1. A hand-held structural appearance crack measuring device, comprising:

the telescopic support (1), the beginning of the telescopic support (1) can axially extend and retract relative to the end;

the shooting module (2) is arranged at the tail end of the telescopic support (1) and can acquire an apparent crack image of the structure of the target area within a specific shooting distance range;

the image processing module (3) is arranged at the starting end of the telescopic support (1), the image processing module (3) is electrically connected with the shooting module (2), and the image processing module (3) is used for extracting apparent crack characteristics of the structure apparent crack image in a target range acquired by the image acquisition module (3), numbering and storing the apparent crack characteristics, and uploading the apparent crack characteristics to a structure crack characteristic information database of a user end in a wireless communication mode;

the distance measurement module is arranged on the shooting module (2), the distance measurement module is electrically connected with the image processing module (3), the distance measurement module acquires the distance between the shooting module (2) and the area to be detected in real time and transmits the distance to the image processing module (3) in real time, and when the distance between the shooting module (2) and the area to be detected is within a preset threshold range, the image processing module (3) instructs the shooting module (2) to adjust the focal length adaptively, so that each acquired picture has the same resolution precision.

2. The apparatus for measuring apparent crack of a hand-held structure as claimed in claim 1, wherein the telescopic support (1) is an electrically driven telescopic rod.

3. The apparatus according to claim 1, wherein the image processing module (3) comprises a processing module housing (31) and a microprocessor disposed inside the housing, and the image processing module (3) further comprises a RAM, a ROM and a wireless signal transceiver electrically connected to the microprocessor via a bus.

4. The hand-held structural appearance crack measuring device of claim 3, wherein the housing (31) is further provided with an operation panel (32) and a display screen (33), and the operation panel (32) and the display screen (33) are electrically connected with the microprocessor through a bus.

5. The apparatus of claim 3, wherein the ranging module comprises at least one laser ranging sensor electrically connected to the microprocessor via a bus.

6. The apparatus for measuring apparent crack of a handheld structure as claimed in claim 3, wherein the telescopic support (1) is a multi-section electric cylinder structure, a driving motor of the multi-section electric cylinder structure is electrically connected to the microprocessor, and the servo control of the microprocessor is used to realize constant-speed extension and contraction of the multi-section electric cylinder structure.

7. The apparatus according to claim 6, wherein the end of the multi-section cylinder structure is electrically connected to the camera module (2), and the beginning of the multi-section cylinder structure is fixedly connected to the processing module housing (31).

8. The apparatus of claim 1, wherein the camera module (2) comprises an industrial camera (21) and a light-emitting unit (22), and the light-emitting unit (22) is disposed around the industrial camera (21) to form a uniform circumferential illumination assistance.

9. The apparatus of claim 8, wherein the industrial camera (21) is configured to acquire the image with an accuracy of 0.01mm or more.

10. The apparatus of claim 2, wherein the rod of the electrical telescopic rod is made of carbon fiber.

Background

The existing bridge body structure has crack damage on the surface of the structure due to construction errors, transportation loss, repeated loading of vehicle load and the like in the construction, transportation and whole operation periods, so that the overall durability and safety of the structure are affected.

The traditional method mainly depends on a manual visual inspection mode and numbers and marks the discovered cracks, the method is low in efficiency, time-consuming, labor-consuming and strong in subjectivity, and missing detection and error detection are easy to generate due to poor lighting conditions in the box girder.

CN207662806U discloses a hand-held bridge apparent disease detection device, which comprises a three-wheel walking trolley, a telescopic rod piece, an industrial camera, a linear high-strength light supplementing system and a host, wherein the telescopic rod piece consists of three telescopic arms and a handle; the end part of the first section of telescopic arm is connected with the three-wheel walking trolley, the linear high-strength light supplementing system is arranged on the first section of telescopic arm, and the linear high-strength light supplementing system is controlled by the host machine to work; the handle is arranged at the end part of the third telescopic arm, the industrial camera is arranged on the handle, and the shooting speed of the industrial camera is controlled by the host; and the shooting surface of the industrial camera and the light emitted by the linear high-strength light supplementing system irradiate in the area to be scanned. The technical scheme can only realize the acquisition of the disease information of the surface of the flat structure, and is difficult to be applied to narrow space and irregular plane.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and provides a handheld structural appearance crack measuring device, which can obtain crack information of a structural surface at a narrow space and an irregular plane by an operation of a user.

