Slope Multi-Point Video Image Displacement Monitoring System and Method

Abstract

The present invention discloses a multi-point video image displacement monitoring system and method for slopes, belonging to the technical field of slope monitoring. The system includes: a passive reference target arranged at a stable position; a plurality of passive measurement point targets arranged on the slope; a supplementary lighting unit for irradiating light onto the passive reference target and the passive measurement point targets; and a multi-point image displacement measuring instrument for measuring the displacement of the passive measurement point targets relative to the passive reference target to monitor the slope. The present invention adopts non-contact passive targets, eliminates the need for wiring, is convenient to install, has low cost, and can simply and efficiently achieve high-precision displacement measurement and monitoring.

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 and landforms, slope disasters are prone to occur. In order to timely understand the changes and potential risks of slopes, long-term monitoring of slopes is required. Existing slope monitoring methods mainly include total station monitoring, GPS positioning monitoring, lidar monitoring, etc. Total station monitoring requires manual measurement, has a high unit price, and is 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 in remote or poor-signal areas; the monitoring range and accuracy of lidar are easily affected by lighting conditions such as beam energy and beam size, and its applicability is not strong.

[0003] Based on the existing technology at hand, it can be seen that there is currently a lack of a slope displacement monitoring method and system with a wide range of applicability and capable of all-weather real-time monitoring. Summary of the Invention

[0004] In view of the above problems, the object of the present invention is to provide a slope multi-point image displacement monitoring system, which has the characteristics of wide applicability and all-weather real-time monitoring, and solves the problems of high unit price, easy influence by lighting factors, and low applicability range existing in existing slope total station monitoring, GPS positioning monitoring, lidar monitoring, etc.

[0005] To achieve these objects of the present invention, a slope multi-point video image displacement monitoring system provided by the present invention includes:

[0006] A passive reference target arranged at a stable position;

[0007] A number of passive measurement point targets arranged on the slope;

[0008] A supplementary lighting unit that irradiates light to the passive reference target and the passive measurement point targets;

[0009] A multi-point image displacement measuring instrument that measures the displacement of the passive measurement point targets relative to the passive reference target to monitor the slope.

[0010] In the above technical solution, non-contact passive targets are used, which are free of wiring, easy to install, have low costs, and can simply and efficiently achieve high-precision displacement measurement and monitoring by directly using the multi-point image displacement measuring instrument to measure the displacement of the passive measurement point targets relative to the passive reference target.

[0011] Preferably, the passive measurement point target includes:

[0012] A base that is buried in the slope;

[0013] A vertical pole, which is fixed on the base and extends upward out of the slope;

[0014] A first target body, which is fixed on the vertical pole;

[0015] A second target body, which is arranged in a vertically movable manner;

[0016] A rope body, which is connected to the second target body and extends along the slope, and the second target body is driven to move under the action of the slope movement;

[0017] 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.

[0018] In the above solution, two target bodies are arranged 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 on the surface or inside of the slope (preferably inside), forming the induction nerve of the slope movement. When slope movements such as local settlement, cracking, and increased internal rock and soil gaps occur, the rope body is stressed and drives the second target body to move, and can be monitored by the multi-point image displacement measuring instrument. The design of one pole with two targets reduces the number of targets, reduces construction, and reduces costs. The design of the rope body increases the coverage of the targets, and can capture local settlement or cracking and other slope movement signals in advance, effectively and accurately. And these signals are often the precursors of slope disasters.

[0019] More preferably, the rope body extends obliquely downward and has at least spans in the horizontal and vertical directions. The forms of slope disasters are complex. The oblique extension of the rope body in the horizontal and vertical directions can effectively sense the signals of slope horizontal or vertical movements, especially the movement signals that cannot be covered or reflected by traditional targets such as ground settlement, ground fissures, local sliding or subsidence, etc., increasing the coverage range.

