A device and method for detecting the inner diameter of a sleeve with multiple cross-sections and angles.

Abstract

This invention discloses a device and method for detecting the inner diameter of a sleeve at multiple cross-sections and angles. It enables accurate positioning of the sleeve, is easy to operate, and provides simple and quick measurement, yielding more accurate measurement data. The device includes a measuring base plate, on which are mounted a measuring servo mechanism, a measuring fixture mechanism, and a standard part mechanism. The measuring servo mechanism has a floating probe, which can move horizontally and vertically. The measuring fixture mechanism is used to position the sleeve and can rotate it. The measuring fixture mechanism and the measuring servo mechanism work together to enable the floating probe to detect the inner diameter of the sleeve at different depths and angles. The measuring fixture mechanism and the standard part mechanism work together to calibrate the floating probe. The rotation axis of the measuring fixture mechanism, the axis of the standard part mechanism, and the axis of the floating probe are located on the same plane, which is parallel to the horizontal movement trajectory of the measuring servo mechanism.

Description

Technical Field

[0001] This invention relates to the field of automated testing technology, and in particular to a device and method for detecting the diameter of a sleeve inner hole with multiple cross sections and angles. Background Technology

[0002] The sleeve is an important part of the finished gun, serving as a connecting link. The inner hole of the sleeve is press-fitted with the outer circle of the barrel to form a locking dimension after pressing. If the interference is too small, the barrel may loosen. If the interference is too large, the sleeve may crack. Both of these can lead to safety malfunctions in the use of the firearm.

[0003] Current conventional measurement methods:

[0004] 1. Using rigid plug gauges in groups for qualitative judgment has problems such as outdated testing methods, inability to perform quantitative testing and statistical analysis, high labor intensity of manual operation of rigid gauges, and significant influence from human factors.

[0005] 2. Sending the samples to the metrology center for testing using instruments such as coordinate measuring machines has problems such as low testing efficiency and unsuitability for mass production;

[0006] 3. Quantitative inspection using vision systems such as industrial cameras (CCD) can only detect the diameter of the opening of the sleeve's inner hole, not the diameter inside the sleeve's inner hole. Due to the influence of the on-site operating environment and the surface quality of the parts, the inspection data may be unreliable.

[0007] Therefore, how to design an automated detection device that is easy to operate, accurate in measurement, and highly efficient in detection has become a technical challenge in this field. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a detection device and method for multi-section and multi-angle of the inner diameter of the sleeve, which can accurately position the sleeve, is easy to operate, and is simple and quick to measure. Moreover, it can automatically quantify and detect the diameter of the inner hole of the sleeve at different sections and at different angles of the same section, so as to obtain more accurate measurement data.

[0009] The objective of this invention is achieved as follows:

[0010] A multi-section, multi-angle detection device for the inner diameter of a sleeve includes a measuring base plate. A measuring servo mechanism, a measuring fixture mechanism, and a standard part mechanism are mounted on the measuring base plate. The measuring servo mechanism has a floating probe and can drive the floating probe to move horizontally and vertically. The measuring fixture mechanism is used to position the sleeve and can drive the sleeve to rotate. The measuring fixture mechanism and the measuring servo mechanism cooperate to enable the floating probe to detect the inner diameter of the sleeve at different depths and angles. The measuring fixture mechanism and the standard part mechanism cooperate to calibrate the floating probe.

[0011] The rotation axis of the measuring tooling mechanism, the axis of the standard parts mechanism, and the axis of the floating probe are located on the same plane, which is parallel to the horizontal movement trajectory of the measuring servo mechanism.

[0012] Preferably, the measurement servo mechanism includes a Z-axis servo motor, a displacement sensor, a floating probe buffer plate, a floating probe, a Z-axis guide rail, a support plate, an X-axis servo motor, an X-axis guide rail, and a plate. The plate is mounted on a measurement base plate, and the X-axis guide rail and X-axis servo motor are mounted on the plate. The support plate is fitted onto the X-axis guide rail, and the X-axis servo motor is connected to the support plate. The X-axis servo motor drives the support plate to move along the X-axis. The support plate is mounted on a Z-axis guide rail and a Z-axis servo motor, and the floating probe buffer plate is fitted onto the Z-axis guide rail. The Z-axis servo motor is connected to the floating probe buffer plate, and the Z-axis servo motor drives the floating probe buffer plate to move along the Z-axis. A floating probe is mounted at the lower end of the floating probe buffer plate, and a displacement sensor is mounted at the upper end of the floating probe buffer plate. The displacement sensor detects the position of the floating probe along the Z-axis.

