranged in parallel along the length direction of conductor wire core, but also can be light sensing unit be wrapped on conductor wire core along the length direction of conductor wire core.
Above-described be according to the utility model embodiment independent of transmission cable exist cable current sensor.Correspondingly, the utility model embodiment still provides the cable with light sensing unit.Such as, one or more light sensing unit as shown in Figure 1 can be set along the length direction of the conductor wire core of traditional cable or optical cable.Alternatively, can be that light sensing unit is set in the current measurement position of the pre-determining of cable.
Light sensing unit can be used for the electric current of the conductor wire core measured in traditional cable or optical cable, thus makes a traditional cable or optical cable possess delivery of electrical energy, information transmission simultaneously, and measures the ability of electric current.
Cable according to the utility model embodiment while electric energy transmitting or electric energy transmitting and information, can be measured the electric current of cable.Light sensing unit is arranged on the integral structure of cable inside, sound construction, stable performance, therefore affects less by factors such as ambient temperature, vibration, strains, can improve the stability of current measurement, sensitivity and accuracy.In addition, this cable and current sensor integrated design structure is simple, volume is little, lightweight, good insulating, cost are low, and be applicable in the rugged surroundings such as inflammable and explosive, space very critical.
Fig. 6 shows the structural representation of the cable current measuring system according to the utility model embodiment.As shown in Figure 6, this cable current measuring system signal processing apparatus 7 of comprising the cable current sensor gone out as shown in Figure 4, the light source 5 be connected with the Transmission Fibers 231 being positioned at sensing element 232 side of cable current sensor, the optical pickup apparatus 6 be connected with the Transmission Fibers 232 of the opposite side being positioned at sensing element 232 and being connected with optical pickup apparatus 6.During measurement, the conductor wire core of cable current sensor is connected with tested cable or tested wire.The light signal that light source 5 sends by the opposite side Transmission Fibers 231 of sensing element 232, receives sense light signal by optical pickup apparatus 6 after Transmission Fibers 231 and sensing element 232.Light source 5 can be LASER Light Source or LED light source.Optical pickup apparatus 6 can be the pick-up unit of light intensity, wavelength, frequency or polarization state.The sense light signal that signal processing apparatus 7 can receive based on optical pickup apparatus 6 obtains the magnetic induction density at light sensing unit place, and according to the electric current that the wire core upper reaches that above-mentioned formula 1 can calculate in cable or electric wire is crossed.Signal processing apparatus 7 can comprise photoelectric conversion module, data acquisition memory module, data processing module etc.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (15)
1. a cable current sensor, comprising:
Conductor wire core (11,21);
Light sensing unit (13,23), described smooth sensing unit (13,23) comprises the Transmission Fibers (131,231) that the length direction along conductor wire core extends and the sensing element (132,232) be arranged in Transmission Fibers (131,231), and described sensing element is the unitized construction of optical fiber and magnetic fluid or has the sensing element of magnetostriction materials and optical fiber or fiber grating;
By the separation layer that described conductor wire core (11,21) and described smooth sensing unit (13,23) are kept apart.
2. cable current sensor according to claim 1, is characterized in that, described cable current sensor also comprises:
Along the fiber unit (25) that the length direction of described conductor wire core (21) extends; And,
By the separation layer that described fiber unit (25) and described conductor wire core (21) are kept apart.
3. cable current sensor according to claim 1 and 2, is characterized in that, described separation layer is insulation course (12,22).
4. cable current sensor according to claim 3, is characterized in that, described cable current sensor also comprises sheath (14,24), wherein:
In conductor wire core (11), light sensing unit (13) and insulation course (12) are encapsulated in by described sheath (14,24), or, in conductor wire core (21), light sensing unit (23), fiber unit (25) and insulation course (22) are encapsulated in; Or,
In conductor wire core (11) and insulation course (12) or conductor wire core (21), insulation course (22) and fiber unit (25) are encapsulated in by described sheath (14), described smooth sensing unit (13,23) is arranged on the outside of described sheath (14,24).
5. cable current sensor according to claim 1 and 2, it is characterized in that, described separation layer has been the sheath of insulating effect, and in described conductor wire core and described fiber unit are encapsulated in by described sheath, described smooth sensing unit is arranged on the outside of described sheath.
6. cable current sensor according to claim 1, is characterized in that, described cable current sensor also comprises:
Along the fiber unit (25) that the length direction of described conductor wire core (21) extends, described smooth sensing unit (23) is arranged in described fiber unit (25);
Described conductor wire core (21) and described fiber unit (25) are kept apart by described separation layer.
7. cable current sensor according to claim 1, is characterized in that, at least one end in the two ends of described conductor wire core (11,21) is provided with the connector connecting tested cable or tested wire.
8. cable current sensor according to claim 1 and 2, is characterized in that, described sensing element is connected between two sections of Transmission Fibers; Described sensing element is the unitized construction of optical fiber and magnetic fluid, and the unitized construction of described optical fiber and magnetic fluid comprises one of following:
Magnetic fluid is filled in the optical fiber in the airport of photonic crystal fiber;
Optical fiber or fiber grating are set with kapillary or hollow kapillary outward, between kapillary and optical fiber or fiber grating or in hollow kapillary, fill magnetic fluid, and the two ends of kapillary are with glue package.
