A self-powered displacement sensor, a mountain landslide monitoring system and method

Abstract

The application provides a self-powered displacement sensor, a mountain landslide monitoring system and a method. The self-powered displacement sensor is used for being buried in a to-be-monitored mountain to monitor whether a landslide occurs in the to-be-monitored mountain. When the to-be-monitored mountain has a landslide, the self-powered displacement sensor generates a corresponding electrical signal. The principle that the self-powered displacement sensor generates the corresponding electrical signal when the to-be-monitored mountain has a landslide is consistent with that of a friction nanogenerator. The working modes of the friction nanogenerator at least include a vertical contact-separation mode, a horizontal sliding mode, a single electrode mode and an independent layer mode. According to the application, an external power supply is not needed, and the corresponding electrical signal can be generated when the to-be-monitored mountain has a landslide based on the principle of the friction nanogenerator. Therefore, the reliability of the sensor is improved, and the research and development and manufacturing costs of the sensor are reduced.

Description

[Technical Field]

[0001] This application relates to the technical field of sensors, and in particular to a self-powered displacement sensor, a landslide monitoring system and method. [Background Technology]

[0002] The causes of landslides are twofold: firstly, there has been a lack of thorough investigation and analysis of potential geological hazards; secondly, there is a lack of awareness of the need to prevent existing geological hazards, and a precise landslide monitoring system has not been established in a timely manner. Although engineering measures, such as altering slope geometry, reducing slope gradient, improving drainage systems, and strengthening retaining walls, can reduce the risk and harm of landslides to some extent, landslides, as an important part of natural phenomena, cannot be completely eliminated. Therefore, landslide monitoring is essential.

[0003] In related technologies, displacement is one of the important indicators for landslide monitoring, and there are various monitoring methods. Several examples will be given below to illustrate this. Geodetic methods measure displacement using high-precision optical instruments. They can monitor displacement deformation at key points on the mountainside, covering a wide area and effectively monitoring and determining slope deformation. However, they are easily affected by terrain visibility and weather conditions (such as wind, rain, fog, and snow), resulting in a large workload, long monitoring cycles, and poor continuous monitoring capabilities. Landslide monitoring methods based on satellite and ground remote sensing technologies have advantages such as high accuracy, high efficiency, wide coverage, and the ability to automatically monitor 24 hours a day. They can reduce the time required for compilation and system updates. However, potential problems such as excessive vegetation growth and limitations in nighttime capture make accurate monitoring from optical images difficult and prone to false alarms. Furthermore, they are expensive to maintain and have difficulty identifying ground-level landslides. While landslide monitoring methods based on technologies such as aperture radar and distributed fiber optic sensors can achieve large-scale and accurate displacement monitoring, their limitations in the cost and complexity of the monitoring system, as well as the requirements for external power supply, prevent them from being widely adopted in remote mountainous areas prone to landslides.

[0004] Therefore, it is necessary to design displacement sensors for monitoring landslides. [Summary of the Invention]

[0005] This application provides a self-powered displacement sensor, a landslide monitoring system and method, aiming to solve the problems of low reliability and high cost of displacement sensors for monitoring landslides in related technologies.

[0006] To address the aforementioned technical problems in related technologies, the first aspect of this application provides a self-powered displacement sensor for embedding in a mountain to be monitored to monitor whether a landslide has occurred. When a landslide occurs in the mountain, the self-powered displacement sensor generates a corresponding electrical signal. The principle by which the self-powered displacement sensor generates a corresponding electrical signal when a landslide occurs in the mountain is consistent with that of a triboelectric nanogenerator. The operating modes of the triboelectric nanogenerator include at least a vertical contact-separation mode, a horizontal sliding mode, a single-electrode mode, and an independent layer mode.

