CN209085812U - A kind of unidirectional strain transducer of fiber grating - Google Patents
A kind of unidirectional strain transducer of fiber grating Download PDFInfo
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- CN209085812U CN209085812U CN201821084621.2U CN201821084621U CN209085812U CN 209085812 U CN209085812 U CN 209085812U CN 201821084621 U CN201821084621 U CN 201821084621U CN 209085812 U CN209085812 U CN 209085812U
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Abstract
The utility model discloses a kind of unidirectional strain transducers of fiber grating, the unidirectional strain transducer of fiber grating provided by the embodiment of the utility model, it include there is the temperature-compensating sensing module of temperature-compensating and with the strain sensor modules for carrying out desensitization function to fiber grating, the fixed fiber grating region of tricyclic desensitization substrate in strain sensor modules therein uses tricyclic parallel construction, in this way, when carrying out stress monitoring using the unidirectional strain transducer of fiber grating provided by the embodiment of the utility model, it is achieved that the desensitization design and Design of Temperature Compensation to fiber grating, structure is simple, it improves monitoring sensitivity and improves range.
Description
Technical field
The utility model relates to the stress monitoring technology of object, in particular to a kind of fiber grating list for stress monitoring
To strain transducer.
Background technique
Fiber grating (FBG) sensor belongs to one kind of fibre optical sensor, and the sensing process based on fiber grating passes through outer
Boundary's physical parameter obtains heat transfer agent to the modulation of optical fiber Bragg (Bragg) wavelength, is a kind of wavelength modulation type optical fiber biography
Sensor.Fiber-optic grating sensor can be fitted in realize the physical quantitys such as the temperature for treating geodesic structure, and strain on geodesic structure
Direct measurement.Fiber-optic grating sensor can be divided into fiber grating temperature sensor and fiber grating strain sensor according to type
Device.Fiber-optic grating sensor conduct is with the fastest developing speed in recent years, using extremely wide one of fiber optic passive device, with tradition
Electric signal class sensor is compared, with structure is simple, good reliability, corrosion-resistant, anti-electromagnetic interference capability is strong and multiplexing capacity is strong
The advantages that, the sensing network of a variety of connection types can be formed, the large area measurement and multimetering for treating geodesic structure are realized.By
Have many irreplaceable superiority in fiber-optic grating sensor itself, therefore by more and more researchers and engineering
The favor of technical staff.
Stress monitoring technology to geodesic structure generally all apply structure is more complicated, range of strain is larger, to knot to be measured
The relatively high field of construction system stability requirement, so increasing range, increasing structural system stability to be measured and simplifying encapsulation work
Skill is in fiber Bragg grating strain sensor research firstly the need of solving the problems, such as.But fiber Bragg grating strain sensor is adopted
The range of strain of fiber grating long-term work is ± 2000 μ ε, and well below to range of strain needed for geodesic structure, this is just
Need to carry out fiber Bragg grating strain sensor desensitization design to reach demand.Currently, there are two types of fiber Bragg grating strain sensors
Design scheme: one is the fiber Bragg grating strain sensor of base slice structure, sensitivity coefficient is 1.05pm/ μ ε, the linearity
About 0.99, sensitivity and the linearity are still reached to less than to needed for geodesic structure；The second is the optical fiber of spiral inclination composite construction
Bragg optical grating strain sensor cleverly carries out desensitization to the strain of optical fiber therein in structure, but structure is complicated not
It is easy to accomplish.
Above two fiber Bragg grating strain sensor is applied when on the large range measuring when geodesic structure, and one is the linearity
And sensitive precision is to be improved, one is that structure is complicated, is not easy to implement and higher cost.Therefore, currently without a kind of both structures
The simple fiber Bragg grating strain sensor presence that can be improved range and monitoring sensitivity again.
Utility model content
One embodiment of the utility model provides a kind of unidirectional strain transducer of the fiber grating for stress monitoring,
Structure is simple and can be improved monitoring sensitivity and improves range.
