Road collapse monitoring method, device and equipment based on grating array and medium

Abstract

The invention provides a road collapse monitoring method, device and equipment based on a grating array and a medium, and belongs to the technical field of road monitoring, and the method comprises the steps: obtaining a vibration response signal of a road structure collected by a grating array vibration sensing optical cable; determining a sensing link length based on the vibration response signal, and judging whether the sensing link length is smaller than a reference link length; if so, determining that the roadbed of the road structure is collapsed; if yes, determining a vibration characteristic value based on the vibration response signal, and determining whether the roadbed of the road structure collapses or not based on the vibration characteristic value. According to the method, whether the roadbed is collapsed or not can be judged only through the sensing link length determined based on the vibration response information, the judgment process is simple, and the timeliness of road collapse monitoring is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of road monitoring, and in particular to a road collapse monitoring method, device, equipment and medium based on a grating array. Background Art

[0002] The collapse and damage (collapse) of highways and urban roads is a geological phenomenon in which the roadbed of highways and urban roads forms collapsed pits (holes) due to natural or human factors. The collapse of highways and urban roadbeds increases the risk of traffic accidents and casualties, and also causes problems such as sinking of building foundations, cracking of houses, damage to underground pipelines, and intensification of urban floods and storm surge disasters. Once it occurs, the consequences are extremely serious, not only causing serious interruptions to road network traffic, but also posing a threat to the safety of life and property, and easily causing adverse social impacts.

[0003] There are some methods for detecting roadbed voids, including ground penetrating radar, video image recognition, ultrasonic non-destructive testing, etc. The ground penetrating radar method uses radar equipment to patrol along the road and obtain electromagnetic wave data, and obtains the void position through data interpretation. This method requires regular patrols, has poor timeliness, and is difficult to achieve real-time monitoring of collapse; video image recognition uses a camera to shoot the road conditions, and then processes the graphics to find abnormal points and circle the void position. This method requires video image recognition, and the recognition speed is very slow, resulting in poor alarm timeliness; the ultrasonic non-destructive testing method also requires equipment to patrol the road, and there is also the problem of alarm timeliness.

[0004] Therefore, there is an urgent need to provide a road collapse monitoring method, device, equipment and medium based on a grating array to improve the timeliness of road collapse monitoring. Summary of the invention

[0005] In view of this, it is necessary to provide a road collapse monitoring method, device, equipment and medium based on a grating array to solve the technical problem in the prior art that the process of monitoring road collapse through inspection or image recognition is complicated, resulting in low timeliness.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides a road collapse monitoring method based on a grating array, comprising: Acquire the vibration response signal of the road structure collected by the grating array vibration sensor optical cable; Determining a sensing link length based on the vibration response signal, and determining whether the sensing link length is less than a reference link length; If it is less than, it is determined that the roadbed of the road structure has collapsed; if it is equal to, a vibration characteristic value is determined based on the vibration response signal, and based on the vibration characteristic value, it is determined whether the roadbed of the road structure has collapsed.

[0007] In a possible implementation, the vibration characteristic value includes the amplitude of each measuring point; then determining whether the roadbed of the road structure has collapsed based on the vibration characteristic value includes: Determine at least one target amplitude based on the amplitude; the target amplitude is an amplitude of the amplitude that is greater than an amplitude threshold; determining an amplitude frequency based on the at least one target amplitude and a preset window length, and determining whether the amplitude frequency is greater than a frequency threshold; When the amplitude frequency is greater than the frequency threshold, the roadbed collapses.

[0008] In a possible implementation, the vibration characteristic value further includes an amplitude growth rate of each measuring point; when the amplitude frequency is less than or equal to the frequency threshold, the method further includes: Determining whether the amplitude growth rate is greater than a growth rate threshold; When the amplitude growth rate is greater than a growth rate threshold, it is determined that there is a gap in the road structure at the measuring point corresponding to the amplitude growth rate.

[0009] In a possible implementation, the amplitude growth rate is:

[0010] In the formula, is the amplitude growth rate; is the accumulated value of the amplitude of the previous i vehicles passing the measuring point; is the amplitude when the vehicle passes the measuring point for the first time.

