Slope multipoint video image displacement monitoring system and method

Abstract

The invention discloses a slope multipoint video image displacement monitoring system and method, and belongs to the technical field of slope monitoring, and the system comprises a passive reference target arranged at a stable position; the plurality of passive measuring point targets are arranged on the side slope; the light supplementing unit is used for irradiating light to the passive reference target and the passive measuring point target; and the multi-point image displacement measuring instrument is used for measuring the displacement of the passive measuring point target relative to the passive reference target so as to monitor the side slope. The non-contact passive target is adopted, wiring is avoided, installation is convenient, cost is low, and high-precision displacement measurement and monitoring can be simply and efficiently achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of slope monitoring, and more specifically, to a slope multi-point video image displacement monitoring system and method. Background Art

[0002] In areas with complex topography, slope disasters are prone to occur. In order to understand the changes and potential risks of slopes in a timely manner, long-term monitoring of slopes is required. Existing slope monitoring methods mainly include total station monitoring, GPS positioning monitoring, and lidar monitoring. Total station monitoring requires manual measurement, which is expensive and not conducive to large-scale use; GPS positioning monitoring can be used on a large scale, but has high requirements for network signals and is not applicable to remote areas or places with poor signals; the monitoring range and accuracy of lidar are easily affected by light conditions such as beam energy and beam size, and its applicability is not strong.

[0003] Based on the existing technologies, it can be seen that there is currently a lack of a slope displacement monitoring method and system that has a wide range of applications and can perform real-time monitoring around the clock. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a slope multi-point image displacement monitoring system, which has a wide range of applications and can be used for real-time monitoring around the clock, thereby solving the problems of high unit price, susceptibility to light factors, and low applicability of existing slope total station monitoring, GPS positioning monitoring, and lidar monitoring.

[0005] In order to achieve these objectives of the present invention, the present invention provides a slope multi-point video image displacement monitoring system, comprising: A passive reference target arranged in a stable position; Several passive measuring point targets arranged on the slope; A fill light unit, irradiating light to the passive reference target and the passive measuring point target; A multi-point image displacement measuring instrument measures the displacement of the passive measuring point target relative to the passive reference target to monitor the slope.

[0006] In the above technical solution, a non-contact passive target is used, which is wiring-free, easy to install, and low-cost. The displacement of the passive measuring point target relative to the passive reference target is directly measured using a multi-point image displacement measuring instrument, so that high-precision displacement measurement and monitoring can be simply and efficiently achieved.

[0007] Preferably, the passive measuring point target comprises: a base, which is embedded in the slope; a vertical pole, which is fixed to the base and extends upwardly from the slope; A first target body, which is fixed on the vertical pole; A second target body is arranged in a manner of moving up and down; A rope body connected to the second target body and extending along the slope, and pulled the second target body to move under the action of the slope movement; The multi-point image displacement measuring instrument measures the displacement of the second target body relative to the first target body or the passive reference target to monitor the slope.

[0008] In the above scheme, two target bodies are set on a passive measuring point target. The second target body can move up and down relative to the first target body. The rope body is arranged along the surface or inside of the slope (preferably inside) to form an inductive nerve of the slope activity. When the slope activity such as local settlement, cracking, and increase in the internal rock and soil gap occurs, the rope body is pulled by force to drive the second target body to move, and it can be monitored by the multi-point image displacement measuring instrument. The design of one rod and two targets reduces the number of targets, construction, and cost, while the design of the rope body increases the coverage of the target, and can capture the slope activity signals such as local settlement or cracking in advance, effectively, and accurately, and these signals are often the precursors of slope disasters.

[0009] More preferably, the rope body extends downwardly at an angle and has at least a horizontal and vertical span. The slope disaster is complex in form, and the rope body extending in an inclined manner in the horizontal and vertical directions can effectively sense signals of horizontal or vertical activities of the slope, especially signals of activities such as ground settlement, ground fissures, local sliding or sinking that cannot be covered or reflected by traditional targets, thereby increasing the coverage range.

[0010] More preferably, the rope is driven into the slope by drilling a hole with a drill; when drilling is inconvenient, the rope is laid along the surface or top layer of the slope, and a nail is connected to the end, and the nail is driven into the slope, so as to capture the slope activity signal.

