An underground displacement monitoring device and system based on deep displacement meter

Abstract

The application discloses a kind of underground displacement monitoring device and system based on deep displacement meter, including the lower casing and upper casing connected by spherical mechanism rotation, the equipment cavity for accommodating deep displacement meter and trigger alarm mechanism is formed in upper casing inside;Lower casing and upper casing are also provided with elastic washer, and the side wall of upper casing, elastic washer and lower casing are all provided with the through hole for installing induction line in circumferential array and one-to-one correspondence, trigger disc is also provided in equipment cavity, and multiple triggers are provided on trigger disc, and any trigger is short-circuited with induction line, and two ends of the induction line are electrically connected with rear-end server by communication cable.The upper and lower casing of spherical connection are used to sense the displacement of geology in the application, so that the induction line arranged in the inner wall of upper and lower casing is pulled off, and the alarm is sent through trigger at the moment of pulling off, so that the condition of geological displacement is grasped in the first time, and the timeliness of geological displacement information is ensured.

Description

Technical Field

[0001] This invention relates to the field of detection equipment technology, and more particularly to the field of detection or monitoring technology of underground geological changes or movements, specifically to an underground displacement monitoring device and system based on a deep displacement gauge. Background Technology

[0002] Underground displacement monitoring is the most direct and effective means of timely understanding the current geological stability of a monitored area and predicting geological movement trends in advance. For example, it is most widely used in monitoring slope geology, areas prone to landslides, or areas with frequent groundwater. By monitoring geological displacement in real time, the stability of the current geological area can be grasped and predicted in a timely manner, which can usually effectively prevent personal and property losses caused by collapses or landslides. Generally, the monitored area is located under tall buildings, on mountain slopes, or on river embankments, etc.

[0003] The applicant obtained existing devices, methods, and technologies for monitoring underground displacement by searching using the keyword "underground displacement monitoring," specifically including:

[0004] Prior Art 1: Chinese Utility Model Patent Publication No. CN205090956U discloses a protection device for a clinometer tube in an underground displacement monitoring system. It includes a clinometer tube installed inside an underground monitoring borehole, a sealing cap at the top of the clinometer tube, and a PVC protective pipe covering the clinometer tube. The upper end of the PVC protective pipe (3) is higher than the end face of the sealing cap. To prevent damage to the clinometer tube from unintentional factors, this utility model uses a PVC protective pipe with a height higher than its upper end face. This PVC protective pipe provides good protection against rolling stones and unintentional collisions. The sealing cap on the clinometer tube prevents debris or falling rocks from entering the PVC protective pipe. The technical problem solved by the above-mentioned prior art is to prevent malicious damage to the deep displacement clinometer tube and blockage by debris in the underground displacement monitoring system. However, it does not improve how to better solve displacement monitoring or alarm issues.

[0005] Prior Art 2: Chinese invention patent application CN111964555A discloses a slope underground displacement monitoring instrument and its displacement monitoring method, relating to the field of slope engineering technology. Its structure is as follows: a steel pipe connects to the upper end of a vertical pipe; two vernier scales are installed inside the steel pipe, and two springs are fixed to both ends of the steel pipe; two axles are fixed to the upper wall of the steel pipe; two base point fixing ends are fixed to the landslide surface and non-landslide positions respectively; the two base point fixing ends are connected to the two springs respectively after passing through the axles with steel strands; a pointer is installed on the steel strand, initially corresponding to the 0 mark of the vernier scale. The beneficial effects of this invention are: when used in open-pit coal mine slope engineering, it can display the underground displacement of the slope, enabling real-time observation of the slope and providing slope sliding displacement data for coal mine engineering technicians and monitoring personnel, thereby effectively preventing slope landslides and collapses during open-pit coal mine mining and construction.

