Bridge underwater pile pier structure defect depth detection device based on laser scanning

Abstract

The utility model relates to a bridge underwater pile pier structure defect depth detection device based on laser scanning, which comprises a laser scanner and a driving unit which is connected with the laser scanner and drives the laser scanner to slide with an annular first guide rail, a second guide rail which vertically extends to allow the first guide rail to slide is fixedly arranged on the inner wall of the detection frame, a lead screw is vertically arranged in the second guide rail and drives the first guide rail to slide through the lead screw, the detection frame and the first guide rail are each formed by combining two sets of half frames and two sets of half rings, and the detection end of the laser scanner faces the axis of the first guide rail; the depth data of the apparent defect part of the pier is obtained through the laser scanning device, accurate quantitative recognition and depth measurement can be carried out on the apparent defect of the pier, and reliable data support is provided for structural safety evaluation and maintenance of the pier.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering field, it is a kind of bridge underwater pile pier structure defect depth detection device based on laser scanning. BACKGROUND

[0002] Pier is the important component of bridge structure to bear and transfer load, and is directly related to the safety and service life of the whole bridge. However, the pier is affected by natural environment, load and external damage and other factors during long-term service, and cracks, spalling, cavities and other defects are easily generated on the surface of the pier. If the depth and shape of the defects cannot be found and accurately detected in time, and then a precise numerical model is established to evaluate its safety, the pier bearing capacity will be reduced, and the whole bridge structure will be damaged and collapsed.

[0003] At present, the detection of pier defects mostly adopts traditional manual detection or qualitative detection technology. These methods are often difficult to accurately measure the depth and shape of the defects, and cannot fully reflect the damage of the pier, resulting in deviation in subsequent safety evaluation. In addition, the traditional detection method is low in efficiency, and the safety of the detection personnel cannot be guaranteed, which affects the timeliness and accuracy of bridge maintenance. Therefore, a high-precision depth detection technology for pier defects is urgently needed to improve the accuracy of defect identification and the reliability of subsequent safety evaluation. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a bridge underwater pile pier structure defect depth detection device based on laser scanning, which not only has a reasonable structure, but also can quickly and accurately identify the apparent defects of the pier and measure the depth thereof, to provide reliable data support for the maintenance and safety evaluation of the bridge.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a bridge underwater pile pier structure defect depth detection device based on laser scanning, comprising a laser scanner 1, a driving unit 3 connected with the laser scanner and driving the laser scanner to slide with a ring-shaped first guide rail 2, the first guide rail is vertically slidingly connected in a detection frame 4, a second guide rail 5 vertically extending for the sliding of the first guide rail is fixed on the inner wall of the detection frame, a lead screw 6 is vertically arranged in the second guide rail and drives the first guide rail to slide, the lead screw is rotationally connected in the second guide rail and the end portion is driven to rotate by a motor, the detection frame and the first guide rail are respectively formed by two groups of half frames 7 and two groups of half rings 8, a locking assembly 9 is arranged between the two groups of half frames to lock and combine, and the detection end of the laser scanner faces the axis of the first guide rail.

[0006] Further, the first guide rail is spaced with several sliding blocks 10 along its outer periphery, the sliding blocks are all U-shaped and two ends are arranged on two sides of the second guide rail respectively.

[0007] Further, the second guide rail is provided with four groups, and the four groups of sliding blocks are arranged one by one, wherein only two groups of second guide rails away from the locking assembly are provided with lead screws, and the two second guide rails are provided with sliding grooves 12 for the lead screw nut 11 to pass out to connect the sliding block.

[0008] Further, the locking assembly comprises a buckle 13 rotatably connected to one of the half frames, the buckle is provided with a through hole 14, and the other half frame is provided with a screw hole 15 for the lock buckle or bolt to pass through to lock.

[0009] Further, the detection frame is provided with a buckle and a screw hole at the upper and lower ends.

[0010] Further, the driving unit comprises a driving frame 16, the driving frame is rotatably connected with a driving wheel 17 sliding along the track of the first guide rail, and the laser scanner is fixedly connected to the driving frame.

