A symmetrical deformation tunnel monitoring method, device, system and medium

Abstract

The present invention discloses a symmetrical deformation tunnel monitoring method, device, system and medium, the method comprising the following steps: obtaining initial monitoring data and real-time monitoring data of a radar, the initial monitoring data and real-time monitoring data both including the distance between the radar and a first angle inverse and a second angle inverse, and the angle between the radar and the first angle inverse and the second angle inverse, wherein the initial monitoring data is data collected by the radar when the monitored tunnel has not deformed or is about to deform; comparing the distance between the radar and the first angle inverse or the distance between the radar and the second angle inverse in the initial monitoring data with the corresponding data in the real-time monitoring data; in response to the distance between the radar and the first angle inverse or / and the distance between the radar and the second angle inverse in the initial monitoring data being unequal to the corresponding data in the real-time monitoring data and the tunnel undergoing symmetrical deformation, calculating the symmetrical deformation amount. This scheme reduces the number of equipment and monitoring costs, is simple to install, and improves the monitoring accuracy of symmetrical deformation.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel monitoring, and in particular relates to a symmetrical deformation tunnel monitoring method, device, system and medium. Background Art

[0002] With the rapid development of transportation infrastructure, tunnels are widely used as key engineering structures that connect geographical space and improve transportation efficiency. However, the complexity and diversity of tunnel structures make tunnels vulnerable to various diseases during use, such as deformation, cracks, leakage, erosion, etc. These diseases not only affect the normal use and safety of tunnels, but may also cause serious economic losses and social harm.

[0003] In order to improve traffic safety, the existing tunnel deformation monitoring uses radar systems to achieve tunnel deformation monitoring. For example, the "A Tunnel Deformation Monitoring and Early Warning Radar System" with application number 202010786387.3, which is equipped with at least 4 deformation monitoring radar modules, which are distributed in a triangular cone and are used to detect the target to be measured. Three of them are distributed in the same section of the tunnel, located at the top of the tunnel and on both sides of the tunnel, and the remaining one is located on any side a few meters away from the previous section, which is used to detect the distance of the target in the direction of the radar line of sight. The first installation requires a total station to measure the three-dimensional coordinates of each radar module relative to the geodetic coordinate system; the router connects the cloud platform and establishes a local area network for radar system information transmission, and the communication module of the deformation monitoring radar module transmits signals to the central processor through a wireless WiFi local area network link; the central processor receives at least four data channels, respectively solves the distance information between the radar and the target, and uses the positioning algorithm to obtain the three-dimensional coordinates of the target according to the three-dimensional coordinates of the measured radar and the corresponding distance information, so as to realize deformation monitoring.

[0004] However, the existing technology has the following problems:

[0005] 1. Using the above technology, the number of deformation monitoring radar modules must be at least 4 to spatially locate the target angle. The number of deformation monitoring radar modules is large, and the monitoring cost is high.

[0006] 2. Complex installation. During the installation process, it is necessary to use a total station to set control points inside the tunnel to accurately determine the spatial coordinates of the radar and the angle reflector inside the tunnel and install them. This method will greatly increase the difficulty of on-site construction.

[0007] 3. Based on the ranging results of multiple radars, the spatial coordinate system of the target angle is inverted using the principle of spherical intersection. Therefore, the errors of installation and measurement will accumulate with each other, and the accuracy of deformation monitoring is low.

[0008] 4. The coordinate system used for inversion is based on the measurement data of a fixed measurement reference point, and the radar deployed in the tunnel is also in the same tunnel deformation interval. Its coordinates may also change with the deformation of the surrounding rock, that is, the spatial coordinates of the radar measured by the total station at the second point will change, resulting in the inversion result not being the actual deformation result of the tunnel. For example, the tunnel area where the radar is installed has deformed, while the tunnel in the angle reflection area has not deformed, but according to the inversion result, it is believed that the tunnel in the area monitored by the angle reflection has deformed; for example, if the location of a certain radar has deformed, then all the monitoring data results participating in the inversion will have large errors. Summary of the invention

[0009] In order to solve the problems of large number of equipment, high monitoring cost and low accuracy in existing methods, the present invention provides a symmetrical deformation tunnel monitoring method, device, system and medium, which reduces the number of equipment and monitoring cost, is simple to install, and improves the monitoring accuracy of symmetrical deformation.

