Anchoring structure damage detection device and method

Abstract

The invention relates to the technical field of support detection, in particular to an anchoring structure damage detection device and method.The device comprises a detection assembly which comprises a center detection body and peripheral side detection bodies arranged on the periphery of the center detection body in parallel, and piezoelectric patches are arranged in the center detection body and the peripheral side detection bodies; the control assembly is connected with the detection assembly, and the control assembly comprises a controller electrically connected with the piezoelectric plate; wherein the central detection body is configured to abut against an anchor rod during detection, the piezoelectric patches in the central detection body emit stress wave signals, the peripheral detection bodies are configured to abut against a tray during detection, the piezoelectric patches in the peripheral detection bodies are used for receiving the stress wave signals and sending the stress wave signals to the controller, and the controller judges whether the anchoring structure is damaged or not according to the received stress wave signals. The central detection body abuts against the anchor rod and sends out the excitation signal, the peripheral detection bodies abutting against the tray receive the stress wave signal to judge whether the anchoring structure is damaged or not, the precision is more accurate, and operation is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of support detection, and in particular to a device and method for detecting damage of an anchoring structure. Background Art

[0002] The anchor structure is a commonly used support structure in mine support structures. The anchor structure is generally achieved by inserting the anchor rod into the surrounding rock, and also includes a tray structure and a nut at the outer end of the anchor rod. During the specific installation, the tray is fastened to the anchor rod by the nut so that the tray is pressed against the surface of the surrounding rock to achieve the preload force of the anchor rod. However, since the anchor rod is deeply embedded in the surrounding rock, its state cannot be judged. Therefore, how to detect damage to the anchor structure has become an important factor affecting the stability and safety of the tunnel.

[0003] In the related technologies, damage detection of anchoring structures mostly adopts the instantaneous percussion method with a hammer or the non-destructive testing method. The instantaneous percussion method with a hammer uses a hammer to knock on the anchor rod and the surrounding supporting structure, and relies on the knocking sound and vibration feedback to judge the state of the anchoring structure. Through auditory and tactile feedback, the inspector can preliminarily judge whether the anchor rod is loose, broken or poorly anchored. Non-destructive testing methods include ultrasonic testing, X-ray testing, geological radar testing, etc.

[0004] However, the above-mentioned hand hammer transient percussion method is greatly affected by the operator's experience and has limited detection accuracy, while the non-destructive testing method has high costs and complex operations, and both are difficult to meet engineering requirements. Summary of the invention

[0005] In view of at least one of the above technical problems, the present invention provides an anchor structure damage detection device and method, which adopts structural improvement to improve the convenience and accuracy of detection.

[0006] According to a first aspect of the present invention, there is provided an anchor structure damage detection device, comprising:

[0007] The detection assembly comprises a central detection body and peripheral detection bodies arranged in parallel around the central detection body, wherein the central detection body and the peripheral detection body both have piezoelectric sheets inside;

[0008] A control component connected to the detection component, wherein the control component includes a controller electrically connected to the piezoelectric sheet;

[0009] Among them, the central detection body is configured to abut against the anchor rod during detection and the piezoelectric sheet inside emits a stress wave signal, and the peripheral detection body is configured to abut against the tray during detection and the piezoelectric sheet inside is used to receive the stress wave signal and send it to the controller, and the controller determines whether the anchoring structure is damaged based on the received stress wave signal.

[0010] In some embodiments of the present invention, the central detection body and the peripheral detection body are internally arranged in a split type, including a first half shell and a second half shell arranged opposite to each other, and the first half shell and the second half shell, when assembled, form a cavity inside for placing the piezoelectric film.

[0011] In some embodiments of the present invention, the central detection body and the peripheral detection body each further include a sleeve sleeved on the ends of the first half shell and the second half shell.

[0012] In some embodiments of the present invention, the detection assembly further includes a cylindrical shell, the ends of the central detection body and the peripheral detection bodies protrude from the cylindrical shell, and the cylindrical shell is further filled with a plurality of telescopic units arranged parallel to the central detection body.