[0011] In a possible implementation, the road structure includes an uplink road structure and a downlink road structure, and the grating array vibration sensing optical cable includes a first vibration sensing optical cable laid in the uplink road structure and a second vibration sensing optical cable laid in the downlink road structure; the method further includes: Acquire a first vibration response signal of an upward road structure collected by the first vibration sensing optical cable, and acquire a second vibration response signal of a downward road structure collected by the second vibration sensing optical cable; Determining whether the similarity between the first vibration response signal and the second vibration response signal is less than a preset similarity; When the similarity is less than the preset similarity, the road structure is unilaterally empty or collapsed; When the similarity is greater than or equal to the preset similarity, the road structure is hollowed out or collapsed on both sides.

[0012] In a possible implementation manner, before determining whether the sensing link length is less than the reference link length, the method further includes: A self-test is performed on the grating array vibration sensing optical cable.

[0013] In a possible implementation, the method further includes: When the roadbed of the road structure collapses, determining the collapse location; Controlling the video monitoring equipment at the collapsed position to obtain an image of the collapsed position; Based on the image, it is determined whether the roadbed has collapsed. When it is determined that the roadbed has collapsed, prompt information is generated and sent to drivers and road management.

[0014] On the other hand, the present invention also provides a road collapse monitoring device based on a grating array, comprising: A vibration response information acquisition unit, used to acquire a vibration response signal of a road structure collected by a grating array vibration sensing optical cable; a sensing link length determination unit, configured to determine a sensing link length based on the vibration response signal, and determine whether the sensing link length is less than a reference link length; A collapse determination unit is used to determine whether the roadbed of the road structure has collapsed when the sensing link length is less than the reference link length; when the sensing link length is equal to the reference link length, determine the vibration characteristic value based on the vibration response signal, and determine whether the roadbed of the road structure has collapsed based on the vibration characteristic value.

[0015] On the other hand, the present invention also provides a road collapse monitoring device based on a grating array, comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the road collapse monitoring method based on the grating array described in any one of the possible implementations above.

[0016] On the other hand, the present invention also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the road collapse monitoring method based on a grating array described in any possible implementation method mentioned above are implemented.

[0017] The beneficial effects of the present invention are as follows: the road collapse monitoring method based on the grating array provided by the present invention collects the vibration response signal of the road structure through the grating array vibration sensing optical cable, and the collection is rapid, and no complicated inspection and identification process is required, thereby improving the timeliness of road collapse monitoring. In addition, the present invention only needs to determine the length of the sensing link based on the vibration response information to realize the judgment of whether the roadbed has collapsed, and the judgment process is simple, thereby further improving the timeliness of road collapse monitoring.

[0018] Furthermore, the embodiment of the present invention improves the accuracy and comprehensiveness of collapse monitoring by arranging that when the sensing link length is equal to the reference link length, whether the roadbed has collapsed is judged based on the vibration characteristic value.

[0019] Furthermore, the present invention realizes the monitoring of road collapse based on the grating array vibration sensing optical cable, which can realize the full-area and all-weather real-time monitoring of the road structure, further ensuring the timeliness and accuracy of the road collapse monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic flow chart of an embodiment of a road collapse monitoring method based on a grating array provided by the present invention; Figure 2 A schematic diagram of a vibration response signal when a road structure collapses and a grating array vibration sensing optical cable breaks provided by the present invention; Figure 3 A schematic diagram of a vibration response signal when the road structure provided by the present invention collapses and the grating array vibration sensing optical cable is not broken; Figure 4 A schematic diagram of a flow chart of an embodiment of determining whether a roadbed of a road structure has collapsed based on a vibration characteristic value in the present invention; Figure 5 A schematic diagram of a vibration response signal when a roadbed provided by the present invention is de-aired; Figure 6 A schematic diagram of a flow chart of an embodiment of the present invention for determining whether degassing has occurred; Figure 7 A schematic diagram of a flow chart of an embodiment of the present invention for determining whether an up-road structure and a down-road structure have collapsed; Figure 8 A schematic diagram of a flow chart of an embodiment of providing an early warning when collapse occurs provided by the present invention; Fig. 9 A schematic diagram of the structure of an embodiment of a road collapse monitoring device based on a grating array provided by the present invention; Fig.10 A schematic structural diagram of an embodiment of a road collapse monitoring device based on a grating array provided by the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] It should be understood that the schematic drawings are not drawn to scale. The flowchart used in the present invention shows the operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowchart can be implemented out of order, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art, under the guidance of the content of the present invention, can add one or more other operations to the flowchart, and can also remove one or more operations from the flowchart. Some of the block diagrams shown in the accompanying drawings are functional entities, which do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0024] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The present invention provides a road collapse monitoring method, device, equipment and medium based on a grating array, which are described below respectively.

