CN218566429U - Rudder class structure position error detection device - Google Patents
Rudder class structure position error detection device Download PDFInfo
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- CN218566429U CN218566429U CN202223172730.9U CN202223172730U CN218566429U CN 218566429 U CN218566429 U CN 218566429U CN 202223172730 U CN202223172730 U CN 202223172730U CN 218566429 U CN218566429 U CN 218566429U
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Abstract
The utility model relates to a rudder type structural member form and position error detection device, which comprises a detection platform, an industrial camera, a workpiece fixing mechanism and a camera positioning mechanism; a light shield is arranged above the detection platform, a light source is arranged above the interior of the light shield, and a display screen for displaying a detection result is arranged outside the light shield; the rudder type structural member is arranged on the detection platform through the workpiece fixing mechanism, the two industrial cameras are respectively arranged on the detection platform through respective camera positioning mechanisms, the positions of the industrial cameras in the vertical direction can be adjusted, and a lens of one industrial camera faces the end face of a rudder shaft of the rudder type structural member and is used for acquiring images of the area of the rudder shaft of the rudder type structural member; the lens of the other industrial camera faces to one control surface of the rudder structure and is used for acquiring an image of the control surface area of the rudder structure. The device can realize the nondestructive and contactless detection of rudder class structure, has reduced the positioning error that many times clamping produced, and is lower to the detection ring border requirement, can be applicable to the detection on the production line.
Description
Technical Field
The utility model relates to a work piece geometric errors equipment technical field specifically is a rudder class structure geometric errors detection device.
Background
The rudder type structural member arranged on the surface of the rocket changes the direction of airflow by adjusting the angle of the rudder type structural member, so that the lateral control force for changing the flying attitude of the rocket is generated, and the rudder type structural member is an important structural member for controlling the flying attitude of the rocket. The rudder type structural component receives the influence of many factors in the manufacturing type in-process for there is the deviation between actual shape and the ideal shape, this kind of deviation is called the form and position error, and the form and position error of rudder type structural component can produce very big influence to rocket flight attitude's stationarity and control accuracy, has increased the risk that damages appears in the rudder type structural component service process simultaneously, causes very big hidden danger to rocket flight safety, therefore the form and position error detection of rudder type structural component has important meaning to guaranteeing rocket flight safety.
At present, the form and position errors of rudder type structural members are mainly measured by a three-coordinate measuring machine and a manual measuring mode. The detection speed of the three-coordinate measuring machine is low, and the single detection time is 2-3 hours; due to the complex surface of the rudder type structural part, multiple clamping is needed in the detection process, and positioning errors are easy to generate; in addition, because the probe sensitivity is high, other interference or vibration in the detection environment can influence the detection result, so that the three-coordinate measuring machine has strict requirements on the detection environment and cannot be used in a processing production workshop. The manual work is mainly measured through a microscope or a caliper, the labor intensity is high, the working efficiency is low, and the interference caused by human factors is obvious. Therefore, the application designs a rudder class structure form and position error detection device, realizes through machine vision harmless, contactless detection.
SUMMERY OF THE UTILITY MODEL
The not enough to prior art, the utility model discloses the technical problem who plans to solve provides a rudder class structure geometric errors detection device.
The utility model provides a technical scheme that technical problem adopted as follows:
a rudder type structural member form and position error detection device comprises a detection platform, an industrial camera, a workpiece fixing mechanism and a camera positioning mechanism; a light shield is arranged above the detection platform, a sliding door is arranged on one side of the light shield, a light source is arranged above the interior of the light shield, and a display screen for displaying a detection result is arranged outside the light shield; the rudder type structural member is arranged on the detection platform through the workpiece fixing mechanism, the two industrial cameras are respectively arranged on the detection platform through respective camera positioning mechanisms, the positions of the industrial cameras in the vertical direction can be adjusted, and a lens of one industrial camera faces the end face of a rudder shaft of the rudder type structural member and is used for acquiring images of the area of the rudder shaft of the rudder type structural member; the lens of the other industrial camera faces to one control surface of the rudder structure and is used for acquiring an image of the control surface area of the rudder structure.
