Multi-view vision three-dimensional measurement equipment for complex parts

Abstract

The invention relates to the technical field of three-dimensional measuring equipment, in particular to multi-view three-dimensional measuring equipment for complex parts, which comprises a workbench, a measuring table and a longitudinal support are mounted on the workbench, the measuring table is used for placing the complex parts, and a transverse support is mounted on the longitudinal support. A first measuring assembly facing the complex part is installed on the transverse support, a second measuring assembly facing the complex part is installed on the longitudinal support, at least one of the first measuring assembly and the second measuring assembly is provided with a polarization assembly, and the polarization assembly is used for eliminating reflected light of the complex part in the three-dimensional measuring process. According to the invention, through the synergistic effect of the polarization assembly and the adjustment of the double reflectors, the measurement error caused by light reflection is avoided, the detection limitation of deep holes and irregular holes is broken through, reliable technical support is provided for comprehensive and accurate three-dimensional measurement of complex parts, and the measurement precision is improved. The problem that in the prior art, effective data cannot be obtained due to light reflection and deep holes of parts, and the measurement accuracy of the parts is directly affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional measuring equipment, and in particular to a multi-eye vision three-dimensional measuring equipment for complex parts. Background Art

[0002] Complex components are widely used in aerospace, precision manufacturing, and other fields. Their structures often include numerous curved surfaces, cavities, deep holes, and irregular hole systems. Their complex shapes and extremely high dimensional accuracy requirements pose stringent challenges to measurement technology. 3D measurement technology, as a core means of accurately acquiring these geometric parameters, can rapidly reconstruct 3D models of components through methods such as laser scanning, industrial CT, and structured light imaging, providing data support for quality inspection and reverse engineering.

[0003] However, 3D measurement still faces numerous challenges in practical applications. Reflection is particularly prominent: High-gloss areas on component surfaces can reflect measurement light, interfering with the sensor's signal reception and causing data distortion, resulting in measurement blind spots or errors. This is particularly noticeable on smooth metal surfaces.

[0004] At the same time, deep and irregular holes in complex components present another obstacle to measurement. When the aspect ratio of a deep hole is large, measurement light has difficulty penetrating to the bottom, making it impossible to capture the true topography of the hole's inner wall. The asymmetric structure and complex curvature of irregular holes can disrupt the light's reflection path, significantly reducing the accuracy of measuring critical dimensions within the hole (such as aperture, roundness, and position), or even making it impossible to obtain valid data, directly impacting the assessment of the component's internal structural integrity. To address this issue, we propose a multi-view 3D measurement device for complex components. Summary of the Invention

[0005] Based on the technical problems existing in the background technology, the present invention proposes a multi-eye vision three-dimensional measurement device for complex parts. Through the synergistic effect of the polarizing component and the double reflector adjustment, it not only avoids the measurement error caused by reflection, but also breaks through the detection limitations of deep holes and irregular holes, providing reliable technical support for the comprehensive and accurate three-dimensional measurement of complex parts, and solving the problem in the existing technology that effective data cannot be obtained due to the reflection and deep holes of the parts, which directly affects the measurement accuracy of the parts.

[0006] The present invention provides the following technical solution: a multi-eye vision three-dimensional measurement device for complex parts, comprising a workbench, a measuring table and a longitudinal bracket for placing the complex parts mounted on the workbench, a transverse bracket mounted on the longitudinal bracket, a first measuring component facing the complex parts mounted on the transverse bracket, and a second measuring component facing the complex parts mounted on the longitudinal bracket;

[0007] At least one of the measuring component 1 and the measuring component 2 is provided with a polarizing component, and the polarizing component is used to eliminate reflections of complex parts during the three-dimensional measurement process.

[0008] Preferably, the second measuring component includes a fixed box, a detection window is opened on a side of the fixed box corresponding to the measuring platform, a measuring camera and a reflector 1 and a reflector 2 with adjustable rotation angles are installed in the fixed box, the detection light path of the measuring camera is reflected through the reflector 1 and the reflector 2 to the complex parts on the measuring platform, and the rotation axes of the reflector 1 and the reflector 2 are perpendicular to each other.

[0009] Preferably, a first servo motor is installed in the fixing box, the output shaft of the first servo motor is connected to the reflective mirror 1 and drives it to rotate, and the rotating shaft of the first servo motor is in a vertical state, and is used to perform up and down detection of complex parts by rotating and adjusting the measuring camera;

[0010] A second servo motor is installed in the fixed box. The output shaft of the second servo motor is connected to the second reflector and drives it to rotate. The output shaft of the second servo motor is perpendicular to the output shaft of the first servo motor and is used to rotate and adjust the measuring camera to detect different horizontal positions of complex parts.