[0013] Preferably, the measuring fixture mechanism includes a laser sensor, a sleeve positioning fixture, an inductive sensor, a mounting base, a fixture servo motor, a cylinder, a sleeve positioning pin, and a rotating platform. The mounting base is mounted on a measuring base plate. The rotating platform, fixture servo motor, cylinder, and laser sensor are mounted on the mounting base. The fixture servo motor is poweredly connected to the rotating platform and drives the rotating platform to rotate. The sleeve positioning fixture and inductive sensor are mounted on the rotating platform. The sleeve positioning fixture has an inner cavity whose shape matches the sleeve's outline. The sleeve positioning fixture is used for axial and circumferential positioning of the sleeve. The inductive sensor is used to mark the starting position of the rotating platform's rotation and detect the rotation angle of the rotating platform. An inductive sensor is set at the bottom of the sleeve positioning fixture. The inductive sensor is used to detect whether the sleeve is installed in place. A sleeve positioning pin is mounted on the cylinder. The sleeve positioning pin is used to insert into the positioning hole on the sleeve under the action of the cylinder to lock the sleeve. The laser sensor is used to detect whether there is a sleeve part.

[0014] Preferably, the rotating platform is mounted above the mounting base, and the tooling servo motor is mounted below the mounting base. The measuring base plate is provided with clearance holes for the tooling servo motor to connect to the rotating platform.

[0015] Preferably, a vertical plate is provided on the side of the mounting base, and the cylinder and laser sensor are both mounted on the vertical plate.

[0016] Preferably, the standard part mechanism includes a standard ring gauge, a standard part cover, and a standard part seat. The standard part seat is mounted on a measuring base plate, and the standard part cover is mounted on the standard part seat. There is a mounting cavity for the standard ring gauge between the standard part seat and the standard part cover. The standard ring gauge is used to calibrate the size of the floating probe, and the standard part cover is provided with a through hole for the floating probe.

[0017] A detection method for a multi-section, multi-angle detection device for the inner diameter of a sleeve includes the following steps:

[0018] Step 1: Place the sleeve into the measuring fixture mechanism. The laser sensor determines whether there is a sleeve part, and the inductance sensor determines whether the sleeve is in contact with the bottom plane of the positioning fixture, that is, whether the sleeve is installed in place. When the laser sensor determines that there is a sleeve part and the inductance sensor at the bottom of the measuring fixture determines that the sleeve is installed in place, the sleeve positioning pin extends to perform circumferential positioning of the sleeve. At this point, the measuring fixture mechanism completes the positioning of the sleeve before inspection.

[0019] Step 2: The measuring servo mechanism drives the floating probe to move in the X-axis direction. When it moves above the standard part mechanism, it stops moving. Then, the measuring servo mechanism drives the floating probe to move in the Z-axis direction, so that the floating probe enters the inner hole area of ​​the ring gauge in the standard part mechanism. The actual inner diameter of the ring gauge is D0. The value D1 detected by the floating probe is corrected to the actual value D0 of the standard ring gauge. At this point, the size calibration of the floating probe is completed.

[0020] Step 3: The measuring servo mechanism drives the floating probe to move in the Z-axis direction, leaving the inner hole area of ​​the ring gauge. Then, the measuring servo mechanism drives the floating probe to move in the X-axis direction, returning to the top of the sleeve. Then, the measuring servo mechanism drives the floating probe to move in the Z-axis direction, so that the floating probe enters the inner hole area of ​​the sleeve, and performs the measurement of the inner hole diameter of the sleeve at the first section at the set depth.

[0021] Step 4: The measuring fixture mechanism drives the sleeve to rotate at the first angle. After the rotation is in place, the measuring fixture mechanism stops. The floating probe in the measuring servo mechanism detects the inner diameter of the sleeve at the first angle. According to the actual detection needs, the servo rotation platform is set to drive the sleeve to rotate at the second, third, ..., nth angles, and detects the inner diameter of the sleeve at the nth angle. Thus, the diameter detection of the first section of the sleeve's inner hole at different angles is completed.