[0011] More preferably, a limiter is provided to limit the movement of the second target body, and when the second target body overcomes the limitation of the limiter or destroys the limiter, it can move up and down along the vertical pole. More preferably, the limiter has a preset breaking stress, such as the limiter is a plastic block or a plastic belt or a metal wire, and the limiter is destroyed under the traction of the rope body. The design of the limiter can effectively filter invalid signals, such as touches such as fallen trees and rocks, and non-slope disaster activities such as accidental human contact.

[0012] Preferably, a plurality of the rope bodies are radiated around the passive measuring point target as the center to increase the coverage.

[0013] Preferably, when the displacement of the second target body relative to the first target body or the passive reference target exceeds a set threshold, the multi-point image displacement measuring instrument increases the displacement measurement frequency of the slope target.

[0014] For example, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, one week, one month, etc.; if the displacement of the second target body relative to the first target body measured by the multi-point image displacement measuring instrument (the displacement in the vertical direction, referred to as a) is greater than the set threshold A (for example, A=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), and the displacement of the first target body relative to the passive reference target (any displacement in the vertical or horizontal direction, referred to as b) is less than the set threshold B (for example, B=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it means that the position of the target base is relatively stable, but local settlement, cracking, increased internal rock and soil gaps and other slope activities occur within the range covered by the rope body, then an alarm is issued and the measurement frequency is increased.

[0015] Preferably, it also includes a solar power supply module, which supplies power to the slope multi-point image displacement monitoring system.

[0016] Preferably, it also includes a video monitoring module for performing video monitoring on the slope. More preferably, initially, the video monitoring module is in a standby state, and when the displacement exceeds a set threshold, the video monitoring module is awakened to collect video information of the slope.

[0017] Preferably, it also includes a rainfall detection unit and a temperature and humidity detection unit; when any one or more data indicators of rainfall or temperature and humidity exceed a set threshold, the displacement measurement frequency of the slope by the multi-point image displacement measuring instrument is increased.

[0018] Preferably, a control module is also included, which is connected with other module components of the slope multi-point video image displacement monitoring system to control the operation of other module components.

[0019] Preferably, it also includes a digital platform, which is communicatively connected to the slope multi-point video image displacement monitoring system.

[0020] Preferably, when the displacement exceeds a set threshold, the pictures taken by the multi-point image displacement measuring instrument and the videos taken by the video monitoring module are saved and uploaded to the digital platform.

[0021] The monitoring method of the slope multi-point video image displacement monitoring system provided by the present invention comprises: The passive measuring point target is constructed along the slope. The rope of the passive measuring point target is driven into the slope at an angle, or the rope is laid on the shallow layer or surface of the slope and then the end is connected with a nail and driven into the slope. Set up passive reference targets at locations with stable foundations on or off the slope; Setting the fill light unit toward the passive measuring point target and the passive reference target; A multi-point image displacement measuring instrument is set up to capture images and measure the displacement of the slope; when the displacement exceeds the set threshold, the displacement measurement frequency is increased.

[0022] Preferably, the displacement includes: the displacement of the passive measuring point target relative to the passive reference target and / or the displacement of the second target body relative to the first target body or the passive reference target.

[0023] Preferably, the rope body has multiple ropes, radiating in all directions with the passive measuring point target as the center.

[0024] Preferably, the slope site environment is monitored in real time through a rainfall detection unit and a temperature and humidity detection unit. When any one or more data indicators of rainfall or temperature and humidity exceed the set threshold, the displacement measurement frequency is increased, and the slope site is monitored by video through a video monitoring module. The displacement measurement data and video data are uploaded to a digital platform to facilitate remote monitoring.

[0025] The present invention has at least the following beneficial effects: 1. The present invention adopts a non-contact passive target, which is free of wiring, easy to install, and low in cost. The displacement of the passive measuring point target relative to the passive reference target can be directly measured using a multi-point image displacement measuring instrument to simply and efficiently achieve high-precision displacement measurement and monitoring.