[0007] The second aspect of this application provides a landslide monitoring system, which includes: a plurality of self-powered displacement sensors as described in the first aspect of this application, each of which is buried at a different location within the mountain to be monitored; a signal acquisition unit electrically connected to each of the self-powered displacement sensors, used to receive electrical signals generated by the self-powered displacement sensors at the corresponding locations when a landslide occurs in the mountain to be monitored, and to convert the electrical signals into digital signals; and a display communicatively connected to the signal acquisition unit, used to receive the digital signals and perform corresponding displays.

[0008] The third aspect of this application provides a method for monitoring landslides, comprising: a self-powered displacement sensor as described in the first aspect of this application generates a corresponding electrical signal when a landslide occurs in the monitored mountain, wherein the self-powered displacement sensor is buried in the monitored mountain; a signal acquisition unit receives the electrical signal and converts the electrical signal into a digital signal; and a display receives the digital signal and displays it accordingly.

[0009] As can be seen from the above description, compared with related technologies, the beneficial effects of this application are as follows: when a landslide occurs in the monitored mountain, the self-powered displacement sensor will generate a corresponding electrical signal, and the principle of generating the corresponding electrical signal is the same as that of the triboelectric nanogenerator. In other words, this application applies the triboelectric nanogenerator to the monitoring of landslides. For the triboelectric nanogenerator, it can convert energy in the environment into electrical energy. When two different materials are in contact, due to their different electronegativity, their surfaces will carry positive and negative charges respectively. When the surfaces of the two materials separate, the positive and negative charges carried on the surfaces of the two materials will also separate, thereby forming an induced electromotive force, that is, generating a corresponding electrical signal. This allows the triboelectric nanogenerator to achieve self-powering without the need for an external power source. In this application, the landslide in the monitored mountain is the reason for the separation of the surfaces of the two different materials. Therefore, the self-powered displacement sensor provided by this application can generate a corresponding electrical signal when a landslide occurs in the monitored mountain. Therefore, this application demonstrates that it can generate corresponding electrical signals when a landslide occurs on the monitored mountain without the need for an external power source, based on the principle of triboelectric nanogenerators. Moreover, triboelectric nanogenerators have advantages such as high output, high energy conversion efficiency, and low manufacturing cost. This makes the sensor less susceptible to the influence of terrain visibility and weather conditions, with strong continuous monitoring capabilities, less prone to false alarms, and high monitoring accuracy. It can quickly locate the position of the landslide on the monitored mountain, which undoubtedly improves the reliability of the sensor and reduces the research and development and manufacturing costs of the sensor. [Attached Image Description]

[0010] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a first system block diagram of a landslide monitoring system provided in an embodiment of this application;

[0012] Figure 2 This is a second system block diagram of the landslide monitoring system provided in the embodiments of this application;

[0013] Figure 3 This is a schematic diagram of the structure of the self-powered displacement sensor provided in the embodiments of this application;

[0014] Figure 4 This is a schematic diagram of the structure of the sensing unit provided in the embodiments of this application;

[0015] Figure 5 A schematic diagram of the output voltage of the self-powered displacement sensor provided in the embodiments of this application under different sliding distances;

[0016] Figure 6 A schematic diagram of the output voltage of the self-powered displacement sensor provided in this application embodiment at different sliding speeds;

[0017] Figure 7 This is a flowchart illustrating the landslide monitoring method provided in this application embodiment.

Detailed Implementation Methods

[0018] To make the objectives, technical solutions, and advantages of this application more apparent and understandable, this application will be clearly and completely described below in conjunction with its embodiments and corresponding drawings. Throughout, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. It should be understood that the various embodiments of this application described below are only for explaining this application and are not intended to limit this application. That is, all other embodiments obtained by those skilled in the art based on the various embodiments of this application without creative effort are within the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0019] Figure 1 This is a first system block diagram of a landslide monitoring system provided in an embodiment of this application. In some embodiments, the landslide monitoring system 100 includes a signal acquisition unit 120, a display unit 130, and multiple displacement sensors 110 buried at different locations within the mountain to be monitored. The display unit 130 is communicatively connected to the signal acquisition unit 120, and the signal acquisition unit 120 is electrically connected to each displacement sensor 110. In practical applications, when no landslide occurs in the mountain to be monitored, the displacement sensors 110 do not generate electrical signals. When a landslide occurs in the mountain to be monitored, the displacement sensors 110 at the corresponding locations will generate corresponding electrical signals due to sensing the landslide. The signal acquisition unit 120 then receives these electrical signals and converts them into digital signals to be sent to the display unit 130. After receiving the digital signals sent by the signal acquisition unit 120, the display unit 130 will display the corresponding information, which may include, but is not limited to, displaying the location coordinates of the landslide and the magnitude of the generated voltage, thereby realizing the monitoring of the mountain to be monitored and quickly locating the landslide.

