CN103616651A - On-site verification apparatus for optical fiber current sensor - Google Patents
On-site verification apparatus for optical fiber current sensor Download PDFInfo
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Abstract
The invention relates to an on-site verification apparatus for an optical fiber current sensor, a usage method of the on-site verification apparatus and application of the on-site verification apparatus. The on-site verification apparatus for the optical fiber current sensor includes an optical fiber current detection sensing module and an optical fiber current detection processing and display module. The optical fiber current detection sensing module is composed of a light source, a linear polariscope, a polarization separator, a modulator, a transmission optical fiber, a 1/4 wavelength filter, an optical fiber sensing head, a reflector and a photoelectric detector. Proceeding from installation and debugging of the optical fiber current detection sensing module, the optical fiber current sensor on-site verification apparatus has reasonable control steps, is easy to operate, and can carry out efficient, economic and accurate error detection and quantity transmission on a DC heavy current sensor working on site for a long time; the optical fiber current sensor on-site verification apparatus is suitable for detecting and verifying a current detection sensor working on site for a long time in fields of electrolytic aluminum, electrolytic copper, electric smelting, electroplate and other electrochemical engineering; the on-site verification apparatus for the optical fiber current sensor is good in safety performance, large in measuring dynamic scope, high in frequency response degree, small in size and light in weight; and by adopting the on-site verification apparatus for the optical fiber current sensor, the measuring precision of a current detection apparatus can be raised, and needs of safety and stabilization of a power supply system are met.
Description
Technical field
The invention belongs to optical instrument and measure electric variable technical field, relate to a kind of device and using method and application that adopts light modulating method to measure electric current, relate in particular to a kind of current detection sensor to on-the-spot long-term work and enter accommodating ﹑ error-detecting and transmission of quantity value are used exactly fibre optic current sensor on-site calibration device and using method and application.
Background technology
In the electrolysis industries such as chemical industry or non-ferrous metal, DC high-current sensor is widely used, and it has played the effect that the D.C. high-current in production run is measured and controlled.Because the production technology of affiliated industry has chronicity and successional feature, so using scene, due to Wen Du ﹑ Shi Jian ﹑ position, and the impact of the factors such as external magnetic field, make the overproof problem of a lot of DC high-current sensor ubiquity accuracy, and because the metering of D.C. high-current value and the accuracy of control and degree of stability all have a direct impact producing She Bei ﹑ Ren person's An full ﹑ operating procedure and production efficiency, so the current detection sensor of long-term work is at the scene entered to the error-detecting accurately of accommodating fast prompt ﹑ economy and transmission of quantity value is necessary.
Adopt of traditional direct current detection sensor be take electromagnetic induction principle as basic current transformer and Hall detecting type pick-up unit more, its volume more greatly and heavier, cause transportation and on-the-spot installation difficulty to increase, in addition, it is subject to outer magnetic interference larger, causes accuracy of detection poor, and its difference need to lean on verification people to read, personal error is increased, be difficult to accurately reflect legitimate reading numerical value.
At present, fibre optic current sensor based on Faraday effect is larger with its measurement range, and precision is higher, be widely used in current measurement, this fibre optic current sensor mainly utilize Ampere circuit law and and Faraday magnetooptical effect measure the electric current of conductor, it is according to Ampere circuit law, alive conductor can produce closed magnetic field around, and the two bundle polarized lights of propagating in sensor fibre can produce phase differential under the effect in magnetic field, then utilize interferometry to go out this phase differential, thereby obtain the size of the current value corresponding with magnetic field.Sensor fibre in this fibre optic current sensor is generally arranged in the annular metal structure of sealing in advance, sensor fibre is wound in the outer of metal structure or the archimedean spiral groove of side, after the first coiling success of sensor fibre, with silica gel, fill fixing, curvature, the placement path of sensor fibre are fixed, and this sensor fibre is fixed on the non-removable structure on closed ring texture body in advance.When measuring the current value of conductor, closed ring texture body need to be set on Ampereconductors, now can only first Ampereconductors be disconnected, after then closed ring texture body being inserted in, then Ampereconductors is connected.Yet, the diameter of the high-current conductor using at metallurgy or chemical field generally can reach more than 1 meter, be difficult to disconnect easily, as can be seen here, existing this fibre optic current sensor is because can not carry out at the scene opening installation, so its application in above-mentioned field is subject to great restriction.
In addition, its technical scheme mainly adopting of current modulator is all that modulation signal and closed signal are superimposed substantially, like this due to the cross-linked reason of ultra-weak electronic signal, will there are some latch-up problem that for example DC low current is measured, to this, common solution is increase electric signal shake or carry out Stochastic Modulation, but this solution can only reduce latch-up phenomenon, but can not fundamentally to it, eliminate, therefore cause whole measuring accuracy to be difficult to reach 0.05%.