[0013] In some embodiments of the present invention, the telescopic unit includes a clamping column and a first spring with one end fixed to the bottom of the cylindrical shell and the other end fixed to the bottom of the clamping column. The central detection body and the peripheral detection body are both columnar structures and are arranged in parallel with the clamping column.

[0014] In some embodiments of the present invention, the bottom of the cylindrical shell is also provided with holes corresponding to the central detection body and the peripheral detection bodies, and the detection assembly also includes a receiving end connection network, which is connected to the peripheral detection body at the holes to connect multiple peripheral detection bodies in series and receive stress wave signals of the anchoring structure.

[0015] In some embodiments of the present invention, the detection assembly also includes a back plate parallel to the bottom of the cylindrical shell, and the back plate has a groove corresponding to the receiving end connection net on the side facing the cylindrical shell, and the back plate is used to connect and fix the receiving end connection net.

[0016] In some embodiments of the present invention, a telescopic arm assembly is provided between the detection assembly and the control assembly, and the telescopic arm is used to adjust the distance between the detection assembly and the control assembly.

[0017] In some embodiments of the present invention, the telescopic arm assembly comprises:

[0018] An outer tube, one end of which is fixedly connected to the control assembly and the other end of which is a free end;

[0019] An inner tube, one end of which is fixedly connected to the detection assembly, and the other end of which is provided with a nut seat, and the end of the inner tube with the nut seat extends into the outer tube, and the inner tube is relatively slidable only along the axial direction in the outer tube;

[0020] The driving mechanism comprises a motor and a screw connected to the motor, wherein the screw is inserted into the inner tube and is threadedly connected to the nut seat, and the motor is electrically connected to the control assembly.

[0021] According to a second aspect of the present invention, there is also provided a method for detecting damage to an anchor structure, using the device for detecting damage to an anchor structure as described in any one of the first aspects, comprising the following steps:

[0022] Fit the detection assembly to the anchor structure to be detected so that the central detection body abuts against the anchor rod and the peripheral detection bodies abut against the tray;

[0023] Select the diameter and material of the anchor rod in the anchor structure to be tested;

[0024] The piezoelectric sheet in the control center detection body transmits an excitation signal and receives a stress signal detected on the peripheral detection body;

[0025] The received stress signal is compared with the standard stress signal under healthy state to determine whether the anchor structure is damaged.

[0026] The beneficial effects of the present invention are as follows: the present invention uses piezoelectric sheets arranged in the central detection body and the peripheral detection body on the detection component, so that during specific detection, the central detection body abuts against the anchor rod and sends out an excitation signal, and receives the stress wave signal through the peripheral detection body abutting against the tray, and determines whether the anchor structure is damaged based on the received signal; through the above-mentioned arrangement, compared with the handheld method in the prior art, the accuracy is more accurate, and compared with non-destructive testing, the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 Schematic diagram of the structure of the anchor structure damage detection device in an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a detection component in an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the central detection body or the peripheral detection body in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the detection component during detection in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the explosion decomposition structure of the central detection body in an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the explosion decomposition structure of the detection assembly in an embodiment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the anchoring structure damage detection device in an embodiment of the present invention when it is extended;

[0035] Figure 8 It is a schematic cross-sectional view of the anchor structure damage detection device in an embodiment of the present invention;