The purpose of the invention can be realized by the following technical scheme:

the invention aims to protect a handheld structure apparent crack measuring device, which comprises a telescopic bracket, a shooting module, an image processing module and a distance measuring module, wherein the telescopic bracket specifically comprises the following components:

the starting end of the telescopic bracket can axially extend and retract relative to the tail end;

the shooting module is arranged at the tail end of the telescopic support and can acquire an apparent crack image of the structure of the target area within a specific shooting distance range;

the image processing module is arranged at the starting end of the telescopic support and is electrically connected with the shooting module, and the image processing module is used for extracting apparent crack characteristics of the structural apparent crack image in the target range acquired by the image acquisition module, numbering and storing the apparent crack characteristics, and uploading the number to a structural crack characteristic information database of a user side in a wireless communication mode;

the distance measurement module is arranged on the shooting module and electrically connected with the image processing module, the distance measurement module acquires the distance between the shooting module and the area to be detected in real time and transmits the distance to the image processing module in real time, and when the distance between the shooting module and the area to be detected is within a preset threshold range, the image processing module instructs the shooting module to adjust the focal length adaptively, so that each acquired picture has the same resolution precision.

Furthermore, the telescopic bracket is an electrically driven electric telescopic rod.

Furthermore, the image processing module comprises a processing module shell and a microprocessor arranged in the shell, and the image processing module also comprises a RAM, a ROM and a wireless signal transceiver which are electrically connected with the microprocessor through a bus.

Further, the microprocessor is an ARM architecture processor or an x86 architecture processor.

Furthermore, an operation panel and a display screen are further arranged on the shell, and the operation panel and the display screen are electrically connected with the microprocessor through a bus.

Further, the ranging module comprises at least one laser ranging sensor, and the laser ranging sensor is electrically connected with the microprocessor through a bus.

Furthermore, the telescopic support is of a multi-section electric cylinder structure, a driving motor of the multi-section electric cylinder structure is electrically connected with the microprocessor, and constant-speed extension and contraction of the multi-section electric cylinder structure are achieved through servo control of the microprocessor.

Furthermore, the tail end of the multi-section electric cylinder structure is electrically connected with the shooting module, and the starting end of the multi-section electric cylinder structure is fixedly connected with the processing module shell.

Furthermore, the shooting module comprises an industrial camera and a light-emitting unit, wherein the light-emitting unit is arranged around the industrial camera in a surrounding mode to form uniform surrounding type illumination assistance.

Further, the image acquisition precision of the industrial camera is greater than or equal to 0.01 mm.

Furthermore, the rod body of the electric telescopic rod is made of carbon fibers, so that the overall weight is reduced, and a light integral structure is realized.

Compared with the prior art, the invention has the following technical advantages:

1) the handheld structure appearance crack measuring device in the technical scheme can realize real-time display, numbering, storage and uploading of characteristic information of cracks to a database, and has the advantages of rapidness, standardization, informatization, accuracy, intellectualization and the like compared with the traditional method.

2) The handheld structure apparent crack measuring device in the technical scheme is used for the whole-life safety maintenance and information management of a bridge structure from construction to operation period, the informatization performance of an effective supporting structure is monitored, and the crack characteristic information database constructed by the equipment in the technical scheme is directly used for life cycle engineering information management, operation and maintenance evaluation and decision support.

3) The handheld structure apparent crack measuring device in the technical scheme is small in size and flexible and convenient to operate, can be carried to a narrow space and an irregular plane by a user, and realizes the adjustment of the telescopic control, the shooting parameters, the image processing parameters, the feature extraction threshold and the parameters of the multi-section electric cylinder structure and the crack information acquisition of the structure surface by forming the man-machine interaction of the user and the microprocessor through the operation panel and the display screen.

4) According to the technical scheme, a threshold ranging shooting function is formed, when the distance of the area to be detected is within a preset threshold range, the image processing module instructs the shooting module to adaptively adjust the focal length, so that each acquired picture has the same resolution precision.

Drawings

FIG. 1 is a schematic structural diagram of a handheld structural appearance crack measuring device according to the present disclosure;

FIG. 2 is a schematic view of another hand-held structural appearance crack measuring device according to the present disclosure;

fig. 3 is a schematic view of the simple concept and principle of the technical scheme.

In the figure: 1. telescopic bracket, 2, shooting module, 3, image processing module, 21, industrial camera, 22, light-emitting unit, 31, processing module casing, 32, operating panel, 33, display screen.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Example 1

The invention aims to protect a handheld structure apparent crack measuring device, which comprises a telescopic bracket 1, a shooting module 2, an image processing module 3, a distance measuring module and a matched mobile power supply or fixed wiring power supply, and is shown in fig. 1 and 2. Compared with the traditional method, the handheld structure appearance crack measuring device has the advantages of rapidness, standardization, informatization, accuracy, intellectualization and the like. The handheld structure apparent crack measuring device is used for the whole-life safety maintenance and the informatization management of a bridge structure from construction to operation period, the informatization performance of an effective supporting structure is monitored, and the crack characteristic information database constructed by the equipment in the technical scheme is directly used for life cycle engineering informatization management, operation and maintenance evaluation and decision support.

