Anchor concrete health monitoring system

Abstract

A health monitoring system for concrete under an anchor, comprising a cement-based sensor and a power supply circuit for powering the cement-based sensor, wherein the cement-based sensor is embedded in concrete in which an anchor is embedded; further comprising: a monitoring resistor, which is arranged in the power supply circuit and outside the concrete; an external measurement circuit, which is arranged outside the concrete and contains a data acquisition instrument for collecting the voltage on the monitoring resistor; a memory, which stores a data set, wherein the data set contains a voltage value and an anchor load value corresponding to the voltage value; an MCU controller, which is connected to the data acquisition instrument and the memory, obtains the voltage collected by the data acquisition instrument in real time, searches the data set according to the voltage, and obtains the corresponding anchor load value. In the present invention, relatively few wires are embedded in the concrete, which is conducive to improving the progress and quality of concrete pouring at the same time.

Description

Technical Field

[0001] The invention relates to an under-anchor concrete health monitoring system, belonging to the field of concrete monitoring. Background Art

[0002] In building structures such as bridge and tunnel structures, anchor rods are usually installed in concrete. After the anchor rods are combined with concrete, the strength and stability of the concrete are increased. At the same time, in building structures, health monitoring of concrete structures helps to detect and troubleshoot early damage to concrete, which is crucial to ensuring the safe service of large infrastructure such as bridge and tunnel structures and the prevention of major geological disasters.

[0003] In recent years, various stress and strain sensing and monitoring systems based on piezoelectric, piezoresistive, magnetoresistive, optical and acoustic effects have been introduced. By embedding sensors into concrete structures, long-term monitoring of structural strain has been preliminarily achieved. Among them, piezoresistive sensors are not affected by external disturbance signals such as static charge and magnetic field, and have reliable service stability. However, the structural monitoring application of traditional metal or polymer-based sensors is restricted by their high cost, insufficient durability and poor compatibility with concrete. Therefore, cement-based sensors came into being.

[0004] Cement-based sensors are sensors with piezoresistive effect formed by the composite of cement matrix and conductive filler. During its elastic deformation stage, it will produce regular changes in resistance due to stress and strain. Through an external measurement circuit, an electrical signal proportional to stress or strain can be obtained, thereby achieving the purpose of monitoring the deformation and load of the concrete structure in which it is embedded. In addition to the advantages of good compatibility with concrete structures and low price, cement-based sensors can also improve the ductility and durability of concrete.

[0005] At present, as mentioned above, an external measuring circuit is used to obtain the change signal of the cement-based sensor, such as the technology in application number CN202311214366.4 and the technology in application number CN202311805652.8, and therefore, the wires of the external measuring circuit need to be buried in the concrete. At the same time, the monitoring operation of the cement-based sensor is based on the power supply of the external circuit, and the wires of the external circuit also need to be buried in the concrete.

[0006] In general, in the current concrete health monitoring system, there are many wires buried in concrete, and there are two main ways to arrange the wires. First, holes are made in the already formed concrete to form wiring holes, and the wires pass through the wiring holes, but this has a relatively large adverse effect on the quality of the concrete. Second, the wiring is done during the pouring of concrete, and the pouring process needs to be controlled in real time to prevent the wires from being broken or fractured. In other words, it is difficult to ensure the quality and progress of concrete pouring at the same time. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present application provides an anchor concrete health monitoring system, which has relatively few wires buried in the concrete, thereby helping to improve both the progress and quality of concrete pouring.

[0008] A health monitoring system for concrete under an anchor comprises a cement-based sensor and a power supply circuit for supplying power to the cement-based sensor, wherein the cement-based sensor is embedded in concrete in which an anchor rod is embedded; and further comprises:

[0009] A monitoring resistor, arranged in the power supply circuit and outside the concrete;

[0010] An external measuring circuit is arranged outside the concrete and includes a data acquisition instrument for collecting the voltage on the monitoring resistor;

[0011] A memory storing a data set, wherein the data set includes a voltage value and an anchor load value corresponding to the voltage value;

[0012] The MCU controller is connected to the data acquisition instrument and the memory, obtains the voltage collected by the data acquisition instrument in real time, searches the data set according to the voltage, and obtains the corresponding anchor load value.

