A landslide deformation monitoring device

Abstract

The present invention belongs to the technical field of natural disaster monitoring and early warning, and specifically discloses a landslide deformation monitoring device, including monitoring piers, which are arranged on both sides of a crack, a monitoring box is fixedly provided on the upper side of one of the monitoring piers, a rope end fastening mechanism is provided on the upper side of the other monitoring pier, a winding disk, a displacement monitoring mechanism and a centrifugal drive anti-interference mechanism are provided inside the monitoring box, the winding disk is engaged and rotated on the side wall of the monitoring box, the displacement monitoring mechanism is located on the rope outlet side of the winding disk, the centrifugal drive anti-interference mechanism is coaxially arranged with the winding disk, the winding disk is connected to a tension pre-tightening mechanism on the outer side of the monitoring box, and a solar power supply component is provided on the upper side of the monitoring box. The present invention uses a pure mechanical structure to determine the real reason for the change in the monitoring value, effectively eliminating the influence of external interference on the crack width monitoring result, thereby avoiding false alarms and reducing the need for frequent on-site inspections. The installation is simple and quick, no complicated operations are required, and it can be quickly deployed in various terrain environments.

Description

Technical Field

[0001] The invention belongs to the technical field of natural disaster monitoring and early warning, and specifically refers to a landslide deformation monitoring device. Background Art

[0002] Landslides are a common type of geological disaster, which are extremely destructive and often cause serious casualties and economic losses. Therefore, effective monitoring and early warning of landslides are crucial to reducing disaster losses. The occurrence of landslides is a complex process, and usually some precursor deformations will be shown before catastrophic sliding, such as the appearance and expansion of surface cracks. These cracks usually appear at the rear edge or side edge of the landslide, which is a sign of separation of the sliding body from the stable rock and soil body, and is also an important indicator of landslide deformation. Therefore, real-time monitoring of landslide cracks can provide key data support for landslide early warning.

[0003] At present, the landslide crack monitoring methods mainly include the following: manual measurement, which relies on manual measurement using tools regularly. Although it is low-cost, it is inefficient and cannot achieve real-time monitoring; crack meter monitoring, a crack meter is an instrument specifically used to measure crack width changes. Crack meters can be divided into various types such as resistance type, capacitance type, LVDT type, etc. Crack meters can achieve high-precision and high-frequency crack width measurement; rope-type crack monitoring, this method uses a rope across the crack to monitor the change in crack width by measuring the change in rope length. Rope-type crack monitoring has the advantages of simple structure, low cost, easy installation and operation, and is particularly suitable for measuring large crack width changes. For example, in some cases, in order to avoid interfering with the natural development of the crack, or due to the limitation of the installation location, the monitoring point needs to be set at a position far away from the edge of the crack. At this time, the ordinary short-baseline crack meter cannot be used directly, while the rope-type crack monitoring can well meet this demand. By setting sensors on the rope, remote and real-time crack width monitoring can also be achieved. However, the existing rope-type crack monitoring technology also has some shortcomings.

[0004] In simple construction, the pull rope is usually exposed on the surface and is easily disturbed by external factors such as snow, debris, rolling gravel, and fallen branches. These interferences will cause the length of the pull rope to change, resulting in misjudgment during remote monitoring, showing that the width of the crack has suddenly increased. This situation is very frequent in actual applications. Once it occurs, technicians need to go to the site immediately for investigation, wasting a lot of manpower and time. Although visual sensors or cameras can be considered for auxiliary monitoring, this will increase maintenance costs and are easily blocked in outdoor environments, making it impossible to provide long-term stable auxiliary monitoring.

