Laser detection device for pipeline positioning and method thereof

Abstract

The invention discloses a laser detection device for pipeline positioning, and the device comprises a sound source assembly which is used for applying a sound wave signal with a specific frequency to a pipeline buried underground; the laser vibration measurement assembly is arranged on the ground and used for detecting ground vibration caused when the sound wave signals penetrate through the pipe wall, penetrate through soil and other media and reach the ground; the laser vibration measurement assembly comprises a laser vibration measurement sensor, a focusing lens and a binocular camera; the laser vibration measurement sensor is used for emitting laser and adjusting a laser focus on the ground through the focusing lens. According to the invention, the binocular camera detects ground cloud information of a detected area, the ground is cleaned through the cleaning mechanism, then grids are divided, each grid is selected, a central point is selected as a laser measurement point, the laser vibration measurement sensor emits measurement laser, the measurement laser is focused in the laser measurement points in each grid through the focusing lens, and point-by-point scanning is carried out. And recording a result.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline positioning, and particularly to a laser detection device and method for pipeline positioning. Background Art

[0002] In the urban underground pipe network system, accurately detecting the path and position of underground pipelines is crucial for construction maintenance, fault troubleshooting, and safety assessment. At present, the commonly used underground pipeline path detection technology in the industry is mainly based on the acoustic detection principle. The specific method is to input and set acoustic signals at the pipeline connection in the inspection well of the pipeline, and collect the acoustic signals transmitted back to the ground through a high-sensitivity ground vibration sensor on the ground. After processing by a filtering algorithm and quantitative analysis based on the amplitude, the position and orientation of the pipeline are located.

[0003] However, the above traditional technology has the following significant defects:

[0004] Dependence on manual experience and limited accuracy: The propagation of acoustic signals in the formation is easily affected by soil properties, ambient noise, and pipeline materials, resulting in signal attenuation or distortion. Operators need to rely on subjective experience to judge the signal strength, and it is difficult to ensure the accuracy and consistency of the detection results.

[0005] Low efficiency: The method of manual point-by-point monitoring takes a long time. Especially in complex pipe networks or long-distance detection scenarios, the operation efficiency is low, and it is difficult to meet the needs of rapid detection of large-scale pipe networks.

[0006] Poor environmental adaptability: In noisy urban areas or deep pipeline scenarios, environmental noise will seriously interfere with signal acquisition, resulting in detection failure or increased errors.

[0007] Insufficient data recording and analysis: The traditional method lacks a systematic data recording and intelligent analysis function, and cannot realize the visual storage of detection results or comparison of historical data, which is not conducive to the long-term management and maintenance of the pipe network.

[0008] In view of the above problems, although attempts have been made to introduce auxiliary means such as electromagnetic detection or ground penetrating radar in the prior art, there are still deficiencies such as high cost, complex operation, or limited applicable scenarios. Therefore, there is an urgent need for a new type of underground pipeline path detection technology that is efficient, accurate, and adaptable to overcome the defects of the existing acoustic detection method and improve the intelligent level of pipe network operation and maintenance. Therefore, a laser detection device and method for pipeline positioning are proposed to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to provide a laser detection device and method for pipeline positioning in view of the above deficiencies.

[0010] To solve the above technical problems, the present invention adopts the following technical solutions: A laser detection device for pipeline positioning, comprising:

[0011] A sound source component for applying an acoustic wave signal of a specific frequency to a pipeline buried underground;

[0012] A laser vibration measurement component, arranged on the ground, for detecting the ground vibration caused when the acoustic wave signal passes through the pipe wall and penetrates through media such as soil to reach the ground;

[0013] The laser vibration measurement component includes a laser vibration measurement sensor, a focusing lens, and a binocular camera;

[0014] The laser vibration measurement sensor is used to emit a laser and adjust the laser focus on the ground through the focusing lens;

[0015] The binocular camera is used to measure the ground cloud information of the detected area;

[0016] A control unit for processing the ground cloud information and the feedback information of the laser vibration measurement sensor to judge the pipeline trend.

