Building concrete strength detection device

Abstract

The invention discloses a building concrete strength detection device, relates to the technical field of civil engineering concrete detection, and aims to solve the problems of strength detection extreme value distortion caused by concrete stress inertia and strength detection result fuzziness caused by high concrete stress vector coupling degree. According to the concrete strength detection device, the stress sensor, the conduction cavity and the working fluid are arranged, so that the possibility of concrete stress detection extreme value distortion is reduced, and the continuity and the accuracy of stress detection data transmission processing of the concrete strength detection device are improved. By arranging the detection shell, the detection transmission sliding block, the detection cavity and the stress sensor, the limit value of the strength detection device on concrete stress detection can be increased. By arranging the separation layer, the auxiliary sensing cavity, the conduction block, the detection transmission sliding block and the guide pipeline, the concrete directional strength detection noise caused by all-directional detection stress coupling is reduced, and the all-directional quantitative analysis accuracy of the concrete strength is improved.

Description

Technical Field

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

[0002] Civil engineering building structures usually use reinforced concrete as the main load-bearing structure. The concrete structure formed by mixing concrete and steel bars has good load-bearing capacity, corrosion resistance and fire resistance, and has a wide range of applications. Usually, the concrete structure itself has a certain range of elastic modulus tolerance elastic deformation; during the load-bearing process, when the elastic deformation caused by stress is within the deformation range, the concrete structure is not easy to be damaged; when the stress of the concrete structure exceeds the range of elastic modulus tolerance, the concrete structure will have cracks, damage and other strength reduction situations. When the reinforced concrete structure is actually produced and cast, there is usually a protective layer on the surface of the concrete structure. When the concrete structure has cracks and damage due to strain, it is difficult to visually detect, and the estimation and detection of the strength of the concrete structure will be unpredictable, which is easy to cause significant losses.

[0003] In the concrete strength detection or flaw detection method, the rebound based on the feedback of the surface hardness of the concrete material and the acoustic wave method nondestructive detection method based on the sudden change feedback of the acoustic wave propagating in the concrete material are commonly used; the lossy strength detection methods of concrete structures are diverse, but they have gradually failed to meet the needs of industrial development. At present, the application of a 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 automation detection. In the existing concrete strength detection method, a relatively small sensing device that does not affect the casting strength of the reinforced concrete structure is buried in the concrete to intuitively detect the internal stress of the concrete, and then the change of concrete strength is obtained by analyzing and processing the detection results of the sensing device. Fiber Bragg grating sensors have a good application foundation in the field of concrete strain detection and are common sensing devices buried in concrete for strain monitoring. However, in most devices that directly bury fiber grating sensors in concrete for detection, it is still difficult to detect concrete strength efficiently and accurately, and it is difficult to meet the long-term automatic monitoring needs of the new generation of information technology.

[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: 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; 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 concrete strength detection devices are improved, and the informatization and automation level of concrete strength detection is improved.

[0008] Preferably, the stress sensor is a fiber grating sensor.

[0009] 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; 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.

[0010] 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; 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.

[0011] 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; 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.

[0012] 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; 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.

[0013] 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; 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.

[0014] 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; 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; 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.

[0015] 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; 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

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1It is a three-dimensional structural schematic diagram of a building concrete strength detection device of the present invention; Figure 2 yes Figure 1 A schematic diagram of the main view; Figure 3 yes Figure 2 Schematic diagram of the left side; Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A; Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle; Figure 6 yes Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0018] Figure numbers: covering shell 10; conduction cavity 11; partition layer 12; auxiliary sensing cavity 13; flexible protective tube 15; integrated wire tube 16; layout hole 17; stress sensor 18; conduction block 20; conduction bracket 21; negative pressure capacity variable cavity 22; negative pressure sliding cavity 23; first guide spring 24; negative pressure matching block 25; detection shell 30; detection cavity 31; detection transfer slider 33; second guide spring 34; collecting tube seat 36; collecting cavity 37. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0020] The specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on another element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art 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 related listed items.