Application number is 201010150176.7, application publication number is CN102213729A, the Chinese invention patent application that name is called " fibre optic current sensor device and optical fiber current sensing system " discloses a kind of optical fiber current sensing device that comprises sensor fibre and support, a kind of photodetector that comprises is also disclosed simultaneously, signal processing unit, and the light source being linked in sequence, y-shaped waveguide, 45 ° of fusion points, slab waveguide modulator, the optical fiber current sensing system of polarization maintaining optical fibre and described optical fiber current sensing device, for the electric current by conductor is measured, although it can realize current detecting and control that on-the-spot opening installs to solve working site, but what because of it, adopt is the optical fiber technology of the interferometric method of shunt modulation, so its measurement result is easy to and is subject to a great extent the restriction of modulation technique level along separate routes, also can be subject to the impact of its various its errors of optical parametric of each element of optical interference circuit simultaneously, optical interference circuit due to modulation along separate routes itself is subject to site environment temperature in addition, time, the impact of the factors such as position and external magnetic field is larger, so same problem that the overproof situation of accuracy easily occurs that exists of its current detection sensor.
Application number is 200710041685.4, application publication number is CN101320055A, the Chinese invention patent application that name is called " all-fiber current sensor " discloses and has comprised light source, 3X3 polarization-maintaining fiber coupler, fibre optic polarizer, the all-fiber current sensor of 1/4 optical-fibre wave plate and sensing fiber ring, although it can be in the situation that do not add extra phase bias device, by adopting 3X3 polarization-maintaining fiber coupler that comparatively stable Sagnac optical interference circuit is provided, but because its same employing is the optical fiber technology of interferometric method, so its measurement result is easy to and is subject to a great extent the restriction of modulation technique level along separate routes equally, also can be subject to equally the impact of its various its errors of optical parametric of each element of optical interference circuit simultaneously, optical interference circuit due to modulation along separate routes itself is subject to site environment temperature equally in addition, time, the impact of the factors such as position and external magnetic field is larger, so same problem that the overproof situation of accuracy easily occurs that exists of its current detection sensor.
On the whole, in the electrolysis industries such as more existing chemical industry or non-ferrous metal, the current detecting of the DC high-current sensor of its working site and control device, majority is to adopt to take electromagnetic induction principle as basic current transformer, Hall detecting type pick-up unit, fibre optic current sensor based on Faraday effect, by utilizing interferometry to go out this phase differential, thereby obtain the size of the current value corresponding with magnetic field, its measurement result is easy to and is subject to a great extent the restriction of modulation technique level along separate routes, also can be subject to the impact of its various its errors of optical parametric of each element of optical interference circuit simultaneously, optical interference circuit due to modulation along separate routes itself is subject to site environment temperature in addition, time, the impact of the factors such as position and external magnetic field is larger, so there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, in addition, existing modulator is the modes that adopt modulation signal and closed signal to be superimposed again more, thereby due to the cross-linked reason of ultra-weak electronic signal, there are some " locking " problems that for example DC low current is measured, and can only reduce " locking " phenomenon by the method that increases electric signal shake or carry out Stochastic Modulation, but can not fundamentally to it, eliminate, therefore cause equally whole measuring accuracy to be difficult to reach 0.05%, prior art is all difficult to meet the requirement of described industry field to its long-time stability of current sensing means, reliability and security, thereby causes the safe operation of electric power system and stable operation to affect adversely.
Summary of the invention
The object of the present invention is to provide a kind of fibre optic current sensor on-site calibration device, to solve in the electrolysis industries such as described chemical industry or non-ferrous metal, there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, especially at the scene in the situation of long-term operation, the ubiquitous site environment temperature that is subject to of existing current sensing means, time, the impact of the factors such as position and external magnetic field is larger, its long-time stability, the index such as reliability and security is difficult to meet the problem of industry requirement, solve the latch-up problem that for example DC low current that existing modulator causes due to ultra-weak electronic signal cross-couplings is measured simultaneously, and can only reduce latch-up phenomenon by the method that increases electric signal shake or carry out Stochastic Modulation, but can not fundamentally to it, eliminate, thereby cause whole measuring accuracy to be difficult to reach 0.05% problem, realization is carried out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value to the DC high-current sensor of on-the-spot long-term work, improve the measuring accuracy of current sensing means, reduce its volume, improve its degree easy for installation, meet the needs of safe operation and the stable operation of electric power system.
For achieving the above object, the invention provides a kind of fibre optic current sensor on-site calibration device, comprise that the fibre-optic current being connected detects sensing module and fibre-optic current Check processing and display module, described fibre-optic current detects after sensing module employing is modulated reference light and compares and process the closed loop control mode that draws check results with detected signal again.