[0013] This monitoring system, unlike the existing technology that directly collects signals from cement-based sensors inside the concrete, instead collects the voltage on the monitoring resistor outside the concrete. Therefore, the hardware equipment of the external measurement circuit can be set outside the concrete, and the number of wires buried in the concrete is relatively small, which is beneficial to improving both the progress and quality of concrete pouring.

[0014] Preferably, the anchor rod and the cement-based sensor are buried in the concrete during the concrete pouring process; the power supply circuit includes a wire and a power supply, and there are at least two anchor rods; a wire channel is provided in two of the anchor rods, one end of the wire channel is located outside the concrete, and the other end is located at the bottom surface of the anchor rod, the wire connected to the power supply is arranged in the wire channel, and the bottom of the anchor rod is fixedly connected with a conductive head connected to the wire; the cement-based sensor has two electrodes, and the two electrodes are respectively in contact with two conductive heads on two different anchor rods to conduct, so that the wires in the two anchor rods, the two electrodes, and the power supply form a complete circuit. This technical solution passes the wires of the power supply circuit inside the anchor rod, and at the same time uses the conductive head to contact and conduct with the electrode, so that the wires of the power supply circuit are not exposed to the concrete, and there is no need to consider the precautions for the wires during the pouring process. The wires have little interference with the pouring, and the quality and progress of the concrete pouring can be better and faster.

[0015] Preferably, the electrode includes a conductive column, the conductive column includes a vertical ring portion and a top cover portion connected to the vertical ring portion, the top cover portion has an avoidance hole coaxially arranged with the vertical ring portion, an insulating sleeve for the anchor rod to pass through is installed on the avoidance hole, the conductive head is located in the conductive column, and the conductive head and the conductive column are connected through a vertically deformable elastic conductive member; the elastic conductive member keeps the conductive column and the conductive head connected when the cement-based sensor sinks. In this technical solution, the conductive head and the conductive column are connected through a vertically deformable elastic conductive member, and the elastic conductive member is provided, the purpose of which is to always keep the conductive column and the conductive head connected when the cement-based sensor sinks, so as to overcome the adverse effects of the cement-based sensor on the pouring quality and progress when it sinks.

[0016] Preferably, the elastic conductive member comprises a conductive spring, one end of which abuts against the top cover portion, and the other end of which abuts against the conductive head, and the conductive head has an abutting portion abutting against the conductive spring.

[0017] Preferably, the elastic conductive member includes a spring sheet, which is located below the conductive head, and includes a connecting portion connected to the conductive head, and a pin portion connected to the connecting portion and used to connect to the vertical ring portion. In this technical solution, the elastic conductive member adopts a spring sheet structure, so that the conductive column can be designed to be flatter, and can withstand greater impact of concrete during concrete pouring, especially horizontal impact. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed.

[0018] Preferably, the pin part rotates around the central axis of the connecting part to form a rotating structure. In this technical solution, the pin part rotates around the central axis of the connecting part to form a rotating structure, which has better deformation ability, meets the larger sinking requirements of cement-based sensors, and ensures the casting quality and progress.

[0019] Preferably, the inner wall of the vertical ring portion is provided with a connecting notch or a connecting protrusion connected to the pin portion.

[0020] Preferably, the conductive head comprises an insulating connection part connected to the anchor rod and a head conductive part embedded in the insulating connection part. This conductive head can prevent the head conductive part from being connected to the anchor rod, thereby preventing the anchor rod from being corroded by electricity.

[0021] Preferably, the inner wall surface of the vertical ring part and the outer side surface of the insulating sleeve are in contact with each other, and the pin part is located directly below the insulating sleeve, and a spring connector for connecting to the connecting part is protrudingly provided at the bottom center of the head conductive part. With this structure, the inner diameter of the vertical ring part can be made as small as possible. When the outer diameter of the vertical ring part remains unchanged, the structural strength of the conductive column is better, and it can withstand greater impact of concrete during concrete pouring. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. If the inner diameter of the vertical ring part is relatively large, the conductive column is easy to deform, and there may be problems with the contact between the conductive column and the conductive head, which will cause problems with the power supply circuit, quality problems with pouring, and the pouring progress will also be affected.