[0011] Preferably, an angle sensor 1 is installed at the connection between the output shaft of the first servo motor and the reflector 1, for monitoring the rotation angle of the reflector 1;

[0012] An angle sensor 2 is installed at the connection between the output shaft of the second servo motor and the second reflector for monitoring the rotation angle of the second reflector.

[0013] Preferably, the measuring camera is integrated with a distance measuring component, and the distance measuring component is used to calculate the distance between the surface of the complex component and the measuring camera.

[0014] Preferably, the measuring platform includes a base and a support platform, the support platform is movably mounted on the base, the support platform is rotatably connected to an annular support member outside it, the annular support member is rotatably connected to the base, and the rotation direction of the support platform relative to the annular support member is perpendicular to the rotation direction of the annular support member relative to the base.

[0015] Preferably, the support platform is rotatably connected to the base via a first rotating shaft, and the support platform is rotatably connected to the annular support member via a second rotating shaft, and the first rotating shaft and the second rotating shaft are perpendicular to each other;

[0016] A support plate is fixed to the bottom of the annular support member, and an adjustment rod 1 is rotatably connected to the support plate. The adjustment rod 1 is rotatably connected to the bottom of the support platform. The adjustment rod 1 drives the support platform to rotate relative to the annular support member through telescoping and controls its rotation angle;

[0017] The bottom of the base is rotatably connected to an adjusting rod 2, which is rotatably connected to the support plate or the annular support member. The adjusting rod 2 drives the annular support member and the support platform to rotate relative to the base as a whole through telescoping and controls the rotation angle.

[0018] A first level sensor is installed on the support platform, and a second level sensor is installed on the annular support member.

[0019] Preferably, a magnetic attraction mechanism is installed on the support platform, and the magnetic attraction mechanism is used to fix complex parts made of metal materials through the magnetic attraction principle.

[0020] Preferably, fixing plates are symmetrically installed at the edges of the support platform, and limiting screws for clamping complex parts are provided on the fixing plates.

[0021] Preferably, the polarizing assembly includes a connecting rod and a third servo motor, the connecting rod fixes the third servo motor on the horizontal bracket and is connected to the polarizer through the output shaft of the third servo motor, the third servo motor is used to drive the polarizer to rotate and control the rotation angle of the polarizer to control the coverage of the polarizer on the second probe of the measuring assembly, and an angle sensor three is provided at the connection between the output shaft of the third servo motor and the polarizer, and the angle sensor three is used to monitor the rotation angle of the polarizer.

[0022] This invention provides a multi-view 3D measurement device for complex parts. By installing a polarizing element on either measurement component one or measurement component two, the polarizer's selective light filtering properties effectively eliminate reflection interference from high-gloss areas on the component's surface. When the measurement light strikes a smooth surface such as metal, the polarizing element filters out the reflected polarized light, retaining only the valid signal diffusely reflected from the component's surface. This prevents sensor data distortion caused by reflections, ensures accurate measurement of geometric parameters in high-gloss areas, and eliminates blind spots caused by reflections in traditional measurements.

[0023] The coordinated adjustment of the two reflectors enables the precise multi-angle guidance of the detection light. Reflector 1 and reflector 2 in the measurement component 2 are driven by vertically arranged servo motors respectively. Reflector 1 can rotate in the vertical direction to adjust the upper and lower incident angles of the light so that the measurement light path can penetrate into the bottom of the deep hole; Reflector 2 rotates in the horizontal direction to cooperate with Reflector 1 to change the horizontal projection direction of the light to adapt to the asymmetric structure of the irregular hole. The rotation angle of the two mirrors is monitored in real time by the angle sensor to ensure the accuracy of the light path adjustment. This two-dimensional adjustment mechanism allows the measurement light to flexibly adapt to the complex curved surface of the inner wall of the hole. Regardless of the aspect ratio limitation of the deep hole or the curvature change of the irregular hole, the true morphology of the inner wall of the hole can be captured through the dynamic adjustment of the light angle, and key parameters such as aperture, roundness, and position can be fully obtained, solving the problem that the structure inside the hole is difficult to effectively detect in traditional measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a structural diagram of the second measuring component of the present invention;

[0026] Figure 3 Schematic diagram of the measuring platform structure of the present invention Figure 1 ;

[0027] Figure 4 Schematic diagram of the measuring platform structure of the present invention Figure 2 ;

[0028] Figure 5 This is a plan view of the measuring platform of the present invention;

[0029] Figure 6 Schematic diagram of the polarizing component structure of the present invention Figure 1 ;

[0030] Figure 7 Schematic diagram of the polarizing component structure of the present invention Figure 2 .