[0005] To solve the above problems, the existing technology requires complex immersed tube operations and laying pull ropes through cracks in the underground immersed tubes. This method has a long preparation period and is prone to disturbing the fractured strata. In addition, this installation method cannot be applied to emergency scenarios that require rapid deployment of monitoring equipment. Summary of the invention

[0006] In view of the above situation, the present invention provides a landslide deformation monitoring device, which uses a purely mechanical structure to determine the real reason for the change in the monitoring value, effectively eliminating the influence of external interference on the crack width monitoring results, thereby avoiding false alarms and reducing the need for frequent on-site inspections. It is easy and quick to install, does not require complicated operations, and can be quickly deployed in various terrain environments.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a landslide deformation monitoring device, including monitoring piers, which are arranged on both sides of the crack, wherein a monitoring box is fixedly provided on the upper side of one of the monitoring piers, and a rope end fastening mechanism is provided on the upper side of the other monitoring pier for fixing the free end of the pull rope, a winding disk, a displacement monitoring mechanism and a centrifugal drive anti-interference mechanism are provided inside the monitoring box, the winding disk is engaged and rotatably arranged on the side wall of the monitoring box for winding and releasing the pull rope, the displacement monitoring mechanism is located on the rope outlet side of the winding disk for guiding the rope outlet and monitoring displacement changes, the centrifugal drive anti-interference mechanism is coaxially arranged with the winding disk for judging the real cause of the displacement value change and eliminating interference factors, the winding disk is connected with a tension pre-tightening mechanism on the outside of the monitoring box for keeping the pull rope in a tightened state at all times, and a solar power supply component is provided on the upper side of the monitoring box for providing power support for the displacement monitoring mechanism and the centrifugal drive anti-interference mechanism.

[0008] Furthermore, the centrifugal drive anti-interference mechanism includes a mounting ring and a motor, the mounting ring is coaxially fixed on a side of the winding disk away from the tension pretensioning mechanism, one end of the mounting ring is coaxially fixed with an inner ratchet, the motor is fixedly arranged on the outer side of the side wall of the monitoring box away from the tension pretensioning mechanism, the output end of the motor passes through the side wall of the monitoring box and is coaxially fixed with a turntable, the turntable extends into the inner ratchet, the turntable and the inner ratchet are coaxially arranged, the arc surface of the turntable is provided with a groove in an array along the circumference of the axis of the turntable, the turntable is fixedly provided with a limit column at the bottom of the groove, the limit column points to the axis of the turntable, a slider is slidably provided in the groove, a limit groove is provided at the bottom of the slider, the limit column tightly extends into the limit groove, a tension spring is sleeved on the outer side of the limit column, both ends of the tension spring are respectively fixedly connected to the bottom of the groove and the slider, and a wedge is fixedly provided at one end of the slider extending out of the groove.

[0009] Furthermore, the displacement monitoring mechanism includes a measuring wheel shaft and a rotary encoder, and both ends of the measuring wheel shaft are vertically engaged and rotatably arranged on the side wall of the monitoring box. The measuring wheel shaft is provided with two upper and lower measuring wheel shafts, and guide measuring wheels are coaxially fixed at the same position on the two measuring wheel shafts. The rotary encoder is fixed on the outside of the side wall of the monitoring box, and one of the measuring wheel shafts passes through the side wall of the monitoring box and is coaxially fixedly connected with the center axis of the rotary encoder.

[0010] Furthermore, the tension pretensioning mechanism includes a first reel, a second reel, a constant force spring and a protective shell, the first reel is coaxially fixed on the connecting shaft between the winding disk and the side wall of the monitoring box, the second reel is engaged and rotatably arranged on the side wall of the monitoring box, the first reel and the second reel are located on the outside of the side wall of the monitoring box, one end of the constant force spring is fixed on the first reel, and the other end of the constant force spring is fixed on the second reel, the upper part of the constant force spring is reversely wound on the first reel, and the lower part of the constant force spring is forwardly wound on the second reel, and the protective shell is fixed on the outside of the side wall of the monitoring box and wraps the constant force spring.

[0011] Furthermore, a pull rope is wound in the wire groove of the winding reel, one end of the pull rope is fixedly connected to the bottom of the wire groove of the winding reel, the width of the wire groove of the winding reel is equal to the diameter of the pull rope, and a rope outlet hole is opened on the side wall of the monitoring box near the guide measuring wheel, and the other end of the pull rope passes through the arc surface of the two guide measuring wheels and then comes out from the rope outlet hole.