[0036] Fig. 9 It is a flowchart of the steps of the anchor structure damage detection method in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] like Figures 1 to 8 The anchor structure damage detection device shown in the figure includes a detection component 1 and a control component 2, as shown in FIG. Figure 1 and Figure 3 As shown in , the detection assembly 1 includes a central detection body 11 and peripheral detection bodies 12 arranged in parallel around the central detection body 11, and piezoelectric sheets 13 are provided inside the central detection body 11 and the peripheral detection bodies 12; it should be noted here that, in the embodiment of the present invention, the central detection body 11 is arranged at the center of the detection assembly 1, and the peripheral detection bodies 12 are arranged around the central detection body 11, and the number of the peripheral detection bodies 12 is not limited. In one embodiment of the present invention, there is one central detection body 11, which is arranged at the center of the detection assembly 1, and there are four peripheral detection bodies, which are evenly arranged around the central detection body 11; in the embodiment of the present invention, as Figure 3 The piezoelectric sheet 13 in the central detection body 11 is used to send out an excitation signal, and the piezoelectric sheet 13 in the peripheral detection body 12 is used to receive a stress wave signal. The control component 2 is connected to the detection component 1, and the control component 2 includes a controller electrically connected to the piezoelectric sheet 13; in an embodiment of the present invention, the control component 2 is used to control the piezoelectric sheet 13 to send out an excitation signal and receive the stress wave signal received by the peripheral detection body 12, and to determine whether the anchor structure is damaged by analyzing the received stress wave signal.

[0041] When conducting specific tests, Figure 4 As shown in , the central detection body 11 is configured to abut against the anchor rod 01 during detection, and the piezoelectric sheet 13 inside emits a stress wave signal, and the peripheral detection body 12 is configured to abut against the tray 02 during detection, and the piezoelectric sheet 13 inside is used to receive the stress wave signal and send it to the controller, and the controller determines whether the anchor structure is damaged according to the received stress wave signal. It should be pointed out here that the central detection body 11 in the embodiment of the present invention can be elastically abutted against the anchor rod 01, for example, by setting a spring at the bottom of the central detection body 11 and the peripheral detection body 12, so that both have a telescopic function in the direction of detection, so that when detecting, the central detection body 11 first contacts with the bottom end of the anchor rod 01 and shrinks, and because the tray 02 is screwed on the anchor rod 01, the peripheral detection body 12 is in an extended state relative to the central detection body 11, so that after the central detection body 11 sends an excitation signal, the stress wave signal can be received by the peripheral detection body 12, so as to determine whether the detected anchor structure is damaged. Of course, it should be pointed out here that the control component 2 is a prior art, and its internal controller may contain a signal generator, a signal processing system, etc., as well as storage of standard signal waves and comparison or display functions. Those skilled in the art may set them as needed, which will not be elaborated here.

[0042] In the above embodiment, by means of the piezoelectric sheets 13 arranged in the central detection body 11 and the peripheral detection body 12 on the detection assembly 1, during specific detection, the central detection body 11 abuts against the anchor rod 01 and sends out an excitation signal, and the stress wave signal is received by the peripheral detection body 12 abutting against the tray 02, and the received signal is used to determine whether the anchor structure is damaged. Through the above arrangement, compared with the handheld method in the prior art, the accuracy is more accurate, and compared with the non-destructive testing, the operation is more convenient.

[0043] Based on the above embodiments, there are many specific installation forms for the piezoelectric sheet 13. In some embodiments of the present invention, in order to facilitate the fixation of the piezoelectric sheet 13, such as Figure 5As shown in the figure, the interior of the central detection body 11 and the peripheral detection body 12 are evenly divided into two parts, including a first half shell 11a and a second half shell 11b arranged opposite to each other. After the first half shell 11a and the second half shell 11b are assembled, a chamber 11c for placing the piezoelectric piece 13 is formed inside. With such an arrangement, during the specific installation, the piezoelectric piece 13 is first fixed in the chamber 11c by bonding or other forms such as screwing, and then the two half shells are docked and fixed. The specific docking and fixing can be carried out in the form of gluing, welding or snap connection. In addition, it should be pointed out here that regarding the line lead-out of the piezoelectric piece 13, please continue to refer to Figure 5 , a channel for leading out the line can be opened on the axis of the two half shells.

[0044] In some embodiments of the present invention, in order to facilitate the fixing of the first half shell 11a and the second half shell 11b, please continue to refer to Figure 5 The central detection body 11 and the peripheral detection body 12 also include sleeves 11d sleeved on the ends of the first half shell 11a and the second half shell 11b. In some specific embodiments of the present invention, the ends of the two half shells facing the sleeve 11d are both set as step-shaped structures, so that the two half shells can form a complete structure after being inserted into the sleeve 11d and can improve the fixing reliability of the two half shells by means of clearance fit with the sleeve 11d.

