CN216246154U - Hub flatness online measuring device based on structured light camera - Google Patents
Hub flatness online measuring device based on structured light camera Download PDFInfo
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- CN216246154U CN216246154U CN202122693760.3U CN202122693760U CN216246154U CN 216246154 U CN216246154 U CN 216246154U CN 202122693760 U CN202122693760 U CN 202122693760U CN 216246154 U CN216246154 U CN 216246154U
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Abstract
The utility model belongs to the technical field of measuring equipment, and discloses a hub flatness online measuring device based on a structured light camera, which comprises a data acquisition module, wherein a translation module and an industrial computer module connected with the data acquisition module through a data line are arranged on the data acquisition module; according to the utility model, the 3D structured light camera with a small visual field is adopted to collect the workpiece on the detection table for multiple times, then the data is sent to the industrial computer module, and the industrial computer module splices and automatically splices the data to obtain the complete workpiece end face and calculate the flatness of the complete workpiece end face, so that a measurement mode of manual participation is replaced, the processing efficiency and the precision of a processing result are improved, and the rapid and accurate non-contact measurement of the flatness of the hub end face is realized.
Description
Technical Field
The utility model belongs to the technical field of measuring equipment, and particularly relates to a hub flatness online measuring device based on a structured light camera.
Background
With the development of industrial intelligence, how to improve the quality of products and ensure the yield of the products becomes a problem of great concern, the traditional measurement mode, such as three-coordinate measurement, is complex to operate, has high requirements on equipment deployment environment, and is difficult to realize quick and real-time measurement.
The intelligent upgrading of automobile manufacturing is as good as possible, and the wheel hub is as important spare part, and it is crucial to guarantee wheel hub quality. At present, the following scheme is mainly adopted for measuring the flatness of the end face of a hub: (1) the hub is fixed manually, and an operating mechanism is used for measurement, so that the efficiency is low, the operation is complicated, and the real-time requirement is difficult to meet; (2) the line laser camera is used for scanning the hub to calculate the flatness, the line laser camera needs to be driven by the mechanism to scan a circle around the hub, and the consumed time is long. Therefore, how to realize the rapid high-precision measurement of the flatness of the hub needs to be researched, and the requirement of real-time measurement is met, so that the working efficiency is improved, and the labor cost is saved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hub flatness online measuring device based on a structured light camera, which adopts a small-vision 3D structured light camera to collect workpieces on a detection table for multiple times, then sends data to an industrial computer module, and the industrial computer module splices and automatically splices the data to obtain the complete workpiece end face and calculates the flatness of the complete workpiece end face, thereby replacing a measuring mode of manual participation, improving the processing efficiency and the precision of the processing result, and realizing the rapid and accurate non-contact measurement of the flatness of the hub end face.
Based on the purpose, the utility model adopts the following technical scheme: the utility model provides a wheel hub plane degree on-line measuring device based on structured light camera, includes the data acquisition module, is equipped with translation module and the industrial computer module that is connected with the data acquisition module through the data line on the data acquisition module, translation module terminal surface downwardly extending has a pair of support column, is equipped with between the support column and examines the test table, places calibration module on examining the test table, and the translation module passes through the connecting piece and is connected with the data acquisition module.
Preferably, the translation module comprises a base, a group of mutually parallel slide rails extends downwards from the end face of the base, slide grooves are formed in the slide rails, an electric push rod parallel to the slide rails is further arranged on the end face of the base, an X-axis moving beam is arranged on the electric push rod, the axial direction of the X-axis moving beam is perpendicular to the axial direction of the electric push rod, and the X-axis moving beam extends towards the slide rails on the two sides of the base and is matched with the slide rails.
Preferably, be equipped with Y axle moving platform on the X axle moving beam, Y axle moving platform is the same and the fastening connection with X axle moving beam's axial, is equipped with in the Y axle moving platform and is cylindric electromagnetic push rod, and electromagnetic push rod lateral surface is equipped with the strong magnet of permanent magnetism, and the strong magnet of permanent magnetism is the semi-cylinder and wraps up electromagnetic push rod, and the strong magnet of permanent magnetism upwards extends there is the curb plate and passes Y axle moving platform, is equipped with Y axle movable sliding block between the curb plate.
Preferably, the connecting piece includes the camera fixed block with Y axle removal slider rigid coupling, and camera fixed block up end is equipped with the fixed orifices, is equipped with the camera fixed plate on the camera fixed block, and the camera fixed plate passes through fixed orifices and camera fixed plate fixed connection.
Preferably, the data acquisition module adopts a 3D structure light camera, and the camera fixing plate is connected with the 3D structure light camera through a bolt and a fixing hole.