The utility model embodiment is achieved in that
The unidirectional strain transducer of a kind of fiber grating applied to stress monitoring, comprising: strain sensor modules, temperature are mended
It repays sensing module, sensor base plate, sensor protecting case and optical fiber cable composition, strain sensor modules and is welded in sensor
Among bottom plate, upper part is equipped with temperature-compensating sensing module, and sensor protecting case is completely covered temperature-compensating sensing module, answers
Become sensor module and sensor base plate, wherein
The optical fiber cable includes intermediate grating, the optical fiber loose tube at grating both ends and the armored pipes of two side ends；
Strain sensor modules include tricyclic desensitization substrate and the sensor being connected respectively with tricyclic desensitization substrate both ends weldering
Block, the grating are encapsulated on the first groove of tricyclic desensitization substrate, in the first groove direction of the tricyclic desensitization substrate,
Be uniformly distributed three ring structures in parallel, the armored pipes are fixed on the sensor welding block and sensor welding block be welded in
Geodesic structure surface；
The temperature-compensating sensing module includes temperature-compensating substrate and the temperature that connect with temperature-compensating substrate one end
Degree compensation substrate, the temperature-compensating substrate are fixed on the sensor welding block, are equipped with second in the temperature-compensating substrate
Groove places the exposed grating, the third groove that the second groove both ends extending direction of the temperature-compensating substrate is equipped with respectively
Place the optical fiber loose tube, the 4th groove on the temperature-compensating substrate along the extending direction of the third groove places institute
State armored pipes.
As above as it can be seen that the unidirectional strain transducer of fiber grating provided by the embodiment of the utility model, includes with temperature
The temperature-compensating sensing module of compensation and with to fiber grating carry out desensitization function strain sensor modules, strain therein
The fixed fiber grating region of tricyclic desensitization substrate in sensor module uses tricyclic parallel construction, in this way, using this reality
When carrying out stress monitoring with the unidirectional strain transducer of fiber grating that new embodiment provides, it is achieved that and fiber grating is subtracted
Quick design and Design of Temperature Compensation, structure is simple, improves monitoring sensitivity and improves range.
Detailed description of the invention
Fig. 1 is the totality of the unidirectional strain transducer of the fiber grating provided by the embodiment of the utility model for stress monitoring
Structural schematic diagram；
Fig. 2 is the structural schematic diagram of strain sensor modules provided by the embodiment of the utility model；
Fig. 3 is the tricyclic desensitization schematic diagram of substrate structure in strain sensor modules provided by the embodiment of the utility model；
Fig. 4 is the welding block structural schematic diagram in strain sensor modules provided by the embodiment of the utility model；
Fig. 5 is the optical cable fixing block structural schematic diagram in strain sensor modules provided by the embodiment of the utility model；
Fig. 6 is temperature-compensating sensing module structural schematic diagram provided by the embodiment of the utility model；
Fig. 7 is sensor base plate structural schematic diagram provided by the embodiment of the utility model；
Fig. 8 is sensor protection shell structure schematic diagram provided by the embodiment of the utility model.
Appended drawing reference
1- strain sensor modules
101- tricyclic desensitization substrate
The first dististyle of 1011-
The second dististyle of 1012-
The first ring bodies of 1013-
The second ring bodies of 1014-
1015- third ring bodies
The first connection sheet of 1016-
The second connection sheet of 1017-
102- sensor welding block
5 fixed block of 103- optical fiber cable
2- temperature-compensating sensing module
201- temperature-compensating substrate
202- temperature-compensating substrate
3- sensor base plate
33- sensor base plate welds frame
31- optical cable fixing block
4- sensor protecting case
5- optical fiber cable
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
When the utility model embodiment carries out stress monitoring for the unidirectional strain transducer of fiber grating in offer, realize
Desensitization design and Design of Temperature Compensation to fiber grating, include the temperature-compensating sensing module and tool with temperature-compensating
There are the strain sensor modules that desensitization function is carried out to fiber grating, the tricyclic desensitization substrate in strain sensor modules therein
Fixed fiber grating region uses tricyclic parallel construction.In this way, fiber grating provided by the embodiment of the utility model is unidirectionally answered
It is simple to become sensor structure, improve monitoring sensitivity and improves range.
Further, the unidirectional strain transducer of fiber grating provided by the embodiment of the utility model is in application fiber grating
Physical parameter measurement result monitors when the stress of geodesic structure, and measurement is to the unidirectional stress of geodesic structure, so being referred to as
The unidirectional strain transducer of fiber grating.