[0022] Preferably, the inner wall surface of the vertical ring part and the outer side surface of the insulating sleeve are in contact with each other, and the lower slot wall on the insulating sleeve for forming the slot is provided with a receiving opening for receiving the conductive spring, and the abutting portion is located within the horizontal projection of the insulating sleeve. With this structure, the inner diameter of the vertical ring part can be made as small as possible. When the outer diameter of the vertical ring part remains unchanged, the structural strength of the conductive column is better, and it can withstand greater impact of concrete during concrete pouring. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. If the inner diameter of the vertical ring part is relatively large, the conductive column is easy to deform, and there may be problems with the contact between the conductive column and the conductive head, which will lead to problems with the power supply circuit, quality problems in pouring, and the pouring progress is also affected.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. The monitoring system of the present invention does not directly collect signals from cement-based sensors inside the concrete like the prior art, but instead collects the voltage on a monitoring resistor outside the concrete. Therefore, the hardware equipment of the external measurement circuit can be set outside the concrete, and the number of wires buried in the concrete is relatively small, which is beneficial to improving both the progress and quality of concrete pouring.

[0025] 2. The monitoring system of the present invention passes the wires of the power supply circuit through the inside of the anchor rod, and uses the conductive head to contact and conduct with the electrode, so that the wires of the power supply circuit are not exposed to the concrete. There is no need to consider the precautions for the wires during the pouring process. The wires have little interference with the pouring, and the quality and progress of the concrete pouring can be better and faster.

[0026] 3. In the monitoring system of the present invention, the conductive head and the conductive column are connected through a vertically deformable elastic conductive part. The elastic conductive part is provided to always keep the conductive column and the conductive head connected when the cement-based sensor sinks, thereby overcoming the adverse effects of the cement-based sensor on the pouring quality and progress when sinking.

[0027] 4. In the monitoring system of the present invention, the elastic conductive part adopts a spring structure, so that the conductive column can be designed to be flatter and can withstand greater impact of concrete during concrete pouring, especially horizontal impact. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed.

[0028] 5. In the monitoring system of the present invention, the pin part rotates around the central axis of the connecting part to form a spiral structure, so that it has better deformation ability, meets the larger sinking requirement of the cement-based sensor, and ensures the casting quality and progress.

[0029] 6. In the monitoring system of the present invention, an insulating sleeve is arranged between the conductive column and the anchor rod, so that the conductive column and the anchor rod are not connected, thereby preventing the anchor rod from rusting due to power supply, thereby protecting the anchor rod.

[0030] 7. In the monitoring system of the present invention, the inner wall surface of the vertical ring portion of the conductive column is fitted with the outer side surface of the insulating sleeve, and the pin portion is located directly below the insulating sleeve. A spring connector for connecting to the connecting portion is protrudingly provided at the bottom center of the head conductive member. With this structure, the inner diameter of the vertical ring portion can be made as small as possible. When the outer diameter of the vertical ring portion remains unchanged, the structural strength of the conductive column is better, and it can withstand greater impact of concrete during concrete pouring. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed.

[0031] 8. The monitoring system in the present invention comprises a conductive head including an insulating connecting component connected to the anchor rod and a head conductive part embedded in the insulating connecting component. The wire passes through the insulating connecting component and is connected to the head conductive part. This conductive head can prevent the head conductive part from being connected to the anchor rod, thereby preventing the anchor rod from being rusted due to electricity.