[0020] More preferably, the rope body is driven into the slope interior through a drilling rig; when the construction of the drilling rig is inconvenient, the rope body is laid on the surface or the surface layer of the slope, and the end is connected to a nail, and the nail is driven into the slope to capture the slope movement signal in this way.

[0021] More preferably, a limiting member is provided to limit the movement of the second target body. When the second target body overcomes the limitation of the limiting member or damages the limiting member, it can move up and down along the vertical pole. More preferably, the limiting member has a preset breaking stress. For example, the limiting member is a plastic block, a plastic strip or a metal wire, and is damaged under the traction force of the rope body. The design of the limiting member can effectively filter out invalid signals, such as touches by fallen trees and fallen rocks, and non-slope disaster activities such as human accidental touches.

[0022] Preferably, a plurality of the rope bodies are radially arranged around the passive measuring point target to increase the coverage range.

[0023] Preferably, when the displacement of the second target body relative to the first target body or the passive reference target exceeds the set threshold, the multi-point image displacement measuring instrument increases the displacement measurement frequency of the slope target.

[0024] For example, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, 1 week, 1 month, etc.; if the multi-point image displacement measuring instrument measures that the displacement of the second target body relative to the first target body (the displacement in the vertical direction, abbreviated 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, abbreviated as b) is less than the set threshold B (such as B = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it indicates that the position where the target base is located is relatively stable, but local settlement, cracking, and increased internal rock and soil gaps occur within the range covered by the rope body, and at this time, an alarm is issued and the measurement frequency is increased.

[0025] Preferably, it further includes a solar power supply module, which supplies power to the slope multi-point image displacement monitoring system.

[0026] Preferably, it further includes a video monitoring module for video monitoring of the slope. More preferably, initially, the video monitoring module is in a standby state, and when the displacement exceeds the set threshold, the video monitoring module is awakened to collect video information of the slope.

[0027] Preferably, it further includes a rainfall detection unit and a temperature and humidity detection unit; when any one or more of the rainfall or temperature and humidity data indicators exceed the set threshold, the displacement measurement frequency of the multi-point image displacement measuring instrument for the slope is increased.

[0028] Preferably, it further includes a control module, which is connected to other module devices of the slope multi-point video image displacement monitoring system to control the operation of other module devices.

[0029] Preferably, it further includes a digital platform, which is communicatively connected to the slope multi-point video image displacement monitoring system.

[0030] Preferably, when the displacement exceeds the 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.

[0031] The monitoring method of the slope multi-point video image displacement monitoring system provided by the present invention includes:

[0032] Construct passive measuring point targets along the slope, with the rope body of the passive measuring point target being inclined and driven into the slope interior, or the rope body being laid on the shallow layer or surface of the slope and then the end being connected to a nail and driven into the slope.

[0033] Set a passive reference target at a position with stable foundation on or outside the slope.

[0034] Set the supplementary lighting unit to face the passive measurement point target and the passive reference target.

[0035] Set a multi-point image displacement measuring instrument to take images of the slope and measure displacement; when the displacement amount exceeds the set threshold, increase the displacement measurement frequency.

[0036] Preferably, the displacement amount includes: the displacement amount of the passive measurement point target relative to the passive reference target and / or the displacement amount of the second target body relative to the first target body or the passive reference target.

[0037] Preferably, there are multiple rope bodies, which radiate around the passive measurement point target.

[0038] Preferably, the on-site environment of the slope is monitored in real time by 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, increase the displacement measurement frequency, and conduct video monitoring of the slope site through a video monitoring module, and upload the displacement measurement data and video data to a digital platform for convenient remote monitoring.

[0039] The present invention has at least the following beneficial effects:

[0040] 1. The present invention adopts a non-contact passive target, which is free of wiring, easy to install, low in cost. Simply using a multi-point image displacement measuring instrument to measure the displacement amount of the passive measurement point target relative to the passive reference target can achieve high-precision displacement measurement and monitoring simply and efficiently.