[0026] Figure 1 A schematic flow chart of an embodiment of a road collapse monitoring method based on a grating array provided by the present invention is shown in FIG. Figure 1 As shown, the road collapse monitoring method based on the grating array includes: S101, obtaining a vibration response signal of a road structure collected by a grating array vibration sensing optical cable; S102, determining a sensing link length based on the vibration response signal, and determining whether the sensing link length is less than a reference link length; S103. If it is less than , it is determined that the roadbed of the road structure has collapsed; if it is equal to , a vibration characteristic value is determined based on the vibration response signal, and whether the roadbed of the road structure has collapsed is determined based on the vibration characteristic value.

[0027] Among them, there are two ways to obtain the vibration response signal in step S101. One is to directly obtain the vibration response signal collected in real time by the grating array vibration sensor optical cable, and the other is to store the vibration response signals collected by the grating array vibration sensor optical cable in a storage medium. When step S101 is executed, the vibration response signal is called from the storage medium.

[0028] It should be noted that the sensing link length in step S102 refers to the duration of the vibration response signal.

[0029] Specifically, the grating array vibration sensor optical cable includes multiple measuring points. Under normal circumstances, the vibration response signal is a continuous signal corresponding to the multiple measuring points. When the grating array vibration sensor optical cable breaks due to roadbed collapse, the vibration response signals of some measuring points cannot be measured, that is, the cutoff position of the sensing link length is the collapse position.

[0030] In a specific embodiment of the present invention, Figure 2 As shown, the reference link length is the line segment length between ab, and when collapse occurs at c, the sensing link length is the line segment length between ac, that is, the collapse can be judged by comparing the sensing link length with the reference link length.

[0031] Among them, the reference link length is measured when the grating array vibration sensor optical cable is laid and it is confirmed that the grating array vibration sensor optical cable is not broken, so as to ensure the reference value of the reference link length.

[0032] Because only when the roadbed collapses to a large extent will the grating array vibration sensor cable break, that is, the sensing link length will change. In actual application scenarios, there may be a situation where the roadbed collapses but the sensing link length does not change. To achieve collapse monitoring in this situation, the embodiment of the present invention is set to determine whether the roadbed collapses based on the vibration characteristic value, thereby improving the comprehensiveness of the roadbed collapse judgment.

[0033] Compared with the prior art, the road collapse monitoring method based on the grating array provided in the embodiment of the present invention collects the vibration response signal of the road structure through the grating array vibration sensing optical cable, and the collection is rapid, without the need for complex inspection and identification processes, thereby improving the timeliness of road collapse monitoring. In addition, the embodiment of the present invention only needs to determine the length of the sensing link based on the vibration response information to determine whether the roadbed has collapsed, and the judgment process is simple, thereby further improving the timeliness of road collapse monitoring.

[0034] Furthermore, the embodiment of the present invention improves the accuracy and comprehensiveness of collapse monitoring by arranging that when the sensing link length is equal to the reference link length, whether the roadbed has collapsed is judged based on the vibration characteristic value.

