Low-speed landslide displacement sensor and landslide displacement real-time monitoring and early warning system

Abstract

The application discloses a low-speed landslide displacement sensor and a landslide displacement real-time monitoring and early warning system. The sensor comprises a shell, a transmission assembly and a power generation assembly. The transmission assembly comprises a pull rope, a winding drum and an accelerator, the pull rope is wound on the winding drum and extends out of the shell, and the winding drum is connected with the input end of the accelerator. The power generation assembly comprises a first friction electrode, a second friction electrode, a medium layer and a force storage structure, the first friction electrode is fixedly connected in the shell, the second friction electrode is connected with the output end of the accelerator, the medium layer is fixedly connected on the second friction electrode and is in contact with the first friction electrode, and the force storage structure is in abutment with the second friction electrode, the force storage structure is used for exerting resistance on the rotation of the second friction electrode relative to the first friction electrode, and the rotation of the second friction electrode is released when the second friction electrode overcomes the resistance. The low-speed landslide displacement sensor can generate a high-resolution self-driven voltage pulse, and realizes the measurement of the ultra-low-speed landslide displacement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, and in particular to a low-speed landslide displacement sensor and a landslide displacement real-time monitoring and early warning system. BACKGROUND

[0002] Landslide disaster is one of the most frequent natural disasters with wide distribution and great harm. Surface deformation displacement monitoring of landslide is crucial for analyzing the degree of landslide danger and evolution law, and is helpful for taking timely measures to avoid casualties and economic losses. At present, a large number of sensing instruments are arranged in hidden danger points and disaster occurrence blind areas for scientific monitoring and early warning of the gestation process of landslide, which will bring extremely high energy supply problems and installation and implementation costs. However, the surface deformation displacement of landslide is ultra-low speed deformation with mm / d (millimeter / day) as the unit, and the daily deformation amount of the surface of landslide is below 10 mm most of the time, which requires the sensor to have high displacement resolution and range, and the existing displacement sensor is difficult to generate effective sensing signals under such ultra-low speed working conditions. SUMMARY

[0003] The present application provides a low-speed landslide displacement sensor and a landslide displacement real-time monitoring and early warning system to realize ultra-low speed landslide displacement measurement.

[0004] In one aspect, the present application provides a low-speed landslide displacement sensor, which comprises a shell, a transmission assembly and a power generation assembly. The shell has an accommodating space inside, and the transmission assembly and the power generation assembly are arranged inside the shell. The shell is provided with a through hole communicating the inside and the outside of the shell. The transmission assembly comprises a pull rope, a winding drum and an accelerator. The pull rope is wound on the winding drum, and the pull rope extends out of the shell through the through hole. The winding drum is connected with the input end of the accelerator. When the winding drum is driven to rotate by the pull rope, the input end of the accelerator is driven to rotate by the winding drum. The power generation assembly comprises a first friction electrode, a second friction electrode, a dielectric layer and a force storage structure. The first friction electrode is fixedly connected inside the shell. The second friction electrode is connected with the output end of the accelerator. The second friction electrode is arranged opposite to the first friction electrode, and can be driven to rotate relative to the first friction electrode by the output end of the accelerator. The dielectric layer is fixedly connected on the side of the second friction electrode facing the first friction electrode, and the dielectric layer is in contact with the first friction electrode. The force storage structure is fixedly connected inside the shell, and abuts against the second friction electrode. The force storage structure is used for applying resistance to the rotation of the second friction electrode, and releasing the rotation of the second friction electrode when the second friction electrode overcomes the resistance.

[0005] According to one aspect of the present application, the force storage structure comprises a spring sheet, and one end of the spring sheet is fixedly connected inside the shell. A gear structure is fixedly connected on the side of the second friction electrode away from the first friction electrode, and the gear structure can rotate together with the second friction electrode. The other end of the spring sheet abuts against the gear teeth of the gear structure.

[0006] According to an aspect of the embodiment of the present application, the shell comprises a first shell and a second shell connected together, the transmission assembly is arranged inside the first shell, and the output end of the accelerator extends into the second shell; the power generation assembly is arranged inside the second shell.

[0007] According to an aspect of the embodiment of the present application, the inner wall of the first shell is provided with a winding drum limiting groove and an accelerator limiting groove, the outer wall of the winding drum is sleeved with a bearing, and the winding drum abuts against the winding drum limiting groove through the bearing; the accelerator is located in the accelerator limiting groove.