[0026] 2. Aiming at the characteristics of slope disaster activities, the present invention designs a passive measuring point target. Two target bodies are set on one passive measuring point target. The second target body can move up and down relative to the first target body. The rope body is arranged along the surface or inside of the slope to form an inductive nerve of the slope activity. When local settlement, cracking, increase in internal rock and soil gaps and other slope activities occur, the rope body is forced to drive the second target body to move, and the displacement can be measured and monitored by a multi-point image displacement measuring instrument. The design of one rod and two targets reduces the number of targets, construction and cost, while the design of the rope body increases the coverage of the target and effectively, accurately and in advance captures slope activity signals such as local settlement or cracking.

[0027] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the side structure of the passive measuring point target of the present invention; Figure 2 This is a schematic diagram of the front structure of the passive measuring point target of the present invention; Figure 3 It is a schematic diagram of the arrangement structure of the slope multi-point video image displacement monitoring system of the present invention on the slope; Figure 4 This is a principle framework diagram of the slope multi-point video image displacement monitoring system of the present invention; Figure 5 This is a real-life layout diagram of the slope multi-point video image displacement monitoring system described in the present invention on the slope. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description.

[0030] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0031] like Figures 1 to 4 As shown, a slope multi-point video image displacement monitoring system of the present invention comprises: A passive reference target 20 arranged in a stable position; Figure 3 As shown, the passive reference target 20 is set on a stable foundation below the slope 1 to form a coordinate reference, providing a basis for accurate measurement of the displacement of the passive measuring point target 10.

[0032] Several passive measuring point targets 10 are arranged on the slope; Figure 3 As shown, several passive measuring point targets 10 are arranged on the slope to form a multi-measuring point layout, and each passive measuring point target 10 forms a sensing point, a measuring point. Preferably, the passive measuring point targets 10 are preferably arranged in an array, which can evenly cover the slope 1. Another preferred embodiment is that the passive measuring point targets 10 are set at key positions of the slope, such as potential sliding surfaces, crack development areas, settlement areas, etc. of the slope.

[0033] The fill light unit 30 irradiates light to the passive reference target and the passive measuring point target; the preferred fill light unit is an infrared fill light.

[0034] The multi-point image displacement measuring instrument 40 measures the displacement of the passive measuring point target 10 relative to the passive reference target 20 to monitor the slope. The multi-point image displacement measuring instrument 40 is a commonly used displacement measuring device. In this embodiment, the multi-point image displacement measuring instrument 40 captures the target image, takes the passive reference target as the coordinate reference, calculates the displacement of other measuring point targets, and realizes high-precision displacement measurement and monitoring.

[0035] The advantages of this implementation are that one camera can monitor multiple targets at the same time, realizing a one-to-many measurement point layout; a non-contact passive target is used, which is wiring-free, easy to install, and low-cost; a multi-point image displacement measuring instrument is directly used to measure the displacement of the passive measurement point target relative to the passive reference target, thereby realizing high-precision displacement measurement and monitoring in a simple and efficient manner.

[0036] Furthermore, since slope hazards are complex and diverse, both overall and local, and the coverage of a single target is limited, if the coverage is increased by increasing the number, not only the construction workload is large but also the cost is high. Therefore, this embodiment provides a passive measurement point target, such as Figures 1 to 3 As shown, it includes: The base 109 is embedded in the slope 1; preferably, the base is a common ground cage. After digging a hole on the slope, the base is inserted and then backfilled or poured to install and fix the target on the slope.

[0037] The vertical pole 104 is fixed on the base 109 and extends upward from the slope 1; preferably, Figure 1 As shown, the vertical pole is fixed to the base 109 by bolts or welding, and the lower end of the vertical pole is inserted into the base 109 and buried in the slope 1 together.

[0038] The first target body 106 is fixed on the vertical pole 104; in the figure, the first target body 106 is fixed on the vertical pole by a sleeve 105 or a clamp. When the vertical pole 104 slides along the slope or the vertical pole topples, the first target body 106 generates a two-dimensional (horizontal and vertical) displacement and is monitored by the multi-point image displacement measuring instrument 40.