[0022] Embodiment 1 See attached Figure 1 To Attachment Figure 4 As shown, the present invention provides a building concrete strength detection device, including an integrated wire tube 16 and a covering shell 10, the covering shell 10 can be made of concrete or a polymer with strong corrosion resistance, the integrated wire tube 16 is provided with a stress sensor 18, the stress sensor 18 is arranged in the covering shell 10, the covering shell 10 transmits the concrete strain stress to the stress sensor 18, the integrated wire tube 16 is fixedly connected with a data processing module, the covering shell 10 is provided with a conduction cavity 11, the conduction cavity 11 is provided with a working fluid, the working fluid is incompressible, and the stress sensor 18 is located in the working fluid; The stress sensor 18 is wired through the integrated wire tube 16 and then buried in the concrete with the covering shell 10 before casting. The data processing module connects to the stress sensor 18 through the integrated wire tube 16 to collect and analyze stress detection data, thereby performing strength analysis on the cast concrete structure. The integrated wire tube 16 located outside the covering shell 10 can be equipped with a flexible protective tube 15 to improve the safety of being buried inside the concrete. The concrete strength data obtained by the analysis and processing of the data module can be accessed by data transmission methods such as fixed archiving or real-time information technology access, which is convenient for periodic reading or remote real-time access to the strength status data detected by the stress sensor 18. The strain stress of the concrete transmitted by the covering shell 10 pressurizes the working fluid in the conduction cavity 11. According to the Pascal principle, the pressure at all positions of the working fluid in 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 transmits the stress detected by the conduction to the stress sensor 18 evenly, thereby continuously detecting the pressure change of the working fluid in the conduction cavity 11 caused by the concrete stress transmitted by the conduction block 20, and then obtaining the concrete strength state by comparing the elastic deformation stress limit value of the elastic modulus capacity change of the concrete structure itself. The concrete stress of the contact surface is closely and continuously transmitted to the stress sensor 18 by the working fluid, which can avoid the local strain stress in the concrete from being concentrated in a local range and inertially transmitted directly to the sensing part of the stress sensor 18, thereby avoiding the detection distortion and functional damage caused by the large fluctuation of the strain stress sensing of the stress sensor 18; It improves the integrity of concrete stress transmission, 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 stress detection data transmission and processing of concrete strength detection device, and improves the informatization and automation level of concrete strength detection.

[0023] The stress sensor 18 may be a fiber grating sensor, which can improve the stability and response effect of stress detection when buried inside concrete, and is convenient for adapting to long-term detection of concrete strength.

[0024] See attached Figure 1 To Attachment Figure 4 As shown, the covering shell 10 is a rigid structure. When the covering shell 10 is subjected to stress inside the concrete, the spatial volume size of the conducting cavity 11 can be maintained. A negative pressure variable cavity 22 is arranged in the side wall of the conducting cavity 11. A conducting block 20 is slidably connected in the negative pressure variable cavity 22. When the conducting block 20 conducts concrete stress into the conducting cavity 11, it always maintains the sliding tendency of the working fluid in the conducting cavity 11 to pressurize. The conducting block 20 can slide toward the concrete in a local range in the side wall of the negative pressure variable cavity 22, so that when the conducting block 20 is subjected to the tensile force of the concrete, the size of the connecting space between the negative pressure variable cavity 22 and the conducting cavity 11 is expanded to generate negative pressure, and at the same time, the sealing state between the conducting block 20 and the side wall of the negative pressure variable cavity 22 is maintained, so that the strength detection device is buried in the concrete for long-term detection. When the covering shell 10 is a rigid structure, the covering shell 10 hardly deforms and loses the external force it transmits when subjected to external force; in the actual production process, the material or structure used for the covering shell 10 can be approximately regarded as a rigid structure if it can withstand the expected peak force in the concrete to be tested without deformation, thereby ensuring that the working fluid set in the conduction cavity 11 completely receives the concrete stress transmitted by the covering shell 10, avoiding the loss of concrete stress during the transmission process, and avoiding the failure of concrete strength detection; When the contact surface between the conductive block 20 and the conductive cavity 11 is subjected to the extrusion force transmitted by the conductive block 20 and the contact end of the concrete, the concrete strain stress squeezes the working fluid through the contact surface between the conductive block 20 and the conductive cavity 11, and the stress sensor 18 detects the concrete strain stress guided and transmitted by the conductive block 20 and the working fluid, thereby directionally transmitting and collecting the concrete strain stress, which is convenient for separating the stress in a single direction from the internal stress of the concrete for detection. The separated detection stress direction can be the main stress direction that is most affected by the concrete strength. In addition, a conductive bracket 21 may be provided on the force-bearing end surface of the conductive block 20 in the direction of the contact surface with the concrete, so as to improve the stability and uniformity of the conductive block 20 in transmitting the strain stress of the concrete; The conductive block 20 can separate the interference of the isotropic stress coupling inside 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 more accurate concrete strength detection results.

