Slope tiny deformation monitoring system and method based on wireless optical communication

Abstract

The invention discloses a side slope tiny deformation monitoring system and method based on wireless optical communication, and belongs to the technical field of side slope deformation detection.The side slope tiny deformation monitoring system comprises a power module, a shielding module, an optical signal coding module, a laser transmitting module, a laser receiving module, an optical signal decoding module and a wireless communication module; the micro deformation degree of the side slope is judged according to the optical signal receiving deviation degree of the laser transmitting module and the laser receiving module, micro deformation monitoring of the side slope is achieved, the monitoring result of the micro deformation of the side slope is uploaded to an external upper computer through the wireless communication module for data storage, and the shielding module is used for shielding the micro deformation of the side slope. The laser transmitting module and the laser receiving module are covered, and interference of the external environment on optical communication is reduced. According to the invention, based on wireless optical communication, the micro deformation monitoring result of the slope can be timely and directly sent to the upper computer for statistical storage, the data volume transmission pressure is small, the data processing is convenient, different deformation grades can be divided, and a manual inspection strategy is convenient to formulate.

Description

Technical Field

[0001] The invention belongs to the technical field of slope deformation detection, and in particular relates to a slope micro-deformation monitoring system and method based on wireless optical communication. Background Art

[0002] Highway slope disasters occur frequently, which brings great challenges to transportation safety and the protection of life and property. Therefore, the demand for highway slope stability monitoring is increasing day by day. The slight deformation of the slope is a hidden danger of slope instability. At present, highway slope deformation monitoring is mainly based on manual inspection. Relying on the naked eye observation of technicians, it can find the more obvious deformation of the slope, but it is difficult to find the slight deformation on the surface of the slope, and it is impossible to achieve real-time monitoring. In addition to manual inspection, automatic monitoring technology, such as radar measurement technology, three-dimensional laser scanning technology, and photogrammetry technology, is used to scan and collect data on the slope to obtain slight displacement and deformation, but a large amount of slope data will be collected, which has the problems of large data volume and complex data processing. It is difficult to achieve real-time monitoring in actual engineering, and the equipment requirements are high. At the same time, it is only for rock slopes. For slopes with vegetation, there are large errors in the monitoring results. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a slope micro-deformation monitoring system and method based on wireless optical communication, which solves the problems of difficulty in real-time automatic monitoring of existing slopes, the need to process a large amount of data and the high cost of detection equipment.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] On the one hand, a slope micro-deformation monitoring system based on wireless optical communication includes: a power supply module, a shielding module, an optical signal encoding module, a laser emitting module connected to the optical signal encoding module, a laser receiving module connected to the laser emitting module, an optical signal decoding module and a wireless communication module connected to the laser receiving module in sequence; the power supply module is respectively connected to the optical signal encoding module, the laser emitting module, the laser receiving module, the optical signal decoding module and the wireless communication module, and the shielding module covers the laser emitting module and the laser receiving module;

[0006] The optical signal encoding module is used to encode the initial digital signal into an optical signal and transmit it to the laser emission module;

[0007] The laser transmitting module is used to transmit the optical signal to the laser receiving module;

[0008] The laser receiving module is used to receive the optical signal emitted by the laser emitting module;

[0009] The optical signal decoding module is used to process the optical signal to obtain a decoded digital signal and transmit it to the wireless communication module;

[0010] The wireless communication module is used to transmit the decoded digital signal to an external host computer;

[0011] The power supply module is used to provide power to the optical signal encoding module, the optical signal decoding module and the wireless communication module;

[0012] The shielding module is used to provide a closed scene for the laser emitting module and the laser receiving module.

[0013] Furthermore: the content of the initial digital signal includes the serial number of the slope micro-deformation monitoring system based on wireless optical communication, the position of the slope where micro-deformation is detected, and the characteristic words of the slope micro-deformation.

[0014] The beneficial effect of the above further scheme is: based on optical communication technology, the number, position and characteristic words of small deformation of the slope are converted into optical signals through the optical signal encoding module. When the optical signal is received subsequently, the slope deformation detection results can be directly displayed intuitively without the need for data processing and judgment, thereby improving the detection efficiency and real-time detection.

