CN211904174U - Structural member with built-in sensing element - Google Patents
Structural member with built-in sensing element Download PDFInfo
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- CN211904174U CN211904174U CN202020161797.4U CN202020161797U CN211904174U CN 211904174 U CN211904174 U CN 211904174U CN 202020161797 U CN202020161797 U CN 202020161797U CN 211904174 U CN211904174 U CN 211904174U
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Abstract
The utility model provides a built-in sensing element's structure, sensing element arrange the building in or build the structure in to fuse into an organic whole with the structure body. Adopt the utility model discloses the structure can reduce test element and installation cost, improve test stability, avoid all sorts of defects of field assembly and installation by a wide margin, can also reduce sensing element's breakage rate, improves sensing element's reliability and life.
Description
Technical Field
The utility model relates to a building or structure of built-in sensing element.
Background
With the rapid development of economy and science, the safety and operation effect measurement and control technology of a building or a construction structure are greatly improved, which becomes an essential important link of engineering projects, and an intelligent structure taking measurement and control as a main body becomes a mainstream direction of future scientific and technological development. The measurement and control technology mainly comprises a detection technology and an information transmission technology. With the help of internet platform, the information transmission technology has been greatly developed in recent years, and basically, a whole-course technical system of automatic real-time transmission and display is realized. With the advent of 5G technology, information transfer technology will tend to be more sophisticated and faster. Detection techniques such as fiber optic tests, wave tests, electromagnetic wave tests, and the like have also been significantly developed in recent years. However, research on detection techniques has been limited to sensors (sensor elements) and information processing techniques, and information detection requires additional sensor elements to be structurally provided (also referred to as a sensor element test method). At present, the following problems mainly exist in the sensing element testing method: the sensor element placement and fixing method is closely related to the detection result, is a work with higher technical content, has too large components according to different people, and directly influences the authenticity of the test data; the sensing element is greatly influenced by the environment, such as temperature, humidity, mechanical contact and the like, and the authenticity of test data is influenced by the factors; under the influence of technology and environment, the service life of the sensor is too short, the failure rate is too large, and in many cases, the 2-year effective rate of the sensor is less than 60 percent and the sensor cannot be repaired again; limited by the structural size of the sensor, the sensor cannot be arranged in many cases; the sensor has high cost and high damage rate, and is not convenient for large-scale use. Due to the foregoing problems, the information stability, scalability, reliability, implementability, etc. of an intelligent structure are greatly affected, and in contrast to the rapidly developing information transmission technology, the intelligent structure has become a serious obstacle to the development of the structure intelligence.
In addition, patent document CN207379513U discloses a layout structure of a built-in optical fiber sensor, which includes a concrete structure, an optical fiber intelligent rib, a press block, a bolt or a screw, and a filling material. The surface of the concrete structure is provided with a groove, optical fiber intelligent ribs are laid in the groove, and the optical fiber intelligent ribs are fixed in the concrete structure through pressing blocks and bolts or screws. The optical fiber intelligent rib is formed by pre-reinforcing the optical fiber, and the applied micro-prestress is applied by a tightener or manually. The built-in optical fiber sensor is internally provided with a herringbone fiber textile sleeve or a polyethylene armored bare optical fiber. Outside the built-in optical fiber sensor, the optical fiber rod or the optical fiber cable is formed by being tightly wrapped again. The optical fiber rod is wrapped by pultrusion type glass fiber reinforced polymer materials or polyethylene materials. The structure fixes the optical fiber intelligent rib in the concrete structure through the pressing block and the bolt or the screw, and the mode has no essential change compared with the traditional method of slotting on the structure, additionally arranging the sensing element, fixing, protecting and leading out the lead, is still influenced by the factors of installation technology, component space, environmental conditions, lead safety and the like, particularly is difficult to control and detect by applying micro-prestress, and has great influence on the detection result.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a built-in sensing element's structure to reduce factors such as on-the-spot installation technique, installation space, environmental condition to the influence of testing result.
In order to achieve the above purpose, the present invention adopts the following technical solution.
A structural member with built-in sensing element is arranged in a building or a construction structural member and is integrated with a structural member body.
Preferably, the sensor element is integrated into the structural body by means of an adhesive connection.
Preferably, the sensor element transmission line is integrated with the structural body by means of a glued connection.
Preferably, the structural member may be a structural single body or a structural assembly.
