CN215447785U - High-stability fiber grating steel strain sensor - Google Patents
High-stability fiber grating steel strain sensor Download PDFInfo
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- CN215447785U CN215447785U CN202122137173.6U CN202122137173U CN215447785U CN 215447785 U CN215447785 U CN 215447785U CN 202122137173 U CN202122137173 U CN 202122137173U CN 215447785 U CN215447785 U CN 215447785U
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Abstract
The utility model relates to the technical field of optical fiber sensing, in particular to a high-stability fiber grating steel strain sensor, which solves the problems of unstable and inaccurate data, no shock resistance, no falling resistance, low protection level and certain requirements on transportation environment, installation environment and use environment caused by temperature sensitivity and large temperature drift in the prior art. The utility model provides a high stability type fiber grating steel strain transducer, includes bare fiber, and bare fiber's outer lane is provided with sensitization elastic beam, and the outer lane of sensitization elastic beam is provided with the stress grating, and the outer lane of stress grating is provided with the stainless steel pillar. The fiber core of the sensor adopts the sensitization elastic beam with extremely low thermal expansion coefficient and is matched with the temperature compensation stress grating, so that the interference of temperature to the fiber grating sensor is fundamentally eliminated, and meanwhile, the stainless steel protective pipe is additionally arranged on the outermost layer to resist most external force impact, prevent water and dust and ensure that the fiber grating is not polluted and stably operates.
Description
Technical Field
The utility model relates to the technical field of optical fiber sensing, in particular to a high-stability fiber grating steel strain sensor.
Background
Since the last century, the optical fiber sensing technology has been continuously advanced, and the fiber grating sensor developed from the fiber grating sensor has emerged internationally, and becomes a novel basic device with communication, sensing, information processing and other technologies. Compared with the conventional electronic and mechanical sensors, the fiber grating sensor has a series of unique points; small volume and light weight. When the fiber grating sensor is embedded in the structure or arranged on the surface of the structure, the influence on the performance of the monitored structure is small; high measurement precision and wide transmission frequency band. The value measured by the fiber grating sensor is an absolute value, so that the measurement precision is improved; good electrical insulation and anti-electromagnetic interference. The fiber itself is made of silica material and is a good insulator.
However, the fiber grating strain sensor currently used in the market generally has the following disadvantages: the temperature sensor is sensitive to temperature, the temperature drift is large, data are unstable and inaccurate, the data are not resistant to earthquake and fall, the protection level is not high, and certain requirements are met on a transportation environment, an installation environment and a use environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-stability fiber grating steel strain sensor, which solves the problems of unstable and inaccurate data, no shock resistance, no falling resistance, low protection level and certain requirements on transportation environment, installation environment and use environment caused by temperature sensitivity and large temperature drift in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a high stability type fiber grating steel strain transducer, includes bare fiber, bare fiber's outer lane is provided with sensitization elastic beam, sensitization elastic beam's outer lane is provided with stress grating, stress grating's outer lane is provided with the stainless steel pillar, the outer lane of stainless steel pillar is provided with the steel body, the mesopore with bare fiber looks adaptation is seted up to the inside of sensitization elastic beam.
Preferably, the outer ring of the bare fiber is adhered to the inner ring of the sensitization elastic beam through composite viscose.
Preferably, the outer ring of the sensitization elastic beam is adhered to the inner ring of the stress grating through composite adhesive.
Preferably, the joints of the bare optical fiber, the sensitization elastic beam and the stress grating are all provided with notches for adhesion.
Preferably, the stainless steel protective pipe is sleeved on the outer ring of the stress grating.
Preferably, the steel body is sleeved on the outer ring of the stainless steel protective pipe.
The utility model has at least the following beneficial effects:
the fiber core of the sensor is the core of the fiber grating sensor by the arrangement of the sensitization elastic beam, the stress grating and the stainless steel protective tube, the fiber core of the sensor adopts the sensitization elastic beam with extremely low thermal expansion coefficient and is matched with the stress grating with temperature compensation, the interference of temperature to the fiber grating sensor is fundamentally eliminated, meanwhile, the sensitization elastic beam of the sensor adopts an integrated design, the middle part is hollow, a bare fiber passes through the middle part, the bare fiber and the sensitization elastic beam are bonded into a whole by composite viscose, the bonding part adopts groove cutting treatment to form a notch, the bonding surface of the glue and the sensitization elastic beam is increased, and the bonding force is increased; and the stainless steel protective tube is additionally arranged on the outermost layer, so that most of external force impact is resisted, and the fiber grating is waterproof and dustproof, so that the fiber grating is not polluted and stably operates.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a bare optical fiber according to the present invention.