[0031] In the figure: 1. Workbench; 2. Measuring table; 21. Base; 22. Support platform; 23. Annular support; 24. Rotating shaft 1; 25. Rotating shaft 2; 26. Support plate; 27. Adjusting rod 1; 28. Adjusting rod 2; 29. ​​Level sensor 1; 210. Level sensor 2; 211. Magnetic mechanism; 212. Fixing plate; 213. Limiting screw; 3. Longitudinal bracket; 4. Horizontal bracket; 5. Measuring component 1; 6. Measuring component 2; 61. Fixing box; 62. Detection window; 63. Measuring camera; 64. Reflector 1; 65. Reflector 2; 66. Distance measuring component; 67. First servo motor; 68. Angle sensor 1; 69. Second servo motor; 610. Angle sensor 2; 7. Polarizing component; 71. Connecting rod; 72. Third servo motor; 73. Polarizer; 74. Angle sensor 3. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the present invention provides a technical solution: a multi-eye vision three-dimensional measurement device for complex parts, comprising a workbench 1, a measuring table 2 for placing complex parts and a longitudinal bracket 3 are installed on the workbench 1, a transverse bracket 4 is installed on the longitudinal bracket 3, a measuring component 1 5 facing the complex parts is installed on the transverse bracket 4, and a measuring component 2 6 facing the complex parts is installed on the longitudinal bracket 3;

[0034] At least one of the measuring component 1 5 and the measuring component 2 6 is provided with a polarizing component 7, and the polarizing component 7 is used to eliminate reflections of complex parts during the three-dimensional measurement process.

[0035] Complex components are placed on the measuring table 2 on the workbench 1. Measuring components 1 5 and 2 6 are secured by longitudinal supports 3 and transverse supports 4 to form a multi-view inspection system. The two measuring components simultaneously capture the component from different angles, stitching the data together using multi-camera vision principles to construct a complete three-dimensional model. At least one measuring component is equipped with a polarizing component 7 that selectively filters light of a specific polarization direction, eliminating interference signals generated by reflections on the component surface. This ensures that the light received by the sensor comes only from diffuse reflections from the component surface, thereby acquiring true topographic data. The longitudinal supports 3 and transverse supports 4 can also be configured to be adjustable, such as allowing for forward and backward movement and rotation relative to the workbench 1.

[0036] Collaborative measurement of multiple components can cover the complex curved surfaces of parts and avoid blind spots from a single perspective. Polarized Component 7 solves the reflection problem from an optical perspective. Compared with traditional physical extinction methods, it is more flexible and can adapt to the reflective characteristics of surfaces of different materials. It is especially suitable for measuring highly reflective parts such as metal. All-round inspection can be completed without frequent adjustment of the part posture, which not only improves measurement efficiency but also reduces errors caused by multiple positioning, providing reliable guarantee for high-precision 3D reconstruction of complex parts.

[0037] like Figure 2 As shown, the second measuring assembly 6 includes a fixed box 61, which has a detection window 62 on one side of the fixed box 61 corresponding to the measuring platform 2. A measuring camera 63, as well as a first reflector 64 and a second reflector 65, each capable of adjusting the rotation angle, are installed within the fixed box 61. The detection light path of the measuring camera 63 is reflected through the first reflector 64 and the second reflector 65 onto the complex component on the measuring platform 2, and the rotation axes of the first reflector 64 and the second reflector 65 are perpendicular to each other. The fixed box 61 faces the measuring platform 2 through the detection window 62, and the detection light path of the internal measuring camera 63 is reflected twice by the first reflector 64 and the second reflector 65 before being projected onto the complex component. Because the rotation axes of the two reflectors are perpendicular to each other, the direction of the light path can be adjusted in different dimensions. The rotation of the first reflector 64 can change the longitudinal angle of the light path, while the rotation of the second reflector 65 can adjust the lateral angle of the light path. Through the coordinated rotation of the two, the incident direction of the detection light can be flexibly changed, so that the light penetrates deep into the hole along the axis of the deep hole and accurately captures the morphology of the inner wall and bottom of the hole.

[0038] The vertical rotation design of the double reflector realizes multi-dimensional adjustment of the optical path, which can adapt to the measurement needs of deep holes of different depths and apertures, and solves the problem that light cannot directly reach the inside of the deep hole in traditional measurement; there is no need to move the measuring camera 63 or parts, and all-round detection of deep holes can be completed only by adjusting the angle of the reflector, reducing the error caused by mechanical adjustment; combined with the polarizing component 7 to eliminate the interference of reflections in the hole, clearer images in the hole can be obtained, providing reliable data support for the measurement of deep hole dimensional accuracy and morphological integrity.

[0039] A first servo motor 67 is installed in the fixed box 61. The output shaft of the first servo motor 67 is connected to the reflector 1 64 and drives it to rotate. The rotation axis of the first servo motor 67 is in a vertical state and is used to rotate and adjust the measuring camera 63 to perform up and down inspections on complex parts.