[0008] According to an aspect of the embodiment of the present application, the outer wall of the first shell is provided with a first step structure and a second step structure. The shell is externally provided with a base, the first surface of the base is fixedly connected with a limiting frame, the limiting frame is provided with a positioning hole; the first surface of the base is also fixedly connected with a first support, the first support is arranged in a spaced manner with the limiting frame, and the first support is provided with a first fixing hole. The first step structure is connected in the positioning hole of the limiting frame, and the second step structure is connected in the first fixing hole of the first support.

[0009] According to an aspect of the embodiment of the present application, the outer wall of the winding drum is sleeved with a pull rope positioning ring, the pull rope positioning ring has a pull rope positioning groove; the pull rope positioning groove has a gap, the gap is provided with a pull rope fixing hole, one end of the pull rope is fixed in the pull rope fixing hole, the pull rope is wound in the pull rope positioning groove, and the other end of the pull rope extends out of the shell through the through hole.

[0010] According to an aspect of the embodiment of the present application, the first friction electrode comprises a PCB interdigital electrode, the second friction electrode comprises a PCB grating electrode, the number of electrode pairs of the PCB interdigital electrode is the same as the number of electrodes of the PCB grating electrode, and the width of a single electrode of the PCB interdigital electrode is the same as the width of a single electrode of the PCB grating electrode.

[0011] According to an aspect of the embodiment of the present application, the first friction electrode further comprises a first fixed ring, the first fixed ring is fixedly connected with the end of the second step structure of the first shell, and the PCB interdigital electrode is fixedly connected on the first fixed ring. The second friction electrode further comprises a second fixed ring, the PCB grating electrode is fixedly connected on the second fixed ring, and the PCB grating electrode is sleeved on the output end of the accelerator through the coaxially arranged bearing structure.

[0012] According to an aspect of the embodiment of the present application, the side of the first friction electrode away from the second friction electrode is provided with a first magnetic member, and the side of the second friction electrode away from the first friction electrode is provided with a second magnetic member.

[0013] In another aspect, the embodiment of the present application provides a landslide displacement real-time monitoring and early warning system, comprising a single-chip microcomputer, a display and the low-speed landslide displacement sensor as described above, the low-speed landslide displacement sensor is electrically connected with the single-chip microcomputer, and the display is electrically connected with the single-chip microcomputer.

[0014] The low-speed landslide displacement sensor provided by the embodiment of the present application is used to convert the displacement information into the angle information when the surface deformation displacement of the landslide and other external displacement excitations are input through the pull rope, the angle information is transmitted to the second friction electrode after being amplified by the accelerator, the second friction electrode is intermittently rotated under the blocking action of the force storage structure, the relative rotation is generated between the medium layer fixed on the second friction electrode and the first friction electrode, the opposite charges are generated between the medium layer and the first friction electrode due to the principle of friction electrification or contact electrification, the first friction electrode is connected to the two ends of the external load in the actual application, the charge transfer is realized under the action of the electrostatic balance, and the alternating current signal reflecting the relative displacement change of the pull rope is generated outside. The force storage structure can realize the real-time feedback under the extremely low-speed displacement input speed, the input signal information is amplified by the accelerator, the starting speed of the sensor is effectively reduced, the resolution of the displacement monitoring of the sensor is improved, and the ultra-low-speed landslide displacement measurement is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 The overall structure schematic diagram of the low-speed landslide displacement sensor provided by the embodiment of the present application is shown in the figure.

[0017] Figure 2 The explosion structure schematic diagram of the low-speed landslide displacement sensor provided by the embodiment of the present application is shown in the figure.

[0018] Figure 3 The structure schematic diagram of the base of the low-speed landslide displacement sensor provided by the embodiment of the present application is shown in the figure.

[0019] Figure 4 The structure schematic diagram of the first support of the low-speed landslide displacement sensor provided by the embodiment of the present application is shown in the figure.

[0020] Figure 5 The structure schematic diagram of the first part of the first shell of the low-speed landslide displacement sensor provided by the embodiment of the present application is shown in the figure.