Fig. 1 is the totality of the unidirectional strain transducer of the fiber grating provided by the embodiment of the utility model for stress monitoring
Structural schematic diagram, comprising: strain sensor modules 1, temperature-compensating sensing module 2, sensor base plate 3, sensor protecting case 4
And optical fiber cable 5 forms, strain sensor modules 1 are welded among sensor base plate 3, and upper part is equipped with temperature-compensating sensing mould
Temperature-compensating sensing module 2, strain sensor modules 1 and sensor base plate 3 is completely covered in block 2, sensor protecting case 4,
In,
The optical fiber cable 5 includes intermediate nuditing fiber, the optical fiber loose tube at nuditing fiber both ends and two side ends
Armored pipes；
Strain sensor modules 1 include tricyclic desensitization substrate 101 and the biography being connected respectively with 101 both ends of tricyclic desensitization substrate
Sensor welding block 102, the nuditing fiber are encapsulated on the first groove of tricyclic desensitization substrate 101, in the tricyclic desensitization substrate
In 101 the first groove direction, it is uniformly distributed three ring structures in parallel, the armored pipes are fixed on the sensor welding block
On 102 and sensor welding block 102 is welded in body structure surface to be measured；
The temperature-compensating sensing module 2 includes temperature-compensating substrate 201 and connects with described 201 one end of temperature-compensating substrate
The temperature-compensating substrate 202 connect, the temperature-compensating substrate 202 are fixed on the sensor welding block 102, the temperature-compensating
It is equipped with the second groove in substrate 201 and places the nuditing fiber, the second groove both ends extension side of the temperature-compensating substrate 201
The optical fiber loose tube is placed to the third groove that is equipped with respectively, along the third groove on the temperature-compensating substrate 202
4th groove of extending direction places the armored pipes.
In this configuration, the optical fiber cable 5 from inside to outside, is made of nuditing fiber, optical fiber loose tube and armored pipes,
The strain sensor modules 1 and temperature-compensating sensing module 2 secure the optical fiber cable 5, the intermediate setting of nuditing fiber
There is fiber grating area.In monitoring when geodesic structure, fiber grating is arranged on the unidirectional strain transducer of the fiber grating, institute
It states the unidirectional strain transducer of fiber grating and is welded on body structure surface to be measured, deform to geodesic structure and drive the fiber grating list
Fiber grating on strain transducer deforms, and measurement obtains the center wavelength variation amount of fiber grating, according to middle cardiac wave
Long variable quantity determines the strain occurred to geodesic structure.
Fig. 2 is the structural schematic diagram of strain sensor modules provided by the embodiment of the utility model, strain sensor modules 1
It is solid including tricyclic desensitization substrate 101, the sensor welding block 102 being respectively connected with 101 both ends of tricyclic desensitization substrate and optical fiber cable 5
Determine block 103.101 structural schematic diagram of tricyclic desensitization substrate as shown in connection with fig. 3,102 structural representation of sensor welding block shown in Fig. 4
Figure and 5 fixed block of optical fiber cable shown in fig. 5,103 structural schematic diagram, pair of strain sensors module are described in detail.
As shown in figure 3, tricyclic desensitization substrate 101 by the first dististyle 1011, the second dististyle 1012, the first ring bodies 1013,
Second ring bodies 1014, third ring bodies 1015, the first connection sheet 1016 and the second connection sheet 1017 are integrally formed, wherein the
One ring bodies 1013 close to the first dististyle 101, the second ring bodies 1014 close to the second dististyle 1012, the first ring bodies 1013 with
The centre of second ring bodies 1014 is equipped with third ring bodies 1015, passes through the first connection sheet 1016 and the first ring bodies 1013 respectively
Connection, is connect by the second connection sheet 1017 with the second ring bodies 1014, the first ring bodies 1013, the second ring bodies 1014 and the
The axial direction of three ring bodies 1015 is vertical with the plane of the first connection sheet 1016 and the second connection sheet 1017.First connection sheet, 1016 He
It is equipped with the first groove in second connection sheet 1017, to place exposed fiber grating, is symmetrical with third ring bodies in the first groove
1015 two circular holes of setting, the grid region in exposed fiber grating is fixed between two circular holes；In the first dististyle 1011 and second
Dististyle 1012, which is symmetrical with first groove, which sets 6, threaded hole, is overlapped with the threaded hole being equipped with sensor welding block 102, uses
The tricyclic desensitization substrate 101 is fixed on sensor welding block 102 by screw.
In this configuration, described two circular holes can prevent glue from penetrating into grid region, and the first ring bodies 1013, the second ring
Shape body 1014, third ring bodies 1015 can play hyposensitization, when deformation occurs for the structure of geodesic structure, three ring bodies
It is able to bear most of deformation, and the grid region between two circular holes is only by lesser deformation, to increase range.Optical fiber light
The range of strain of grid long-term work is ± 2000 μ ε, by finite element analysis and theoretical calculation, using the utility model embodiment
The sensor of offer, the desensitization ratio that three ring bodies provide are 2.9, also ensure the utility model significantly while guaranteeing desensitization
The precision for the sensor that embodiment provides, and the range of strain that its material can be born in elastic range is ± 5000 μ ε.