In the figure: 1. a steel body; 2. a notch; 3. compounding viscose glue; 4. a stress grating; 5. a stainless steel protective tube; 6. sensitizing an elastic beam; 7. a bare optical fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, a high-stability fiber grating steel strain sensor comprises a bare fiber 7, a sensitization elastic beam 6 is arranged on the outer ring of the bare fiber 7, a stress grating 4 is arranged on the outer ring of the sensitization elastic beam 6, a stainless steel protective tube 5 is arranged on the outer ring of the stress grating 4, a steel body 1 is arranged on the outer ring of the stainless steel protective tube 5, a mesopore matched with the bare fiber 7 is arranged inside the sensitization elastic beam 6, specifically, through the arrangement of the sensitization elastic beam 6, the stress grating 4 and the stainless steel protective tube 5, a fiber core is the core of the fiber grating sensor, the fiber core of the sensor adopts the sensitization elastic beam 6 with extremely low thermal expansion coefficient and is matched with the stress grating 4 with temperature compensation, the interference of temperature to the fiber grating sensor is fundamentally eliminated, meanwhile, the sensitization elastic beam 6 of the sensor adopts an integrated design and is hollow in the middle, the bare fiber 7 passes through the middle part, the bare optical fiber 7 and the sensitization elastic beam 6 are adhered into a whole by the composite adhesive 3, the adhesive part is processed by grooving to form a notch 2, the bonding surface of the adhesive and the sensitization elastic beam 6 is increased, and the bonding force is increased; and install stainless steel protective tube 5 additional at the outmost, keep out most external force impact, waterproof dustproof, make fiber grating not receive the pollution steady operation.
The scheme has the following working processes:
through the arrangement of the sensitization elastic beam 6, the stress grating 4 and the stainless steel protective tube 5, a fiber core is the core of the fiber grating sensor, the fiber core of the sensor adopts the sensitization elastic beam 6 with extremely low coefficient of thermal expansion and is matched with the stress grating 4 with temperature compensation, the interference of temperature to the fiber grating sensor is fundamentally eliminated, meanwhile, the sensitization elastic beam 6 of the sensor adopts an integrated design, the middle part is hollow, a bare fiber 7 passes through the middle part, the bare fiber 7 and the sensitization elastic beam 6 are bonded into a whole by a composite adhesive 3, the bonding part adopts a cutting groove treatment to form a notch 2, the bonding surface of glue and the sensitization elastic beam 6 is increased, and the bonding force is increased; and install stainless steel protective tube 5 additional at the outmost, keep out most external force impact, waterproof dustproof, make fiber grating not receive the pollution steady operation.
According to the working process, the following steps are known:
the fiber core of the sensor adopts a sensitization elastic beam 6 with extremely low thermal expansion coefficient and is matched with a temperature compensation stress grating 4, so that the interference of temperature to the fiber grating sensor is fundamentally eliminated, and meanwhile, the stainless steel protective tube 5 is additionally arranged on the outermost layer to resist most external force impact, prevent water and dust, and ensure that the fiber grating is not polluted and stably operates.
Further, the outer ring of the bare fiber 7 is adhered to the inner ring of the sensitization elastic beam 6 through the composite adhesive 3, and particularly, the connection stability is improved through the arrangement of the composite adhesive 3.
Furthermore, the outer ring of the sensitization elastic beam 6 is adhered to the inner ring of the stress grating 4 through the composite viscose 3, and particularly, the interference of temperature to the fiber grating sensor is fundamentally eliminated through the arrangement of the stress grating 4.
Further, the notch 2 that is used for the adhesion is all offered to the junction of bare fiber 7, sensitization elastic beam 6 and stress grating 4, and is concrete, and through the setting of notch 2, the sticky department adopts the grooving to handle, forms notch 2, increases the faying surface of glue and sensitization elastic beam 6, increase cohesion.
Further, stainless steel pillar 5 cup joints in the outer lane of stress grating 4, and is concrete, through stainless steel pillar 5's setting, supports most external force impact, and is waterproof dustproof, makes fiber grating not receive the pollution steady operation.
Further, the steel body 1 is sleeved on the outer ring of the stainless steel protective pipe 5.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a high stability type fiber grating steel strain transducer, includes bare fiber (7), its characterized in that, the outer lane of bare fiber (7) is provided with sensitization elastic beam (6), the outer lane of sensitization elastic beam (6) is provided with stress grating (4), the outer lane of stress grating (4) is provided with stainless steel pillar (5), the outer lane of stainless steel pillar (5) is provided with steel body (1), the mesopore with bare fiber (7) looks adaptation is seted up to the inside of sensitization elastic beam (6).
2. The high-stability fiber grating steel strain sensor according to claim 1, wherein the outer ring of the bare fiber (7) is adhered to the inner ring of the sensitivity-enhanced elastic beam (6) through the composite adhesive (3).
3. The high-stability fiber grating steel strain sensor according to claim 2, wherein the outer ring of the sensitivity-enhanced elastic beam (6) is adhered to the inner ring of the stress grating (4) through a composite adhesive (3).
4. The high-stability fiber grating steel strain sensor according to claim 3, wherein the joints of the bare fiber (7), the sensitivity-enhanced elastic beam (6) and the stress grating (4) are provided with notches (2) for adhesion.
5. The high-stability fiber grating steel strain sensor according to claim 1, wherein the stainless steel protective tube (5) is sleeved on the outer ring of the stress grating (4).
6. The high-stability fiber grating steel strain sensor according to claim 1, wherein the steel body (1) is sleeved on an outer ring of the stainless steel protective tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137173.6U CN215447785U (en) | 2021-09-06 | 2021-09-06 | High-stability fiber grating steel strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137173.6U CN215447785U (en) | 2021-09-06 | 2021-09-06 | High-stability fiber grating steel strain sensor |
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| Publication Number | Publication Date |
|---|---|
| CN215447785U true CN215447785U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122137173.6U Active CN215447785U (en) | 2021-09-06 | 2021-09-06 | High-stability fiber grating steel strain sensor |
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| CN (1) | CN215447785U (en) |
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2021
- 2021-09-06 CN CN202122137173.6U patent/CN215447785U/en active Active
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