[0006] The technical problem to be solved in this application is basically the same as that in the prior art 2, but it mainly focuses on timely alarming when geological displacement occurs, so as to prompt relevant personnel to make predictions in advance based on the geological displacement situation and trend, and avoid unnecessary losses caused by collapse, landslide and mudslide accidents. Summary of the Invention

[0007] To promptly monitor geological changes, including geological movement, displacement, and landslides, and to issue timely alarms for underground geological displacements, this application provides an underground displacement monitoring device and system based on a deep displacement gauge to address the timeliness of information feedback regarding geological collapses, landslides, and other geological events, thereby preventing unnecessary losses. The underground displacement monitoring device provided by this invention utilizes a purely mechanical structure to achieve alarm functionality, offering high reliability and independence from external environmental influences and the magnitude or rate of geological displacement. It effectively and promptly provides the location, area, and intensity of geological displacements, meeting the monitoring needs for horizontal, tilting, and vertical displacements.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0009] An underground displacement monitoring device based on a deep displacement gauge includes a lower sleeve and an upper sleeve rotatably connected by a ball mechanism. The free end of the upper sleeve is detachably and sealed with a cover. The interior of the upper sleeve forms a device cavity for accommodating the deep displacement gauge and a triggering alarm mechanism. An elastic washer is also provided between the lower sleeve and the upper sleeve. The side walls of the upper sleeve, the elastic washer, and the lower sleeve are all provided with through holes arranged in a circumferential array and corresponding one-to-one for installing induction wires. A trigger disk is also provided inside the device cavity. The trigger disk is provided with multiple triggers, each of which is short-circuited to an induction wire. The two ends of the induction wire are electrically connected to a back-end server through a communication cable.

[0010] Preferably, each of the sensing wires is folded in half to form a bent portion, and the two free ends of the sensing wire pass through the lower sleeve, the elastic washer, and the through hole provided on the upper sleeve in sequence and are electrically connected to the trigger; the bent portion of the sensing wire is fixed by a lower plug provided at the lower port of any of the through holes in the lower sleeve, and an upper plug is provided at the upper port of any of the through holes in the upper sleeve to keep the sensing wire in a taut state.

[0011] Preferably, the ball mechanism includes a stud and a ball that are fixedly connected. The stud is detachably and tightly connected to the upper sleeve via threads, and the ball is rotatably connected to the lower sleeve near the upper end.

[0012] Preferably, the upper sleeve is further threadedly connected to a locking cover plate for abutting against and limiting the relative position between the stud and the upper sleeve.

[0013] Preferably, the trigger plate is equipped with a cable sleeve for accommodating communication cables, the cable sleeve penetrating the cover and extending outward to form an enlarged portion that seals against the cover.

[0014] Preferably, the number of through holes is at least four.

[0015] Preferably, the number of through holes is 8 or 12.

[0016] Preferably, the outer walls of the lower and upper sleeves are provided with a plurality of numbered resistance plates arranged in a circular row, and the number and orientation of the resistance plates correspond to the number of through holes.

[0017] Preferably, the system includes multiple underground displacement monitoring devices as described in claim 8, which are vertically buried underground at different depths and locations. Each of the underground displacement monitoring devices is electrically connected to the back-end server via a communication cable (5) to send displacement trigger signals and displacement signals in real time.

[0018] Beneficial effects:

[0019] 1. This invention uses upper and lower sleeves connected by a spherical shape to sense geological displacement. This causes the sensing wires installed in the inner walls of the upper and lower sleeves to break. At the moment of breakage, an alarm is triggered by a trigger, thereby enabling the geological displacement situation to be grasped in a timely manner and ensuring the timeliness of geological displacement information.

[0020] 2. By using a circular array of multiple induction lines, information such as the direction, degree, and speed of geological displacement can be obtained based on the location and number of induction line breaks and the time between breaks.

[0021] 3. The present invention employs multiple underground displacement detection devices arranged in an array, which can determine the range of displacement occurrence based on the alarm information fed back by multiple underground displacement monitoring devices, and at the same time determine the direction of displacement based on the location number of the alarm issued by the same underground displacement monitoring device, thereby timely determining the overall geological displacement situation of the area. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an isometric view of the underground displacement monitoring device of the present invention.

