An integrated testing device and method for engineering pipelines

Abstract

This invention discloses an integrated testing device and method for engineering pipelines. The method includes the following steps: Step 1: Obtaining the height position of the upper edge of the support roller using a visual sensing module; Step 2: Placing the pipe to be tested over the support roller, allowing it to suspend under its own weight; Step 3: Obtaining the initial visual image information of the pipe to be tested using the visual sensing module, acquiring the height positions of the upper and lower edges; Step 4: Rotating the support roller at a uniform speed, causing the pipe to rotate by an angle; Step 5: Once the pipe is stationary, obtaining the visual image information of the pipe to be tested using the visual sensing module, acquiring the height positions of the upper and lower edges; Step 6: Repeating steps 4 and 5; Step 7: Extracting information from the acquired visual image information, extracting key parameters of the pipe to be tested at various angular positions; Step 8: Integrating the key parameters and outputting the testing results.

Description

Technical Field

[0001] This invention relates to the field of pipe inspection technology, and more specifically, to an integrated inspection device for engineering pipelines, and also to an inspection method using the device. Background Technology

[0002] As a core component in industrial production and municipal construction, the uniformity of pipe wall thickness, the roundness of its inner and outer circumferences, and the coaxiality of its inner and outer centers (relative positional deviation) directly affect product quality and the overall construction quality. Currently, when inspecting pipelines, contact measuring tools such as calipers and micrometers are commonly used. However, this method suffers from drawbacks such as low inspection efficiency, large human error, and the inability to achieve full circumferential inspection. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated testing device and method for engineering pipelines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An integrated inspection device for engineering pipelines includes a horizontally arranged support roller, which is used to pass through the inner circumference of the pipe and can suspend and support the pipe; it also includes a visual sensing module, which is located on the side of the pipe and can acquire the horizontal orthographic projection of the pipe.

[0006] The present invention is further configured such that the support roller can be driven to rotate by a driver, and the support roller can drive the tube body to rotate.

[0007] This invention also provides an integrated inspection method for engineering pipelines, employing the integrated inspection device for engineering pipelines as described above. The steps of the inspection method include:

[0008] Step 1: Obtain the height position of the upper edge of the support roller through the vision sensing module;

[0009] Step 2: Place the tube to be tested over the support roller, so that the tube is suspended from the support roller by its own weight;

[0010] Step 3: Obtain the initial visual image information of the tube under test through the visual sensing module, and obtain the height position of the upper edge and the height position of the lower edge of the tube under test;

[0011] Step 4: Rotate the support roller at a constant speed to drive the tube to be tested to rotate by an angle θ;

[0012] Step 5: With the tube to be tested stationary, the visual image information of the tube to be tested is obtained through the visual sensing module, and the height positions of the upper and lower edges of the tube to be tested are obtained.

[0013] Step 6: Repeat steps 4 and 5 until the tube to be tested has rotated at least 360°;

[0014] Step 7: Extract information from the visual image acquisition images to extract key parameters of the tube under test at various angular positions;

[0015] Step 8: Integrate key parameters and output detection results.

[0016] The present invention is further configured such that, in step 7, the key parameters include the tube wall thickness, outer circumference roundness, inner circumference roundness, and relative position deviation of the inner and outer center.

[0017] The present invention is further configured such that, in step 7, the wall thickness of the tube at each angle is extracted. Calculate the average wall thickness of the pipe. :

[0018]

[0019] Where i represents the number of detections, and the initial state is i=0.

[0020] The present invention is further configured such that, in step 7, the maximum and minimum values ​​of the wall thickness of the tube are extracted to obtain the wall thickness range of the tube;

[0021] Calculate the relative positional deviation of the inner and outer centers based on the wall thickness of the pipe, and obtain the eccentricity distance between the inner and outer centers. and eccentricity direction angle .

[0022] The present invention is further configured such that, in the process of calculating the relative position deviation between the inner and outer center points, the relative position deviation between the inner and outer center points is decomposed into deviations in two mutually perpendicular directions, namely, eccentric component A and eccentric component B.

[0023] The eccentric component A is:

[0024]

[0025] The eccentric component B is:

[0026]

[0027] in, Let be the angle detected during the i-th rotation.

[0028] The present invention is further configured such that, during the calculation of the relative position deviation between the inner and outer centers, the eccentricity distance between the inner and outer centers is... for: ; Eccentricity direction angle for: .

