A device for detecting the strength of building concrete

Abstract

The present invention discloses a building concrete strength detection device, which relates to the technical field of civil engineering concrete detection, and is used to overcome the problems of extreme value distortion of strength detection caused by concrete stress inertia and fuzzy strength detection results caused by high degree of concrete stress vector coupling. The present invention mainly reduces the possibility of extreme value distortion of concrete stress detection by setting stress sensors, conduction chambers and working fluids, and improves the continuity and accuracy of stress detection data transmission processing of concrete strength detection devices. By setting a detection shell, a detection transfer slider, a detection chamber and a stress sensor, the limit value of concrete stress detection by the strength detection device can be expanded. By setting a partition layer, an auxiliary sensing chamber, a conduction block, a detection transfer slider and a guide pipe, the directional strength detection noise of concrete caused by the coupling of all-directional detection stress is reduced, and the accuracy of all-directional quantitative analysis of concrete strength is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering concrete detection, and particularly relates to a device for detecting the strength of building concrete. Background Art

[0002] Civil engineering building structures usually use reinforced concrete as the main building load-bearing body. The concrete structure formed by mixing and pouring concrete and steel bars has good load-bearing capacity, corrosion resistance, fire resistance, etc., and has a wide range of applications. Generally, the concrete structure itself has a certain elastic modulus and a range of elastic deformation of volume change; during the load-bearing process, when the elastic deformation caused by stress is within the deformation range, the concrete structure is not easily damaged; when the stress of the concrete structure breaks through the range of elastic modulus volume change, the concrete structure will have situations such as cracks and breakages that reduce the strength. During the actual production and pouring of the reinforced concrete structure, a protective layer is usually applied to the surface of the concrete structure. When cracks and breakages occur in the concrete structure due to strain, it is difficult to directly detect, and the prediction and detection of the strength of the concrete structure will be unpredictable, which is likely to cause major losses.

[0003] In the methods of concrete strength detection or flaw detection, the commonly used non-destructive detection methods are rebound based on the surface hardness feedback of concrete materials and acoustic wave method based on the propagation mutation feedback of acoustic waves in concrete materials; there are various methods for destructive strength detection of concrete structures, but they can no longer meet the needs of industrial development. Currently, applying the new generation of information technology to concrete strength monitoring can adapt to long-term and frequent industrial automation monitoring of concrete strength to achieve the purpose of high-level automated detection. In the existing concrete strength detection methods, sensing devices with relatively small volume that do not affect the pouring strength of the reinforced concrete structure are buried inside the concrete to directly detect the internal stress of the concrete, and then the change of the concrete strength is analyzed and processed according to the detection results of the sensing devices. Fiber Bragg grating sensors have a good application foundation in the field of concrete strain detection and are common sensing devices buried inside the concrete for strain monitoring. However, in most devices that directly bury fiber Bragg grating sensors inside the concrete for detection, there are still situations where it is difficult to efficiently and accurately detect the concrete strength, and it is difficult to meet the long-term automatic monitoring requirements of the new generation of informatization.

[0004] In the prior art, for example, Japanese invention patent JP7216464B2 discloses a stress monitoring sensor and a stress monitoring method. In this invention patent, a fiber grating sensor is wrapped and arranged in a separately cast concrete block, and the optical fiber conduit and the separately cast block are arranged inside the concrete to be monitored. The internal strain of the concrete structure to be detected at each stage after casting and molding can be monitored by the fiber grating sensor; however, in this optical fiber monitoring device, there may be a casting gap between the fiber grating sensor and the wrapped concrete block, or the fiber grating sensor and the wrapped concrete block may fail to contact due to stress during use, which may cause local detachment on the stress contact end face of the sensor, and strain monitoring may jump and fail.

[0005] For example, Korean invention patent KR101534262B1 discloses a pressure measuring device. In this invention patent, after the fluid working medium is filled in the cavity of the external device, the detection device is arranged on the opening of the concrete casting template through the partition and the separation membrane, so as to detect the concrete molding expansion force cast inside the concrete template; in this technical scheme, the concrete molding expansion force is transmitted through the separation membrane to affect the pressure of the working fluid, and there may be local stress concentration and contour fluctuations of the diaphragm docking to the concrete surface, so that the expansion force caused by concrete molding cannot be accurately transmitted to the pressure detection working fluid, and the forces affecting the concrete strength such as concrete molding shrinkage stress and creep stress may be difficult to detect, and there may be distortion in the concrete strength detection and analysis. Summary of the invention