[0015] Furthermore: the laser emitting module and the laser receiving module are both installed on the slope, and are kept straight and horizontal, and are separated by a preset distance.

[0016] The beneficial effect of the above further scheme is: keeping the laser transmitting module and the laser receiving module on the same horizontal line can ensure the accuracy of slope detection, and spacing them at a certain distance, while ensuring slope detection, reducing the impact of the external natural environment on optical communication transmission.

[0017] Further: the laser emission module adopts LG Laguerre Gaussian beam, and its expression in cylindrical coordinates is as follows:

[0018]

[0019] Where u(r,θ,z) is the expression for the offset of the LG Laguerre-Gaussian beam, r is the radial distance, θ is the azimuth angle, z is the optical axis propagation distance of the LG Laguerre-Gaussian beam, and z R is the Rayleigh length, C is the normalization constant, exp() is the exponential function, d is the offset distance of the LG Laguerre-Gaussian beam to the center of the receiving area, θ is the azimuth angle, ξ is the angle of the offset direction of the LG Laguerre-Gaussian beam, ω(z) is the beam waist radius of the LG Laguerre-Gaussian beam at distance z, i is the imaginary unit, and l is the orbital angular momentum quantum number of the LG Laguerre-Gaussian beam.

[0020] The beneficial effect of the above further scheme is: through the LG Laguerre Gaussian beam, efficient information transmission can be achieved. Through the above formula, the specific offset direction and distance of the LG Laguerre Gaussian beam in the optical signal receiving area can be calculated, which helps technicians to divide different areas in the optical signal receiving area and conduct specific analysis of slope micro-deformation monitoring.

[0021] Furthermore: the laser receiving module includes a circular optical signal receiving area, and the circular optical signal receiving area is divided into an inner circular optical signal receiving area and a plurality of circular ring optical signal receiving areas.

[0022] The beneficial effect of the above further scheme is: dividing the circular optical signal receiving area of ​​the laser receiving module into an inner circle optical signal receiving area and several circular ring optical signal receiving areas, which can reflect the degree of transmission deviation of the optical signal, and then judge the degree of slope deformation, facilitate the subsequent planning of manual inspection of the slope, improve the efficiency of manual inspection, and reduce labor costs.

[0023] Further: the area of ​​the inner circle optical signal receiving area and the area of ​​the circular ring optical signal receiving area are changed according to the requirements of monitoring the slight deformation of the slope;

[0024] After the inner circle optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the inner circle optical signal receiving area to obtain a decoded digital signal;

[0025] After the annular optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the annular optical signal receiving area to obtain a decoded digital signal.

[0026] The beneficial effect of the above further scheme is that by adding corresponding deformation levels to different optical signal receiving areas, the slope deformation monitoring results can be displayed intuitively without the need for complex data processing procedures, thereby ensuring real-time detection of slope deformation.

[0027] Furthermore: the deformation level is used to evaluate the deformation level of the current slope monitoring, and is sent to the host computer through the wireless communication module for data statistics and strategy formulation.

[0028] The beneficial effect of the above further solution is that the deformation level is sent to the host computer, which can intuitively display the deformation level of the slope, improve data processing efficiency and real-time feedback.

[0029] On the other hand, a method for monitoring small slope deformation based on wireless optical communication comprises the following steps:

[0030] S1: Install the laser transmitting module and the laser receiving module on the slope at a set distance and keep them straight and horizontal;

[0031] S2: using the optical signal encoding module to input the initial digital signal and encode it into an optical signal, sending the optical signal to the laser receiving module through the laser transmitting module, and obtaining the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module;

[0032] S3: according to the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module, use the optical signal decoding module to decode and generate a digital signal corresponding to the irradiation position, and obtain a decoded digital signal;

[0033] S4: Transmit the decoded digital signal to an external host computer through a wireless communication module;

[0034] S5: According to the external host computer, the decoded digital signal is recorded to complete the monitoring of small deformation of the slope.