[0039] The second target body 101 is disposed on the vertical pole 104 in a movable manner; in the example, the second target body 101 is located above the first target body 106, and can also be disposed below the first target body 106 in a movable manner. Figure 1 As shown, the vertical rod 104 is a hollow tube, a sliding rod 102 is sleeved on the top of the vertical rod 104 , and the second target body 101 is fixed on the sliding rod 102 .

[0040] The rope 108 has a first end connected to the second target 101, and a second end extending along the slope, and is pulled by the movement of the slope to pull the second target 101 to move; in the example, the rope 108 is connected to the second target 101 through a slide bar, and when the rope is pulled, the slide bar 102 drives the second target 101 to move. Figure 1 and 2 As shown, a hole 107 is provided in the middle and lower part of the vertical pole 104, and the rope body is passed through the interior of the vertical pole 104 and out of the hole 107, and then extends along the slope 1, and the rope body 108 can move without being fixed by the base 109. Preferably, the rope body is selected from steel wire rope or other smooth corrosion-resistant ropes, and the rope diameter is 2-40 mm.

[0041] like Figure 3As shown, the multi-point image displacement measuring instrument 40 monitors the slope by measuring the displacement of the second target body 101 relative to the first target body 106 or the passive reference target 20. Preferably, the displacement of the second target body 101 can be used as a signal for monitoring slope activities such as local settlement, cracking, and increase in internal rock-soil gaps.

[0042] In this embodiment, two target bodies are set on a passive measuring point target. The second target body can move up and down relative to the first target body. The rope body is arranged along the surface or inside of the slope (preferably inside) to form an inductive nerve of the slope activity. When the slope activity such as local settlement, cracking, and increase in the internal rock and soil gap occurs, the rope body is pulled by force to drive the second target body to move, and it can be monitored by the multi-point image displacement measuring instrument. The design of one rod and two targets reduces the number of targets, construction, and cost, while the design of the rope body increases the coverage of the target, and can capture the slope activity signals such as local settlement or cracking in advance, effectively, and accurately, and these signals are often the precursors of slope disasters.

[0043] Further, in another embodiment, Figure 3 As shown, the rope body 108 extends downward at an angle and has at least a horizontal and vertical span, so that it can sense the horizontal and vertical activities of the slope structure. Taking the horizontal direction as an example, the slope activities caused by local settlement or cracks in the slope generate interference forces with the rope body, thereby driving the rope body to pull the second target body to move; taking the vertical direction as an example, the local sliding or dislocation of the slope generates interference forces with the rope body, thereby driving the second target body to move. Preferably, the horizontal span is equal to or close to the spacing between adjacent passive measuring point targets 10. For example, if the spacing is 5 meters, the horizontal span of the rope body is equal to 3~5 meters, so that the rope body 108 covers the spacing; the vertical span refers to the depth of the rope body extension, which is based on the key positions such as the potential sliding surface of the slope, the crack development area, and the settlement area. For example, the buried depth of the rope body in a certain soil slope is 1~5 meters.

[0044] In this embodiment, in view of the complex characteristics of slope disasters, the rope body is arranged to extend obliquely in the horizontal and vertical directions, which can effectively sense the signals of horizontal or vertical activities of the slope, especially the activity signals such as ground subsidence, ground fissures, local sliding or sinking that cannot be covered or reflected by traditional targets, thereby increasing the coverage range.

[0045] Further in another embodiment, Figure 3As shown, if the slope is convenient for drilling (such as a small anchor drilling rig), the rope body 108 is driven into the slope 1 through the drilling rig, and the end of the rope body is connected to the anchor head. After the anchor drilling rig drives the anchor head into the slope, it is left on the slope together with the rope body as an anchor point. When the slope moves, the rope body can be pulled to drive the second target body to move; when the drilling rig is inconvenient, the rope body 108 can be directly laid along the surface or surface layer of the slope 1, and the end is connected to a nail, and the nail is driven into the slope to form a force point, so as to capture the activity signal of the slope 1. More preferably, the rope body 108 is not only driven into the slope at an angle, but also arranged along the surface or surface layer of the slope, so as to capture the activity signals of different layers of the slope.

