CN214011102U - Concrete and carbon fiber composite intelligent sensing device - Google Patents
Concrete and carbon fiber composite intelligent sensing device Download PDFInfo
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- CN214011102U CN214011102U CN202023158995.4U CN202023158995U CN214011102U CN 214011102 U CN214011102 U CN 214011102U CN 202023158995 U CN202023158995 U CN 202023158995U CN 214011102 U CN214011102 U CN 214011102U
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Abstract
The utility model discloses a concrete and carbon fiber complex's intelligent sensing device belongs to intelligent sensing device technical field, including the encapsulation concrete section and by conductive concrete pouring fashioned intelligent concrete section, the encapsulation concrete section is connected with the intelligent concrete section, and the carbon fiber complex intelligent material intelligent concrete section that is packaged with two mutual contactless and quadrature settings between encapsulation concrete section and the intelligent concrete section embeds there are two electrodes that are used for detecting the resistivity change. The resistance change of the carbon fiber composite intelligent material represents the strain change of the concrete at the elastic stage around the intelligent sensing device, and the resistance change between two electrodes in the intelligent concrete section represents the damage degree and change of the concrete at the plastic stage around the intelligent sensing device when the concrete is stressed.
Description
Technical Field
The utility model relates to an intelligent sensing device field, concretely relates to concrete and carbon fiber complex intelligent sensing device.
Background
The strength of the bearing structures such as beams and columns in the building is related to the overall safety of the building, and the strength of concrete and the damage of the interior of the stressed concrete are factors directly influencing the safety of the bearing structures such as beams and columns. The strength of the concrete is influenced by the material and the material proportion, and the solidification process of the early-stage curing of the concrete is also important; however, no good quantitative monitoring method exists for the internal damage degree of concrete at the solidification stage or at the later stage after the concrete is stressed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem, provide a concrete and carbon fiber complex intelligent sensing device, can effectually carry out effectual quantization with the stress variation of the elasticity stage of concrete to and impaired degree and the damage development condition behind the concrete atress.
In order to achieve the above object, the utility model provides a following scheme: the utility model relates to a concrete and carbon fiber complex's intelligent sensing device, including encapsulation concrete section and the mixed fashioned intelligent concrete section of pouring of conductive concrete, encapsulation concrete section is connected with intelligent concrete section, is packaged with the carbon fiber complex intelligent material that two mutual contactless and quadrature set up between encapsulation concrete section and the intelligent concrete section, and intelligent concrete section embeds there are two electrodes that are used for detecting the resistivity change.
Preferably, the carbon fiber composite intelligent material is in a long strip shape.
Preferably, the carbon fiber composite intelligent material is connected with the detector through a copper wire.
Preferably, the electrode is a copper wire electrode, and the copper wire electrode is connected with the detector.
Preferably, the intelligent concrete section is a cylinder with the diameter of 20-40 mm and the thickness of 10-20 mm.
Preferably, the packaging concrete section is a cylinder with the diameter of 20-40 mm and the thickness of 10-20 mm.
Preferably, the conductive concrete is formed by mixing a conductive material and concrete, wherein the conductive material is graphite powder, carbon black, carbon fiber or graphene.
Preferably, the amount of the conductive material in the intelligent concrete section is 5% of the amount of the concrete.
