CN209727306U - The pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point - Google Patents
The pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point Download PDFInfo
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- CN209727306U CN209727306U CN201920728420.XU CN201920728420U CN209727306U CN 209727306 U CN209727306 U CN 209727306U CN 201920728420 U CN201920728420 U CN 201920728420U CN 209727306 U CN209727306 U CN 209727306U
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- measuring point
- optical fiber
- temperature sensitive
- transition connector
- sensitive measuring
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Abstract
The pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point provided by the utility model.The encapsulating structure includes sequentially connected top plug, metal sleeve, transition connector and armored fiber optic sheath, is equipped with optical fiber and temperature sensitive measuring point in metal sleeve, and the origin end of optical fiber and temperature sensitive measuring point is fixed on the plug of top；The caliber of transition connector is greater than metal sleeve, the tail optical fiber of optical fiber and temperature sensitive measuring point is inserted into transition connector with free extension shape, and spirally or after slightly cyclic bending shape spirals is drawn in insertion armored fiber optic sheath from the fixed of transition connector tail portion in transition connector；It is indicated in the outside of metal sleeve equipped with measuring point corresponding with the temperature sensitive point position on optical fiber and temperature sensitive measuring point.The utility model can guarantee optical fiber along the orientation distance of Cheng Wenmin measuring point and its top under large span temperature change, effectively raise the position precision of temperature sensitive measuring point and actual spot of measurement quasi-distributed on optical fiber, improve the measurement accuracy of sensor.
Description
Technical field
The utility model belongs to Fiber Optic Pyrometer field, and in particular to a kind of pinpoint fiber optic temperature biography of multi-measuring point
Sensor encapsulating structure.
Background technique
Fibre optic temperature sensor perceives optical fiber by the optical signal propagated in inside of optical fibre along the temperature change of journey.Due to
Induction and transmitting to temperature can not be related to electric signal, therefore fibre optic temperature sensor essential safety, and optical fiber has resistance to height
The features such as low temperature, radiation resistance, small diameter, is particularly suitable for making in the particular surroundings such as inflammable and explosive danger, strong-electromagnetic field, irradiation
With, therefore fibre optic temperature sensor has extensively in fields such as Oil & Gas Storage, power transmission, aerospace, weaponry, nuclear industry
Wealthy application prospect.
Fibre optic temperature sensor is to utilize the micro-nano structures such as fibre scattering effect or grating, F-P cavity, MZ chamber shape on optical fiber
At distributed or quasi-distributed temperature sensitive measuring point, and then realize that optical fiber is measured along the distributed or quasi-distributed temperature of journey.Optical fiber
General using quartz or have the crystalline materials such as more dystectic sapphire and be made, fibre optic temperature sensor engineer application it
Before, it is necessary to protectiveness encapsulation is carried out to optical fiber, to adapt to the adverse circumstances such as high temperature, radiation.Existing fibre optic temperature sensor
It mostly uses metal tube as outer enclosure structure greatly, the heat transfer between metal tube and internal optical fiber is carried out by gas, is realized
The accurate measurement of environment temperature.However, the large span along with structural member temperature to be measured changes (such as -50 DEG C~1000 DEG C),
Apparent thermal expansion and cold contraction effect will occur in package metals pipe.Since the thermal expansion coefficient of optical fiber and protection metal tube has significance difference
Different, position migration is occurred for the measuring point for making fibre optic temperature sensor by traditional packing forms, deviates the true survey of object under test
Position is measured, stress fracture occurs for even optical fiber, eventually leads to measurement inaccuracy or sensor failure.
Summary of the invention
In order to solve the problems, such as the optical fiber point position relative depature in the variation of temperature large span of above-mentioned optical fiber and metal tube,
The utility model patent proposes a kind of pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point.
The utility model patent solves technical solution used by its technical problem are as follows: a kind of multi-measuring point accurate positioning
Fibre optic temperature sensor encapsulating structure, it is characterised in that: the encapsulating structure includes metal sleeve, optical fiber and temperature sensitive measuring point, top
Plug, transition connector and armored fiber optic sheath are held, the metal sleeve is the hollow metal casing of both ends open, metal sleeve
It is set in outside the thermometric section of optical fiber and temperature sensitive measuring point, top is sealed by top plug, and optical fiber and temperature sensitive measuring point are close
The origin end of top plug is fixedly connected with top plug；The caliber of the transition connector is greater than metal sleeve, wherein one end
It is connect with the tail end sealing of metal sleeve, the other end and armored fiber optic sheath are tightly connected, in the connecting end surface of transition connector
Offer optic fibre hole respectively, the tail optical fiber of the optical fiber and temperature sensitive measuring point is inserted into transition connector by optic fibre hole with free extension shape
It is interior, and spirally or after slightly cyclic bending shape spirals fixed from the optic fibre hole of transition connector tail portion in transition connector
It draws in insertion armored fiber optic sheath；It is equipped with and the temperature sensitive point position pair on optical fiber and temperature sensitive measuring point in the outside of metal sleeve
The measuring point mark answered.