[0029] The present invention is further configured such that, in step 7, the method for calculating the outer circumference roundness is as follows:

[0030] Extract the outer diameter of the tube at various angles Calculate the average outer diameter of the pipe body :

[0031]

[0032] Where i is the number of detections, and the initial state is i=0;

[0033] Extract the maximum outer diameter of the tube. and minimum value Obtain the wall thickness range of the outer diameter of the tube. ;

[0034] The method for calculating the inner circumference roundness is as follows:

[0035] Extract the inner diameter of the pipe at various angles Calculate the average inner diameter of the pipe body :

[0036]

[0037] Where i is the number of detections, and the initial state is i=0;

[0038] Extract the maximum inner diameter of the tube and minimum value Obtain the wall thickness range of the inner diameter of the tube. .

[0039] The present invention is further configured such that, in step 1, the support roller is rotated one revolution, and the height position of the upper edge of the support roller is continuously obtained through the vision sensing module, and the self-deviation of the height position of the upper edge of the support roller is obtained.

[0040] By calculating the outer circumference of the support roller and the inner circumference of the tube, the deviation of the support roller is corrected when obtaining the height position of the upper edge of the tube.

[0041] In summary, the present invention has the following beneficial effects:

[0042] By using support rollers to suspend and support the pipe, and in conjunction with a vision sensing module, the orthographic projection of the pipe in the horizontal direction can be obtained, resulting in a roughly rectangular visual image. Combined with the original position and dimensions of the support rollers, the thickness of the upper wall of the pipe and the overall outer diameter of the pipe can be obtained, thus acquiring the pipe fitting inspection parameters and improving the accuracy and convenience of pipe inspection. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the tube end in this embodiment;

[0044] Figure 2 This is a schematic diagram of the side of the tube body in this embodiment;

[0045] Figure 3 This is a flowchart of an integrated inspection method for engineering pipelines in this embodiment.

[0046] Reference numerals: tube body 1; support roller 2. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] This embodiment discloses an integrated testing device for engineering pipelines, referring to... Figure 1 , Figure 2 As shown, it includes a horizontally arranged support roller 2, wherein one end of the support roller 2 is rotatably mounted on the equipment frame, and the other end is connected to the drive end of the rotary driver; the rotary driver can drive the support roller 2 to rotate.

[0049] Furthermore, the two ends of the support roller 2 are detachable for installation and connection. During the disassembly and assembly of the tube body 1, the two ends of the support roller 2 can be removed, and then the support roller 2 can be inserted into the inner circumference of the tube body 1. The two ends of the support roller 2 can then be reinstalled, and the tube body 1 can be suspended and supported by the support roller 2.

[0050] The detection device in this embodiment further includes a visual sensing module located on the side of the tube body, capable of acquiring the horizontal orthographic projection of the tube body 1. The visual sensing module includes a visual sensor and a backlight. The backlight and visual sensor are positioned opposite each other on both sides of the tube body 1 to provide high-contrast illumination for the horizontal orthographic projection of the tube body 1, ensuring that the image edges are clearly discernible. Additionally, a background plate can be provided on the side of the tube body 1 to further enhance the clarity of the acquired image information.

[0051] This embodiment also discloses an integrated inspection method for engineering pipelines, which uses the integrated inspection device for engineering pipelines as described above to inspect the pipe body 1 to be tested. Specifically, refer to... Figure 3 As shown, the detection method includes the following steps:

[0052] Step 1: Obtain the height position of the upper edge of the support roller using the vision sensing module. ;in, This indicates the height position of the upper edge of the initial support roller in its initial state.

[0053] Step 2: Place the tube to be tested over the support roller, so that the tube to be tested 1 hangs over the support roller by its own weight; the difference between the size of the tube to be tested and the outer diameter of the support roller 2 is limited, and the outer diameter of the support roller 2 should be less than 1 / 5 of the inner diameter of the tube to be tested, to ensure that the tube to be tested 1 can maintain natural hanging support outside the support roller 2 after being placed; after a period of stillness, the tube to be tested 1 will remain stably suspended and still;

[0054] Step 3: Obtain the initial visual image information of the tube under test through the vision sensing module, and obtain the initial upper edge height position of the tube under test. and the initial bottom edge height position ;

[0055] according to , and The wall thickness of the upper side of tube 1 can be obtained. Current status of pipe body 1: upper and lower pipe diameters , for: ; ;

[0056] Step 4: Start the rotary driver to rotate the support roller at a constant speed, causing the tube to be tested to rotate by an angle θ, for example, θ can be 10°-30°. During the rotation drive, ensure that the support roller 2 does not slip against the inner wall of the tube 1. Furthermore, control the rotation angle of the support roller 2 according to the outer diameter of the support roller 2 and the inner diameter of the tube 1, thereby controlling the deflection angle of the tube 1. Alternatively, the deflection angle of the tube 1 can also be obtained through a separate angle sensor.

