Device and method for detecting the slope of cut surface of galvanized pipe

Abstract

The present invention discloses a device and method for detecting the inclination of the cut surface of a galvanized pipe, which belongs to the technical field of galvanized pipe detection. The device and method comprise: a centering mechanism, a detection mechanism coaxially arranged with the centering mechanism, and a power mechanism connected to the detection mechanism; the centering mechanism comprises: a connecting shaft, a connecting sleeve and a movable sleeve arranged on the connecting shaft, a first rotating arm and a second rotating arm connected to the connecting sleeve, a third rotating arm connected to the movable sleeve, and a leveling plate connected to the first rotating arm and the second rotating arm respectively, the third rotating arm also being connected to the middle of the first rotating arm and the second rotating arm. The present invention solves the technical problems of low measurement efficiency and large error in the inclination of the cut surface of a galvanized pipe, which result in the inability to ensure the reliability of the pipeline connection and the installation accuracy, and realizes the rapid detection of the inclination of the cut surface of the galvanized pipe, while effectively suppressing the interference of high noise sources and improving the detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of galvanized pipe testing technology, specifically to a device and method for detecting the slope of a galvanized pipe cut surface. Background Technology

[0002] The bevel angle of a galvanized pipe cut refers to the degree to which the cut plane is not perpendicular to the pipe's axis when cutting galvanized steel pipes. Ideally, a perfect cut should have the cut plane completely perpendicular to the pipe's central axis. However, in actual cutting, due to factors such as worn cutting tools, unstable feed, equipment precision issues, improper operation, or insecure pipe fixing, the cut plane may deviate from the vertical direction, forming a bevel. When welding two pipe ends together or connecting them with fittings, an excessive bevel angle can lead to poor contact at the joint surfaces, affecting the strength, sealing, and aesthetics of the connection.

[0003] In existing technologies, the reference edge of a ruler is usually placed against the outer wall of the steel pipe to measure the gap or angle between the vertical edge of the ruler and the cutting plane to obtain the cut surface slope. However, this method of inspection is inefficient and the cut surface slope error of galvanized pipe is relatively large, which makes it impossible to guarantee the reliability of pipe connection and installation accuracy. Summary of the Invention

[0004] To solve the above problems, the first aspect of the present invention provides a galvanized pipe cut surface slope detection device, comprising: a centering mechanism, a detection mechanism coaxially arranged with the centering mechanism, and a power mechanism connected to the detection mechanism;

[0005] The centering mechanism includes: a connecting shaft, a connecting sleeve and a movable sleeve disposed on the connecting shaft, a first rotating arm and a second rotating arm connected to the connecting sleeve, a third rotating arm connected to the movable sleeve, and a finding plate connected to the first rotating arm and the second rotating arm respectively. The third rotating arm is also connected to the middle part of the first rotating arm and the second rotating arm.

[0006] It also includes a pneumatic component, which, after abutting against the movable sleeve, is used to drive the movable sleeve to slide towards the connecting sleeve, thereby opening the first rotating arm and the second rotating arm until the plate abuts against the inner wall of the galvanized pipe.

[0007] In some embodiments, the pneumatic assembly includes: a cylinder, a guide rod disposed in the cylinder, and a piston;

[0008] The cylinder body has an internal cavity, the piston is disposed in the cavity of the cylinder body, and the guide rod is connected to the piston and its two ends pass through the cylinder body;

[0009] One end of the guide rod is provided with an air injection channel, and the middle part is provided with an air injection hole that communicates with the air injection channel. The air injection hole is connected to the cavity of the cylinder.

[0010] The cavity in the cylinder located on the side where the piston is connected to the air injection port is a pressure chamber; the pressure chamber is used to push the piston and guide rod to move as a whole after the gas pressure medium is injected.

[0011] In some embodiments, the connecting shaft is further provided with a connecting channel, and the end of the guide rod away from the air injection channel is located in the connecting channel. After the end of the guide rod away from the air injection channel abuts against the movable sleeve, it pushes the movable sleeve to slide towards the connecting sleeve.

[0012] In some embodiments, the detection mechanism includes: a first fixed base, a bonding roller disposed on the first fixed base, a first guide rod and a second guide rod connected to the first fixed base, a sliding iron core connected to the first guide rod and the second guide rod, a pressure plate connected to the sliding iron core and the bonding roller, and a displacement sensor adapted to the sliding iron core.