[0010] The purpose of the present invention is achieved through the following technical solutions:

[0011] A first aspect of the present invention discloses a symmetrical deformation tunnel monitoring method, comprising:

[0012] Obtaining initial monitoring data and real-time monitoring data of the radar, wherein both the initial monitoring data and the real-time monitoring data include the distance between the radar and the first angle inverse, the distance between the radar and the second angle inverse, and the angles between the radar and the first angle inverse and the second angle inverse, wherein the initial monitoring data is the data initially collected after the installation is completed, and when the radar is collecting data, the second angle inverse is arranged in the middle of the tunnel vault, the radar, the first angle inverse, and the second angle inverse are placed on the same tunnel cross section, and the radar and the first angle inverse are symmetrically arranged on the side walls on both sides with the vertical line where the second angle inverse is located as the symmetry axis;

[0013] Comparing the distance between the radar and the first angle inverse or the distance between the radar and the second angle inverse in the initial monitoring data with corresponding data in the real-time monitoring data;

[0014] In response to the distance between the radar and the first angular inverse and / or the distance between the radar and the second angular inverse in the initial monitoring data being not equal to corresponding data in the real-time monitoring data, determining whether the tunnel has undergone symmetrical deformation;

[0015] In response to the symmetrical deformation of the tunnel, the symmetrical deformation amount is calculated based on the initial monitoring data and the real-time monitoring data.

[0016] The second aspect of the present invention discloses a symmetrical deformation tunnel monitoring device, comprising a memory and a controller which are communicatively connected in sequence, wherein the memory stores a computer program, and the controller is used to read the computer program and execute any one of the symmetrical deformation tunnel monitoring methods described in the first aspect.

[0017] A third aspect of the present invention discloses a symmetrical deformation tunnel monitoring system, comprising:

[0018] Angle inversion, the angle inversion comprising a first angle inversion and a second angle inversion, the second angle inversion being used for installation in the middle of the vault of the tunnel to be monitored;

[0019] A radar, wherein the radar is installed on the same cross section of the tunnel to be monitored as the first angle counter and the second angle counter and is symmetrically arranged on the side walls on both sides of the first angle counter with the vertical line where the second angle counter is located as the symmetry axis, and the radar is used to monitor the distance from the first angle counter and the second angle counter and the angle between the first angle counter and the second angle counter;

[0020] The symmetrical deformation tunnel monitoring device described in the second aspect;

[0021] A communication unit, wherein the communication unit is used to realize data transmission between the radar and the symmetrical deformation tunnel monitoring device.

[0022] A fourth aspect of the present invention discloses a computer-readable storage medium, on which instructions are stored. When the instructions are run on a computer, a symmetrical deformation tunnel monitoring method as described in any one of the first aspects is executed.

[0023] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0024] 1. The present invention only needs one radar and two angle sensors to realize tunnel symmetrical deformation monitoring, which reduces the number of equipment required and reduces the monitoring cost.

[0025] 2. The present invention improves the accuracy of symmetrical deformation of the tunnel by setting up the layout of diagonal reflection and radar while reducing the number of equipment.

[0026] 3. The installation of the radar and the angle reflector of the present invention does not require too high installation accuracy. It is only necessary to install all the equipment on the same tunnel section, and at the same time, pay attention to installing the angle reflector and the radar on the side wall at the same horizontal height, so the installation is simple.

[0027] 4. The movement direction of the radar of the present invention is consistent with that of the first angular inversion, and the angle between the movement direction of the second angular inversion and the radar is small, thereby improving the ranging accuracy in the measuring direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of a partial installation structure of the symmetrically deformed tunnel deformation monitoring system of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The first aspect of the present invention discloses a symmetrical deformation tunnel monitoring method, which is performed by a symmetrical deformation tunnel deformation monitoring device, which can be software, or a combination of software and hardware, and can be integrated in smart mobile terminals, tablets, computers, clouds and other smart devices. Specifically, the symmetrical deformation tunnel monitoring method includes the following steps S01 to S04. It should be noted that the step identification in this scheme is only for the convenience of explaining the method, and does not constitute a limitation on the order of sequence. The order of each step is based on its language description and the order of each signal.