[0011] Further, the half ring is in semicircular arc shape, and the butt joint of the two groups of half rings corresponds to the U-shaped opening of the two sliding blocks, that is, the two groups of half rings are spliced and the U-shaped opening of the sliding block is transversely passed through by the bolt 18 to be fastened.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the laser scanner is used for checking the apparent damage of the bridge pier to be detected, the driving unit and the lead screw drive the laser scanner to move in the circumferential direction and the vertical direction respectively, so that the apparent defect of the bridge pier is more comprehensively detected, and the detection efficiency is improved compared with artificial observation detection.

[0013] The utility model will be explained in further detail in combination with the drawings and specific embodiments. DRAWINGS

[0014] Fig. 1 It is the structure schematic view of the embodiment of the utility model;

[0015] Fig. 2 It is the structure schematic view of the driving unit in the embodiment of the utility model;

[0016] Fig. 3 It is the connection schematic view of the lead screw in the embodiment of the utility model;

[0017] In the figure: 1-laser scanner, 2-first guide rail, 3-driving unit, 4-detection frame, 5-second guide rail, 6-screw rod, 7-half frame, 8-half ring, 9-locking assembly, 10-sliding block, 11-screw nut, 12-sliding groove, 13-buckle, 14-through hole, 15-screw hole, 16-driving frame, 17-driving wheel, 18-bolt. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following specific examples are given, and the detailed description is as follows with the help of the drawings.

[0019] As Figs. 1-3 shown, a bridge underwater pile pier structure defect depth detection device based on laser scanning, including laser scanner 1 and with laser scanner connection and drive its with annular first guide rail 2 sliding driving unit 3, the first guide rail vertical sliding connection in a detection frame 4, the detection frame inner wall on the vertical extension for the first guide rail sliding second guide rail 5 is fixed, the second guide rail is vertically arranged with screw rod 6 and drive the first guide rail sliding, the screw rod rotation is connected in the second guide rail and the end is driven by motor rotation, the detection frame and the first guide rail are respectively formed by two groups of half frame 7, two groups of half ring 8 combination, two groups of half frame are provided with locking assembly 9 for combination locking, the detection end of the laser scanner is towards the axis of the first guide rail. Laser scanner can move along the first guide rail annular direction to detect the damage of the pile pier surface.

[0020] In the embodiment of the utility model, the first guide rail is uniformly distributed with several sliding blocks 10 along its outer periphery, and the sliding blocks are U-shaped and arranged at both ends of the second guide rail respectively.

[0021] In the embodiment of the utility model, the second guide rail is provided with four groups, and four groups of sliding blocks are provided correspondingly, wherein only two groups of second guide rails away from the locking assembly are provided with screw rods, and the two second guide rails are provided with sliding grooves 12 for the screw nuts 11 to pass out to connect the sliding blocks.

[0022] In the embodiment of the utility model, the locking assembly comprises a buckle 13 rotationally connected to one of the half frames, the buckle is provided with a through hole 14, and the other half frame is provided with a screw hole 15 for the lock or bolt to pass through to lock.

[0023] In the embodiment of the utility model, the detection frame is provided with a buckle and a screw hole at the upper and lower ends.

[0024] In the embodiment of the utility model, the driving unit comprises a driving frame 16, the driving frame is rotationally connected with a driving wheel 17 sliding along the track of the first guide rail, and the laser scanner is fixedly connected to the driving frame.

[0025] In the embodiment of the utility model, the half ring is semicircular, and the butt joint of the two groups of half rings corresponds to the U-shaped opening of the two sliders, that is, the U-shaped opening of the sliders is crossed by the bolts 18 after the two groups of half rings are spliced to fasten.

[0026] The laser scanner performs laser dotting, measures the distance value from the laser scanner to the laser dotting, and detects the apparent defect depth of the pier through the distance value measured by the laser dotting.