[0040] A second servo motor 69 is installed in the fixed box 61. The output shaft of the second servo motor 69 is connected to the reflector 2 65 and drives it to rotate. The output shaft of the second servo motor 69 is perpendicular to the output shaft of the first servo motor 67 and is used to rotate and adjust the measuring camera 63 to detect different horizontal positions of complex parts. The first servo motor 67 and the second servo motor 69 in the fixed box 61 are respectively connected to the reflector 1 64 and the reflector 2 65 to provide precise power for the rotation of the reflectors. The rotating shaft of the first servo motor 67 is in a vertical state. When its output shaft rotates, it directly drives the reflector 1 64 to rotate around the vertical axis, thereby changing the longitudinal angle of the detection light path of the measuring camera 63 and realizing the detection and adjustment of the vertical direction of complex parts. For example, when measuring a shaft-like component with a deep hole, the first servo motor 67 drives the reflector 1 64 to rotate, which can tilt the light path upward or downward, allowing the light to penetrate into different height positions in the hole.

[0041] The output shaft of the second servo motor 69 is perpendicular to the output shaft of the first servo motor 67, that is, it is in a horizontal position. When it operates, it drives the second reflector 65 to rotate about the horizontal axis, thereby adjusting the horizontal angle of the detection light path, enabling detection of different horizontal positions of complex components. Still using the example of a shaft component with a deep hole, the second servo motor 69 drives the second reflector 65 to rotate, causing the light path to deflect left and right in the horizontal direction, thereby detecting different aspects of the deep hole's inner wall.

[0042] During the actual measurement process, the first servo motor 67 and the second servo motor 69 work together to precisely control the rotation angles of the reflector 1 64 and the reflector 2 65, so that the detection light path of the measuring camera 63 can be flexibly and accurately projected to various target detection positions of complex parts after two reflections, especially difficult-to-detect areas such as deep holes.

[0043] During the actual measurement process, the first servo motor 67 and the second servo motor 69 work together to precisely control the rotation angles of the reflector 1 64 and the reflector 2 65, so that the detection light path of the measuring camera 63 can be flexibly and accurately projected to various target detection positions of complex parts after two reflections, especially difficult-to-detect areas such as deep holes.

[0044] The use of servo motor drive can achieve precise control of the mirror rotation angle, ensure the accuracy of the optical path adjustment, and thus improve the measurement accuracy. The design of the output shafts of the first servo motor 67 and the second servo motor 69 being perpendicular to each other makes the adjustment of the reflector 1 64 and the reflector 2 65 independent of each other and able to cooperate with each other, which can fully cover the detection needs of complex parts, especially for areas with complex internal structures such as deep holes, and can fully capture the situation inside the hole through flexible adjustment of the optical path. In addition, this structure does not require moving the measuring camera 63 and parts. Multi-directional detection can be completed by only driving the reflector with the servo motor, reducing the error caused by mechanical movement, while improving measurement efficiency, making the three-dimensional measurement of complex parts more convenient and accurate.

[0045] An angle sensor 68 is installed at the connection between the output shaft of the first servo motor 67 and the reflector 64 to monitor the rotation angle of the reflector 64.

[0046] Angle sensor 2 610 is mounted at the junction between the output shaft of second servo motor 69 and second reflector 65 to monitor the rotation angle of second reflector 65. These two angle sensors sense the rotation of the servo motor output shaft and convert the mechanical angle into an electrical signal for feedback, accurately capturing the real-time angle of the reflector and ensuring that the reflector adjusts the optical path to the preset angle.

[0047] By real-time monitoring of the reflector angle, servo motor drive errors can be corrected in a timely manner to ensure the accuracy of optical path adjustment. Especially when measuring deep holes, the incident angle of light can be precisely controlled. No additional calibration process is required, simplifying the operation process. It provides a basis for optical path tracing and data verification, improving the reliability of 3D measurement and ensuring the accuracy of complex component inspection data.

[0048] The measuring camera 63 is integrated with a distance measuring component 66, which is used to calculate the distance between the surface of a complex component and the measuring camera 63. This component (e.g., an HL-G1 series laser distance measuring sensor based on laser triangulation) works in conjunction with the first and second reflectors 64 and 65 to perform three-dimensional measurement of complex components. The distance measuring component 66 emits a laser beam, which is reflected by the first and second reflectors 64 and 65 before being projected onto the surface of the complex component. Upon encountering the surface, the laser beam is reflected, and the reflected light returns along the original optical path and is received by the distance measuring component 66.

[0049] When measuring a part's shape, a first servo motor 67 rotates mirror 1 64 about its vertical axis, adjusting the vertical projection angle of the laser beam. A second servo motor 69 rotates mirror 2 65 about its horizontal axis, changing the horizontal projection direction of the laser beam. With the coordinated rotation of the two mirrors, the laser beam scans the entire surface of the part. The distance measurement component 66 calculates the distance between each point on the part's surface and the measurement camera 63 based on the time or phase difference between the laser's emission and reception. Combining this distance data with the mirror's rotation angle information allows the part's external three-dimensional topography to be constructed.