[0046] Further in another embodiment, Figure 1 and 2 As shown, a limiter 103 is provided to limit the movement of the second target body 101. When the second target body overcomes the limitation of the limiter or destroys the limiter, it can move up and down along the vertical pole. In the figure, the slide bar 102 is provided with a transverse through hole and a limiter 103 is provided across it to limit the slide bar from sliding downward and thus limit the downward movement of the second target body 101. More preferably, the limiter 103 has a preset breaking stress, such as the limiter 103 is a plastic block or a plastic belt or a plastic strip or a metal wire, etc. Under the traction of the rope body 108, the slide bar 102 is pulled downward to produce a shearing effect with the vertical pole 104 to destroy the limiter 103, so that the second target body can move downward. The design of the limiter 103 can effectively filter invalid signals, such as accidental slight touches such as fallen wood and rocks, or non-slope disaster activities such as human error.

[0047] Further in another embodiment, Figure 3 As shown, a plurality of rope bodies 108 are radiated around the passive measuring point target to increase the coverage.

[0048] Further in another embodiment, when the displacement of the second target body relative to the first target body or the passive reference target exceeds a set threshold, the multi-point image displacement measuring instrument increases the displacement measurement frequency of the slope target.

[0049] In a preferred embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, one week, one month, etc., if the displacement of the second target body 101 relative to the first target body 106 measured by the multi-point image displacement measuring instrument 40 (the displacement in the vertical direction, referred to as a) is greater than the set threshold value A (for example, A=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), and the displacement of the first target body 106 relative to the passive reference target 20 (any displacement in the vertical direction or horizontal direction, referred to as b) is less than the set threshold value B (such as B=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it means that the position of the target base is relatively stable, but local settlement, cracking, increased internal rock and soil gaps and other slope activities occur within the range covered by the rope body, and an alarm is issued at this time, and the measurement frequency is increased. (For example, the frequency is increased from 1 Hz to 10 Hz).

[0050] In a preferred embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, one week, one month, etc., if the displacement of the first target body 106 relative to the passive reference target 20 (either vertical or horizontal displacement, referred to as c) is greater than or equal to a set threshold C (such as C = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it means that the slope activity is strong and the risk of slope disaster is high, and an alarm is also issued, and the measurement frequency is increased. (For example, the frequency is increased from 1Hz to 10Hz) Further, in another embodiment, Figure 3 and 4 As shown, it also includes a solar power supply module 50, which provides power for the slope multi-point image displacement monitoring system. Figure 4 In the embodiment, the solar power supply module 50 constitutes a solar power supply system, which provides 12V DC power for other electrical components.

[0051] Further, in another embodiment, Figure 3 and 4 As shown, it also includes a video monitoring module 60 for video monitoring of the slope. More preferably, in the initial state, the video monitoring module is in a dormant standby state, and when the displacement exceeds a set threshold (such as 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), the video monitoring module is awakened to collect video information of the slope. The above displacement refers to the displacement of any first target body 106 or the second target body 106 relative to the passive reference target 20, or the relative displacement of the first target body 106 and the second target body 106.

[0052] Further, in another embodiment, Figure 4As shown, it also includes a rainfall detection unit 100 and a temperature and humidity detection unit 90; when any one or more data indicators of rainfall or temperature and humidity reach or exceed the set threshold, the displacement measurement frequency of the multi-point image displacement measuring instrument on the slope is increased. For example, when the 24-hour rainfall reaches the threshold of 25.0 mm, the temperature reaches 0°C or below or is greater than or equal to 38°C, and the relative humidity of the air reaches 80% or above, the measurement frequency of the multi-point image displacement measuring instrument is increased from the initial state of 1Hz to 10Hz.

[0053] like Figure 4 As shown, the video monitoring module 60, the rainfall detection unit 100, the temperature and humidity detection unit 90 and the storage hard disk constitute the auxiliary subsystem of the system of the present invention.

[0054] Further, in another embodiment, Figure 4 As shown, the control module 300 is also included, which is connected to other module components of the slope multi-point video image displacement monitoring system to control the operation of other module components. In the example, the control module 300 is set in the electrical box, and the electrical box is equipped with a lightning arrester, an air switch, a serial communication relay module, a 4G router with a built-in traffic card, a temperature sensor inside the electrical box, a cooling fan, etc.