[0032] 9. In the monitoring system of the present invention, the inner wall surface of the vertical ring part and the outer side surface of the insulating sleeve are in contact, and the lower slot wall on the insulating sleeve used to form the slot is provided with a receiving opening for receiving the conductive spring, and the abutting part is located within the horizontal projection of the insulating sleeve. With this structure, the inner diameter of the vertical ring part can be made as small as possible. When the outer diameter of the vertical ring part remains unchanged, the structural strength of the conductive column is better, and it can withstand greater impact of concrete during concrete pouring. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a simplified structural diagram of the anchor concrete health monitoring system in Example 1;

[0034] Figure 2 This is a connection diagram between the power supply circuit and the cement-based sensor in Example 1;

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0036] Figure 4 for Figure 2 The connection diagram between the middle conductive head and the electrode;

[0037] Figure 5 This is a schematic diagram of the installation of the conductive head in Example 1;

[0038] Figure 6 This is a diagram showing the connection between the conductive head and the electrode in Example 2;

[0039] Figure 7 This is a schematic structural diagram of the elastic conductive member of Example 2;

[0040] Figure 8 This is a diagram showing the connection between the conductive head and the electrode in Example 3;

[0041] Fig. 9 This is a diagram showing the connection between the conductive head and the electrode in Example 4. DETAILED DESCRIPTION

[0042] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] An anchor concrete health monitoring system, such as Figure 1 As shown, it includes a cement-based sensor 1, a power supply circuit 2, a monitoring resistor 3, an external measurement circuit 4, a memory 5, and an MCU controller 6, wherein the cement-based sensor 1 is buried in the concrete in which the anchor 0 is buried and powered by the power supply circuit 2, the upper part of the anchor 0 is exposed outside the concrete, and is used to connect with the building structure to strengthen the building structure, the power supply circuit 2, like the prior art, includes hardware facilities such as a power supply 22 and a wire 21, the monitoring resistor 3 is arranged in the power supply circuit 2 and outside the concrete, the monitoring resistor 3 is specifically connected in series in the power supply circuit 2, the external measurement circuit 4 is arranged outside the concrete, and includes a data acquisition instrument 41 for collecting the voltage on the monitoring resistor 3, the memory 5 stores a data set, the data set includes a voltage value and an anchor load value corresponding to the voltage value, the anchor load value and the corresponding voltage value can be obtained in advance through experiments, the MCU controller 6 is connected to the data acquisition instrument 41 and the memory 5, obtains the voltage collected by the data acquisition instrument 41 in real time, searches the data set according to the voltage, obtains the corresponding anchor load value, and displays the anchor load value on the display screen.

[0045] This monitoring system, unlike the prior art which directly collects the signal from the cement-based sensor 1 inside the concrete, instead collects the voltage on the monitoring resistor 3 outside the concrete. Therefore, the hardware equipment of the external measurement circuit 4 can be set outside the concrete, and the number of wires 21 buried in the concrete is relatively small, which is beneficial to improving both the progress and quality of concrete pouring.

[0046] In the health monitoring system of this embodiment, the anchor rod 0 embedded in the concrete can be embedded in the concrete during the pouring process, that is, the anchor rod 0 is poured in the concrete. The traditional installation method of the anchor rod 0 is to open an anchor hole on the already poured building structure and then install the anchor rod 0. When opening the anchor hole, it is easy to touch the pre-embedded steel bars in the concrete, resulting in a high error rate of opening the hole, and it is also easy to damage the pre-embedded steel bars in the concrete. However, the method of pouring the anchor rod in the concrete does not have such a problem. Similarly, for the cement-based sensor 1 embedded in the concrete, it can be embedded in the concrete during the pouring process, that is, poured in the concrete. The traditional installation method of the cement-based sensor 1 is to open an installation cavity on the already poured building structure and then embed the cement-based sensor 1. When opening the installation cavity, it is easy to touch the pre-embedded steel bars in the concrete, resulting in a high error rate of opening the cavity, and it is also easy to damage the pre-embedded steel bars in the concrete. However, the method of pouring the cement-based sensor 1 in the concrete does not have such a problem.

[0047] Then, the following implementation contents are all based on the anchor rod 0 and cement-based sensor 1 buried in concrete by pouring, and are specially designed for the arrangement of the wire 21 in the power supply circuit 2, with the purpose of overcoming the adverse effects of the wire 21 on the pouring quality and progress during the concrete pouring process.