Preferably, the structural member is provided with an element cavity for accommodating the sensing element and a line cavity for accommodating the sensing element transmission line, one end of the line cavity is connected with the element cavity, and the sensing element transmission line extending from the other end of the line cavity is used for connecting with external equipment.
Preferably, in the adhesion bonding method, after the sensor element is placed in the chamber, an adhesive layer for adhesion is injected into a gap between the inner wall of the chamber and the outer wall of the sensor element and the outer wall of the transmission line of the sensor element.
Preferably, the single element chamber accommodates a single or a plurality of sensing elements.
Preferably, the structural member is a steel bar, a section steel, a section aluminum, a geogrid, a reinforced concrete prefabricated member, an anchoring structure, a plastic reinforced strip, a plastic plate, a plastic rib, a plastic member and the like.
Preferably, the sensing element can be one or more of a temperature sensor, a force sensor, a speed sensor and a strain sensor used in the field of buildings and structures.
Has the advantages that: the structure of the utility model integrates the structure function and the information function, so that the authenticity of the detection information is greatly improved; the structure member of the utility model can be produced in batch and large scale in the processing and manufacturing stage, can greatly reduce the cost of testing elements and installation, improve the testing stability and avoid various defects of on-site assembly and installation; the utility model discloses place sensing element inside the structure, and sensing element and structure fuse into an organic whole formula structure, not only can reduce the influence of service environment to sensing element by a wide margin, can not cause the accuracy of testing result to reduce because of on-the-spot mounted position and mounting means moreover, can also reduce sensing element's breakage rate, improve sensing element's reliability and life, solved the technical problem of "the influence of factors such as on-the-spot installation technique, installation space, environmental condition to the testing result"; the utility model discloses changed the state of traditional sensing element and structural material separation, can form emerging information structure material industry, avoided the technical barrier of traditional sensing element installation, complicated environmental restriction, the effective rate that is difficult to ensure, changed traditional information detection high technique, costly, low efficient state, made information detection become more simple, low value, high efficiency.
Drawings
FIG. 1 is a partial schematic view of a reinforced concrete beam in example 1;
FIG. 2 is a schematic view taken from the direction 1-1 in FIG. 1;
FIG. 3 is a schematic representation of information rebar of the reinforced concrete beam of FIG. 1;
FIG. 4 is a schematic view from 2-2 in FIG. 3;
FIG. 5 is a schematic view of the information section steel of example 2;
fig. 6 is a schematic view of the geogrid of example 3;
FIG. 7 is a schematic view from 3-3 of FIG. 6;
figure 8 is a schematic representation of the geotextile reinforcement strip of example 4;
in the figure, 1-common steel bar, 2-information steel bar, 3-sensing optical fiber, 4-adhesive, 5-steel wire, 6-information reinforced belt, 7-common reinforced belt and 8-I-shaped information section steel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following description of the embodiments is only for the purpose of helping understanding the principle and the core idea of the present invention, and is not intended to limit the scope of the present invention. It should be noted that modifications to the present invention may occur to those skilled in the art without departing from the principles of the present invention and are intended to fall within the scope of the appended claims.
Example 1
A structural member (steel bar) with a built-in sensing element is characterized in that the sensing element is built in the steel bar during processing, the sensing element and the steel bar form an integrated structure after processing is completed, and the steel bar with the built-in sensing element is called an information steel bar in the embodiment.
As shown in fig. 1 and 2, the reinforced concrete beam detects the deformation and stress of the reinforcing steel bars at the lower part of the beam, and comprises the following steps:
step 1, an information steel bar 2 is arranged in the lower part of a beam, the structure of the information steel bar 2 is shown in figures 3 and 4, the information steel bar 2 is formed by forming a hole in the common steel bar in advance (such as before the steel bar leaves a factory), a sensing optical fiber 3 is arranged in the hole, then an adhesive 4 is injected, the sensing optical fiber 3 and the steel bar are bonded and fixed together, namely the sensing optical fiber 3 (a sensing element) and the steel bar (a structural element) are processed into a whole in advance, and the information steel bar 2 has both the stress and the information detection function;
and 3, when the reinforced concrete beam is stressed, the information steel bar 2 and the common steel bar 1 are stressed and deformed together, and the stress and deformation states are transmitted to an external detection instrument through the internal sensing optical fiber 3, so that deformation and stress data are obtained.
The information steel bar 2 is calibrated in batch before leaving the factory, the deformation and stress of the information steel bar have one-to-one correspondence with the optical information obtained by the sensing optical fiber 3, and the relationship is input into an external detection instrument, so that the deformation and stress data can be obtained from the obtained optical information.