[0050] To measure the internal structure of a hole, the laser beam is directed deeper into the hole by adjusting the angles of reflectors 1 64 and 2 65. Vertical adjustment of reflector 1 64 allows the laser beam to reach varying depths within the hole, while horizontal adjustment of reflector 2 65 allows scanning of all directions along the hole's inner wall. Distance measurement component 66 calculates the distance between each point on the hole's inner wall and measurement camera 63 in real time. Combined with this angular data, it accurately restores internal structural information, including hole diameter variations, wall flatness, and bottom morphology.

[0051] The integrated distance measurement component 66, combined with dual reflectors, enables integrated measurement of complex component exteriors and internal hole structures, eliminating the need for measuring equipment replacement and streamlining the operational process. The laser distance measurement component 66 offers high measurement accuracy and rapid response, enabling rapid acquisition of a large number of data points, ensuring the richness of detail in the 3D model. By adjusting the reflector angle, the laser beam can flexibly reach various measurement locations on the component, particularly difficult-to-measure areas such as deep and irregular holes, addressing the shortcomings of traditional measuring equipment. Furthermore, the combination of distance measurement data and reflector angle information provides a precise spatial coordinate basis for constructing 3D models, significantly improving measurement accuracy and reliability and providing strong support for quality inspection and reverse engineering of complex components.

[0052] During the mirror rotation process, although the physical distance of the light path will change with the change of the mirror angle, with the help of real-time monitoring data from angle sensor 1 68 and angle sensor 2 610, the change in the light path can be accurately calculated, and then the actual distance between the component and the measurement assembly can be calculated.

[0053] When the first servo motor 67 rotates the reflector 1 64 , the angle sensor 1 68 records its rotation angle. Combined with the fixed distance between the reflector 1 64 and the measuring camera 63 , trigonometric functions can be used to calculate the change in the path length of the light after being reflected by the reflector 1 64 . Similarly, when the second servo motor 69 rotates the reflector 2 65 , the angle data captured by the angle sensor 2 610 is combined with the installation position parameters of the reflector 2 65 to determine the path offset of the light after being reflected by the reflector 2 65 .

[0054] When measuring deep holes, reflector 1 (64) rotates upward to increase the longitudinal length of the optical path, while reflector 2 (65) rotates counterclockwise to alter the horizontal path. These two angles correspond to the longitudinal and horizontal increments of the optical path, respectively. Combining these two changes in the optical path provides the actual total optical path length. This, combined with the original distance data from the distance measurement component (66), corrects the effect of optical path variations on the measurement, ultimately determining the true distance between the component surface and the measurement component, ensuring the coordinate accuracy of the 3D model.

[0055] This optical path compensation mechanism based on angle monitoring allows the device to maintain the accuracy of distance calculation during multi-directional measurement of complex components, even if the optical path changes dynamically due to the rotation of the reflector.

[0056] like Figure 3-5 As shown, the measuring platform 2 includes a base 21 and a support platform 22. The support platform 22 is movably mounted on the base 21. The support platform 22 is rotatably connected to the annular support member 23 outside it. The annular support member 23 is rotatably connected to the base 21, and the rotation direction of the support platform 22 relative to the annular support member 23 is perpendicular to the rotation direction of the annular support member 23 relative to the base 21.

[0057] The base 21 provides stable support for the overall structure. The support platform 22 is movably mounted on the base 21 and rotatably connected to an external annular support member 23. The annular support member 23 forms a rotational fit with the base 21. The support platform 22 rotates left and right relative to the annular support member 23, while the annular support member 23 rotates in pitch relative to the base 21, with the two being perpendicular to each other. When the posture of a complex component needs to be adjusted, the annular support member 23 rotates in pitch relative to the base 21 to change the component's tilt angle and achieve vertical adjustment. At the same time, the support platform 22 rotates left and right relative to the annular support member 23 to adjust the component's left and right orientation on the horizontal plane, completing horizontal angle calibration.

[0058] This two-dimensional rotation design can effectively make up for the detection limitations of the measuring component beyond the adjustment of the reflector angle. When the deep hole of a complex component is facing downward, even if the measuring component adjusts the angle of light by rotating the reflector 1 64 and the reflector 2 65, it may still form a detection blind spot because the light is difficult to penetrate deep into the hole against the direction of gravity. At this time, the component is tilted upward by the pitch rotation of the annular support 23, and the deep hole is adjusted from the downward state to the general direction toward the measuring component, and then the horizontal position of the deep hole is fine-tuned by the left and right rotation of the support platform 22 relative to the annular support 23, so that the axis of the deep hole and the incident direction of the measuring light are kept as consistent as possible, so that the light can enter the hole smoothly. For components with irregular blind spots, such as a valve body with multiple inclined deep holes, each deep hole can be adjusted to the most convenient posture for measurement by coordinating the left and right rotation and pitch rotation of the measuring platform 2, ensuring that the measuring component can capture the complete shape of the hole.