[0045] In some embodiments of the present invention, in order to further improve the reliability and adaptability of contact with the anchoring structure during detection, the detection assembly 1 also includes a cylindrical shell 14, the ends of the central detection body 11 and the peripheral detection body 12 protrude from the cylindrical shell 14, and the cylindrical shell 14 is also filled with a plurality of telescopic units 15 arranged in parallel with the central detection body 11. In an embodiment of the present invention, the inner diameter of the cylindrical shell is greater than the maximum outer diameter of the tray 02 in the anchoring structure. Through this arrangement, when the detection assembly 1 is attached to the anchoring structure, the plurality of telescopic units 15 will be telescoped according to the structure of the tray 02 or the anchor rod 01, thereby clamping the anchor rod 01, improving the detection stability and accuracy, and reducing the influence of the vibration of the device on the detection results; in addition, the present invention can detect anchor rods 01 of various diameters through the arrangement of a plurality of telescopic units 15, so that the time for replacing the detection assembly 1 can be reduced, making the detection faster.

[0046] The specific structure of the telescopic unit 15 is as follows Figure 4As shown in , the telescopic unit 15 includes a clamping column 15a and a first spring 15b fixed at one end to the bottom of the cylindrical housing 14 and at the other end to the bottom of the clamping column 15a. The central detection body 11 and the peripheral detection body 12 are both columnar structures and are arranged in parallel with the clamping column 15a. In the specific arrangement, a slot can be opened at the bottom of the clamping column 15a for the end of the first spring 15b to extend into and be fixed. Specifically, the first spring 15b can be fixed by screwing or welding. In some embodiments of the present invention, such as Figure 2 As shown in the figure, the central detection body 11 and the peripheral detection body 12 are both configured as cylindrical structures, and the adjacent cylinders are arranged tangentially; in one embodiment of the present invention, 110 telescopic units 15, 1 central detection body 11 and 4 peripheral detection bodies 12 (bold parts in the figure) are configured; of course, it should be pointed out here that the above-mentioned quantity limitation is only a specific embodiment of the present invention, and is not a limitation of the present invention. Those skilled in the art can set it as needed based on the concept of the present invention, but it all falls within the protection scope of the present invention.

[0047] In some embodiments of the present invention, in order to further improve the reliability of the received signal, such as Figure 6 As shown in , the bottom of the cylindrical shell 14 is also provided with holes 14a corresponding to the central detection body 11 and the peripheral detection body 12, and the detection assembly 1 also includes a receiving end connection network 16, which is connected to the peripheral detection body 12 at the hole 14a to connect multiple peripheral detection bodies 12 in series and receive the stress wave signal of the anchoring structure. In the embodiment of the present invention, the receiving end connection network 16 is a square frame. When the connection is specifically made, cylindrical connection units can be distributed on the four corners of the square to connect four peripheral detection bodies 12, connect the four peripheral detection bodies 12 in series, receive the stress wave signal containing the damage of the anchoring structure, and finally transmit it to the control assembly 2 through the signal line.

[0048] Please continue to refer to Figure 6 In order to improve the reliability of fixing the receiving end connection net 16, the detection assembly 1 also includes a back plate parallel to the bottom of the cylindrical shell 14, and the back plate has a groove corresponding to the receiving end connection net 16 on the side facing the cylindrical shell 14, and the back plate is used to connect and fix the receiving end connection net 16. In the embodiment of the present invention, the circular hole opened on the back plate is smaller than the diameter of the hole 14a at the bottom of the cylindrical shell 14, and the circular hole is used for the transmission of the signal line. The signal line can be a flexible signal line, so as to improve the service life and reliability of the signal line.