[0013] The first fixed seat is sleeved on the pneumatic component and rotatably connected to the pneumatic component via a bearing;

[0014] The bonding roller, after coming into contact with the galvanized pipe opening, is used to obtain the deviation of the pipe opening relative to the vertical cutting surface during rotation.

[0015] The displacement sensor is adapted to the sliding iron core and is used to obtain the displacement of the sliding iron core.

[0016] The detection mechanism further includes a second reset spring, which is disposed on the second guide rod, with one end abutting against the sliding iron core, and is used to limit the sliding iron core.

[0017] In some embodiments, the number of bonding rollers, first guide rods, second guide rods, sliding iron cores, pressure plates, and displacement sensors in the detection mechanism is multiple sets;

[0018] The detection mechanism further includes: a second fixed seat coaxially arranged with the first fixed seat, the second fixed seat being connected to the first fixed seat via a connecting plate;

[0019] The power mechanism includes a motor, a driving wheel mounted on the motor, and a driven wheel meshing with the driving wheel, the driven wheel being sleeved on a second fixed base.

[0020] The first aspect of the invention provides a method for detecting the bevel angle of a galvanized pipe cut surface, and a galvanized pipe cut surface bevel detection device based on any one of the above solutions, comprising the following steps:

[0021] Establish testing standards;

[0022] Obtain galvanized pipe data;

[0023] Determine the data stability of each data source based on galvanized pipe data;

[0024] Based on the stability of data from various data sources, the final data for galvanized pipes is determined by integrating the data from each data source.

[0025] The cut slope is determined based on the final data of the galvanized pipe.

[0026] In some embodiments, determining the data stability of each data source includes:

[0027] Stability index calculated based on galvanized pipe data;

[0028] The stability index is calculated as follows:

[0029] ;

[0030] in, Indicates the first A matrix of detection data from multiple data sources. This indicates the first data point in the first lap. Indicates the first lap Data, Indicates the first The first data point in the circle; Indicates the first The first circle One data point;

[0031] ;

[0032] in, ;

[0033] ;

[0034] in, For the first Stability index of each data source.

[0035] In some embodiments, the data fused from the various data sources includes:

[0036] The basic weight of each data source is determined based on the stability index of each data source.

[0037] The adaptive spatial weight of each data source at each measurement location is determined based on the data stability of each data source.

[0038] The final weight of each data source is determined based on the base weight of each data source and the adaptive spatial weight of each data source at each measurement location.

[0039] The final data for galvanized pipes is determined based on the final weight of each data source.

[0040] In some embodiments, the basic weight of the data source is calculated as follows:

[0041] The basic weight of the data source is calculated as follows:

[0042] ;

[0043] in, Indicates the first The basic weights of each data source; The number of data sources;

[0044] The adaptive spatial weights are calculated as follows:

[0045] ;

[0046] in, Indicates the first The data source in the first Adaptive spatial weights for each measurement location;

[0047] The final weight calculation method for each data source is as follows:

[0048] ;

[0049] in, Show the first The final weight of each data source, This is an empirical coefficient. .

[0050] In some embodiments, determining the final data for the galvanized pipe includes:

[0051] The deviation value for each measurement location is determined based on the final weight of each data source;

[0052] The deviation value for each measurement position is calculated as follows:

[0053] ;

[0054] in, for Deviation value at;

[0055] The deviation sequence of the galvanized pipe is determined based on the deviation value at each measurement location;

[0056] The specific method is as follows: ;

[0057] Determining the cut surface angle includes:

[0058] Extract the maximum deviation value from the galvanized pipe deviation sequence;

[0059] The specific method is as follows:

[0060] ;

[0061] ;

[0062] Calculate the cutting surface slope based on the maximum deviation value:

[0063] The specific method is as follows: ;

[0064] in, This refers to the bevel angle of the cutting surface.