[0021] Figure 6A structural schematic view of a second part of a first shell of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0022] Figure 7 A structural schematic view of a second shell of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0023] Figure 8 A structural schematic view of a pull rope of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0024] Figure 9 A structural schematic view of a winding drum of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0025] Figure 10 A structural schematic view of a connecting piece of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0026] Figure 11 A structural schematic view of an accelerator of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0027] Figure 12 A structural schematic view of a power generation assembly of a low-speed landslide displacement sensor provided by an embodiment of the present application, in two different perspectives;

[0028] Figure 13 A structural schematic view of a second support of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0029] Figure 14 A structural schematic view of a first friction electrode of a low-speed landslide displacement sensor provided by an embodiment of the present application, in two different perspectives;

[0030] Figure 15 A structural schematic view of a medium layer of a low-speed landslide displacement sensor provided by an embodiment of the present application;

[0031] Figure 16 A structural schematic view of a second friction electrode of a low-speed landslide displacement sensor provided by an embodiment of the present application, in three different perspectives;

[0032] Figure 17 A schematic view of a landslide displacement real-time monitoring and early warning system provided by an embodiment of the present application.

[0033] Reference signs:

[0034] 100 - shell, 200 - transmission assembly, 300 - power generation assembly;

[0035] 110 - base, 120 - first part, 130 - second part, 140 - first support, 150 - second support, 160 - second shell;

[0036] 210-pulling rope, 220-winding drum, 230-accelerator, 240-connector;

[0037] 310-first friction electrode, 320-dielectric layer, 330-second friction electrode, 340-first magnetic piece, 350-second magnetic piece, 360-gear structure, 370-spring sheet;

[0038] 111-limiting frame, 112-first surface, 121-first winding drum limiting groove, 122-first accelerator limiting groove, 123-through hole, 124-first step structure I, 125-second step structure I, 131-second winding drum limiting groove, 132-second accelerator limiting groove, 133-first step structure II, 134-second step structure II, 141-first fixing hole, 142-pre-tightening clamp, 151-fixing groove;

[0039] 221-pulling rope positioning groove, 222-pulling rope fixing hole, 223-inner spline, 224-bearing mounting area, 231-input end, 232-output end, 241-outer spline, 242-spline inner ring;

[0040] 311-PCB interdigital electrode, 312-first fixing ring, 331-PCB grating electrode, 332-second fixing ring, 333-bearing structure. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be further described in detail with reference to the drawings and examples. The detailed description and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described examples.

[0042] In the description of the present application, it should be noted that, unless otherwise specified, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the meaning of "multiple" is two or more; the terms "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as limiting the present application.

[0043] Please refer to Figure 1 and Figure 2The embodiment of the application provides a low-speed landslide displacement sensor, which comprises a shell 100, a transmission assembly 200 and a power generation assembly 300. The shell 100 has an accommodating space inside, the transmission assembly 200 and the power generation assembly 300 are arranged inside the shell 100, and the shell 100 is provided with a through hole 123 communicating the inside and the outside of the shell 100.

[0044] The transmission assembly 200 comprises a pull rope 210, a winding drum 220 and an accelerator 230. The pull rope 210 is wound on the winding drum 220, and the pull rope 210 extends out of the shell 100 through the through hole 123. The winding drum 220 is connected with the input end of the accelerator 230. When the pull rope 210 drives the winding drum 220 to rotate, the winding drum 220 drives the input end of the accelerator 230 to rotate.

[0045] The power generation assembly 300 comprises a first friction electrode 310, a second friction electrode 330, a dielectric layer 320 and a force storage structure. The first friction electrode 310 is fixedly connected inside the shell 100. The second friction electrode 330 is connected with the output end of the accelerator 230. The second friction electrode 330 is arranged opposite to the first friction electrode 310 and can rotate relative to the first friction electrode 310 under the drive of the output end of the accelerator 230. The dielectric layer 320 is fixedly connected to one side of the second friction electrode 330 facing the first friction electrode 310 and is in contact with the first friction electrode 310. The force storage structure is fixedly connected inside the shell 100 and abuts against the second friction electrode 330. The force storage structure is used for exerting resistance on the rotation of the second friction electrode 330 and releasing the rotation of the second friction electrode 330 when the second friction electrode 330 overcomes the resistance.

