Flange end face detection method and system

Abstract

The invention discloses a flange end face detection method and system, which relates to the field of flange detection technology, and solves the problem that the original detection method may cause errors due to the oscillation of the flange end face, and the accuracy and comprehensiveness of the end face are not sufficient during relevant detection. The invention adopts a laser tester to detect the left and right sides mutually, so as to identify the feedback scanning lines on the left and right sides, and then identifies the corresponding abnormal points based on the comparison results of the end face data, and finally performs signal display based on the data display of the corresponding abnormal points, and then evaluates the abnormal area of ​​the flange end face based on the specific relevant data display, and then performs numerical analysis based on the evaluated relevant abnormal area to determine the relevant processing signal for external relevant personnel to view. In this flange end face detection method, the detection accuracy can not only be guaranteed, but also the accuracy of the test can be fully guaranteed to ensure the corresponding detection processing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of flange detection, and in particular to a flange end face detection method and system. Background Art

[0002] Flange, also known as flange flange or flange; flange is a part that connects shafts to each other and is used for connection between pipe ends; it is also used as flange on equipment inlet and outlet for connection between two devices, such as reducer flange.

[0003] The application with publication number CN110160442B discloses a flexible measuring tool and its calibration method for visual inspection of the end face of a catheter flange; the measuring tool consists of a slider, a circular boss nut, a claw, a wire reel, a rotating shaft, a handle, a bearing, a top cover, and a base for circumferential positioning of a circular hole on a flange. There are a certain number of visual marking points at the bottom of the measuring tool, which are arranged on the base and the slider respectively; the flexible measuring tool can adjust the extension and contraction of the claw by rotating the handle, so it can adapt to flange end faces of different calibers. After calibrating the marking points, a measuring tool coordinate system at a real scale will be established, which can characterize the normal vector of the flange end face, the center point position, and the circumferential position of the circular hole on the flange. By identifying and three-dimensionally reconstructing the marking points of the end face of the measuring tool instead of the end face of the pipe fitting itself, the detection accuracy of the end face of the catheter flange can be effectively improved.

[0004] When the flange end face is tested for flatness, it is generally based on the corresponding flange end face rotation process to identify whether there is a raised area on the surface to assess whether the flange end face is flat. However, this original detection method will cause errors due to the oscillation of the flange end face. During the relevant detection of the end face, its accuracy and comprehensiveness are not sufficient to achieve a better flange end face detection effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a flange end face detection method and system, which solves the problem that the original detection method may cause errors due to the oscillation of the flange end face, and the accuracy and comprehensiveness of the end face are not sufficient during relevant detection.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A flange end face detection method comprises the following steps:

[0007] S1) Use a relevant laser tester placed in the middle of the flange end face, with laser probes set at symmetrical positions on both sides of the laser tester, and the laser tester can rotate automatically. Based on the adjustment of external relevant personnel, the laser beam of the laser probe is projected at the preset position of the flange end face, and then based on the rotation process of the laser tester, the relevant laser test data is determined. The specific method is as follows:

[0008] S11. Based on the end face displayed by the flange, mutually symmetrical characteristic midlines are determined on both sides of the flange end face, and the lasers emitted by the laser probes on both sides of the laser tester are debugged so that the initial positions of the lasers are aligned with the inner circle points of the characteristic midlines;

[0009] S12, based on the specific position between the inner circle point and the outer circle point of the corresponding feature midline, a corresponding scanning line is generated, wherein the scanning line includes a left scanning line and a right scanning line, and the laser tester controls the lasers emitted by the probes on both sides to move on the corresponding scanning line through a corresponding rotation process;

[0010] S13, based on the specific test process, after completing the relevant scanning process, record the distance data fed back by the rays on both sides of the laser tester to generate relevant laser test data;

[0011] S2) Based on the determined relevant laser test data, the distance parameters fed back by different scanning lines on both sides of the flange are confirmed one by one, the different distance parameters corresponding to different points are locked, and the feedback distance parameter curve of the corresponding scanning line is determined, and the feedback distance parameter curves on both sides are compared. Based on the comparison process, the abnormal point is determined. The specific method is as follows:

[0012] S21, confirm the distance data generated from the inner circle points to the outer circle points of the left scanning line, generate the corresponding feedback distance parameter curve, and then confirm the feedback distance parameter curve of the right scanning line in the same way;

[0013] S22, compare the relevant values ​​of the two sets of feedback distance parameter curves, compare the distance parameters of the same horizontal coordinates, and identify whether the compared distance data are consistent. If they are consistent, no processing is performed. If they are inconsistent, the two sets of points corresponding to the corresponding horizontal coordinates are marked as abnormal points, wherein the two sets of points are respectively located in the left scanning line or the right scanning line;

[0014] S23, determine the total time length T1 of the corresponding scanning line from the inner circle point to the outer circle point, then determine the total time length T2 of the scanning line moving from the inner circle point to the determined abnormal point, determine the length L of the corresponding feature center, use L÷T1=Hj to confirm the lateral distance Hj moved by the corresponding scanning line per unit time, then use Hj×T2=HL to confirm the lateral distance HL moved by the corresponding scanning line when it reaches the abnormal point, based on the determined feature center line, move from the inner circle point of the feature center line to the outer circle point, stop when the moved distance is HL, lock this point and use it as a calibration point, construct a set of virtual circles based on the center of the flange end face and this calibration point, confirm and mark the intersection position of this virtual circle and the scanning lines on both sides, and lock the actual position of the determined abnormal point;

[0015] S24, rotating the flange by one unit node, performing a subsequent test, keeping the position of the laser tester unchanged, performing a second test, identifying and confirming abnormal points, and so on, until the flange end face has rotated all unit nodes, completing the relevant confirmation of all abnormal points on the flange end face, and calibrating them on the flange end face based on the determined actual position;

[0016] S3) Mark the relevant area covered by the adjacent abnormal points as the abnormal area, and use trigonometric functions to determine the vertical distance of the corresponding abnormal point based on the relevant feedback distance parameters of the corresponding abnormal point and the relevant angle of the corresponding scanning line when testing the abnormal point. Based on the vertical distance performance of the corresponding abnormal area, determine the real abnormal area. The specific method is as follows:

[0017] S31, prioritize adjacent abnormal points, when the horizontal distance between the corresponding abnormal points is less than Y1, it means that the two groups of abnormal points are adjacent abnormal points, where Y1 is a preset value, based on the adjacent abnormal points confirmed one by one, mark the maximum area covered by such adjacent abnormal points as the abnormal area;

[0018] S32, based on the distance parameter J of the abnormal point in the corresponding abnormal area i , where i represents different abnormal points, and the scanning line angle associated with the same abnormal point is calibrated as D i , using L i =J i ×COSD i Determine the horizontal distance L of this point relative to the plane where the laser tester is located i , and then calculate the horizontal distance value L of all abnormal points in this abnormal area i Confirm one by one and identify the horizontal distance value L of all abnormal points in this abnormal area i Are they consistent? If they are consistent, the abnormal area is marked as a normal area. If they are inconsistent, the abnormal area is marked as a real abnormal area.

[0019] S4), based on the determined real abnormal area, identify the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and based on the relevant difference between the two distances, perform signal display at different levels, specifically in the following manner:

[0020] S41, determining the maximum value Lmax and the minimum value Lmin of the vertical distances of different abnormal points in the real abnormal area, and determining the relevant difference Cz of the vertical distances by using Cz=Lmax-Lmin;

[0021] S42, identify the comparison result of its related difference Cz and the preset value Y2. When Cz>Y2, generate a high abnormal signal and display the signal. Also displayed simultaneously are several groups of vertical distances of different abnormal points in the abnormal area. When Cz≤Y2, generate a low abnormal signal and display the signal. Also displayed simultaneously are several groups of vertical distances of different abnormal points in the abnormal area.