[0041] 2. In view of the characteristics of slope disasters, the present invention designs a passive measurement point target, which has two target bodies set on one passive measurement point target. The second target body can move up and down relative to the first target body. The rope bodies are arranged along the surface or inside of the slope to form the induction nerves of slope activities. When slope activities such as local settlement, cracking, and increased internal rock and soil gaps occur, the rope bodies are stressed to drive the second target body to move, and the displacement amount can be measured and monitored by a multi-point image displacement measuring instrument. The design of one rod with two targets reduces the number of targets, reduces construction, and reduces costs. The design of the rope bodies increases the coverage of the targets, and effectively, accurately, and in advance captures slope activity signals such as local settlement or cracking.

[0042] Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0043] Figure 1Schematic side view structure of the passive measurement point target of the present invention;

[0044] Figure 2 Schematic front view structure of the passive measurement point target of the present invention;

[0045] Figure 3 Schematic layout structure of the slope multi - point video image displacement monitoring system of the present invention on the slope;

[0046] Figure 4 Principle framework diagram of the slope multi - point video image displacement monitoring system of the present invention;

[0047] Figure 5 Actual layout diagram of the slope multi - point video image displacement monitoring system of the present invention on the slope. Detailed implementation mode

[0048] The following further elaborates on the present invention with reference to examples, so that those skilled in the art can implement it according to the description in the specification.

[0049] It should be understood that terms such as "having", "including", and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0050] As Figures 1 - 4 shown, a slope multi - point video image displacement monitoring system of the present invention includes:

[0051] A passive reference target 20 arranged at a stable position; as Figure 3 shown, the passive reference target 20 is set on the stable foundation below the slope 1 to form a coordinate reference, providing a basis for the accurate measurement of the displacement of the passive measurement point target 10.

[0052] A number of passive measurement point targets 10 arranged on the slope; as Figure 3 shown, a number of passive measurement point targets 10 are arranged on the slope to form a multi - measurement point layout, and each passive measurement point target 10 forms an induction point and a measurement point. Preferably, the passive measurement point targets 10 are preferably arranged in an array to achieve uniform coverage of the slope 1. Another preference is that the passive measurement point targets 10 are set at key positions of the slope, such as positions of potential sliding surfaces, crack development areas, settlement areas, etc.

[0053] A supplementary lighting unit 30 that irradiates light to the passive reference target and the passive measurement point target; the preferred supplementary lighting unit is an infrared supplementary light.

[0054] 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 target images, uses the passive reference target as the coordinate reference, and calculates the displacement of other measuring point targets to achieve high-precision displacement measurement and monitoring.

[0055] The advantages of this embodiment are that one camera can monitor multiple targets simultaneously, realizing a one-to-many measuring point layout; using non-contact passive targets, eliminating the need for wiring, being easy to install, having low cost, and directly using the multi-point image displacement measuring instrument to measure the displacement of the passive measuring point target relative to the passive reference target, simply and efficiently achieving high-precision displacement measurement and monitoring.

[0056] Furthermore, due to the complex and diverse slope disasters, both overall and local ones exist, and the coverage range of a single target is limited. If the coverage is improved by increasing the quantity, not only is the construction volume large but also the cost is high. Therefore, this embodiment provides a passive measuring point target, such as Figures 1 - 3 shown, which includes:

[0057] A base 109, which is buried in the slope 1; preferably, the base is a commonly used ground cage. After digging a hole on the slope, the base can be inserted and then backfilled or poured to install and fix the target on the slope.

[0058] A vertical rod 104, which is fixed on the base 109 and extends upward out of the slope 1; preferably, as Figure 1 shown, the vertical rod is fixed to the base 109 by bolts or welding, and the lower end of the vertical rod is inserted into the base 109 and buried together into the slope 1.

[0059] A first target body 106, which is fixed on the vertical rod 104; in the legend, the first target body 106 is fixed on the vertical rod through a sleeve 105 or a clamp. When the vertical rod 104 slides with the slope or the vertical rod topples, the first target body 106 generates two-dimensional (horizontal and vertical directions) displacement and is monitored by the multi-point image displacement measuring instrument 40.

