Laser measurement structure deformation monitoring device and monitoring method based on cobweb bionic structure

Abstract

The invention relates to the technical field of slope deformation monitoring, in particular to a laser measurement structure deformation monitoring device and monitoring method based on a cobweb bionic structure, and the laser measurement structure deformation monitoring device based on the cobweb bionic structure comprises a displacement measurement module, a data acquisition terminal and a displacement data analysis system. A data acquisition terminal is arranged at the center of a monitoring ring, the data acquisition terminal is connected with a plurality of displacement measurement modules through connecting lines, then a displacement data analysis system is connected with the data acquisition terminal through a connecting line, and data acquired by the displacement measurement modules are transmitted into a displacement data subsystem through the data acquisition terminal. The displacement data analysis system can analyze the data and judge whether the monitoring point where the displacement measurement module is located displaces or not, and therefore accurate early warning is conducted on geological disasters of the monitoring place.

Description

Technical Field

[0001] This invention relates to the field of slope deformation monitoring technology, specifically to a laser measurement device and monitoring method for structural deformation based on a spider web biomimetic structure. Background Technology

[0002] In geological disaster prevention and control, slope deformation monitoring is a key line of defense against disasters such as landslides and debris flows. With the acceleration of urbanization and the expansion of various infrastructures into complex geological areas, the requirements for the accuracy and timeliness of slope stability monitoring are becoming increasingly stringent.

[0003] Traditional slope deformation monitoring relies heavily on simple displacement sensors. These sensors have a narrow field of view, covering only a limited area, making it difficult to comprehensively monitor the overall slope dynamics. Furthermore, their accuracy is limited, often failing to detect minute changes in slope displacement. Simultaneously, traditional slope deformation monitoring systems lack environmental adaptability. In complex and varied geological conditions, such as steep slopes in mountainous areas, areas with mixed rock and soil compositions, or regions where geological structures are frequently altered by rainwater erosion and earthquakes, they often become rigid and unable to flexibly adjust monitoring strategies, leading to data inaccuracies or even data invalidation.

[0004] In the prior art, such as the Chinese patent with authorization announcement number CN218349435U, a slope monitoring device is disclosed. The published document uses a series of displacement sensors to monitor transverse cracks and slippage of the slope. However, when faced with the extremely subtle and gradual deformation of the slope in the early stage, it cannot accurately and timely capture the signal, thus missing the golden opportunity for disaster early warning. Summary of the Invention

[0005] This invention provides a laser measurement device and method for monitoring structural deformation based on a spider web biomimetic structure, in order to solve the problem that existing slope deformation monitoring systems cannot accurately and stably capture minute deformations of hillsides.

[0006] The present invention provides a laser measurement device and method for monitoring structural deformation based on a spider web biomimetic structure, which adopts the following technical solution:

[0007] A laser-based structural deformation monitoring device based on a spider web biomimetic structure includes a displacement measurement module, a data acquisition terminal, and a displacement data analysis system.

[0008] The displacement measurement module is configured in multiple ways, and multiple monitoring rings can be set at the monitoring site. The multiple monitoring rings are arranged concentrically, and multiple monitoring points are set on each monitoring ring. Each monitoring point is equipped with one displacement measurement module. A connecting line is connected between any two adjacent displacement measurement modules, and the connecting line is capable of transmitting data. The data acquisition terminal is used to collect the monitoring data of the multiple displacement measurement modules. Each displacement measurement module is connected to the data acquisition terminal by the connecting line. The displacement data analysis system is used to analyze the data collected by the data acquisition terminal. The data acquisition terminal and the displacement data analysis system are connected through the connecting line.

[0009] Furthermore, the data acquisition terminal is located at the center of multiple monitoring rings; a monitoring point on one of the monitoring rings and a monitoring point on an adjacent monitoring ring are simultaneously located on a radial line of the monitoring ring.

[0010] Furthermore, the connecting line includes a cable and a steel cable, the cable and the steel cable being of equal length.

[0011] Furthermore, each displacement measurement module includes a laser rangefinder and a reference object. The laser rangefinder is fixedly installed at the monitoring point, and there is a preset distance between the reference object and the laser rangefinder. The reference object is fixedly installed on the monitoring ground.

[0012] Furthermore, the data acquisition terminal has a storage capacity of at least 500 gigabytes and a processing speed of at least 1,000 times per second.

[0013] Furthermore, the displacement data analysis system has an analysis algorithm that can process at least 1,000 sets of data per minute.