[0035] The beneficial effects of the present invention are as follows: the present invention proposes a slope micro-deformation monitoring system based on wireless optical communication, which is arranged on a slope that requires micro-deformation detection. Through a laser transmitting module and a laser receiving module, real-time detection of micro-deformations of the slope can be achieved. Based on information transmission via optical communication, the micro-deformation monitoring results of the slope can be sent to a host computer for statistical storage in a timely and direct manner. The data transmission pressure is small and data processing is convenient. At the same time, the circular optical signal receiving area of ​​the laser receiving module can be divided into different deformation levels, and corresponding deformation levels can be given according to different degrees of slope deformation, which is convenient for subsequent planning of the priority of manual inspections of the slope, improves the efficiency of manual inspections, and reduces the labor cost of slope deformation detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a slope micro-deformation monitoring system based on wireless optical communication;

[0037] Figure 2 It is the circular optical signal receiving area of ​​the laser receiving module of the present invention. DETAILED DESCRIPTION

[0038] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0039] Example 1

[0040] like Figure 1 As shown, a slope micro-deformation monitoring system based on wireless optical communication includes: a power module, a shielding module, an optical signal encoding module, a laser emitting module connected to the optical signal encoding module, a laser receiving module connected to the laser emitting module, an optical signal decoding module and a wireless communication module connected to the laser receiving module in sequence; the power module is respectively connected to the optical signal encoding module, the laser emitting module, the laser receiving module, the optical signal decoding module and the wireless communication module, and the shielding module covers the laser emitting module and the laser transmitting module;

[0041] The optical signal encoding module is used to encode the initial digital signal into an optical signal and transmit it to the laser emission module;

[0042] A laser transmitting module, used for transmitting an optical signal to a laser receiving module;

[0043] A laser receiving module, used for receiving the optical signal emitted by the laser emitting module;

[0044] An optical signal decoding module is used to process the optical signal to obtain a decoded digital signal and transmit it to the wireless communication module;

[0045] A wireless communication module, used to transmit the decoded digital signal to an external host computer;

[0046] A power module, used to provide power to the optical signal encoding module, the optical signal decoding module and the wireless communication module;

[0047] The shielding module is used to provide a closed scene for the slope micro-deformation monitoring system based on wireless optical communication.

[0048] In one embodiment of the present invention, the content of the initial digital signal is manually input through the optical signal encoding module, the initial digital signal includes a character signal and an audio signal, and the content of the initial digital signal includes the number of the slope micro-deformation monitoring system based on wireless optical communication, the location of the slope where micro-deformation is detected, and the characteristic words of the slope micro-deformation; the specific information can be set to "device number 1, top of slope No. 1, whether there is micro-deformation", so that it can reflect the geographical location of the current slope micro-deformation detection, and the optical signal encoding module encodes the character signal and the audio signal into an optical signal, and transmits it to the laser emission module.

[0049] In one embodiment of the present invention, the slope micro-deformation monitoring system based on wireless optical communication of the present invention is installed in a slope area where micro-deformation monitoring is required, and the laser transmitting module and the laser receiving module are installed in a straight line and horizontally on the slope, separated by a preset distance, which can be set to 0.5m, so as to avoid the influence of the long propagation distance of the optical signal on the propagation of the optical signal and increase the influence of the surrounding environment of the slope, and ensure the accuracy of the slope micro-deformation monitoring; at the same time, according to different slope environments and slope installation positions, the distance between the laser transmitting module and the laser receiving module can be flexibly adjusted to obtain the best slope micro-deformation monitoring results.

[0050] In one embodiment of the present invention, Figure 2 As shown, the circular optical signal receiving area of ​​the laser receiving module of the present invention is divided into an inner circle optical signal receiving area and three annular optical signal receiving areas, wherein the deformation level of the inner circle optical signal receiving area is set to "normal", the first annular optical signal receiving area is adjacent to the inner circle optical signal receiving area, and the deformation level is set to "first-level deformation", the second annular optical signal receiving area is adjacent to the first annular optical signal receiving area, and the deformation level is set to "secondary deformation", and the third annular optical signal receiving area is adjacent to the second annular optical signal receiving area, and the deformation level is set to "third-level deformation"; after the inner circle optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the inner circle optical signal receiving area to obtain a decoded digital signal; after the annular optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the annular optical signal receiving area to obtain a decoded digital signal.