[0060] A second target body 101, which is arranged on the vertical rod 104 in a vertically movable manner; in the legend, the second target body 101 is located above the first target body 106, and can also be arranged below the first target body 106 in a vertically movable manner. Preferably, as Figure 1 shown, the vertical rod 104 is a hollow tube, and 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.

[0061] The rope body 108, its first end is connected to the second target body 101, the second end extends along the slope, and is pulled by the slope movement to drive the second target body 101 to move; in the legend, the rope body 108 is connected to the second target body 101 through a sliding rod, and when the rope body is pulled, it drives the second target body 101 to move through the sliding rod 102. As Figure 1 and 2 shown, a hole 107 is provided in the middle and lower part of the vertical rod 104, the rope body passes through the inside of the vertical rod 104, passes out from the hole 107, and then extends along the slope 1. The rope body 108 can move without being fixed by the base 109. Preferably, the rope body is made of steel wire rope or other smooth and corrosion-resistant ropes, and the rope diameter is 2 to 40 millimeters.

[0062] As Figure 3 shown, the multi-point image displacement measuring instrument 40 measures the displacement of the second target body 101 relative to the first target body 106 or the passive reference target 20 to monitor the slope. 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 increased internal rock and soil gaps of the slope.

[0063] In this embodiment, two target bodies are provided on one passive measurement point target. The second target body can move up and down relative to the first target body. The rope body is arranged on the surface or inside of the slope (preferably inside), forming the induction nerve of the slope movement. When slope activities such as local settlement, cracking, and increased internal rock and soil gaps of the slope occur, the rope body is pulled to drive the second target body to move, and can be monitored by the multi-point image displacement measuring instrument. The design of one rod with two targets reduces the number of targets, reduces construction, and reduces costs. The design of the rope body increases the coverage of the targets, and can capture local settlement or cracking and other slope activity signals in advance, effectively and accurately, and these signals are often the precursors of slope disasters.

[0064] Further, in another embodiment, as Figure 3 shown, the rope body 108 extends obliquely downward and has at least spans in the horizontal and vertical directions, so as to be able to sense the activities of the slope structure in the horizontal and vertical directions. Taking the horizontal direction as an example, the slope activities such as local settlement or cracks of the slope generate interference forces with the rope body, and then drive the rope body to pull the second target body to move; taking the vertical direction as an example, the local sliding or staggered layer of the slope generates interference forces with the rope body, and then drives the second target body to move. Preferably, the span in the horizontal direction is equal to or close to the distance between adjacent passive measurement point targets 10. For example, if the distance is 5 meters, the span of the rope body in the horizontal direction is 3 to 5 meters, so that the rope body 108 covers the distance; the span in the vertical direction refers to the depth of the extension of the rope body, which is based on being able to cover key positions such as the potential sliding surface, crack development area, and settlement area of the slope. For example, the buried depth of the rope body in a certain soil slope is 1 to 5 meters.

[0065] In this embodiment, considering the complex forms of slope disasters, the rope 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 that cannot be covered or reflected by traditional targets such as ground settlement, ground fissures, local sliding or subsidence, etc., increasing the coverage range.

[0066] Furthermore, in another embodiment, as Figure 3 shown, if it is convenient to construct a drilling rig (such as a small anchor rod drilling rig) on the slope, the rope 108 is driven into the slope 1 through the drilling of the drilling rig. The end of the rope is connected to an anchor head. After the anchor head is driven into the slope by the anchor rod drilling rig, it remains in the slope together with the rope to act as an anchor point. When the slope moves, the rope can be pulled to drive the second target body to move; when it is inconvenient to construct the drilling rig, the rope 108 can be directly laid along the surface or the 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 stress point, so as to capture the activity signal of the slope 1. More preferably, the rope 108 is both driven obliquely into the slope and arranged along the surface or the surface layer of the slope, so as to capture the activity signals of different levels of the slope.

