CN102012285B - Micro-sensing optical unit and embedded application thereof - Google Patents
Micro-sensing optical unit and embedded application thereof Download PDFInfo
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- CN102012285B CN102012285B CN201010545920.3A CN201010545920A CN102012285B CN 102012285 B CN102012285 B CN 102012285B CN 201010545920 A CN201010545920 A CN 201010545920A CN 102012285 B CN102012285 B CN 102012285B
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a micro-sensing optical unit which is embedded inside or outside a cable, comprises a micro-sensing optical unit body and is characterized in that the micro-sensing optical unit body comprises an optical fiber for sensing, wherein a sealed stainless steel pipe is coated outside the optical fiber for sensing, and water-blocking fiber paste is filled in the stainless steel pipe; the number of the optical fiber for sensing can be 1 or two or plural, and the fiber excess length range in the stainless steel pipe is that the excess length is not less than 0 and less than 0.03%. The invention further relates to a cable, an optical cable, an aerial bare line and a submarine cable applying the structure in an embedded manner. The micro-sensing optical unit has high sensitivity to measured information of outside and can respond to temperature and strain in real time, the embedding process is simple and does not change the original performances of the optical cable, the temperature change can be reflected in a real-time manner, the smaller fiber excess length in the pipe can reduce the region of a stress and strain window of the optical fiber, the sensitivity to external stress (strain) reaction of the optical fiber can be improved, and the micro-sensing optical unit can not change the original structure and the performances of the optical cable and be embedded in the appropriate part of the optical cable and the cable.
Description
Technical field
The present invention relates to the distributed on-line measurement sensing of optical fiber, relate in particular to cable, optical cable, aerial bare line and the extra large cable of a kind of little shape sense light unit and embedded this structure of utilization.
Background technology
Optical fiber sensing technology is is carrier with light, be the novel sensing technology of medium, perception external information with optical fiber.Utilize the various characteristics of optical fiber, optical fiber can be made various kinds of sensors, but it is spot distribution in the space, except measurement point is discontinuous, also additionally needs transmission line (optical cable or cable).
Distribution type fiber-optic is measured sensor-based system can be on the continuous length of whole piece optical fiber, provide information measured with the variation of fiber length with the continuous function of distance form, used optical fiber or optical cable are except directly becoming the distributed sensing element also simultaneously for detection of transmission of Information.In recent years, oneself is widely used in the occasions such as temperature, optical cable warning fence, dam bridge structure health detection of leakage, the transmission of electricity cable of oil/gas pipe as the optical fiber distributed type sensing technology of sensing transfer element to utilize light unit in communications optical cable or the communications optical cable.
Distribution type fiber-optic is measured sensor-based system and is broadly divided into temperature and strain (stress) two big classes, and the both wishes that temperature and the strain (stress) in the external world transmit as soon as possible and be applied on the optical fiber.Yet, the structure of all general communication optical cables (comprising the light unit) design premises and cardinal rule all are that optical fiber and external action (temperature, external force, vibration, wet damp environment etc.) in the cable especially to being that external stress is isolated as much as possible, are reliably transmitted under the condition that is not subjected to external action to guarantee light signal.So, concerning the general communication optical cable, one " ess-strain window " must be arranged, when namely optical cable in certain scope strain takes place, thereby optical fiber wherein is not subjected to stress strain does not take place.In order to reach this purpose, mainly adopt two kinds of methods simultaneously: first optical fiber relaxes in protection tube (light unit), because of communications optical cable inner fiber quantity more, so the size of light unit is bigger; It two is that the relative protection tube of optical fiber has redundant length (excess fiber length), and in order to satisfy the needs of ess-strain window, this surplus length should be enough big.Bigger light unit size makes extraneous physics field information produce than long time delay the transmission of optical fiber, and enough big surplus length makes optical fiber insensitive in wideer range of strain.So Bian is low with the optical fiber distributed type sensing technology sensitivity of general communication optical cable or light unit, real-time is relatively poor, obviously, the general communication optical cable as distributed sensing with being not optimal.