[0055] The image displacement measuring instrument 40 , the fill light unit 30 , the video monitoring module 60 , the rainfall detection unit 100 , the temperature and humidity detection unit 90 , the solar power supply module 50 , the storage hard disk, etc. are all connected to the control module 300 .

[0056] The passive reference target, the passive measuring point target 10, the fill light unit 30, the image displacement measuring instrument 40, etc. constitute a video image displacement subsystem.

[0057] Furthermore, the control module 300 is connected to the system host computer 200, and the system host computer can display the real-time data curve of the measurement data captured by the multi-point image displacement measuring instrument and perform system settings, such as configuring the operation cycle of other components.

[0058] Further, in another embodiment, Figure 4 As shown, the control module 300 also includes a digital platform 80, which is connected to the slope multi-point video image displacement monitoring system. In the example, the control module 300 is provided with a 4G router as a communication module, and then communicates with the data platform 80.

[0059] Preferably, when the displacement exceeds a set threshold value (such as 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), the control module saves the image displacement data taken by the multi-point image displacement measuring instrument and the video taken by the video monitoring module, and uploads them to the digital platform. The above displacement refers to the displacement of any first target body 106 or the second target body 106 relative to the passive reference target 20, or the relative displacement of the first target body 106 and the second target body 106.

[0060] like Figure 3 and Figure 5 As shown, a monitoring method of the slope multi-point video image displacement monitoring system of the present invention comprises: like Figure 3 As shown, the passive measuring point target 10 is constructed along the slope 1, and the rope body of the passive measuring point target is obliquely driven into the slope, or the rope body 108 is laid on the shallow layer or surface of the slope and then the end is connected with a nail and driven into the slope, or both are set.

[0061] A passive reference target 20 is set at a stable position on the slope 1 or outside the slope; Setting the fill light unit 30 toward the passive measuring point target and the passive reference target; A multi-point image displacement measuring instrument 40 is provided to take images of the slope and measure the displacement of the target; like Figure 3 and 5 As shown, a plurality of passive measuring point targets 10 and passive reference targets 20 are captured and imaged within the shooting field of view of the multi-point image displacement measuring instrument 40; When the displacement exceeds the set threshold, the displacement measurement frequency is increased. The multi-point image displacement measuring instrument 40 can use existing equipment, such as the AGI-IDM multi-point image displacement monitoring system, which has a non-contact measurement accuracy of 0.1mm and supports multi-point simultaneous monitoring. The multi-point image displacement measuring instrument 40 captures several passive measuring point targets 10 and passive reference targets 20 within the slope range.

[0062] The displacement includes: the displacement (vertical or horizontal) of the first target body 106 relative to the passive reference target 20 , and the displacement (vertical or horizontal) of the second target body 101 relative to the first target body 106 or the passive reference target 20 .

[0063] In one embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, one week, one month, etc.; if the displacement of the second target body 101 relative to the first target body 106 measured by the multi-point image displacement measuring instrument 40 (the displacement in the vertical direction, referred to as a) is greater than the set threshold value A (for example, A=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), and the displacement of the second target body 101 relative to the passive reference target 20 (any displacement in the vertical or horizontal direction, referred to as b) is less than the set threshold value B (such as B=5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it means that the position of the target base is relatively stable, but local settlement, cracking, increased internal rock and soil gaps and other slope activities occur within the range covered by the rope body, and an alarm is issued at this time, and the measurement frequency is increased. (For example, the frequency is increased from 1Hz to 10Hz) like Figure 3 As shown, the rope bodies 108 have multiple ends, radiating around the passive measuring point target as the center, and part of the rope bodies 108 are arranged inside the slope, and part of them are arranged on the surface of the slope.