[0020] As one example, please refer to Figure 2The second system block diagram of the landslide monitoring system 100 shown indicates that the signal acquisition unit 120 employs a microcontroller with multi-channel signal acquisition capabilities. It may include a receiving unit 121, an analog-to-digital converter 122, and a communication unit 123. The receiving unit 121 is electrically connected to each displacement sensor 110 and is used to receive electrical signals generated by the displacement sensors 110 at the corresponding locations when a landslide occurs in the monitored mountain. The analog-to-digital converter 122 performs analog-to-digital conversion on the electrical signals received by the receiving unit 121 to obtain corresponding digital signals. The communication unit 123 sends the digital signals obtained by the analog-to-digital converter 122 to the display 130 for subsequent display. In some implementations of this embodiment, the communication unit 123 uses wireless communication, including but not limited to Bluetooth and Wi-Fi. The above embodiments are merely preferred implementations of this application and are not the only limitations on the landslide monitoring system 100. Those skilled in the art can flexibly configure the system based on the above embodiments and the actual application scenario.

[0021] As can be seen from the landslide monitoring system 100 using displacement sensor 110 to monitor landslides, displacement is one of the important indicators for landslide monitoring. There are various methods for displacement monitoring, and several examples will be given below to illustrate this. Geodetic methods measure displacement using high-precision optical instruments. They can monitor displacement deformation at key points of the mountain, covering a wide area and effectively monitoring and determining slope deformation. However, they are easily affected by terrain visibility and weather conditions (such as wind, rain, fog, and snow), resulting in a large workload, long cycle, and poor continuous monitoring capability. Landslide monitoring methods based on satellite and ground remote sensing technologies have advantages such as high accuracy, high efficiency, wide range, and the ability to automatically monitor 24 hours a day. They can reduce the time required for compilation and system updates. However, potential problems such as excessive vegetation growth and limitations in nighttime capture make accurate monitoring from optical images difficult and prone to false alarms. Furthermore, they are expensive to maintain and have difficulty identifying ground-level landslides. While landslide monitoring methods based on aperture radar and distributed fiber optic sensors can achieve large-scale and accurate displacement monitoring, their limitations in cost, complexity, and external power supply requirements hinder their widespread adoption in remote mountainous areas prone to landslides. Understandably, these landslide monitoring methods undoubtedly reduce the reliability of the displacement sensor 110 and increase its manufacturing cost. Therefore, this application embodiment improves the structure of the displacement sensor 110 in the landslide monitoring system 100 and proposes a self-powered displacement sensor.