[0067] Furthermore, in another embodiment, as Figure 1 and 2 shown, a limiting member 103 is provided to limit the movement of the second target body 101. When the second target body overcomes the limitation of the limiting member or destroys the limiting member, it can move up and down along the vertical rod. In the illustration, the sliding rod 102 is provided with a horizontally penetrating hole and a limiting member 103 is arranged across it to limit the downward sliding of the sliding rod and thus limit the downward movement of the second target body 101. More preferably, the limiting member 103 has a preset breaking stress. For example, the limiting member 103 is a plastic block or a plastic strip or a plastic bar or a metal wire, etc. Under the traction of the rope 108, the sliding rod 102 is pulled to move downward and generate a shearing action with the vertical rod 104 to break the limiting member 103, so that the second target body can move downward. The design of the limiting member 103 can effectively filter out invalid signals, such as accidental slight touches like fallen trees and fallen rocks, or non-slope disaster activities such as human accidental touches.

[0068] Furthermore, in another embodiment, as Figure 3 shown, a plurality of the ropes 108 are arranged to radiate around the passive measuring point target to increase the coverage range.

[0069] Furthermore, in another embodiment, when the displacement of the second target body relative to the first target body or the passive reference target exceeds the set threshold, the multi-point image displacement measuring instrument increases the displacement measurement frequency of the slope target.

[0070] In a preferred embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, 1 week, 1 month, etc.; if the displacement amount (the displacement amount in the vertical direction, simply referred to as a) of the second target body 101 relative to the first target body 106 measured by the multi-point image displacement measuring instrument 40 is greater than a set threshold A (for example, A = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), and the displacement amount (any displacement amount in the vertical direction or horizontal direction, simply referred to as b) of the first target body 106 relative to the passive reference target 20 is less than a set threshold B (such as B = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it indicates that the position where the target base is located is relatively stable, but local settlement, cracking, and increased internal rock and soil gaps occur within the range covered by the rope body, that is, slope activities occur. At this time, an alarm is issued, and the measurement frequency is increased. (For example, the frequency is increased from 1 Hz to 10 Hz).

[0071] In a preferred embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, 1 week, 1 month, etc.; if the displacement amount (any displacement amount in the vertical direction or horizontal direction, simply referred to as c) of the first target body 106 relative to the passive reference target 20 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 indicates that the slope activity is strong and the risk of slope disasters is high. Similarly, an alarm is issued, and the measurement frequency is increased. (For example, the frequency is increased from 1 Hz to 10 Hz).

[0072] Further, in another embodiment, as Figure 3 and 4 shown, it further includes a solar power supply module 50, which supplies power to the slope multi-point image displacement monitoring system. Figure 4 In this case, the solar power supply module 50 constitutes a solar power supply system, providing 12V DC power for other electrical components.

[0073] Further, in another embodiment, as Figure 3 and 4 shown, it further 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 sleep standby state. When the displacement amount exceeds the 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-mentioned displacement amount refers to the displacement amount of any first target body 106 or second target body 106 relative to the passive reference target 20, or the relative displacement amount between the first target body 106 and the second target body 106.

[0074] Further, in another embodiment, as Figure 4As shown in the figure, 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 for 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 the threshold of 38°C or above, and the relative air humidity reaches 80% or above, the measurement frequency of the multi-point image displacement measuring instrument is increased from the initial state of 1 Hz to 10 Hz.

[0075] As Figure 4 shown in the figure, the video monitoring module 60, the rainfall detection unit 100, the temperature and humidity detection unit 90, and the storage hard disk, etc. constitute the auxiliary subsystem of the system of the present invention.