Summary of the invention
An object of the present invention is to provide a kind of little shape sense light unit.
Another object of the present invention provides a kind of cable, optical cable, aerial bare line and extra large cable that uses this little shape sense light cellular construction.
The technical solution used in the present invention is:
Little shape sense light unit, embed inside or the outside of cable, it comprises little shape sense light cell body, and described little shape sense light cell body comprises sensing optical fiber, described sensing is coated with the stainless-steel tube of sealing with optical fiber, is filled with the fine cream that blocks water in the described stainless-steel tube; Described sensing is 1 or 2 or many with the quantity of optical fiber, and the surplus long scope of described stainless-steel tube inner fiber is: 0≤surplus length＜0.03%.
Described stainless-steel tube is coated with sheath.
A kind of cable that utilizes described little shape sense light unit to carry out thermometric, described cable comprises conductor core wire and cable jacket, also comprise micro sensing light unit, the stainless-steel tube of described little shape sense light unit is coated with sheath, the described micro sensing light unit that has a sheath and cable core synchronously stranded in cable inside or be wound in the outside of cable jacket.
A kind of optical cable that utilizes described little shape sense light unit to carry out strain sensing, described optical cable comprises duct optical cable and buried cable, described duct optical cable comprises general communication light unit and cable outer sheath, described buried cable comprises general communication light unit, cable armor steel wire and cable outer sheath, also comprise micro sensing light unit, sheath is not with in described micro sensing light unit, described not stranded in duct optical cable inside with micro sensing light unit and the general communication usefulness light units synchronization of sheath, described synchronously stranded between the general communication usefulness light unit and cable outer sheath of buried cable with micro sensing light unit and the cable armor steel wire of sheath.
A kind of aerial bare line that utilizes described little shape sense light unit to measure temperature and strain sensing, described aerial bare line comprises Optical Fiber composite overhead Ground Wire and the compound built on stilts phase line of optical fiber, described Optical Fiber composite overhead Ground Wire comprises general communication light unit and aluminum-clad steel wire, the compound built on stilts phase line of described optical fiber comprises general communication light unit, aluminum-clad steel wire and electrician's aluminum or aluminum alloy line, also comprise micro sensing light unit, sheath is not with in described micro sensing light unit, described not stranded in the aluminum-clad steel wire inside of Optical Fiber composite overhead Ground Wire, described not stranded in the compound built on stilts phase line of optical fiber inside with little shape sense light unit and electrician's aluminum or aluminum alloy line locking of sheath with the light units synchronization with micro sensing light unit and the general communication of sheath.
A kind of extra large cable that utilizes described little shape sense light unit to measure temperature and strain sensing, described extra large cable wrap is drawn together submarine communication cable and sea floor optoelectronic composite cable, described submarine communication cable comprises general communication light unit and cable armor steel wire, described sea floor optoelectronic composite cable comprises general communication light unit, the cable armor steel wire, cable conduction core and cable jacket, also comprise micro sensing light unit, sheath is not with in described micro sensing light unit, and is described not stranded in submarine communication cable inside with the light units synchronization with micro sensing light unit and the general communication of sheath; Described little shape sense light unit comprises the micro sensing light unit of being with sheath and not with the micro sensing light unit of sheath, the synchronously stranded general communication in sea floor optoelectronic composite cable of little shape sense light unit of described band sheath and cable armor steel wire is used between light unit and the cable conduction core, and is described synchronously not stranded in the cable jacket of sea floor optoelectronic composite cable with micro sensing light unit and the cable armor steel wire of sheath.
Advantage of the present invention is: to external world information measured highly sensitive, to temperature and strain real time reaction and embed technology and simply, do not change original optical cable performance, the heat conductivility of stainless steel material is much better than the plastic material of conventional optical fiber cables unit, thereby can the real time reaction temperature variation, less excess fiber length has dwindled the zone of optical fiber " ess-strain window " in the pipe, improved the optical fiber sensitivity of stress (strain) reaction to external world, little shape sense light unit can not change the original structure of optical cable and performance and be embedded in the suitable position of optical cable and cable.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is little shape sense light cellular construction synoptic diagram of not being with sheath.