The utility model preferably technical solution: the optical fiber in the optical fiber and temperature sensitive measuring point uses silica fibre, Lan Bao
Stone optical fiber, YAG crystal optical fibre, any one in photonic crystal fiber high-temperature resistant optical fiber；The temperature sensitive measuring point arranged on optical fiber
For micro-nano technologies structures such as fiber grating, fiber F-P cavity, optical fiber MZ chambers.
The utility model preferably technical solution: the transition connector has spiral shell with annular groove, the other end for one end
The stainless steel welded connector of the hollow cylindrical of line structure, the center of both ends of the surface offer optic fibre hole, the transition
The length of connector is 10~100mm, and internal diameter is 0.5~3mm, and outer diameter is 2~5mm.
The utility model preferably technical solution: laser welding is used between the optical fiber and temperature sensitive measuring point and top plug
Mode fix；The top plug, metal sleeve, transition connector, the side of being sealedly and fixedly connected between armored fiber optic sheath
Formula is adopted metal welding, is bolted, one of thermal structure glue sticking or any several combination；The optical fiber and temperature sensitive
The tail optical fiber of measuring point adopts metal welding or glass when being pierced by transition connector for free extension shape when penetrating transition connector
Glass bead weld connects or the mode of thermal structure glue sticking and transition connector are sealed fixation.
The utility model preferably technical solution: the metal sleeve is selected using in stainless steel tube, copper pipe, nickel alloy pipe
Any one, the length is 0.2~5mm, internal diameter is 0.3~0.9mm, and outer diameter is 0.5~1.5mm.
The utility model preferably technical solution: the top plug uses outer diameter stainless for the cylinder of 0.6~1.6mm
Steel welding plug.
The utility model preferably technical solution: the armored fiber optic sheath uses stainless steel flexible hose armored fiber optic sheath,
Its internal diameter is 0.5~1.5mm, and outer diameter is 0.9~2.5mm.
The utility model preferably technical solution: the measuring point mark is to be fixed on top plug with optical fiber and temperature sensitive measuring point
On endpoint be that origin by graduated scale measures distance of each temperature sensitive measuring point apart from origin on optical fiber, outside metal sleeve equidistantly
Position indicated.
The utility model preferably technical solution: the temperature test range of the optical fiber and temperature sensitive measuring point is -50~1000
DEG C, the temperature test range of the optical fiber and temperature sensitive measuring point is -50~1000 DEG C, and the optical fiber and temperature sensitive measuring point are placed in transition company
Connect the transition tail optical fiber length of the helical form or cyclic bending shape in device not less than the tediously long amount of optical fiber plus 4 length of transition connector it
With；The tediously long amount of optical fiber is calculated according to the coefficient of expansion of metal sheath material.
The utility model preferably technical solution: the optical fiber and temperature sensitive measuring point select polyimide coating or without coating
The II type optical fiber and temperature sensitive measuring point array that silica fibre or femto-second laser are scribed.
The package metals casing of the utility model is both ends open, and internal diameter is slightly larger than the hollow metal pipe of fibre external diameters,
Inside penetrates optical fiber and temperature sensitive measuring point with temperature sensitive measuring point, and one end sealing of top plug and optical fiber and temperature sensitive measuring point is solid
It is fixed, and be sealedly and fixedly connected with package metals casing one end, arranged distribution of the temperature sensitive measuring point on optical fiber determines that each temperature is surveyed
The position of point；The transition connector is the hollow metal sleeve that internal diameter is significantly greater than fibre diameter, one end and package metals
Bobbin seal is fixedly connected, and the other end is sealedly and fixedly connected with armored fiber optic sheath；The tail optical fiber of the optical fiber and temperature sensitive measuring point with
Helical form or slight cyclic bending shape are drawn inside transition connector, are protected by armored fiber optic sheath.The encapsulation gold
Belong to casing, top plug, transition connector, the mode of being sealedly and fixedly connected between armored fiber optic sheath can be used metal welding,
Threaded connection, thermal structure glue sticking etc..