As shown in figure 4, being equipped with first be overlapped with the threaded hole of the tricyclic desensitization substrate 101 on sensor welding block 102
The tricyclic desensitization substrate 101 is fixed on sensor welding block 102 by threaded hole using screw；Also it is equipped with the fixed temperature
Compensate the second threaded hole of sensing module 2, and the third threaded hole of fixed 5 fixed block of optical fiber cable；The tricyclic subtracts
First groove of quick substrate 101 extends and successively extends to the first sub- groove and the second sub- groove in sensor welding block 102,
In, the extension of the first groove places nuditing fiber, and the first sub- groove places optical fiber loose tube, and the second sub- groove is placed in armouring
Pipe.In this way, the radius size of the second sub- groove is identical as the radius size of the armored pipes.Solves tricyclic desensitization substrate 101
Material special the problem of being difficult to solder to sensor welding block 102.
As shown in figure 5,5 fixed block 103 of optical fiber cable has for placing the tongue of the armored pipes and in tongue
Two sides are symmetrical arranged threaded hole, wherein the threaded hole is overlapped with the third threaded hole on sensor welding block 102, so that will
Sensor welding block 102 and 5 fixed block 103 of the optical fiber cable are adopted and are screwed, and the armored pipes, the placement armouring are pushed down
The tongue radius size of pipe is identical as the radius size of the armored pipes.
As shown in fig. 6, the second groove two sides in the temperature-compensating substrate 201 are symmetricly set on the temperature-compensating base
First threaded hole of piece 201, and in the second threaded hole of temperature-compensating substrate 202, two threaded holes are overlapped, it will be warm using screw
Degree compensation substrate 201 and temperature-compensating substrate 202 are fixed.It is arranged on the outside of the second threaded hole of the temperature-compensating substrate 202
There is third threaded hole, to be overlapped with the second threaded hole of sensor welding block 102, using screw by the temperature-compensating substrate 202
It is fixed with sensor welding block 102.Herein, the principle of the temperature-compensating sensing module 2 be by strain transducer by
Cause the wavelength shift of fiber grating to be rejected in temperature influence, therefore, by the setting of the material of the temperature-compensating substrate 201 and
The material of tricyclic desensitization substrate 101 is identical, and the thermal expansion coefficient to guarantee the two is identical.In this way due to hot temperature expansion mismatch pair
As a result error influences to cancel out each other when calculating, it is ensured that the accuracy of measurement result.Further, the temperature-compensating
Substrate 201 is fixed together by temperature-compensating substrate 202 with sensor welding block 102 using the structure of cantilever beam, thus
Not by the effect of extraneous stress, when testee is curved surface or vertical plane, the advantage of this buffer-type design structure is
It can be improved position of centre of gravity, reduce the influence of material self gravity, can apply the extraneous environmental loads the case where.It simultaneously can also
To reduce the area of the unidirectional strain transducer of entire fiber grating, increase institute's application space.
As shown in fig. 7, Fig. 7 is sensor base plate structural schematic diagram provided by the embodiment of the utility model.Wherein, sensor
Bottom plate 3 welds frame 33 by sensor base plate and optical cable fixing block 31 forms, and the sensor base plate weldering frame 33 is welded in the strain and passes
1 periphery of sensor module is arranged fluted and optical cable fixing block 31 is provided with tongue in the armored pipes discrepancy position of fiber grating,
Set groove and the tongue cooperate, the armored pipes of fixed grating optical cable.In the tongue two sides pair of optical cable fixing block 31
Claim setting threaded hole to be overlapped in the symmetrically arranged threaded hole of groove of sensor base plate weldering frame 33, is adopted by the threaded hole of coincidence
It is screwed sensor base plate weldering frame 33 and optical cable fixing block 31, the aperture and fiber grating of the groove and the tongue
The aperture of armored pipes is consistent.In this manner it is possible to by the armored pipes of grating optical cable and sensor base plate 3 securely fix together, with
Exempt to slide.Sensor base plate weldering frame 33 on be also equipped with several for using screw and sensor protection shell 4 fixation screw thread
Hole, in case the unidirectional strain transducer of fiber grating is by external world.