[0006] The purpose of the present invention is to provide a building concrete strength detection device to overcome the shortcomings of the prior art, such as extreme value distortion of strength detection caused by concrete stress inertia and fuzzy detection results caused by concrete stress vector coupling.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A building concrete strength detection device comprises an integrated wire tube and a covering shell, wherein a stress sensor is arranged on the integrated wire tube, the stress sensor is arranged in the covering shell, the covering shell transmits stress to the stress sensor, the integrated wire tube is fixedly connected with a data processing module, a conduction cavity is arranged in the covering shell, a working fluid is arranged in the conduction cavity, the working fluid is incompressible, the stress sensor is located in the working fluid, suitable working fluid types include but are not limited to synthetic pressure oil, petroleum-based pressure oil, etc., the used working fluid is subjected to antifreeze blending, anti-condensation treatment and anti-corrosion treatment according to the use environment conditions, so as to ensure that the working fluid can follow the strength detection device buried in concrete to perform pressure transmission normally for a long time;

[0009] By setting up stress sensors, conduction chambers and working fluids, the integrity of concrete stress conduction is improved, the possibility of extreme value distortion in concrete stress detection is reduced, the continuity and accuracy of stress detection data transmission and processing of the concrete strength detection device are improved, and the informatization and automation level of concrete strength detection is improved.

[0010] Preferably, the stress sensor is a fiber grating sensor.

[0011] Preferably, the covering shell is a rigid structure, a negative pressure capacity variable cavity is provided in the side wall of the conduction cavity, a conduction block is slidably connected in the negative pressure capacity variable cavity, and the conduction block conducts stress to the working fluid;

[0012] By providing a negative pressure variable cavity, a conduction block and a covering shell, the detection noise of the concrete directional strength is reduced and the detection accuracy of the concrete directional strength is improved.

[0013] Preferably, a negative pressure sliding cavity is provided in the side wall of the negative pressure variable cavity, a connecting space is provided at the connecting position between the negative pressure variable cavity and the conducting cavity, and the negative pressure sliding cavity provides a sliding stroke for generating negative pressure;

[0014] By setting up a negative pressure sliding cavity, a conduction block, a negative pressure variable cavity and a conduction cavity, the influence of the directional coupling degree of concrete stress on the accuracy of strength detection is reduced, the convenience and accuracy of detecting the gap state inside the concrete are improved, and the early warning effect of concrete strength detection is improved.

[0015] Preferably, a detection housing is fixedly connected to the side wall of the conduction cavity, a detection cavity is arranged in the detection housing, the detection cavity is provided with the same working fluid, a detection transfer slider is slidably connected to the side wall of the detection cavity facing the conduction cavity, two ends of the detection transfer slider are respectively located in the detection cavity and the conduction cavity, the detection transfer slider transfers the pressure in the conduction cavity to the detection cavity, and the stress sensor is located in the detection cavity;

[0016] By providing a detection shell, a detection transfer slider, a detection cavity and a stress sensor, the stress detection direction and the layout direction of the strength detection device can be decoupled, thereby improving the sensing stability of the strength detection device; reducing the possibility of concrete destroying the posture of the strength sensing device and reducing the detection accuracy, and reducing the influence of burying the detection device in the concrete on the concrete strength.

[0017] Preferably, the force conduction area of ​​the detection transfer slider in the detection cavity is larger than the force conduction area of ​​the detection transfer slider in the conduction cavity;

[0018] By setting the detection transfer slider, the conduction block and the conduction cavity, the limit value of the strength detection device for concrete stress detection can be expanded, the load of the strength detection device for concrete stress detection can be reduced, the service life of the concrete strength detection device can be increased, and the miniaturization and information performance of the detection equipment can be improved.

[0019] Preferably, the conducting force-bearing area of ​​the detection transfer slider in the conducting cavity is smaller than the conducting force-bearing area of ​​the conducting block in the conducting cavity;

[0020] The load of the detection stress on the concrete strength detection device can be further reduced, and the volume of the concrete strength detection device and the influence on the concrete strength can be further reduced.

