A method for evaluating damage effectiveness of a barrier wall

Abstract

The application discloses a kind of methods for evaluating the damage effectiveness of a barrier wall, comprising the following steps: step 1: set the scanning reference point A, the projection reference point O and the reset reference point; Step 2: set the scanning start line S1 and the scanning termination line S2; Step 3: use laser radar to scan back and forth between the scanning reference point A and the scanning start line S1, and obtain the position of the left end point B of the barrier wall; Step 4: raise / lower the height of the laser radar in the vertical direction, then scan back and forth between the scanning start line S1 and the scanning termination line S2, obtain the position of the left end point D and the right end point E of the channel formed after the barrier wall is damaged, and the size of the channel, and use the scanned data to build a three-dimensional model of the barrier wall; Step 5: combine the size of the channel after the barrier wall is damaged, the barrier breaking process, and the number of equipment and materials used for barrier breaking to accurately evaluate the damage effectiveness of the barrier wall. This method realizes the accurate collection of the barrier wall and its damage data, and has better environmental adaptability than image collection.

Description

Technical Field

[0001] This invention relates to the field of barrier wall damage assessment, and more particularly to a method for assessing barrier wall damage effectiveness. Background Technology

[0002] Barrier walls are typically constructed of stone, cement, and other materials, and are built around fortifications on coastlines or high ground where landings are convenient and the shoreline is relatively gentle. Their primary purpose is to impede infantry movement, but they can also hinder the passage of armored vehicles. Aerial bombs, bombs, anti-tank rockets, and obstacle-clearing munitions are commonly used to create passageways within the barrier walls that meet the needs of personnel and equipment.

[0003] The current method for assessing damage to barrier walls involves capturing images of the barrier wall in real time and using image processing and pattern recognition algorithms to calculate the location and size of the passage, thereby assessing whether the damaged passage meets the needs of personnel and vehicles. The disadvantage of this method is that image acquisition is greatly affected by factors such as weather, and the timing of its use is limited. Summary of the Invention

[0004] The purpose of this invention is to provide a method for evaluating the damage performance of a barrier wall.

[0005] The innovation of this invention lies in the use of a single-line lidar combined with motion mechanism composite control to achieve precise acquisition of data on the barrier wall and its damage. Compared with image acquisition, it has better environmental adaptability. By using digital twin technology to realize a digital twin of the barrier wall and its damage process, the damage performance assessment is more accurate and scientific.

[0006] To achieve the above-mentioned objectives, the technical solution of this invention is as follows:

[0007] A method for assessing the damage effectiveness of a barrier wall includes the following steps:

[0008] Step 1: Set the scanning reference point A, the projection reference point O, and the reset reference point; the scanning reference point A is a point to the left of the left end point B of the barrier wall; the projection reference point O is the perpendicular point of the laser radar location C on the barrier wall.

[0009] Step 2: Set the scan start line S1 and scan end line S2; the scan start line S1 and scan end line S2 are respectively located on the two sides of the barrier wall after the barrier wall is damaged.

[0010] Step 3: Use a lidar to scan back and forth between the scanning reference point A and the scanning starting line S1 to obtain the position of the left end point B of the barrier wall;

[0011] Step 4: Raise / lower the height of the lidar vertically, and then scan back and forth between the scanning start line S1 and the scanning end line S2 to obtain the position and channel size of the left end point D and the right end point E of the channel formed after the barrier wall is damaged. Then, use the scan data to create a three-dimensional model of the barrier wall to realize a digital twin of the barrier wall and the damage process.

[0012] Step 5: Combine data on the dimensions of the passage after the barrier wall is damaged, the progress of the breach, and the quantity of equipment and materials used for breaching to accurately assess the effectiveness of the barrier wall breach.

[0013] Furthermore, in step 1, the distance between the projection reference point O and the lidar is L. OC 1m <L OC <50m.

[0014] Further, the specific method of step 3 is as follows: use a lidar to scan back and forth N times between the first reference point A and the scanning start line S1, where N>=3 and N is a natural number; analyze the distance data acquired by the lidar and perform low-pass filtering to remove abnormal distance values ​​caused by external environmental interference. When the distance changes abruptly, it is considered that point B has been scanned.

[0015] Furthermore, the specific method for obtaining the positions of the left endpoint D and the right endpoint E of the channel and the channel size in step 4 is as follows: During the scanning process, after each scanning cycle is completed, L is calculated respectively. OC The values ​​of ∠BOC, ∠COD, and ∠COE are used to calculate the distance L between points D and E and point B. BD =L OC ×(tan∠BOC+tan∠COD), L BE =L OC ×(tan∠BOC+tan∠COE), thus obtaining the positions of the channel endpoints D and E on the barrier wall and the channel dimensions.

[0016] The beneficial effects of this invention are:

[0017] Using lidar to acquire data on barrier walls offers better environmental adaptability compared to image acquisition. Digital twin technology enables the creation of a digital twin of the barrier wall and its damage process, resulting in more accurate and scientific damage performance assessment. It also facilitates post-event review and analysis, supporting equipment application research, training, and assessment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the invention.

[0019] Figure 2 Screenshot of the touchscreen setup interface.

[0020] In the diagram: 10 is the lidar, 20 is the control terminal, 30 is the host computer, 40 is the barrier wall, and 50 is the channel. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0022] A method for assessing the damage effectiveness of a barrier wall includes the following steps:

[0023] Step 1: Set the scanning reference point A, projection reference point C, and reset reference point; the scanning reference point A is a point to the left of the left end point B of the barrier wall 40; the projection reference point C is the perpendicular point of the location O of the lidar 10 on the barrier wall 40; the scanning reference point A only needs to be to the left of point B; the reset reference point is the point that the lidar 10 is aligned with during reset, and generally the reset reference point is a point that is different from the scanning reference point A and the projection reference point C.