The utility model discloses for prior art gain following technological effect:
1. the carbon fiber composite intelligent material has the characteristic of force sensitivity of light specific gravity, high conductivity and higher sensitivity. The stress condition of the structure can be sensitively sensed by utilizing the performance of the carbon fiber composite intelligent material, so that after the carbon fiber composite intelligent material is packaged in the intelligent concrete section and the packaged concrete section, when the surrounding concrete is solidified, the carbon fiber composite intelligent material can monitor the strain change of the surrounding concrete in the elastic stage, and the strain change of the concrete in the elastic stage can be well quantified by monitoring the change condition of the resistivity at two ends of the carbon fiber composite intelligent material, so that the observation and the research are convenient;
the intelligent concrete section is formed by pouring conductive concrete mixed by doping conductive materials into common concrete, so that the intelligent concrete section has the characteristics of conductivity and pressure sensitivity. The performance of the cement-based composite material is maintained, the durability is good, the service life of the cement-based composite material is as long as that of common concrete, and the cement-based composite material has the characteristics of a pressure-sensitive material. When the concrete is not damaged under stress, the resistivity of the concrete doped with the conductive material is reduced, and after the concrete is damaged, the resistivity is gradually increased, the damage is more serious, and the resistivity increase amplitude is larger, so that the evolution development of the internal damage of the intelligent concrete section can be obtained by detecting the resistance change between the two electrodes by using a detector, the concrete structure change around the building structure where the intelligent sensing device is located is well represented, and the concrete structure change is effectively quantified;
the intelligent carbon fiber composite material is suitable for monitoring the strain change of concrete in the elastic stage, the intelligent concrete is suitable for monitoring the damage change of the intelligent concrete after the intelligent concrete enters the plastic stage, the intelligent concrete and the intelligent carbon fiber composite material are combined together to form the composite sensor by utilizing the respective characteristics of the intelligent carbon fiber composite material and the intelligent concrete, and meanwhile, the intelligent carbon fiber composite material sensor is encapsulated on the intelligent concrete section by the encapsulating concrete, so that the intelligent carbon fiber composite material sensor can be prevented from being damaged by outside carelessness, therefore, after the encapsulation is completed in a laboratory and the intelligent carbon fiber composite material is embedded in a building structure, the encapsulating concrete section is a medium for transmitting stress and straining the intelligent carbon fiber composite material.
2. Through the both ends of monitoring rectangular form carbon fiber composite intelligent material, make rectangular form carbon fiber composite intelligent material have had clear and definite direction, through the change of monitoring rectangular form carbon fiber composite intelligent material's both ends resistivity, the sign that can be clear goes out in the concrete along the change of meeting an emergency of this direction, and the rectangular form carbon fiber composite intelligent material of mutual quadrature can be with two most leading directions of meeting an emergency signs of building structure.
3. The conductive concrete is prepared by doping a conductive material into common concrete, wherein the conductive material can be graphite powder, carbon black, carbon fiber, graphene and the like. Among them, graphene is the most preferred conductive material, and graphene is a honeycomb lattice structure of a monolayer arrangement of carbon atoms, has a thickness of only one carbon atom, is the thinnest of the known materials, and has very high conductivity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is an exploded schematic view of the overall structure of a concrete and carbon fiber composite intelligent sensing device;
FIG. 2, top view of intelligent concrete segment and carbon fiber composite intelligent material.
Description of reference numerals: 1. an intelligent concrete section; 2. an electrode; 3. carbon fiber composite intelligent material; 4. and (5) packaging the concrete section.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment provides an intelligent sensing device compounded by concrete and carbon fiber, which comprises an intelligent concrete section 1 and an encapsulation concrete section 4, wherein the intelligent concrete section 1 is formed by pouring conductive concrete; the packaged concrete section 4 is completely formed by pouring common concrete, two carbon fiber composite intelligent materials 3 are attached to the upper surface of the intelligent concrete section 1, the two carbon fiber composite intelligent materials 3 are arranged in an orthogonal mode without being contacted with each other, strain change conditions in two directions of the concrete elastic stage are represented, the packaged concrete section 4 is packaged on the upper surface of the intelligent concrete section 1, and the carbon fiber composite intelligent materials 3 are packaged between the packaged concrete section 4 and the intelligent concrete section 1; two electrodes 2 are arranged in the intelligent concrete section 1. During the use, pour this intelligent sensing device in the building structure that will monitor, put through the detector with two electrodes 2 in intelligent concrete section 1 to and every carbon fiber composite intelligent material 3's both ends are connected to the detector through the wire respectively. In the stage of elastic deformation of the building structure concrete during solidification, the intelligent concrete section 1 and the carbon fiber composite intelligent material 3 are in deformation coordination, but the change of the resistivity of the intelligent concrete section 1 cannot represent the strain change in a certain determined direction, and the carbon fiber composite intelligent material 3 has a definite direction, so that the strain change along the direction can be clearly represented by monitoring the change of the resistivity of two ends of the carbon fiber composite intelligent material 3; when the concrete gets into the plasticity stage, carbon fiber composite intelligent material 3 no longer coordinates with the deformation of concrete, so no longer pay attention to the resistivity change of carbon fiber composite intelligent material 3, along with the increase of load, the damage appears in the concrete around the intelligent sensing device position, extrude intelligent concrete section 1 and encapsulation concrete section 4, the resistivity in intelligent concrete section 1 can change, through the change of the resistivity between monitoring two electrodes 2, can characterize the degree and the change condition of intelligent concrete section 1 damage, then the development of the damage degree of concrete structure around the intelligent sensing device, effectual quantization.