[0059] The support platform 22 is rotatably connected to the base 21 via a first rotating shaft 24, and the support platform 22 is rotatably connected to the annular support member 23 via a second rotating shaft 25, and the first rotating shaft 24 and the second rotating shaft 25 are perpendicular to each other;

[0060] A support plate 26 is fixed to the bottom of the annular support member 23. An adjustment rod 27 is rotatably connected to the support plate 26. The adjustment rod 27 is rotatably connected to the bottom of the support platform 22. The adjustment rod 27 drives the support platform 22 to rotate relative to the annular support member 23 by telescoping and controlling its rotation angle.

[0061] The bottom of the base 21 is rotatably connected to an adjusting rod 28, which is rotatably connected to the support plate 26 or the annular support member 23. The adjusting rod 28 drives the annular support member 23 and the support platform 22 to rotate relative to the base 21 as a whole through telescoping, and controls the rotation angle.

[0062] A level sensor 1 29 is installed on the support platform 22 , and a level sensor 2 210 is installed on the annular support member 23 .

[0063] The dual pivots and dual adjustment levers, combined with a level sensor, enable precise position control of support platform 22. Support platform 22 is pivotally connected to base 21 via pivot 1 24 and to annular support member 23 via pivot 2 25. These pivots are perpendicular to each other, providing the axes for pitch and left / right rotation, respectively.

[0064] To adjust the left-right rotation angle of support platform 22, adjustment rod 1 (27) on support plate 26 at the bottom of annular support member 23 is extended and retracted. Adjustment rod 1 (27) is pivotally connected to support plate 26 and the bottom of support platform 22, respectively. This extension and retraction of adjustment rod 1 (27) rotates support platform 22 around rotation axis 2 (25), thereby achieving left-right angle adjustment. When measuring components with lateral deep holes, adjustment rod 1 (27) extends, rotating support platform 22 to the left, aligning the deep hole opening toward measurement component 1 (5) for easier light entry.

[0065] Adjusting the pitch angle of the support platform 22 utilizes adjustment rod 28 at the bottom of the base 21. The ends of adjustment rod 28 are pivotally connected to the base 21 and support plate 26 (or annular support member 23), respectively. Its extension and retraction drive the annular support member 23 and support platform 22 to rotate about axis 1 24, achieving the desired pitch angle. If the deep hole in a component is facing downward, adjustment rod 28 extends, pushing the annular support member 23 upward, which in turn causes the support platform 22 to tilt upward, shifting the deep hole from a downward-facing position to an upward-facing position, creating a path for the measurement light.

[0066] Adjusting the pitch angle of the support platform 22 utilizes adjustment rod 28 at the bottom of the base 21. The ends of adjustment rod 28 are pivotally connected to the base 21 and support plate 26 (or annular support member 23), respectively. Its extension and retraction drive the annular support member 23 and support platform 22 to rotate about axis 1 24, achieving the desired pitch angle. If the deep hole in a component is facing downward, adjustment rod 28 extends, pushing the annular support member 23 upward, which in turn causes the support platform 22 to tilt upward, shifting the deep hole from a downward-facing position to an upward-facing position, creating a path for the measurement light.

[0067] A level sensor 29 (e.g., an SCA100T inclination sensor) is mounted on the support platform 22. By monitoring the angle between the support platform 22 surface and the horizontal plane, it provides real-time feedback on whether the left and right rotation angles meet the measurement requirements. A level sensor 210 (e.g., an SCA61T) is mounted on the annular support 23 to detect its tilt and reflect the pitch adjustment status. Both sensors are based on MEMS accelerometers, converting the tilt angle into an electrical signal output to ensure that the extension and retraction of the adjustment rod accurately matches the target angle.

[0068] For example, consider measuring a valve body with an inclined deep hole. Initially, the deep hole faces downward. Level sensor 210 detects that the pitch angle of annular support member 23 is insufficient. This feedback signal causes adjustment rod 28 to extend, rotating annular support member 23 upward around axis 1 24 until the pitch angle indicated by level sensor 210 reaches the preset value, tilting the deep hole upward. Level sensor 1 29 then detects a left-right angular deviation of support platform 22. Adjustment rod 1 27 retracts, rotating support platform 22 clockwise around axis 2 25, stopping when level sensor 1 29 indicates the left-right angles are aligned. At this point, the deep hole's opening faces the measurement assembly, allowing light, adjusted by a reflector, to enter the hole smoothly, completing the measurement. The entire process, controlled by the mechanical drive of the adjustment rod and real-time monitoring by the sensor, forms a closed-loop control, ensuring precise attitude adjustment.