[0012] Furthermore, the rope end fastening mechanism includes a fixed seat, a pull ring and a screw rod. The fixed seat is fixedly arranged on a monitoring pier opposite to the monitoring box. A support rod is symmetrically fixedly arranged on the upper side of the fixed seat. The pull ring is fixedly arranged at one end of the pull rope. The thickness of the pull ring is equal to the distance between the two support rods. The screw rod vertically penetrates the upper ends of the two support rods. A nut is threadedly connected to the end of the screw rod. The inner diameter of the pull ring is equal to the diameter of the screw rod.

[0013] Furthermore, the solar power supply assembly includes a lifting column, which is fixed on the upper side of the monitoring box, a battery is fixed on one side of the lifting column, and a photovoltaic panel is fixed on the upper end of the lifting column.

[0014] Furthermore, when the turntable is stationary, the wedge block is separated from the ratchet teeth of the inner ratchet wheel. When the turntable rotates in a single clockwise direction, the wedge block contacts the ratchet teeth of the inner ratchet wheel under the action of centrifugal force and drives the inner ratchet wheel to rotate. When the inner ratchet wheel is driven to rotate by the wedge block, the winding disk tightens the pull rope.

[0015] Furthermore, the constant force spring drives the reel to tighten the pull rope when passively restoring the initial state.

[0016] Furthermore, the rotary encoder and the motor are both electrically connected to the battery.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows:

[0018] (1) The core of the present invention lies in the centrifugal-driven anti-interference mechanism. By utilizing the principle of centrifugal force and combining the mechanical coordination of the inner ratchet and the wedge, the present invention realizes the distinction between external interference and real crack expansion. When the length of the pull rope changes, the monitor can start the centrifugal-driven anti-interference mechanism by remotely controlling the motor. If the change in the length of the pull rope is caused by external interference such as falling branches or rocks, the mechanism will automatically tighten the pull rope and try to eliminate the interference. If the pull rope successfully gets rid of the interference, the monitoring value will return to the value before the interference and remain stable. The false alarm can be confirmed without on-site investigation. If the interference object cannot be eliminated immediately, the pull rope will produce periodic disturbances under the action of the mechanism, and finally the interference object will be detached. The whole process does not require human intervention, and external interference can be effectively eliminated to avoid false alarms, thereby significantly reducing the need for on-site investigation and saving manpower and time costs. Even in extreme cases, the pull rope cannot get rid of the interference object, and the monitor can judge that it is not crack expansion through the continuous fluctuation of the value, thereby avoiding unnecessary emergency dispatch.

[0019] (2) The centrifugal drive anti-interference mechanism adopts a purely mechanical structure, which avoids the reliability problem of electronic components in harsh environments and ensures the long-term stable operation of the device. Compared with the existing technology that requires complex immersed tube operations, the device of the present invention has a simple structure and is easy and quick to install. It does not require any stratum disturbance and can be quickly deployed in various terrain environments. It is particularly suitable for emergency scenarios that require rapid deployment of monitoring equipment. This design also greatly reduces the maintenance cost of the device, making it an economical and efficient landslide deformation monitoring solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a first three-dimensional structural schematic diagram of a landslide deformation monitoring device proposed by the present invention.

[0021] Figure 2 This is a second three-dimensional structural schematic diagram of a landslide deformation monitoring device proposed by the present invention.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the positional relationship between a motor and a monitoring box of a landslide deformation monitoring device proposed by the present invention.

[0023] Figure 4 The present invention provides a schematic structural diagram of the relationship between the displacement monitoring mechanism and the pull rope position of a landslide deformation monitoring device.

[0024] Figure 5 This is a schematic diagram of the exploded structure of the positional relationship between the constant force spring and the second reel of a landslide deformation monitoring device proposed by the present invention.

[0025] Figure 6 This is a schematic diagram of the explosion structure of a centrifugally driven anti-interference mechanism of a landslide deformation monitoring device proposed by the present invention.