Described fibre optic current sensor on-site calibration device, preferably, described fibre-optic current detects sensing module and comprises that fibre-optic current detects sensing module and fibre-optic current Check processing and display module, is characterized in that: described fibre-optic current detects sensing module and is comprised of light source, linear polarizer, polarization separator, modulator, Transmission Fibers, 1/4 wavelength filter, optical fiber sensor head, catoptron and photodetector, described optical fiber sensor head with by check sensor, be centered around on same busbar, described light source is connected with modulator with polarization separator by linear polarizer, described modulator is connected with Transmission Fibers again, described Transmission Fibers is connected with 1/4 wavelength filter again, described 1/4 wavelength filter is connected with optical fiber sensor head again, and described optical fiber sensor head is connected with scintilloscope again, described light source is also connected with photodetector, and described photodetector is connected with fibre-optic current Check processing and display module again, described fibre-optic current Check processing and display module are connected again with by check sensor, the light that described light source sends is reached linear polarizer, after polarization separator, reached modulator, modulator recording wavelength reaches Transmission Fibers, Transmission Fibers reaches 1/4 wavelength filter by light signal, 1/4 wavelength filter makes light signal generating right-handed polarized light and left-hand polarization light and reaches the optical fiber sensor head around busbar, after the optical fiber sensor head transmission around busbar, be subject to monitoring current magnetic field wave phase change and reach catoptron, now light signal is reflected mirror and reflects back, and successively through 1/4 wavelength filter, Transmission Fibers and modulator arrive photodetector, photodetector and electron device detect the phase drift of light wave, the phase drift of described light wave is directly proportional to the electric current of wire, after the conversion of light/electricity, the digital signal of gained current values reaches fibre-optic current Check processing module, and described fibre-optic current Check processing and display module compare above-mentioned digital signal to process by verification software with the simulating signal of being transmitted by check sensor and draw check results.
Fibre optic current sensor on-site calibration device as above, preferably, the modulation signal of described modulator separates with closed signal, is applied to respectively on two arms of modulator.
In above-mentioned arbitrary scheme, preferably, described optical fiber sensor head adopts a sensor fibre that diameter is 4mm
More preferably, described sensor fibre adopts single-mode fiber or circular birefringent fiber or low birefringent fiber or annealing optical fiber, and described sensor fibre comprises optical fiber and is enclosed within its outer flexible protective layer; Described flexible protective layer adopts the sleeve pipe of being made by quartz material; Between described optical fiber and flexible protective layer, be filled with lubricant.
In above-mentioned any scheme, preferably, described fibre-optic current detects sensing module and is provided with support, and is fixed on busbar by support; That described support adopts is light, insulation and non-magnetic material are made; Described support is fixedly installed on base or is fixedly installed on the crossbeam of the upper and lower both sides of described conductor bus; Described support is provided with optical fiber duct, and described optical fiber sensor head is placed in optical fiber duct; Described optical fiber sensor head is rack-mount fixing around original position; Described support comprises first and the second portion all with optical fiber duct, described first and second portion removably connect into the closed hoop structure around described conductor bus one circle, the optical fiber duct of described first and the optical fiber duct of described second portion are combined into closed hoop, for placing described optical fiber sensor head; Or the first of described support is U-shaped structure, this U-shaped structure is connected and forms with two corner arms by three direct-connected arms all with optical fiber duct; The second portion of described support is connected and forms with a direct-connected arm by two corner arms all with optical fiber duct; Each corner arm of described second portion is all connected with a direct-connected arm of described first, and described first and second portion connect into described closed hoop structure.
In above-mentioned any scheme, preferably, described Transmission Fibers and optical fiber sensor head are fixed connection structure; Described Transmission Fibers is arranged in control box; Described fibre-optic current Check processing and display module adopt computer; Described fibre-optic current Check processing and display module are also connected with printer; The light signal that light source sends is to reach linear polarizer by waveguide; Described light source adopts SLD light source or LED light source, and described phase-modulator adopts PZT modulator or electrooptic modulator or integrated optical modulator, and described 1/4 wavelength filter adopts full optical-fibre wave plate; Described light source, linear polarizer, polarization separator, modulator, Transmission Fibers, 1/4 wavelength filter, around adopting full optical fiber to connect between busbar optical fiber, catoptron and photodetector; Described fibre-optic current detects sensing module and also comprises temperature sensor; Described temperature sensor is arranged on described support, to detect described fibre-optic current, detects the temperature of sensing module and this temperature signal is reached to described fibre-optic current Check processing and display module.
Another object of the present invention is, a kind of using method of fibre optic current sensor on-site calibration device is provided, method can be installed in working site quickly and easily thus, debug and use described fibre optic current sensor on-site calibration device, to solve in the electrolysis industries such as described chemical industry or non-ferrous metal, there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, especially at the scene in the situation of long-term operation, the ubiquitous site environment temperature that is subject to of existing current sensing means, time, the impact of the factors such as position and external magnetic field is larger, its long-time stability, the index such as reliability and security is difficult to meet the problem of industry requirement, realization is carried out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value to the DC high-current sensor of on-the-spot long-term work, improve the measuring accuracy of current sensing means, improve its degree easy for installation, meet the needs of safe operation and the stable operation of electric power system.