[0035] Furthermore, the embodiment of the present invention realizes the monitoring of road collapse based on the grating array vibration sensing optical cable, which can realize the full-area and all-weather real-time monitoring of the road structure, further ensuring the timeliness and accuracy of the road collapse monitoring.

[0036] In a specific embodiment of the present invention, Figure 3 is the vibration response signal when the roadbed collapses but the grating array vibration sensor cable is not broken. Figure 3 It can be seen that when the roadbed collapses, the vibration response signal will show high amplitude and high frequency. Based on this characteristic, in some embodiments of the present invention, the vibration characteristic value includes the amplitude of each measuring point; Figure 4 As shown, the step S103 of determining whether the roadbed of the road structure has collapsed based on the vibration characteristic value includes: S401, determining at least one target amplitude based on the amplitude; the target amplitude is an amplitude greater than an amplitude threshold; S402, determining an amplitude frequency based on at least one target amplitude and a preset window length, and determining whether the amplitude frequency is greater than a frequency threshold; S403: When the amplitude frequency is greater than the frequency threshold, the roadbed collapses.

[0037] Among them, the amplitude threshold and the frequency threshold can be calibrated according to the actual road structure, and no specific limitation is made here.

[0038] The embodiment of the present invention determines whether the roadbed has collapsed based on the amplitude and the amplitude frequency, and the determination result is accurate.

[0039] It should be noted that the amplitude frequency in step S402 refers to the ratio of the number of target amplitudes to the window length within a preset window.

[0040] In actual application scenarios, there is also a situation that affects the safety of road structures, namely: voiding. Voiding occurs below the road surface and cannot be seen by naked eye. However, voiding will gradually evolve into collapse. In order to achieve early prediction of collapse, in some embodiments of the present invention, it is also necessary to identify the voiding condition.

[0041] like Figure 5 As shown in FIG. 1 , when the roadbed is debonded, the vibration response signal is characterized by a sudden increase in amplitude. Based on this characteristic, in some embodiments of the present invention, the vibration characteristic value also includes the amplitude growth rate of each measuring point. Figure 6 As shown, when the amplitude frequency is less than or equal to the frequency threshold, the road collapse monitoring method based on the grating array further includes: S601, determining whether the amplitude growth rate is greater than a growth rate threshold; S602: When the amplitude growth rate is greater than the growth rate threshold, it is determined that there is a gap in the road structure at the measuring point corresponding to the amplitude growth rate.

[0042] Since air gapping is an evolving process, if air gapping has occurred at the current moment, when calculating the amplitude growth rate between the next moment and the current moment, the amplitude growth rate will change slightly, which will lead to misjudgment of air gapping. Therefore, in order to accurately identify air gapping, in some embodiments of the present invention, the amplitude growth rate is:

[0043] In the formula, is the amplitude growth rate; is the accumulated value of the amplitude of the previous i vehicles passing the measuring point; is the amplitude when the vehicle passes the measuring point for the first time.

[0044] The embodiment of the present invention accumulates the amplitudes of multiple vehicle passes to obtain an amplitude accumulation value, and determines the amplitude growth rate based on the amplitude accumulation value, thereby improving the accuracy of identifying air gaps.

[0045] The growth rate threshold may be specifically defined according to the actual application scenario. In a specific embodiment of the present invention, the growth rate threshold is 3.

[0046] In actual scenarios, the road structure includes an up-going road structure and a down-going road structure. To achieve rapid monitoring of the collapse of the up-going road structure and the down-going road structure, in some embodiments of the present invention, the grating array vibration sensing optical cable includes a first vibration sensing optical cable laid in the up-going road structure and a second vibration sensing optical cable laid in the down-going road structure; Figure 7 As shown, the road collapse monitoring method based on the grating array also includes: S701, obtaining a first vibration response signal of an upward road structure collected by a first vibration sensing optical cable, and obtaining a second vibration response signal of a downward road structure collected by a second vibration sensing optical cable; S702, determining whether the similarity between the first vibration response signal and the second vibration response signal is less than a preset similarity; S703: When the similarity is less than the preset similarity, the road structure has one-side gap or collapse; S704: When the similarity is greater than or equal to the preset similarity, the road structure is hollowed out or collapsed on both sides.