[0026] Figure 7 The figure is a side view of a winding reel of a landslide deformation monitoring device proposed by the present invention.

[0027] Figure 8 for Figure 7 Middle AA section view.

[0028] Fig. 9 This is a structural schematic diagram of the positional relationship between a pull rope and a constant force spring of a landslide deformation monitoring device proposed by the present invention.

[0029] Fig.10 for Figure 1 Enlarged view of part B.

[0030] Among them, 1. monitoring pier, 2. monitoring box, 21. rope outlet hole, 3. reel, 31. pull rope, 4. displacement monitoring mechanism, 41. measuring wheel shaft, 42. guide measuring wheel, 43. rotary encoder, 5. tension pre-tightening mechanism, 51. second reel, 52. first reel, 53. constant force spring, 54. protective shell, 6. centrifugal drive anti-interference mechanism, 61. mounting ring, 62. inner ratchet, 63. turntable, 64. groove, 65. limit column, 66. slider, 661. limit groove, 67. wedge, 68. tension spring, 69. motor, 7. solar power supply component, 71. lifting column, 72. photovoltaic panel, 73. battery, 8. rope end fastening mechanism, 81. fixing seat, 82. support rod, 83. screw, 84. nut, 85. pull ring.

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the present invention proposes a landslide deformation monitoring device, including monitoring piers 1, which are arranged on both sides of the crack, wherein a monitoring box 2 is fixedly provided on the upper side of one of the monitoring piers 1, and a rope end fastening mechanism 8 is provided on the upper side of the other monitoring pier 1, a winding drum 3, a displacement monitoring mechanism 4 and a centrifugal drive anti-interference mechanism 6 are provided inside the monitoring box 2, the winding drum 3 is engaged and rotatably arranged on the side wall of the monitoring box 2, the displacement monitoring mechanism 4 is located on the rope outlet side of the winding drum 3, the centrifugal drive anti-interference mechanism 6 is coaxially arranged with the winding drum 3, the winding drum 3 is connected with a tension pre-tightening mechanism 5 on the outer side of the monitoring box 2, and a solar power supply component 7 is provided on the upper side of the monitoring box 2.

[0035] The centrifugal drive anti-interference mechanism 6 includes a mounting ring 61 and a motor 69. The mounting ring 61 is coaxially fixed on the side of the winding disk 3 away from the tension pre-tensioning mechanism 5. An inner ratchet 62 is coaxially fixed at one end of the mounting ring 61. The motor 69 is fixed on the outer side of the side wall of the monitoring box 2 away from the tension pre-tensioning mechanism 5. The output end of the motor 69 passes through the side wall of the monitoring box 2 and is coaxially fixed with a turntable 63. The turntable 63 extends into the inner ratchet 62. The turntable 63 is coaxially arranged with the inner ratchet 62. The arc surface of the turntable 63 is along the A groove 64 is provided in a circular array around the axis of the turntable 63, and a limiting column 65 is fixedly provided at the bottom of the groove 64 of the turntable 63. The limiting column 65 points to the axis of the turntable 63, and a slider 66 is slidably provided in the groove 64. A limiting groove 661 is provided at the bottom of the slider 66, and the limiting column 65 tightly extends into the limiting groove 661. A tension spring 68 is sleeved on the outer side of the limiting column 65, and both ends of the tension spring 68 are respectively fixedly connected to the bottom of the groove 64 and the slider 66, and a wedge block 67 is fixedly provided at one end of the slider 66 extending out of the groove 64.

[0036] Among them, the displacement monitoring mechanism 4 includes a measuring wheel shaft 41 and a rotary encoder 43. The two ends of the measuring wheel shaft 41 are vertically engaged and rotatably arranged on the side wall of the monitoring box 2. The measuring wheel shaft 41 is arranged in two parts, upper and lower. A guide measuring wheel 42 is coaxially fixed at the same position on the two measuring wheel shafts 41. The rotary encoder 43 is fixed on the outside of the side wall of the monitoring box 2. One of the measuring wheel shafts 41 passes through the side wall of the monitoring box 2 and is coaxially fixedly connected to the center axis of the rotary encoder 43.