Preferably, the industrial computer module comprises a data preprocessing module, a data splicing module and a flatness calculating module.
Compared with the prior art, the utility model has the following beneficial effects: the utility model utilizes a 3D structure light camera to realize the rapid non-contact measurement of the flatness of the wheel hub, and realizes the measurement function through a measurement system consisting of a data acquisition module, a calibration module and an industrial computer module; the data acquisition module comprises a 3D structured light camera and a translation module with two degrees of freedom on a plane, and high-precision multipoint data acquisition is realized; the calibration module comprises a standard ball, and the relative relation between the module and the camera is resolved through the calibration module; the industrial computer module comprises a data preprocessing module, a data splicing module and a flatness calculating module, realizes the quick reconstruction of the end face of the hub, obtains high-precision point cloud of the end face of the hub, calculates the flatness in a block counting manner, then sends the data to the upper computer, and visualizes the processing result on the upper computer; the system has the advantages of high efficiency, high precision and the like, can realize real-time measurement, and greatly improves the product quality; meanwhile, the manual participation is reduced, and the manpower, material resources and time are saved; the data acquisition module of the utility model utilizes the movable translation module to carry the high-precision camera, thereby greatly improving the quality of point cloud data and ensuring the precision of subsequent processing.
Drawings
FIG. 1 is a schematic view of a hub flatness online measuring device based on a structured light camera according to the present invention;
FIG. 2 is a schematic view of the translational module and data acquisition module of the present invention;
FIG. 3 is a schematic view of the translational module of the present invention;
FIG. 4 is an enlarged partial schematic view of the slide rail of the present invention;
FIG. 5 is a schematic view of a Y-axis motion stage in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of a data acquisition module in accordance with an embodiment of the present invention.
In the figure: the device comprises a support column 1, a translation module 2, a base 21, a slide rail 22, an electric push rod 23, an X-axis moving beam 24, a Y-axis moving platform 25, a Y-axis moving slide block 26, an electromagnetic braking module 27, an electromagnetic push rod 28, a permanent magnet strong magnet 29, a data acquisition module 3, a 3D structured light camera 31, a camera fixing block 32, a camera fixing plate 33, a calibration module 4, a detection table 5 and an industrial computer 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example one
As shown in fig. 1-6, the wheel hub flatness online measuring device based on the structured light camera comprises a data acquisition module 3, wherein a translation module 2 and an industrial computer module 6 connected with the data acquisition module 3 through a data line are arranged on the data acquisition module 3, a pair of support columns 1 extends downwards from one end surface of the translation module 2, a detection table 5 is arranged between the support columns 1, a calibration module 4 is placed on the detection table 5, and the translation module 2 is connected with the data acquisition module 3 through a connecting piece.
The translation module 2 comprises a base 21, a group of mutually parallel slide rails 22 extend downwards from the end face of the base 21, slide grooves are formed in the slide rails 22, an electric push rod 23 parallel to the slide rails 22 is further arranged on the end face of the base 21, an X-axis movable beam 24 is arranged on the electric push rod 23, the axial direction of the X-axis movable beam 24 is axially vertical to the axial direction of the electric push rod 23, and the X-axis movable beam 24 extends towards the slide rails 22 on the two sides of the base 21 and is matched with the slide rails 22.
Be equipped with Y axle moving platform 25 on the X axle moving beam 24, Y axle moving platform 25 is the same and fastening connection with X axle moving beam 24's axial, is equipped with in the Y axle moving platform 25 and is cylindric electromagnetic push rod 28, and electromagnetic push rod 28 lateral surface is equipped with permanent magnetism strong magnet 29, and permanent magnetism strong magnet 29 is the semi-cylinder and wraps up electromagnetic push rod 28, and permanent magnetism strong magnet 28 upwards extends there is the curb plate and passes Y axle moving platform 25, is equipped with Y axle moving slide 26 between the curb plate.
The connecting piece includes camera fixed block 32 with Y axle movable slide block 26 rigid coupling, and camera fixed block 32 up end is equipped with the fixed orifices, is equipped with camera fixed plate 33 on the camera fixed block 32, and camera fixed plate 33 passes through fixed orifices and camera fixed plate 33 fixed connection.
The data acquisition module 3 adopts a 3D structured light camera 31, and a camera fixing plate 33 is connected with the 3D structured light camera 31 through bolts and fixing holes.
The industrial computer module 6 comprises a data preprocessing module, a data splicing module and a flatness calculating module.