[0049] In some embodiments of the present invention, in order to further improve the convenience of use, please refer to Figure 1 and Figure 7There is also a telescopic arm assembly 3 between the detection assembly 1 and the control assembly 2, and the telescopic arm is used to adjust the distance between the detection assembly 1 and the control assembly 2. Through the setting of the telescopic arm, the detection personnel can use the extension of the telescopic arm to dock with the anchoring structure without the need for climbing, which improves the convenience while also improving the safety of the detection personnel. Of course, it should be pointed out here that the telescopic arm has a variety of structural forms, which can be automatic or manual, such as using a pneumatic cylinder, or a structure similar to a fishing rod, etc.

[0050] In some embodiments of the present invention, a specific structural form of the telescopic arm assembly 3 is as follows: Figures 7 and 8 As shown in , the telescopic arm assembly 3 includes an outer tube 31, an inner tube 32 and a driving mechanism 34; Figure 8 As shown in , one end of the outer tube 31 is fixedly connected to the control assembly 2, and the other end is a free end, that is, the outer tube 31 is suspended at one end facing the detection assembly 1; one end of the inner tube 32 is fixedly connected to the detection assembly 1, and the other end has a nut seat 33, and the end of the inner tube 32 with the nut seat 33 extends into the outer tube 31, and the inner tube 32 can only slide relatively along the axial direction in the outer tube 31; here, there are various structures that can slide relatively along the axial direction only, for example, matching convex grooves can be set on the inner tube 32 and the outer tube 31, or a linear guide structure such as an axial slide rail slider can be set between the two. The driving mechanism 34 includes a motor 34a and a screw rod 34b connected to the motor 34a, the screw rod 34b penetrates into the inner tube 32 and is screwed to the nut seat 33, and the motor 34a is electrically connected to the control assembly 2. During the specific setting, the motor 34a can be fixed in the control component 2 and electrically connected to the control component 2. The screw rod 34b is set on the axis of the outer tube 31 and the inner tube 32. Through such a setting, when the motor 34a drives the screw rod 34b to rotate, since the inner tube 32 cannot rotate relative to the outer tube 31, the nut seat 33 will drive the inner tube 32 to move axially relative to the outer tube 31, thereby driving the detection component 1 to extend and retract. Of course, it should be pointed out here that in order to improve portability, handles and other structures can also be set on the control component 2 and the outer tube 31. The technicians in this field can design it according to actual needs.

[0051] In an embodiment of the present invention, a method for detecting damage to an anchoring structure is also disclosed. The above-mentioned device for detecting damage to an anchoring structure is used. Fig. 9 As shown in , the following steps are included:

[0052] S10: Fit the detection assembly 1 to the anchor structure to be detected, so that the central detection body 11 abuts against the anchor rod 01, and the peripheral detection body 12 abuts against the tray 02; for details, please refer to Figure 4Here, the detection component 1 can be fitted with the anchoring structure to be detected by holding the detection component 1 close to the anchoring structure, or by extending the telescopic arm as mentioned above. Both of the above methods fall within the protection scope of the present invention.

[0053] S20: Select the diameter and material of the anchor rod 01 in the anchor structure to be detected; in the embodiment of the present invention, the controller stores a variety of anchor rod 01 diameter and material options to further improve the accuracy of detection.

[0054] S30: Control the piezoelectric sheet 13 in the central detection body 11 to emit an excitation signal and receive the stress signal detected on the peripheral detection body 12; in the embodiment of the present invention, the excitation signal is a Hanning window modulated sine wave that has undergone time inversion transformation; when the signal is specifically emitted, the excitation signal is transmitted to the signal generator, and the signal generator excites the piezoelectric sheet 13 in the central detection body 11 through the signal line to emit a stress wave to the anchor rod 01, and the stress wave propagates in the anchoring structure, and the stress wave signal is received by the piezoelectric sheets 13 in the four peripheral detection bodies 12. In the embodiment of the present invention, the stress wave signal is a virtual time inversion receiving signal containing the damage information of the anchoring structure of the anchor rod 01.