[0057] Step 5: With the tube to be tested stationary, acquire visual image information of the tube to be tested through the vision sensing module to obtain the height position of the upper edge of the tube to be tested. and the height position of the bottom edge ;

[0058] Step 6: Repeat steps 4 and 5 until the tube under test has rotated at least 360°. During the repeated detection process, let i represent the number of angular deflections, with i=0 representing the initial state of rotation. The repeated detection yields a dataset, which includes the following information: wait.

[0059] Step 7: Extract information from the visual image information acquired, and extract the key parameters of the tube under test at various angle positions; the key parameters include tube wall thickness, outer circumference, inner circumference, and relative position deviation of the inner and outer centers.

[0060] In step 7, the wall thickness of the tube at each angle is extracted. Calculate the average wall thickness of the pipe. :

[0061]

[0062] Where i represents the number of detections, and the initial state is i=0.

[0063] Based on the wall thickness distribution, the maximum wall thickness of the pipe is extracted. and minimum value Obtain the wall thickness range of the tube body Through the range of wall thickness This allows us to obtain information about eccentricity and determine the minimum and maximum wall thickness locations, thus identifying the circumferential weakness points of pipe 1. Furthermore, by analyzing the wall thickness at various angular positions... Analysis can reveal the uniformity of the overall wall thickness distribution of pipe 1, which can be represented by variance or standard deviation. When the deviation exceeds the deviation threshold, it indicates a degree of deviation, and the wall thickness consistency of pipe 1 is poor.

[0064] Calculate the relative positional deviation of the inner and outer centers based on the wall thickness of the pipe, and obtain the eccentricity distance between the inner and outer centers. and eccentricity direction angle This allows us to determine the concentricity of the tube's inner and outer periphery.

[0065] Specifically, in the process of calculating the relative position deviation of the inner and outer circles, the relative position deviation of the inner and outer circles is decomposed into deviations in two mutually perpendicular directions, namely eccentric component A and eccentric component B.

[0066] The eccentric component A is:

[0067]

[0068] The eccentric component B is:

[0069]

[0070] in, Let be the angle detected during the i-th rotation.

[0071] In the calculation of the relative position deviation between the inner and outer centers, the eccentricity distance between the inner and outer centers is... for:

[0072]

[0073] Eccentricity Direction Angle for:

[0074]

[0075] Among them, the eccentricity direction angle The angle is related to the initial angle of tube 1, and can be determined based on this eccentric direction angle. Markings are made on the surface of pipe body 1 to facilitate subsequent installation based on the eccentricity.

[0076] During the testing process, the eccentricity distance can be preset according to different standard requirements. The threshold is used to compare the current pipe body 1 with the threshold, thereby obtaining the qualification status of the current pipe body 1.

[0077] Furthermore, some pipe bodies 1 have holes or mounting grooves on their outer surface, which means that pipe body 1 can only be installed at the designed angle. For this type of pipe, an eccentricity distance can be preset simultaneously. and eccentricity direction angle By combining the threshold values ​​of the two, we can obtain the qualification status of the current pipe body 1.

[0078] In addition, the method for calculating the outer circumference roundness in step 7 is as follows:

[0079] Extract the outer diameter of the tube at various angles Calculate the average outer diameter of the pipe body :

[0080]

[0081] Where i is the number of detections, and the initial state is i=0;

[0082] Extract the maximum outer diameter of the tube. and minimum value Obtain the wall thickness range of the outer diameter of the tube. In addition, by calculating the outer diameter of the tube... The standard deviation can be used to obtain the roundness deviation of the current tube's outer diameter.

[0083] The method for calculating the inner circumference roundness is as follows:

[0084] Extract the inner diameter of the pipe at various angles Calculate the average inner diameter of the pipe body :

[0085]

[0086] Where i is the number of detections, and the initial state is i=0;

[0087] Extract the maximum inner diameter of the tube and minimum value Obtain the wall thickness range of the inner diameter of the tube. Additionally, by calculating the inner diameter of the tube... The standard deviation can be used to obtain the roundness deviation of the current inner diameter of the tube.

[0088] Step 8: The data processing unit integrates all the above key parameters, generates a test report, clearly marks the values ​​of each parameter, and completes the integrated test of the tube to be tested.

[0089] Furthermore, in order to improve the accuracy of the detection and eliminate the deviation caused by the eccentricity of the support roller itself, the deviation of the support roller 2 itself can be obtained in advance.

[0090] In step 1, the support roller 2 is rotated one revolution beforehand, and the height position of the upper edge of the support roller is continuously acquired through the vision sensing module. The deviation of the height position of the upper edge of the support roller is obtained, and the height of the upper edge of the support roller 2 at different angular positions is recorded. The height of the upper edge of the support roller 2 is... The expression indicates that j represents different angular positions of the support roller 2. For the height of the upper edge of the support roller 2, a smaller rotation angle can be used for data acquisition, and the angular deviation of the acquisition can be 1-3°. Within the 360° circumferential range, multiple detection data acquisition points can be obtained.