[0022] In some embodiments, a self-powered displacement sensor is used to be buried in the mountain to be monitored to monitor whether a landslide has occurred. When a landslide occurs in the mountain, the self-powered displacement sensor will generate a corresponding electrical signal, while when no landslide occurs in the mountain, the self-powered displacement sensor will not generate a corresponding electrical signal. Specifically, the principle by which a self-powered displacement sensor generates a corresponding electrical signal when a landslide occurs on the monitored mountain is the same as that of a triboelectric nanogenerator. In other words, this application applies the triboelectric nanogenerator to the monitoring of landslides. A triboelectric nanogenerator can convert energy in the environment into electrical energy. When two different materials come into contact, their surfaces carry positive and negative charges respectively due to their different electronegativity. When their surfaces separate, the positive and negative charges on their surfaces also separate, thus forming an induced electromotive force, which generates a corresponding electrical signal. This allows the triboelectric nanogenerator to be self-powered without an external power source. Furthermore, triboelectric nanogenerators have advantages such as high output, high energy conversion efficiency, and low manufacturing cost. Therefore, they have been successfully applied to harvest energy from vibration, acoustics, wind, water, and biomechanics, and have also shown great potential as self-powered sensors, such as in water / ethanol detection, wind speed sensing, and micro-liquid biological and chemical sensing. In these embodiments, the landslide of the monitored mountain is the cause of the separation of the surfaces of the two different materials. Therefore, the self-powered displacement sensor provided in this application can generate a corresponding electrical signal when a landslide occurs in the monitored mountain. It should be noted that the working modes of the triboelectric nanogenerator include at least the vertical contact-separation mode, the horizontal sliding mode, the single electrode mode, and the independent layer mode. When the principle of the self-powered displacement sensor generating a corresponding electrical signal when a landslide occurs in the monitored mountain is consistent with that of the triboelectric nanogenerator in different working modes, it indicates that the self-powered displacement sensor should have some differences in its specific structural composition. The specific structural composition of the self-powered displacement sensor will be illustrated below with examples based on the working modes of the triboelectric nanogenerator.

[0023] As one example, please refer to Figure 3 The schematic diagram of the self-powered displacement sensor provided in the embodiment of this application is shown. Figure 4The schematic diagram of the sensing unit provided in the embodiment of this application shows that when the self-powered displacement sensor 300 generates a corresponding electrical signal when a landslide occurs in the monitored mountain, the principle is the same as that of the triboelectric nanogenerator in the single-electrode mode. The self-powered displacement sensor 300 includes a main body 310 and multiple sensing units 320. The sensing unit 320 includes a first sensing element 321 disposed on the inner wall of the main body 310, a second sensing element 322 in contact with the first sensing element 321, an inner magnetic attraction element 323 bonded to the side of the second sensing element 322 away from the inner wall of the main body 310, and an outer magnetic attraction element 324 disposed on the outer wall of the main body 310 and corresponding to the inner magnetic attraction element 323. The first sensing element 321 of each sensing unit 320 is used to electrically connect to the signal acquisition unit 120, and the first sensing element 321 serves as both a friction layer and an electrode layer. In practical applications, when the monitored mountain has not experienced a landslide, the magnetic attraction between the inner magnetic element 323 and the outer magnetic element 324 fixes the second sensing element 322 relative to the first sensing element 321, and no electrical signal is generated at this time. When a landslide occurs, the soil and rocks generated by the landslide will slide under the action of gravity. The sliding of the soil and rocks will cause the outer magnetic element 324 to slide. The sliding of the outer magnetic element 324 will cause the inner magnetic element 323 to drive the second sensing element 322 to slide synchronously relative to the first sensing element 321 and generate a corresponding electrical signal. The second sensing element 322 slides relative to the first sensing element 321, which means that the first sensing element 321 and the second sensing element 322, as the friction layer of the self-powered displacement sensor, generate a corresponding electrical signal through friction during the relative sliding process. At this time, the first sensing element 321 needs to be used as an electrode layer, and it needs to be conductive. Therefore, this embodiment of the application does not require an external power supply and can generate an electrical signal by the sliding of the second sensing element 322 relative to the first sensing element 321 caused by a landslide in the monitored mountain. Moreover, the process of this embodiment of the application is simpler, the design is more flexible, it is not easily affected by terrain visibility conditions and weather conditions, it has a strong continuous monitoring capability, it is not prone to false alarms, and the monitoring accuracy is high. It can quickly locate the location of the landslide in the monitored mountain. These features undoubtedly improve the reliability of the sensor and reduce the manufacturing cost of the sensor. In particular, because a large number of self-powered displacement sensors 300 are buried in different locations in the monitored mountain, the location of the landslide can be located based on which self-powered displacement sensor 300 generates the electrical signal.