Fig. 2 is little shape sense light cellular construction synoptic diagram of band sheath.
Fig. 3 utilizes little shape sense light unit to carry out the construction of cable synoptic diagram of inner thermometric.
Fig. 4 utilizes little shape sense light unit to carry out the construction of cable synoptic diagram of surface temperature measurement.
Fig. 5 utilizes little shape sense light unit to carry out the duct optical cable structural representation of strain sensing.
Fig. 6 utilizes little shape sense light unit to carry out the buried cable structural representation of strain sensing.
Fig. 7 utilizes little shape sense light unit to carry out the Optical Fiber composite overhead Ground Wire structural representation of temperature survey and strain sensing.
Fig. 8 utilizes little shape sense light unit to carry out the compound built on stilts phase line structural representation of optical fiber of temperature survey and strain sensing.
Fig. 9 utilizes little shape sense light unit to carry out the submarine communication cable structural representation of strain sensing.
Figure 10 utilizes little shape sense light unit to carry out the sea floor optoelectronic composite cable structural representation of strain sensing.
Wherein: 1, sensing optical fiber, 2, the fine cream that blocks water, 3, stainless-steel tube, 4, sheath, 5, little shape sense light unit of band sheath, 6, not with the sense light unit of sheath, 7, cable conductor heart yearn, 8, cable jacket, 9, general communication light unit, 10, the cable armor steel wire, 11, cable outer sheath, 12, aluminum-clad steel wire, 13, electrician's aluminum steel or aluminium alloy wire, 14, the cable conduction core.
Embodiment
Little shape sense light unit as illustrated in fig. 1 and 2, embed inside or the outside of cable, it comprises little shape sense light cell body, and little shape sense light cell body comprises sensing optical fiber 1, sensing is coated with the stainless-steel tube 3 of sealing with optical fiber 1, is filled with the fine cream 2 that blocks water in the stainless-steel tube 3; Sensing is 1 or 2 or many with the quantity of optical fiber 1, and the surplus long scope of stainless-steel tube 3 inner fibers is: 0≤surplus length＜0.03%.Also can be coated with sheath 4 outside the stainless-steel tube 3.
Little shape sense light unit is by the specialized equipment manufacturing; the protection tube of little shape sense light unit is that the stainless-steel tube 3 of 0.15mm-0.2mm is made through moulding, laser bonding, sizing drawing with thickness usually; in stainless-steel tube 3 moulding the input sensing with optical fiber 1 with block water fine cream 2; sensing is generally 1～2 with the quantity of optical fiber 1, also can be many.Sensing can be conventional multimode or single-mode fiber with optical fiber 1; also can be other special optical fibers; multifiber generally is of the same type; it also can be the mixing of dissimilar optical fiber; excess fiber length in the pipe should be less than 0.03%; do not allow negative surplus length; the fine cream 2 that blocks water in the pipe has resistance effect; according to different applied environments; the fine cream 2 that blocks water also can have the other characteristic individually or simultaneously; as inhale hydrogen; low temperature resistant; high temperature resistant; performances such as heat conduction as required, extrude the sheath 4 of the suitable material such as PEF of suitable thickness outside little shape stainless-steel tube 3 sense light unit 1 of making.
Shown in Fig. 3 and 4, utilize embodiment 1 described little shape sense light unit to carry out the cable of thermometric, cable comprises cable conductor heart yearn 7 and cable jacket 8, also comprise micro sensing light unit, the stainless-steel tube 3 of little shape sense light unit is wrapped with sheath 4, the micro sensing light unit 5 that has a sheath and cable conductor heart yearn 7 synchronously stranded in cable inside or be wound in the outside of cable jacket 8.Owing to cable insulating requirements is arranged in the present embodiment, the general little shape sense light unit 5 that adopts the band sheath, Fig. 3 is the construction of cable synoptic diagram of detection streamer internal temperature, the sense light unit 5 of band sheath can be 1 or many, is that the sense light unit 5 of 3 band sheaths is stranded synchronously with cable core among Fig. 3.Fig. 4 is the construction of cable synoptic diagram of detection streamer hull-skin temperature, and the sense light unit 5 of band sheath can be 1 or many, is that the sense light unit 5 of 1 band sheath is wound in the outside of cable jacket 8 among Fig. 4.