The using method of fibre optic current sensor on-site calibration device as above, comprises the following steps:
The first step, detects sensing module by fibre-optic current rack-mount, and be fixed on by the busbar of same of check sensor; That described support adopts is light, insulation and non-magnetic material are made;
Second step, fixedly mounts sensor fibre;
The 3rd step, guides to the simulating signal of being exported by check sensor on the corresponding ports of fibre-optic current Check processing and display module;
The 4th step, by fibre-optic current Check processing and display module arrange interface for by the identical range of check sensor, and corresponding ratio output signal;
The 5th step, after setting completes, by determining instruction, automatically get back to Calibration interface, by the electric current that increases or reduce busbar with automatic display measurement position fibre-optic current detect the measured value of sensing module, by the measured value of check sensor, its two difference number percent, squiggle figure, and the temperature and humidity situation of verification while detecting;
The 6th step, when increasing or reducing the electric current of busbar, changes detection check location point and pauses, and repeats above-mentioned the 5th step.
The using method of fibre optic current sensor on-site calibration device as above, preferably, after the 6th step, further comprising the steps of:
The 7th step, prints check results report by printer, and the testing result on described check results report is 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% form of classifying according to difference number percent automatically.
Another object of the present invention is, a kind of application of fibre optic current sensor on-site calibration device is provided, to solve in the electrolysis industries such as described chemical industry or non-ferrous metal, there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, especially at the scene in the situation of long-term operation, existing current sensing means be ubiquitously subject to the impact of the factors such as site environment temperature, time, position and external magnetic field larger, the indexs such as its long-time stability, reliability and security are difficult to meet the problem of industry requirement; Realization is carried out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value to the DC high-current sensor of on-the-spot long-term work, improve the measuring accuracy of current sensing means, improve its degree easy for installation, meet the needs of safe operation and the stable operation of electric power system.
The application of fibre optic current sensor on-site calibration device as above in the detection check of the current detection sensor of electric its on-the-spot long-term work of chemical field of electrolytic aluminium, cathode copper, electric smelting or field of electroplating.
Compared with prior art, the present invention has the following advantages:
The invention provides a kind of fibre optic current sensor on-site calibration device, the technology that it has adopted full optical fiber optical optical road to combine with full digital closed loop control technology in principle, make that measuring accuracy is high, bandwidth and without saturated phenomenon, can Measurement accuracy DC current and higher hamonic wave; And based on Ampere circuit law, avoid closing on the interference in magnetic field, overcome ideally the deficiency of traditional DC current sensor; It take high-precision optical fiber current detecting sensing module as basis, has solved the ubiquitous poor stability of conventional current sensor, is subject to the technical barriers such as temperature, external magnetic field and vibration interference; In current detecting, adopt optical fiber sensing ring structure, make that its size is easy to adjust and mounting means is flexible.
Fibre optic current sensor on-site calibration device provided by the invention, the modulation signal of its modulator separates with closed signal, be applied to respectively on two arms of modulator, thereby because cross-linked signal is fixed, so only can introduce a fixing very little offset signal, and this error can compensate easily by the method in school zero, the latch-up problem of measuring to solve for example DC low current that existing modulator caused due to ultra-weak electronic signal cross-couplings, and can only reduce latch-up phenomenon by the method that increases electric signal shake or carry out Stochastic Modulation, but can not fundamentally to it, eliminate, thereby cause whole measuring accuracy to be difficult to reach 0.05% problem, thereby effectively improve whole detection sensitivity and checking precision.
Fibre optic current sensor on-site calibration device provided by the invention, its optical fiber sensor head around busbar adopts the optical fiber of a diameter 4mm, makes on-the-spot installation not affected by magnetic force, and safety easy for installation, in addition, digital transmission also can reduce transmission error.
Fibre optic current sensor on-site calibration device provided by the invention, its signal transmission adopts total digitalization to process, its signal calibration operation adopts computer to process, and by parameter, be set to same ratio and be related to signal, then by two signals in same coordinate plane compare error value, make testing result data and the curve of each measurement point in measuring process to read and to store in real time, intuitively and easily, and can get form by printer.
The present invention also provides a kind of using method of fibre optic current sensor on-site calibration device, it is from the installment and debugging of fibre-optic current detection sensing module, by control step is rationally set, easy and simple to handle, the DC high-current sensor that can solve on-the-spot long-term work carries out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value problem.
The present invention also provides the application in the detection check of the current detection sensor of long-term work at the scene of a kind of fibre optic current sensor on-site calibration device, especially at electrolytic aluminium, cathode copper, application in the detection check of the current detection sensor of electric smelting or its on-the-spot long-term work of field of electroplating, to solve in the electrolysis industries such as described chemical industry or non-ferrous metal, there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, especially at the scene in the situation of long-term operation, the ubiquitous site environment temperature that is subject to of existing current sensing means, time, the impact of the factors such as position and external magnetic field is larger, its long-time stability, the index such as reliability and security is difficult to meet the problem of industry requirement, realization is carried out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value to the DC high-current sensor of on-the-spot long-term work, improve the measuring accuracy of current sensing means, improve its degree easy for installation, meet the needs of safe operation and the stable operation of electric power system.