[0024] In some implementations of this embodiment, the difference in triboeity between the first sensing element 321 and the second sensing element 322 is greater than a preset threshold. This indicates that the difference in triboeity between the first sensing element 321 and the second sensing element 322 should be sufficiently large. The purpose is to ensure that the magnitude of the corresponding electrical signal generated when the second sensing element 322 slides relative to the first sensing element 321 due to a landslide in the monitored mountain can meet the monitoring requirements of the landslide. In some implementations of this embodiment, the first sensing element 321 is made of aluminum foil tape, and the second sensing element 322 is made of polytetrafluoroethylene (PTFE). In this case, the triboeity between aluminum and PTFE is sufficiently high. Of course, the materials of the first sensing element 321 and the second sensing element 322 can actually be common materials used in triboelectric nanogenerators. For the first sensing element 321, as an electrode layer, it only needs to be conductive. That is to say, it is not limited to aluminum. It can also be other electrode materials commonly used in the art, such as copper, silver, alloys, etc. For the second sensing element 322, its material can be fluoropolymer, silicon polymer, chlorinated polymer, etc. In addition to PTFE mentioned above, common materials include polydimethylsiloxane, polyvinyl chloride, etc. In some implementations of this embodiment, the combined structure of the second sensing element 322 and the inner magnetic element 323 bonded together can be replaced with other structures commonly used in the art, as long as the triboeity difference between the replaced structure and the first sensing element 321 is sufficiently large and it is magnetic. In some implementations of this embodiment, both the inner magnetic element 323 and the outer magnetic element 324 can be arc-shaped magnets. In some implementations of this embodiment, the main body 310 adopts a cylindrical structure, but it is not limited to this shape. In other implementations, the shape of the main body 310 can also adopt other shapes commonly used in the art, such as elliptical, square, and trapezoidal. In some implementations of this embodiment, the material of the main body 310 is polyethylene terephthalate (PET). In some implementations of this embodiment, after all the sensing units 320 on the main body 310 are installed, the cylindrical structure of the main body 310 needs to be sealed for subsequent embedding into the mountain to be monitored.

[0025] The above embodiments are merely preferred implementations of this application and are not the only limitations on the self-powered displacement sensor 300. Those skilled in the art can flexibly customize these embodiments based on actual application scenarios. It should be noted that the above embodiments provide a structural composition of the self-powered displacement sensor 300 based on a single-electrode mode triboelectric nanogenerator. The first sensing element 321 and the second sensing element 322 are equivalent to two different materials used in the triboelectric nanogenerator, and the separation of the surfaces of these two different materials constitutes the sliding of the second sensing element 322 relative to the first sensing element 321. For other operating modes (such as vertical contact-separation mode, horizontal sliding mode, and independent layer mode), the structural composition of the self-powered displacement sensor 300 can be referenced from the triboelectric nanogenerator of the corresponding operating mode, and this application will not elaborate further. Furthermore, this application has conducted a series of experimental verifications, specifically using a 40×40mm second sensing element 322 (made of PTFE) to slide and rub against a 40mm wide first sensing element 321 (made of aluminum foil tape). Figure 5 and Figure 6 The output voltage of the self-powered displacement sensor 300 is displayed for different sliding distances and sliding speeds. Figure 5 and Figure 6 It can be clearly seen that even when the sliding speed is only 1cm, an output voltage of 3V can be detected. Similarly, a voltage of 2V can be detected when the sliding speed is only 0.1m / s. This shows that the monitoring sensitivity of the self-powered displacement sensor 300 can well meet the monitoring requirements of landslides.

[0026] Figure 7 This is a flowchart illustrating a landslide monitoring method provided in an embodiment of this application. In some embodiments, the landslide monitoring method includes: step 701, where a self-powered displacement sensor 300 generates a corresponding electrical signal when a landslide occurs in the monitored mountain; step 702, where a signal acquisition unit 120 receives the electrical signal generated by the self-powered displacement sensor 300 and converts the received electrical signal into a digital signal; and step 703, where a display 130 receives the digital signal obtained by the signal acquisition unit 120 and displays it accordingly. Furthermore, for any aspects not covered in the description of the landslide monitoring method, please refer to the relevant sections shown above; they will not be repeated here.