In this embodiment, the translational module 2 moves along the X, Y axis in a plane, so that the 3D structured light camera 31 can shoot the end face of the hub at multiple points, so that the data of the end face of the hub collected twice adjacently has a repeat area, the calibration module 4 uses a standard ball, fixes the standard ball, the data collection module 3 moves and shoots the standard ball for multiple times by controlling the translational module 2, records the coordinates of the translational module and the coordinates of the center of the corresponding standard ball during shooting, and calculates the relative relationship between the coordinates and the center of the standard ball, the industrial computer module 6 includes a data preprocessing module, a data splicing module and a flatness calculation module, the data preprocessing module performs noise removal and noise reduction sampling on the collected original data, the data splicing module performs automatic and fast splicing on the data collected at multiple points to obtain complete end face data of the hub, the flatness calculation module adopts a point-taking and block calculation method, the flatness of the end face of the hub is accurately calculated, the flatness calculation module is connected with an upper computer through a network, visual processing is carried out at the upper computer, the upper computer stores the processing result into a local or cloud database,
the working steps during working are as follows:
step 1: the method comprises the steps of selecting a 3D structured light camera 31 with small visual field and high precision to ensure the quality of point cloud data and the high precision requirement of calculating the flatness, carrying the 3D structured light camera 31 on a translation module which can move on a plane in two degrees of freedom through a connecting piece, moving the 3D structured light camera 31 to multiple point positions to collect data, ensuring that the complete type of the point cloud data of the end face of the hub is obtained, and fixing the translation module 2 on a detection station through a support column 1.
Step 2: the relation of a coordinate system of a 3D structured light camera 31 and a translation module 2 is calibrated by using a calibration module 4 for initial splicing of subsequent data, a standard ball of the calibration module 4 is fixed on a detection table 5, the movement of a data acquisition module 3 in XY directions is realized by an electric push rod 23 and a Y-axis moving platform 25 on the translation module 2, when the movement in the X-axis direction is required, the electric push rod 23 works, the electric push rod 23 pushes an X-axis moving beam 24 to move in the X-axis direction, meanwhile, the X-axis moving beam 24 moves along a slide rail 22, when the movement in the Y-axis direction is required, the electric push rod 28 and an electromagnetic brake module 27 are electrified, the electric brake module 27 generates a magnetic field and moves towards two sides of a Y-axis moving slide block 26 under the action of the magnetic field, the constraint on a permanent magnet 29 is released, then the magnetic field generated by the electromagnetic push rod 28 interacts with the magnetic field of the permanent magnet 29 to move in the Y-axis direction, when the power is off, the electromagnetic braking module 27 restrains the permanent magnet 29 under the action of the spring, brakes the Y-axis moving platform 25 connected with the permanent magnet 29, shoots a standard ball, records the coordinates of the translational module 2 during shooting, calculates the coordinates of the center of the sphere corresponding to the data of the standard ball, calculates the relative relationship between the two coordinates, and stores the relative relationship on the industrial computer module 6.
And step 3: the data acquisition module 3 is used for acquiring the point cloud data of the wheel hub cross section of a plurality of shooting points and transmitting the point cloud data to the industrial computer module 6 through network connection.
And 4, step 4: the data preprocessing module of the industrial computer module 6 removes noise and invalid regions from the data to reduce the shadow of the noise, and meanwhile, performs noise reduction sampling on the original data to improve the processing speed and reduce the time for subsequent calculation.
And 5: and a data splicing module of the industrial computer module 6 is used for automatically splicing the images by searching and transforming corresponding points according to the result calibrated in the step 2 aiming at the preprocessed point cloud data.
Step 6: the flatness calculation module of the industrial computer module 6 uniformly takes points on the complete hub end surface point cloud after splicing, calculates the flatness of the area near the points, counts the mean value and the standard deviation, performs visual processing on the upper computer by the processing result of the calculation module through network connection, and can save the processing result in a local or cloud database.
Example two
An on-line measuring device for hub flatness based on a structured light camera is shown in fig. 1-6, and compared with embodiment 1, the working steps of this embodiment are as follows:
step 1: the method comprises the steps of selecting a 3D structured light camera 31 with small visual field accuracy of 0.03mm to guarantee the quality of point cloud data, further guaranteeing the high-accuracy requirement of calculating the flatness, carrying the 3D structured light camera 31 on a translation module capable of moving two degrees of freedom on a plane through a connecting piece, enabling the 3D structured light camera 31 to move to multiple point positions to collect data, guaranteeing the integrity of the point cloud data of the end face of a hub, and fixing the translation module 2 on a detection station through a support column 1.