[0024] Figure 2 yes Figure 1 The main view.

[0025] Figure 3 yes Figure 2 A sectional view with the section symbol AA along the center line.

[0026] Figure 4 yes Figure 3 Enlarged view of the structure in area B.

[0027] Figure 5 yes Figure 1 Axonometric drawing of a structure with a resistance plate.

[0028] Figure 6 yes Figure 1 Axonometric drawing of the internal structure.

[0029] Figure 7 This is a schematic diagram of the induction wire installed inside the through hole.

[0030] Figure 8 This is a schematic diagram of the detection device being bent by an external force.

[0031] Figure 9 yes Figure 8 A schematic diagram of the fracture of the induction wire located in the through hole under stress [where the induction wires numbered (8)-(10) are fractured].

[0032] Figure 10 This is a wiring diagram of a trigger shorting.

[0033] Figure 11 This is a schematic diagram of the installation of an underground displacement detection system.

[0034] In the diagram: 1-Lower sleeve; 2-Elastic washer; 3-Upper sleeve; 4-Cover; 5-Communication cable; 6-Cable sleeve; 7-Trigger disc; 8-Equipment cavity; 9-Locking cover plate; 10-Stud; 11-Spherical body; 12-Resistance plate; 13-Sealing ring; 14-Through hole; 15-Induction wire; 16-Trigger; 17-Upper plug; 18-Lower plug. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] Example 1:

[0042] Refer to the instruction manual. Figures 1-10 The underground displacement monitoring device based on a deep displacement gauge shown includes a lower sleeve 1 and an upper sleeve 3 rotatably connected by a ball mechanism. The free end of the upper sleeve 3 is detachably and sealed with a cover 4. The cover 4 and the upper sleeve 3 are sealed by a sealing ring 13. The interior of the upper sleeve 3 forms an equipment cavity 8 for accommodating the deep displacement gauge and a triggering alarm mechanism. An elastic washer 2 is also provided between the lower sleeve 1 and the upper sleeve 3. The side walls of the upper sleeve 3, the elastic washer 2, and the lower sleeve 1 are all provided with through holes 14 arranged in a circumferential array and corresponding to each other for installing induction wires 15. A trigger disk 7 is also provided in the equipment cavity 8. Multiple triggers 16 are provided on the trigger disk 7. Each trigger 16 is short-circuited to an induction wire 15. The two ends of the induction wire 15 are electrically connected to a back-end server through a communication cable 5.

[0043] Working principle:

[0044] The underground displacement monitoring device provided in this embodiment is installed according to the actual geological conditions to be monitored. This embodiment takes conventional horizontal or inclined displacement and landslide monitoring as examples. The underground displacement monitoring device is vertically installed at a predetermined underground depth and an electrical communication connection is established with the back-end server through communication cable 5. Under normal conditions, the underground displacement monitoring device will not be subjected to radial force, so the overall structure will not undergo any deformation, and any trigger 16 will function as expected. Figure 10 When the circuit is shorted to the sensing line 15, there is no current flowing through the trigger 16, and it cannot send any trigger signal. When the location of the underground displacement monitoring device is subjected to radial force due to geological displacement, the lower sleeve 1 and the upper sleeve 3 will deflect, gradually changing from a coaxial 180° angle to an obtuse angle. The greater the displacement, the smaller the angle will gradually become. At this time, the elastic washer 2 will be compressed on one side and stretched on the opposite side. Figure 8 As shown, the sensing wire 15 on the stretched side will break instantly under the stretching force, combined with... Figure 9 As shown, in Figure 8In this state, the induction wire 15 in the through hole numbered 8-10 breaks, thereby instantly releasing the short circuit state of the corresponding numbered trigger 16, thus energizing and triggering it. The trigger signal is sent to the back-end server through the communication cable 5, and the staff can receive the displacement information immediately.