[0047] The embodiment of the present invention can quickly determine whether the collapse is on one side or on both sides through the similarity between the first vibration response signal and the second vibration response signal, and in the case of a single-side collapse, the collapse position can be quickly located, further improving the timeliness of monitoring the road collapse.

[0048] The similarity may be the sum of the differences between the first vibration response signal and the signals of the symmetrical measurement points in the second vibration response signal.

[0049] It should be understood that the first vibration sensing optical cable and the second vibration sensing optical cable can be connected via a sensing optical cable or a common communication optical cable.

[0050] Specifically: The vibration responses of the normal road are basically similar on the up and down roads. When one side of the road is empty or collapsed, the other side may be normal, half-destroyed or destroyed. Therefore, by comparing the sensor signals on both sides, the status of both sides can be quickly evaluated: Similar status on both sides: When the optical cable signals on both sides of the road are similar, it can be preliminarily determined that the health status of the structures on both sides of the road is similar, and there is no obvious unilateral collapse. Whether the vibration distribution on both sides is stable and abnormal and comparing the sensor link length of the baseline state can further determine whether the road is empty or collapsed and the degree of collapse on both sides.

[0051] The status on both sides is obviously different: When the sensor optical cable signals on both sides of the highway are obviously different, it means that the highway roadbed has been emptied or collapsed on one side (or the degree of emptied or collapsed is different). Through further analysis of the vibration distribution status on both sides, it can be determined which side has been emptied or collapsed, and the degree of collapse can be quickly determined by comparing the baseline status, vehicle vibration signals, and sensor link length. The undamaged side should also be monitored more closely to prevent it from being affected by the collateral effects or subsequent disasters. According to the evaluation results, timely measures should be taken to ensure safe road operation.

[0052] Since the preliminary judgment of road structure collapse is based on the sensing link length, in order to avoid the damage of the grating array vibration sensing optical cable itself causing an error in the monitoring result of road collapse, in some embodiments of the present invention, before judging whether the sensing link length is less than the reference link length, the following is further included: Perform a self-test on the grating array vibration sensing optical cable.

[0053] The self-inspection specifically includes: scanning the link of the grating array vibration sensor optical cable to determine whether there is any problem, so as to ensure the accuracy of monitoring the collapse of the road structure.

[0054] When the self-test result is correct, the sensing link length and the reference link length are judged. When the self-test result is incorrect, the fault is checked and restored, and then the sensing link length and the reference link length are judged.

[0055] In order to reduce the impact of road structure collapse and ensure property safety, in some embodiments of the present invention, Figure 8 As shown, the road collapse monitoring method based on the grating array also includes: S801. When a roadbed collapse occurs in a road structure, determine the collapsed location; S802, controlling the video monitoring device at the collapsed location to obtain an image of the collapsed location; S803: Determine whether the roadbed has collapsed based on the image. When it is determined that the roadbed has collapsed, generate prompt information and send the prompt information to the driver and the road management.

[0056] Among them, each measuring point of the road structure is bound to the actual position of the road. When it is determined that the roadbed has collapsed, the actual position of the road, that is, the collapsed position, can be obtained based on the measuring point of the vibration sensor signal.

[0057] The embodiment of the present invention verifies and confirms the collapse through images obtained by video monitoring equipment, thereby ensuring the accuracy of the collapse judgment.

[0058] It should be understood that drivers and passengers can avoid the collapsed location based on the prompt information, and road management can set warning signs for the collapsed location based on the prompt information to prompt other vehicles to avoid this location and avoid property losses.

[0059] In summary, the road collapse monitoring method based on grating array proposed in the embodiment of the present invention can quickly diagnose the road subsidence situation, and provide the traffic operation management party, other traffic road networks, and moving vehicles with the road collapse warning, rapid alarm and rapid positioning ahead. Furthermore, it can effectively avoid the extreme situation that the road subsidence is not captured in time when the detection cable is not damaged or broken. In addition, the embodiment of the present invention can adapt to different road operation environments, has strong anti-interference ability, and short alarm response time.