[0021] Preferably, a partition layer is provided in the conduction cavity, the partition layer is a rigid structure, the partition layer divides the conduction cavity to form an auxiliary sensing cavity, a conduction block of the same structure is provided in the side wall of the auxiliary sensing cavity away from the partition layer, a guide pipe of the rigid structure is fixedly connected in the partition layer, one end of the guide pipe located outside the auxiliary sensing cavity is fixedly connected to a collecting tube seat, a collecting cavity is provided in the collecting tube seat, the collecting cavity and the auxiliary sensing cavity are communicated with each other, a group of detection shells, detection cavities, stress sensors and detection transfer sliders of the same structure are provided at the other end of the collecting tube seat, and the detection transfer sliders transfer and balance the pressure between the auxiliary sensing cavity and the detection cavity through the collecting cavity;

[0022] By setting up a separation layer, an auxiliary sensing cavity, a conduction block, a detection transfer slider and a guide pipe, the coupling of the concrete stress vector is reduced, the verification convenience of the concrete directional strength detection is improved, the concrete directional strength detection noise caused by the coupling of the directional detection stress is reduced, and the accuracy of the concrete directional strength detection is improved;

[0023] The amplitude of the fluctuation of the sensing component caused by the inertia of concrete stress directly transmitted to the strength detection device is reduced, and the possibility of sensor detection distortion caused by the layout trajectory is further reduced.

[0024] Preferably, more than one partition layer is provided in the conduction cavity, the partition layer divides the conduction cavity into the conduction cavity and more than one auxiliary sensing cavity, and the angle between the stress conduction direction between the conduction block in the auxiliary sensing cavity and the conduction block in the conduction cavity is an acute angle;

[0025] By setting up the conduction block, the auxiliary sensing cavity, the conduction cavity and the separation layer, the decomposition accuracy of the concrete strain stress vector is improved, the accuracy of the quantitative analysis of the concrete strength in all directions is improved, the richness of the transmission parameters of the concrete strength detection data is improved, the complexity of the information data processing is reduced, the convenience of the energy supply expansion of the concrete strength detection device is improved, and the analysis and use efficiency of the detection data is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending based on the provided drawings.

[0027] Figure 1 is a three-dimensional structural schematic diagram of a building concrete strength detection device of the present invention;

[0028] Figure 2 is Figure 1 the front view schematic diagram of

[0029] Figure 3 is Figure 2 the left view schematic diagram of

[0030] Figure 4 is Figure 3 the partial enlarged schematic diagram at position A in

[0031] Figure 5 is Figure 4 the partial enlarged schematic diagram at position B in

[0032] Figure 6 is Figure 4 the partial enlarged schematic diagram at position C in

[0033] Reference numerals in the drawings: covering housing 10; conduction cavity 11; partition layer 12; auxiliary sensing cavity 13; flexible protection tube 15; integrated wire tube 16; distribution hole 17; stress sensor 18; conduction block 20; conduction bracket 21; negative pressure volume change cavity 22; negative pressure sliding cavity 23; first guiding spring 24; negative pressure matching block 25; detection housing 30; detection cavity 31; detection transfer slider 33; second guiding spring 34; collection pipe seat 36; collection cavity 37. Specific embodiments

[0034] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] The specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and should not be construed as limiting the present invention in any way. Under the guidance of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Embodiment 1

[0038] Referring to the attached Figure 1 to the attached Figure 4 As shown, the present invention provides a building concrete strength detection device, including an integrated wire tube 16 and a covering housing 10. The covering housing 10 can be made of materials such as concrete or polymers with strong corrosion resistance. A stress sensor 18 is provided on the integrated wire tube 16, and the stress sensor 18 is disposed in the covering housing 10. The covering housing 10 conducts the concrete strain stress to the stress sensor 18. The integrated wire tube 16 is fixedly connected with a data processing module. A conduction cavity 11 is provided in the covering housing 10, and a working fluid is provided in the conduction cavity 11. The working fluid is incompressible, and the stress sensor 18 is located in the working fluid;

[0039] The stress sensor 18 is wired through the integrated wire tube 16 and then follows the covering housing 10 to be integrally embedded in the concrete before casting. The data processing module is connected to the stress sensor 18 through the integrated wire tube 16 to collect and analyze the stress detection data, so as to perform strength analysis on the cast concrete structure; The integrated wire tube 16 located outside the covering housing 10 can be equipped with a flexible protection tube 15 to improve the safety of being buried inside the concrete; The concrete strength data obtained by the data module through analysis and processing can adopt data transmission access methods such as fixed archiving or instant information technology access, which is convenient for periodically reading or remotely and real-time accessing the strength condition data detected by the stress sensor 18.