[0022] Preferably, a flange end face detection system comprises:

[0023] The data recording end records the feedback distance data of the laser one by one during the process of the laser tester detecting the flange end face, and generates relevant laser test data;

[0024] The abnormal point confirmation end, based on the determined relevant laser test data, confirms the distance parameters fed back by different scanning lines on both sides of the flange one by one, locks the different distance parameters corresponding to different points, and determines the feedback distance parameter curve of the corresponding scanning line, and compares the feedback distance parameter curves on both sides. Based on the comparison process, the abnormal point is determined;

[0025] At the regional analysis end, the relevant area covered by the adjacent abnormal points is marked as the abnormal area, and the vertical distance of the corresponding abnormal point is determined by trigonometric function based on the relevant feedback distance parameters of the corresponding abnormal point and the relevant angle of the corresponding scanning line when testing the abnormal point. The real abnormal area is determined based on the vertical distance performance of the corresponding abnormal area;

[0026] The signal confirmation end, based on the determined real abnormal area, identifies the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and displays signals of different levels based on the relevant difference between the two distances.

[0027] The present invention provides a flange end face detection method and system. Compared with the prior art, it has the following advantages:

[0028] Beneficial effects:

[0029] The present invention uses a laser tester to perform relevant detection on the surface of the flange end face, and completes the overall detection of the entire flange end face based on relevant distance feedback data. Compared with the original detection method, this method can not only ensure the relevant detection accuracy of the corresponding flange end face, but also facilitate the operation of the operator, without the need to rotate the flange, and there will be no relevant errors caused by rotation oscillation. The accuracy of this type of detection test is higher;

[0030] A laser tester is used to detect the left and right sides mutually to identify the feedback scanning lines on the left and right sides, and then the corresponding abnormal points are identified based on the comparison results of the end face data. Finally, based on the data display of the corresponding abnormal points, the signal is displayed. The laser ranging method is used to identify the flatness display of the flange end face, and then the abnormal area of ​​the flange end face is evaluated based on the specific relevant data display. Based on the evaluated relevant abnormal area, numerical analysis is performed to determine the relevant processing signals for external relevant personnel to view. This flange end face detection method can not only ensure the detection accuracy, but also fully guarantee the test accuracy to ensure the corresponding detection and processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the process of the present invention;

[0032] Figure 2 It is a schematic diagram showing the test scanning line of the laser tester of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1 The present application provides a flange end face detection method, comprising the following steps:

[0036] S1) Use a relevant laser tester placed in the middle of the flange end face, with laser probes set at symmetrical positions on both sides of the laser tester, and the laser tester can rotate automatically. Based on the adjustment of external relevant personnel, the laser beam of the laser probe is projected at the preset position of the flange end face, and then based on the rotation process of the laser tester, the relevant laser test data is determined. The specific method for specific debugging is as follows:

[0037] S11. Combination Figure 2 Based on the end face displayed by the flange, determine the mutually symmetrical characteristic midlines on both sides of the flange end face, and debug the lasers emitted by the laser probes on both sides of the laser tester so that the initial position of the laser is aligned with the inner circle point of the characteristic midline (the characteristic midline is the line between the inner circle point and the corresponding outer circle point, the inner circle point is the point where the corresponding characteristic midline intersects with the inner circle of the flange, and the outer circle point is the point where the corresponding characteristic midline intersects with the outer circle of the flange);

[0038] S12, based on the specific position between the inner circle point and the outer circle point of the corresponding feature midline, a corresponding scanning line is generated, wherein the scanning line includes a left scanning line and a right scanning line, and the laser tester controls the lasers emitted by the probes on both sides to move on the corresponding scanning line through a corresponding rotation process;

[0039] S13. Based on the specific test process, after completing the relevant scanning process (that is, the overall scanning process of the corresponding ray rotating from the inner circle point to the outer circle point), the distance data fed back by the rays on both sides of the laser tester are recorded to generate relevant laser test data. Specifically, the corresponding laser ray is moved along the corresponding scanning line. The specific movement process is set by the operator based on the relevant parameters of the corresponding flange, so that the ray of the corresponding laser tester can be moved along the corresponding scanning line, and the distance data fed back by the corresponding relevant points are recorded in time, so as to determine the corresponding laser test data;