[0076] Furthermore, in another embodiment, as Figure 4 shown in the figure, it also includes a control module 300, which is connected to other module devices of the slope multi-point video image displacement monitoring system to control the operation of other module devices. In the legend, the control module 300 is arranged in the electrical box, and the electrical box is configured with a lightning arrester, an air switch, a serial communication relay module, a 4G router with a built-in traffic card, an internal temperature sensor of the electrical box, a cooling fan, etc.

[0077] The image displacement measuring instrument 40, the supplementary lighting 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.

[0078] The passive reference target, the passive measurement point target 10, the supplementary lighting unit 30, the image displacement measuring instrument 40, etc. constitute the video image displacement subsystem.

[0079] 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 taken by the multi-point image displacement measuring instrument and perform system settings, such as configuring the operation cycle of other components.

[0080] Furthermore, in another embodiment, as Figure 4 shown in the figure, it also includes a digital platform 80, which is communicatively connected to the slope multi-point video image displacement monitoring system. In the legend, the control module 300 is provided with a 4G router as a communication module, and thus communicates with the data platform 80.

[0081] Preferably, when the displacement exceeds a set threshold (such as 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), the control module saves the picture displacement data captured by the multi-point image displacement measuring instrument and the video captured by the video monitoring module, and uploads the data to the digital platform. The above-mentioned displacement refers to the displacement of any first target body 106 or second target body 106 relative to the passive reference target 20, or the relative displacement between the first target body 106 and the second target body 106.

[0082] Such as Figure 3 and Figure 5 As shown in the figure, a monitoring method of the slope multi-point video image displacement monitoring system of the present invention includes:

[0083] Such as Figure 3 As shown in the figure, the passive measuring point target 10 is constructed along the slope 1. The rope body of the passive measuring point target is inclined and 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 to a nail and driven into the slope, or both are set.

[0084] A passive reference target 20 is set at a position with stable foundation inside or outside the slope 1;

[0085] A supplementary lighting unit 30 is set to face the passive measuring point target and the passive reference target;

[0086] A multi-point image displacement measuring instrument 40 is set to capture images of the slope and measure the target displacement;

[0087] Such as Figure 3 and 5 As shown in the figure, a number of passive measuring point targets 10 and passive reference targets 20 are all within the shooting field of view of the multi-point image displacement measuring instrument 40 and are captured and imaged;

[0088] When the displacement exceeds the set threshold, the displacement measurement frequency is increased. The multi-point image displacement measuring instrument 40 can select existing equipment, such as the AGI-IDM multi-point image displacement monitoring system, with a non-contact measurement accuracy of 0.1 mm and supporting multi-point simultaneous monitoring. The multi-point image displacement measuring instrument 40 captures a number of passive measuring point targets 10 and passive reference targets 20 within the slope range.

[0089] The displacement includes: the displacement of the first target body 106 relative to the passive reference target 20 (in the vertical or horizontal direction), and the displacement of the second target body 101 relative to the first target body 106 or the passive reference target 20 (in the vertical or horizontal direction).

[0090] In one embodiment, within a set period, such as 1 minute, 5 minutes, 10 minutes, 1 hour, 6 hours, 12 hours, 1 day, 1 week, 1 month, etc.; if the displacement amount (the displacement amount in the vertical direction, hereinafter referred to as a) of the second target body 101 relative to the first target body 106 measured by the multi-point image displacement measuring instrument 40 is greater than a set threshold A (for example, A = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), and the displacement amount (any displacement amount in the vertical direction or the horizontal direction, hereinafter referred to as b) of the second target body 101 relative to the passive reference target 20 is less than a set threshold B (such as B = 5 cm, 10 cm, 20 cm, 30 cm, 50 cm or 100 cm, etc.), it indicates that the position where the target base is located is relatively stable, but local settlement, cracking, and increased internal rock and soil gaps occur within the range covered by the rope body, that is, slope activities occur. At this time, an alarm is issued and the measurement frequency is increased. (For example, the frequency is increased from 1 Hz to 10 Hz).