Further, in this embodiment, the carbon fiber composite smart material 3 is in a long strip shape, and by collecting the resistivity change between the two ends of the long strip-shaped carbon fiber composite smart material 3, the long strip-shaped carbon fiber composite smart material 3 has a definite directionality, and can represent the direction of the stress change more clearly, and the orthogonal long strip-shaped carbon fiber composite smart material 3 can represent the stress change in two orthogonal directions of the concrete simultaneously.
In this embodiment, the two ends of the intelligent carbon fiber composite material 3 are respectively connected with a copper wire, the copper wire penetrates through the surrounding concrete structure to be connected with the detector, the detector collects the change of the resistivity between the two ends of the intelligent carbon fiber composite material 3 in real time, and the copper wire and the intelligent carbon fiber composite material 3 can be bonded together by adopting conductive epoxy glue.
Furthermore, in the embodiment, the electrode 2 is a copper wire electrode, the copper wire electrode is sensitive to the change of the monitoring resistance, and is connected with the detector through the copper wire electrode, so that the resistivity change between the copper wire electrodes can be accurately monitored in real time, and the reverse thrust is performed according to the characteristics of the intelligent concrete section 1 doped with the conductive material (namely, when the concrete is not damaged under stress, the resistivity of the concrete doped with the conductive material is reduced, and after the concrete is damaged, the resistivity is gradually increased, the damage is more serious, and the resistivity increase amplitude is larger), so that when the detector detects that the resistivity between the copper wire electrodes is reduced, the fact that the concrete is not damaged at the moment can be inferred; when the detector detects that the resistivity is gradually increased, the damage of the concrete can be inferred, when the increase amplitude of the resistivity detected by the detector is larger, the more serious the damage of the concrete is, and then the evolution development of the damage inside the concrete is quantified.
In this embodiment, as shown in fig. 1-2, the intelligent concrete section 1 is a cylinder with a diameter of 20-40 mm and a thickness of 10-20 mm, the encapsulating concrete section 4 is a cylinder with a diameter of 20-40 mm and a thickness of 10-20 mm, and the encapsulating concrete section 4 is a medium for transferring stress and strain to the carbon fiber composite intelligent material, so the thickness of the encapsulating concrete section 4 is not too thick.
Further, in the present embodiment, the thickness of the intelligent concrete segment 1 and the packaging concrete segment 4 is preferably 15mm, and the diameter is preferably 30 mm. So that encapsulation concrete section 4 and intelligent concrete section 1 encapsulation back together, its thickness, the diameter all is about 30mm, make intelligent sensing device size be equivalent to the size of a ordinary stone, after intelligent sensing device buries in roof beam and post, its size can not influence the structure of roof beam and post itself, reduce the influence to building structure as far as possible, guarantee building structure's design intensity's requirement, of course intelligent sensing device's size also can adjust according to actual needs, and want to monitor the concrete of building structure the position change of meeting an emergency, just bury intelligent sensing device and want to monitor building structure's position can, general best set up the position be with intelligent sensing device setting in load-carrying members ' stress point.
Further, in this embodiment, the intelligent concrete segment 1 and the encapsulated concrete segment 4 can also be in various shapes such as a cube, a cuboid, a polygon, and a sphere, and can be manufactured according to actual needs.