[0065] By adopting the above technical solution, the present invention mainly has the following technical effects:

[0066] By utilizing a motor to drive the detection mechanism to rotate at a uniform speed via a second fixed seat, the deviation of the pipe opening relative to the vertical cut surface is obtained by measuring the offset of the contact roller when it comes into contact with the galvanized pipe opening. In addition, data from various data sources are fused during the detection process. This solves the technical problems of low measurement efficiency and large error in the slant of the galvanized pipe cut surface, which leads to the inability to guarantee the reliability of pipe connection and installation accuracy. It realizes rapid detection of the slant of the galvanized pipe cut surface, while effectively suppressing interference from high noise sources and improving detection accuracy. Attached Figure Description

[0067] Figure 1 This is a schematic diagram of the structure of a galvanized pipe cutting surface slope detection device according to the present invention;

[0068] Figure 2 This is a schematic diagram of the galvanized pipe cutting surface slope detection device of the present invention (from another perspective);

[0069] Figure 3 This is a schematic diagram of the internal structure of a galvanized pipe cutting surface slope detection device according to the present invention;

[0070] Figure 4 This is a schematic diagram of the centering mechanism in a galvanized pipe cutting surface slope detection device of the present invention;

[0071] Figure 5 This is a schematic diagram of the pneumatic components in a galvanized pipe cutting surface slope detection device of the present invention;

[0072] Figure 6 This is a schematic diagram of the structure of a galvanized pipe cutting surface slope detection device (with some components hidden) according to the present invention;

[0073] Figure 7This is a schematic diagram of the internal structure of a galvanized pipe cut surface slope detection device (with some components hidden) according to the present invention.

[0074] The meanings of the reference numerals in the attached figures are as follows:

[0075] 1. Centering mechanism; 11. Connecting shaft; 111. First return spring; 112. Sliding groove; 113. Connecting channel; 12. Connecting sleeve; 13. Movable sleeve; 131. Sliding key; 14. First rotating arm; 15. Second rotating arm; 16. Third rotating arm; 17. Finding plate; 18. Pneumatic assembly; 181. Cylinder; 182. Guide rod; 183. Piston; 184. Injection channel; 185. Injection port; 186. Pressure chamber; 187. Injection pipe;

[0076] 2. Detection mechanism; 21. First fixed seat; 22. Bonding roller; 23. First guide rod; 24. Second guide rod; 25. Sliding iron core; 26. Pressure plate; 27. Displacement sensor; 28. Second return spring; 29. ​​Second fixed seat;

[0077] 3. Power mechanism; 31. Motor; 32. Driving wheel; 33. Driven wheel. Detailed Implementation

[0078] To enable those skilled in the art to better understand the present invention, the technical solutions in 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 a part of the embodiments of the present invention, and not all of them. 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.

[0079] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] Please see Figures 1-7 The first aspect of the present invention provides a device for detecting the slant of the cut surface of a galvanized pipe, comprising: a centering mechanism 1, a detection mechanism 2 coaxially arranged with the centering mechanism 1, and a power mechanism 3 connected to the detection mechanism 2. It should be noted that, in this embodiment, the axial direction refers to the direction of the rotation center axis of the galvanized pipe, that is, the direction common to the center axis, and the radial direction is perpendicular to the axial direction.

[0081] In some embodiments, the centering mechanism 1 is used to align the detection device with the central axis of the galvanized pipe. The centering mechanism 1 includes: a connecting shaft 11, a connecting sleeve 12 and a movable sleeve 13 disposed on the connecting shaft 11, a first rotating arm 14 and a second rotating arm 15 connected to the connecting sleeve 12, a third rotating arm 16 connected to the movable sleeve 13, and a leveling plate 17 connected to the first rotating arm 14 and the second rotating arm 15 respectively. The third rotating arm 16 is also connected to the middle of the first rotating arm 14 and the second rotating arm 15.

[0082] In some embodiments, one end of the first rotating arm 14 and the second rotating arm 15 are respectively hinged to the connecting sleeve 12, and then connected to the connecting shaft 11 via the connecting sleeve 12. One end of the third rotating arm 16 is hinged to the movable sleeve 13, and the other end is hinged to the middle of the second rotating arm 15 and the first rotating arm 14. The movable sleeve 13 is movably connected to the connecting shaft 11. The above structure allows the third rotating arm 16 to drive the second rotating arm 15 and the first rotating arm 14 to rotate about the connection point with the connecting sleeve 12 when the movable sleeve 13 slides on the connecting shaft 11.