[0014] Furthermore, the laser rangefinder has a measurement accuracy error of 0.1 mm, a response speed of 0.1 seconds, and a measurement range of 0.1 meters to 100 meters.

[0015] Furthermore, it also includes a control module, which is used to control the frequency at which the laser rangefinder collects data.

[0016] Furthermore, it also includes an alarm device, which is used to issue a warning signal when the displacement change between two adjacent monitoring points exceeds 0.5 mm, or when the displacement change of the same node exceeds 1 mm within a continuous monitoring time.

[0017] A laser-based structural deformation monitoring method based on a spider web biomimetic structure, utilizing the aforementioned laser-based structural deformation monitoring device based on a spider web biomimetic structure, includes the following steps:

[0018] S1, Select the monitoring location, set up multiple monitoring rings on the monitoring location, and set up multiple displacement measurement modules on each monitoring ring;

[0019] S2, the data acquisition terminal is set at the center of the monitoring ring, and each displacement measurement module is connected to the data acquisition terminal;

[0020] S3, The displacement data analysis system is used to analyze the data collected by the data acquisition terminal.

[0021] The beneficial effects of this invention are as follows: This invention provides a laser-based structural deformation monitoring device and method based on a spiderweb biomimetic structure. The device includes a displacement measurement module, a data acquisition terminal, and a displacement data analysis system. When monitoring slope deformation is required, a monitoring site is first selected on the slope, and a monitoring ring is set at the site. The number of monitoring rings is determined according to the area of ​​the site, and multiple monitoring rings are set concentrically. Multiple monitoring points are set on each monitoring ring, and a displacement measurement module is set at each monitoring point. Any two displacement measurement modules are connected by a connecting line. A data acquisition terminal is set at the center of the monitoring ring, and the data acquisition terminal is connected to multiple displacement measurement modules by a connecting line. Subsequently, the displacement data analysis system is connected to the data acquisition terminal through the connecting line. The data collected by the displacement measurement module is transmitted to the displacement data subsystem through the data acquisition terminal. The displacement data analysis system can analyze the data and determine whether displacement has occurred at the monitoring point where the displacement measurement module is located, thereby providing accurate early warning of geological disasters at the monitoring site. Attached Figure Description

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

[0023] Figure 1 A simplified structural diagram of a laser measurement and structural deformation monitoring device based on a spider web biomimetic structure provided in an embodiment of the present invention;

[0024] Figure 2A simplified structural diagram of the connecting line in a laser measurement and structural deformation monitoring device based on a spider web biomimetic structure provided in an embodiment of the present invention;

[0025] Figure 3 A simplified structural diagram of the displacement measurement module in a laser measurement structure deformation monitoring device based on a spider web biomimetic structure, provided as an embodiment of the present invention.

[0026] In the diagram: 110, monitoring point; 120, connecting line; 121, cable; 122, steel cable; 130, displacement data analysis system; 140, data acquisition terminal; 150, laser rangefinder; 160, fixing plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] like Figures 1 to 3As shown in the figure, an embodiment of the present invention provides a laser measurement device for structural deformation monitoring based on a spider web biomimetic structure, which includes a displacement measurement module, a data acquisition terminal 140 and a displacement data analysis system 130.

[0031] Multiple displacement measurement modules are configured, and multiple monitoring rings can be set at the monitoring site. These monitoring rings are concentrically arranged, and each monitoring ring has multiple monitoring points 110. Each monitoring point 110 has one displacement measurement module, which can be fixed to the monitoring point 110. In two adjacent monitoring rings, a displacement measurement module on one ring and a displacement measurement module on the adjacent ring are on the same radial line of the monitoring ring. On the same monitoring ring, adjacent displacement measurement modules are connected by a connecting line 120, which can transmit data. The displacement measurement module can obtain the distance between the monitoring point 110 and a preset point. In this embodiment, the displacement measurement module is a laser rangefinder 150, which is fixedly set at the monitoring point 110. Multiple preset points are set at the monitoring site, each corresponding to a monitoring point 110. The laser rangefinder 150 can detect the distance between the preset point and the monitoring point 110.