[0051] In one embodiment of the present invention, the laser emission module adopts LG Laguerre Gaussian beam, and its expression in cylindrical coordinates is as follows:

[0052]

[0053] Where u(r,θ,z) is the expression for the offset of the LG Laguerre-Gaussian beam, r is the radial distance, θ is the azimuth angle, z is the optical axis propagation distance of the LG Laguerre-Gaussian beam, and z R is the Rayleigh length, C is the normalization constant, exp() is the exponential function, d is the offset distance from the LG Laguerre-Gaussian beam to the center of the receiving area, θ is the azimuth angle, ξ is the angle of the offset direction of the LG Laguerre-Gaussian beam, ω(z) is the waist radius of the LG Laguerre-Gaussian beam at distance z, i is the imaginary unit, i 2=-1, l is the orbital angular momentum quantum number of the LG Laguerre-Gaussian beam; the specific offset distance from the beam to the center of the receiving area can be calculated through the expression, so as to divide the inner circle light signal receiving area and the annular ring light signal receiving area, thereby improving the rationality and credibility of the area division.

[0054] This embodiment uses three circular optical signal receiving areas for illustration, and the number can be selected according to the specific slope environment. The closer to the inner circular optical signal receiving area, the lower the deformation level, which means that the slope deformation is smaller than other areas. After the host computer receives the information, the priority of manual monitoring is lower; the farther away from the inner circular optical signal receiving area, the higher the deformation level, which means that the slope deformation is larger than other areas. After the host computer receives the information, the priority of manual monitoring is higher; when the laser receiving module does not receive the optical signal, the wireless communication module will not send any information, which means that the slope deformation is too large or the system is damaged. In an emergency situation, the host computer can find that the data transmission of the slope deformation monitoring here is missing, and the priority of manual monitoring is set to the highest; technicians can plan the order of actual slope deformation monitoring according to the priority, improve the efficiency of slope deformation detection, and reduce labor costs.

[0055] In one embodiment of the present invention, the area of ​​the inner circle optical signal receiving area and the area of ​​the annular optical signal receiving area are changed according to the needs of monitoring the slight deformation of the slope; the larger the inner circle optical signal receiving area, the stronger the anti-interference ability is when monitoring the slight deformation of the slope, and the smaller the inner circle optical signal receiving area, the more sensitive the displacement monitoring is when monitoring the slight deformation of the slope; when the slope to be detected is near the highway, the passing of vehicles will cause the vibration of the slope, and the area of ​​the inner circle optical signal receiving area can be appropriately increased to avoid false alarms of slight deformation of the slope; when the slope to be detected is in a relatively quiet area in the wild, the area of ​​the inner circle optical signal receiving area can be appropriately reduced to increase the sensitivity of the slight deformation of the slope.

[0056] In one embodiment of the present invention, the wireless communication module can transmit the decoded digital signal to an external host computer, and the host computer can receive multiple slope micro-deformation data, and perform statistics and storage; the power supply module can provide power for the slope micro-deformation monitoring system based on wireless optical communication of the present invention, and can select solar power generation, wind power generation, battery installation and other power supply methods to achieve long-term normal operation of the system. The specific power supply method is selected according to the environment and cost of the slope; the shielding module can provide a closed scene for the laser transmitting module and the laser receiving module to reduce the interference of the slope environment on optical communication, such as natural factors such as dust, raindrops, and sunlight, to avoid false alarms in slope micro-deformation detection. At the same time, the shielding module can change its shape and size according to the specific slope environment to ensure that the slope micro-deformation monitoring system based on wireless optical communication of the present invention can work normally in the slope environment.