In the embodiment, the conductive concrete is formed by mixing a conductive material and common concrete, the conductive material is a material with good conductivity and high sensitivity and force-sensitive characteristics, such as graphite powder, carbon black, carbon fiber or graphene, and particularly graphene which is a honeycomb lattice structure with single-layer arrangement of carbon atoms and has the thickness of only one carbon atom is the thinnest of the known materials and has very high conductivity and high sensitivity, so that the graphene is the most preferable conductive material, and after being doped into the common concrete, the graphene has the service life of the common concrete, the performance and durability of a cement-based composite material, and also has good conductivity and pressure-sensitive characteristics, so that the intelligent sensing device can be used for a long time, and the concrete structure change around a building structure where the intelligent sensing device is located can be clearly quantified, and contributes to the research of the concrete strength change.
In this embodiment, but detector connecting alarm device, when discovering the impaired condition of building structure concrete through intelligent sensing device and be about to reach the risk degree, alarm device can carry out timely early warning, because the surface of building structure does not have big performance characteristic usually when the concrete is impaired, nevertheless concrete structure is inside very probably to have damaged seriously, wait when building structure's surface appears the characteristic, building structure has had the risk of very big collapse, can't in time remedy this moment. Therefore, by arranging the alarm device, safety early warning is made in advance so as to be convenient for timely remediation.
In the embodiment, the consumption of the conductive material in the intelligent concrete section is 5% of the consumption of the concrete, so that the intelligent sensing device has the basic characteristic of the concrete, simultaneously achieves the optimal conductivity and the force-sensitive characteristic with high sensitivity, accurately senses the stress condition of the concrete structure, provides possibility for monitoring the structural health, simultaneously ensures that the concrete strength of the intelligent sensing device under the consumption is not much different from the concrete strength of the surrounding, on one hand, avoids the problems that the intelligent sensing device has insufficient strength, cannot be synchronously damaged with the building structure and cannot achieve the monitoring effect due to premature damage, on the other hand, avoids the intelligent sensing device has overhigh strength, and when the concrete of the surrounding building extrudes the intelligent sensing device under the stress, the damage degree of the concrete of the surrounding building is increased due to overhigh strength of the intelligent sensing device, even the concrete of the surrounding building is damaged, the internal structure of the intelligent sensing device is not damaged, and then the damaged degree of the building can not be accurately represented.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. The utility model provides a concrete and carbon fiber complex's intelligent sensing device, its characterized in that, is including encapsulation concrete section and by conductive concrete pouring fashioned intelligent concrete section, the encapsulation concrete section with intelligent concrete section is connected, it has two contactless and the compound intelligent material of carbon fiber of quadrature setting to encapsulate between encapsulation concrete section and the intelligent concrete section, intelligent concrete section embeds there are two electrodes that are used for detecting the resistivity change.
2. The concrete and carbon fiber composite smart sensor of claim 1, wherein the carbon fiber composite smart material is in the form of a strip.
3. The concrete and carbon fiber composite intelligent sensing device is characterized in that the carbon fiber composite intelligent material is connected with a detector through a copper wire.
4. The concrete and carbon fiber composite intelligent sensing device according to claim 1, wherein the electrode is a copper wire electrode, and the copper wire electrode is connected with a detector.
5. The intelligent sensor device of claim 1, wherein the intelligent concrete section is a cylinder with a diameter of 20-40 mm and a thickness of 10-20 mm.
6. The intelligent sensor device of claim 5, wherein the encapsulated concrete section is a cylinder with a diameter of 20-40 mm and a thickness of 10-20 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023158995.4U CN214011102U (en) | 2020-12-24 | 2020-12-24 | Concrete and carbon fiber composite intelligent sensing device |
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| CN202023158995.4U CN214011102U (en) | 2020-12-24 | 2020-12-24 | Concrete and carbon fiber composite intelligent sensing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623757A (en) * | 2022-03-03 | 2022-06-14 | 深圳大学 | Vertical graphene wireless sensing device for monitoring concrete cracks |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623757A (en) * | 2022-03-03 | 2022-06-14 | 深圳大学 | Vertical graphene wireless sensing device for monitoring concrete cracks |
| CN114623757B (en) * | 2022-03-03 | 2023-12-05 | 深圳大学 | Vertical graphene wireless sensing device for monitoring concrete cracks |
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