[0040] S2), based on the determined relevant laser test data, the distance parameters fed back by different scanning lines on both sides of the flange are confirmed one by one, the different distance parameters corresponding to different points are locked, and the feedback distance parameter curve of the corresponding scanning line is determined, and the feedback distance parameter curves on both sides are compared, and the abnormal point is determined based on the comparison process, wherein the specific method of determination is:

[0041] S21, confirm the distance data generated from the inner circle point to the outer circle point in sequence on the left scanning line, generate the corresponding feedback distance parameter curve, the vertical coordinate parameter of the curve is the distance data, and the horizontal coordinate represents the point position. When the horizontal coordinate is 0, it represents the inner circle point, and when it is 1, it represents the first point position passed. Then confirm the feedback distance parameter curve of the right scanning line in the same way;

[0042] S22, compare the relevant values ​​of the two groups of feedback distance parameter curves, compare the distance parameters of the same horizontal coordinates, and identify whether the compared distance data are consistent. If they are consistent, no processing is performed. If they are inconsistent, the two groups of points corresponding to the corresponding horizontal coordinates are marked as abnormal points, where the two groups of points are respectively located in the left scanning line or the right scanning line (because the two sides of the flange end face correspond to each other, the inner circle points and the outer circle points confirmed in the scanning process of the scanning lines on both sides are symmetrical points, so the distance values ​​generated in the scanning confirmation process should be consistent. If the numerical feedback of the two is inconsistent, then there must be a group of abnormal points in the corresponding points);

[0043] S23, determine the total time length T1 of the corresponding scanning line from the inner circle point to the outer circle point, then determine the total time length T2 of the scanning line moving from the inner circle point to the determined abnormal point, determine the length L of the corresponding feature center, use L÷T1=Hj to confirm the lateral distance Hj moved by the corresponding scanning line per unit time, then use Hj×T2=HL to confirm the lateral distance HL moved by the corresponding scanning line when it reaches the abnormal point (the so-called lateral distance is the vertical distance moved by the corresponding scanning line from the inner circle to the outer circle), based on the determined feature center line, start moving from the inner circle point of the feature center line to the outer circle point, stop when the moving distance is HL, lock this point and use it as a calibration point, construct a set of virtual circles based on the center of the flange end face and this calibration point, confirm and mark the intersection position of this virtual circle and the scanning lines on both sides, and lock the actual position of the determined abnormal point;

[0044] S24, rotating the flange by one unit node, and performing subsequent tests, with the position of the laser tester unchanged, wherein the unit length of the unit node is a preset length, which is the relevant arc length moved by rotating a certain angle, and then performing a second test to identify and confirm abnormal points, and so on, until the end face of the flange has rotated all unit nodes, completing the relevant confirmation of all abnormal points on the end face of the flange, and calibrating them on the end face of the flange based on the determined actual position;

[0045] Specifically, the scanning rays on both sides are detected based on the same circle surface spreading outward in sequence. Then, during the detection process, the distance fed back by the same circle surface should be consistent. When the distances fed back by the two are inconsistent, it means that there are related abnormal points. Then, after the abnormal point exists, in order to more accurately lock the location of the abnormal point, it can be determined by confirming the associated circle. The specific location of the abnormal point can be determined. The associated circle can be directly determined based on the lateral distance traveled per unit time and the related time confirmed by the corresponding point to construct a related circle, thereby determining the abnormal point based on the related intersection point. Subsequently, the abnormal area can be determined based on the related position of the corresponding abnormal point. When a point is abnormal, there must be an abnormal area due to the involvement and linkage relationship between the planes.