[0091] As Figure 3 As shown, there are multiple rope bodies 108, which radiate around the passive measuring point target. Part of the rope body 108 is arranged inside the slope, and part is arranged on the surface layer or the surface of the slope.

[0092] In one embodiment, the on-site environment of the slope is monitored in real time by the rainfall detection unit and the temperature and humidity detection unit. When any one or more data indicators of rainfall, 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. The displacement measurement data and video data are uploaded to the digital platform for convenient remote monitoring. For example, when the 24-hour rainfall reaches the threshold of 25.0 mm, the temperature reaches 0 °C or below, or the threshold of 38 °C or above, and the relative air humidity reaches 80% or above, the measurement frequency of the multi-point image displacement measuring instrument is increased from the initial state of 1 Hz to 10 Hz.

[0093] Although the embodiments of the present invention have been disclosed as above, they are not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily achieved.

Claims

1. A multi-point video image displacement monitoring system for slopes, characterized in that, Including: A passive reference target arranged at a stable position; A number of passive measurement point targets arranged on the slope; The passive measurement point target includes: A base buried in the slope; A vertical rod fixed on the base and extending upward out of the slope; A first target body fixed on the vertical rod; A second target body arranged on the vertical rod in a vertically movable manner; A rope body connecting the second target body and extending obliquely downward along the slope, having at least spans in the horizontal and vertical directions. The rope body is driven into the slope interior through a drill hole, or laid along the slope surface / surface layer and its end is driven into the slope by a nail. A number of rope bodies are arranged to radiate around the passive measurement point target; A limiting member for limiting the movement of the second target body. The limiting member has a preset failure stress. When the second target body is pulled by the rope body to overcome the limitation of the limiting member or break the limiting member, it can move up and down along the vertical rod; A supplementary lighting unit for irradiating light on the passive reference target and the passive measurement point targets; A multi-point image displacement measuring instrument for monitoring slope activities by measuring the displacement of the second target body relative to the first target body or the passive reference target; Within a set period, when the displacement of the second target body relative to the first target body or the passive reference target exceeds a set threshold A, and the displacement of the first target body relative to the passive reference target is less than a set threshold B, it indicates slope activities such as local settlement, cracking, and increased internal rock and soil gaps of the slope, issues an alarm prompt, and increases the displacement measurement frequency of the multi-point image displacement measuring instrument for slope targets.

2. The slope multi-point video image displacement monitoring system according to claim 1, wherein It further includes: A solar power supply module; A video monitoring module for video monitoring of the slope; A rainfall detection unit for detecting rainfall; A temperature and humidity detection unit for detecting temperature and humidity; A control module connected to the solar power supply module, the video monitoring module, the rainfall detection unit, and the temperature and humidity detection unit; A digital platform communicatively connected to the control module; When any one or more of the rainfall or temperature and humidity data indicators exceed the set threshold, increase the displacement measurement frequency of the multi-point image displacement measuring instrument for the slope; When the displacement exceeds the set threshold, save the data of the multi-point image displacement measuring instrument and the video taken by the video monitoring module, and upload them to the digital platform.

3. The monitoring method of the slope multi-point video image displacement monitoring system according to claim 1, characterized in that, Including: Construct passive measurement point targets along the slope. The rope bodies of the passive measurement point targets are driven obliquely into the slope interior, or the rope bodies are laid on the shallow layer or surface of the slope and then the ends are connected to nails and driven into the slope; Set a passive reference target at a position with stable foundation on or outside the slope; Set the supplementary lighting unit to face the passive measurement point targets and the passive reference target; Set a multi-point image displacement measuring instrument for slope monitoring; Among them, within a set period, when the displacement of the second target body relative to the first target body or the passive reference target exceeds a set threshold A, and the displacement of the first target body relative to the passive reference target is less than a set threshold B, it indicates slope activities such as local settlement, cracking, and increased internal rock and soil gaps of the slope, issues an alarm prompt, and increases the displacement measurement frequency of the multi-point image displacement measuring instrument for slope targets.

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