As shown in Figure 5, utilize embodiment 1 described little shape sense light unit to carry out the duct optical cable of strain sensing, duct optical cable comprises general communication light unit 9 and cable outer sheath 11, also comprise micro sensing light unit, sheath is not with in micro sensing light unit, and is synchronously not stranded in duct optical cable inside with light unit 9 with general communication with the micro sensing light unit 6 of sheath.Not with the external diameter of little shape sense light unit 6 of sheath and the clearance fit of general communication light unit 9, it is tangent to make it the circular trace formed with general communication light unit 9.
As shown in Figure 6, utilize embodiment 1 described little shape sense light unit to carry out the buried cable of strain sensing, buried cable comprises general communication light unit 9, cable armor steel wire 10 and cable outer sheath 11, also comprise micro sensing light unit, sheath is not with in micro sensing light unit, does not use between light unit 9 and the cable outer sheath 11 with micro sensing light unit 6 and the cable armor steel wire 10 synchronously stranded general communications in buried cable of sheath.Cable armor steel wire 10 is used between the light unit 9 at cable outer sheath 11 and general communication, the external diameter with little shape sense light unit 6 of sheath should not be the minus tolerances in cable armor steel wire 10 nominals footpath, should control the laying tension of little shape sense light unit in process of production.
As shown in Figure 7, utilize embodiment 1 described little shape sense light unit to measure the Optical Fiber composite overhead Ground Wire of temperature and strain sensing, Optical Fiber composite overhead Ground Wire comprises general communication light unit 9 and aluminum-clad steel wire 12, also comprise micro sensing light unit, sheath is not with in micro sensing light unit, and is synchronously not stranded in aluminum-clad steel wire 12 inside of Optical Fiber composite overhead Ground Wire with light unit 9 with general communication with the micro sensing light unit 6 of sheath.
As shown in Figure 8, utilize embodiment 1 described little shape sense light unit to measure the compound built on stilts phase line of optical fiber of temperature and strain sensing, the compound built on stilts phase line of optical fiber comprises general communication light unit 9, aluminum-clad steel wire 12 and electrician's aluminum steel or aluminium alloy wire 13, also comprise micro sensing light unit, sheath is not with in micro sensing light unit, and is synchronously not stranded in the compound built on stilts phase line of optical fiber inside with electrician's aluminum steel or aluminium alloy wire 13 with little shape sense light unit 6 of sheath.
The compound built on stilts phase line of Optical Fiber composite overhead Ground Wire shown in Figure 7 and optical fiber shown in Figure 8 is two kinds of aerial bare line, aerial bare line is to comprise steel-cored aluminium strand, aluminium alloy stranded conductor, Optical Fiber composite overhead Ground Wire, all are the twisted wire of feature with the concentric strand of round metal line for the compound built on stilts phase lines of optical fiber etc., their twisted wire structure is identical, for many strand layer structures, little shape sense light unit can embed different strand layers, but its external diameter should with electrician's aluminum steel or aluminium alloy wire 13 or aluminum-clad steel wire 12 clearance fit with strand layer, make it tangent with the circular trace of forming with layer metal single line, should control the laying tension of little shape sense light unit in process of production.
As shown in Figure 9, utilize embodiment 1 described little shape sense light unit to measure the submarine communication cable of temperature and strain sensing, submarine communication cable comprises general communication light unit 9 and cable armor steel wire 10, also comprise micro sensing light unit, sheath is not with in micro sensing light unit, and is synchronously not stranded in submarine communication cable inside with cable armor steel wire 10 with little shape sense light unit 6 of sheath.