On the whole, the invention provides a kind of fibre optic current sensor on-site calibration device and using method and application, solve in the electrolysis industries such as described chemical industry or non-ferrous metal, there is the problem that the overproof situation of accuracy easily occurs in its current detection sensor, especially at the scene in the situation of long-term operation, the ubiquitous site environment temperature that is subject to of existing current sensing means, time, the impact of the factors such as position and external magnetic field is larger, its long-time stability, the index such as reliability and security is difficult to meet the problem of industry requirement, solve the latch-up problem that for example DC low current that existing modulator causes due to ultra-weak electronic signal cross-couplings is measured simultaneously, and can only reduce latch-up phenomenon by the method that increases electric signal shake or carry out Stochastic Modulation, but can not fundamentally to it, eliminate, thereby cause whole measuring accuracy to be difficult to reach 0.05% problem, realization is carried out Kuai Jie ﹑ economy and error-detecting accurately and transmission of quantity value to the DC high-current sensor of on-the-spot long-term work, it has the advantages such as security performance is good, measurement dynamic range is large, frequency response degree is high, volume is little, lightweight, its maximum current measurement range can reach 1000kA, and accuracy can reach 0.01%, can improve the measuring accuracy of current sensing means, improve its installation and measuring comfort level, meet the needs of safe operation and the stable operation of electric power system.
Accompanying drawing explanation
Fig. 1 is the structural representation of fibre optic current sensor on-site calibration device of the present invention;
Fig. 2 is the structural representation of electrooptic modulator of the prior art;
Fig. 3 is the structural representation of the electrooptic modulator of fibre optic current sensor on-site calibration device of the present invention.
In figure, 1 is light source, and 2 is modulator, 3 is Transmission Fibers, and 4 is 1/4 wavelength filter, and 5 is optical fiber sensor head, 6 is catoptron, and 7 is photodetector, and 8 is by check sensor, 9 is fibre-optic current Check processing and display module, and 10 is signal electrode, and 11 is ground electrode, 12 is modulation and closed loop stack input signal, 13 is earth signal, and 14 is modulating input signal, and 15 is closed loop input signal.
Embodiment
Below in conjunction with drawings and embodiments, the invention will be further described:
Embodiment 1:
A kind of fibre optic current sensor on-site calibration device, comprise that the fibre-optic current being connected detects sensing module and fibre-optic current Check processing and display module 9, described fibre-optic current detects after sensing module employing is modulated reference light and compares and process the closed loop control mode that draws check results with detected signal again.
Embodiment 2:
As shown in Figure 1, a kind of fibre optic current sensor on-site calibration device, with embodiment 1, difference is that described fibre-optic current detects sensing module and is comprised of light source 1, linear polarizer, polarization separator, modulator 2, Transmission Fibers 3,1/4 wavelength filter 4, optical fiber sensor head 5, catoptron 6 and photodetector 7, described optical fiber sensor head 5 with by check sensor 8, be centered around on same busbar, described light source 1 is connected with modulator 2 with polarization separator by linear polarizer, described modulator 2 is connected with Transmission Fibers 3 again, described Transmission Fibers 3 is connected with 1/4 wavelength filter 4 again, described 1/4 wavelength filter 4 is connected with optical fiber sensor head 5 again, and described optical fiber sensor head 5 is connected with scintilloscope again, described light source 1 is also connected with photodetector 7, and described photodetector 7 is connected with fibre-optic current Check processing and display module 9 again, described fibre-optic current Check processing and display module 9 are connected again with by check sensor 8, the light that described light source 1 sends is reached linear polarizer, after polarization separator, reached modulator 2, modulator 2 recording wavelengths reach Transmission Fibers 3, Transmission Fibers 3 reaches 1/4 wavelength filter 4 by light signal, 1/4 wavelength filter 4 makes light signal generating right-handed polarized light and left-hand polarization light and reaches the optical fiber sensor head 5 around busbar, after optical fiber sensor head 5 transmission around busbar, be subject to monitoring current magnetic field wave phase change and reach catoptron 6, now light signal is reflected mirror 6 and reflects back, and successively through 1/4 wavelength filter 4, Transmission Fibers 3 and modulator 2 arrive photodetector 7, photodetector 7 and electron device detect the phase drift of light wave, the phase drift of described light wave is directly proportional to the electric current of wire, after the conversion of light/electricity, the digital signal of gained current values reaches fibre-optic current Check processing module, and described fibre-optic current Check processing and display module 9 compare above-mentioned digital signal to process by verification software with the simulating signal of being transmitted by check sensor 8 and draw check results.
Embodiment 3:
As shown in figures 1 and 3, a kind of fibre optic current sensor on-site calibration device, with embodiment 2, difference is that the modulation signal of described modulator 2 separates with closed signal, is applied to respectively on two arms of modulator 2.
Embodiment 4:
A fibre optic current sensor on-site calibration device, with embodiment 2, difference is that described optical fiber sensor head 5 adopts a sensor fibre that diameter is 4mm.
Embodiment 5:
A fibre optic current sensor on-site calibration device, with embodiment 4, difference is that described sensor fibre comprises optical fiber and is enclosed within its outer flexible protective layer; Described flexible protective layer adopts the sleeve pipe of being made by quartz material; Between described optical fiber and flexible protective layer, be filled with lubricant.
Embodiment 6:
A fibre optic current sensor on-site calibration device, with embodiment 4, difference is that described sensor fibre adopts annealing optical fiber.