[0091] By calculating the outer circumference of the support roller 2 and the inner circumference of the tube, the self-deviation of the support roller is corrected when obtaining the height position of the upper edge of the tube; the circumferential position of the support roller 2 is coupled with the rotation angle of the tube, and the corresponding tube rotation angle is used to correct the deviation of the support roller 2. In this case, the angular position of the corresponding support roller 2 can be obtained, and thus the height of the upper edge can be determined. Replace the height position of the top edge This is to eliminate the effects of the deviation of the support roller 2 itself.

[0092] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An integrated testing device for engineering pipelines, characterized in that, It includes a horizontally arranged support roller (2), which is used to pass through the inner circumference of the tube body (1) and can suspend and support the tube body (1); it also includes a vision sensing module, which is located on the side of the tube body (1) and can obtain the horizontal orthographic projection of the tube body (1).

2. The integrated testing device for engineering pipelines according to claim 1, characterized in that, The support roller (2) can be driven to rotate by a driver, and the support roller (2) can drive the tube body (1) to rotate.

3. An integrated inspection method for engineering pipelines, characterized in that, The integrated pipeline inspection device as described in claim 1 or 2, wherein the inspection method comprises the following steps: Step 1: Obtain the height position of the upper edge of the support roller through the vision sensing module; Step 2: Place the tube to be tested over the support roller, so that the tube is suspended from the support roller by its own weight; Step 3: Obtain the initial visual image information of the tube under test through the visual sensing module, and obtain the height position of the upper edge and the height position of the lower edge of the tube under test; Step 4: Rotate the support roller at a constant speed to drive the tube to be tested to rotate by an angle θ; Step 5: With the tube to be tested stationary, the visual image information of the tube to be tested is obtained through the visual sensing module, and the height positions of the upper and lower edges of the tube to be tested are obtained. Step 6: Repeat steps 4 and 5 until the tube to be tested has rotated at least 360°; Step 7: Extract information from the visual image acquisition images to extract key parameters of the tube under test at various angular positions; Step 8: Integrate key parameters and output detection results.

4. The integrated inspection method for engineering pipelines according to claim 3, characterized in that, In step 7, the key parameters include the tube wall thickness, outer circumference roundness, inner circumference roundness, and relative position deviation of the inner and outer center positions.

5. The integrated inspection method for engineering pipelines according to claim 3, characterized in that, In step 7, the wall thickness of the tube at each angle is extracted. Calculate the average wall thickness of the pipe. : Where i represents the number of detections, and the initial state is i=0.

6. The integrated inspection method for engineering pipelines according to claim 5, characterized in that, In step 7, the maximum and minimum wall thicknesses of the tube are extracted to obtain the wall thickness range of the tube; Calculate the relative positional deviation of the inner and outer centers based on the wall thickness of the pipe, and obtain the eccentricity distance between the inner and outer centers. and eccentricity direction angle .

7. The integrated inspection method for engineering pipelines according to claim 6, characterized in that, In the process of calculating the relative position deviation of the inner and outer circles, the relative position deviation of the inner and outer circles is decomposed into deviations in two mutually perpendicular directions, namely eccentric component A and eccentric component B. The eccentric component A is: The eccentric component B is: in, Let be the angle detected during the i-th rotation.

8. The integrated inspection method for engineering pipelines according to claim 7, characterized in that, In the calculation of the relative position deviation between the inner and outer centers, the eccentricity distance between the inner and outer centers is... for: ; Eccentricity direction angle for: .

9. The integrated inspection method for engineering pipelines according to claim 8, characterized in that, In step 7, the method for calculating the outer circumference roundness is as follows: Extract the outer diameter of the tube at various angles Calculate the average outer diameter of the pipe body : Where i is the number of detections, and the initial state is i=0; Extract the maximum outer diameter of the tube. and minimum value Obtain the wall thickness range of the outer diameter of the tube. ; The method for calculating the inner circumference roundness is as follows: Extract the inner diameter of the pipe at various angles Calculate the average inner diameter of the pipe body : Where i is the number of detections, and the initial state is i=0; Extract the maximum inner diameter of the tube and minimum value Obtain the wall thickness range of the inner diameter of the tube. .

10. The integrated inspection method for engineering pipelines according to claim 3, characterized in that, In step 1, the support roller is rotated one revolution, and the height position of the upper edge of the support roller is continuously acquired through the vision sensing module to obtain the self-deviation of the height position of the upper edge of the support roller. By calculating the outer circumference of the support roller and the inner circumference of the tube, the deviation of the support roller is corrected when obtaining the height position of the upper edge of the tube.

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