[0027] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0028] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk).

[0029] It should be noted that the various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For product-related embodiments, since they are similar to method-related embodiments, the descriptions are relatively simple, and relevant parts can be referred to the descriptions of the method-related embodiments.

[0030] It should also be noted that, in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the content of this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined in this application may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-powered displacement sensor, characterized in that, The self-powered displacement sensor is used to be buried in the mountain to monitor whether a landslide has occurred. When a landslide occurs in the mountain, the self-powered displacement sensor generates a corresponding electrical signal. The principle by which the self-powered displacement sensor generates a corresponding electrical signal when a landslide occurs in the mountain is the same as that of a triboelectric nanogenerator. The working mode of the triboelectric nanogenerator includes at least a single-electrode mode. When the principle by which the self-powered displacement sensor generates a corresponding electrical signal when a landslide occurs in the monitored mountain is consistent with that of the triboelectric nanogenerator in single-electrode mode, the self-powered displacement sensor includes: The main body is used to be buried within the mountain to be monitored; Multiple sensing units, each sensing unit including a first sensing element, a second sensing element, an inner magnetic element, and an outer magnetic element, wherein the first sensing element is disposed on the inner wall of the main body, one side of the second sensing element is in contact with the first sensing element and the inner magnetic element is bonded to the opposite side, and the outer magnetic element is disposed on the outer wall of the main body and corresponds to the inner magnetic element. When the monitored mountain does not experience a landslide, the magnetic attraction between the inner magnetic element and the outer magnetic element fixes the second sensing element relative to the first sensing element. When a landslide occurs in the monitored mountain, the soil and rocks generated by the landslide cause the outer magnetic element to slide. The sliding of the outer magnetic element causes the inner magnetic element to drive the second sensing element to slide synchronously relative to the first sensing element and generate a corresponding electrical signal. The first sensing element is conductive, and the triboeity difference between the first sensing element and the second sensing element is greater than a preset threshold. The first sensing element and the second sensing element serve as the friction layer of the self-powered displacement sensor. When the second sensing element slides relative to the first sensing element, a corresponding electrical signal is generated through the friction between the second sensing element and the first sensing element.

2. The self-powered displacement sensor according to claim 1, characterized in that, Both the inner magnetic attraction element and the outer magnetic attraction element are magnets.

3. The self-powered displacement sensor according to claim 1, characterized in that, The main body is a cylindrical tubular structure.

4. A landslide monitoring system, characterized in that, include: The self-powered displacement sensor according to any one of claims 1 to 3, wherein each of the self-powered displacement sensors is used to be buried at different locations within the mountain to be monitored; A signal acquisition device is electrically connected to each of the self-powered displacement sensors, and is used to receive the electrical signals generated by the self-powered displacement sensors at the corresponding positions when a landslide occurs in the monitored mountain, and convert the electrical signals into digital signals. A display, which is communicatively connected to the signal acquisition unit, is used to receive the digital signals and display them accordingly.

5. The landslide monitoring system according to claim 4, characterized in that, The signal acquisition device includes: A receiving unit is electrically connected to each of the self-powered displacement sensors and is used to receive electrical signals generated by the self-powered displacement sensors at the corresponding positions when a landslide occurs in the monitored mountain. An analog-to-digital conversion unit is used to perform analog-to-digital conversion on the electrical signal to obtain a corresponding digital signal; A communication unit is used to send the digital signal to the display.

6. A method for monitoring landslides, characterized in that, include: The self-powered displacement sensor according to any one of claims 1 to 3 generates a corresponding electrical signal when a landslide occurs in the monitored mountain; wherein the self-powered displacement sensor is embedded in the monitored mountain. The signal acquisition unit receives the electrical signal and converts it into a digital signal; The display receives the digital signal and displays it accordingly.

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