[0045] The above describes the working principle of a single underground displacement monitoring device triggering an alarm. Figure 9 The breakage of the corresponding numbered induction line 15 can determine the direction and extent of displacement at the current location. The more broken induction lines 15, the more severe the deflection of the lower casing 1 and upper casing 3, and the stronger the displacement. Conversely, if only one induction line 15 is broken, the displacement direction can still be determined, but the displacement intensity will be less. It is worth noting that because a large number of underground displacement monitoring devices are installed in the monitored area at different depths and locations, the coverage area and direction of geological displacement can be effectively obtained, allowing for overall trend prediction and prevention of geological disasters. Furthermore, the deep displacement gauge installed in the equipment cavity 8 can calculate the direction of displacement using an accelerometer, thus achieving dual correction. Deep displacement gauges are a mature existing technology, and in this embodiment, dual monitoring can be achieved, improving monitoring accuracy.

[0046] Example 2:

[0047] This embodiment is based on Embodiment 1, and further incorporates the appendix to the instruction manual. Figures 6-7 As shown, each of the sensing wires 15 is folded in half to form a bent portion. The two free ends of the sensing wire 15 pass through the through holes 14 provided on the lower sleeve 1, the elastic washer 2, and the upper sleeve 3 in sequence and are electrically connected to the trigger 16. The bent portion of the sensing wire 15 is fixed by a lower plug 18 provided at the lower port of any of the through holes 14 in the lower sleeve 1, and an upper plug 17 is provided at the upper port of any of the through holes 14 in the upper sleeve 3 to keep the sensing wire 15 in a taut state. In this embodiment, the sensing wire 15 is made of copper wire with a surface-coated insulating layer. The diameter of the copper wire is no greater than 0.2 mm. After the bent portion passes around the lower plug 18, it passes through the upper plug 17 and is fixed by winding around the upper plug 17 to ensure that the sensing wire 15 is always in a taut state.

[0048] In this embodiment, the ball mechanism includes a stud 10 and a ball 11 fixedly connected. The stud 10 is detachably and sealingly connected to the upper sleeve 3 via threads. The ball 11 is rotatably connected to the lower sleeve 1 near its upper end. See details. Figure 6 As shown.

[0049] In this embodiment, to meet the application requirements of different deflection margins, a locking cover plate 9 is threadedly connected inside the equipment cavity 8 of the upper sleeve 3 to abut against and limit the relative position between the stud 10 and the upper sleeve 3. By adjusting the distance between the stud 10 and the upper sleeve 3, and then using the locking cover plate 9 for fastening, the relative distance between the upper sleeve 3 and the lower sleeve 1 can be fixed, thereby also adjusting the length of the sensing wire 15 and achieving adjustment of the toughness of the sensing wire 15 and the compression resistance of the elastic washer 2.

[0050] In this embodiment, the trigger disk 7 is equipped with a cable sleeve 6 for accommodating the communication cable 5. The cable sleeve 6 penetrates the cover 4 and extends outward to form an enlarged portion that is in sealing contact with the cover 4.

[0051] The number of through holes 14 is at least 4. Specifically, it can be set to 8, 12 or other numbers. The more numerous and denser the distribution, the higher the accuracy of the displacement determination. However, it is preferred to be a multiple of 3 or 4, so that the determination can be more intuitive.

[0052] To further improve the consistency between deflection and positional movement of the underground displacement monitoring device described in this embodiment, multiple numbered resistance plates 12 are arranged in a circular row on the outer walls of the lower sleeve 1 and the upper sleeve 3. The number and orientation of the resistance plates 12 correspond to the number of through holes 14. The arrayed resistance plates 12 can resist stress from any direction, preventing slippage between the underground soil and the lower sleeve 1 and the upper sleeve 3, which would cause the monitored displacement to be lower than the actual displacement, resulting in data distortion.