[0022] Step 5: The measuring servo mechanism drives the floating probe to move in the Z-axis direction, and moves to the 2nd, ..., nth section of the inner hole of the sleeve. The floating probe detects the diameter of the inner hole of the sleeve under the section. Repeat step 4 to complete the diameter detection of the 2nd, ..., nth sections at different angles.

[0023] Step 6: Based on the detection results from Steps 3 to 5, perform fitting calculations to obtain the final quantitative detection results, and determine whether the detection results are qualified.

[0024] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0025] This invention uses a measuring fixture to fix the sleeve part, and then a servo motor drives the floating probe to move in the X and Z axes. A calibration device completes the dimensional calibration of the floating probe. After the floating probe is calibrated, the servo motor drives the floating probe to move in the Z and X axes to complete the diameter detection of the inner hole of the sleeve at different depths (sections). The measuring fixture drives the sleeve to rotate at any angle of 360°, thereby realizing the diameter detection of the inner hole of the sleeve at different angles. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the sleeve structure being measured;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the measurement servo mechanism;

[0029] Figure 4 This is a schematic diagram of the measuring tooling mechanism;

[0030] Figure 5 This is a structural diagram of a standard parts mechanism;

[0031] Figure 6 This is a structural schematic diagram of the measuring base plate.

[0032] Figure Labels

[0033] In the attached diagram, 1-measuring servo mechanism; 2-measuring tooling mechanism; 3-standard parts mechanism; 4-measuring base plate;

[0034] 11-Z-axis servo motor; 12-Drag chain; 13-Displacement sensor; 14-Floating probe buffer plate; 15-Floating probe; 16-Z-axis guide rail; 17-Support plate; 18-X-axis servo motor; 19-Z-axis guide rail; 20-Plate.

[0035] 21-Laser sensor; 22-Sleeve; 23-Sleeve positioning fixture; 24-Inductive sensor; 25-Mounting base; 26-Servo motor; 27-Cylinder; 28-Sleeve positioning pin; 29-Rotating platform.

[0036] 31-Standard ring gauge; 32-Standard part cover; 33-Standard part seat. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] like Figure 2 The device shown is for detecting the diameter of a sleeve's inner hole at multiple cross-sections and angles. It includes a measuring servo mechanism 1, a measuring fixture mechanism 3, a standard part mechanism 2, and a measuring base plate 4. The measuring servo mechanism 1 is equipped with a floating probe, which can move horizontally and vertically, enabling periodic calibration of the floating probe and detection of the sleeve's inner hole diameter at different cross-sections. The measuring fixture mechanism 3 accurately positions the sleeve component and can rotate it 360° at any angle, allowing for detection of the inner hole diameter at different angles within the same cross-section. The standard part mechanism 2 is used to calibrate the floating probe on the measuring servo mechanism. The measuring base plate 4 connects and secures all the mechanisms. This detection device enables automated and precise detection of the inner hole diameter of sleeves at multiple cross-sections and angles.

[0039] like Figure 3The measurement servo mechanism shown includes a Z-axis servo motor 11, a cable chain 12, a displacement sensor 13, a floating probe buffer plate 14, a floating probe 15, a Z-axis guide rail 16, a support plate 17, an X-axis servo motor 18, an X-axis guide rail 19, and a flat plate 20. The Z-axis guide rail 16 is mounted on the support plate 17. The floating probe buffer plate 14 is connected to the Z-axis guide rail 16, and the floating probe 15 is mounted on the floating probe buffer plate 14. This allows the floating probe 15 to move along the Z-axis guide rail 19, driven by the Z-axis servo motor 11, enabling the floating probe 15 to detect the diameter of different depths (sections) of the inner hole of the sleeve. The displacement sensor 13 is installed above the floating probe 15 to detect the movement position of the floating probe 15. The X-axis guide rail 19 is installed on the plate 20. The X-axis servo motor 18 drives the support plate 17 to move the floating probe 15 along the X-axis guide rail 19 in the X-axis direction. The plate 20 is connected to the measuring base plate 4.