[0046] In actual application, when the surface deformation displacement or other external displacement excitation of a landslide is input into the displacement sensor of the embodiment of the application through the pull rope 210, the winding drum 220 rotates under the action of the pull rope 210, converts the displacement information into angle information, the angle information is transmitted to the second friction electrode 330 after being amplified by the accelerator 230, the second friction electrode 330 rotates intermittently under the resistance of the force storage structure, the dielectric layer 320 fixed on the second friction electrode 330 and the first friction electrode 310 relatively rotate, opposite charges are generated between the dielectric layer 320 and the first friction electrode 310 due to the principle of friction electrification or contact electrification. In actual application, the first friction electrode 310 is connected to both ends of an external load. Under the action of electrostatic balance, charge transfer is realized, thereby generating an alternating current signal outside, which can reflect the relative displacement change of the pull rope 210.

[0047] The displacement sensor of the embodiment of the present application can realize self-power supply, that is, the sensor itself does not need to be powered and can directly generate an electric signal by relying on the landslide deformation force for driving. Moreover, the force storage structure can realize real-time feedback under an extremely low-speed displacement input speed, amplify the input signal information through an accelerator, effectively reduce the starting speed of the sensor, improve the resolution of the displacement monitoring of the sensor, and the sensor can generate a high-resolution self-driven voltage pulse to realize ultra-low-speed landslide displacement measurement. Meanwhile, the displacement sensor can realize real-time displacement, displacement speed monitoring and early warning through signal processing and threshold setting, has the ability to monitor mm / d level ultra-low-speed displacement, has technical advantages such as a large range, high resolution, low error rate, high signal-to-noise ratio and the like, can be applied to long-term (several months to several years) real-time monitoring and early warning of landslide surface deformation displacement, has important significance and engineering application value for improving the regional and intelligent level of landslide disaster monitoring and early warning, has potential application value in the field of natural disaster early warning and structure health monitoring, and can promote the development of triboelectric sensors in the field of landslide displacement monitoring and early warning.

[0048] In a specific implementation, the shell 100 includes a first shell and a second shell 160 connected together, the transmission assembly is arranged inside the first shell, and the output end of the accelerator extends into the inside of the second shell 160; the second shell 160 can sleeve part of the first shell, and the power generation assembly 300 is arranged inside the second shell 160. The inner wall of the first shell is provided with a winding drum limiting groove and an accelerator limiting groove, the outer wall of the winding drum 220 is sleeved with a bearing, and the winding drum 220 abuts against the winding drum limiting groove through the bearing; the accelerator 230 is located in the accelerator limiting groove, and there is a gap between the accelerator 230 and the accelerator limiting groove.

[0049] As shown in Figure 3 , the outer wall of the first shell is provided with a first step structure and a second step structure. The shell is provided with a base 110, and the first surface 112 (top surface) of the base 110 is fixedly connected with a limiting frame 111 provided with a positioning hole. As shown in Figure 4 , the first surface 112 of the base 110 is also fixedly connected with a first support 140, and the first support 140 is fixedly connected with the first surface 112 of the base 110 through a fixing bolt. The first support 140 is arranged in a spaced manner with the limiting frame 111, and the first support 140 is provided with a first fixing hole 141; the first support 140 has an opening, and the opening is provided with a pre-tightening clamp 142, which can adjust the aperture of the first fixing hole 141. The first step structure is connected in the positioning hole of the limiting frame 111, and the second step structure is connected in the first fixing hole 141 of the first support 140.

[0050] In a specific implementation, as shown in Figure 5 , Figure 6 and Figure 7As shown, the first shell includes a first part 120 and a second part 130, which are buckled to form the first shell. The first shell 120 is provided with a first winding drum limiting groove 121, a first accelerator limiting groove 122, a first step structure I 124, and a second step structure I 125; the second part 130 is provided with a second winding drum limiting groove 131, a second accelerator limiting groove 132, a first step structure II 133, and a second step structure II 134; the first winding drum limiting groove 121 and the second winding drum limiting groove 131 constitute the winding drum limiting groove mentioned above; the first accelerator limiting groove 122 and the second accelerator limiting groove 132 constitute the accelerator limiting groove mentioned above; the first step structure I 124 and the first step structure II 133 constitute the first step structure mentioned above; and the second step structure I 125 and the second step structure II 134 constitute the second step structure mentioned above. The second shell 160 is fastened and connected to the first surface 112 of the base 110 by fixing bolts.