[0046] S3), mark the relevant area covered by the adjacent abnormal points as the abnormal area, and use trigonometric functions to determine the vertical distance of the corresponding abnormal point based on the relevant feedback distance parameters of the corresponding abnormal point and the relevant angle of the corresponding scanning line when testing the abnormal point, and determine the real abnormal area based on the vertical distance performance of the corresponding abnormal area, wherein the specific method of determination is:

[0047] S31, prioritize adjacent abnormal points, when the horizontal distance between the corresponding abnormal points is less than Y1, it means that the two groups of abnormal points are adjacent abnormal points, where Y1 is a preset value, and its specific value is determined by the operator based on experience. Based on the adjacent abnormal points confirmed one by one, the maximum area covered by such adjacent abnormal points is marked as the abnormal area, that is, the maximum range area generated by the connection lines between several groups of adjacent abnormal points;

[0048] S32, based on the distance parameter J of the abnormal point in the corresponding abnormal area i , where i represents different abnormal points, and the scanning line angle associated with the same abnormal point is calibrated as D i , using L i =J i ×COSD i Determine the horizontal distance L of this point relative to the plane where the laser tester is located i , and then calculate the horizontal distance value L of all abnormal points in this abnormal area i Confirm one by one and identify the horizontal distance value L of all abnormal points in this abnormal area i Are they consistent? If they are consistent, the abnormal area is marked as a normal area. If they are inconsistent, the abnormal area is marked as a real abnormal area.

[0049] Specifically, the abnormal points are determined symmetrically. The virtual circle is determined in step S2 to determine the relevant intersection points, and the intersection points are used as the corresponding abnormal points. First, when the abnormal points are confirmed, the distance parameters fed back by the two points are inconsistent. It is very likely that one point feedback is normal and the other point feedback is abnormal, resulting in inconsistent distance parameters fed back by the two points. In this case, the normal points are marked as abnormal points, and the abnormal points need to be processed. Finally, it is necessary to determine whether the corresponding abnormal points are truly abnormal to ensure the accuracy of the judgment in the evaluation process. By analyzing the horizontal distance related to the corresponding area, it can be determined whether the situation shown by the corresponding abnormal area is consistent. When consistent, it means that there is no other change in the value shown in the corresponding area, which means that there is no other abnormal situation. The mark change is carried out in time, and then the real abnormal area is analyzed.

[0050] S4), based on the determined real abnormal area, identifying the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and based on the relevant difference between the two distances, displaying signals of different levels for external personnel to view;

[0051] The specific operation methods are as follows:

[0052] S41, determining the maximum value Lmax and the minimum value Lmin of the vertical distances of different abnormal points in the real abnormal area, and determining the relevant difference Cz of the vertical distances by using Cz=Lmax-Lmin;

[0053] S42, identify the comparison result of the relevant difference Cz and the preset value Y2, wherein the specific value of Y2 is determined by the operator based on experience. When Cz>Y2, a high abnormality signal is generated and the signal is displayed, and the simultaneous display also includes several groups of vertical distances of different abnormal points in the abnormal area. When Cz≤Y2, a low abnormality signal is generated and the signal is displayed, and the simultaneous display also includes several groups of vertical distances of different abnormal points in the abnormal area. External relevant operators can make a final assessment of the relevant situation of the flange based on the required accuracy data of the corresponding flange. Based on such an assessment process, the relevant operators can clearly know the specific detection results of the corresponding flange and the severity determined by the system;

[0054] Specifically, the relevant detection method of this laser tester is adopted to fully guarantee the relevant accuracy of its detection results. The laser ranging method is used to identify the flatness display of the flange end face, and then based on the specific relevant data display, the abnormal area of ​​the flange end face is evaluated. Based on the evaluated relevant abnormal area, numerical analysis is performed to determine the relevant processing signal for external relevant personnel to view. This flange end face detection method can not only obtain relevant guarantees for its detection accuracy, but also fully guarantee the accuracy of the test to ensure its corresponding detection and processing effect.