Further, the workpiece fixing mechanism comprises a positioning clamp, a fastening clamp and a right-angle frame; the left side and the right side of the rudder type structural member are respectively clamped through positioning fixtures, and the positioning fixtures are connected with the detection platform through right-angle frames; one side of the fastening clamp is provided with a U-shaped groove, one end of the rudder type structural member, which is opposite to the rudder shaft, is clamped by the fastening clamp and is positioned in the U-shaped groove of the fastening clamp, and the fastening clamp is connected with the detection platform through a right-angle frame; rubber gaskets are arranged at the contact positions of the positioning clamp and the fastening clamp and the rudder structural member.
Further, the camera positioning mechanism comprises a chain wheel shaft, a chain, a camera fixing plate, an upright post, a chain wheel and a stepping motor; the two upright posts are vertically arranged on the detection platform, two ends of a chain wheel shaft are respectively and rotatably connected with the upper parts of the two upright posts, two ends of the chain wheel shaft are respectively provided with a chain wheel, the lower parts of the two upright posts are respectively and rotatably provided with a chain wheel, and two chain wheels close to the same upright post are sleeved with a chain; two ends of the camera fixing plate are connected with the two chains, and the industrial camera is installed on the camera fixing plate; step motor installs on testing platform, and step motor's output shaft is connected with the sprocket of one of them stand lower part.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses a device can realize the harmless and contactless detection of rudder class structure, has reduced the positioning error that many times the clamping produced. Compared with a three-coordinate measuring machine, the device has low requirement on the detection environment and can be suitable for the environment of a production line, and the detection device is configured on the production line, so that the integration of automatic positioning and detection of workpieces in batches of the same specification and the automation of workpiece sampling inspection can be realized.
2. Aiming at the special structure of the rudder type structural member, a special positioning clamp and a special fastening clamp are designed, the detection of the rudder type structural member with different sizes and specifications can be realized on the basis of a detection platform, and certain universality and adaptability are realized. Meanwhile, the device can realize automatic clamping, positioning and self-adaptive detection of rudder type structural members of different specifications and models through the upper computer controlling the positioning mechanism and the transmission mechanism, and automatically adjust the position of the camera and the acquisition mode of the camera according to the size of a workpiece and the object distance.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a view showing the structure of the present invention after removing the light-shielding cover and the storage cabinet;
FIG. 3 is a rear view of FIG. 2;
in the figure: 1. a rotating shaft; 2. a chain; 3. an industrial camera; 4. a camera fixing plate; 5. a camera support; 6. a sprocket; 7. a stepping motor; 8. a rudder type structural member; 9. a storage cabinet; 10. a structural member metal core; 11. fixing a clamp; 12. a fixing member; 13. a hole platform; 14. a light shield; 15-a display screen; 8-1, a rudder shaft; 8-2 and a rocker arm.
Detailed Description
Specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the technical solutions of the present invention in detail, and do not limit the protection scope of the present application.
As shown in fig. 2, the rudder-like structure 8 has a trapezoidal-like plate-like structure, and has a height of about 60cm, a width of about 30cm and a thickness of about 8cm; a rudder shaft 8-1 is arranged on the front end surface of the rudder type structural part 8, a rocker arm 8-2 is sleeved on the rudder shaft 8-1, and the rudder shaft 8-1 is reinforced through the rocker arm 8-2; the rudder structure 8 has larger left and right sides and is called as a rudder surface.
The utility model provides a rudder type structural member form and position error detection device (a device for short, see fig. 1-3), which comprises a detection platform 13, an industrial camera 3, a workpiece fixing mechanism, a camera positioning mechanism and an upper computer; the rudder type structural part 8 is installed on the detection platform 13 through the workpiece fixing mechanism, the two industrial cameras 3 are respectively installed on the detection platform 13 through respective camera positioning mechanisms, the camera positioning mechanisms can adjust the positions of the industrial cameras 3 in the vertical direction, the lens of one industrial camera 3 faces the end face of the rudder shaft of the rudder type structural part and is used for acquiring the image of the area of the rudder shaft of the rudder type structural part, and the symmetry detection is realized through the information in the image of the area of the rudder shaft; the lens of the other industrial camera 3 faces to a control surface of the rudder type structural member, namely the large side surface of the rudder type structural member, and is used for acquiring an image of a control surface area of the rudder type structural member and realizing perpendicularity detection by utilizing the image of the control surface area; both industrial cameras 3 are connected with an upper computer.