[0053] Example 3:

[0054] Refer to the instruction manual. Figure 11 As shown, this embodiment provides an underground displacement monitoring system, including multiple underground displacement monitoring devices that are vertically buried underground at different depths and locations as described in any of the above embodiments. Each of the underground displacement monitoring devices is electrically connected to a back-end server via a communication cable 5 to send displacement trigger signals and displacement signals in real time.

[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A subsurface displacement monitoring device based on a deep displacement gauge, characterized in that: The device includes a lower sleeve (1) and an upper sleeve (3) connected by a spherical mechanism. The free end of the upper sleeve (3) is detachably and sealed with a cover (4). The upper sleeve (3) forms an equipment cavity (8) for accommodating a deep displacement gauge and a trigger alarm mechanism. An elastic washer (2) is also provided between the lower sleeve (1) and the upper sleeve (3). The side walls of the upper sleeve (3), the elastic washer (2), and the lower sleeve (1) are all provided with through holes (14) arranged in a circumferential array and corresponding to each other for installing induction wires (15). A trigger disk (7) is also provided in the equipment cavity (8). Multiple triggers (16) are provided on the trigger disk (7). Each trigger (16) is short-circuited to an induction wire (15). The two ends of the induction wire (15) are electrically connected to the back-end server through a communication cable (5). The upper and lower sleeves are used to sense the displacement of the geological surface, so that the induction wire set in the inner wall of the upper and lower sleeves is broken. The short circuit is released at the moment of breakage, and an alarm is triggered.

2. The underground displacement monitoring device based on a deep displacement gauge according to claim 1, characterized in that: Each of the aforementioned sensing wires (15) is folded in half to form a bent portion. The two free ends of the sensing wire (15) pass through the through holes (14) provided on the lower sleeve (1), the elastic washer (2), and the upper sleeve (3) in sequence and are electrically connected to the trigger (16). The bent portion of the sensing wire (15) is fixed by a lower plug (18) provided at the lower port of any of the aforementioned through holes (14) in the lower sleeve (1). An upper plug (17) is provided at the upper port of any of the aforementioned through holes (14) in the upper sleeve (3) to keep the sensing wire (15) in a taut state.

3. The underground displacement monitoring device based on a deep displacement gauge according to claim 2, characterized in that: The ball mechanism includes a stud (10) and a ball (11) that are fixedly connected. The stud (10) is detachably and sealed to the upper sleeve (3) by means of threads. The ball (11) is rotatably connected to the lower sleeve (1) near the upper end.

4. The underground displacement monitoring device based on a deep displacement gauge according to claim 3, characterized in that: The upper sleeve (3) is also threadedly connected to the equipment cavity (8) of the upper sleeve (3), which is used to abut against and limit the relative position between the stud (10) and the upper sleeve (3).

5. The underground displacement monitoring device based on a deep displacement gauge according to claim 4, characterized in that: The trigger plate (7) is equipped with a cable sleeve (6) for accommodating the communication cable (5). The cable sleeve (6) penetrates the cover (4) and extends outward to form an enlarged portion that is in sealing contact with the cover (4).

6. The underground displacement monitoring device based on a deep displacement gauge according to claim 5, characterized in that: The number of through holes (14) is at least 4.

7. The underground displacement monitoring device based on a deep displacement gauge according to claim 6, characterized in that: The number of through holes (14) is 8 or 12.

8. The underground displacement monitoring device based on a deep displacement gauge according to claim 5, characterized in that: Multiple numbered resistance plates (12) are arranged in a circular array on the outer walls of the lower sleeve (1) and the upper sleeve (3), and the number and orientation of the resistance plates (12) correspond to the number of through holes (14).

9. An underground displacement monitoring system for monitoring the displacement status of underground structures or geological formations, characterized in that: It includes multiple underground displacement monitoring devices as described in claim 8, which are vertically buried underground at different depths and locations. Each of the underground displacement monitoring devices is electrically connected to the back-end server via a communication cable (5) to send displacement trigger signals and displacement signals in real time.

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