[0060] In order to better implement the road collapse monitoring method based on grating array in the embodiment of the present invention, on the basis of the road collapse monitoring method based on grating array, the embodiment of the present invention also provides a road collapse monitoring device based on grating array, such as Fig. 9 As shown, the road collapse monitoring device 900 based on the grating array includes: A vibration response information acquisition unit 901 is used to acquire a vibration response signal of a road structure collected by a grating array vibration sensing optical cable; A sensing link length determination unit 902, configured to determine the sensing link length based on the vibration response signal, and determine whether the sensing link length is less than a reference link length; The collapse determination unit 903 is used to determine whether the roadbed of the road structure has collapsed when the sensing link length is less than the reference link length; when the sensing link length is equal to the reference link length, determine the vibration characteristic value based on the vibration response signal, and determine whether the roadbed of the road structure has collapsed based on the vibration characteristic value.

[0061] It should be noted that the grating array-based road collapse monitoring device 900 provided in the above embodiment can implement the technical solution described in the above embodiment of the grating array-based road collapse monitoring method. The specific implementation principles or specific implementation details of the above modules or units can refer to the corresponding contents in the above embodiment of the grating array-based road collapse monitoring method, which will not be described one by one here.

[0062] like Fig.10 As shown, the present invention also provides a road collapse monitoring device 1000 based on a grating array. The road collapse monitoring device 1000 based on a grating array includes a processor 1001, a memory 1002 and a display 1003. Fig.10 Only some components of the grating array-based road collapse monitoring device 1000 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0063] In some embodiments, the processor 1001 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 1002, such as the road collapse monitoring method based on the grating array in the present invention.

[0064] In some embodiments of the present invention, processor 1001 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 1001 may be local or remote. In some embodiments, processor 1001 may be implemented in a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0065] In some embodiments, the memory 1002 may be an internal storage unit of the grating array-based road collapse monitoring device 1000 , such as a hard disk or memory of the grating array-based road collapse monitoring device 1000 .

[0066] Furthermore, the memory 1002 may include both an internal storage unit of the grating array-based road collapse monitoring device 1000 and an external storage device. The memory 1002 is used to store application software and various data for installing the grating array-based road collapse monitoring device 1000.

[0067] In some embodiments, the display 1003 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 1003 is used to display information of the road collapse monitoring device 1000 based on the grating array and to display a visual user interface. The components 1001-1003 of the road collapse monitoring device 1000 based on the grating array communicate with each other through a system bus.

[0068] In some embodiments of the present invention, when the processor 1001 executes the road collapse monitoring program based on the grating array in the memory 1002, the following steps may be implemented: Acquire the vibration response signal of the road structure collected by the grating array vibration sensor optical cable; Determine the sensing link length based on the vibration response signal, and determine whether the sensing link length is less than the reference link length; If it is less than, it is determined that the roadbed of the road structure has collapsed; if it is equal to, the vibration characteristic value is determined based on the vibration response signal, and based on the vibration characteristic value, it is determined whether the roadbed of the road structure has collapsed.

[0069] It should be understood that: when the processor 1001 executes the grating array-based road collapse monitoring program in the memory 1002, in addition to the above functions, other functions can also be implemented. For details, please refer to the description of the corresponding method embodiment above.

[0070] Furthermore, the embodiment of the present invention does not specifically limit the type of the road collapse monitoring device 1000 based on the grating array. The road collapse monitoring device 1000 based on the grating array can be a portable road collapse monitoring device based on the grating array, such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable road collapse monitoring devices based on the grating array include but are not limited to portable road collapse monitoring devices based on the grating array equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable road collapse monitoring device based on the grating array can also be other portable road collapse monitoring devices based on the grating array, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the road collapse monitoring device 1000 based on the grating array may not be a portable road collapse monitoring device based on the grating array, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0071] Correspondingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the steps or functions of the road collapse monitoring method based on the grating array provided in the above-mentioned method embodiments.