[0017] Furthermore, it further includes a bracket component and a moving component;

[0018] The bracket component is used to carry the laser vibration measurement sensor, the focusing lens, and the binocular camera;

[0019] The moving component is used to drive the bracket component to move to the ground of the detected area.

[0020] Furthermore, the bracket component includes a telescopic sleeve, one end of the telescopic sleeve is fixedly connected to the moving component, and the other end of the telescopic sleeve is provided with a support table;

[0021] The laser vibration measurement sensor, the focusing lens, and the binocular camera are arranged on the support table;

[0022] The telescopic sleeve is further provided with a height adjustment component for adjusting the height between the support table and the ground.

[0023] Furthermore, the moving component includes a support base, and a moving mechanism is arranged at the bottom of the support base;

[0024] A cleaning mechanism is further arranged inside the support base for clearing debris in the detected area.

[0025] Furthermore, the cleaning mechanism includes an air duct opened inside the support base, and a blower is arranged in the air duct;

[0026] An air inlet and an air outlet communicating with the air duct are further opened on the support base;

[0027] The blower is used to extract external air flow and act on the detected area.

[0028] Furthermore, a wind direction adjustment mechanism is also arranged in the air outlet.

[0029] The wind direction adjustment mechanism includes two groups of rotating disks rotatably arranged in the air outlet.

[0030] The rotating disk is transversely provided with an air flow channel, and an exhaust pipe corresponding to the air flow channel is also arranged on the rotating disk.

[0031] Adjusting engaging teeth that mesh with each other are arranged between the two groups of rotating disks to make the two groups of rotating disks rotate relatively or away from each other, so as to increase the cleaning area.

[0032] A driving unit that is drivingly connected to one of the groups of rotating disks is arranged on the support seat.

[0033] Furthermore, the sound source assembly includes a sound generating device arranged at the pipe connection and extending into the pipe.

[0034] Furthermore, the focusing lens is a three-dimensional focusing lens or a two-dimensional focusing lens.

[0035] The present invention adopts another technical solution: a use method of a laser detection device for pipeline positioning, including the following steps:

[0036] S1. Set the sound source assembly into the pipeline and emit sound information of different frequencies through the sound generating device.

[0037] S2. The laser vibration measurement assembly detects the sound information fed back in the current detection area and determines the optimal signal-to-noise ratio to determine the frequency of the sound generating device.

[0038] S3. The binocular camera detects the ground cloud information of the measured area and cleans the ground through the cleaning mechanism.

[0039] S4. For the area after measurement and cleaning, divide the grid, and select the center point of each grid as the laser measurement point.

[0040] S5. The laser vibration measurement sensor emits measurement laser and focuses it on the laser measurement points in each grid through the focusing lens, scans point by point, and records the results.

[0041] S6. The measured vibration data is finally integrated and spliced according to the image captured by the reference binocular camera, and finally a sound distribution cloud map is output. The pipeline trend route map can be directly given according to the cloud map distribution.

[0042] The beneficial effects of the present invention are reflected in:

[0043] In the present invention, a binocular camera detects the ground cloud information of the measured area, and the cleaning mechanism cleans the ground. Then, a grid is divided, and the center point of each grid is selected as the laser measurement point. The laser vibration sensor emits measurement laser and focuses it on the laser measurement points within each grid through a focusing lens, scans point by point, and records the results. The test vibration data is finally integrated and stitched according to the image captured by the reference binocular camera, and finally a sound distribution cloud map is output. According to the cloud map distribution, the pipeline trend route map can be directly given. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a perspective view of the present invention;

[0045] Figure 2 is a bottom view of the structure of the present invention;

[0046] Figure 3 is an implementation schematic diagram of the present invention;

[0047] Figure 4 is a schematic diagram of the wind direction adjustment mechanism structure of the present invention.