[0040] The covering housing 10 conducts the strain stress of the concrete to pressurize the working fluid in the conduction cavity 11. According to Pascal's principle, the pressure at all positions of the working fluid inside the conduction cavity 11 increases to the same value at this time. The stress sensor 18 is in close contact with the incompressible working fluid in the conduction cavity 11. The working fluid in the conduction cavity 11 uniformly transfers the detected stress to the stress sensor 18, so as to continuously detect the pressure change of the working fluid in the conduction cavity 11 caused by the concrete stress conducted by the conduction block 20. Furthermore, by comparing the elastic deformation stress limit value of the elastic modulus volume change of the concrete structure itself, the concrete strength state is obtained. By tightly and continuously conducting the concrete stress on the contact surface to the stress sensor 18 through the working fluid, it can avoid the local strain stress in the concrete from concentrating in a local range and directly conducting to the sensing part of the stress sensor 18 inertially, thus avoiding the detection distortion and functional damage caused by too large fluctuations in the strain stress sensing of the stress sensor 18.

[0041] It improves the integrity of the concrete detection stress conduction, reduces the possibility of extreme value distortion in concrete stress detection, can obtain more accurate extreme values of concrete strain detection, improves the continuity and accuracy of the stress detection data transmission and processing of the concrete strength detection device, and improves the informatization and automation degree of concrete strength detection.

[0042] The stress sensor 18 can adopt a fiber Bragg grating sensor, which can improve the stability and response effect of stress detection when buried inside the concrete, and is convenient for adapting to the long-term detection of concrete strength.

[0043] Refer to Appendix Figure 1 to Appendix Figure 4As shown, the covering housing 10 has a rigid structure. When the covering housing 10 is stressed inside the concrete, it can maintain the spatial volume of the conduction cavity 11. A negative pressure volume change cavity 22 is provided inside the side wall of the conduction cavity 11. A conduction block 20 is slidably connected inside the negative pressure volume change cavity 22. When the conduction block 20 conducts the concrete stress into the conduction cavity 11, it always maintains a sliding trend of pressing the working fluid inside the conduction cavity 11 for pressurization; the conduction block 20 can slide within a local range inside the side wall of the negative pressure volume change cavity 22 in the direction of the concrete, facilitating the expansion of the communication space between the negative pressure volume change cavity 22 and the conduction cavity 11 when the conduction block 20 is subjected to the force of the concrete tensile action to generate negative pressure, while maintaining the sealing state between the conduction block 20 and the side wall of the negative pressure volume change cavity 22, adapting to the long-term detection of the strength detection device buried in the concrete;

[0044] When the covering housing 10 has a rigid structure, when the covering housing 10 is subjected to an external force, it hardly deforms and loses the external force it conducts; in the actual production process, the material or structure of the covering housing 10 can be approximately regarded as a rigid structure when it can withstand the expected peak acting force in the concrete to be detected without deformation, so as to ensure that the working fluid arranged inside the conduction cavity 11 completely receives the concrete stress transmitted by the covering housing 10, avoiding the loss of the concrete stress during the transmission process and avoiding the failure of the concrete strength detection;

[0045] When the contact surface of the conduction block 20 connected to the conduction cavity 11 is subjected to the force of the extrusion action conducted by the contact end of the conduction block 20 and the concrete, the concrete strain stress squeezes the working fluid through the contact surface of the conduction block 20 connected to the conduction cavity 11. The stress sensor 18 detects the concrete strain stress guided and transmitted through the conduction block 20 and the working fluid, so as to conduct and collect the concrete strain stress in a directional manner, facilitating the separation of the stress in a single direction from the internal stress of the concrete for detection, and the detected stress direction separated can be the main stress direction in which the concrete strength is more affected;

[0046] In addition, a conduction support 21 can be arranged on the force-bearing end surface of the conduction block 20 in the direction of the contact surface with the concrete, so as to improve the stability and uniformity of the transmission of the concrete strain stress by the conduction block 20;

[0047] The conduction block 20 can separate the interference of the coupling of the internal stresses in all directions of the concrete, reduce the detection noise of the directional strength of the concrete, improve the detection accuracy of the directional strength of the concrete, and obtain a more accurate concrete strength detection result.