[0037] It is well known to those skilled in the art that the rotary encoder 43 is used to measure the total angle of rotation. The rotary encoder 43 may be a photoelectric encoder, a magnetic encoder or other types of angle sensors. The center axis of the rotary encoder 43 and the measuring wheel shaft 41 are usually connected by interference fit, key connection or pin connection. This connection method can ensure that the center axis of the rotary encoder 43 and the measuring wheel shaft 41 rotate synchronously.

[0038] Among them, the tension pretensioning mechanism 5 includes a first reel 52, a second reel 51, a constant force spring 53 and a protective shell 54. The first reel 52 is coaxially fixed on the connecting shaft between the winding disk 3 and the side wall of the monitoring box 2, and the second reel 51 is engaged and rotatably arranged on the side wall of the monitoring box 2. The first reel 52 and the second reel 51 are located on the outside of the side wall of the monitoring box 2. One end of the constant force spring 53 is fixed on the first reel 52, and the other end of the constant force spring 53 is fixed on the second reel 51. The upper part of the constant force spring 53 is reversely wound on the first reel 52, and the lower part of the constant force spring 53 is forwardly wound on the second reel 51. The protective shell 54 is fixed on the outside of the side wall of the monitoring box 2 and wraps the constant force spring 53. When the constant force spring 53 passively restores the initial state, it drives the winding disk 3 to tighten the pull rope 31.

[0039] It is well known to people in the field that the constant force spring 53 is a winding structure and is pre-tightened when leaving the factory. When it is pulled apart, it will generate a force to maintain its initial state, and the same force will be generated when it is rewound. Therefore, rewinding on the first reel 52 will force the first reel 52 to rotate to restore the initial state. The forward winding will also automatically rewind after the second reel 51 to drive the second reel 51 to rotate. Therefore, the superposition of forward winding and reverse winding will generate continuous torque, which is used to keep the pull rope 31 taut.

[0040] Among them, a pull rope 31 is wound in the wire groove of the winding drum 3, one end of the pull rope 31 is fixedly connected to the bottom of the wire groove of the winding drum 3, the width of the wire groove of the winding drum 3 is equal to the diameter of the pull rope 31, and a rope outlet hole 21 is opened on the side wall of the monitoring box 2 near the guide measuring wheel 42, and the other end of the pull rope 31 passes through the arc surface of the two guide measuring wheels 42 and then passes through the rope outlet hole 21.

[0041] It is well known to people in the field that the contact surface between the guide measuring wheel 42 and the pull rope 31 is made of a material with a high friction coefficient, and when the pressure is sufficient, the pull rope 31 and the guide measuring wheel 42 will not slide relative to each other. The rotation angle of the guide measuring wheel 42 is monitored by the rotary encoder 43, and the circumferential distance of the contact position of the guide measuring wheel 42 can be calculated through the radius corresponding to the contact position between the guide measuring wheel 42 and the pull rope 31. This distance is the distance moved by the pull rope 31.

[0042] Among them, the rope end fastening mechanism 8 includes a fixed seat 81, a pull ring 85 and a screw 83. The fixed seat 81 is fixed on the monitoring pier 1 opposite to the monitoring box 2. The support rod 82 is symmetrically fixed on the upper side of the fixed seat 81. The pull ring 85 is fixed at one end of the pull rope 31. The thickness of the pull ring 85 is equal to the distance between the two support rods 82. The screw 83 vertically penetrates the upper ends of the two support rods 82. The end of the screw 83 is threadedly connected with a nut 84. The inner diameter of the pull ring 85 is equal to the diameter of the screw 83.

[0043] Through the above arrangement, the pull ring 85 is vertically inserted between the two support rods 82 so as to be clamped in the horizontal direction, and is fixed in the longitudinal direction after being passed through by the screw rod 83 , and the nut 84 is fixed on the screw rod 83 to fix the end of the pull rope 31 .