[0083] Furthermore, when the movable sleeve 13 slides towards the connecting sleeve 12, it can drive multiple sets of first rotating arms 14 and second rotating arms 15 to open. By circumferentially arranging multiple sets of first rotating arms 14 and second rotating arms 15 on the connecting shaft 11, and by abutting the plate 17 against the inner wall of the galvanized pipe, and then using the inner wall of the galvanized pipe as a reference, the connecting shaft 11 is aligned with the central axis of the galvanized pipe, so that the detection mechanism 2 can be used to measure the cut surface slope after abutting against the pipe opening of the galvanized pipe.

[0084] In some more preferred embodiments, a first return spring 111 is also sleeved on the connecting shaft 11. The two ends of the first return spring 111 abut against the connecting sleeve 12 and the movable sleeve 13 respectively, so that before or after the galvanized pipe cutting surface slope measurement, the movable sleeve 13 is driven to slide away from the connecting sleeve 12, and multiple sets of first rotating arms 14 and second rotating arms 15 are driven to retract and reset.

[0085] Furthermore, the movable sleeve 13 is cylindrical and has a sliding key 131 inside. The connecting shaft 11 has a sliding groove 112 inside that matches the sliding key 131. The sliding process of the movable sleeve 13 on the connecting shaft 11 is realized by the sliding key 131 sliding in the sliding groove 112.

[0086] In some embodiments, the centering mechanism 1 further includes a pneumatic assembly 18, which, after abutting against the movable sleeve 13, drives the movable sleeve 13 to slide towards the connecting sleeve 12, thereby causing the first rotating arm 14 and the second rotating arm 15 to open until the leveling plate 17 abuts against the inner wall of the galvanized pipe. Further, the pneumatic assembly 18 includes: a cylinder 181, a guide rod 182 disposed in the cylinder 181, and a piston 183. In some embodiments, the cylinder 181 is a container for forming a sealed pressure chamber, with an internal cavity. The piston 183 is disposed in the cavity of the cylinder 181, and the guide rod 182 is connected to the piston 183 and extends through the cylinder 181 at both ends.

[0087] Furthermore, one end of the guide rod 182 is provided with an injection channel 184, and the middle part is provided with an injection hole 185 communicating with the injection channel 184. The injection hole 185 is connected to the cavity of the cylinder 181. In the cylinder 181, the cavity located on the side where the piston 183 is connected to the injection hole 185 is a pressure chamber 186. By providing the pressure chamber 186, after the operator injects the gas pressure medium into the pressure chamber 186 through the injection channel 184 and the injection hole 185 in sequence, the operator can push the overall structure of the piston 183 and the guide rod 182 to move in the direction of increasing the volume of the pressure chamber 186. In some embodiments, the pneumatic assembly 18 further includes an injection pipe 187 connected to the injection channel 184, for injecting the gas pressure medium into the pressure chamber 186 through the injection channel 184 and the injection hole 185.

[0088] In some embodiments, the connecting shaft 11 is further provided with a connecting channel 113, and one end of the guide rod 182 away from the air injection channel 184 is provided in the connecting channel 113. After the end of the guide rod 182 away from the air injection channel 184 abuts against the movable sleeve 13, the movable sleeve 13 is pushed to slide towards the connecting sleeve 12 until it abuts against the connecting sleeve 12, and then the movable sleeve 13 is pushed to slide towards the connecting sleeve 12.

[0089] In some embodiments, the detection mechanism 2 is a part used to detect the camber of the cut surface of the galvanized pipe. The detection mechanism 2 includes: a first fixed base 21, a bonding roller 22 disposed on the first fixed base 21, a first guide rod 23 and a second guide rod 24 connected to the first fixed base 21, a sliding iron core 25 connected to the first guide rod 23 and the second guide rod 24, a pressure plate 26 connected to the sliding iron core 25 and the bonding roller 22, and a displacement sensor 27 adapted to the sliding iron core 25.

[0090] In some embodiments, the first fixing seat 21 is a ring structure. The first fixing seat 21 is sleeved on the pneumatic component 18 and rotatably connected to the pneumatic component 18 via a bearing. In some embodiments, after the first fixing seat 21 and the pneumatic component 18 are coaxially arranged, the center axis of the ring-shaped first fixing seat 21 can be aligned with the center axis of the galvanized pipe after the centering mechanism 1 is aligned with the center axis of the galvanized pipe.