[0048] Refer to Appendix Figure 1 to Appendix Figure 4 and Appendix Figure 6As shown in the figure, a negative pressure sliding cavity 23 is provided inside the side wall of the negative pressure volume change cavity 22. A negative pressure matching block 25 is provided on the conduction block 20. The negative pressure sliding cavity 23 accommodates the negative pressure matching block 25 to slide to change the size of the space volume communicating the conduction cavity 11 and the negative pressure volume change cavity 22. A first guiding spring 24 is fixedly connected inside the side wall of the negative pressure sliding cavity 23 away from the direction of the working fluid in the conduction cavity 11. The other end of the first guiding spring 24 is fixedly connected to the negative pressure matching block 25. The first guiding spring 24 plays a guiding role, so as to promote the rapid restoration of balance of the negative pressure and positive pressure changes; a communication space is provided at the position where the negative pressure volume change cavity 22 communicates with the conduction cavity 11. The negative pressure sliding cavity 23 provides a sliding stroke for the conduction block 20 to expand the volume of the communication space between the negative pressure volume change cavity 22 and the conduction cavity 11.

[0049] The negative pressure sliding cavity 23 is movably connected to the conduction block 20 through the negative pressure matching block 25, providing a volume change space for generating negative pressure in the conduction cavity 11. The covering shell 10 and the conduction block 20 are buried inside the concrete and are adhesively contacted by the concrete strain stress. When the concrete stress exerts a squeezing effect on the covering shell 10 and the conduction block 20, causing the covering shell 10 and the conduction block 20 to tend to be relatively close, the working fluid pressure detected by the stress sensor 18 is positive pressure.

[0050] On the contrary, when the concrete strain stress exerts a tensile effect on the covering shell 10 and the conduction block 20, the conduction block 20 and the covering shell 10 move relatively away from each other. The conduction block 20 slides relatively toward the concrete side inside the negative pressure volume change cavity 22, thereby expanding the volume of the communication space between the conduction cavity 11 and the negative pressure volume change cavity 22. The pressure state of the incompressible working fluid in the conduction cavity 11 undergoes a sudden change, and the working fluid pressure detected by the stress sensor 18 is negative pressure.

[0051] When the pressure state of the working fluid detected by the stress sensor 18 undergoes a positive pressure negative mutation, the relative motion state between the covering shell 10 and the conduction block 20 is determined. Thus, it can be analyzed that the concrete at the strength detection position exerts a tensile force or a squeezing force on the conduction block 20. Stress sensors 18 and covering shells 10 can be arranged at multiple positions inside the concrete for stress detection. By comparing and analyzing the directional pressure states detected by the stress sensors 18 at multiple detection positions, the occurrence state and direction of the internal strain stress of the concrete on the lines of multiple strength detection positions can be obtained. Thus, the distribution state of the concrete strength in the detection direction can be obtained, reducing the influence of the coupling degree of the directionality of the concrete stress on the accuracy of strength detection, and improving the directionality and accuracy of concrete strength detection; it can cope with the ambiguity of the strength detection results caused by the high degree of coupling of the concrete stress vector.

[0052] In addition, when gaps are generated inside the concrete, the buried contact surfaces of the covering housing 10 or the conduction block 20 with the concrete become a state where the force transmission is disengaged. Under the guiding action of the first guiding spring 24, relative movement begins between the covering housing 10 and the conduction block 20 until the pressure in the conduction cavity 11 returns to the equilibrium state. At this time, the stress value detected by the stress sensor 18 stagnates at the reference pressure of the working fluid inside the conduction cavity 11. By combining and comparing the magnitudes of stress detections at multiple detection points and based on the distribution state of the stagnation points of the stress detection values, it is possible to determine whether the detection position is inside a gap; facilitating the direct detection of the gap occurrence state, improving the convenience and accuracy of detecting the state of gaps generated inside the concrete, and enhancing the early warning effect of concrete strength detection.

[0053] Refer to the appended Figure 3 to the appended Figure 5 As shown, a detection housing 30 is fixedly connected inside the side wall of the conduction cavity 11. A detection cavity 31 is provided inside the detection housing 30. The same working fluid is provided inside the detection cavity 31. A detection transfer slider 33 is slidably connected inside the side wall of the detection cavity 31 facing the conduction cavity 11. Both ends of the detection transfer slider 33 are respectively located inside the detection cavity 31 and the conduction cavity 11. The detection transfer slider 33 transfers the pressure inside the conduction cavity 11 to the detection cavity 31. The stress sensor 18 is located inside the detection cavity 31. The integrated wire tubes 16 at the inlet and outlet ends of the covering housing 10 can be wired and connected to the stress sensor 18 through the layout holes 17. A second guiding spring 34 is fixedly connected between the end wall of the detection cavity 31 facing the conduction cavity 11 and the detection transfer slider 33. The second guiding spring 34 can play a guiding role in breaking the balance under the condition of generating negative pressure inside the detection cavity 31, guiding the detection transfer slider 33 to slide to balance the pressures at both ends of the detection transfer slider 33;