[0048] In the figure:

[0049] 1. Laser vibration sensor;

[0050] 2. Focusing lens;

[0051] 3. Binocular camera;

[0052] 4. Bracket assembly; 41. Support tabletop;

[0053] 5. Moving part; 51. Moving mechanism; 52. Air duct; 521. Air inlet; 53. Fan; 54. Wind direction adjustment mechanism; 541. Air flow channel; 542. Exhaust pipe; 543. Adjusting teeth;

[0054] 6. Sound generating device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments and features in the present application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] Please refer to Figures 1-4 , the present invention discloses a laser detection device for pipeline positioning, including:

[0057] A sound source component, the sound source component is used to apply a sound wave signal of a specific frequency to a pipe buried underground;

[0058] A laser vibration measuring assembly is provided on the ground to detect ground vibrations caused by the acoustic wave signal passing through the pipe wall, soil or other media and reaching the ground;

[0059] The laser vibration measurement assembly includes a laser vibration measurement sensor 1, a focusing lens 2 and a binocular camera 3;

[0060] The laser vibration sensor 1 is used to emit laser light and adjust the laser focus on the ground through the focusing lens 2;

[0061] The binocular camera 3 is used to measure the ground cloud information of the detected area, and is also used to detect the height between the laser vibrometer sensor 1, the focusing lens 2 and the ground, so that the focusing lens 2 can adjust the focus of the laser vibrometer sensor 1 to focus on the ground;

[0062] A control unit is used to process the ground cloud information and the feedback information of the laser vibration sensor 1 to determine the pipeline trend.

[0063] It should be further explained that it also includes a bracket assembly 4 and a moving part 5;

[0064] The bracket assembly 4 is used to carry the laser vibration sensor 1, the focusing lens 2 and the binocular camera 3;

[0065] The movable part 5 is used to drive the bracket assembly 4 to move to the ground of the detected area. It should be noted that the movable part 5 and the bracket assembly 4 are combined in a Z shape, so that the laser vibration sensor 1, focusing lens 2 and binocular camera 3 on the bracket assembly 4 can measure the ground information in the area to be measured in front of the movable part 5.

[0066] In another preferred embodiment, the support assembly 4 may be a triangular support frame in the prior art.

[0067] It should be further explained that the bracket assembly 4 includes a telescopic sleeve, one end of which is fixedly connected to the moving component 5, and the other end of which is provided with a support table 41;

[0068] The laser vibration sensor 1, focusing lens 2 and binocular camera 3 are arranged on a supporting table 41;

[0069] The telescopic sleeve is also provided with a height adjustment component for adjusting the height between the support table 41 and the ground. The height adjustment component and the telescopic sleeve allow the support table 41 to be adjusted in height as a whole to adapt to the needs of different users and improve the convenience of the equipment.

[0070] Furthermore, the moving component 5 includes a support base, and a moving mechanism 51 is provided at the bottom of the support base;

[0071] The support seat is also provided with a cleaning mechanism for clearing debris in the detected area.

[0072] It should be further explained that the cleaning mechanism includes an air duct 52 opened in the support base, and a fan 53 is provided in the air duct 52;

[0073] The support base is also provided with an air inlet 521 and an air outlet connected to the air duct 52;

[0074] The fan 53 is used to draw external airflow to act on the detected area.

[0075] Through the above-mentioned structural setting, before the laser vibration measurement component detects the ground in the area to be measured, the cleaning mechanism can clean up interference objects such as garbage, fallen leaves, gravel and dust on the ground surface to prevent them from blocking the laser and affecting the detection results of the laser vibration measurement component.

[0076] In a preferred embodiment, a wind direction adjustment mechanism 54 is further provided in the air outlet;

[0077] The wind direction adjustment mechanism 54 includes two sets of rotating disks rotatably arranged in the air outlet;

[0078] The rotating disk is provided with an air flow channel 541 in the horizontal direction, and an exhaust pipe 542 corresponding to the air flow channel 541 is also provided on the rotating disk;

[0079] Between the two groups of rotating disks, there are provided mutually meshing adjustment teeth 543 for rotating the two groups of rotating disks relative to or apart from each other to increase the cleaning area.