[0037] Step S01, obtaining initial monitoring data and real-time monitoring data of the radar, wherein the initial monitoring data and the real-time monitoring data both include the distance between the radar and the first angle inverse, the distance between the radar and the second angle inverse, and the angles between the radar and the first angle inverse and the second angle inverse, wherein the initial monitoring data is data collected by the radar when the monitored tunnel has not been deformed or is about to be deformed, and when the radar is collecting data, the second angle inverse is arranged in the middle of the tunnel vault, the radar, the first angle inverse are arranged, and the second angle inverse are placed on the same tunnel section, and the radar and the first angle inverse are symmetrically arranged on the side walls on both sides with the vertical line where the second angle inverse is located as the symmetry axis.

[0038] The monitoring data in this step includes initial monitoring data and real-time monitoring data, wherein the initial monitoring data is the data collected when the monitored tunnel has not deformed or is about to deform. The monitoring data is obtained by installing a radar and two corners on the same section of the monitored tunnel. For details, the installation method is as follows: Figure 1 , radar 1 and the first angular reflector are arranged on the same horizontal plane so that the radar signal is emitted horizontally and reflected by the first angular reflector.

[0039] When the device is installed, the distance d between the radar and the first angle is collected. 1n , the distance d between the radar and the second angle 2n , the angle θ between the radar and the first angle anti-angle and the second angle anti-angle n At this time, n is 1, indicating initial monitoring data. n is 2, indicating real-time monitoring data.

[0040] In order to improve the accuracy of symmetrical deformation judgment and deformation calculation, the radar and the first angle reflector are installed at the largest span of the tunnel section, such as Figure 1 shown.

[0041] The radar can be any one of centimeter wave radar, microwave radar, photoelectric radar or millimeter wave radar that can measure both distance and angle. In order to improve the accuracy of symmetrical deformation judgment and deformation calculation, the radar preferably uses high-precision radar, such as microwave radar and millimeter wave radar.

[0042] In order to improve the accuracy of monitoring, after obtaining the monitoring data, the median filtering method can be used to filter the noise of the radar echo.

[0043] Angle reflection and radar continuously collect data. Since the environment in the tunnel is relatively complex and vehicles often pass by, and the radar measurement accuracy is relatively high, slight changes in the surrounding environment may affect the measurement results. When a car passes by, false alarms may be generated based on the real-time monitoring data collected by the radar. In this regard, in order to further improve the accuracy of monitoring, it is also possible to determine whether a car passes by at the time of real-time monitoring data collection based on the dynamic threshold set by the constant false alarm rate algorithm; when a car passes by at the time of real-time monitoring data collection, the real-time monitoring data is deleted and does not need to be used as a data source for deformation monitoring.

[0044] In addition, considering that the deformation monitoring of the tunnel is long-term real-time monitoring with a high measurement frequency, and the deformation rate of the tunnel is relatively small, the noise of the radar echo can be filtered out by using the median filtering method, thereby achieving noise reduction processing of the monitoring data.

[0045] Step S02: comparing the distance between the radar and the first angle inverse or the distance between the radar and the second angle inverse in the initial monitoring data with the corresponding data in the real-time monitoring data.

[0046] The above-mentioned angle reflectors and radars are arranged in the tunnel to continuously collect data. When the tunnel has not deformed or is about to deform, the data collected by the radar will not change. When the structural stress in the surrounding rock and environmental factors such as lithology affect the deformation of the tunnel, and the tunnel monitoring section mainly deforms symmetrically, the distance from the first angle reflector or / and the distance from the second angle reflector monitored by the radar will change. That is, d 11 Compared to d 12 will change, or / and, 21 Compared to d 22 Changes will happen.

[0047] Step S03: In response to the distance between the radar and the first angle inverse and / or the distance between the radar and the second angle inverse in the initial monitoring data being not equal to the corresponding data in the real-time monitoring data, it is determined whether the tunnel has undergone symmetrical deformation.

[0048] If at least one of the distance between the radar and the first angle reflector and the distance between the radar and the second angle reflector changes, it can be determined that the tunnel has been deformed.

[0049] The deformation of the tunnel may be symmetrical or asymmetrical. Therefore, after the distance between the radar monitoring and any angle changes, it is necessary to determine whether it is a symmetrical deformation.