[0025] See attached Figure 1 To Attachment Figure 4 And attached Figure 6 As shown, a negative pressure sliding chamber 23 is provided in the side wall of the negative pressure variable chamber 22, and a negative pressure matching block 25 is provided on the conduction block 20. The negative pressure sliding chamber 23 accommodates the sliding of the negative pressure matching block 25 to change the size of the space volume connected between the conduction chamber 11 and the negative pressure variable chamber 22. A first guide spring 24 is fixedly connected to the side wall of the negative pressure sliding chamber 23 away from the working fluid direction in the conduction chamber 11, and the other end of the first guide spring 24 is fixedly connected to the negative pressure matching block 25. The first guide spring 24 plays a guiding role, thereby promoting the rapid restoration of balance between the negative pressure and positive pressure changes; a connecting space is provided at the connecting position between the negative pressure variable chamber 22 and the conduction chamber 11, and the negative pressure sliding chamber 23 provides the conduction block 20 with a sliding stroke to expand the connecting space volume between the negative pressure variable chamber 22 and the conduction chamber 11; The negative pressure sliding chamber 23 is movably connected to the conductive block 20 through the negative pressure matching block 25, providing a variable space for the conductive chamber 11 to generate negative pressure. The covering shell 10 and the conductive block 20 are buried in the concrete and are subjected to the concrete strain stress of the adhesion contact. The concrete stress exerts an extrusion effect on the covering shell 10 and the conductive block 20, so that the covering shell 10 and the conductive block 20 tend to keep relatively close. The working fluid pressure detected by the stress sensor 18 is positive pressure; On the contrary, when the concrete strain stress exerts a tensile effect on the covering shell 10 and the conductive block 20, the conductive block 20 is relatively far away from the covering shell 10, and the conductive block 20 slides relatively toward the concrete side in the negative pressure volume-changing chamber 22, thereby expanding the volume of the connecting space between the conductive chamber 11 and the negative pressure volume-changing chamber 22, and the pressure state of the incompressible working fluid in the conductive chamber 11 changes suddenly, and the working fluid pressure detected by the stress sensor 18 is negative pressure; When the working fluid pressure state detected by the stress sensor 18 changes suddenly from positive pressure to negative pressure, the relative motion state between the mapped covering shell 10 and the conductive block 20 is determined, so as to analyze whether the concrete at the strength detection position exerts a tensile force or an extrusion force on the conductive block 20. Stress sensors 18 and covering shells 10 at multiple positions can be arranged in 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 strain stress inside the concrete on the lines of multiple strength detection positions can be obtained, so as to obtain the distribution state of the concrete strength in the detection direction, thereby reducing the influence of the directional coupling degree of the concrete stress on the accuracy of the strength detection, and improving the directionality and accuracy of the concrete strength detection; it can deal with the fuzzy strength detection results caused by the high degree of coupling of the concrete stress vector; In addition, when a gap is generated inside the concrete, the buried contact surface between the covering shell 10 or the conductive block 20 and the concrete becomes detached from the transmission force. Under the guidance of the first guide spring 24, the covering shell 10 and the conductive block 20 begin to move relative to each other until the pressure in the conductive cavity 11 returns to a balanced state. At this time, the stress value detected by the stress sensor 18 stagnates at the reference pressure of the working fluid inside the conductive cavity 11. Combined with the comparison of the stress detection sizes between multiple detection points, it can be concluded whether the detection position is in the gap according to the distribution state of the stagnation points of the stress detection values. This facilitates direct detection of the occurrence of gaps, improves the convenience and accuracy of detecting the occurrence of gaps inside the concrete, and improves the early warning effect of concrete strength detection.

