High-temperature-resistant fiber bragg grating strain sensor installed on steel surface
By using high-temperature resistant acrylic resin and welded glass fixing on fiber grating sensors, combined with armored casing and stainless steel protective shells, the problem of inaccurate data and easy damage in high temperature environments is solved, and a long-term solution at high temperatures is achieved Reliable monitoring.
Patent Information
- Application Number
- CN202420484362.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-13
AI Technical Summary
Traditional fiber grating strain sensors have poor heat resistance in high-temperature environments, resulting in insufficient data accuracy and are susceptible to electromagnetic interference, making it difficult to achieve long-term monitoring, and lack of high-precision protection devices.
The optical fiber is encapsulated with high temperature resistant acrylic resin, and is fixed with the packaging base through welding glass, plus an armored casing and stainless steel protective case to ensure the stability and durability of the sensor in high temperature environment.
It improves the high temperature resistance and durability of fiber grating sensors, ensures long-term and reliable monitoring in high-temperature environments, and enhances the high-precision monitoring capability of ash bucket.
Smart Images
Figure CN222258153U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical fiber grating sensors, in particular to a high-temperature resistant optical fiber grating strain sensor installed on the surface of steel. Background Art
[0002] With the improvement of environmental protection requirements, the application scale of dust collectors is constantly increasing, and the flue gas treatment capacity of a single dust collector is also improving. The ash hopper is an important component of the dust collector, which is used to temporarily store the dust collected by the dust collector. Full load and overload are one of the main causes of dust collector ash hopper accidents. Therefore, monitoring the dust collector ash hopper is not only of great significance to improving the safety and reliability of the structure, but also can reduce the maintenance cost of the structure, which has objective economic benefits.
[0003] The environment of the electrostatic precipitator is under pressure, with strong electromagnetic fields and high temperatures. The monitoring environment is complex, and the durability of the sensor is the main factor affecting long-term health monitoring. Resistance strain gauges have problems such as poor corrosion resistance, easy breakage, and difficulty in continuous observation, and resistance strain gauges are severely affected by electromagnetic interference. Therefore, the above-mentioned measurement method based on resistance strain data cannot achieve long-term monitoring of the stress transfer length. The monitoring of the ash hopper is a long-term process. At the same time, the outside of the ash hopper wall is covered with insulation cotton and colored corrugated plates. The sensor needs to be protected to ensure long-term monitoring and is not damaged due to ash hopper maintenance. At present, there is still a lack of high-precision long-term monitoring equipment and sensor protection devices for dust collector hoppers.
[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content
[0005] The purpose of the utility model is to provide a high-temperature resistant fiber Bragg grating strain sensor installed on the surface of steel, which solves the problem that the data obtained by the traditional fiber Bragg grating strain sensor is not accurate enough due to its poor heat resistance in a high-temperature environment.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides a high-temperature resistant fiber Bragg grating strain sensor installed on the surface of steel, characterized in that it includes: a packaging base, an optical fiber and an armored sleeve; the optical fiber adopts a high-temperature resistant acrylic resin on the outside of the optical fiber core; the optical fiber is arranged in a fiber positioning groove of the packaging base; an armored sleeve is arranged on the outside of the optical fiber output part; the optical fiber and the packaging base are fixed by welding glass; the packaging base is used for welding on the surface of the steel structure to be monitored.
[0008] Preferably, the utility model also includes: a sensor protection device; the sensor protection device includes: a stainless steel protective shell, a stainless steel pressing sheet, a welding stud and a nut; the welding stud is welded on the surface of the steel structure; the stainless steel protective shell is installed on the welding stud and covered around the packaging base; the stainless steel pressing sheet is sleeved on the welding stud to fix the optical fiber wrapped in the armored sleeve of the fiber output; the nut is tightened on the welding stud to fix the stainless steel protective shell.
[0009] Preferably, the packaging base includes: a central packaging base, an outer packaging base and an annular sensitivity enhancement structure. Optical fiber positioning grooves are arranged on the back of the central packaging base and the outer packaging base, and four electric welding grooves are arranged on the outer packaging base for welding the sensor to the surface of the steel structure.
[0010] Preferably, the armored sleeve is arranged outside the optical fiber, and the armored sleeve is made of high temperature resistant material.
[0011] Preferably, four rounded mounting holes are provided on the surface of the stainless steel protective shell, which is formed by stamping and welding a 2 mm thick plate.
[0012] By adopting the above technical solution, the utility model has the following beneficial effects:
[0013] The fiber grating strain sensor of the utility model is fixed with the packaging base by using welding glass, adding high temperature resistant acrylic resin to the surface of the optical fiber, and the armored sleeve of the optical fiber output is also made of high temperature resistant material, which improves the high temperature resistance of the fiber grating sensor and ensures its long-term use in high temperature environment. The utility model protects the sensor by adding a protective shell on the outside of the fiber grating sensor through welding bolts, thereby increasing the durability of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 A schematic diagram of the structure of a high temperature resistant fiber Bragg grating strain sensor provided by the utility model;
[0016] Figure 2 A schematic diagram of the assembly of a high temperature resistant fiber Bragg grating strain sensor and a sensor protective shell provided by the utility model;
[0017] Figure 3 for Figure 2 The top view shown;
[0018] Figure 4 A schematic diagram of the structure of the optical fiber and armored casing provided by the utility model;
[0019] Figure 5 This is a front schematic diagram of the high temperature resistant fiber Bragg grating strain sensor provided by the utility model;
[0020] Figure 6 This is a schematic diagram of the back side of the high temperature resistant fiber Bragg grating strain sensor provided by the utility model.