Optical fiber one end in the utility model is fixed on the end socket of top, and the other end is equipped with helical form or slight cyclic bending
The buffer locations of shape, the temperature sensitive measuring point on optical fiber are equipped with measuring point on metal sleeve after measuring by graduated scale and mark,
Then optical fiber and temperature sensitive measuring point are penetrated in package metals casing, during casing expandable, optical fiber measuring point are driven to move together,
The position of the two still maintains unanimously, and the spiral part of tail end can eliminate the stress of optical fiber, avoids its fracture, and point position is specific
It is to be configured according to the position of object under test.
The utility model before the packaging, is joined according to maximum temperature to be measured, minimum temperature, material thermal expansion coefficient etc.
Number, the elongation of package metals casing when calculating total temperature range, in this, as the tediously long amount of optical fiber；Helical form is slight reciprocal
The transition optical fiber length that bending freely passes into transition connector adds the sum of transition connector length not less than the tediously long amount of optical fiber.
Compared with prior art, the pinpoint fibre optic temperature sensor of multi-measuring point described in the utility model and its production
Method, can under large span temperature change (more than 1000 DEG C) guarantee optical fiber along Cheng Wenmin measuring point and its top orientation distance,
The position precision for effectively raising temperature sensitive measuring point and actual spot of measurement quasi-distributed on optical fiber eliminates because positioning is wrong
Misquote into temperature measurement disparity, to improve the measurement accuracy of sensor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1-metal sleeve, 2-optical fiber and temperature sensitive measuring point, 3-top plugs, 4-transition connectors, 5-armourings
The transition tail optical fiber of optical fiber jacket, 6-helical forms or cyclic bending shape, 7-measuring points mark.
Specific embodiment
To keep the technical solution of the utility model and advantage easier to understand, below in conjunction with specific embodiment, and reference
Attached drawing is described in further detail the utility model.Attached drawing 1 is the attached drawing of embodiment, is drawn by the way of simplified, is only used
In the purpose for clearly, compactly illustrating the utility model embodiment.It is below this reality to the technical solution showed in the accompanying drawings
With the concrete scheme of novel embodiment, it is not intended that limit the range of claimed invention.It is practical new based on this
Embodiment in type, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model
The pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point provided in embodiment, specifically such as Fig. 1 institute
Show, which includes metal sleeve 1, optical fiber and temperature sensitive measuring point 2, top plug 3, transition connector 4 and armored fiber optic shield
Set 5.The metal sleeve 1 is the hollow metal casing of both ends open, and internal diameter is slightly larger than fibre external diameters, and metal sleeve 1 is set in
Outside the thermometric section of optical fiber and temperature sensitive measuring point 2, top is sealed by top plug 3, and optical fiber and temperature sensitive measuring point 2 are close to top
The origin end of plug 3 is fixedly connected with top plug 3, and arranged distribution of the temperature sensitive measuring point on optical fiber determines each temperature point
Position；The caliber of the transition connector 4 is greater than metal sleeve 1, and wherein one end is connect with the tail end sealing of metal sleeve 1, separately
One end and armored fiber optic sheath 5 are tightly connected, and offer optic fibre hole, the optical fiber respectively in the connecting end surface of transition connector 4
And the tail optical fiber of temperature sensitive measuring point 2 by optic fibre hole with free extension shape be inserted into transition connector 4 in, and in transition connector 4 with
Helical form or slight cyclic bending shape are drawn in insertion armored fiber optic sheath 5 after spiraling from the optic fibre hole of 4 tail portion of transition connector,
Its position for being pierced by 4 tail portion optic fibre hole of transition connector is fixedly connected with transition connector 4.It is equipped in the outside of metal sleeve 1
Measuring point mark 7 corresponding with the temperature sensitive point position on optical fiber and temperature sensitive measuring point 2.
The temperature test range of the optical fiber and temperature sensitive measuring point 2 in the present embodiment be -50~1000 DEG C, the optical fiber and
Temperature sensitive measuring point 2 is placed in 6 length of transition tail optical fiber of helical form or cyclic bending shape in transition connector 4 not less than the tediously long amount of optical fiber
In addition the sum of 4 length of transition connector.