[0032] The data acquisition terminal 140 is used to collect monitoring data from multiple displacement measurement modules. The data acquisition terminal 140 has strong data processing and storage capabilities, and can quickly process monitoring data from multiple displacement measurement modules. To ensure that the data collected by the displacement measurement modules can be successfully transmitted to the data acquisition terminal 140, a connecting cable 120 is provided between each displacement measurement module and the data acquisition terminal 140. The connecting cable 120 can transmit data, thereby ensuring that the data from the displacement measurement modules can be successfully transmitted to the data acquisition terminal 140.

[0033] The displacement data analysis system 130 is used to analyze the data collected by the data acquisition terminal 140. Specifically, the displacement data analysis system 130 is set outside the monitoring ring. The displacement data analysis system 130 is connected to the data acquisition terminal 140 through the connecting line 120. The displacement data analysis system 130 can analyze the data collected by the data acquisition terminal 140 and can determine whether the slope of the monitoring site has deformed based on the analyzed data.

[0034] This invention discloses a laser-based structural deformation monitoring device based on a spiderweb biomimetic structure. When monitoring slope deformation is required, a monitoring site is first selected on the slope, and monitoring rings are set at the monitoring site. The number of monitoring rings is determined according to the area of ​​the monitoring site, and multiple monitoring rings are set concentrically. Multiple monitoring points 110 are set on each monitoring ring, and a displacement measurement module is set on each monitoring point 110. Any two displacement measurement modules are connected by a connecting line 120. A data acquisition terminal 140 is set at the center of the monitoring ring, and the data acquisition terminal 140 is connected to the multiple displacement measurement modules by the connecting line 120. Subsequently, a displacement data analysis system 130 is connected to the data acquisition terminal 140 through the connecting line 120. The data collected by the displacement measurement modules is transmitted to the displacement data subsystem through the data acquisition terminal 140. The displacement data analysis system 130 can analyze the data and determine whether the monitoring point 110 where the displacement measurement module is located has displaced, thereby providing accurate early warning of geological disasters in the monitoring site.

[0035] In one embodiment, the setting of monitoring point 110 needs to be determined according to the actual situation of the monitoring site. Specifically, the distance between two adjacent monitoring points 110 is usually set to 5 to 10 meters. For example, when the monitoring site is a conventional slope, the distance between two adjacent monitoring points 110 is set to 8 meters, and when the monitoring site is a slope with complex terrain, the distance between two adjacent monitoring points 110 is set to 5 meters.

[0036] In one embodiment, the data acquisition terminal 140 is located at the center of multiple monitoring rings. To reduce data transmission latency, the data acquisition terminal 140 is located at the center of the monitoring ring. In two adjacent monitoring rings, a monitoring point 110 on one monitoring ring and a monitoring point 110 on the adjacent monitoring ring are simultaneously located on the same radial line of the monitoring ring. When multiple monitoring rings and multiple monitoring points 110 are set, and multiple monitoring points 110 in the same monitoring ring are connected sequentially, the monitoring points 110 on the multiple monitoring rings form a spider web-like structure. The data acquisition terminal 140 is the "spider" at the center of the spider web, and the data from any displacement measurement module can be transmitted to the data acquisition terminal 140 in a timely manner.

[0037] In one embodiment, the connecting line 120 includes a cable 121 and a steel cable 122, which are of equal length. The cable 121 and the steel cable 122 are fixedly connected. Specifically, the steel cable 122 is inserted inside the cable 121. The steel cable 122 does not affect the conductivity and data transmission function of the cable 121. Between the displacement measurement module and the data acquisition terminal 140, the cable 121 is used for power supply and data transmission, and the steel cable 122 is used to improve the strength of the cable and reduce the probability of cable breakage.

[0038] In one embodiment, each displacement measurement module includes a laser rangefinder 150 and a reference object. The laser rangefinder 150 is fixedly installed at monitoring point 110 using expansion bolts. Specifically, an anchor point is drilled at monitoring point 110, and then expansion bolts are used to fix the laser rangefinder 150 to monitoring point 110, improving the stability of the laser rangefinder 150 during monitoring. In this embodiment, the reference object is a fixed plate 160, which is set at any position on the slope. The laser emitted by the laser rangefinder 150 can illuminate the fixed plate 160, at which point the laser rangefinder 150 can transmit the signal to the data acquisition terminal 140. Furthermore, after the reference object is set at the monitoring site, there is a preset distance between the reference object and the laser rangefinder 150, which facilitates the displacement data analysis system 130 to analyze the data.