[0091] Furthermore, the bonding roller 22 is circumferentially disposed on the first fixed seat 21, and one end of the bonding roller 22 is hinged to the first fixed seat 21. The above design allows the bonding roller 22 to roll along the galvanized pipe opening when the first fixed seat 21 rotates after the bonding roller 22 comes into contact with the galvanized pipe opening.

[0092] In some embodiments, the first guide rod 23 and the second guide rod 24 are arranged parallel to the centering mechanism 1. After the centering mechanism 1 aligns the detection device with the central axis of the galvanized pipe, the first guide rod 23 and the second guide rod 24 are parallel to the central axis of the galvanized pipe.

[0093] In some embodiments, after the bonding roller 22 comes into contact with the galvanized pipe opening, it is used to obtain the deviation of the pipe opening relative to the vertical cutting surface during rotation. Further, when the bonding roller 22 is in contact with the pipe opening, if there is a deviation of the pipe opening relative to the vertical cutting surface when the bonding roller 22 rotates along the pipe opening, the bonding roller 22 will deflect about the hinge point with the first fixed seat 21 as the axis. This deflection will drive the sliding iron core 25 to slide on the first guide rod 23 and the second guide rod 24 via the pressure plate 26. That is, the deflection of the bonding roller 22 can be obtained by obtaining the sliding amount of the sliding iron core 25 on the first guide rod 23 and the second guide rod 24, and then the deviation of the pipe opening relative to the vertical cutting surface can be obtained by the deflection of the bonding roller 22. Finally, the cut surface slope can be calculated by the deviation of the pipe opening relative to the vertical cutting surface.

[0094] In some embodiments, the displacement sensor 27 is adapted to the sliding iron core 25 to obtain the displacement of the sliding iron core 25.

[0095] Furthermore, the number of bonding rollers 22, first guide rods 23, second guide rods 24, sliding iron cores 25, pressure plates 26, and displacement sensors 27 in the detection mechanism 2 is multiple. The displacement of the sliding iron cores 25 is obtained by multiple displacement sensors 27 respectively, and the data is processed, which can effectively improve the measurement accuracy. The data processing process will be further explained below.

[0096] In some more preferred embodiments, the detection mechanism 2 further includes a second reset spring 28, which is disposed on the second guide rod 24, with one end abutting against the sliding iron core 25, for limiting the sliding iron core 25, thereby limiting the rotation of the bonding roller 22, so that the deflection of the bonding roller 22 can be fed back to the sliding iron core 25 in a timely manner via the pressure plate 26.

[0097] Furthermore, the detection mechanism 2 also includes a second fixed seat 29 coaxially arranged with the first fixed seat 21. The second fixed seat 29 is also a circular structure and is connected to the first fixed seat 21 via a connecting plate.

[0098] In some embodiments, the power mechanism 3 is a part used to generate power and transmit it to subsequent components or actuators. The power mechanism 3 includes a motor 31, a driving wheel 32 disposed on the motor 31, and a driven wheel 33 meshing with the driving wheel 32. The driven wheel 33 is sleeved on the second fixed seat 29. The motor 31 can convert electrical energy into mechanical energy based on the principle of electromagnetic induction. The driving wheel 32 and the driven wheel 33 can be a gear structure that meshes with each other. By connecting the driving wheel 32 to the output shaft of the motor 31, the driven wheel 33 is sleeved on the second fixed seat 29, thereby utilizing the operation of the motor 31. The detection mechanism 2 is driven to rotate at a uniform speed through the second fixed seat 29. The deviation of the pipe opening relative to the vertical cutting surface is obtained by the offset of the bonding roller 22 when it comes into contact with the pipe opening.

[0099] A second aspect of the present invention provides a method for detecting the bevel angle of a galvanized pipe cut surface, based on a galvanized pipe cut surface bevel detection device, comprising the following steps:

[0100] S1. Determine the testing standards;

[0101] In some embodiments, the detection benchmark can be confirmed by aligning the detection device with the central axis of the galvanized pipe and then bringing the bonding roller 22 into contact with the opening of the galvanized pipe. In some embodiments, when the bonding roller 22 comes into contact with the opening of the galvanized pipe, the bonding roller 22 can be in a flipped state, that is, the second return spring 28 is in a compressed state, to ensure that the bonding roller 22 can fully come into contact with the opening of the galvanized pipe during the rotation process, thus ensuring measurement accuracy.