[0044] The solar power source assembly 7 includes a lifting column 71 , which is fixed on the upper side of the monitoring box 2 , a battery 73 is fixed on one side of the lifting column 71 , and a photovoltaic panel 72 is fixed on the upper end of the lifting column 71 .

[0045] When the turntable 63 is stationary, the wedge block 67 is separated from the ratchet teeth of the inner ratchet 62. When the turntable 63 rotates in a single clockwise direction, the wedge block 67 contacts the ratchet teeth of the inner ratchet 62 under the action of centrifugal force and drives the inner ratchet 62 to rotate. When the inner ratchet 62 is driven to rotate by the wedge block 67, the winding disk 3 tightens the pull rope 31.

[0046] The rotary encoder 43 and the motor 69 are both electrically connected to the battery 73 .

[0047] During specific use, the monitoring pier 1 is prefabricated or directly cast on site and then buried on both sides of the landslide crack to be monitored, wherein a rope end fastening mechanism 8 is installed on the monitoring pier 1 located on the landslide, and a monitoring box 2 is installed on the other monitoring pier 1. This selection method ensures the stability and safety of the structure on the monitoring box 2. After the pull rope 31 is stretched, the pull ring 85 is inserted between the upper ends of the two support rods 82, and the screw rod 83 is passed through the support rod 82 and the pull ring 85 and then fixed by tightening the nut 84. The installation work is completed, and the solar power supply component 7 will continue to provide power support.

[0048] The constant force spring 53 drives the first reel 52 and then drives the winding drum 3 to have a rotation tendency so that the pull rope 31 is always kept in a tensioned state. This tension can only keep the pull rope 31 tensioned to overcome its own gravity but cannot block the downward pressure of foreign objects. When the crack expands or the pull rope 31 encounters rolling gravel and falling branches, the pull rope 31 will be pulled out of the winding drum 3 for a distance. At this time, the pull rope 31 will drive the guide measuring wheel 42 and the measuring wheel shaft 41 to rotate, so that the rotary encoder 43 detects the change and starts to record the total rotation angle. Since the arc surface of the guide measuring wheel 42 is in close contact with the pull rope 31, the circumferential length of the arc surface rotation of the guide measuring wheel 42 is equal to the length of the movement of the pull rope 31, so as to deduce the distance that the pull rope 31 is pulled out, and the numerical change is uploaded to the background and read by the monitor. At this time, the monitor remotely controls the motor 69 to start and starts to determine the real reason for the sudden increase in the displacement value.

[0049] If the crack is actually expanding, the following results will occur: the motor 69 drives the turntable 63 to rotate, and under the action of centrifugal force, the slider 66 and the wedge block 67 overcome the tension of the tension spring 68 and are thrown outward, and the wedge block 67 will resist the ratchet teeth of the inner ratchet 62. Since the crack is actually expanding, the pull rope 31 is in an absolutely taut state at this time, so the wedge block 67 cannot resist the rotation of the inner ratchet 62 to further tighten the pull rope 31, so that the centrifugal force disappears after the wedge block 67 stalls and it is pulled back by the tension spring 68, thereby separating from the inner ratchet 62, and then being thrown out under the drive of the motor 69, it resists the inner ratchet 62 after stalling and then retracts, which is reflected in the background monitoring value that the displacement value remains unchanged. In this case, the motor 69 can be turned off, and it can be determined that the crack is actually expanding, so that the crack expansion situation can be checked on site in time and subsequent emergency measures can be taken.