[0021] Icons: 1: packaging base; 2: optical fiber; 3: armored casing; 4: stainless steel protective shell; 5: stainless steel pressing sheet; 6: welding stud; 7: nut; 8: steel structure surface; 101: annular sensitization junction; 102: central packaging base; 103: outer packaging base; 104: optical fiber positioning groove; 201: optical fiber core; 202: high temperature resistant acrylic resin; 203: welding glass. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0024] Combination Figures 1 to 6 As shown, this embodiment provides a high-temperature resistant fiber Bragg grating strain sensor installed on the surface of steel, characterized in that it includes: a packaging base 1, an optical fiber 2 and an armored sleeve 3; the optical fiber 2 uses a high-temperature resistant acrylic resin 202 on the outside of the optical fiber core 201 to ensure its high-temperature resistance; the optical fiber 2 is arranged in the optical fiber positioning groove 104 of the packaging base 1; the armored sleeve 3 is provided on the outside of the fiber outlet part of the optical fiber 2; the optical fiber 2 and the packaging base 1 are fixed by welding glass 203; the packaging base 1 is used to be welded on the surface 8 of the steel structure to be monitored.
[0025] In this embodiment, preferably, this embodiment also includes a sensor protection device; the sensor protection device includes: a stainless steel protective shell 4, a stainless steel pressing plate 5, a welding stud 6 and a nut 7; the welding stud 6 is welded to the steel structure surface 8; the stainless steel protective shell 4 is installed on the welding stud 6 and is covered around the packaging base 1; the stainless steel pressing plate 5 is sleeved on the welding stud 6 to fix the optical fiber 2 wrapped in the armored sleeve 3 for fiber output; the nut 7 is tightened on the welding stud 6 to fix the stainless steel protective shell 4.
[0026] In this embodiment, preferably, the packaging base 1 includes: a central packaging base 102, an outer packaging base 103 and an annular sensitivity enhancement structure 101, and an optical fiber positioning groove 104 is arranged on the back of the central packaging base 102 and the outer packaging base 103, and four electric welding grooves are arranged on the outer packaging base 103 for welding the sensor to the steel structure surface 8.
[0027] In this embodiment, preferably, the armored sleeve 3 is arranged outside the optical fiber 2, and the armored sleeve 3 is made of high temperature resistant material.
[0028] In this embodiment, preferably, four rounded mounting holes are provided on the surface of the stainless steel protective shell 4, which is formed by stamping and welding a 2 mm thick plate.
[0029] In this embodiment, preferably, the stainless steel pressing sheet 5 is fixed by welding studs 6 to press the optical fiber 2 , and together with the optical fiber positioning groove 104 of the stainless steel protective shell 4 , the optical fiber 2 is protected from being squeezed.
[0030] In this embodiment, preferably, the welding bolt 6 is welded to the steel material by a stud welder.
[0031] In this embodiment, preferably, the nut 7 and the welding stud 6 fix the stainless steel protective sleeve 4 and the stainless steel pressing sheet 5 together.
[0032] In summary, the fiber Bragg grating strain sensor of this embodiment is fixed to the packaging base by using welding glass, and high-temperature resistant acrylic resin is added to the surface of the optical fiber, thereby improving the high-temperature resistance of the fiber Bragg grating sensor. The armored sleeve of the optical fiber outlet in this embodiment also uses high-temperature resistant materials. This embodiment designs a sensor protective shell to protect the sensor and increase the durability of the sensor. The protective shell is also provided with a fiber optic positioning groove to prevent the optical fiber from being squeezed and affecting the measurement results.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A high temperature resistant fiber Bragg grating strain sensor installed on the surface of steel, characterized in that: include: A packaging base (1), an optical fiber (2) and an armored sleeve (3); the optical fiber (2) uses a high temperature resistant acrylic resin (202) on the outside of the optical fiber core (201); the optical fiber (2) is arranged in the optical fiber positioning groove (104) of the packaging base (1); an armored sleeve (3) is provided on the outside of the fiber outlet portion of the optical fiber (2); the optical fiber (2) and the packaging base (1) are fixed by welding glass (203); the packaging base (1) is used for welding on the surface (8) of the steel structure to be monitored.
2. The high temperature resistant fiber Bragg grating strain sensor installed on the surface of steel according to claim 1, characterized in that: Also includes: Sensor protection device; The sensor protection device comprises: a stainless steel protective shell (4), a stainless steel pressing sheet (5), a welding stud (6) and a nut (7); the welding stud (6) is welded to a steel structure surface (8); the stainless steel protective shell (4) is mounted on the welding stud (6) and is covered around the packaging base (1); the stainless steel pressing sheet (5) is sleeved on the welding stud (6) and is used to fix the optical fiber (2) wrapped in the fiber-out armored sleeve (3); the nut (7) is tightened on the welding stud (6) and is used to fix the stainless steel protective shell (4).
3. The high temperature resistant fiber Bragg grating strain sensor installed on the surface of steel according to claim 2, characterized in that: The packaging base (1) comprises: a central packaging base (102), an outer packaging base (103) and an annular sensitivity enhancement structure (101), optical fiber positioning grooves (104) are arranged on the back of the central packaging base (102) and the outer packaging base (103), and four electric welding grooves are arranged on the outer packaging base (103) for welding the sensor to the surface of the steel structure (8).
4. The high temperature resistant fiber Bragg grating strain sensor installed on the surface of steel according to claim 1, characterized in that: The armored sleeve (3) is arranged outside the optical fiber (2), and the armored sleeve (3) is made of high temperature resistant material.
5. The high temperature resistant fiber Bragg grating strain sensor installed on the surface of steel according to claim 2, characterized in that: The stainless steel protective shell (4) has four rounded mounting holes on its surface and is made of 2 mm thick sheet material by stamping and welding.