9. cable current sensor according to claim 1 and 2, it is characterized in that, light sensing unit (13) comprising: Transmission Fibers (131), sensing element (132), be arranged on magnet (15) near sensing element.
10. a cable current measuring system, comprising: the cable current sensor described in claim 1 or 2, light source (5), optical pickup apparatus (6), and signal processing apparatus (7);
The conductor wire core of described cable current sensor is used for being connected with tested cable or tested wire;
Described light source (5) is connected to the Transmission Fibers (131,231) being positioned at sensing element (132,232) side of described smooth sensing unit (13,23), and described optical pickup apparatus (6) is connected to the Transmission Fibers (131,231) of the opposite side being positioned at sensing element (132,232);
The light signal that described light source (5) sends by the Transmission Fibers (131,231) of the opposite side of sensing element (132,232), is received by optical pickup apparatus (6) after Transmission Fibers (131,231) and sensing element (132,232);
Described optical pickup apparatus (6) sends described signal processing apparatus (7) to by after the sense light signal received;
Described signal processing apparatus (7) is for recording according to received sense light signal the electric current that tested cable or electric wire flow through.
11. measuring systems according to claim 10, is characterized in that, described signal processing apparatus (7) records according to received sense light signal the electric current that tested cable or electric wire flow through, and comprising:
Described signal processing apparatus (7) obtains the magnetic induction density at described smooth sensing unit place according to received sense light signal; With
Obtained the electric current of tested cable or electric wire by following formulae discovery according to described magnetic induction density:
Wherein, L is with the axis of conductor wire core for the center of circle, the closed circuit that the distance r of light sensing unit and conductor wire core axis is formed as radius; μ
0be 4 π * 10
-7 ;b represents the magnetic induction density at light sensing unit place; Dl is the line integral of closed circuit L; I
ibe the electric current of a conductor wire core 11, i=1,2 ..., n.
12. 1 kinds of cables, comprising:
Conductor wire core;
Along the one or more smooth sensing unit that the length direction of conductor wire core is arranged, described smooth sensing unit comprises the Transmission Fibers that the length direction along conductor wire core extends and the sensing element be arranged in Transmission Fibers, and described sensing element is the unitized construction of optical fiber and magnetic fluid or has the sensing unit of magnetostriction materials and optical fiber or fiber grating;
By the separation layer that described conductor wire core and described smooth sensing unit are kept apart; And,
Described conductor wire core, described smooth sensing unit and insulation course are encapsulated in inner cable sheath.
13. cables according to claim 12, is characterized in that, described cable also comprises:
Along the fiber unit that the length direction of described conductor wire core extends; And,
By the separation layer that described fiber unit and described conductor wire core are kept apart.
14. cables according to claim 12 or 13, it is characterized in that, the length direction along conductor wire core arranges a light sensing unit at the measurement Current Position place of pre-determining.
15. cables according to claim 13, is characterized in that, described smooth sensing unit is arranged in described fiber unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144881.4U CN204945215U (en) | 2015-03-13 | 2015-03-13 | Cable current sensor, cable current measuring system and cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144881.4U CN204945215U (en) | 2015-03-13 | 2015-03-13 | Cable current sensor, cable current measuring system and cable |
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|---|---|
| CN204945215U true CN204945215U (en) | 2016-01-06 |
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| CN201520144881.4U Expired - Fee Related CN204945215U (en) | 2015-03-13 | 2015-03-13 | Cable current sensor, cable current measuring system and cable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911328A (en) * | 2016-06-06 | 2016-08-31 | 哈尔滨理工大学 | Current sensor based on magnetism-guided loop and magnetic fluid |
| WO2017165265A1 (en) * | 2016-03-23 | 2017-09-28 | University Of Pittsburgh-Of The Commonwealth System Of Higher Education | Optical fiber based sensing for smart electrical cables and distributed radiation detection |
| CN114137446A (en) * | 2021-11-30 | 2022-03-04 | 哈尔滨理工大学 | Temperature sensitive magnetic field eliminating sensing device of FBG (fiber Bragg Grating) cascade optical fiber composite structure |
-
2015
- 2015-03-13 CN CN201520144881.4U patent/CN204945215U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017165265A1 (en) * | 2016-03-23 | 2017-09-28 | University Of Pittsburgh-Of The Commonwealth System Of Higher Education | Optical fiber based sensing for smart electrical cables and distributed radiation detection |
| US10902976B2 (en) | 2016-03-23 | 2021-01-26 | University of Pittsburgh—of the Commonwealth System of Higher Education | Optical fiber based sensing for smart electrical cables and distributed radiation detection |
| CN105911328A (en) * | 2016-06-06 | 2016-08-31 | 哈尔滨理工大学 | Current sensor based on magnetism-guided loop and magnetic fluid |
| CN114137446A (en) * | 2021-11-30 | 2022-03-04 | 哈尔滨理工大学 | Temperature sensitive magnetic field eliminating sensing device of FBG (fiber Bragg Grating) cascade optical fiber composite structure |
| CN114137446B (en) * | 2021-11-30 | 2023-12-22 | 哈尔滨理工大学 | Temperature-sensitive magnetic field eliminating sensing device of FBG cascade optical fiber composite structure |
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