For the reinforced concrete beam of the embodiment, a sensing element does not need to be arranged on the wall surface of the beam, and secondary protection does not need to be carried out on the sensing element and a lead-out line, the effectiveness of the sensing element and the detection line inside the structural element (steel bar) is determined by a production process and is hardly influenced by field installation personnel and the construction process of the concrete beam, so that the influence and damage rate of the use environment on the sensing element can be greatly reduced, the reliability and the service life of the reinforced concrete beam are improved, the technical barriers and the complex environmental limitations of the traditional sensing element installation are avoided, the effective rate which is difficult to ensure is improved, the high-technology, high-cost and low-efficiency states of the traditional information detection are changed, and the information detection is simple, low-value and high-.
It should be noted that, although the embodiment only shows the implementation of one reinforced concrete beam, the embodiment can be generalized to the implementation of a reinforced concrete structure system, for example, the information steel bar 2 of the structural member can extend out of the structure system at a suitable position to form an external system wire network, and then is connected to an external detection instrument.
Example 2
A structural member (section steel) with a built-in sensing element is characterized in that the sensing element is built in the section steel being processed, and the sensing element and the section steel form an integrated structure after the processing is finished.
The method for detecting the stress and deformation of the steel structure can be implemented by adopting a method for arranging the information section steel 8 (i-shaped information section steel 8) according to the idea of embodiment 1, wherein the information section steel 8 is shown in fig. 5, and the method comprises the following steps:
step 1, arranging information section steel 8 at a position needing to detect stress and deformation according to the use characteristics and stress relation of steel structure system buildings, bridges and the like; the information section steel has various varieties, and fig. 5 is a structural schematic diagram of an I-shaped information section steel 8; the information section steel 8 is formed by forming a hole in the common section steel, placing the sensing optical fiber 3 in the hole, then injecting the binder 4, and binding the sensing optical fiber 3 and the section steel together;
and 3, when the structural system is stressed, the stress and deformation states of the information section steel 8 are transmitted to an external detection instrument through the internal sensing optical fiber 3, and thus deformation and stress data are obtained.
The information section steel 8 is calibrated in batch before leaving the factory, the deformation and stress of the information section steel have one-to-one correspondence with the optical information obtained by the sensing optical fiber 3, and the relationship is input into an external detection instrument, so that the deformation and stress data can be obtained from the obtained optical information.
The diameter of the sensing optical fiber 3 is very small, only about 1mm, the proportion of the sensing optical fiber to the sectional area of the information section steel 8 is very small, and the strength of the sensing optical fiber can be calculated according to the actual sectional area of the information section steel 8 when the sensing optical fiber is used.
In this embodiment, under the condition that the load requirement is satisfied, the section steel can be replaced by the section aluminum. For the structure system of the embodiment, a sensing element does not need to be arranged on the surface of the structure, and secondary protection does not need to be carried out on the sensing element and the lead-out line, the effectiveness of the sensing element and the detection line inside the structural element (profile steel) is determined by a production process and is hardly influenced by field installation personnel and a construction process, the influence and damage rate of a use environment on the sensing element can be greatly reduced, the reliability and the service life of the sensing element are improved, the technical barrier, the complex environmental limitation and the efficiency which is difficult to ensure of the traditional sensing element installation are avoided, the high-technology, high-cost and low-efficiency states of the traditional information detection are changed, and the information detection is simple, low-value and high-efficiency.
Example 3
A structure (geogrid) with a built-in sensing element is arranged in the geogrid during processing, and the sensing element and the geogrid form an integrated structure after processing.
The reinforced earth retaining wall is mainly formed by arranging a layer of soil and a layer of geogrid at intervals and forming a structural body through rolling. The internal structure of the reinforced earth retaining wall mainly refers to geogrids which are formed by connecting reinforced strips in a net-shaped distribution manner as shown in fig. 6. The common reinforced belt 7 is a belt-shaped material formed by fusing high polymer material polyethylene or polyphenyl and a high-strength steel wire 5.