[0102] S2. Obtain galvanized pipe data;

[0103] In some embodiments, the galvanized pipe data may be a parameter characterizing the bevel of the cut surface of the galvanized pipe; in some embodiments, the galvanized pipe data may include a pipe end deviation, which represents the offset of the actual pipe end relative to the vertical cut surface (ideal cut); in some embodiments, the galvanized pipe end deviation may be obtained based on the slippage of the sliding core 25, which may be measured by the displacement sensor 27.

[0104] In some embodiments, the acquired galvanized pipe data can be repetitive data. For example, the detection mechanism 2 can be rotated multiple times along the pipe opening by the motor 31, so that the same data source (the same displacement sensor) can repeatedly acquire galvanized pipe data.

[0105] In some embodiments, the deviation of the galvanized pipe nozzle is calculated as follows:

[0106] ;

[0107] in, This refers to the deviation of the galvanized pipe end.

[0108] The effective length of the bonding roller (from hinge point to contact point);

[0109] The length of the pressure plate lever arm (from the hinge point to the sliding iron core);

[0110] This refers to the amount of sliding of the sliding iron core.

[0111] System backlash represents the unexpected motion generated in a mechanical transmission system;

[0112] The guide rod tilt compensation coefficient;

[0113] S3. Determine the data stability of each data source based on galvanized pipe data;

[0114] In some embodiments, the data stability is used to describe the degree of repetition of galvanized pipe data obtained from various data sources. The higher the repetition between repeated data obtained from the same data source, the more stable the data obtained from the same data source is.

[0115] In some embodiments, determining the data stability of each data source includes:

[0116] Stability index calculated based on galvanized pipe data;

[0117] In some embodiments, the stability index is calculated as follows:

[0118] Let the detection data matrix obtained from the same data source be:

[0119] ;

[0120] in, Indicates the first A matrix of detection data from multiple data sources. This indicates the first data point in the first lap. Indicates the first lap Data, Indicates the first The first data point in the circle; Indicates the first The first data point in the circle;

[0121] ;

[0122] in, ;

[0123] ;

[0124] in, For the first Stability index of each data source;

[0125] In some embodiments, the first Stability index of each data source The closer the value is to 1, the better the repeatability and the higher the stability of the data source.

[0126] S4. Based on the data stability of each data source, merge the data from each data source to determine the final data of the galvanized pipe;

[0127] In some embodiments, data from various data sources can be merged by setting weight allocation to obtain the final galvanized pipe data. In some embodiments, data sources with higher data stability can be given higher weights. Then, data from various data sources are merged according to the weights, thereby effectively suppressing interference from high noise sources and improving detection accuracy.

[0128] In some embodiments, the data fused from the various data sources includes:

[0129] S401. Determine the basic weight of each data source based on the stability index of each data source;

[0130] In some embodiments, a basic weight can be set for each data source based on the stability index of each data source. In some embodiments, the basic weight of the data source is calculated as follows:

[0131] ;

[0132] in, Indicates the first The basic weights of each data source; The number of data sources;

[0133] S402. Determine the adaptive spatial weight of each data source at each measurement location based on the data stability of each data source.

[0134] In some embodiments, adaptive spatial weights are used to describe the dynamic, point-by-point adjustment of the weight of each sensor among various data sources, based on the magnitude of the error of each sensor at the same measurement location. For example, the higher the repeatability of a data source at a certain measurement location, the higher the weight assigned to that data source at that measurement point.

[0135] In some embodiments, the adaptive spatial weights are calculated as follows:

[0136] ;

[0137] in, Indicates the first The data source in the first Adaptive spatial weights for each measurement location;

[0138] S403. Determine the final weight of each data source based on the basic weight of each data source and the adaptive spatial weight of each data source at each measurement location;

[0139] In some embodiments, the final weight of each data source is calculated as follows:

[0140] ;

[0141] in, Show the first The final weight of each data source, This is an empirical coefficient. ;

[0142] S404. Determine the final data of the galvanized pipe based on the final weight of each data source;

[0143] In some embodiments, after determining the final weight of each data source, the final data of the galvanized pipe can be determined by weighted summation.