[0080] The support seat is provided with a driving unit which is transmission-connected to one group of the rotating disks.

[0081] Through the above-mentioned structural setting, the wind direction adjustment mechanism 54 can drive the two sets of rotating disks with air outlets to rotate relative to or apart from each other, thereby sweeping and blowing the ground of the area to be tested opposite thereto, achieving an efficient cleaning effect.

[0082] Finally, it should be noted that the sound source assembly includes a sound-generating device 6 arranged at the pipe connection and extending into the pipe. The sound-generating device 6 and the connection method with the pipe are commonly used technical means in the prior art, so they are not explained and described in detail.

[0083] The present invention adopts another technical solution: a method for using a laser detection device for pipeline positioning, comprising the following steps:

[0084] S1. Place the sound source component in the pipe and emit sound information of different frequencies through the sound generating device 6;

[0085] S2. The laser vibration measurement component detects the sound information fed back in the current detection area and determines the optimal signal-to-noise ratio to determine the frequency of the sound-generating device 6;

[0086] S3, binocular camera 3 detects the ground cloud information of the measured area and cleans the ground through the cleaning mechanism;

[0087] S4. Divide the area after measurement and cleaning into grids, and select the center point of each grid as the laser measurement point;

[0088] S5, the laser vibration sensor 1 emits a measuring laser and focuses it on the laser measuring points in each grid through the focusing lens 2, scans point by point, and records the results;

[0089] S6. The test vibration data is finally integrated and spliced according to the image captured by the reference binocular camera 3, and the sound distribution cloud map is finally output. According to the distribution of the cloud map, a pipeline route map can be directly given.

[0090] In step S1-2 of the above method, since the soil properties of different sites to be tested are different, in order to obtain the best signal-to-noise ratio and ensure measurement accuracy, the above test needs to be performed before the test;

[0091] Secondly, in step S3, based on the ground cloud information fed back by the binocular camera 3, it is determined whether there is interference with foreign objects on the ground. If interference is determined, the cleaning mechanism can be activated to clean the foreign objects to ensure the subsequent detection process;

[0092] Finally, the control unit divides the ground cloud information fed back by the binocular camera 3 into grids, controls the laser vibration sensor 1 to emit a measuring laser and focus it through the focusing lens 2 on the laser measurement points within each grid, scans point by point, and records the results. Finally, the results are compared and finally integrated and spliced. According to the cloud map distribution, a pipeline route map can be directly generated.

[0093] It should be added that, during the detection of the corresponding area, the positions of the laser vibrometer sensor 1 and the focusing lens 2 are fixed. However, for laser measurement points in different grids, the focusing lens 2 can be adjusted to guide the focus of the laser emitted by the laser vibrometer sensor 1 to be located in different grids for laser measurement.

[0094] It should be noted that the focusing lens is a three-dimensional focusing lens or a two-dimensional focusing lens. For a small area to be measured, such as when the vibration is vertically downward, only a two-dimensional focusing lens can be used for measurement, while for a large area, a three-dimensional focusing lens is required to adjust the focal length.

[0095] In step 6, the image integration and stitching technology is a conventional technical means in the prior art, which can combine multiple small pictures obtained by the binocular camera 3 into a complete scene picture, and the control unit can display it in the complete scene picture according to the feedback of the sound vibration in each of the above regions.

[0096] Compared with the deficiencies in the prior art such as high cost, complex operation or limited applicable scenarios, the above method proposes a new underground pipeline path detection technology that is efficient, accurate and highly adaptable, overcomes the defects of the existing acoustic detection methods, and improves the intelligent level of pipeline network operation and maintenance.

[0097] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0098] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0099] In addition, "a plurality" means two or more.