[0055] Example 2

[0056] A flange end face detection system, comprising:

[0057] The data recording end records the feedback distance data of the laser one by one during the process of the laser tester detecting the flange end face, and generates relevant laser test data;

[0058] The abnormal point confirmation end, based on the determined relevant laser test data, confirms the distance parameters fed back by different scanning lines on both sides of the flange one by one, locks the different distance parameters corresponding to different points, and determines the feedback distance parameter curve of the corresponding scanning line, and compares the feedback distance parameter curves on both sides. Based on the comparison process, the abnormal point is determined;

[0059] At the regional analysis end, the relevant area covered by the adjacent abnormal points is marked as the abnormal area, and the vertical distance of the corresponding abnormal point is determined by trigonometric function based on the relevant feedback distance parameters of the corresponding abnormal point and the relevant angle of the corresponding scanning line when testing the abnormal point. The real abnormal area is determined based on the vertical distance performance of the corresponding abnormal area;

[0060] The signal confirmation end, based on the determined real abnormal area, identifies the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and displays signals of different levels based on the relevant difference between the two distances.

[0061] Some of the data in the above formulas are dimensionless and numerically calculated. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0062] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A flange end face detection method, characterized in that: The following steps are involved: S1), use a laser tester placed in the middle of the flange end face, laser probes are set at symmetrical positions on both sides of the laser tester, and the laser tester can rotate automatically. Based on the adjustment of external relevant personnel, the laser beam of the laser probe is shot at the preset position of the flange end face, and then based on the rotation process of the laser tester, the relevant laser test data is determined; specifically: S11, based on the end face displayed by the flange, mutually symmetrical characteristic midlines are determined on both sides of the flange end face, and the lasers emitted by the laser probes on both sides of the laser tester are debugged to align the initial position of the laser with the inner circle point of the characteristic midline; the characteristic midline is the line between the inner circle point and the corresponding outer circle point, the inner circle point is the point where the corresponding characteristic midline intersects with the inner circle of the flange, and the outer circle point is the point where the corresponding characteristic midline intersects with the outer circle of the flange; S12, based on the specific position between the inner circle point and the outer circle point of the corresponding feature midline, a corresponding scanning line is generated, wherein the scanning line includes a left scanning line and a right scanning line, and the laser tester controls the lasers emitted by the laser probes on both sides to move on the corresponding scanning line through a corresponding rotation process; S13. Based on the specific test process, after completing the relevant scanning process, which is the overall scanning process of the corresponding ray rotating from the inner circle point to the outer circle point, the distance data fed back by the rays on both sides of the laser tester are recorded to generate relevant laser test data; S2), based on the determined relevant laser test data, the distance parameters fed back by different scanning lines on both sides of the flange are confirmed one by one, the different distance parameters corresponding to different points are locked, and the feedback distance parameter curve of the corresponding scanning line is determined, and the feedback distance parameter curves on both sides are compared, and the distance parameters with the same horizontal coordinate are compared. Based on the comparison process, the abnormal point is determined; the vertical coordinate parameter of the feedback distance parameter curve is the distance data, and the horizontal coordinate represents the point. When the horizontal coordinate is 0, it represents the inner circle point, and when it is 1, it represents the first point passed; S3), marking the relevant area covered by the adjacent abnormal points as the abnormal area, and based on the relevant feedback distance parameters of the corresponding abnormal points and the relevant angle of the corresponding scanning line when testing the abnormal points, using trigonometric functions to determine the vertical distance of the corresponding abnormal points, and based on the vertical distance performance of the corresponding abnormal area, determining the real abnormal area; S4), based on the determined real abnormal area, identify the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and based on the relevant difference between the two distances, perform signal display at different levels.