[0024] Step 2: Set the scan start line S1 and scan end line S2; the scan start line S1 and scan end line S2 are respectively located on the two sides of the barrier wall 40 after it is damaged; specifically, the distance from point B to S1 is not greater than the length of the barrier wall 40 multiplied by 0.2; the distance from point B to S2 is not less than the length of the barrier wall 40 multiplied by 0.8.

[0025] Step 3: Use the lidar 10 to scan back and forth between the scanning reference point A and the scanning start line S1 to obtain the position of the left end point B of the barrier wall 40;

[0026] Step 4: Raise / lower the height of the LiDAR 10 vertically. After raising / lowering, reciprocate between the scanning start line S1 and the scanning end line S2 to obtain the position of the left endpoint D and the right endpoint E of the channel 50 formed after the barrier wall 40 is damaged, as well as the size of the channel 50. Then, use the scanned data to create a 3D model of the barrier wall 40, realizing a digital twin of the barrier wall 40 and the damage process. Specifically, the height of the rise / fall can be set to the height of the barrier wall 40 multiplied by 0.3. After setting, the LiDAR 10 rotates to scan and acquire data.

[0027] Step 5: Combine the dimensions of the passage 50 after the barrier wall 40 is destroyed, the progress of the breach, and the quantity of equipment and materials used for the breach to achieve an accurate assessment of the barrier wall's destruction effectiveness.

[0028] Furthermore, in step 1, the distance between the projection reference point C and the lidar 10 is L. OC 1m <L OC <50m.

[0029] Further, the specific method of step 3 is as follows: use the lidar 10 to scan back and forth N times between the first reference point A and the scanning start line S1, where N>=3 and N is a natural number; analyze the distance data acquired by the lidar and perform low-pass filtering to remove abnormal distance values ​​caused by external environmental interference. When the distance changes abruptly, it is considered that point B has been scanned.

[0030] Furthermore, the specific method for obtaining the positions of the left endpoint D and the right endpoint E of the channel and the channel size in step 4 is as follows: During the scanning process, after each scanning cycle is completed, L is calculated respectively. OC The values ​​of ∠BOC, ∠COD, and ∠COE are used to calculate the distance L between points D and E and point B. BD =L OC ×(tan∠BOC+tan∠COD), L BE =L OC ×(tan∠BOC+tan∠COE), thereby obtaining the position of the channel endpoints D and E on the barrier wall and the channel size. Specifically, one cycle refers to S1 to S2 or S2 to S1.

[0031] Furthermore, the lidar 10 is mounted on a bracket (motion mechanism). This bracket can move the lidar vertically or rotate it 360 degrees horizontally, enabling both vertical movement and horizontal rotation. After mounting the lidar 10, the data scanned by the lidar 10 is sent to the control terminal 20 using the aforementioned method. The control terminal 20 includes a touchscreen and a controller. Users can perform specific operations via the touchscreen, such as resetting, controlling the lidar 10's lifting and rotation, and setting specific parameters. The specific settings interface is shown below. Figure 2 As shown, after obtaining specific data, the control terminal 20 sends it to the host computer 30, where the host computer 30 performs specific calculations on the digital twin of the barrier wall and its damage effectiveness.

[0032] The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A method for evaluating the damage effectiveness of a barrier wall, characterized in that: Includes the following steps: Step 1: Set the scanning reference point A, the projection reference point C, and the reset reference point; the scanning reference point A is a point to the left of the left end point B of the barrier wall; the projection reference point C is the perpendicular point of the laser radar position O on the barrier wall. Step 2: Set the scan start line S1 and scan end line S2; the scan start line S1 and scan end line S2 are respectively located on the two sides of the barrier wall after the barrier wall is damaged. Step 3: Use a lidar to scan back and forth between the scanning reference point A and the scanning starting line S1 to obtain the position of the left end point B of the barrier wall; Step 4: Raise / lower the height of the lidar vertically. After raising / lowering, reciprocate the scan between the starting line S1 and the ending line S2 to obtain the position and dimensions of the left endpoint D and right endpoint E of the channel formed after the barrier wall is damaged. Use the scan data to create a 3D model of the barrier wall, achieving a digital twin of the barrier wall and the damage process. The specific method for obtaining the position and dimensions of the left endpoint D and right endpoint E is as follows: During the scanning process, after each scan cycle is completed, calculate L... OC The values ​​of ∠BOC, ∠COD, and ∠COE are used to calculate the distance L between points D and E and point B. BD =L OC ×(tan∠BOC+tan∠COD), L BE =L OC ×(tan∠BOC+tan∠COE), thereby obtaining the positions of the channel endpoints D and E on the barrier wall and the channel dimensions; Step 5: Combine data on the dimensions of the passage after the barrier wall is damaged, the progress of the breach, and the quantity of equipment and materials used for breaching to accurately assess the effectiveness of the barrier wall breach.

2. The method for evaluating the damage effectiveness of a barrier wall according to claim 1, characterized in that: In step 1, the distance from the projection reference point C to the lidar is L. OC 1m <L OC <50m.

3. The method for evaluating the damage effectiveness of a barrier wall according to claim 1, characterized in that: The specific method of step 3 is as follows: use a lidar to scan back and forth N times between the first reference point A and the scanning start line S1, where N>=3 and N is a natural number; analyze the distance data acquired by the lidar and perform low-pass filtering to remove abnormal distance values ​​caused by external environmental interference. When the distance changes abruptly, it is considered that point B has been scanned.

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