[0057] The operation process of the present invention is described below:

[0058] The present invention is installed on a slope that needs to be deformed, and the laser receiving module and the laser transmitting module are kept opposite to each other and on the same horizontal line. When a slight deformation occurs on the slope, the positions of the laser transmitting module and the laser receiving module will be offset, resulting in an offset in the transmission of the optical signal. Through the offset distance of the optical signal, it can be inferred whether a slight deformation occurs on the slope; the initial digital signal to be encoded is input into the optical signal encoding module, so that it can intuitively reflect the measurement position and environment of the current slight deformation of the slope;

[0059] When the slope is normal, the laser transmitting module transmits an optical signal to the inner circle optical signal receiving area of ​​the circular optical signal receiving area. At this time, the optical signal is decoded, and the deformation level corresponding to the inner circle optical signal receiving area is added, and integrated to obtain a decoded digital signal, which is uploaded to the host computer through the wireless communication module; when the slope undergoes a slight deformation, the optical signal emitted by the laser transmitting module will shift from the inner circle optical signal receiving area of ​​the circular optical signal receiving area to the annular optical signal receiving area. At this time, the optical signal is decoded, and the deformation level corresponding to this annular optical signal receiving area is added, and integrated to obtain a decoded digital signal, which is uploaded to the host computer through the wireless communication module, which can make a preliminary division of the slope deformation; when the slope undergoes a large deformation, the circular optical signal receiving area cannot receive the optical signal. At this time, the wireless communication module will not send information to the host computer, and the host computer can set the priority of manual inspection of the slope here to the highest;

[0060] The host computer can simultaneously receive data uploaded by multiple slope micro-deformation monitoring systems, and obtain the priority of manual inspection of the slope according to the deformation level, which is convenient for technical personnel to plan manual inspections and realize real-time detection of micro-deformation of the slope.

[0061] The beneficial effects of the present invention are as follows: the present invention proposes a slope micro-deformation monitoring system based on wireless optical communication, which is arranged on a slope that requires micro-deformation detection. Through a laser transmitting module and a laser receiving module, real-time detection of micro-deformations of the slope can be achieved. Based on information transmission via optical communication, the micro-deformation monitoring results of the slope can be sent to a host computer for statistical storage in a timely and direct manner. The data transmission pressure is small and data processing is convenient. At the same time, the circular optical signal receiving area of ​​the laser receiving module can be divided into different deformation levels, and corresponding deformation levels can be given according to different degrees of slope deformation, which is convenient for subsequent planning of the priority of manual inspections of the slope, improves the efficiency of manual inspections, and reduces the labor cost of slope deformation detection.

[0062] Example 2

[0063] The present invention also provides a method for monitoring small slope deformation based on wireless optical communication, comprising the following steps:

[0064] S1: Install the laser transmitting module and the laser receiving module on the slope at a set distance and keep them straight and horizontal;

[0065] S2: using the optical signal encoding module to input the initial digital signal and encode it into an optical signal, sending the optical signal to the laser receiving module through the laser transmitting module, and obtaining the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module;

[0066] S3: according to the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module, use the optical signal decoding module to decode and generate a digital signal corresponding to the irradiation position, and obtain a decoded digital signal;

[0067] S4: Transmit the decoded digital signal to an external host computer through a wireless communication module;

[0068] S5: According to the external host computer, the decoded digital signal is recorded to complete the monitoring of small deformation of the slope.

[0069] In one embodiment of the present invention, a shielding module can be set according to the specific slope environment to protect the transmission of optical communication, prevent external natural light, dust, raindrops, etc. from interfering with the transmission of optical communication and generating erroneous monitoring results of slope micro-deformation; the present invention installs the laser transmitting module and the laser receiving module on the same slope, based on the linear transmission of the laser, through the offset of the laser, to achieve accurate monitoring of the slope micro-deformation, and adds optical communication technology to convert the slope micro-deformation monitoring results into direct classification results, which can directly display the slope micro-deformation monitoring results without data judgment and calculation, thereby improving data processing efficiency; at the same time, the optical signal receiving area of ​​the laser receiving module is divided into different areas, so that the degree of slope micro-deformation can be judged, which is convenient for planning on-site deformation monitoring strategies for manual inspections, improves manual monitoring efficiency, and reduces labor costs.