[0069] like Figure 3 As shown, a magnetic attraction mechanism 211 is installed on the support platform 22, and the magnetic attraction mechanism 211 is used to fix complex parts made of metal materials through the magnetic attraction principle. Figure 4 As shown, a fixing plate 212 is symmetrically installed at the edge of the support platform 22, and a limiting screw 213 for clamping complex parts is provided on the fixing plate 212.

[0070] The support platform 22's securing function is achieved through the coordinated efforts of a magnetic mechanism 211 and a limiting screw 213, adapting to components of varying materials and shapes. Utilizing the principle of magnetic attraction, the magnetic mechanism 211 generates a magnetic field through an internal magnet, creating an attractive force for complex metal components, enabling rapid securing without the need for additional clamping. This mechanism is suitable for metal components with smooth surfaces and no magnetic interference, such as steel gears.

[0071] A stop screw 213 is installed on the fixing plate 212 at the edge of the support platform 22. Rotating the screw pushes its end against the component, securing non-magnetic materials (such as plastic or ceramic) or irregularly shaped components through mechanical clamping force. When measuring plastic valve bodies with raised structures, rotating the stop screw 213 to contact the component surface prevents component shifting during measurement platform 2 rotation and ensures stable positioning. Either method can be used as needed to ensure component stability during measurement.

[0072] like Figure 6 and 7 As shown, the polarizing assembly 7 includes a connecting rod 71 and a third servo motor 72. The connecting rod 71 fixes the third servo motor 72 on the horizontal bracket 4 and is connected to the polarizer 73 through the output shaft of the third servo motor 72. The third servo motor 72 is used to drive the polarizer 73 to rotate and control the rotation angle of the polarizer 73 to control the coverage of the polarizer 73 on the probe of the measuring assembly 2 6. An angle sensor 3 74 is provided at the connection between the output shaft of the third servo motor 72 and the polarizer 73. The angle sensor 3 74 is used to monitor the rotation angle of the polarizer 73. The angle sensor 3 74 and the angle sensor 1 68 and the angle sensor 2 610 are all based on the same angle detection principle (such as magnetoresistive or photoelectric), and convert the monitored output shaft rotation angle into an electrical signal for feedback.

[0073] A third servo motor 72 is secured to the transverse bracket 4 via a connecting rod 71. The output shaft of the third servo motor 72 is connected to a polarizer 73. During operation, the third servo motor 72 rotates the polarizer 73 according to measurement requirements, precisely controlling its rotation angle to adjust the coverage and angle of the polarizer 73 for the probe of measurement assembly 2 6. When measurement assembly 2 6 inspects complex components, the polarizer 73 rotates to adjust its polarization direction, selectively filtering reflected light at specific angles and allowing only diffusely reflected light from the component surface to enter the measurement probe, thereby eliminating interference from reflections from different locations and materials.

[0074] The polarizer 73 driven by the third servo motor 72 can dynamically adapt to the complex surface of the component and adjust the polarization angle in real time according to the reflective characteristics of different areas. Compared with the fixed polarization structure, it has a wider range of applicability. By precisely controlling the coverage range, it can avoid reflections while ensuring sufficient entry of effective measurement light to ensure detection accuracy. There is no need to manually adjust the position of the polarizer 73, and the degree of automation is high. In conjunction with the multi-eye vision system, the measurement efficiency and adaptability are further improved, which is especially suitable for the diverse reflective scenarios of complex components.

[0075] In the present invention, the design of the measuring platform 2 is coordinated with the angle adjustment of the reflector of the measuring component to construct a dual flexible detection system for component posture adjustment and light angle adaptation, which greatly reduces the probability of detection blind spots caused by the component's own structure; the left and right rotation of the support platform 22 and the pitch rotation of the annular support 23 are perpendicular to each other, which can realize the full-dimensional posture adjustment of the component in three-dimensional space and adapt to the measurement needs of various complex special-shaped holes and deep holes; there is no need to manually move the parts, and the posture calibration can be completed through mechanical rotation, which reduces the positioning error caused by manual operation. Combined with the angle sensor's precise monitoring of the rotation angle, the component posture adjustment accuracy and the optical path calculation of the measuring component can be linked to form data, further improving the accuracy and reliability of the overall measurement, and providing a more complete solution for the comprehensive detection of complex parts.

[0076] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-eye vision three-dimensional measuring device for complex parts, comprising a workbench (1), characterized in that: The workbench (1) is provided with a measuring table (2) for placing complex parts and a longitudinal bracket (3), the longitudinal bracket (3) is provided with a transverse bracket (4), the transverse bracket (4) is provided with a first measuring component (5) facing the complex parts, and the longitudinal bracket (3) is provided with a second measuring component (6) facing the complex parts; At least one of the measuring component 1 (5) and the measuring component 2 (6) is provided with a polarizing component (7), and the polarizing component (7) is used to eliminate reflections of complex parts during the three-dimensional measurement process.