Fig. 8 is sensor protection shell structure schematic diagram provided by the embodiment of the utility model, wherein is protected in the sensor
In shell structure 4, be provided with several for use screw and the fixation of sensor base plate 3 threaded hole, and in fiber grating
Armored pipes enter and leave position and are equipped with tongue, and aperture is consistent with the aperture of the armored pipes of fiber grating, so that the armored pipes of fiber grating
It can enter and leave.The threaded hole can be set the frame edge in the sensor protection shell structure 4 and be uniformly distributed.
From the above, it can be seen that the unidirectional strain transducer of fiber grating provided by the embodiment of the utility model include with
Lower advantage:
1) size is small: the size after the sensor encapsulation is 79*38*29mm, and size is small to mean the sensor sheet
A possibility that influence of the body to monitoring object is small, and it is by accidental destruction is small；
2) range is big: the range of strain for the fiber grating long-term work that fiber Bragg grating strain sensor uses is ± 2000 μ
ε, and sensor provided by the utility model is used, due to being provided with tricyclic desensitization substrate 1, the elasticity modulus of material is small, bends
It takes that stress is big, the range of the sensor is enabled to reach ± 5000 μ ε；It substantially increases the range of the sensor and answers
Use range；
3) precision is high: sensor provided by the utility model is used, due to being provided with tricyclic desensitization substrate 11, desensitization coefficient
Suitably, so that the precision of the sensor improves；
4) temperature-compensating: using sensor provided by the utility model, realizes due to being provided with temperature-compensating sensing module 2
Temperature-compensating, so improving the precision of engineer application；
5) long-time stability and service life are high: due to the tricyclic desensitization substrate 11 in sensor provided by the utility model and passing
The connection type of sensor welding block uses screw connection, and there is no the long-term creeps and aging that occur when existing organic mode
Problem, it is more stable reliable when working long hours, and service life greatly improves；
6) the simple and reliable property of mounting process is high: since mounting process uses argon arc welding, mounting process is simple, does not need
Complicated processing is carried out to face of weld, also avoid as be surface-treated it is not in place caused by installation question.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent substitution, improvement and etc. done should be included in the utility model
Within the scope of protection.
Claims (8)
1. a kind of unidirectional strain transducer of fiber grating applied to stress monitoring characterized by comprising strain transducer mould
Block (1), temperature-compensating sensing module (2), sensor base plate (3), sensor protecting case (4) and optical fiber cable (5) composition, are answered
Become sensor module (1) to be welded among sensor base plate (3), upper part is equipped with temperature-compensating sensing module (2), and sensor is protected
Temperature-compensating sensing module (2), strain sensor modules (1) and sensor base plate (3) is completely covered in shield shell (4), wherein
The optical fiber cable (5) includes intermediate grating, the optical fiber loose tube at grating both ends and the armored pipes of two side ends；
Strain sensor modules (1) include tricyclic desensitization substrate (101) and are connected respectively with tricyclic desensitization substrate (101) both ends
Sensor welding block (102), the grating are encapsulated on the first groove of tricyclic desensitization substrate (101), in the tricyclic desensitization base
In first groove direction of piece (101), it is uniformly distributed three ring structures in parallel, the armored pipes are fixed on the sensor weldering
On block (102) and sensor welding block (102) is welded in body structure surface to be measured；
The temperature-compensating sensing module (2) include temperature-compensating substrate (201) and with described temperature-compensating substrate (201) one end
The temperature-compensating substrate (202) of connection, the temperature-compensating substrate (202) is fixed on the sensor welding block (102), described
It is equipped with the second groove in temperature-compensating substrate (201) and places the grating, the second groove two of the temperature-compensating substrate (201)
The extending direction third groove that is equipped with respectively in end places the optical fiber loose tube, along described on the temperature-compensating substrate (202)
4th groove of the extending direction of third groove places the armored pipes.