[0027] The laser dotting measurement technology, especially the method based on point laser, provides an effective solution for measuring the defect depth of the apparent defect of the pier. By using the point laser technology to measure the apparent defect of the pier, the complex three-dimensional structure problem is simplified to a two-dimensional depth problem for processing. Combined with the defect depth information and the area recognition technology, the size information parameters of the defect contour can be measured, and then the two-dimensional model of the apparent defect of the pier can be analyzed. Not only the accuracy and efficiency of the detection are improved, but also the method can be effectively applied to the field of bridge detection to solve the problems that cannot be solved by traditional detection methods. In addition, for the detection of the size deviation of the pier defect, the two-dimensional laser dotting measurement technology can be used for non-contact measurement. Through scanning the apparent defect of the pier, the laser dotting data can be obtained, and after processing, the size information of the pier and the two-dimensional features of the apparent defect can be obtained, so that the size deviation can be evaluated. This method avoids the error of manual measurement and improves the efficiency and accuracy of detection. The laser dotting measurement technology, especially combined with the two-dimensional laser dotting technology, provides an efficient and accurate solution for the detection of the apparent defect of the pier, which is of great significance for ensuring the safety of the bridge and prolonging its service life.

[0028] The working process of the pier detection device of the embodiment is as follows: first, the device is unlocked and the buckle is opened, and then the device is hoisted to the two sides of the pier to be detected, and the two sides are closed to each other to enclose the pier, and then the buckle is locked. At this time, the first guide rail is sleeved on the pier. The laser scanner is turned on to perform laser dotting on the apparent defect of the pier, and the driving unit is turned on to drive the laser scanner to move along the annular first guide rail (around the outer periphery of the pier). At the same time, the screw rod is turned on to drive the first guide rail to move in the up-down direction. Under the action of the driving unit and the screw rod, the laser scanner can more comprehensively scan the apparent defect of the pier to obtain the depth detection data of the apparent defect of the pier structure.

[0029] The utility model is not limited to the above best embodiment, and anyone can derive other various forms of bridge underwater pier structure defect depth detection device based on laser scanning under the inspiration of the utility model. Any equivalent changes and modifications made within the scope of the utility model application patent shall be within the scope of the utility model.

Claims

1. A laser scanning-based device for detecting the depth of defects in underwater bridge pile pier structures, characterized in that: The device includes a laser scanner and a drive unit connected to the laser scanner and driving it to slide along a first annular guide rail. The first guide rail is vertically slidably connected within a detection frame. A second guide rail is fixed on the inner wall of the detection frame, extending vertically to allow the first guide rail to slide. A lead screw is vertically arranged within the second guide rail and drives the first guide rail to slide. The detection end of the laser scanner faces the axis of the first guide rail.

2. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 1, characterized in that: The detection frame and the first guide rail are respectively formed by combining two sets of half frames and two sets of half rings, and a locking component for combining and locking is provided between the two sets of half frames.

3. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 2, characterized in that: The first guide rail has several sliders evenly distributed at intervals along its outer periphery. The sliders are all U-shaped and their two ends are respectively located on both sides of the second guide rail.

4. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 3, characterized in that: The second guide rail is provided in four sets, and the corresponding slider is provided in four sets. Only the two sets of second guide rails away from the locking component are provided with lead screws. The two second guide rails are provided with grooves for the lead screw nut to pass through to connect with the slider.

5. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 2, characterized in that: The locking assembly includes a buckle rotatably connected to one half of the frame, the buckle having a through hole, and a screw hole on the other half of the frame for a buckle or bolt to pass through for locking.

6. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 5, characterized in that: The detection frame is equipped with buckles and screw holes at both the top and bottom.

7. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 1, characterized in that: The drive unit includes a drive frame, to which a drive wheel is rotatably connected and slides along the first guide rail track. The laser scanner is fixedly connected to the drive frame.

8. The device for detecting the depth of defects in underwater bridge pile piers based on laser scanning according to claim 3, characterized in that: The semi-circular ring is semi-circular in shape, and the joint of the two sets of semi-circular rings corresponds to the U-shaped opening of the two sliders. That is, after the two sets of semi-circular rings are spliced, they are fastened by bolts passing through the U-shaped opening of the sliders.

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