Package metals casing 1 in embodiment selects stainless steel capillary, length, internal-and external diameter be respectively 2m, 600um and
900um has many advantages, such as that small in size, heat transfer is fast, corrosion-resistant；Optical fiber and temperature sensitive measuring point 2 select the pure quartz of polyimide coating
The II type optical fiber and temperature sensitive measuring point array that optical fiber and femto-second laser are scribed, maximum operating temperature is up to 1000 after encapsulation
℃；Top plug 3 selects cylindrical stainless steel welded plug, outer diameter 1000um；Transition connector 4, which is designed as one end, to be had
The stainless steel welded connector of cylinder that there is helicitic texture, center to open up through-hole for annular groove, the other end, length, internal-and external diameter
Respectively 100mm, 2000um and 2500um；Armored fiber optic sheath 5 selects stainless steel flexible hose armored fiber optic sheath, and internal-and external diameter is
600um and 900um.
Optical fiber and temperature sensitive measuring point 2 are connect with top plug 3 for convenience in embodiment, and the optical fiber on top is carried out metal
Change, adopt metal welding mode for the origin of optical fiber and be fixed on top plug 3, then by metal welding by top plug 3 and
Package metals casing 1 is sealed fixation；Package metals casing 1 and transition connector 4 are connect by metal welding is sealed fixation；
The tail optical fiber for being pierced by transition connector 4 is sealed fixation by thermal structure glue sticking with 4 central through hole of transition connector；Armouring
Optical fiber jacket 5 and transition connector 4, which are connected through a screw thread, is sealed fixation.
The pinpoint specific packaging method of fibre optic temperature sensor encapsulating structure of multi-measuring point in embodiment is as follows:
(1) using optical fiber one end as origin, distance of each temperature sensitive measuring point apart from origin on optical fiber is measured with graduated scale, and sealing
It fills corresponding position on metal sleeve 1 and is equipped with measuring point mark 7, then package metals casing 1 is placed in fixed platform, by light
The thermometric section of fine and temperature sensitive measuring point 2 penetrates in package metals casing 1；
(2) origin position of optical fiber and temperature sensitive measuring point 2 is positioned to 1 top of package metals casing using top plug 3, and
It is sealed and is fixedly connected with package metals casing 1；
(3) after the tail optical fiber of optical fiber and temperature sensitive measuring point 2 is pierced by metal sleeve 1, according to temperature span range (- 50~1000
DEG C), package metals casing 1 use stainless steel sleeve pipe, the coefficient of expansion according to stainless steel material is about 15.2 × 10-6/ DEG C, it calculates
The maximal tensility of package metals casing 1 is about (2m × 1050 DEG C × 15.2 × 10 30mm out-6/ DEG C), it is superfluous in this, as optical fiber
Long amount；The transition not less than the tediously long amount of optical fiber plus the sum of 4 length of transition connector (100+30=130mm) is measured with graduated scale
Optical fiber, by the transition optical fiber of the length by spiral or it is slight it is reciprocating bending in a manner of freely pass into transition connector 4, tail optical fiber portion
Divide and be pierced by transition connector 4, and package metals casing 1 is tapped into row by metal welding with transition connector 4 and is sealedly and fixedly connected；
(4) tail optical fiber is pierced by from the optic fibre hole of 4 tail portion of transition connector, and is worn in the tail optical fiber in optical fiber and temperature sensitive measuring point 2
Out when transition connector 4, the tail optical fiber for being pierced by transition connector 4 and 4 central through hole of transition connector are passed through into thermal structure gluing
It connects and is sealed fixation；
(5) length that tail optical fiber is measured with graduated scale intercepts the armored fiber optic sheath 5 of corresponding length according to the length, will be from
The tail optical fiber that transition connector 4 is pierced by penetrates armored fiber optic sheath 5, and armored fiber optic sheath 5 is connected through a screw thread with transition connector 4
It is sealed fixation, completes the encapsulation of fibre optical sensor.
In conclusion the utility model lists one embodiment, but the utility model is not limited only to above-described embodiment, only
The technical effect that reach the utility model with any the same or similar means all should belong to the model of the utility model protection
It encloses.