[0050] If the pull rope 31 is disturbed by foreign matter, the following results will occur: (1) The motor 69 drives the turntable 63 to rotate, and the wedge block 67 is thrown out to resist the rotation of the inner ratchet 62, so that the pull rope 31 overcomes the pressure of the foreign matter and gradually tightens. After the pull rope 31 is completely tightened, the wedge block 67 can no longer drive the inner ratchet 62 to rotate. The wedge block 67 loses speed and separates from the inner ratchet 62. If the foreign matter is thrown away during the tensioning of the pull rope 31, the pull rope 31 will no longer be pressed and pulled out by the foreign matter at the moment the wedge block 67 separates from the inner ratchet 62. Then the motor 69 continues to rotate accompanied by the repeated throwing and retraction of the wedge block 67, but the pull rope 31 remains taut. This process is reflected in the monitoring value of the background, that is, the monitoring value suddenly decreases and returns to the value between the abnormality and remains unchanged. At this time, the motor 69 can be turned off, and it can be determined that the foreign matter has been removed, and subsequent normal monitoring can be carried out; (2) If the foreign object is not removed, the pull rope 31 is pressed by the foreign object again and pulled a very small distance when the wedge block 67 separates from the inner ratchet 62 for the first time. The motor 69 drives the wedge block 67 to contact the inner ratchet 62 again to tighten the pull rope 31. This process will be repeated, so that the pull rope 31 is pulled frequently, which will cause the pull rope 31 to be violently disturbed and completely shake off the foreign object. This process is reflected in the monitoring value of the background, that is, the monitoring value suddenly decreases and returns to the value between the abnormal occurrence, and then repeatedly increases and decreases by a smaller value until it returns to the value between the abnormal occurrence and no longer changes. (3) If the repeated small value changes continue, it means that the pull rope 31 cannot break free from the foreign object. At this time, it is necessary to go to the site to remove the foreign object. However, since it is not a change in cracks, there is no need to go there immediately, which reduces the pressure on the monitor.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0053] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A landslide deformation monitoring device, comprising a monitoring pier (1), wherein the monitoring pier (1) is arranged on both sides of a crack, and is characterized in that: A monitoring box (2) is fixedly provided on the upper side of one of the monitoring piers (1), and a rope end fastening mechanism (8) is provided on the upper side of the other monitoring pier (1). A reel (3), a displacement monitoring mechanism (4) and a centrifugal drive anti-interference mechanism (6) are provided inside the monitoring box (2). The reel (3) is rotatably mounted on the side wall of the monitoring box (2). The displacement monitoring mechanism (4) is located on the rope outlet side of the reel (3). The centrifugal drive anti-interference mechanism (6) is coaxially arranged with the reel (3). The reel (3) is connected to a tension pre-tightening mechanism (5) on the outer side of the monitoring box (2). A solar power supply assembly (7) is provided on the upper side of the monitoring box (2); The centrifugal drive anti-interference mechanism (6) comprises a mounting ring (61) and a motor (69); the mounting ring (61) is coaxially fixedly arranged on a side of the winding disk (3) away from the tension pre-tensioning mechanism (5); an inner ratchet (62) is coaxially fixedly arranged at one end of the mounting ring (61); the motor (69) is fixedly arranged on the outer side of a side wall of the monitoring box (2) away from the tension pre-tensioning mechanism (5); an output end of the motor (69) penetrates through the side wall of the monitoring box (2) and is coaxially fixedly provided with a rotating disk (63); the rotating disk (63) extends into the inner ratchet (62); the rotating disk (63) and the inner ratchet (62) are coaxially arranged; the arc surface of the rotating disk (63) is along the rotating disk (6 3) A groove (64) is provided in an array on the circumference of the axis. A limiting column (65) is fixedly provided at the bottom of the groove (64) of the turntable (63). The limiting column (65) points to the axis of the turntable (63). A sliding block (66) is slidably provided in the groove (64). A limiting groove (661) is provided at the bottom of the sliding block (66). The limiting column (65) tightly extends into the limiting groove (661). A tension spring (68) is sleeved on the outer side of the limiting column (65). The two ends of the tension spring (68) are respectively fixedly connected to the bottom of the groove (64) and the sliding block (66). A wedge block (67) is fixedly provided at one end of the sliding block (66) extending out of the groove (64).