[0048] Specifically, in the embodiment, the number of anchor rods 0 is at least 2, such as Figure 2-4 As shown, two of them are selected, and a wire channel 01 is set in the anchor rod 0, wherein one end of the wire channel 01 is located outside the concrete, and the other end is located at the bottom surface of the anchor rod 0, and the wire 21 connected to the power supply 22 is arranged in the wire channel 01, and the bottom of the anchor rod 0 is also fixedly connected to a conductive head 02 connected to the wire 21; the cement-based sensor 1 has two electrodes 11, and the two electrodes 11 are respectively in contact with the two conductive heads 02 on two different anchor rods 0 for conduction, so that the wires 21 in the two anchor rods 0, the two electrodes 11, and the power supply 22 form a complete circuit.

[0049] In this structural setting, the wire 21 of the power supply circuit 2 is passed through the anchor rod 0, and the conductive head 02 is used to contact and conduct with the electrode 11. In other words, the wire 21 of the power supply circuit 2 is not exposed in the concrete. When pouring concrete, the anchor rod 0 and the cement-based sensor 1 are placed in a pre-built mold frame, and a steel mesh is pre-built in the mold frame. The steel mesh is not shown in the attached figure. The anchor rod 0 can be fixed on the steel mesh. The cement-based sensor 1 is correspondingly located below the anchor rod 0, and it is ensured that the two electrodes 11 are in contact with the two conductive heads 02. Then, the concrete is poured and compacted. Since the wire 21 of the power supply circuit 2 is not exposed, there is no need to consider the precautions of the wire 21 during the pouring process. The wire 21 has little interference with the pouring, and the quality and progress of the concrete pouring can be better and faster. If there is a wire 21 in the concrete, the concrete will have an impact on the wire 21 itself and the joint between the wire 21 and the electrode 11 during the pouring process, damaging the surface of the wire 21 or breaking the wire or damaging the joint, causing quality problems in the pouring and affecting the pouring progress.

[0050] The applicant also found that the anchor rod 0, as a reinforcing component, often needs to be in a positioned state during pouring to ensure the accuracy of its position after pouring, while the cement-based sensor 1 is just the opposite and often needs to be in a free state in the vertical direction. The purpose is to enable the bottom of the cement-based sensor 1 to be tightly combined with the concrete below the cement-based sensor 1 during the concrete compaction process, otherwise a gap will be generated between the two, affecting the pouring quality. This leads to a phenomenon: during the concrete pouring process, the cement-based sensor 1 has a slight sinking phenomenon, which may be several millimeters, affecting the contact and conductivity performance of the electrode 11 and the conductive head 02, thereby causing adverse interference to the pouring quality and is not conducive to the pouring progress.

[0051] To this end, in the embodiment, Figure 3 As shown, the electrode 11 is redesigned, and its structure includes a conductive column 111, and the conductive column 111 includes a vertical ring portion 1111 and a top cover portion 1112 connected to the vertical ring portion 1111, and the top cover portion 1112 has an avoidance hole 1113 coaxially arranged with the vertical ring portion 1111, and an insulating sleeve 112 for the anchor rod 0 to pass through is installed on the avoidance hole 1113 to prevent the conductive column 111 and the anchor rod 0 from being energized and to prevent the anchor rod 0 from rusting due to the energization, and the conductive head 02 is located in the conductive column 111. At the same time, in the embodiment, the conductive head 02 is connected to the conductive column 111 through a vertically deformable elastic conductive member 113. The purpose of providing the elastic conductive member 113 is to always keep the conductive column 111 and the conductive head 02 connected when the cement-based sensor 1 sinks, so that the casting quality and progress can be better guaranteed.

[0052] The side surface of the insulating sleeve 112 is recessed inward to form an annular groove, which is coaxial with the avoidance hole 1113. The groove is connected to the avoidance hole 1113 by being clamped in the avoidance hole 1113. Moreover, on this basis, fasteners passing through the top cover 1112 and the groove wall parts constituting the groove can be configured to fasten the groove wall parts constituting the groove to the top cover 1112. The fasteners are preferably bolt fasteners made of plastic material. The fasteners are not shown in the drawings. The insulating sleeve 112 can also be connected to the avoidance hole 1113 by other means, such as bonding.

[0053] The elastic conductive member 113 can be a copper conductive spring, one end of which is against the top cover 1112, and the other end is against the conductive head 02. The copper conductive spring has good conductivity, and the cement-based sensor 1 is compressed when sinking. The conductive head 02 has a supporting portion 020 against the conductive spring.