Claims (10)
1. a kind of pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point, it is characterised in that: the encapsulating structure includes gold
Belong to casing (1), optical fiber and temperature sensitive measuring point (2), top plug (3), transition connector (4) and armored fiber optic sheath (5), the gold
Belong to the hollow metal casing that casing (1) is both ends open, metal sleeve (1) is set in the thermometric section of optical fiber and temperature sensitive measuring point (2)
Outside, top are sealed by top plug (3), and the origin end and top of optical fiber and temperature sensitive measuring point (2) close top plug (3)
End plug (3) is fixedly connected；The caliber of the transition connector (4) is greater than metal sleeve (1), wherein one end and metal sleeve
(1) tail end sealing connection, the other end and armored fiber optic sheath (5) are tightly connected, in the connecting end surface point of transition connector (4)
Do not offer optic fibre hole, the tail optical fiber of the optical fiber and temperature sensitive measuring point (2) is inserted into transition connection by optic fibre hole with free extension shape
In device (4), and in transition connector (4) spirally or cyclic bending shape spiral after from the light of transition connector (4) tail portion
Fine hole is fixed to draw in insertion armored fiber optic sheath (5)；It is equipped with and optical fiber and temperature sensitive measuring point (2) in the outside of metal sleeve (1)
On temperature sensitive point position corresponding measuring point mark (7).
2. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1, feature exist
In: the optical fiber in the optical fiber and temperature sensitive measuring point (2) uses silica fibre, sapphire fiber, YAG crystal optical fibre, photonic crystal
Any one in optical fiber high-temperature resistant optical fiber；The temperature sensitive measuring point arranged on optical fiber is fiber grating, fiber F-P cavity, optical fiber MZ
Any one in chamber.
3. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
Be: the transition connector (4) is the hollow cylindrical stainless steel weldering that one end has helicitic texture with annular groove, the other end
Connecting connector, the center of both ends of the surface offer optic fibre hole, and the length of the transition connector (4) is 10~100mm,
Internal diameter is 0.5~3mm, and outer diameter is 2~5mm.
4. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
It is: is fixed by the way of laser welding between the optical fiber and temperature sensitive measuring point (2) and top plug (3)；The top is stifled
Head (3), metal sleeve (1), transition connector (4), the mode that is sealedly and fixedly connected between armored fiber optic sheath (5) are using metal
It welds, be bolted, one of thermal structure glue sticking or any several combination；The optical fiber and temperature sensitive measuring point (2)
Tail optical fiber adopts metal welding or glass when being pierced by transition connector (4) for free extension shape when penetrating transition connector (4)
Glass bead weld connects or the mode of thermal structure glue sticking and transition connector (4) are sealed fixation.
5. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
Be: the metal sleeve (1) is selected using any one in stainless steel tube, copper pipe, nickel alloy pipe, the length is 0.2~
5mm, internal diameter are 0.3~0.9mm, and outer diameter is 0.5~1.5mm.
6. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
It is: the stainless steel welded plug of cylinder that the top plug (3) uses outer diameter as 0.6~1.6mm.
7. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
Be: the armored fiber optic sheath (5) uses stainless steel flexible hose armored fiber optic sheath, and internal diameter is 0.5~1.5mm, and outer diameter is
0.9~2.5mm.
8. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
Be: the measuring point mark (7) is that the endpoint being fixed on top plug (3) using optical fiber and temperature sensitive measuring point (2) passes through as origin
Graduated scale measures distance of each temperature sensitive measuring point apart from origin on optical fiber, is indicated in the external equidistant position of metal sleeve (1).
9. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, feature
Be: the temperature test range of the optical fiber and temperature sensitive measuring point (2) is -50~1000 DEG C, and the optical fiber and temperature sensitive measuring point (2) are set
Transition tail optical fiber (6) length of helical form or cyclic bending shape in transition connector (4) was added not less than the tediously long amount of optical fiber
Cross the sum of connector (4) length.
10. the pinpoint fibre optic temperature sensor encapsulating structure of a kind of multi-measuring point according to claim 1 or 2, special
Sign is: the optical fiber and temperature sensitive measuring point (2) select polyimide coating or silica fibre or femto-second laser quarter without coating
The II type optical fiber and temperature sensitive measuring point array of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920728420.XU CN209727306U (en) | 2019-05-20 | 2019-05-20 | The pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920728420.XU CN209727306U (en) | 2019-05-20 | 2019-05-20 | The pinpoint fibre optic temperature sensor encapsulating structure of multi-measuring point |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111311870A (en) * | 2020-02-25 | 2020-06-19 | 中国矿业大学(北京) | Coal pile spontaneous combustion monitoring method and prevention and control system |
-
2019
- 2019-05-20 CN CN201920728420.XU patent/CN209727306U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111311870A (en) * | 2020-02-25 | 2020-06-19 | 中国矿业大学(北京) | Coal pile spontaneous combustion monitoring method and prevention and control system |
| CN111311870B (en) * | 2020-02-25 | 2021-06-22 | 中国矿业大学(北京) | Coal pile spontaneous combustion monitoring method and prevention and control system |
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