Embodiment 7:
A fibre optic current sensor on-site calibration device, with embodiment 4, difference is that described sensor fibre adopts circular birefringent fiber.
Embodiment 8:
A fibre optic current sensor on-site calibration device, with embodiment 4, difference is that described sensor fibre adopts low birefringent fiber; Described fibre-optic current detects sensing module and is provided with support, and is fixed on busbar by support.
Embodiment 9:
A fibre optic current sensor on-site calibration device, with embodiment 4, difference is, that described support adopts is light, insulation and non-magnetic material are made; Described support is provided with optical fiber duct, and described optical fiber sensor head 5 is placed in optical fiber duct.
Embodiment 10:
A kind of fibre optic current sensor on-site calibration device, with embodiment 9, difference is, described support comprises first and the second portion all with optical fiber duct, described first and second portion removably connect into the closed hoop structure around described conductor bus one circle, the optical fiber duct of described first and the optical fiber duct of described second portion are combined into closed hoop, for placing described optical fiber sensor head 5.
Embodiment 11:
A fibre optic current sensor on-site calibration device, with embodiment 9, difference is, and the first of described support is U-shaped structure, and this U-shaped structure is connected and forms with two corner arms by three direct-connected arms all with optical fiber duct; The second portion of described support is connected and forms with a direct-connected arm by two corner arms all with optical fiber duct; Each corner arm of described second portion is all connected with a direct-connected arm of described first, and described first and second portion connect into described closed hoop structure.
Embodiment 12:
A fibre optic current sensor on-site calibration device, with embodiment 9, difference is that described support is fixedly installed on the crossbeam of the upper and lower both sides of described conductor bus; Described optical fiber sensor head 5 is rack-mount fixing around original position.
Embodiment 13:
A kind of fibre optic current sensor on-site calibration device, comprise that fibre-optic current detects sensing module and fibre-optic current Check processing and display module 9, described fibre-optic current detects sensing module and is comprised of light source 1, linear polarizer, polarization separator, modulator 2, Transmission Fibers 3,1/4 wavelength filter 4, optical fiber sensor head 5, catoptron 6 and photodetector 7, described optical fiber sensor head 5 with by check sensor 8, be centered around on same busbar, described light source 1 is connected with modulator 2 with polarization separator by linear polarizer, described modulator 2 is connected with Transmission Fibers 3 again, described Transmission Fibers 3 is connected with 1/4 wavelength filter 4 again, described 1/4 wavelength filter 4 is connected with optical fiber sensor head 5 again, and described optical fiber sensor head 5 is connected with scintilloscope again, described light source 1 is also connected with photodetector 7, and described photodetector 7 is connected with fibre-optic current Check processing and display module 9 again, described fibre-optic current Check processing and display module 9 are connected again with by check sensor 8, the light that described light source 1 sends is reached linear polarizer, after polarization separator, reached modulator 2, modulator 2 recording wavelengths reach Transmission Fibers 3, Transmission Fibers 3 reaches 1/4 wavelength filter 4 by light signal, 1/4 wavelength filter 4 makes light signal generating right-handed polarized light and left-hand polarization light and reaches the optical fiber sensor head 5 around busbar, after optical fiber sensor head 5 transmission around busbar, be subject to monitoring current magnetic field wave phase change and reach catoptron 6, now light signal is reflected mirror 6 and reflects back, and successively through 1/4 wavelength filter 4, Transmission Fibers 3 and modulator 2 arrive photodetector 7, photodetector 7 and electron device detect the phase drift of light wave, the phase drift of described light wave is directly proportional to the electric current of wire, after the conversion of light/electricity, the digital signal of gained current values reaches fibre-optic current Check processing module, and described fibre-optic current Check processing and display module 9 compare above-mentioned digital signal to process by verification software with the simulating signal of being transmitted by check sensor 8 and draw check results, the modulation signal of described modulator 2 separates with closed signal, is applied to respectively on two arms of modulator 2, described optical fiber sensor head 5 adopts a sensor fibre that diameter is 4mm, described sensor fibre comprises optical fiber and is enclosed within its outer flexible protective layer, described flexible protective layer adopts the sleeve pipe of being made by quartz material, between described optical fiber and flexible protective layer, be filled with lubricant, described sensor fibre adopts single-mode fiber, described fibre-optic current detects sensing module and is provided with support, and is fixed on busbar by support, that described support adopts is light, insulation and non-magnetic material are made, described support is provided with optical fiber duct, and described optical fiber sensor head 5 is placed in optical fiber duct, described support comprises first and the second portion all with optical fiber duct, described first and second portion removably connect into the closed hoop structure around described conductor bus one circle, the optical fiber duct of described first and the optical fiber duct of described second portion are combined into closed hoop, for placing described optical fiber sensor head 5, described support is fixedly installed on base, described optical fiber sensor head 5 is rack-mount fixing around original position.