[0026] See attached Figure 3 To Attachment Figure 5 As shown, a detection shell 30 is fixedly connected to the side wall of the conduction cavity 11, a detection cavity 31 is arranged in the detection shell 30, and the same working fluid is arranged in the detection cavity 31. A detection transfer slider 33 is slidably connected to the side wall of the detection cavity 31 facing the conduction cavity 11, and two ends of the detection transfer slider 33 are respectively located in the detection cavity 31 and 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. The integrated wire tube 16 covering the inlet and outlet ends of the shell 10 can be connected to the stress sensor 18 through the wiring hole 17. A second guide 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. When the second guide spring 34 generates negative pressure in the detection cavity 31, the second guide spring 34 plays a guiding role of breaking the balance, guiding the detection transfer slider 33 to slide and balance the pressure at both ends of the detection transfer slider 33. By arranging the detection housing 30 and the detection transfer slider 33 in the conduction cavity 11, under the conduction effect of the detection transfer slider 33, according to the Pascal principle, the pressure in the conduction cavity 11 raised by the conduction block 20 drives the detection transfer slider 33 to maintain the sliding tendency of squeezing the working fluid in the detection cavity 31, and the detection transfer slider 33 makes the working fluid pressure in the detection cavity 31 change linearly with the pressure in the conduction cavity 11, so that the concrete strain stress guided and transmitted by the conduction block 20 is detected by the stress sensor 18; Through the pressure conduction effect of the working fluid, the stress detection direction and the layout direction of the strength detection device can be decoupled, the response path of the strength detection device to the concrete stress detection is increased, and the sensing structure of the strength detection device is reasonably arranged to reduce the volume of the strength detection device and improve the sensing stability of the strength detection device; at the same time, in the process of pouring and forming concrete in which the strength detection device is buried, the possibility of concrete destroying the posture of the strength sensing device and reducing the detection accuracy is reduced, and at the same time, the influence of burying the detection device inside the concrete on the concrete strength is reduced.

[0027] See attached Figure 5 As shown, the force transmission area of ​​the detection transfer slider 33 in the detection cavity 31 is larger than the force transmission area of ​​the detection transfer slider 33 in the conduction cavity 11, and the integrated wire tube 16 is fixedly connected to the side wall of the detection cavity 31; The detection transmission slider 33 can reduce the pressure from the concrete strain stress in the conduction cavity 11 and transmit it to the detection cavity 31 for detection, thereby reducing the transmitted detection stress, expanding the limit value of the strength detection device for concrete stress detection, and reducing the load of the strength detection device for concrete stress detection, thereby increasing the service life of the concrete strength detection device; In addition, the detection transfer slider 33 can reduce the resolution data level of the strength detection device by scaling its double-end ratio linearly related to the stress magnitude, thereby improving the miniaturization and information performance of the detection equipment.