[0100] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser detection device for pipeline positioning, characterized in that, Comprising: A sound source component for applying an acoustic wave signal of a specific frequency to a pipeline buried underground; A laser vibration measurement component disposed on the ground for detecting the ground vibration caused when the acoustic wave signal passes through the pipe wall and penetrates through media such as soil to reach the ground; The laser vibration measurement component includes a laser vibration measurement sensor (1), a focusing lens (2), and a binocular camera (3); The laser vibration measurement sensor (1) is used to emit laser light and adjust the laser focus on the ground through the focusing lens (2); The binocular camera (3) is used to measure the ground cloud information of the detected area; A control unit for processing the ground cloud information and the feedback information of the laser vibration measurement sensor (1) to judge the pipeline trend.

2. The laser detection device for pipeline positioning according to claim 1, wherein: It further includes a bracket component (4) and a moving component (5); The bracket component (4) is used to carry the laser vibration measurement sensor (1), the focusing lens (2), and the binocular camera (3); The moving component (5) is used to drive the bracket component (4) to move to the ground of the detected area.

3. The laser detection device for pipeline positioning according to claim 2, wherein: The bracket component (4) includes a telescopic sleeve. One end of the telescopic sleeve is fixedly connected to the moving component (5), and the other end of the telescopic sleeve is provided with a support tabletop (41); The laser vibration measurement sensor (1), the focusing lens (2), and the binocular camera (3) are disposed on the support tabletop (41); The telescopic sleeve is further provided with a height adjustment component for adjusting the height between the support tabletop (41) and the ground.

4. The laser detection device for pipeline positioning according to claim 2, wherein: The moving component (5) includes a support base, and a moving mechanism (51) is disposed at the bottom of the support base; A cleaning mechanism is further disposed inside the support base for cleaning debris in the detected area.

5. The laser detection device for pipeline positioning according to claim 4, wherein: The cleaning mechanism includes an air duct (52) opened in the support base, and a blower (53) is disposed in the air duct (52); An air inlet (521) communicating with the air duct (52) and an air outlet are further opened on the support base; The blower (53) is used to extract external air flow and act on the detected area.

6. The laser detection device for pipeline positioning according to claim 5, characterized in that: A wind direction adjustment mechanism (54) is further disposed inside the air outlet; The wind direction adjustment mechanism (54) includes two groups of rotating disks rotatably disposed inside the air outlet; The rotating disk is transversely provided with an air flow channel (541), and an exhaust pipe (542) corresponding to the air flow channel (541) is further disposed on the rotating disk; Adjusting engaging teeth (543) meshing with each other are disposed between the two groups of rotating disks for relatively rotating or separating the two groups of rotating disks to increase the cleaning area; A driving unit is disposed on the support base and is in transmission connection with one of the groups of rotating disks.

7. The laser detection device for pipeline positioning according to claim 1, wherein: The sound source component includes a sound generating device (6) disposed at the pipeline connection and extending into the pipe.

8. The laser detection device for pipeline positioning according to claim 1, wherein: The focusing lens (2) is a three-dimensional focusing lens or a two-dimensional focusing lens.

9. The method of using a laser detection device for pipeline positioning according to any one of claims 1-8, characterized in that, Including the following steps: S1. Set the sound source component into the pipeline and emit sound information of different frequencies through the sound generating device (6); S2. The laser vibration measurement component detects the sound information fed back in the current detection area and determines the optimal signal-to-noise ratio to determine the frequency of the sound generating device (6); S3. The binocular camera (3) detects the ground cloud information of the area to be measured, and the cleaning mechanism is used to clean the ground; S4. For the area after measurement and cleaning, grids are divided, and the center point of each grid is selected as the laser measurement point; S5. The laser vibration sensor (1) emits measurement laser, which is focused on the laser measurement points in each grid through the focusing lens (2), scanned point by point, and the results are recorded; S6. The measured vibration data is finally integrated and spliced according to the images taken by the reference binocular camera (3), and finally the sound distribution cloud map is output. The pipeline trend route map can be directly given according to the cloud map distribution.

Images