Referring to fig. 2, the detection platform 13 is provided with array-type threaded holes, so that the installation of other components is facilitated; a light shield 14 is arranged above the detection platform 13, the industrial camera 3, the rudder type structural member 8, the workpiece fixing mechanism and the camera positioning mechanism are all positioned in the light shield 14, and a sliding door is arranged on one side of the light shield 14, so that the rudder type structural member 8 can be conveniently assembled and disassembled; a light source (not shown in the figure) is arranged above the inner part of the light shield 14, and the inner wall of the light shield 14 is made of white light-proof materials, so that a good light-shielding effect is ensured; a display screen 15 is arranged on the outer side of the light shield 14, the display screen 15 is connected with an upper computer and used for displaying a detection result, and a storage cabinet 9 is arranged below the detection platform 13 and used as an electrical cabinet;
the workpiece fixing mechanism comprises a positioning clamp 10, a fastening clamp 11 and a right-angle frame 12; the rudder type structural member 8 is placed on a detection platform 13, the left side and the right side of the rudder type structural member are respectively clamped by positioning fixtures 10, and the positioning fixtures 10 are fixedly connected with the detection platform 13 through right-angle frames 12; one side of the fastening clamp 11 is provided with a U-shaped groove, the rear end of the rudder type structural member 8, namely one end opposite to the rudder shaft, is clamped by the fastening clamp 11, the rear end of the rudder type structural member 8 is positioned in the U-shaped groove of the fastening clamp 11, and the fastening clamp 11 is fixedly connected with the detection platform 13 through a right-angle stand 12; the rubber gaskets are arranged at the positions where the positioning clamp 10 and the fastening clamp 11 are in contact with the rudder structure member 8, so that the rudder structure member 8 is prevented from being damaged by clamping.
The camera positioning mechanism comprises a chain wheel shaft 1, a chain 2, a camera fixing plate 4, an upright post 5, a chain wheel 6 and a stepping motor 7; the two upright posts 5 are vertically arranged on the detection platform 13, two ends of the chain wheel shaft 1 are respectively rotatably connected with the upper parts of the two upright posts 5, the two ends of the chain wheel shaft 1 are respectively fixed with a chain wheel 6, the lower parts of the two upright posts 5 are respectively rotatably provided with a chain wheel 6, and the two chain wheels 6 close to the same upright post 5 are sleeved with chains 6; two ends of the camera fixing plate 4 are connected with the same positions of the two chains 6, so that the camera fixing plate 4 is ensured to be horizontal, and the industrial camera 3 is arranged on the camera fixing plate 4; step motor 7 is installed on testing platform 13, step motor 7's output shaft and the sprocket 6 fixed connection of one of them stand 5 lower part, step motor 7 and host computer connection, drive its sprocket 6 rotation on the output shaft through step motor 7, make two chains 6 synchronous rotations, realize the motion of camera fixed plate 4 in vertical direction, and then adjustment industrial camera 3 is in the ascending position of vertical direction, guarantee that industrial camera 3 can the complete collection waits to detect the image of face.
The feasible models of the components are given below, and other models can be selected according to specific working conditions; the model of the stepping motor 7 is 57BYG250C, the stepping angle is 1.8 degrees, the torque is 1.8 N.m, and the output shaft of the motor is in interference fit with the chain wheel 6 to form tight connection; the model TB6600, the rated current 4.2A and the subdivision number 6400 are selected as a motor driver of the stepping motor 7; the PLC model for controlling the stepping motor 7 is Siemens S7-200SMART, the CPU is ST40, 24I/O can be input, and 16I/O can be output; the output I/O of the PLC is connected with the input end of the motor driver, and the output end of the motor driver is connected with the input end of the stepping motor 7. The sizes of the rudder shaft area and the rudder surface area are different, so that the models of the two industrial cameras 3 are different, the industrial camera for collecting the images of the rudder shaft area can adopt a CCD camera with the model of MV-HS4300GM, the pixel size is 2.8 mu m multiplied by 2.8 mu m, the optical size is APS-C, the maximum frame rate is 2.5fps, the exposure time is 285 mu s-2 s, and the output image is a gray image; the model of the lens is BT-45F3528MP10, the focal length is 35mm, and the minimum object distance is 34cm; the industrial camera for collecting the image of the control surface area can adopt a CCD camera with the model number of MV-HS500GM, the pixel size is 2.2 mu m multiplied by 2.2 mu m, the optical size is 1/2.5, the maximum frame rate is 14fps, the exposure time is 35 mus-2.26 s, and the output image is a gray image; the model of the lens is BT-118C0820MP5, the focal length is 8mm, and the minimum object distance is 100mm.