2. A landslide deformation monitoring device according to claim 1, characterized in that: The displacement monitoring mechanism (4) comprises a measuring wheel shaft (41) and a rotary encoder (43); the measuring wheel shaft (41) is vertically engaged and rotatably arranged at both ends on the side wall of the monitoring box (2); the measuring wheel shaft (41) is provided with two upper and lower measuring wheel shafts; guide measuring wheels (42) are coaxially fixedly arranged on the two measuring wheel shafts (41) at the same position; the rotary encoder (43) is fixedly arranged on the outside of the side wall of the monitoring box (2); one of the measuring wheel shafts (41) penetrates the side wall of the monitoring box (2) and is coaxially fixedly connected to the central axis of the rotary encoder (43).

3. A landslide deformation monitoring device according to claim 2, characterized in that: The tension pre-tightening mechanism (5) comprises a first reel (52), a second reel (51), a constant force spring (53) and a protective shell (54); the first reel (52) is coaxially fixed on a connecting shaft between the reel (3) and the side wall of the monitoring box (2); the second reel (51) is rotatably mounted on the side wall of the monitoring box (2); the first reel (52) and the second reel (51) are located outside the side wall of the monitoring box (2); one end of the constant force spring (53) is fixed on the first reel (52); the other end of the constant force spring (53) is fixed on the second reel (51); the upper part of the constant force spring (53) is reversely wound on the first reel (52); the lower part of the constant force spring (53) is forwardly wound on the second reel (51); and the protective shell (54) is fixed on the outside of the side wall of the monitoring box (2) and wraps the constant force spring (53).

4. A landslide deformation monitoring device according to claim 3, characterized in that: A pull rope (31) is wound in the wire groove of the winding reel (3), one end of the pull rope (31) is fixedly connected to the bottom of the wire groove of the winding reel (3), the width of the wire groove of the winding reel (3) is equal to the diameter of the pull rope (31), and a rope outlet hole (21) is opened on the side wall of the monitoring box (2) near the guide measuring wheel (42), and the other end of the pull rope (31) passes closely through the arc surfaces of the two guide measuring wheels (42) and then passes out from the rope outlet hole (21).

5. A landslide deformation monitoring device according to claim 4, characterized in that: The rope end fastening mechanism (8) comprises a fixing seat (81), a pull ring (85) and a screw rod (83); the fixing seat (81) is fixedly arranged on a monitoring pier (1) opposite to the monitoring box (2); a support rod (82) is symmetrically fixedly arranged on the upper side of the fixing seat (81); the pull ring (85) is fixedly arranged on one end of the pull rope (31); the thickness of the pull ring (85) is equal to the spacing between the two support rods (82); the screw rod (83) vertically penetrates the upper ends of the two support rods (82); a nut (84) is threadedly connected to the end of the screw rod (83); and the inner diameter of the pull ring (85) is equal to the diameter of the screw rod (83).

6. A landslide deformation monitoring device according to claim 5, characterized in that: The solar power source assembly (7) comprises a lifting column (71), the lifting column (71) being fixedly arranged on the upper side of the monitoring box (2), a storage battery (73) being fixedly arranged on one side of the lifting column (71), and a photovoltaic panel (72) being fixedly arranged on the upper end of the lifting column (71).

7. A landslide deformation monitoring device according to claim 6, characterized in that: When the rotating disk (63) is stationary, the wedge block (67) is separated from the ratchet teeth of the inner ratchet wheel (62); when the rotating disk (63) rotates in a single clockwise direction, the wedge block (67) contacts the ratchet teeth of the inner ratchet wheel (62) under the action of centrifugal force and drives the inner ratchet wheel (62) to rotate; when the inner ratchet wheel (62) is driven to rotate by the wedge block (67), the winding disk (3) tightens the pull rope (31).

8. A landslide deformation monitoring device according to claim 7, characterized in that: The constant force spring (53) drives the winding drum (3) to tighten the pull rope (31) when passively restoring the initial state.

9. A landslide deformation monitoring device according to claim 8, characterized in that: The rotary encoder (43) and the motor (69) are both electrically connected to the battery (73).

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