[0039] In one embodiment, the data acquisition terminal 140 has a storage capacity of at least 500 gigabytes and a processing speed of at least 1000 times per second. All data from multiple laser rangefinders 150 is transmitted to the data acquisition terminal 140. To ensure that the data acquisition terminal 140 can store the data from multiple laser rangefinders 150, its storage capacity is set to 500 gigabytes or more. Since the data acquisition terminal 140 needs to receive data from multiple laser rangefinders 150 in a timely manner, to ensure that the data storage speed of the data acquisition terminal 140 is fast enough, its processing speed is set to 1000 times per second or more to avoid any lag or stuttering.

[0040] In one embodiment, the displacement data analysis system 130 includes an analysis algorithm capable of processing at least 1000 sets of data per minute. After data is transmitted to the displacement data analysis system 130, the algorithm performs calculations based on the data, determining whether the distance between the laser rangefinder 150 and the reference object has changed. The analysis algorithm primarily utilizes radio wave frequencies to amplitude modulate the laser beam and measures the phase delay generated by the modulated light traveling back and forth between the laser rangefinder 150 and the reference object. Then, based on the wavelength of the modulated light, it calculates the distance represented by this phase delay, determining the time required for the light to travel back and forth between the laser rangefinder 150 and the reference object. Specifically, it involves: D = c*t / 2, t = φ / ω, ΔN = φ / ω. D can be expressed as D = c*t / 2 = 1 / 2(c*φ / ω) = c / 4πf(Nπ+Δφ) = c / 4f(N+ΔN) = U(N+), where φ is the total phase delay of the laser signal traveling back and forth between the laser rangefinder 150 and the reference object, ω is the modulation light angular frequency, D is the distance between the laser rangefinder 150 and the reference object, c is the speed of light in the atmosphere, t is the time required for the light to travel back and forth between the laser rangefinder 150 and the reference object; ω = 2πf, f is the frequency of the laser beam; U is the unit length, and the value of U is equal to 1 / 4 of the modulation wavelength. N represents the number of half-wavelengths of modulation between the laser rangefinder 150 and the reference object; Δφ represents the portion of the phase delay less than π generated during a single round trip between the laser rangefinder 150 and the reference object; ΔN represents the fractional part of the modulation wave less than half a wavelength between the laser rangefinder 150 and the reference object. Under given modulation and standard atmospheric conditions, the frequency c / (4πf) is a constant. At this time, the distance measurement becomes the measurement of the number of half-wavelengths between the laser rangefinder 150 and the reference object and the measurement of the fractional part less than half a wavelength, i.e., measuring N or φ. The measurement of φ in the laser rangefinder 150 achieves very high accuracy, thus achieving the effect of fast and high-precision measurement.

[0041] In one embodiment, the laser rangefinder 150 has a measurement accuracy error of 0.1 mm, a response speed of 0.1 seconds, and a measurement range of 0.1 meters to 100 meters. By limiting the laser rangefinder 150, the accuracy of measuring the distance between the laser rangefinder 150 and the reference object is improved.

[0042] In one embodiment, a laser measurement structure deformation monitoring device based on a spider web biomimetic structure further includes a control module. The control module is used to control the frequency of data acquisition by the laser rangefinder 150. The laser rangefinder 150 can acquire data once per minute, once every 3 minutes, or once every 5 minutes. The control module can adjust the frequency of data acquisition by the laser rangefinder 150 according to the distance between two adjacent monitoring points 110. When the distance between two adjacent monitoring points 110 is 5 meters, the control module controls the laser rangefinder 150 to acquire data once per minute. When the distance between two adjacent monitoring points 110 is 10 meters, the control module controls the laser rangefinder 150 to acquire data once every 5 minutes.

[0043] In one embodiment, a laser-based structural deformation monitoring device based on a spiderweb biomimetic structure further includes an alarm device. The alarm device issues a warning signal when the displacement change between two adjacent monitoring points 110 exceeds 0.5 mm, or when the displacement change at the same node exceeds 1 mm within a continuous monitoring period. The warning signal issued by the alarm device includes, but is not limited to, an alarm bell. Workers can then reinforce the slope based on the warning signal and implement measures such as setting up isolation zones at the slope's edge.

[0044] In one embodiment, the displacement measurement module is a fiber optic sensor. The fiber optic sensor uses fiber optic grating technology and features high measurement accuracy, strong resistance to electromagnetic interference, and the ability to operate in harsh environments, facilitating construction operations. Each fiber optic sensor can operate independently without affecting the others. The steel cable 122 in the connecting line 120 is connected to the fiber optic sensor to prevent damage to the cable 121 when the slope shifts.