[0040] like Figure 4 The measuring fixture shown includes a laser sensor 21, a sleeve 22, a sleeve positioning fixture 23, an inductive sensor 24, a mounting base 25, a fixture servo motor 26, a cylinder 27, a sleeve positioning pin 28, and a rotating platform 29. The sleeve 22 is installed on the sleeve positioning fixture 23, and the sleeve positioning pin 28 is installed on the cylinder 27. The laser sensor 21 detects whether the sleeve 22 is installed in place. After installation, the cylinder 27 drives the sleeve positioning pin 28 to insert into the sleeve positioning groove to realize the measurement and positioning of the sleeve 22. The sleeve positioning fixture 23 and the inductive sensor 24 are both installed on the rotating platform 29. The rotating platform 29 is connected to the fixture servo motor 26, so that the fixture servo motor 26 drives the rotating platform 29 to rotate the sleeve at any angle of 360°. This enables the detection of the diameter of the inner hole of the sleeve 22 at different angles at the same depth (section). The inductive sensor 24 marks the starting position of the rotation of the rotating platform 29 to ensure the accuracy of the relative position of the rotation angle. The rotating platform 29 is installed on the mounting base 25, which is connected to the measuring base plate 4.

[0041] like Figure 5 The standard component mechanism shown includes a standard ring gauge 31, a standard component cover 32, and a standard component seat 33. The standard ring gauge 31 is made of a high wear-resistant and high-hardness material with high dimensional accuracy and is used for dimensional calibration of the floating probe 15. The standard ring gauge 31 is installed inside the standard component cover 32, the standard component cover 32 is installed on the standard component seat 33, and the standard component seat 33 is connected to the measuring base plate 4.

[0042] like Figure 6 The measuring base plate shown is used to fix the measuring servo mechanism 1, the measuring tooling mechanism 2, and the standard parts mechanism 3, so as to achieve fastening and mutual cooperation between the mechanisms.

[0043] The measurement process of this invention:

[0044] First, the sleeve part is placed manually or by a robotic arm into the sleeve positioning fixture within the measuring fixture mechanism of the testing device. A laser sensor positioned above the positioning fixture determines the presence of the sleeve part. Then, an inductive sensor positioned at the bottom of the fixture determines whether the sleeve is aligned with the bottom plane of the positioning fixture, i.e., whether the sleeve is properly installed. When the laser sensor detects the presence of the sleeve part and the inductive sensor at the bottom of the fixture confirms proper installation, the sleeve positioning pin extends to perform circumferential positioning of the sleeve. At this point, the measuring fixture mechanism completes the pre-test positioning of the sleeve. The measuring fixture machine...

[0045] Precisely position the joint sleeve part before detecting it. Then, the detection device measures that the servo mechanism drives the floating probe head using a servo motor to move in the X-axis direction. When it moves above the standard part mechanism, it stops moving. Then, the servo motor drives the floating probe head to move in the Z-axis direction, so that the floating probe head enters the ring gauge in the standard part mechanism. Among them, the actual inner diameter size of the ring gauge is D0, and the measured value D1 of the floating probe head is corrected to the actual value D0 of the standard ring gauge. Thus, the size calibration of the floating probe head is completed. After completing the size calibration of the floating probe head, the measurement servo mechanism drives the floating probe head to move in the Z-axis direction to leave the inner hole area of the standard part. Then, the servo motor drives the floating probe head to move in the X-axis direction and returns to the measurement position above the joint sleeve part. Then, the servo motor drives the floating probe head to move in the Z-axis direction, so that the floating probe head enters the inner hole of the joint sleeve to measure the diameter of the inner hole of the joint sleeve at the first cross-section at a specific depth. Then, the servo rotation platform in the measurement tooling mechanism drives the joint sleeve part to rotate at the first angle. After rotating in place, the servo rotation table stops moving, and the floating probe head in the measurement servo mechanism detects the diameter of the inner hole of the joint sleeve at the first angle. According to the actual detection needs, set the servo rotation platform to drive the joint sleeve part to rotate at the second, third,..., n angles. After each angle rotates in place, the servo rotation platform stops moving, and the floating probe head in the measurement servo mechanism detects the diameter of the inner hole of the joint sleeve at the nth angle. Thus, the diameter detection of the inner hole of the joint sleeve at different angles of the same cross-section is completed. Then, the measurement servo mechanism drives the floating probe head to continue moving in the Z-axis direction to the second cross-section of the inner hole of the joint sleeve, and the floating probe head detects the diameter of the inner hole of the joint sleeve under this cross-section. And so on, the floating probe head can detect the diameters of different cross-sections of the inner hole of the joint sleeve. Under different cross-sections, the above steps can be repeated to achieve the diameter detection of the inner hole of the joint sleeve at different angles under this cross-section. After the measurement is completed, the control system performs fitting calculations based on the detection results of the inner hole diameters of the joint sleeve at multiple cross-sections and multiple angles, gives the final quantified detection results, and determines whether the detection results are qualified. Finally, the measurement servo mechanism drives the floating probe head to move upward along the Z-axis to be away from the inner hole of the joint sleeve. The joint sleeve positioning pin in the measurement tooling mechanism automatically withdraws from the joint sleeve part, and the joint sleeve part is taken off manually or by a robotic arm. According to whether the inner hole diameter of the joint sleeve is qualified, it is placed in the corresponding area.