[0050] Based on the configuration of the radar and the angle reflector, if the tunnel is symmetrically deformed, the offset of the projection position of the second angle reflector on the horizontal line is small or unchanged.

[0051] In this regard, the method for judging the symmetrical deformation of the tunnel is as follows:

[0052] Specifically, by calculating the T value, , compare T with the threshold. When T is less than or equal to the threshold, it is determined that the tunnel has undergone symmetrical deformation.

[0053] The threshold combines theory and application practice. While taking into account both judgment accuracy and applicability, the threshold is approximately equal to 0. For example, it can be set to values ​​such as 0.01, 0.02, and 0.05.

[0054] Step S04: In response to the symmetrical deformation of the tunnel, the symmetrical deformation amount is calculated according to the initial monitoring data and the real-time monitoring data.

[0055] According to the requirements of deformation monitoring of construction tunnels and operating tunnels, the monitoring contents of tunnel deformation mainly include vault settlement and horizontal convergence monitoring.

[0056] To this end, in this step, the amount of vault subsidence and horizontal convergence can be calculated based on the radar monitoring data.

[0057] Specifically, for the horizontal convergence amount, that is, the displacement amount Δd1 around the tunnel, it is calculated based on the distance d between the radar and the first angle in the initial monitoring data. 11 and the distance d between the radar and the first angle in the real-time monitoring data 12 Calculated.

[0058] Among them, △d1=d 11 -d 12 .

[0059] The dome sinking amount Δd2 is calculated based on the distance d between the radar and the second angle in the initial monitoring data. 21, the angle θ1 between the radar and the first and second angles, and the distance d between the radar and the second angle in the real-time monitoring data 22 The angle θ2 between the radar and the first angle inverse and the second angle inverse is calculated.

[0060] .

[0061] The second aspect of the present invention discloses a symmetrically deformed tunnel deformation monitoring device, comprising a memory and a controller that are sequentially connected in communication, the memory storing a computer program, the controller being used to read the computer program and execute a symmetrically deformed tunnel monitoring method described in any one of the first aspects. Specifically, the memory may include, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a flash memory (Flash Memory), a first-in-first-out memory (FIFO) and / or a first-in-last-out memory (FILO), etc.; the controller may not be limited to a microcontroller of the STM32F105 series. In addition, the computer device may also include, but is not limited to, a power supply unit, a display screen and other necessary components.

[0062] The third aspect of the present invention discloses a symmetrically deformed tunnel deformation monitoring system, comprising:

[0063] Angle inversion, the angle inversion comprising a first angle inversion 21 and a second angle inversion 22, the second angle inversion 22 being used for installation in the middle of the vault of the tunnel to be monitored;

[0064] Radar 1, the radar is used to be installed on the same cross section of the tunnel 3 to be monitored with the first angle counter and the second angle counter and is symmetrically arranged on the side walls on both sides of the first angle counter with the vertical line where the second angle counter is located as the symmetry axis, and the radar is used to monitor the distance from the first angle counter and the second angle counter and the angle between the first angle counter and the second angle counter;

[0065] The symmetrical deformation tunnel monitoring device described in the second aspect;

[0066] A communication unit, wherein the communication unit is used to realize data transmission between the radar and the symmetrical deformation tunnel monitoring device.

[0067] The communication unit has multiple options according to the distance between the radar and the symmetrical deformation tunnel monitoring device. If the distance between the two is short, it can be a data transmission line; if the distance between the two is far, it can be a remote communication unit.

[0068] A fourth aspect of the present invention discloses a computer-readable storage medium, on which instructions are stored. When the instructions are run on a computer, a symmetrical deformation tunnel monitoring method as described in any one of the first aspects is executed.

[0069] The operating principles of the devices, systems and media disclosed in the second, third and fourth aspects of the present invention are detailed in the first aspect and will not be repeated here.