[0064] In one embodiment, the slope site environment is monitored in real time through the rainfall detection unit and the temperature and humidity detection unit. When any one or more data indicators of rainfall or temperature and humidity exceed the set threshold, the displacement measurement frequency is increased, and the slope site is monitored by video through the video monitoring module, and the displacement measurement data and video data are uploaded to the digital platform for remote monitoring. For example, when the 24-hour rainfall reaches a threshold of 25.0 mm, the temperature reaches 0°C or below or a threshold of 38°C or above, and the relative humidity of the air reaches 80% or above, the measurement frequency of the multi-point image displacement meter is increased from the initial 1Hz to 10Hz.

[0065] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. They can be applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized.

Claims

1. A slope multi-point video image displacement monitoring system, characterized in that: include: Passive reference targets arranged in stable positions; Several passive measuring point targets arranged on the slope; A fill light unit, irradiating light to the passive reference target and the passive measuring point target; A multi-point image displacement measuring instrument measures the displacement of the passive measuring point target relative to the passive reference target to monitor the slope.

2. The slope multi-point video image displacement monitoring system according to claim 1, characterized in that: The passive measuring point target comprises: a base, which is embedded in the slope; a vertical pole, which is fixed to the base and extends upwardly from the slope; A first target body, which is fixed on the vertical pole; A second target body is arranged in a manner of moving up and down; a rope body connected to the second target body and extending along the slope, and pulling the second target body to move under the action of the slope movement; The multi-point image displacement measuring instrument measures the displacement of the second target body relative to the first target body or the passive reference target to monitor the slope activity.

3. The slope multi-point video image displacement monitoring system according to claim 2, characterized in that: The rope body extends obliquely downward and has at least horizontal and vertical spans.

4. The slope multi-point video image displacement monitoring system according to claim 3, characterized in that: driving the rope body into the interior of the slope; And / or, the rope is laid along the surface or top layer of the slope, and nails are connected to the end, and the nails are driven into the slope, so as to capture the slope activity signal.

5. The slope multi-point video image displacement monitoring system according to claim 4, characterized in that: A plurality of rope bodies are radiated around the passive measuring point target as the center.

6. The slope multi-point video image displacement monitoring system according to claim 2 or 4, characterized in that: Within a set period, when the displacement of the second target body relative to the first target body or the passive reference target exceeds the set threshold A, and the displacement of the first target body relative to the passive reference target is less than the set threshold B, it indicates that the slope has local settlement, cracking, and increased internal rock and soil gaps, an alarm is issued, and the displacement measurement frequency of the slope target by the multi-point image displacement measuring instrument is increased.

7. The slope multi-point video image displacement monitoring system according to claim 2, characterized in that: A limiting piece is provided to limit the movement of the second target body. When the second target body overcomes the restriction of the limiting piece or destroys the limiting piece, it can move up and down along the vertical pole.

8. The slope multi-point video image displacement monitoring system according to claim 2, characterized in that: Also includes: Solar power supply module; Video monitoring module, used for video monitoring of the slope; A rainfall detection unit, used for detecting rainfall; Temperature and humidity detection unit, used to detect temperature and humidity; A control module connected to the modules and units; A digital platform, communicating with the control module; When any one or more of the data indicators of rainfall, temperature and humidity exceed the set threshold, the displacement measurement frequency of the slope by the multi-point image displacement measuring instrument is increased; When the displacement exceeds the set threshold, the data of the multi-point image displacement measuring instrument and the video captured by the video monitoring module are saved and uploaded to the digital platform.

9. A monitoring method for the slope multi-point video image displacement monitoring system according to claim 2, characterized in that: include: The passive measuring point target is constructed along the slope. The rope of the passive measuring point target is driven into the slope at an angle, or the rope is laid on the shallow layer or surface of the slope and then the end is connected with a nail and driven into the slope. Set up passive benchmark targets at locations with stable foundations on or outside the slope; Setting the fill light unit toward the passive measuring point target and the passive reference target; Set up a multi-point image displacement measuring instrument to monitor the slope; Among them, within the set period, when the displacement of the second target body relative to the first target body or the passive reference target exceeds the set threshold A, and the displacement of the first target body relative to the passive reference target is less than the set threshold B, it is prompted that the slope has local settlement, cracking, and increased internal rock and soil gaps. The slope activity is prompted, an alarm is issued, and the displacement measurement frequency of the slope target by the multi-point image displacement measuring instrument is increased.

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