[0054] By disposing the detection housing 30 and the detection transfer slider 33 inside the conduction cavity 11, under the conduction action of the detection transfer slider 33, according to Pascal's principle, the pressure lifted by the conduction block 20 inside the conduction cavity 11 drives the detection transfer slider 33 to maintain a sliding trend of squeezing the working fluid inside the detection cavity 31. The detection transfer slider 33 makes the pressure of the working fluid inside the detection cavity 31 change linearly with the pressure inside the conduction cavity 11, so as to detect the concrete strain stress guided and transmitted by the conduction block 20 through the stress sensor 18;

[0055] Through the pressure conduction of the working fluid, it is possible to decouple the stress detection direction and the layout direction of the strength detection device, increasing the response path of the strength detection device to the concrete stress detection, facilitating the reasonable layout of the sensing structure of the strength detection device, reducing the volume of the strength detection device, and improving the sensing stability of the strength detection device. At the same time, during the concrete pouring and forming process when the strength detection device is buried, it reduces the possibility of the concrete damaging the attitude of the strength sensing device and reducing the detection accuracy, and also reduces the impact of burying the detection device inside the concrete on the concrete strength.

[0056] Refer to the appendix Figure 5 As shown, the force conduction area of the detection transfer slider 33 in the detection cavity 31 is larger than the force conduction area of the detection transfer slider 33 in the conduction cavity 11, and the integrated wire tube 16 is fixedly connected inside the side wall of the detection cavity 31;

[0057] The detection transfer slider 33 can reduce the pressure from the concrete strain stress in the conduction cavity 11 and then conduct it into the detection cavity 31 for detection, reducing the detected stress of conduction, expanding the limit value of the concrete stress detection by the strength detection device, reducing the load of the strength detection device on the concrete stress detection, and improving the service life of the concrete strength detection device;

[0058] In addition, the detection transfer slider 33 scales the ratio of its two ends linearly according to the stress magnitude, which can reduce the resolution data level of the strength detection device and improve the miniaturization and informatization performance of the detection equipment.

[0059] Refer to the appendix Figure 3 and the appendix Figure 4 As shown, the conduction force area of the detection transfer slider 33 in the conduction cavity 11 is smaller than the conduction force area of the conduction block 20 in the conduction cavity 11; according to Pascal's principle, the acting force of the detection transfer slider 33 conducting pressure is linearly related to the magnitude of the concrete strain stress conducted by the conduction block 20. When the force area of the detection transfer slider 33 conducting pressure in the conduction cavity 11 is smaller than the area of the conduction block 20 conducting the concrete strain stress in the conduction cavity 11, the acting force of the detection transfer slider 33 conducting pressure is smaller than the concrete strain stress conducted by the conduction block 20 into the conduction cavity 11, which can reduce the reference pressure value of the detection transfer slider 33 conducting from the conduction cavity 11 into the detection cavity 31. By sequentially reducing the concrete stress through the conduction block 20 and the detection transfer slider 33 and then transferring it to the stress sensor 18 for detection, it can further reduce the load of the detected stress on the concrete strength detection device and further reduce the volume of the concrete strength detection device and its impact on the concrete strength.

[0060] Refer to the appendix Figure 1 to the appendix Figure 6As shown in the figure, a partition layer 12 is provided in the conduction cavity 11. The partition layer 12 is a rigid body structure. The partition layer 12 divides the conduction cavity 11 to form an auxiliary sensing cavity 13. In the side wall of the auxiliary sensing cavity 13 away from the partition layer 12, conduction blocks 20 with the same structure are provided. A rigid body structure guiding pipe is fixedly connected in the partition layer 12. One end of the guiding pipe located outside the auxiliary sensing cavity 13 is fixedly connected with a collecting pipe seat 36. A collecting cavity 37 is provided in the collecting pipe seat 36. The collecting cavity 37 communicates with the auxiliary sensing cavity 13. At the other end of the collecting pipe seat 36, a group of detection shells 30, detection cavities 31, stress sensors 18 and detection transfer sliders 33 with the same structure are provided. The detection transfer slider 33 transfers and balances the pressure between the auxiliary sensing cavity 13 and the detection cavity 31 through the collecting cavity 37;