[0144] The final data for determining the galvanized pipe includes:

[0145] The deviation value for each measurement location is determined based on the final weight of each data source;

[0146] In some embodiments, the deviation value of each measurement location is calculated as follows:

[0147] ;

[0148] in, for Deviation value at;

[0149] The deviation sequence of the galvanized pipe is determined based on the deviation value at each measurement location;

[0150] In some embodiments, the galvanized pipe deviation sequence is a sequence of deviation values ​​at each measurement location arranged in the measurement order. The measurement order can be either forward or reverse.

[0151] The specific method is as follows:

[0152] ;

[0153] As an example, suppose the detection mechanism 2 has 3 displacement sensors 27 and 3 data sources. The detection mechanism 2 rotates at a constant speed along the galvanized pipe opening 5 times, and the data from the data sources is repeated 5 times. The results are: ; The test results are shown in Table 1 below.

[0154] Table 1 Data source test results

[0155]

[0156] Basic weight calculation:

[0157]

[0158]

[0159]

[0160] Spatial weight calculation:

[0161] set up The test results at the location are shown in Table 2 below:

[0162] Table 2 Test results at the location

[0163]

[0164]

[0165]

[0166]

[0167] Final weight calculation:

[0168]

[0169]

[0170]

[0171] Table 3 Data fusion results

[0172]

[0173] ;

[0174] get The deviation at each location is 1.1840 mm. By arranging the deviations at each location, a deviation sequence for the galvanized pipe is obtained.

[0175] S5. Determine the cut surface slope based on the final data of the galvanized pipe;

[0176] In some embodiments, after determining the galvanized pipe deviation sequence, the galvanized pipe cutting surface slope can be calculated based on the maximum offset value in the galvanized pipe deviation sequence.

[0177] In some embodiments, determining the cut surface angle includes:

[0178] S501. Extract the maximum deviation value from the galvanized pipe deviation sequence;

[0179] The specific method is as follows:

[0180] ;

[0181] ;

[0182] It is understandable that after determining the testing benchmark and obtaining the galvanized pipe deviation sequence, there are two sets of maximum deviation values ​​in the sequence, which are located on both sides of the testing benchmark.

[0183] S502. Calculate the cutting surface slope based on the maximum deviation value:

[0184] The specific method is as follows: ;

[0185] in, This refers to the bevel angle of the cutting surface.

[0186] Finally, it should be noted that the embodiments disclosed in this invention are merely preferred embodiments of this invention and are only used to illustrate the technical solutions of this invention, not to limit it. Although this invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this invention.

Claims

1. A device for detecting the bevel angle of a galvanized pipe cut surface, characterized in that, include: A centering mechanism, a detection mechanism coaxially arranged with the centering mechanism, and a power mechanism connected to the detection mechanism; The centering mechanism includes: a connecting shaft, a connecting sleeve and a movable sleeve disposed on the connecting shaft, a first rotating arm and a second rotating arm connected to the connecting sleeve, a third rotating arm connected to the movable sleeve, and a finding plate connected to the first rotating arm and the second rotating arm respectively. The third rotating arm is also connected to the middle part of the first rotating arm and the second rotating arm. It also includes a pneumatic assembly, which, after abutting against the movable sleeve, is used to drive the movable sleeve to slide towards the connecting sleeve, thereby opening the first rotating arm and the second rotating arm until the plate abuts against the inner wall of the galvanized pipe. The pneumatic assembly includes: a cylinder, a guide rod and a piston disposed in the cylinder; The cylinder body has an internal cavity, the piston is disposed in the cavity of the cylinder body, and the guide rod is connected to the piston and its two ends pass through the cylinder body; One end of the guide rod is provided with an air injection channel, and the middle part is provided with an air injection hole that communicates with the air injection channel. The air injection hole is connected to the cavity of the cylinder. The detection mechanism includes: a first fixed base, a bonding roller disposed on the first fixed base, a first guide rod and a second guide rod connected to the first fixed base, a sliding iron core connected to the first guide rod and the second guide rod, a pressure plate connected to the sliding iron core and the bonding roller, and a displacement sensor adapted to the sliding iron core. The first fixed seat is sleeved on the pneumatic component and rotatably connected to the pneumatic component via a bearing; The bonding roller, after coming into contact with the galvanized pipe opening, is used to obtain the deviation of the pipe opening relative to the vertical cutting surface during rotation. The displacement sensor is adapted to the sliding iron core and is used to obtain the displacement of the sliding iron core. The detection mechanism further includes a second reset spring, which is disposed on the second guide rod, with one end abutting against the sliding iron core, and is used to limit the sliding iron core.