[0045] In one embodiment, the displacement measurement module is a wireless sensor. The wireless sensor utilizes microelectromechanical systems (MEMS) technology and is characterized by its small size, low power consumption, and ease of deployment, making it convenient for construction operations. If the slope is displaced, the wireless sensor will not be affected by the slope, reducing the probability of damage to the displacement measurement module.

[0046] A laser-based method for monitoring structural deformation using a spider web-inspired biomimetic structure, comprising the following steps:

[0047] S1. Select a monitoring location, set up multiple monitoring rings on the monitoring location, and set up multiple displacement measurement modules on each monitoring ring. The multiple displacement measurement modules are fixedly set at monitoring point 110 to improve the stability of the displacement measurement modules during operation.

[0048] S2, the data acquisition terminal 140 is set at the center of the monitoring ring, and each displacement measurement module is connected to the data acquisition terminal 140. In order to reduce the data transmission delay, the data acquisition terminal 140 is set at the center of the monitoring ring. In two adjacent monitoring rings, when multiple monitoring rings and multiple monitoring points 110 are set, and multiple monitoring points 110 in the same monitoring ring are connected in sequence, the monitoring points 110 on multiple monitoring rings form a spider web-like structure. The data acquisition terminal 140 is the "spider" at the center of the spider web, and the data of any displacement measurement module can be transmitted to the data acquisition terminal 140 in a timely manner.

[0049] S3, the displacement data analysis system 130 analyzes the data collected by the data acquisition terminal 140. The displacement data analysis system 130 can determine whether the slope of the monitored area has deformed based on the analyzed data.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser-based structural deformation monitoring device based on a spiderweb biomimetic structure, characterized in that, include: The system includes multiple displacement measurement modules, and multiple monitoring rings can be set at the monitoring location. The multiple monitoring rings are arranged concentrically, and multiple monitoring points are set on each monitoring ring. Each monitoring point is equipped with one displacement measurement module. A connecting line connects any two adjacent displacement measurement modules, and the connecting line is capable of transmitting data. A data acquisition terminal is provided, which is used to collect monitoring data from multiple displacement measurement modules; each displacement measurement module is connected to the data acquisition terminal by a connecting line. A displacement data analysis system is used to analyze the data collected by the data acquisition terminal; the data acquisition terminal and the displacement data analysis system are connected via the connecting cable.

2. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: The data acquisition terminal is located at the center of multiple monitoring rings; a monitoring point on one of the monitoring rings and a monitoring point on an adjacent monitoring ring are simultaneously located on a radial line of the monitoring ring.

3. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: The connecting line includes a cable and a steel cable, the cable and the steel cable being of equal length.

4. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: Each displacement measurement module includes a laser rangefinder and a reference object. The laser rangefinder is fixedly installed at the monitoring point, and there is a preset distance between the reference object and the laser rangefinder. The reference object is fixedly installed on the monitoring ground.

5. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: The data acquisition terminal has a storage capacity of at least 500 gigabytes and a processing speed of at least 1,000 times per second.

6. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: The displacement data analysis system has an analysis algorithm that can process at least 1,000 sets of data per minute.

7. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 4, characterized in that: The laser rangefinder has a measurement accuracy error of 0.1 mm, a response speed of 0.1 seconds, and a measurement range of 0.1 meters to 100 meters.

8. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 7, characterized in that: It also includes a control module, which is used to control the frequency at which the laser rangefinder collects data.

9. The laser measurement and structural deformation monitoring device based on a spider web biomimetic structure according to claim 1, characterized in that: It also includes an alarm device, which is used to issue a warning signal when the displacement change between two adjacent monitoring points exceeds 0.5 mm, or when the displacement change of the same node exceeds 1 mm within a continuous monitoring time.

10. A laser-based structural deformation monitoring method based on a spiderweb biomimetic structure, utilizing the laser-based structural deformation monitoring device based on a spiderweb biomimetic structure as described in any one of claims 1-9, characterized in that... Includes the following steps: S1, Select the monitoring location, set up multiple monitoring rings on the monitoring location, and set up multiple displacement measurement modules on each monitoring ring; S2, the data acquisition terminal is set at the center of the monitoring ring, and each displacement measurement module is connected to the data acquisition terminal; S3, The displacement data analysis system is used to analyze the data collected by the data acquisition terminal.

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