[0028] See attached Figure 3 and attached Figure 4As shown, the conducting force-bearing area of ​​the detection transfer slider 33 in the conducting cavity 11 is smaller than the conducting force-bearing area of ​​the conducting block 20 in the conducting cavity 11; according to Pascal's principle, the force of the conducting pressure of the detection transfer slider 33 is linearly related to the size of the concrete strain stress conducted by the conducting block 20. When the force-bearing area of ​​the conducting pressure of the detection transfer slider 33 in the conducting cavity 11 is smaller than the area of ​​the conducting concrete strain stress of the conducting block 20 in the conducting cavity 11, the force of the conducting pressure of the detection transfer slider 33 is smaller than the concrete strain stress conducted into the conducting cavity 11 by the conducting block 20, which can reduce the reference pressure value conducted from the conducting cavity 11 by the detection transfer slider 33 into the detection cavity 31. The concrete stress is sequentially reduced by the conducting block 20 and the detection transfer slider 33 and then transmitted to the stress sensor 18 for detection, which can further reduce the load of the detection stress on the concrete strength detection device, and further reduce the volume of the concrete strength detection device and the influence on the concrete strength.

[0029] See attached Figure 1 To Attachment Figure 6 As shown, a partition layer 12 is provided in the conduction cavity 11, and the partition layer 12 is a rigid structure. The partition layer 12 divides the conduction cavity 11 to form an auxiliary sensing cavity 13. A 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 detection housings 30, detection cavities 31, stress sensors 18 and detection transfer sliders 33 of the same structure are provided at the other end of the collecting pipe seat 36. The detection transfer sliders 33 transfer and balance the pressure between the auxiliary sensing cavity 13 and the detection cavity 31 through the collecting cavity 37. The conducting cavity 11 is divided into the conducting cavity 11 and the auxiliary sensing cavity 13 by setting a partition layer 12, and a conducting block 20 with the same structure is set in the auxiliary sensing cavity 13, and multiple conducting blocks 20 are set on the outer side of the covering shell 10 to receive and conduct concrete stress, and then the concrete stress conducted by the conducting block 20 in the auxiliary sensing cavity 13 is transmitted to the corresponding detection cavity 31 for detection through the guiding pipe of the rigid structure installed in the partition layer 12, so as to pass through the collecting cavity 37 and the working fluid in the guiding pipe. When multiple detection shells 30 are arranged in the covering shell 10, the stress transmitted by the conducting block 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, so it is also convenient to collect the wiring in the wire tube at the inlet and outlet ends of the strength detection device. In this way, multiple reverse concrete stresses can be detected at the buried point of the strength detection device, and according to different concrete pouring and load-bearing categories, it is easy to arrange the strength detection device in the key strength detection direction; A plurality of conductive blocks 20 are arranged in the same covering shell 10. The stress detected by the conductive blocks 20 in the key strength direction is the main basis for concrete strength detection and analysis. The concrete stress detected by the conductive blocks 20 in other positions can be different according to the actual direction. When the measured stress analysis data are summarized for concrete strength analysis, appropriate weights can be added 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. The concrete strain stress in different directions is decomposed by 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 directional detection stress is reduced, and the accuracy of the concrete directional strength detection is improved; 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.

[0030] See 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; 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; 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; 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; At the same time, in terms of the joint use of new generation information technology, the precise angle of the direction of concrete stress transmitted between multiple conduction blocks 20 is variable, and the angle between different stress detection directions can be adjusted according to the specific concrete load-bearing capacity and usage status, which can improve the strength detection device's resistance to the stress load in the concrete pouring and molding process, while reducing the difficulty of analyzing and processing the detection data, facilitating the formation of a spatial coordinate system for the stress detection direction, improving the convenience of energy supply expansion of the concrete strength detection device, improving the analysis and use efficiency of the detection data, and improving the degree of automation and convenience of concrete strength detection.

[0031] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes made by a person skilled in the art without departing from the concept and principle 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.

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 2, characterized in that: 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.

4. A building concrete strength detection device according to claim 3, characterized in that: 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.

5. A building concrete strength detection device according to any one of claims 1 to 4, 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).

6. A building concrete strength detection device according to claim 5, 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).

7. A building concrete strength detection device according to claim 5, 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).

8. A building concrete strength detection device according to claim 5, 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).

9. A building concrete strength detection device according to claim 8, 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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