[0061] By providing the partition layer 12 to divide the conduction cavity 11 into the conduction cavity 11 and the auxiliary sensing cavity 13, and arranging conduction blocks 20 with the same structure in the auxiliary sensing cavity 13, and arranging a plurality of conduction blocks 20 on the outer side of the covering shell 10 to receive and conduct the concrete stress, and then through the rigid body structure guiding pipe installed in the partition layer 12, the concrete stress conducted by the conduction blocks 20 in the auxiliary sensing cavity 13 is transferred to the corresponding detection cavity 31 through the working fluid in the collecting cavity 37 and the guiding pipe for detection; when a plurality of detection shells 30 are arranged in the covering shell 10, the stress conducted by the conduction blocks 20 is transmitted through the wiring of the guiding pipe. At the same time, since the diameter of the optical fiber core is relatively thin, it can be appropriately integrated in the same optical fiber cable. Therefore, it is also convenient to respectively summarize and connect the wires at the inlet and outlet ends of the strength detection device in the wire pipe. In this way, multiple reverse concrete stresses can be detected at the embedding point of the strength detection device. According to different concrete pouring and load-bearing categories, it is easy to arrange the strength detection device in the key strength detection direction;

[0062] When a plurality of conduction blocks 20 are arranged in the same covering shell 10, the stress detected by the conduction blocks 20 in the key strength direction is the main basis for concrete strength detection and analysis. For the concrete stress detected by the conduction blocks 20 in other positions, according to the different actual directions, when summarizing the measured stress analysis data for concrete strength analysis, appropriate weights can be assigned according to the influence of the force in this direction on the concrete strength, or the concrete strength judgment result can be obtained through reasonable mechanical analysis, so as to make a clearer and more reasonable judgment on the concrete strength;

[0063] The concrete strain stress in different directions is decomposed through the partition layer 12, the concrete stress detection direction is increased, the coupling of the concrete stress vector is reduced, the verification convenience of the concrete directional strength detection is improved, the concrete directional strength detection noise caused by the coupling of the detection stresses in each direction is reduced, and the accuracy of the concrete directional strength detection is improved;

[0064] At the same time, the concrete stress is decomposed into detections in different directions through the separation layer 12 and the guide pipe of the rigid structure, which facilitates the integrated layout of multiple strength detection sensors, reduces the requirements of the integrated multi-directional stress detection on the structure of the strength detection device, improves the regularity of the layout trajectory of the sensor multi-directional detection of concrete strength, reduces the amplitude of the detection fluctuation of the sensing component caused by the direct transmission of concrete stress inertia to the strength detection device, and further reduces the possibility of sensor detection distortion caused by the layout trajectory.

[0065] Refer to the attached Figure 1 To Attachment Figure 6 As shown, more than one partition layer 12 is provided in the conduction cavity 11, and the partition layer 12 divides the conduction cavity 11 into the conduction cavity 11 and more than one auxiliary sensing cavity 13, and the stress conduction direction of the conduction block 20 in the auxiliary sensing cavity 13 and the stress conduction direction of the conduction block 20 in the conduction cavity 11 are perpendicular to each other;

[0066] In addition, taking the stress transmission direction of the conductive block 20 on the side wall of the conductive cavity 11 as the axis, multiple sets of independent and identical conductive cavities 11, detection housings 30 and stress sensors 18 are arranged around the circumference of the axis, and each set of strength detection devices is integrated together, which can also achieve the same concrete stress distribution detection effect;

[0067] By separating a plurality of auxiliary sensing cavities 13 in the covering shell 10, the detection stress direction conducted by the conduction block 20 in the auxiliary sensing cavity 13 is distributed in the circumferential direction around the detection stress conduction direction of the conduction block 20 in the conduction cavity 11, and the concrete stress is decomposed and conducted to the stress sensor 18 corresponding to each detection direction in the vertical direction for detection, thereby detecting the concrete stress distribution intersecting with the concrete stress direction conducted by the conduction block 20 in the conduction cavity 11 within the acute angle range, detecting and verifying the main concrete stress direction conducted in the conduction cavity 11, obtaining a more accurate distribution state of concrete directional strength and the stress interfering with this direction, and improving the regularity of the layout and installation;

[0068] Improve the decomposition accuracy of concrete strain stress vector, improve the accuracy of quantitative analysis of concrete strength in all directions, can intuitively transmit different concrete strength parameters through the decomposed stress test results, improve the richness of the transmission parameters of concrete strength test data, reduce the complexity of information data processing, and improve the convenience and versatility of concrete strength testing;

[0069] Meanwhile, in terms of the combined use of new-generation information technologies, the precise angle of the concrete stress direction conducted between multiple conduction blocks 20 is variable. It can adjust the included angle between different stress detection directions according to the specific concrete load-bearing and usage states, improve the resistance performance of the strength detection device to the stress load during the concrete pouring and forming process, reduce the difficulty of detecting data analysis and processing, facilitate the formation of a spatial coordinate system for the stress detection direction, improve the convenience of energy supply expansion of the concrete strength detection device, improve the analysis and utilization efficiency of detection data, and improve the automation degree and convenience of concrete strength detection.