[0046] This invention enables the calibration of a floating probe and the detection of the inner hole size of a sleeve through a translation mechanism. It also utilizes a Z-axis servo motor to detect the diameter of multiple cross-sections of the sleeve's inner hole, a rotary servo motor to detect the diameter of the inner hole at multiple angles, and a displacement sensor to detect the Z-axis position of the probe, a laser sensor to determine if the sleeve parts are properly clamped, and an inductive sensor to detect the rotation angle of the rotating platform. These features ensure reliable, stable, and accurate detection, ultimately achieving automated detection of the inner hole diameter at multiple cross-sections and angles. This improves detection efficiency and reduces the labor intensity of manual inspection.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A multi-section, multi-angle detection device for the inner diameter of a sleeve, characterized in that: The system includes a measuring base plate, on which a measuring servo mechanism, a measuring fixture mechanism, and a standard parts mechanism are mounted. The measuring servo mechanism has a floating probe and can drive the floating probe to move horizontally and vertically. The measuring fixture mechanism is used to position the sleeve and can drive the sleeve to rotate. The measuring fixture mechanism and the measuring servo mechanism work together to enable the floating probe to detect the inner diameter of the sleeve at different depths and angles. The measuring fixture mechanism and the standard parts mechanism work together to calibrate the floating probe. The rotation axis of the measuring tooling mechanism, the axis of the standard parts mechanism, and the axis of the floating probe are located on the same plane, which is parallel to the horizontal movement trajectory of the measuring servo mechanism. The measurement servo mechanism includes a Z-axis servo motor, a displacement sensor, a floating probe buffer plate, a floating probe, a Z-axis guide rail, a support plate, an X-axis servo motor, an X-axis guide rail, and a flat plate. The flat plate is mounted on a measurement base plate, and the X-axis guide rail and X-axis servo motor are mounted on the flat plate. The support plate is fitted onto the X-axis guide rail, and the X-axis servo motor is connected to the support plate. The X-axis servo motor is used to drive the support plate to move along the X-axis direction. The Z-axis guide rail and Z-axis servo motor are mounted on the support plate, and the floating probe buffer plate is fitted onto the Z-axis guide rail. The Z-axis servo motor is connected to the floating probe buffer plate, and the Z-axis servo motor is used to drive the floating probe buffer plate to move along the Z-axis direction. A floating probe is mounted at the lower end of the floating probe buffer plate, and a displacement sensor is mounted at the upper end of the floating probe buffer plate. The displacement sensor is used to detect the position of the floating probe along the Z-axis direction. The measuring fixture mechanism includes a laser sensor, a sleeve positioning fixture, an inductive sensor, a mounting base, a fixture servo motor, a cylinder, a sleeve positioning pin, and a rotating platform. The mounting base is installed on the measuring base plate. The rotating platform, fixture servo motor, cylinder, and laser sensor are mounted on the mounting base. The fixture servo motor is powered by the rotating platform and drives the rotating platform to rotate. The sleeve positioning fixture and inductive sensor are mounted on the rotating platform. The sleeve positioning fixture has an inner cavity whose shape matches the sleeve's outline. The sleeve positioning fixture is used for axial and circumferential positioning of the sleeve. The inductive sensor is used to mark the starting position of the rotating platform's rotation and detect the rotation angle of the rotating platform. An inductive sensor is installed at the bottom of the sleeve positioning fixture. The inductive sensor is used to detect whether the sleeve is installed in place. A sleeve positioning pin is installed on the cylinder. The sleeve positioning pin is used to insert into the positioning hole on the sleeve under the action of the cylinder to lock the sleeve. The laser sensor is used to detect the presence or absence of the sleeve part.