[0072] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0073] The above is a detailed introduction to the road collapse monitoring method, device, equipment and medium based on a grating array provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A road collapse monitoring method based on a grating array, characterized in that: include: Acquire the vibration response signal of the road structure collected by the grating array vibration sensor optical cable; Determining a sensing link length based on the vibration response signal, and determining whether the sensing link length is less than a reference link length; If it is less than, it is determined that the roadbed of the road structure has collapsed; If they are equal, a vibration characteristic value is determined based on the vibration response signal, and whether the roadbed of the road structure has collapsed is determined based on the vibration characteristic value.

2. The road collapse monitoring method based on grating array according to claim 1, characterized in that: The vibration characteristic value includes the amplitude of each measuring point; then determining whether the roadbed of the road structure has collapsed based on the vibration characteristic value includes: Determine at least one target amplitude based on the amplitude; the target amplitude is an amplitude of the amplitude that is greater than an amplitude threshold; determining an amplitude frequency based on the at least one target amplitude and a preset window length, and determining whether the amplitude frequency is greater than a frequency threshold; When the amplitude frequency is greater than the frequency threshold, the roadbed collapses.

3. The road collapse monitoring method based on grating array according to claim 2 is characterized in that: The vibration characteristic value also includes the amplitude growth rate of each measuring point; when the amplitude frequency is less than or equal to the frequency threshold, the method further includes: Determining whether the amplitude growth rate is greater than a growth rate threshold; When the amplitude growth rate is greater than a growth rate threshold, it is determined that there is a gap in the road structure at the measuring point corresponding to the amplitude growth rate.

4. The road collapse monitoring method based on grating array according to claim 3 is characterized in that: The amplitude growth rate is: In the formula, is the amplitude growth rate; is the accumulated value of the amplitude of the previous i vehicles passing the measuring point; is the amplitude when the vehicle passes the measuring point for the first time.

5. The road collapse monitoring method based on grating array according to claim 1, characterized in that: The road structure includes an uplink road structure and a downlink road structure, and the grating array vibration sensing optical cable includes a first vibration sensing optical cable laid in the uplink road structure and a second vibration sensing optical cable laid in the downlink road structure; the method further includes: Acquire a first vibration response signal of an upward road structure collected by the first vibration sensing optical cable, and acquire a second vibration response signal of a downward road structure collected by the second vibration sensing optical cable; Determining whether the similarity between the first vibration response signal and the second vibration response signal is less than a preset similarity; When the similarity is less than the preset similarity, the road structure is unilaterally empty or collapsed; When the similarity is greater than or equal to the preset similarity, the road structure is hollowed out or collapsed on both sides.

6. The road collapse monitoring method based on grating array according to claim 1, characterized in that: Before determining whether the sensing link length is less than the reference link length, the method further includes: A self-test is performed on the grating array vibration sensing optical cable.

7. The road collapse monitoring method based on grating array according to claim 1, characterized in that: The method further comprises: When the roadbed of the road structure collapses, determining the collapse location; Controlling the video monitoring equipment at the collapsed position to obtain an image of the collapsed position; Based on the image, it is determined whether the roadbed has collapsed. When it is determined that the roadbed has collapsed, prompt information is generated and sent to drivers and road management.

8. A road collapse monitoring device based on a grating array, characterized in that: include: A vibration response information acquisition unit, used to acquire a vibration response signal of a road structure collected by a grating array vibration sensing optical cable; a sensing link length determination unit, configured to determine a sensing link length based on the vibration response signal, and determine whether the sensing link length is less than a reference link length; A collapse determination unit, used for determining that a roadbed of the road structure has collapsed when the sensing link length is less than a reference link length; When the sensing link length is equal to the reference link length, a vibration characteristic value is determined based on the vibration response signal, and whether a roadbed of the road structure collapses is determined based on the vibration characteristic value.

9. A road collapse monitoring device based on a grating array, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the road collapse monitoring method based on grating array as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the road collapse monitoring method based on the grating array described in any one of claims 1 to 7 are implemented.

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