The method for detecting the stress and deformation of the reinforced retaining wall can be used for detecting the stress and deformation of the reinforced retaining wall by adopting a method for arranging the information reinforced belt 6 according to the idea of the embodiment 1, wherein the information reinforced belt 6 is shown in fig. 7 and comprises the following steps:
step 1, arranging an information reinforced belt 6 on a part, which needs to be subjected to stress detection and deformed, of the geogrid to replace a common reinforced belt 7, as shown in fig. 6; the information reinforcing band 6 is formed by arranging the sensing optical fiber 3 at a certain position of the original steel wire 5, and the steel wire 5 and the finished product of the sensing optical fiber 3 with protection are arranged side by side; because the melting point of the polymer material for manufacturing the ribbed belt is very low in a plastic state, the information ribbed belt 6 shown in fig. 7 can be formed by extrusion through a die;
and 3, after the geogrid is stressed, transmitting the stress and deformation states of the information reinforced belt 6 to an external detection instrument through the sensing optical fiber 3 in the reinforced belt, and thus obtaining deformation and stress data.
The information reinforcing band 6 is calibrated in batch before leaving the factory, the deformation and stress of the information reinforcing band are in one-to-one correspondence with the optical information obtained by the sensing optical fiber 3, and the deformation and stress data can be obtained from the obtained optical information by inputting the relationship into an external detection instrument.
The embodiment fills the blank of geogrid stress and deformation information detection, and has important effects and guiding significance on safety control and theoretical perfection of the reinforced earth retaining wall.
Example 4
A structural member (geotechnical reinforced belt) with built-in sensing elements is shown in figure 8, and is characterized in that in the processing stage of a traditional steel-plastic composite reinforced belt 1, a detection optical fiber 2 and a steel wire 3 are implanted into the reinforced belt 1 together to form an information reinforced belt 4; after the detection optical fiber 2 is implanted, the detection optical fiber 2 is fixed in the traditional reinforced belt 1 and is integrated with the traditional reinforced belt 1. Wherein, one end or both ends of the information reinforced belt 4 extend out of the structure body where the reinforced belt 1 is positioned and are connected with external detection equipment. The number of the implanted detection optical fibers 2 and the arrangement of the measuring points are determined according to the detection requirements; the detection optical fibers 2 are arranged on the reinforced band 1 in a centered and symmetrical mode.
Example 5
A structural member (plastic reinforced belt) with a built-in sensing element is characterized in that a detection optical fiber is implanted into the inside of the reinforced belt to form an information reinforced belt at the processing stage of the traditional plastic reinforced belt; after the detection optical fiber is implanted, the detection optical fiber is fixed in the traditional reinforced band and is integrated with the traditional reinforced band. Wherein, one end or both ends of the information ribbed belt extend out of the structure body where the ribbed belt is located and are connected with external detection equipment. The number of the implanted detection optical fibers and the arrangement of the measuring points are determined according to the detection requirements; the detection optical fibers are arranged on the reinforced belt 1 in a centered and symmetrical mode.
In addition, the detection optical fiber can be implanted into the plastic plate or the plastic rib at the processing stage of the traditional plastic plate or the plastic rib; after the detection optical fiber is implanted, the detection optical fiber is fixed in the traditional plastic plate or plastic rib and is integrated with the traditional plastic plate or plastic rib.
Claims (6)
1. A structural member incorporating a sensing element, comprising: the sensing element is directly arranged in the integral building structural member or the integral building structural member and is integrated with the structural member body; the structural member body is internally provided with an element cavity for accommodating a sensing element and a line cavity for accommodating a sensing element transmission line, one end of the line cavity is connected with the element cavity, and the sensing element transmission line extending out of the other end of the line cavity is used for connecting external equipment.
2. The structure of claim 1, wherein: and integrating the sensing element and/or the sensing element transmission line with the structural member body by adopting a bonding connection mode.
3. The structure of claim 2, wherein: after the sensing element is placed in the cavity, bonding layers for solidification are injected into gaps between the inner wall of the cavity and the outer wall of the sensing element and gaps between the inner wall of the cavity and the outer wall of the transmission line of the sensing element.
4. The structural member of claim 3, wherein: the single element chamber houses a single or multiple sensing elements.
5. The structural member of any one of claims 1-4, wherein: the integral building structural member or the integral building structural member is one of a steel bar, profile steel, section aluminum, geogrid, a reinforced concrete prefabricated member, an anchoring structure, a plastic reinforcing bar belt and a plastic member.
6. The structural member of claim 5, wherein: the sensing element is one or more of a temperature sensor, a force sensor, a speed sensor and a strain sensor used in the field of buildings and structures.
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| CN202020161797.4U CN211904174U (en) | 2020-02-11 | 2020-02-11 | Structural member with built-in sensing element |
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| CN202020161797.4U CN211904174U (en) | 2020-02-11 | 2020-02-11 | Structural member with built-in sensing element |
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