2. The galvanized pipe cut surface slope detection device according to claim 1, characterized in that, The cavity in the cylinder located on the side where the piston is connected to the air injection port is a pressure chamber; the pressure chamber is used to push the piston and guide rod to move as a whole after the gas pressure medium is injected.

3. The galvanized pipe cut surface slope detection device according to claim 2, characterized in that, The connecting shaft is also provided with a connecting channel. The end of the guide rod away from the air injection channel is located in the connecting channel. After the end of the guide rod away from the air injection channel abuts against the movable sleeve, it pushes the movable sleeve to slide towards the connecting sleeve.

4. The galvanized pipe cut surface slope detection device according to claim 1, characterized in that, The detection mechanism comprises multiple sets of bonding rollers, first guide rods, second guide rods, sliding iron cores, pressure plates, and displacement sensors. The detection mechanism further includes: a second fixed seat coaxially arranged with the first fixed seat, the second fixed seat being connected to the first fixed seat via a connecting plate; The power mechanism includes a motor, a driving wheel mounted on the motor, and a driven wheel meshing with the driving wheel, the driven wheel being sleeved on a second fixed base.

5. A method for detecting the bevel of a galvanized pipe cut surface, characterized in that, The galvanized pipe cut surface slope detection device according to any one of claims 1-4 includes the following steps: Establish testing standards; Obtain data on galvanized pipes; Determine the data stability of each data source based on galvanized pipe data; Based on the stability of data from various data sources, the final data for galvanized pipes is determined by integrating the data from each data source. The cut slope is determined based on the final data of the galvanized pipe.

6. The method for detecting the bevel of a galvanized pipe cut surface according to claim 5, characterized in that, Determining the data stability of each data source includes: Stability index calculated based on galvanized pipe data; The stability index is calculated as follows: ； in, Indicates the A matrix of detection data from multiple data sources. This indicates the first data point in the first lap. Indicates the first lap Data, Indicates the first The first data point in the circle; Indicates the first The first circle One data point; ； in, ; ； in, For the first Stability index of each data source.

7. The method for detecting the bevel of a galvanized pipe cut surface according to claim 5, characterized in that, The data from the various data sources being integrated includes: The basic weight of each data source is determined based on the stability index of each data source. The adaptive spatial weight of each data source at each measurement location is determined based on the data stability of each data source. The final weight of each data source is determined based on the base weight of each data source and the adaptive spatial weight of each data source at each measurement location. The final data for galvanized pipes is determined based on the final weight of each data source.

8. The method for detecting the bevel of a galvanized pipe cut surface according to claim 7, characterized in that, The basic weight of the data source is calculated as follows: ； in, Indicates the The basic weights of each data source; The number of data sources; The adaptive spatial weights are calculated as follows: ； in, Indicates the The data source in the first Adaptive spatial weights for each measurement location; The final weight calculation method for each data source is as follows: ； in, Show the first The final weight of each data source, This is an empirical coefficient. .

9. The method for detecting the bevel of a galvanized pipe cut surface according to claim 8, characterized in that, The final data for determining the galvanized pipe includes: The deviation value for each measurement location is determined based on the final weight of each data source; The deviation value for each measurement position is calculated as follows: ； in, for Deviation value at; The deviation sequence of the galvanized pipe is determined based on the deviation value at each measurement location; The specific method is as follows: ; Determining the cut surface angle includes: Extract the maximum deviation value from the galvanized pipe deviation sequence; The specific method is as follows: ； ； Calculate the cutting surface slope based on the maximum deviation value: The specific method is as follows: ； in, This refers to the bevel angle of the cutting surface.

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