The utility model discloses a theory of operation and work flow do:
the rudder type structural part 8 is arranged on a detection platform 13 through a positioning clamp 10 and a fastening clamp 11, an upper computer controls a stepping motor 7 of two camera positioning mechanisms, the stepping motor 7 adjusts the positions of two industrial cameras 3 in the vertical direction through chain wheel and chain transmission, and the end surface and the control surface of a control shaft of the rudder type structural part 8 are respectively positioned in the center of the visual field of the corresponding industrial camera 3; then, two industrial cameras 3 are used for respectively acquiring a rudder shaft area image and a rudder surface area image of a rudder type structural member and uploading the images to an upper computer, the upper computer processes the images, and shape and position errors of symmetry and verticality of the rudder type structural member are detected according to the processed images, wherein a symmetry detection method is disclosed in documents (application of von Willebrand-Yukui Hough transform in part shape and position error detection [ J ]. Mechanical science and technology, 2011, 30 (6): 957-967.), and a verticality detection method is disclosed in documents (computer vision detection algorithm research of Murray, yan. Verticality [ J ]. Modern manufacturing engineering, 2007 (3): 101-103 ]).
The form and position error detection result is displayed on the display screen 15, and if the symmetry degree and verticality detection result is smaller than or within the respective allowable error range, the product qualification is displayed on the display screen 15; if the detection result exceeds the allowable error range, the display screen 15 displays that the product is unqualified, and if the symmetry detection result exceeds the allowable error range, the display screen can also display that the symmetry error is out of tolerance and the verticality is the same.
The utility model discloses the use of part not mentioned is in prior art.
Claims (3)
1. A rudder type structural member form and position error detection device comprises a detection platform, an industrial camera, a workpiece fixing mechanism and a camera positioning mechanism; the device is characterized in that a light shield is arranged above the detection platform, a sliding door is arranged on one side of the light shield, a light source is arranged above the interior of the light shield, and a display screen for displaying a detection result is arranged on the outer side of the light shield; the rudder type structural member is arranged on the detection platform through the workpiece fixing mechanism, the two industrial cameras are respectively arranged on the detection platform through respective camera positioning mechanisms, the positions of the industrial cameras in the vertical direction are adjustable, and a lens of one industrial camera faces to the rudder shaft end face of the rudder type structural member and is used for acquiring a rudder shaft area image of the rudder type structural member; the lens of the other industrial camera faces to one control surface of the rudder structure and is used for acquiring an image of the control surface area of the rudder structure.
2. The rudder type structural member form and position error detection device according to claim 1, wherein the workpiece fixing mechanism includes a positioning clamp, a fastening clamp and a right-angle stand; the left side and the right side of the rudder type structural member are respectively clamped through positioning fixtures, and the positioning fixtures are connected with the detection platform through right-angle frames; one side of the fastening clamp is provided with a U-shaped groove, one end of the rudder structural member, which is opposite to the rudder shaft, is clamped by the fastening clamp and is positioned in the U-shaped groove of the fastening clamp, and the fastening clamp is connected with the detection platform through a right-angle frame; rubber gaskets are arranged at the contact positions of the positioning clamp and the fastening clamp and the rudder structural member.
3. The rudder type structure part form and position error detection device according to claim 1 or 2, wherein the camera positioning mechanism comprises a chain wheel shaft, a chain, a camera fixing plate, a stand column, a chain wheel and a stepping motor; the two upright posts are vertically arranged on the detection platform, two ends of a chain wheel shaft are respectively and rotatably connected with the upper parts of the two upright posts, two ends of the chain wheel shaft are respectively provided with a chain wheel, the lower parts of the two upright posts are respectively and rotatably provided with a chain wheel, and two chain wheels close to the same upright post are sleeved with a chain; two ends of the camera fixing plate are connected with the two chains, and the industrial camera is arranged on the camera fixing plate; step motor installs on testing platform, and step motor's output shaft is connected with the sprocket of one of them stand lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223172730.9U CN218566429U (en) | 2022-11-29 | 2022-11-29 | Rudder class structure position error detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223172730.9U CN218566429U (en) | 2022-11-29 | 2022-11-29 | Rudder class structure position error detection device |
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| Publication Number | Publication Date |
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| CN218566429U true CN218566429U (en) | 2023-03-03 |
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| CN202223172730.9U Active CN218566429U (en) | 2022-11-29 | 2022-11-29 | Rudder class structure position error detection device |
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