Embodiment 14:
A fibre optic current sensor on-site calibration device, with embodiment 13, difference is that described Transmission Fibers 3 is fixed connection structure with optical fiber sensor head 5; Described Transmission Fibers 3 is arranged in control box; Described fibre-optic current Check processing and display module 9 adopt computer; Described fibre-optic current Check processing and display module 9 are also connected with printer; The light signal that light source 1 sends is to reach linear polarizer by waveguide; Described light source 1 adopts SLD light source 1; Described phase-modulator 2 adopts PZT modulator 2; Described 1/4 wavelength filter 4 adopts full optical-fibre wave plate; Described light source 1, linear polarizer, polarization separator, modulator 2, Transmission Fibers 3,1/4 wavelength filter 4, around adopting full optical fiber to connect between busbar optical fiber, catoptron 6 and photodetector 7; Described fibre-optic current detects sensing module and also comprises temperature sensor.
Embodiment 15:
A fibre optic current sensor on-site calibration device, with embodiment 13, difference is that described light source 1 adopts LED light source 1, described phase-modulator 2 employing electrooptic modulators 2, the full optical-fibre wave plate of described 1/4 wavelength filter 4 employing.
Embodiment 16:
A fibre optic current sensor on-site calibration device, with embodiment 15, difference is,, described phase-modulator 2 adopts integrated optical modulators 2.
Embodiment 17:
A kind of fibre optic current sensor on-site calibration device, with embodiment 13, difference is that described temperature sensor is arranged on described support, to detect described fibre-optic current, detects the temperature of sensing module and this temperature signal is reached to described fibre-optic current Check processing and display module 9.
Embodiment 18:
The using method of described fibre optic current sensor on-site calibration device, comprises the following steps:
The first step, detects sensing module by fibre-optic current rack-mount, and be fixed on by the busbar of same of check sensor 8; That described support adopts is light, insulation and non-magnetic material are made;
Second step, by optical fiber sensor head 5 fixed installations;
The 3rd step, guides to the simulating signal of being exported by check sensor 8 on the corresponding ports of fibre-optic current Check processing and display module 9;
The 4th step, by fibre-optic current Check processing and display module 9 arrange interface for by the identical range of check sensor 8, and corresponding ratio output signal;
The 5th step, after setting completes, by determining instruction, automatically get back to Calibration interface, by the electric current that increases or reduce busbar with automatic display measurement position fibre-optic current detect the measured value of sensing module, by the measured value of check sensor 8, its two difference number percent, squiggle figure, and the temperature and humidity situation of verification while detecting;
The 6th step, when increasing or reducing the electric current of busbar, changes detection check location point and pauses, and repeats above-mentioned the 5th step.
Embodiment 19:
The using method of described fibre optic current sensor on-site calibration device, with embodiment 17, difference is, after the 6th step, further comprising the steps of:
The 7th step, prints check results report by printer, and the testing result on described check results report is 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% form of classifying according to difference number percent automatically.
Embodiment 20:
The application of described fibre optic current sensor on-site calibration device in the detection check of the current detection sensor of electric its on-the-spot long-term work of chemical field of electrolytic aluminium, cathode copper, electric smelting or field of electroplating.
The detailed description that above-mentioned specific embodiment is just done in order to understand the present invention better.Obviously can carry out different modification and remodeling to the present invention not exceeding claim limited range.Therefore, above-described embodiment only has exemplary and does not have a limiting sense.
Claims (10)
1. a fibre optic current sensor on-site calibration device, comprise that the fibre-optic current being connected detects sensing module and fibre-optic current Check processing and display module (9), is characterized in that: described fibre-optic current detects after sensing module employing is modulated reference light and compares and process the closed loop control mode that draws check results with detected signal again.
2. fibre optic current sensor on-site calibration device as claimed in claim 1, is characterized in that: described fibre-optic current detects sensing module and is comprised of light source (1), linear polarizer, polarization separator, modulator (2), Transmission Fibers (3), 1/4 wavelength filter (4), optical fiber sensor head (5), catoptron (6) and photodetector (7), described optical fiber sensor head (5) with by check sensor (8), be centered around on same busbar, described light source (1) is connected with modulator (2) with polarization separator by linear polarizer, described modulator (2) is connected with Transmission Fibers (3) again, described Transmission Fibers (3) is connected with 1/4 wavelength filter (4) again, described 1/4 wavelength filter (4) is connected with optical fiber sensor head (5) again, and described optical fiber sensor head (5) is connected with scintilloscope again, described light source (1) is also connected with photodetector (7), and described photodetector (7) is connected with fibre-optic current Check processing and display module (9) again, described fibre-optic current Check processing and display module (9) are connected again with by check sensor (8), the light that described light source (1) sends is reached linear polarizer, after polarization separator, reached modulator (2), modulator (2) recording wavelength reaches Transmission Fibers (3), Transmission Fibers (3) reaches 1/4 wavelength filter (4) by light signal, 1/4 wavelength filter (4) makes light signal generating right-handed polarized light and left-hand polarization light and reaches the optical fiber sensor head (5) around busbar, after the optical fiber sensor head around busbar (5) transmission, changed by monitoring current magnetic field wave phase and reach catoptron (6), now light signal is reflected mirror (6) and reflects back, and successively through 1/4 wavelength filter (4), Transmission Fibers (3) and modulator (2) arrive photodetector (7), photodetector (7) and electron device detect the phase drift of light wave, the phase drift of described light wave is directly proportional to the electric current of wire, after the conversion of light/electricity, the digital signal of gained current values reaches fibre-optic current Check processing module, and described fibre-optic current Check processing and display module (9) compare above-mentioned digital signal to process by verification software with the simulating signal of being transmitted by check sensor (8) and draw check results.