Step 2: the relation of a coordinate system of the 3D structured light camera 31 and the translation module 2 is calibrated by using the calibration module 4 for initial splicing of subsequent data, in the embodiment, a standard ball with the diameter of 20mm is selected, the standard ball of the calibration module 4 is fixed on the detection table 5, the movement of the data acquisition module 3 in the XY direction is realized through an electric push rod 23 on the translation module 2 and a Y-axis moving platform 25, the standard ball is shot, the coordinate of the translation module 2 during shooting is recorded, the coordinate of the center of sphere corresponding to the data of the standard ball is calculated, the relative relation between the two is calculated, and the relative relation is stored on the industrial computer module 6.
And step 3: the data acquisition module 3 is used for acquiring the point cloud data of the wheel hub cross section of a plurality of shooting points, and the point cloud data is transmitted to the industrial computer module 6 through network connection, wherein the data acquisition of 6 shooting points is adopted in the embodiment, and the point cloud data has 30% overlapping degree.
And 4, step 4: the data preprocessing module of the industrial computer removes noise and invalid regions from the data, and reduces the influence of the noise. Meanwhile, the original data is down-sampled, so that the processing speed is improved, and the time for subsequent calculation is reduced.
And 5: the data splicing module of the industrial computer module 6 utilizes the result calibrated in the step 2 to automatically splice images by searching and transforming corresponding points aiming at the preprocessed point cloud data, and in the embodiment, the time for splicing the point cloud of the end face of the wheel hub is 16 s.
Step 6: the flatness calculation module of the industrial computer module 6 uniformly takes points on the complete hub end face point cloud after splicing, calculates the flatness of the area near the points, counts the mean value and the standard deviation, has the precision smaller than 0.05mm, performs visual processing on the upper computer by connecting the processing result of the calculation module through a network, and can save the processing result in a local or cloud database.
It should be noted that, for those skilled in the art, many changes and modifications can be made without departing from the spirit and scope of the utility model, and the utility model is not to be considered limited to the embodiments illustrated in the drawings.
Claims (6)
1. The utility model provides a wheel hub plane degree on-line measuring device based on structured light camera, includes data acquisition module, is equipped with the translation module on data acquisition module and passes through the industrial computer module that data line and data acquisition module are connected, its characterized in that: a pair of support columns extends downwards from one end face of the translation module, a detection table is arranged between the support columns, a calibration module is placed on the detection table, and the translation module is connected with the data acquisition module through a connecting piece.
2. The hub flatness online measurement device based on the structured light camera as claimed in claim 1, wherein: the translation module comprises a base, a group of mutually parallel slide rails extend downwards from the end face of the base, slide grooves are formed in the slide rails, an electric push rod parallel to the slide rails is further arranged on the end face of the base, an X-axis moving beam is arranged on the electric push rod, the axial direction of the X-axis moving beam is perpendicular to the axial direction of the electric push rod, and the X-axis moving beam extends towards the slide rails on the two sides of the base and is matched with the slide rails.
3. The hub flatness online measurement device based on the structured light camera as claimed in claim 2, wherein: the X-axis moving beam is provided with a Y-axis moving platform, the Y-axis moving platform is axially same with the X-axis moving beam and is fixedly connected with the X-axis moving beam, a cylindrical electromagnetic push rod is arranged in the Y-axis moving platform, a permanent magnet strong magnet is arranged on the outer side face of the electromagnetic push rod, the permanent magnet strong magnet is semi-cylindrical and wraps the electromagnetic push rod, a side plate extends upwards and penetrates through the Y-axis moving platform, and a Y-axis moving sliding block is arranged between the side plates.
4. The hub flatness online measurement device based on the structured light camera as claimed in claim 3, wherein: the connecting piece includes the camera fixed block with Y axle removal slider rigid coupling, and camera fixed block up end is equipped with the fixed orifices, is equipped with the camera fixed plate on the camera fixed block, and the camera fixed plate passes through fixed orifices and camera fixed plate fixed connection.
5. The hub flatness online measurement device based on the structured light camera as claimed in claim 4, wherein: the data acquisition module adopts a 3D structure light camera, and a camera fixing plate is connected with the 3D structure light camera through a bolt and a fixing hole.
6. The hub flatness online measurement device based on the structured light camera as claimed in claim 5, wherein: the industrial computer module comprises a data preprocessing module, a data splicing module and a flatness calculating module.
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| CN202122693760.3U CN216246154U (en) | 2021-11-05 | 2021-11-05 | Hub flatness online measuring device based on structured light camera |
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| CN202122693760.3U CN216246154U (en) | 2021-11-05 | 2021-11-05 | Hub flatness online measuring device based on structured light camera |
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