2. The multi-eye vision 3D measuring device for complex parts according to claim 1, characterized in that: The measuring component 2 (6) includes a fixed box (61), a detection window (62) is provided on one side of the fixed box (61) corresponding to the measuring platform (2), a measuring camera (63) and a reflector 1 (64) and a reflector 2 (65) capable of adjusting the rotation angle are installed in the fixed box (61), the detection light path of the measuring camera (63) passes through the reflector 1 (64) and the reflector 2 (65) and is reflected to the complex parts on the measuring platform (2), and the rotation axes of the reflector 1 (64) and the reflector 2 (65) are perpendicular to each other.

3. The multi-eye vision 3D measuring device for complex parts according to claim 2, characterized in that: A first servo motor (67) is installed in the fixed box (61), and the output shaft of the first servo motor (67) is connected to the reflector 1 (64) and drives the reflector 1 to rotate. The rotation shaft of the first servo motor (67) is in a vertical state and is used to perform up and down detection of complex parts by rotating and adjusting the measuring camera (63); A second servo motor (69) is installed in the fixed box (61), and the output shaft of the second servo motor (69) is connected to the second reflector (65) and drives it to rotate. The output shaft of the second servo motor (69) is perpendicular to the output shaft of the first servo motor (67) and is used to rotate and adjust the measuring camera (63) to detect different positions of the complex parts in the horizontal direction.

4. The multi-eye vision 3D measurement device for complex parts according to claim 3, characterized in that: An angle sensor 1 (68) is installed at the connection between the output shaft of the first servo motor (67) and the reflector 1 (64) for monitoring the rotation angle of the reflector 1 (64); An angle sensor 2 (610) is installed at the connection between the output shaft of the second servo motor (69) and the second reflector (65) for monitoring the rotation angle of the second reflector (65).

5. The multi-eye vision 3D measuring device for complex parts according to claim 3, characterized in that: A distance measuring component (66) is integrated on the measuring camera (63), and the distance measuring component (66) is used to calculate the distance between the surface of the complex component and the measuring camera (63).

6. The multi-eye vision 3D measurement device for complex parts according to claim 1, characterized in that: The measuring platform (2) comprises a base (21) and a support platform (22), wherein the support platform (22) is movably mounted on the base (21), the support platform (22) is rotatably connected to an annular support member (23) outside the support platform (22), the annular support member (23) is rotatably connected to the base (21), and the rotation direction of the support platform (22) relative to the annular support member (23) is perpendicular to the rotation direction of the annular support member (23) relative to the base (21).

7. The multi-eye vision 3D measuring device for complex parts according to claim 6, characterized in that: The support platform (22) is rotatably connected to the base (21) via a first rotating shaft (24), and the support platform (22) is rotatably connected to the annular support member (23) via a second rotating shaft (25), and the first rotating shaft (24) and the second rotating shaft (25) are perpendicular to each other; A support plate (26) is fixed to the bottom of the annular support member (23), and an adjusting rod (27) is rotatably connected to the support plate (26). The adjusting rod (27) is rotatably connected to the bottom of the support platform (22). The adjusting rod (27) drives the support platform (22) to rotate relative to the annular support member (23) by telescoping, and controls its rotation angle. The bottom of the base (21) is rotatably connected to a second adjusting rod (28), and the second adjusting rod (28) is rotatably connected to the support plate (26) or the annular support member (23). The second adjusting rod (28) drives the annular support member (23) and the support platform (22) to rotate relative to the base (21) as a whole through telescoping, and controls the rotation angle thereof; A first level sensor (29) is installed on the support platform (22), and a second level sensor (210) is installed on the annular support member (23).

8. The multi-eye vision 3D measuring device for complex parts according to claim 7, characterized in that: A magnetic attraction mechanism (211) is installed on the support platform (22), and the magnetic attraction mechanism (211) is used to fix complex parts made of metal materials through the magnetic attraction principle.

9. The multi-eye vision 3D measurement device for complex parts according to claim 7, characterized in that: A fixing plate (212) is symmetrically mounted on the edge of the support platform (22), and a limiting screw (213) for clamping complex parts is provided on the fixing plate (212).

10. The multi-eye vision 3D measuring device for complex parts according to claim 1, characterized in that: The polarizing assembly (7) includes a connecting rod (71) and a third servo motor (72). The connecting rod (71) fixes the third servo motor (72) on the transverse bracket (4) and is connected to the polarizing plate (73) through the output shaft of the third servo motor (72). The third servo motor (72) is used to drive the polarizing plate (73) to rotate and control the rotation angle of the polarizing plate (73) to control the coverage of the polarizing plate (73) on the probe of the measuring assembly 2 (6). An angle sensor 3 (74) is provided at the connection between the output shaft of the third servo motor (72) and the polarizing plate (73). The angle sensor 3 (74) is used to monitor the rotation angle of the polarizing plate (73).

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