[0070] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring a symmetrically deformed tunnel, characterized in that: include: Obtaining initial monitoring data and real-time monitoring data of the radar, wherein both the initial monitoring data and the real-time monitoring data include the distance between the radar and the first angle inverse, the distance between the radar and the second angle inverse, and the angles between the radar and the first angle inverse and the second angle inverse, wherein the initial monitoring data is data collected by the radar when the monitored tunnel has not deformed or is about to deform, and when the radar collects data, the second angle inverse is arranged in the middle of the tunnel vault, the radar, the first angle inverse, and the second angle inverse are arranged on the same tunnel cross section, and the radar and the first angle inverse are symmetrically arranged on the side walls on both sides with the vertical line where the second angle inverse is located as the symmetry axis; Comparing the distance between the radar and the first angle inverse or the distance between the radar and the second angle inverse in the initial monitoring data with corresponding data in the real-time monitoring data; In response to the distance between the radar and the first angle inverse and / or the distance between the radar and the second angle inverse in the initial monitoring data being not equal to the corresponding data in the real-time monitoring data, determining whether the tunnel has undergone symmetrical deformation; In response to the symmetrical deformation of the tunnel, the symmetrical deformation amount is calculated according to the initial monitoring data and the real-time monitoring data; The determining whether the tunnel has undergone symmetrical deformation comprises: Calculate T, where , Among them, d 21 is the distance between the radar and the second angle in the initial monitoring data, d 22 is the distance between the radar and the second angle in the real-time monitoring data, θ1 is the angle between the radar and the first angle, the second angle, θ2 is the angle between the radar and the first angle, the second angle, d 11 is the distance between the radar and the first angle in the initial monitoring data, d 12 It is the distance between the radar and the first angle in the real-time monitoring data; Compare T with the threshold, In response to T being less than or equal to the threshold, the tunnel undergoes symmetrical deformation.

2. A symmetrical deformation tunnel monitoring method according to claim 1, characterized in that: The calculation of the symmetrical deformation amount according to the initial monitoring data and the real-time monitoring data comprises: According to the distance d between the radar and the first angle in the initial monitoring data 11 and the distance d between the radar and the first angle in the real-time monitoring data 12 The displacement around the tunnel △d1 is calculated. Where, △d1 = d 11 -d 12 .

3. A symmetrical deformation tunnel monitoring method according to claim 1, characterized in that: The calculation of the symmetrical deformation amount according to the initial monitoring data and the real-time monitoring data comprises: According to the distance d between the radar and the second angle in the initial monitoring data 21 , the angle θ1 between the radar and the first and second angles, and the distance d between the radar and the second angle in the real-time monitoring data 22 The included angle θ2 between the radar and the first and second angles is used to calculate the tunnel crown subsidence △d2. in, .

4. A symmetrical deformation tunnel monitoring method according to claim 1, characterized in that: The radar and the first angle reflector are respectively installed at the location where the tunnel cross-section has the largest span.

5. A symmetrical deformation tunnel monitoring method according to claim 1, characterized in that: After obtaining the initial monitoring data and real-time monitoring data of the radar, the method further includes: According to the dynamic threshold set by the constant false alarm rate algorithm, it is judged whether there is a car passing by at the time of real-time monitoring data collection; In response to a car passing by at the time of collecting the real-time monitoring data, the real-time monitoring data is deleted.

6. A symmetrical deformation tunnel monitoring device, comprising a memory and a controller which are sequentially connected in communication, wherein a computer program is stored in the memory, characterized in that: The controller is used to read the computer program and execute the symmetrical deformation tunnel monitoring method described in any one of claims 1-5.

7. A symmetrical deformation tunnel monitoring system, characterized in that: include: Angle inversion, the angle inversion comprising a first angle inversion (21) and a second angle inversion (22), the second angle inversion (22) being used for installation in the middle of the vault of the tunnel to be monitored; A radar (1), the radar being installed on the same cross section of a tunnel (3) to be monitored together with the first angle counter and the second angle counter and being symmetrically arranged on the side walls on both sides of the first angle counter with the vertical line of the second angle counter as the symmetry axis, the radar being used to monitor the distance from the first angle counter and the second angle counter and the angle between the first angle counter and the second angle counter; The symmetrical deformation tunnel monitoring device according to claim 6; A communication unit, wherein the communication unit is used to realize data transmission between the radar and the symmetrical deformation tunnel monitoring device.

8. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed on a computer, a symmetrical deformation tunnel monitoring method according to any one of claims 1 to 5 is executed.

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