[0051] As shown in Figure 8 and Figure 9 The outer wall of the winding drum 220 is sleeved with a pull rope positioning ring, which has a pull rope positioning groove 221; the pull rope positioning groove 221 has a notch, and the notch is provided with a pull rope fixing hole 222, one end of the pull rope 210 is fixed in the pull rope fixing hole 222 by a fixing bolt, the pull rope 210 is wound in the pull rope positioning groove 221, and the other end of the pull rope 210 extends out of the shell through the through hole 123. The area on both sides of the pull rope positioning ring on the winding drum 220 is a bearing installation area 224, which is sleeved with a bearing, so that the winding drum 220 abuts against the winding drum limiting groove mentioned above through the bearing. The cooperation of the bearing and the winding drum 220, as well as the cooperation of the bearing and the winding drum limiting groove, can be interference fit.

[0052] As shown in Figure 10 and Figure 11As shown, the inside of the winding drum 220 is provided with a connecting piece 240 in the axial direction, and the input end of the accelerator 230 is connected with the winding drum 220 through the connecting piece 240. The connecting piece 240 can be a spline structure, and specifically, the connecting piece 240 includes an outer spline 241 and a spline inner ring 242; correspondingly, the inside of the winding drum 220 is provided with an inner spline 223, the outer spline 241 is clamped with the inner spline 223 to realize the connection of the connecting piece 240 with the winding drum 220, and the winding drum 220 can drive the connecting piece 240 to rotate when rotating. The input end 231 and the output end 232 of the accelerator 230 can be in the form of a shaft. The input end 231 of the accelerator 230 extends into the spline inner ring 242 to realize the connection of the accelerator 230 with the connecting piece 240, so as to realize the connection of the accelerator 230 with the winding drum 220, and the input end 231 of the accelerator 230 can be driven to rotate by the connecting piece 240 when the winding drum 220 rotates. The output end 232 of the accelerator 230 is connected with the inner ring of the gear structure 360 on the second friction electrode 330 to realize the rotation of the second friction electrode 330.

[0053] As a possible implementation, as shown in Figure 12 As shown, the force storage structure includes a spring sheet 370, one end of the spring sheet 370 is fixedly connected in the inside of the shell. The second friction electrode 330 is fixedly connected with a gear structure 360 on the side away from the first friction electrode 310, and the gear structure 360 can rotate together with the second friction electrode 330; the other end of the spring sheet 370 abuts against the gear teeth of the gear structure 360, and specifically, the other end of the spring sheet 370 is between the gear teeth of the gear structure 360 and abuts against the gear teeth when the gear structure 360 rotates. The gear 360 on the second friction electrode 330 is released once every other gear tooth under the blocking action of the spring sheet 370, so as to realize the intermittent rotation of the second friction electrode 330.

[0054] As shown in Figure 13 As shown, the first surface 112 of the base 110 is further fixedly connected with a second support 150, and the second support 150 is spaced apart from the first support 140 and is arranged at the end of the second shell 160 away from the first shell. The second support 150 is provided with a fixed groove 151, and the spring sheet 370 is fastened and connected with the fixed groove 151 through a fixed block and a fixed bolt to realize the positioning of the spring sheet 370.

[0055] As shown in Figure 14 , Figure 15 and Figure 16As shown, the first rubbing electrode 310 includes a PCB interdigital electrode 311, and the second rubbing electrode 330 includes a PCB grating electrode 331. The number of electrode pairs of the PCB interdigital electrode 311 is the same as the number of electrodes of the PCB grating electrode 331, and the width of a single electrode of the PCB interdigital electrode 311 is the same as the width of a single electrode of the PCB grating electrode 331. Specifically, the inner diameter of the PCB interdigital electrode 311, the dielectric layer 320, and the PCB grating electrode 331 is a, and the three are coaxially arranged. The outer diameter of the PCB interdigital electrode 311 is b, and the outer diameter of the dielectric layer 320 and the PCB grating electrode 331 is c. The number of electrode pairs of the PCB interdigital electrode 311 is the same as the number of electrodes of the PCB grating electrode 331, and both are d. In the circumferential direction, the electrode width of a single interdigital electrode of the PCB interdigital electrode 311 is equal to the electrode width of a single grating electrode of the PCB grating electrode 331, and both are e. The interval angle between adjacent electrodes of the PCB grating electrode 331 is f, and the interval angle between a pair of interdigital electrodes of the PCB interdigital electrode 311 is g. In order to ensure the stability of triboelectricity, b > c, e + 2g = f. Optionally, a = 16 mm, b = 60 mm, c = 56 mm, e = 2°, f = 3°, and g = 0.5°.