[0055] S40: Compare the received stress signal with the standard stress signal in the healthy state to determine whether the anchor structure is damaged. When making a specific judgment, the received signal can be transmitted to the display part, and the operator can compare the received signal amplitude on the display screen with the received signal amplitude in the healthy state to determine whether the anchor structure is damaged; or the button on the control component 2 can be used to calculate the energy of the received signal and compare it with the received signal energy in the healthy state to calculate the magnitude of the damage to the anchor structure.

[0056] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An anchor structure damage detection device, characterized in that: include: The detection assembly comprises a central detection body and peripheral detection bodies arranged in parallel around the central detection body, wherein the central detection body and the peripheral detection body both have piezoelectric sheets inside; A control component connected to the detection component, wherein the control component includes a controller electrically connected to the piezoelectric sheet; Among them, the central detection body is configured to abut against the anchor rod during detection and the piezoelectric sheet inside emits a stress wave signal, and the peripheral detection body is configured to abut against the tray during detection and the piezoelectric sheet inside is used to receive the stress wave signal and send it to the controller, and the controller determines whether the anchoring structure is damaged based on the received stress wave signal.

2. The anchor structure damage detection device according to claim 1, characterized in that: The central detection body and the peripheral detection body are evenly divided into two parts, including a first half shell and a second half shell which are arranged opposite to each other. When the first half shell and the second half shell are assembled, a cavity for placing the piezoelectric sheet is formed inside.

3. The anchor structure damage detection device according to claim 2, characterized in that: The central detection body and the peripheral detection body also include sleeves sleeved on the ends of the first half shell and the second half shell.

4. The anchor structure damage detection device according to claim 1, characterized in that: The detection assembly further comprises a cylindrical shell, the ends of the central detection body and the peripheral detection bodies protrude from the cylindrical shell, and the cylindrical shell is further filled with a plurality of telescopic units arranged in parallel with the central detection body.

5. The anchor structure damage detection device according to claim 4, characterized in that: The telescopic unit includes a clamping column and a first spring with one end fixed to the bottom of the cylindrical shell and the other end fixed to the bottom of the clamping column. The central detection body and the peripheral detection body are both columnar structures and are arranged in parallel with the clamping column.

6. The anchor structure damage detection device according to claim 4, characterized in that: The bottom of the cylindrical shell is also provided with holes corresponding to the central detection body and the peripheral detection bodies. The detection assembly also includes a receiving end connection network, which is connected to the peripheral detection body at the holes to connect multiple peripheral detection bodies in series and receive stress wave signals of the anchoring structure.

7. The anchor structure damage detection device according to claim 6, characterized in that: The detection assembly also includes a back plate parallel to the bottom of the cylindrical shell, and a surface of the back plate facing the cylindrical shell also has a groove corresponding to the receiving end connection net, and the back plate is used to connect and fix the receiving end connection net.

8. The anchor structure damage detection device according to claim 1, characterized in that: A telescopic arm assembly is also provided between the detection assembly and the control assembly, and the telescopic arm is used to adjust the distance between the detection assembly and the control assembly.

9. The anchor structure damage detection device according to claim 8, characterized in that: The telescopic arm assembly comprises: An outer tube, one end of which is fixedly connected to the control assembly and the other end of which is a free end; An inner tube, one end of which is fixedly connected to the detection assembly, and the other end of which is provided with a nut seat, and the end of the inner tube with the nut seat extends into the outer tube, and the inner tube is relatively slidable only along the axial direction in the outer tube; The driving mechanism comprises a motor and a screw connected to the motor, wherein the screw is inserted into the inner tube and is threadedly connected to the nut seat, and the motor is electrically connected to the control assembly.

10. A method for detecting damage to an anchoring structure, characterized in that: The anchor structure damage detection device according to any one of claims 1 to 9 comprises the following steps: Fit the detection assembly to the anchor structure to be detected so that the central detection body abuts against the anchor rod and the peripheral detection bodies abut against the tray; Select the diameter and material of the anchor rod in the anchor structure to be tested; The piezoelectric sheet in the control center detection body transmits an excitation signal and receives a stress signal detected on the peripheral detection body; The received stress signal is compared with the standard stress signal under healthy state to determine whether the anchor structure is damaged.

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