2. The detection device for the inner diameter of a sleeve with multiple cross-sections and angles according to claim 1, characterized in that: The rotating platform is mounted above the mounting base, and the tooling servo motor is mounted below the mounting base. The measuring base plate is provided with clearance holes for the tooling servo motor to connect to the rotating platform.

3. The detection device for the inner diameter of a sleeve with multiple cross-sections and angles according to claim 1, characterized in that: A vertical plate is provided on the side of the mounting base, and the cylinder and laser sensor are both mounted on the vertical plate.

4. The detection device for the inner diameter of a sleeve with multiple cross-sections and angles according to claim 1, characterized in that: The standard part mechanism includes a standard ring gauge, a standard part cover, and a standard part seat. The standard part seat is mounted on a measuring base plate, and the standard part cover is mounted on the standard part seat. There is a mounting cavity for the standard ring gauge between the standard part seat and the standard part cover. The standard ring gauge is used to calibrate the size of the floating probe. The standard part cover is provided with a through hole for the floating probe.

5. A detection method using the multi-section, multi-angle detection device for the inner diameter of the sleeve as described in claim 1, characterized in that, Includes the following steps: Step 1: Place the sleeve into the measuring fixture mechanism. The laser sensor determines whether there is a sleeve part, and the inductance sensor determines whether the sleeve is in contact with the bottom plane of the positioning fixture. When the laser sensor determines that there is a sleeve part and the inductance sensor determines that the sleeve is installed in place, the sleeve positioning pin extends to perform circumferential positioning of the sleeve. At this point, the measuring fixture mechanism completes the positioning of the sleeve before inspection. Step 2: The measuring servo mechanism drives the floating probe to move in the X-axis direction. When it moves above the standard part mechanism, it stops moving. Then, the measuring servo mechanism drives the floating probe to move in the Z-axis direction, so that the floating probe enters the inner hole area of ​​the ring gauge in the standard part mechanism. The actual inner diameter of the ring gauge is D0. The value D1 detected by the floating probe is corrected to the actual value D0 of the standard ring gauge. At this point, the size calibration of the floating probe is completed. Step 3: The measuring servo mechanism drives the floating probe to move in the Z-axis direction, leaving the inner hole area of ​​the ring gauge. Then, the measuring servo mechanism drives the floating probe to move in the X-axis direction, returning to the top of the sleeve. Then, the measuring servo mechanism drives the floating probe to move in the Z-axis direction, so that the floating probe enters the inner hole area of ​​the sleeve, and performs the measurement of the inner hole diameter of the sleeve at the first section at the set depth. Step 4: The measuring fixture mechanism drives the sleeve to rotate at the first angle. After the rotation is in place, the measuring fixture mechanism stops. The floating probe in the measuring servo mechanism detects the inner diameter of the sleeve at the first angle. According to the actual detection needs, the servo rotation platform is set to drive the sleeve to rotate at the second, third, ..., nth angles, and detects the inner diameter of the sleeve at the nth angle. Thus, the diameter detection of the first section of the sleeve's inner hole at different angles is completed. Step 5: The measuring servo mechanism drives the floating probe to move in the Z-axis direction, and moves to the 2nd, ..., nth section of the inner hole of the sleeve. The floating probe detects the diameter of the inner hole of the sleeve under the section. Repeat step 4 to complete the diameter detection of the 2nd, ..., nth sections at different angles. Step 6: Based on the detection results from Steps 3 to 5, perform fitting calculations to obtain the final quantitative detection results, and determine whether the detection results are qualified.

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