2. A flange end face detection method according to claim 1, characterized in that: In step S2, the specific method of determining the abnormal point is: S21, confirm the distance data generated from the inner circle points to the outer circle points of the left scanning line, generate the corresponding feedback distance parameter curve, and then confirm the feedback distance parameter curve of the right scanning line in the same way; S22, compare the relevant values ​​of the two sets of feedback distance parameter curves, compare the distance parameters of the same horizontal coordinates, and identify whether the compared distance data are consistent. If they are consistent, no processing is performed. If they are inconsistent, the two sets of points corresponding to the corresponding horizontal coordinates are marked as abnormal points, wherein the two sets of points are respectively located in the left scanning line and the right scanning line; S23, determine the total time length T1 of the corresponding scanning line from the inner circle point to the outer circle point, then determine the total time length T2 of the scanning line moving from the inner circle point to the determined abnormal point, determine the length L of the corresponding characteristic centerline, use L÷T1=Hj to confirm the lateral distance Hj moved by the corresponding scanning line per unit time, then use Hj×T2=HL to confirm the lateral distance HL moved by the corresponding scanning line when it reaches the abnormal point, based on the determined characteristic centerline, start moving from the inner circle point of the characteristic centerline to the outer circle point, stop when the moving distance is HL, lock this point and use it as a calibration point, construct a set of virtual circles based on the center of the flange end face and this calibration point, confirm and mark the intersection position of this virtual circle and the scanning lines on both sides, and lock the actual position of the determined abnormal point; S24, rotate the flange one unit node and perform subsequent testing. The position of the laser tester remains unchanged, and then perform a second test to identify and confirm abnormal points. Repeat this process until the flange end face has rotated all unit nodes, completes the relevant confirmation of all abnormal points on the flange end face, and calibrates the flange end face based on the determined actual position.

3. A flange end face detection method according to claim 1, characterized in that: In step S3, the specific method of determining the real abnormal area is: S31, determining adjacent abnormal points, when the horizontal distance between the corresponding abnormal points is less than Y1, it means that the two groups of abnormal points are adjacent abnormal points, where Y1 is a preset value, based on the adjacent abnormal points confirmed one by one, the maximum area covered by such adjacent abnormal points is marked as the abnormal area; S32, based on the distance parameter J of the abnormal point in the corresponding abnormal area i , where i represents different abnormal points, and the scanning line angle associated with the same abnormal point is calibrated as D i , using L i =J i ×COSD i Determine the vertical distance L of this point relative to the plane where the laser tester is located i , and then calculate the vertical distance value L of all abnormal points in this abnormal area i Confirm one by one and identify the vertical distance value L of all abnormal points in this abnormal area i Are they consistent? If they are consistent, the abnormal area is marked as a normal area. If they are inconsistent, the abnormal area is marked as a real abnormal area.

4. A flange end face detection method according to claim 1, characterized in that: In step S4, the specific method of displaying signals at different levels is as follows: S41, determining the maximum value Lmax and the minimum value Lmin of the vertical distances of different abnormal points in the real abnormal area, and determining the relevant difference Cz of the vertical distances by using Cz=Lmax-Lmin; S42. Identify the comparison result of the relevant difference Cz and the preset value Y2. When Cz>Y2, generate a high abnormal signal and display the signal. Also displayed simultaneously are several groups of vertical distances of different abnormal points in the abnormal area. When Cz≤Y2, generate a low abnormal signal and display the signal. Also displayed simultaneously are several groups of vertical distances of different abnormal points in the abnormal area.

5. A flange end face detection system, which operates based on a flange end face detection method according to any one of claims 1 to 4, characterized in that: include; The data recording end records the feedback distance data of the laser one by one during the process of the laser tester detecting the flange end face, and generates relevant laser test data; The abnormal point confirmation end, based on the determined relevant laser test data, confirms the distance parameters fed back by different scanning lines on both sides of the flange one by one, locks the different distance parameters corresponding to different points, and determines the feedback distance parameter curve of the corresponding scanning line, and compares the feedback distance parameter curves on both sides. Based on the comparison process, the abnormal point is determined; At the regional analysis end, the relevant area covered by the adjacent abnormal points is marked as the abnormal area, and the vertical distance of the corresponding abnormal point is determined by trigonometric function based on the relevant feedback distance parameters of the corresponding abnormal point and the relevant angle of the corresponding scanning line when testing the abnormal point. The real abnormal area is determined based on the vertical distance performance of the corresponding abnormal area; The signal confirmation end, based on the determined real abnormal area, identifies the maximum and minimum vertical distances of different abnormal points in the real abnormal area, and displays signals of different levels based on the relevant difference between the two distances.

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