[0056] The dielectric layer 320 is thin film-shaped and is attached to the second rubbing electrode 330. The dielectric layer 320 is made of a thin film of a high polymer material having a triboelectric effect, such as a Kapton polyimide film, a PTFE (polytetrafluoroethylene) film, etc. The PCB interdigital electrode 311 and the PCB grating electrode 331 are both made of a PCB plate plated with a conductive metal film such as copper, aluminum, gold, etc. The triboelectric sequence of the conductive metal film is better than that of the dielectric layer 320, that is, the conductive metal film is more likely to lose electrons than the dielectric layer 320, and the greater the difference between the two, the better the power generation effect.

[0057] In specific implementation, the first friction electrode 310 further comprises a first fixing ring 312 fixedly connected with the second stepped structure end of the first shell, and the PCB interdigital electrode 311 is fixedly connected on the first fixing ring 312; the second friction electrode 330 further comprises a second fixing ring 332, and the PCB grating electrode 331 is fixedly connected on the second fixing ring 332, and the PCB grating electrode 331 is sleeved on the output end 232 of the accelerator 230 through the coaxially arranged bearing structure 333. The gear structure 360 is fixedly connected with the second fixing ring 332 of the second friction electrode 330, specifically, one side of the second fixing ring 332 is connected with the gear structure 360, and the other side of the second fixing ring 332 is pasted on the back of the PCB grating electrode 331, so that the gear structure 360 and the PCB grating electrode 331 form an integral whole through the second fixing ring 332. The output end 232 of the accelerator 230 is fixedly connected with the inner ring of the gear structure 360 through the bearing structure 333.

[0058] Referring again to Figure 12 , one side of the first friction electrode 310 away from the second friction electrode 330 is provided with a first magnetic member 340, and one side of the second friction electrode 330 away from the first friction electrode 310 is provided with a second magnetic member 350. Under the magnetic attraction between the first magnetic member 340 and the second magnetic member 350, the first friction electrode 310 and the second friction electrode 330 are pre-tightened, and the reliability of the triboelectricity is improved. The first magnetic member 340 can be a magnet ring, and the second magnetic member 350 can be a magnetic sheet. The first magnetic member 340 is fixedly connected on the PCB interdigital electrode 311 of the first friction electrode 310, and the second magnetic member 350 is fixedly connected on the PCB grating electrode 331 of the second friction electrode 330.

[0059] The application further provides a landslide displacement real-time monitoring and early warning system, as shown in Figure 17 , the system comprises a single-chip microcomputer, a display and a low-speed landslide displacement sensor as in the above embodiment, the low-speed landslide displacement sensor is electrically connected with the single-chip microcomputer, and the display is electrically connected with the single-chip microcomputer. When the displacement sensor is excited by the displacement of the landslide surface deformation, a corresponding electrical signal is generated, the signal is processed by the single-chip microcomputer (including filtering, pulse frequency extraction, pulse number calculation and amplitude extraction), and the displacement and displacement speed are obtained through linear conversion. According to the working conditions, the displacement and speed thresholds (pulse number and frequency) are set, and then the display (remote transmission) is connected, the display displays the displacement and displacement speed in real time, and when the landslide displacement and displacement speed reach the threshold conditions, the display prompts the deformation grade of the landslide surface and gives a graded alarm.

[0060] Those skilled in the art will appreciate that the foregoing description is by way of example only, and is not intended to limit the scope of the application as claimed. Those skilled in the art will appreciate that various modifications and variations of the application described herein will be apparent without departing from the spirit and scope of the application. Accordingly, it should be understood that the application is intended to cover all such modifications and variations as fall within the scope of the claims and their equivalents.