As shown in figure 10, utilize embodiment 1 described little shape sense light unit to measure the sea floor optoelectronic composite cable of temperature and strain sensing, sea floor optoelectronic composite cable comprises general communication light unit 9, cable armor steel wire 10, cable conduction core 14 and cable jacket 8, also comprise micro sensing light unit, little shape sense light unit comprises the micro sensing light unit 5 of being with sheath and not with the micro sensing light unit 6 of sheath, little shape sense light unit 5 synchronously stranded general communications in sea floor optoelectronic composite cable of band sheath are used between light unit 9 and the cable conduction core 14, and are synchronously not stranded in the cable jacket 8 of sea floor optoelectronic composite cable with cable armor steel wire 10 with the micro sensing light unit 6 of sheath.
The sea cable mainly comprises submarine communication cable and sea floor optoelectronic composite cable two big classes, and except cable core, cable armor steel wire 10 has individual layer armouring and patterns such as bilayer and multilayer armouring.
The present invention embeds little shape sense light cellular construction of embodiment 1 under the prerequisite that does not change the original performance of cable, improved optical fiber to external world stress (strain) reaction sensitivity, to temperature and strain real time reaction, the present invention is unrestricted to the optical fiber model, and the optical fiber of all models all is applicable to structure of the present invention.The present invention is with little shape sense light cellular construction of embodiment 1 above-described embodiment that is not limited to as the cable arrangement ingredient, and other cables or cable configuration that present embodiment is not enumerated still belong to protection scope of the present invention.
Claims (1)
1. optical cable that utilizes little shape sense light unit to carry out strain sensing, it comprises little shape sense light cell body, described little shape sense light cell body embeds inside or the outside of cable, it comprises sensing optical fiber, described sensing is coated with the stainless-steel tube of sealing with optical fiber, is filled with the fine cream that blocks water in the described stainless-steel tube; Described sensing is 1 or 2 or many with the quantity of optical fiber, the surplus long scope of described stainless-steel tube inner fiber is: 0≤surplus length＜0.03%, described stainless-steel tube is coated with sheath, described optical cable comprises duct optical cable and buried cable, described duct optical cable comprises general communication light unit and cable outer sheath, described buried cable comprises general communication light unit, cable armor steel wire and cable outer sheath, it is characterized in that: sheath is not with in described little shape sense light unit, described not stranded in duct optical cable inside with little shape sense light unit and the general communication usefulness light units synchronization of sheath, described synchronously stranded between the general communication usefulness light unit and cable outer sheath of buried cable with little shape sense light unit and the cable armor steel wire of sheath.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545920.3A CN102012285B (en) | 2010-11-16 | 2010-11-16 | Micro-sensing optical unit and embedded application thereof |
| CN201210083940.2A CN102636848B (en) | 2010-11-16 | 2010-11-16 | Submarine cable for measuring temperature and sensing strain by aid of miniature sensing optical unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010545920.3A CN102012285B (en) | 2010-11-16 | 2010-11-16 | Micro-sensing optical unit and embedded application thereof |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210083940.2A Division CN102636848B (en) | 2010-11-16 | 2010-11-16 | Submarine cable for measuring temperature and sensing strain by aid of miniature sensing optical unit |
| CN201210459485.1A Division CN102967390B (en) | 2010-11-16 | 2010-11-16 | Temperature measuring and strain sensing aerial bare line by using micro sensing optical unit |
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| Publication Number | Publication Date |
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| CN102012285A CN102012285A (en) | 2011-04-13 |
| CN102012285B true CN102012285B (en) | 2013-09-04 |
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| CN201010545920.3A Active CN102012285B (en) | 2010-11-16 | 2010-11-16 | Micro-sensing optical unit and embedded application thereof |
| CN201210083940.2A Active CN102636848B (en) | 2010-11-16 | 2010-11-16 | Submarine cable for measuring temperature and sensing strain by aid of miniature sensing optical unit |
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| CN201210083940.2A Active CN102636848B (en) | 2010-11-16 | 2010-11-16 | Submarine cable for measuring temperature and sensing strain by aid of miniature sensing optical unit |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102636848A (en) | 2012-08-15 |
| CN102012285A (en) | 2011-04-13 |
| CN102636848B (en) | 2015-07-15 |
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