[0054] like Figure 5 As shown, the conductive head 02 includes an insulating connection part 021 connected to the anchor rod 0 and a head conductive part 022 embedded in the insulating connection part 021. The wire 21 passes through the insulating connection part 021 and is connected to the head conductive part 022. The above-mentioned abutting part 020 is a part of the head conductive part 022. In this way, it can be ensured that the wires 21, two electrodes 11, and power supply 22 in the two anchor rods 0 form a complete circuit. This conductive head 02 can prevent the head conductive part 022 from being connected to the anchor rod 0 and prevent the anchor rod 0 from being rusted by electricity. The insulating connection part 021 and the anchor rod 0 can be connected by screws, but not limited to. Of course, in order to make the head conductive part 022 more stable, the head conductive part 022 can also be fastened to the side wall of the insulating connection part 021 by screws, which is not shown in the drawings.

[0055] Embodiment 2:

[0056] Different from the first embodiment, this embodiment adopts another elastic conductive member 113, such as Figure 6-7As shown, the elastic conductive part 113 adopts a copper spring sheet, which is arranged below the conductive head 02, and includes a connecting portion 1131 and a pin portion 1132 connected to the connecting portion 1131, wherein the connecting portion 1131 is connected to the conductive head 02, specifically connected to the head conductive part 022 in the conductive head 02, and the two can be welded and connected by fasteners, and the pin portion 1132 is used to connect with the vertical ring portion 1111, and similarly, the two can be welded and connected by fasteners. When fasteners are used for connection, the inner wall of the vertical ring portion 1111 is provided with a connecting notch or a connecting protrusion for connecting with the pin portion 1132. Under the influence of this spring structure, the conductive column 111 can be designed to be flatter, and can withstand greater impact of concrete during concrete pouring, especially horizontal impact. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. If the conductive column 111 is relatively high, the conductive column 111 is easy to deform, and there may be problems with the contact between the conductive column 111 and the conductive head 02, which will cause problems with the power supply circuit 2, quality problems with pouring, and the pouring progress is also affected.

[0057] On this basis, the pin portion 1132 is further designed so that the pin portion 1132 rotates around the central axis of the connecting portion 1131 to form a spiral structure, which has better deformation ability, meets the larger sinking requirement of the cement-based sensor 1, and ensures the casting quality and progress. If the cement-based sensor 1 sinks more severely but the spring piece is difficult to provide corresponding deformation, it will form a large pulling force on the spring piece, and the spring piece will be easily torn off, thereby causing problems with the power supply circuit 2, casting quality problems, and the casting progress is also affected.

[0058] Embodiment 3:

[0059] Different from Example 2, this example, as Figure 8 As shown, the inner wall surface of the vertical ring portion 1111 and the outer side surface of the insulating sleeve 112 are in contact with each other, that is, the diameters of the two are equal, and the pin portion 1132 is located in the horizontal projection of the insulating sleeve 112. A spring connector 023 for connecting to the connector 1131 is protrudingly provided at the bottom center of the head conductive member 022. With this structure, the inner diameter of the vertical ring portion 1111 can be made as small as possible. When the outer diameter of the vertical ring portion 1111 remains unchanged, the structural strength of the conductive column 111 is better, and the conductive column 111 can withstand greater impact of the concrete during concrete pouring, especially horizontal impact. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. If the inner diameter of the vertical ring portion 1111 is relatively large, the conductive column 111 is easily deformed, and the contact between the conductive column 111 and the conductive head 02 may have problems, thereby causing problems with the power supply circuit 2, quality problems with pouring, and the pouring progress is also affected.