3. fibre optic current sensor on-site calibration device as claimed in claim 1, is characterized in that: the modulation signal of described modulator (2) separates with closed signal, is applied to respectively on two arms of modulator (2).
4. fibre optic current sensor on-site calibration device as claimed in claim 1, is characterized in that: described optical fiber sensor head (5) adopts the sensor fibre that a diameter is 4mm.
5. fibre optic current sensor on-site calibration device as claimed in claim 4, it is characterized in that: described sensor fibre adopts single-mode fiber or circular birefringent fiber or low birefringent fiber or annealing optical fiber, and described sensor fibre comprises optical fiber and is enclosed within its outer flexible protective layer; Described flexible protective layer adopts the sleeve pipe of being made by quartz material; Between described optical fiber and flexible protective layer, be filled with lubricant.
6. the fibre optic current sensor on-site calibration device as described in claim 1-5 any one, is characterized in that: described fibre-optic current detects sensing module and is provided with support, and is fixed on busbar by support; That described support adopts is light, insulation and non-magnetic material are made; Described support is fixedly installed on base or is fixedly installed on the crossbeam of the upper and lower both sides of described conductor bus; Described support is provided with optical fiber duct, and described optical fiber sensor head (5) is placed in optical fiber duct; Described optical fiber sensor head (5) is rack-mount fixing around original position; Described support comprises first and the second portion all with optical fiber duct, described first and second portion removably connect into the closed hoop structure around described conductor bus one circle, the optical fiber duct of described first and the optical fiber duct of described second portion are combined into closed hoop, for placing described optical fiber sensor head (5); Or the first of described support is U-shaped structure, this U-shaped structure is connected and forms with two corner arms by three direct-connected arms all with optical fiber duct; The second portion of described support is connected and forms with a direct-connected arm by two corner arms all with optical fiber duct; Each corner arm of described second portion is all connected with a direct-connected arm of described first, and described first and second portion connect into described closed hoop structure.
7. the fibre optic current sensor on-site calibration device as described in claim 1-5 any one, is characterized in that: described Transmission Fibers (3) is fixed connection structure with optical fiber sensor head (5); Described Transmission Fibers (3) is arranged in control box; Described fibre-optic current Check processing and display module (9) adopt computer; Described fibre-optic current Check processing and display module (9) are also connected with printer; The light signal that light source (1) sends is to reach linear polarizer by waveguide; Described light source (1) adopts SLD light source (1) or LED light source (1), and described phase-modulator (2) adopts PZT modulator (2) or electrooptic modulator (2) or integrated optical modulator (2), and described 1/4 wavelength filter (4) adopts full optical-fibre wave plate; Described light source (1), linear polarizer, polarization separator, modulator (2), Transmission Fibers (3), 1/4 wavelength filter (4), around adopting full optical fiber to connect between busbar optical fiber, catoptron (6) and photodetector (7); Described fibre-optic current detects sensing module and also comprises temperature sensor; Described temperature sensor is arranged on described support, to detect described fibre-optic current, detects the temperature of sensing module and this temperature signal is reached to described fibre-optic current Check processing and display module (9).
8. a using method for fibre optic current sensor on-site calibration device, comprises the following steps:
The first step, detects sensing module by fibre-optic current rack-mount, and be fixed on by the busbar of same of check sensor (8); That described support adopts is light, insulation and non-magnetic material are made;
Second step, fixedly mounts optical fiber sensor head (5);
The 3rd step, will be guided on the corresponding ports of fibre-optic current Check processing and display module (9) by the simulating signal of check sensor (8) output;
The 4th step, by fibre-optic current Check processing and display module (9) arrange interface for by the identical range of check sensor (8), and corresponding ratio output signal;
The 5th step, after setting completes, by determining instruction, automatically get back to Calibration interface, by the electric current that increases or reduce busbar with automatic display measurement position fibre-optic current detect the measured value of sensing module, by the measured value of check sensor (8), its two difference number percent, squiggle figure, and the temperature and humidity situation of verification while detecting;
The 6th step, when increasing or reducing the electric current of busbar, changes detection check location point and pauses, and repeats above-mentioned the 5th step.
9. the using method of fibre optic current sensor on-site calibration device as claimed in claim 8, is characterized in that: after the 6th step, further comprising the steps of:
The 7th step, prints check results report by printer, and the testing result on described check results report is 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% form of classifying according to difference number percent automatically.
10. the application of the fibre optic current sensor on-site calibration device as described in claim 1-7 any one in the detection check of the current detection sensor of electric its on-the-spot long-term work of chemical field of electrolytic aluminium, cathode copper, electric smelting or field of electroplating.
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