2. sensor as described in claim 1, which is characterized in that tricyclic desensitization substrate (101) is by the first dististyle (1011),
Two dististyles (1012), the first ring bodies (1013), the second ring bodies (1014), third ring bodies (1015), the first connection sheet
(1016) and the second connection sheet (1017) is integrally formed, wherein
First ring bodies (1013) is close second dististyle (1012) close to the first dististyle (1011), the second ring bodies (1014),
The centre of first ring bodies (1013) and the second ring bodies (1014) is equipped with third ring bodies (1015), passes through the first connection respectively
Piece (1016) is connect with the first ring bodies (1013), is connect by the second connection sheet (1017) with the second ring bodies (1014), the
One ring bodies (1013), the axial direction of the second ring bodies (1014) and third ring bodies (1015) and the first connection sheet (1016) and the
The plane of two connection sheets (1017) is vertical, is equipped with the first groove in the first connection sheet (1016) and the second connection sheet (1017), with
Exposed fiber grating is placed, third ring bodies (1015) is symmetrical in the first groove and two circular holes is set, by exposed optical fiber light
Grid region in grid is fixed between two circular holes；First groove is symmetrical in the first dististyle (1011) and the second dististyle (1012)
It is equipped with threaded hole, is overlapped with the threaded hole being equipped with sensor welding block (102), using screw by the tricyclic desensitization substrate
(101) it is fixed on sensor welding block (102).
3. sensor as described in claim 1, which is characterized in that be equipped with and the tricyclic on the sensor welding block (102)
The first threaded hole that the threaded hole of desensitization substrate (101) is overlapped, is fixed on biography for the tricyclic desensitization substrate (101) using screw
On sensor welding block (102)；
The sensor welding block (102) is also equipped with the second threaded hole of the fixed temperature-compensating sensing module (2), and fixed institute
State the third threaded hole of optical fiber cable (5) fixed block；First groove of the tricyclic desensitization substrate (101) is in sensor welding block
(102) extend and successively extend to the first sub- groove and the second sub- groove, wherein the extension of the first groove places exposed light
Fine, the first sub- groove places optical fiber loose tube, and the second sub- groove is placed in armored pipes.
4. sensor as claimed in claim 3, which is characterized in that the strain sensor modules (1) further include optical fiber cable
(5) fixed block (103) have the tongue for placing the armored pipes and are symmetrical arranged threaded hole in tongue two sides, wherein institute
It states threaded hole to be overlapped with the third threaded hole on sensor welding block (102), by sensor welding block (102) and the optical fiber cable
(5) fixed block (103), which is adopted, is screwed.
5. sensor as described in claim 3 or 4, which is characterized in that the second groove in the temperature-compensating substrate (201)
Two sides are symmetricly set on the first threaded hole of the temperature-compensating substrate (201), and the second spiral shell in temperature-compensating substrate (202)
Pit, two threaded holes are overlapped, using screw that temperature-compensating substrate (201) and temperature-compensating substrate (202) is fixed；
The temperature-compensating substrate (202) the second threaded hole on the outside of be provided with third threaded hole, with sensor welding block
(102) the second threaded hole is overlapped, and is consolidated the temperature-compensating substrate (202) and sensor welding block (102) using screw
It is fixed.
6. sensor as described in claim 1, which is characterized in that the material and tricyclic of the temperature-compensating substrate (201) subtract
The material of quick substrate (101) is identical.
7. sensor as described in claim 1, which is characterized in that sensor base plate (3) by sensor base plate weldering frame (33) and
Optical cable fixing block (31) composition, sensor base plate weldering frame (33) is welded in the strain sensor modules (1) periphery, in optical fiber
It is fluted and optical cable fixing block (31) is provided with tongue that the armored pipes of optical cable (5) enter and leave position setting, the groove and described
Tongue is integrally formed the fixed armored pipes；
Threaded hole is symmetrical arranged in the tongue two sides of optical cable fixing block (31) and the groove in sensor base plate weldering frame (33) is symmetrical
The threaded hole of setting is overlapped, and is adopted by the threaded hole of coincidence and is screwed sensor base plate weldering frame (33) and optical cable fixing block
(31)；Several are also equipped in sensor base plate weldering frame (33) to use screw and sensor protecting case (4) to fix
Threaded hole.
8. sensor as described in claim 1, which is characterized in that be equipped with several use in the sensor protecting case (4)
In the threaded hole fixed using screw and sensor base plate (3), and optical fiber cable (5) armored pipes enter and leave position be equipped with it is convex
Slot.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084621.2U CN209085812U (en) | 2018-07-10 | 2018-07-10 | A kind of unidirectional strain transducer of fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084621.2U CN209085812U (en) | 2018-07-10 | 2018-07-10 | A kind of unidirectional strain transducer of fiber grating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001800A1 (en) | 2020-07-03 | 2022-01-06 | 维宁尔瑞典公司 | Electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022001800A1 (en) | 2020-07-03 | 2022-01-06 | 维宁尔瑞典公司 | Electronic device |
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