[0060] Embodiment 4: Different from Embodiment 1, this embodiment, see the attached Fig. 9 As shown, the inner wall surface of the vertical ring portion 1111 and the outer side surface of the insulating sleeve 112 are in contact, that is, the diameters of the two are equal, and the lower card slot wall on the insulating sleeve 112 for forming the card slot is provided with a receiving port 112-1 for accommodating the conductive spring, and the abutting portion 020 is located in the horizontal projection of the insulating sleeve 112. With this structure, the inner diameter of the vertical ring portion 1111 can be made as small as possible. When the outer diameter of the vertical ring portion 1111 remains unchanged, the structural strength of the conductive column 111 is better, and it can withstand greater impact of concrete during concrete pouring, especially horizontal impact. Therefore, there are fewer interference factors during pouring, and the pouring quality and progress can be further guaranteed. If the inner diameter of the vertical ring portion 1111 is relatively large, the conductive column 111 is easy to deform, and the contact between the conductive column 111 and the conductive head 02 may have problems, thereby causing problems in the power supply circuit 2, quality problems in pouring, and the pouring progress is also affected.

[0061] The above embodiments are only for describing the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A system for monitoring the health of concrete under an anchor, comprising a cement-based sensor (1) and a power supply circuit (2) for supplying power to the cement-based sensor (1), wherein the cement-based sensor (1) is buried in concrete in which an anchor rod (0) is buried; It is characterized in that Also includes: A monitoring resistor (3) is arranged in the power supply circuit (2) and outside the concrete; An external measurement circuit (4) is arranged outside the concrete and includes a data acquisition instrument (41) for collecting the voltage on the monitoring resistor (3); A memory (5) storing a data set, the data set comprising a voltage value and an anchor load value corresponding to the voltage value; The MCU controller (6) is connected to the data acquisition instrument (41) and the memory (5), and acquires the voltage collected by the data acquisition instrument (41) in real time, searches the data set according to the voltage, and obtains the corresponding anchor load value; The anchor rod (0) and the cement-based sensor (1) are embedded in the concrete during the concrete pouring process; The power supply circuit (2) comprises a wire (21) and a power supply (22), and there are at least two anchor rods (0); A conductor channel (01) is provided in two of the anchor rods (0), one end of the conductor channel (01) is located outside the concrete, and the other end is located on the bottom surface of the anchor rod (0), the conductor (21) connected to the power supply (22) is arranged in the conductor channel (01), and a conductive head (02) connected to the conductor (21) is fixedly connected to the bottom of the anchor rod (0); The cement-based sensor (1) has two electrodes (11), and the two electrodes (11) are respectively in contact with two conductive heads (02) on two different anchor rods (0) to conduct electricity, so that the wires (21) in the two anchor rods (0), the two electrodes (11), and the power supply (22) form a complete circuit; The electrode (11) comprises a conductive column (111), the conductive column (111) comprises a vertical ring portion (1111) and a top cover portion (1112) connected to the vertical ring portion (1111), the top cover portion (1112) comprises a avoidance hole (1113) coaxially arranged with the vertical ring portion (1111), an insulating sleeve (112) for the anchor rod (0) to pass through is installed on the avoidance hole (1113), the conductive head (02) is located in the conductive column (111), and the conductive head (02) and the conductive column (111) are connected via a vertically deformable elastic conductive member (113); The elastic conductive member (113) maintains connection between the conductive column (111) and the conductive head (02) when the cement-based sensor (1) sinks.

2. The anchor concrete health monitoring system according to claim 1, characterized in that: The elastic conductive member (113) comprises a conductive spring, one end of which abuts against the top cover portion (1112), and the other end of which abuts against the conductive head (02).

3. The anchor concrete health monitoring system according to claim 1, characterized in that: The elastic conductive member (113) comprises a spring sheet, which is located below the conductive head (02), and comprises a connecting portion (1131) connected to the conductive head (02), and a pin portion (1132) connected to the connecting portion (1131) and used to connect to the vertical ring portion (1111).

4. The anchor concrete health monitoring system according to claim 3 is characterized in that: The pin portion (1132) rotates around the central axis of the connecting portion (1131) to form a spiral structure.

5. The anchor concrete health monitoring system according to claim 3, characterized in that: The inner wall of the vertical ring portion (1111) is provided with a connection notch or a connection protrusion connected to the pin portion (1132).

6. The anchor concrete health monitoring system according to claim 1, characterized in that: The conductive head (02) comprises an insulating connection component (021) connected to the anchor rod (0) and a head conductive part (022) embedded in the insulating connection component (021).

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