Claims

1. A low velocity landslide displacement sensor, characterized by, The shell, the transmission assembly and the power generation assembly are included. The shell has a containing space inside, the transmission assembly and the power generation assembly are arranged inside the shell, and the shell is provided with a through hole communicating the inside and the outside of the shell. The transmission assembly includes a pull rope, a winding drum and an accelerator, the pull rope is wound on the winding drum, and the pull rope extends out of the shell through the through hole; the winding drum is connected with the input end of the accelerator, and when the winding drum rotates driven by the pull rope, the winding drum drives the input end of the accelerator to rotate. The power generation assembly includes a first friction electrode, a second friction electrode, a dielectric layer and a force storage structure, the first friction electrode is fixedly connected inside the shell; the second friction electrode is connected with the output end of the accelerator, the second friction electrode is arranged opposite to the first friction electrode, and the second friction electrode can rotate relative to the first friction electrode driven by the output end of the accelerator; the dielectric layer is fixedly connected on the side of the second friction electrode facing the first friction electrode, and the dielectric layer is in contact with the first friction electrode; the force storage structure is fixedly connected inside the shell, and the force storage structure abuts against the second friction electrode, the force storage structure is used for applying resistance to the rotation of the second friction electrode, and releasing the rotation of the second friction electrode when the second friction electrode overcomes the resistance.

2. The low velocity landslide displacement sensor of claim 1, wherein, The force storage structure includes a spring sheet, one end of the spring sheet is fixedly connected inside the shell. The side of the second friction electrode away from the first friction electrode is fixedly connected with a gear structure, the gear structure can rotate together with the second friction electrode; the other end of the spring sheet abuts against the gear teeth of the gear structure.

3. The low velocity landslide displacement sensor of claim 1, wherein, The shell includes a first shell and a second shell connected with each other, the transmission assembly is arranged inside the first shell, and the output end of the accelerator extends into the second shell; the power generation assembly is arranged inside the second shell.

4. The low velocity landslide displacement sensor of claim 3, wherein, The inner wall of the first shell is provided with a winding drum limiting groove and an accelerator limiting groove, the outer wall of the winding drum is sleeved with a bearing, and the winding drum abuts against the winding drum limiting groove through the bearing; the accelerator is located in the accelerator limiting groove.

5. The low velocity landslide displacement sensor of claim 3, wherein, The outer wall of the first shell is provided with a first step structure and a second step structure; The outer wall of the first shell is provided with a first step structure and a second step structure; The first face of the base is fixedly connected with a limiting frame, the limiting frame is provided with a positioning hole; the first face of the base is also fixedly connected with a first support, the first support is arranged at intervals with the limiting frame, and the first support is provided with a first fixing hole; 6. The low velocity landslide displacement sensor of claim 1, wherein, The first step structure is connected in the positioning hole of the limiting frame, and the second step structure is connected in the first fixing hole of the first support. The outer wall of the winding drum is sleeved with a pull rope positioning ring, the pull rope positioning ring has a pull rope positioning groove; the pull rope positioning groove has a notch, the notch is provided with a pull rope fixing hole, one end of the pull rope is fixed in the pull rope fixing hole, the pull rope is wound in the pull rope positioning groove, and the other end of the pull rope extends out of the shell through the through hole.

7. The low velocity landslide displacement sensor of claim 5, wherein, The first friction electrode comprises a PCB interdigital electrode, the second friction electrode comprises a PCB grating electrode, the number of electrode pairs of the PCB interdigital electrode is the same as the number of electrodes of the PCB grating electrode, and the width of a single electrode of the PCB interdigital electrode is the same as the width of a single electrode of the PCB grating electrode.

8. The low velocity landslide displacement sensor of claim 7, wherein, The first friction electrode further comprises a first fixing ring, the first fixing ring is fixedly connected with the second stepped structure end of the first shell, and the PCB interdigital electrode is fixedly connected on the first fixing ring. The second friction electrode further comprises a second fixing ring, the PCB grating electrode is fixedly connected on the second fixing ring, and the PCB grating electrode is sleeved on the output end of the accelerator through a coaxially arranged bearing structure.

9. The low velocity landslide displacement sensor according to any one of claims 1 to 8, characterized in that, The side, away from the second friction electrode, of the first friction electrode is provided with a first magnetic member, and the side, away from the first friction electrode, of the second friction electrode is provided with a second magnetic member.

10. A landslide displacement real-time monitoring and early warning system, characterized in that, The low-speed landslide displacement sensor comprises a single-chip microcomputer and a display, the low-speed landslide displacement sensor is electrically connected with the single-chip microcomputer, and the display is electrically connected with the single-chip microcomputer.

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