The telescopic bracket 1 is axially telescopic at the beginning relative to the end. In this embodiment, the telescopic bracket 1 is an electrically driven electric telescopic rod. The telescopic support 1 is of a multi-section electric cylinder structure, a driving motor of the multi-section electric cylinder structure is electrically connected with the microprocessor, and constant-speed extension and contraction of the multi-section electric cylinder structure are achieved through servo control of the microprocessor. In specific implementation, the multi-section electric cylinder structure adopts 4 electric cylinders produced by Lingde Industrial Co., Ltd, and the servo drivers of the 4 electric cylinders are directly connected with the microprocessor in the technical scheme through a bus to form servo control. The tail end of the multi-section electric cylinder structure is electrically connected with the shooting module 2, and the starting end of the multi-section electric cylinder structure is fixedly connected with the processing module shell 31. When the specific material is selected, the rod body material of the electric telescopic rod is carbon fiber, so that the whole weight is reduced, and a light integral structure is realized. The telescopic bracket 1 plays a key role in corresponding to the lightweight of the integral structure in the embodiment, the handheld structure apparent crack measuring device is small in size and convenient to operate, can be carried to a narrow space and an irregular plane by a user, and can realize the telescopic control, shooting parameters, image processing parameters, feature extraction threshold values and parameter adjustment of a multi-section electric cylinder structure and the crack information acquisition of the structure surface by the man-machine interaction of the user and a microprocessor formed by the operation panel 32 and the display screen 33.

In the embodiment, the shooting module 2 is arranged at the tail end of the telescopic support 1, and can acquire an apparent crack image of the structure of the target area within a specific shooting distance range. The shooting module 2 comprises an industrial camera 21 and a light-emitting unit 22, wherein the light-emitting unit 22 is arranged around the industrial camera 21 in a surrounding manner to form uniform peripheral illumination assistance. The image acquisition accuracy of the industrial camera 21 is 0.01mm or more. The industrial camera 21 can realize efficient focusing with the aid of arithmetic assistance of the microprocessor.

The distance measurement module is arranged on the shooting module 2 and is electrically connected with the image processing module 3, the distance measurement module acquires the distance between the shooting module 2 and the area to be detected in real time and transmits the distance to the image processing module 3 in real time, and when the distance between the shooting module 2 and the area to be detected is within a preset threshold range, the image processing module 3 instructs the shooting module 2 to adjust the focal length adaptively, so that each acquired picture has the same resolution precision. The distance measurement module in this embodiment may constitute a linkage control with a driving motor in a multi-section electric cylinder structure and a zoom original in the industrial camera 21, so as to achieve the same resolution precision in shooting.

The image processing module 3 is arranged at the starting end of the telescopic support 1, the image processing module 3 is electrically connected with the shooting module 2, and the image processing module 3 extracts the apparent crack characteristics of the structure within the target range acquired by the image acquisition module 3, numbers and stores the apparent crack characteristics, and uploads the number and the storage to a structure crack characteristic information database of a user side in a wireless communication mode.

The image processing module 3 comprises a processing module shell 31 and a microprocessor arranged in the shell, and the image processing module 3 further comprises a RAM, a ROM and a wireless signal transceiver which are electrically connected with the microprocessor through a bus. The microprocessor in this embodiment is an ARM architecture processor or an x86 architecture processor. The shell 31 is also provided with an operation panel 32 and a display screen 33, and the operation panel 32 and the display screen 33 are electrically connected with the microprocessor through a bus. The distance measuring module comprises at least one laser distance measuring sensor which is electrically connected with the microprocessor through a bus.

The conception of the handheld structure apparent crack measuring device in the technical scheme can refer to fig. 3, the device is small in size and convenient to operate, a user can carry the handheld structure apparent crack measuring device to a narrow space and an irregular plane, the man-machine interaction between the user and a microprocessor is formed by the operation panel 32 and the display screen 33, the telescopic control of a multi-section electric cylinder structure, the adjustment of shooting parameters, image processing parameters, feature extraction thresholds and parameters are achieved, and the crack information on the surface of the structure is obtained. The image processing module 3 is mainly used for receiving image data acquired by the shooting module, processing, analyzing and integrating the image, and feeding back the processed image and crack characteristic information to a user in real time through a liquid crystal display screen, wherein the microprocessor analyzes and processes the image data through image binaryzation preloaded in a ROM and a dynamic characteristic point capturing processing algorithm to obtain structural apparent crack length, width and inclination angle characteristic data in the image; the microprocessor builds an information model ID for the scanned crack based on the structural apparent crack characteristic information data, generates a crack standard number and stores the crack standard number in a ROM, and a user can export data to a structural crack characteristic information database of an external terminal in a wireless transmission mode, so that support is provided for later-stage intelligent operation and maintenance and information-based safety management, and the structural safety performance can be evaluated in real time.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.