[0070] The above are only illustrative specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A building concrete strength detection device, comprising an integrated wire tube (16) and a cover shell (10), wherein the integrated wire tube (16) is provided with a stress sensor (18), the stress sensor (18) is arranged in the cover shell (10), the cover shell (10) transmits stress to the stress sensor (18), and the integrated wire tube (16) is fixedly connected with a data processing module, characterized in that: A conduction cavity (11) is provided in the covering shell (10), a working fluid is provided in the conduction cavity (11), the working fluid is incompressible, and the stress sensor (18) is located in the working fluid; The covering shell (10) is a rigid structure, a negative pressure variable cavity (22) is provided in the side wall of the conduction cavity (11), a conduction block (20) is slidably connected in the negative pressure variable cavity (22), and the conduction block (20) conducts stress to the working fluid; A negative pressure sliding chamber (23) is provided in the side wall of the negative pressure variable chamber (22), a connecting space is provided at the position where the negative pressure variable chamber (22) and the conducting chamber (11) are connected, and the negative pressure sliding chamber (23) provides a sliding stroke for generating negative pressure.

2. A building concrete strength detection device according to claim 1, characterized in that: The stress sensor (18) is a fiber grating sensor.

3. A building concrete strength detection device according to claim 1 or 2, characterized in that: A detection housing (30) is fixedly connected to the side wall of the conduction cavity (11), a detection cavity (31) is provided in the detection housing (30), the detection cavity (31) is provided with the same working fluid, a detection transfer slider (33) is slidably connected to the side wall of the detection cavity (31) in the direction of the conduction cavity (11), two ends of the detection transfer slider (33) are respectively located in the detection cavity (31) and in the conduction cavity (11), the detection transfer slider (33) transfers the pressure in the conduction cavity (11) to the detection cavity (31), and the stress sensor (18) is located in the detection cavity (31).

4. A building concrete strength detection device according to claim 3, characterized in that: The force conduction area of ​​the detection transfer slider (33) in the detection cavity (31) is larger than the force conduction area of ​​the detection transfer slider (33) in the conduction cavity (11).

5. A building concrete strength detection device according to claim 3, characterized in that: The conductive force-bearing area of ​​the detection transfer sliding block (33) in the conductive cavity (11) is smaller than the conductive force-bearing area of ​​the conductive block (20) in the conductive cavity (11).

6. A building concrete strength detection device according to claim 3, characterized in that: A partition layer (12) is provided in the conduction cavity (11), the partition layer (12) being a rigid structure. The partition layer (12) partitions the conduction cavity (11) to form an auxiliary sensing cavity (13). The conduction block (20) of the same structure is provided in the side wall of the auxiliary sensing cavity (13) away from the partition layer (12). A guide pipe of the rigid structure is fixedly connected in the partition layer (12). One end of the guide pipe located outside the auxiliary sensing cavity (13) is fixedly connected to a collecting pipe seat (36). A collecting cavity (37) is provided in the collecting pipe seat (36). The collecting cavity (37) is communicated with the auxiliary sensing cavity (13). A group of the detection housing (30), the detection cavity (31), the stress sensor (18) and the detection transfer slider (33) of the same structure are provided at the other end of the collecting pipe seat (36). The detection transfer slider (33) transfers and balances the pressure between the auxiliary sensing cavity (13) and the detection cavity (31) through the collecting cavity (37).

7. A building concrete strength detection device according to claim 6, characterized in that: The conduction cavity (11) is provided with a number of separation layers (12) greater than one, the separation layers (12) separating the conduction cavity (11) into a conduction cavity (11) and a number of auxiliary sensing cavities (13) greater than one, and an angle between stress conduction directions of the conduction blocks (20) in the auxiliary sensing cavities (13) and the conduction blocks (20) in the conduction cavity (11) is an acute angle.

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