Claims

1. A slope micro-deformation monitoring system based on wireless optical communication, characterized in that: include: A power module, a shielding module, an optical signal encoding module, a laser emitting module connected to the optical signal encoding module, a laser receiving module connected to the laser emitting module, an optical signal decoding module and a wireless communication module connected to the laser receiving module in sequence; the power module is respectively connected to the optical signal encoding module, the laser emitting module, the laser receiving module, the optical signal decoding module and the wireless communication module, and the shielding module covers the laser emitting module and the laser receiving module; The optical signal encoding module is used to encode the initial digital signal into an optical signal and transmit it to the laser emission module; The laser transmitting module is used to be installed on the slope and transmit the optical signal in a straight line to the laser receiving module; The laser receiving module is used to be installed on the slope and receive the optical signal emitted linearly by the laser emitting module; The optical signal decoding module is used to process the optical signal to obtain a decoded digital signal and transmit it to the wireless communication module; The wireless communication module is used to transmit the decoded digital signal to an external host computer; The power supply module is used to provide power to the optical signal encoding module, the optical signal decoding module and the wireless communication module; The shielding module is used to provide a closed scene for the laser emitting module and the laser receiving module.

2. The slope micro-deformation monitoring system based on wireless optical communication according to claim 1 is characterized in that: The content of the initial digital signal includes the serial number of the slope micro-deformation monitoring system based on wireless optical communication, the position of the slope where micro-deformation is detected, and the characteristic words of the slope micro-deformation.

3. The slope micro-deformation monitoring system based on wireless optical communication according to claim 1 is characterized in that: The laser emitting module and the laser receiving module are both installed on the slope, kept straight and level, and separated by a preset distance.

4. The slope micro-deformation monitoring system based on wireless optical communication according to claim 1 is characterized in that: The laser emission module adopts LG Laguerre Gaussian beam, and its expression in cylindrical coordinates is as follows: Where u(r,θ,z) is the expression for the offset of the LG Laguerre-Gaussian beam, r is the radial distance, θ is the azimuth angle, z is the optical axis propagation distance of the LG Laguerre-Gaussian beam, and z R is the Rayleigh length, C is the normalization constant, exp() is the exponential function, d is the offset distance of the LG Laguerre-Gaussian beam to the center of the receiving area, θ is the azimuth angle, ξ is the angle of the offset direction of the LG Laguerre-Gaussian beam, ω(z) is the beam waist radius of the LG Laguerre-Gaussian beam at distance z, i is the imaginary unit, and l is the orbital angular momentum quantum number of the LG Laguerre-Gaussian beam.

5. The slope micro-deformation monitoring system based on wireless optical communication according to claim 1 is characterized in that: The laser receiving module comprises a circular optical signal receiving area, which is divided into an inner circular optical signal receiving area and a plurality of circular ring optical signal receiving areas.

6. The slope micro-deformation monitoring system based on wireless optical communication according to claim 5 is characterized in that: The area of ​​the inner circle optical signal receiving area and the area of ​​the circular ring optical signal receiving area are changed according to the needs of monitoring the slight deformation of the slope; After the inner circle optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the inner circle optical signal receiving area to obtain a decoded digital signal; After the annular optical signal receiving area receives the optical signal, the optical signal decoding module decodes the optical signal and adds the deformation level corresponding to the annular optical signal receiving area to obtain a decoded digital signal.

7. The slope micro-deformation monitoring system based on wireless optical communication according to claim 6 is characterized in that: The deformation level is used to evaluate the deformation level of the current slope monitoring and is sent to the host computer through the wireless communication module for data statistics and strategy formulation.

8. A method for monitoring small slope deformation based on wireless optical communication, characterized in that: The following steps are involved: S1: Install the laser transmitting module and the laser receiving module on the slope at a set distance and keep them straight and horizontal; S2: using the optical signal encoding module to input the initial digital signal and encode it into an optical signal, sending the optical signal to the laser receiving module through the laser transmitting module, and obtaining the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module; S3: according to the irradiation position of the optical signal on the optical signal receiving area of ​​the laser receiving module, use the optical signal decoding module to decode and generate a digital signal corresponding to the irradiation position, and obtain a decoded digital signal; S4: Transmit the decoded digital signal to an external host computer through a wireless communication module; S5: According to the external host computer, the decoded digital signal is recorded to complete the monitoring of small deformation of the slope.

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