CN110567375A - Multi-workpiece parallel vision measurement precision sliding table - Google Patents
Multi-workpiece parallel vision measurement precision sliding table Download PDFInfo
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- CN110567375A CN110567375A CN201910961548.5A CN201910961548A CN110567375A CN 110567375 A CN110567375 A CN 110567375A CN 201910961548 A CN201910961548 A CN 201910961548A CN 110567375 A CN110567375 A CN 110567375A
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- 238000005259 measurement Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 81
- 230000000007 visual effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
Abstract
The invention discloses a precision sliding table for multi-workpiece parallel vision measurement, which comprises a portal frame vision acquisition mechanism 100, a carrying plate 200, a driving radial lead screw nut mechanism 300, a fixing plate 400, a driving axial lead screw nut mechanism 500, a driven axial sliding block mechanism 600 and a driven radial sliding block mechanism 700. The portal frame vision acquisition mechanism 100 is fixedly connected with an acquisition camera by a portal frame, a workpiece is clamped by the object carrying plate 200, and the workpiece is matched with the driving axial lead screw nut mechanism 500, the driving radial lead screw nut mechanism 300, the driven axial slide block mechanism 600 and the driven radial slide block mechanism 700 to finish the precise movement in the axial direction, the radial direction and the circumferential direction, so that the high-precision measurement and reconstruction of the workpiece are realized; the driving motor on the screw nut mechanism realizes automatic control and precise rotation through the communication between the upper computer and the lower computer, and is provided with a hand wheel, so that the manual adjustment is convenient, and the adaptability to the working environment is good; the fixed plate 400 is equipped with proximity switch sensors and limit switches for real-time feedback of the work piece operating position and self-protection of the device in case of a work failure. Accurate slip table carries thing board 200 can a plurality of work pieces of clamping simultaneously, and adapts to the task requirement of multiple vision acquisition mode, including monocular vision measurement, binocular vision measurement and structured light measurement, strong adaptability, degree of automation is high, has higher practicality in machine vision measurement field.
Description
Technical Field
the invention belongs to the technical field of machine vision measurement, and particularly relates to a precision sliding table for multi-workpiece parallel vision measurement.
Background
The machine vision measurement technology is to use equipment such as a camera, a special fixture and the like to carry out dynamic or static shooting on an object to be measured to obtain a sequence or a single-frame image, and the visual measurement can be applied to accurately measure a complex structure. In an actual industrial measurement environment, if the surface appearance of a workpiece to be measured is complex or multiple workpieces are measured simultaneously in parallel, the acquisition camera is difficult to acquire complete appearance in a single measurement, the acquisition camera is required to shoot from multiple angles, and imaging is reconstructed through feature matching of multiple pictures. In the measuring process, if the workpiece position is fixed, the camera needs to acquire images at different positions, the camera parameters need to be repeatedly calibrated, and if the measuring and positioning are not accurate, the measuring result is not accurate, and the working efficiency is not high.
Disclosure of Invention
The invention aims to provide a precision sliding table for multi-workpiece parallel vision measurement, which fixes the position of an acquisition camera, precisely controls the movement of an object carrying platform for clamping multiple workpieces and is used for solving the problems of repeated calibration of the camera, low efficiency and inaccurate measurement and positioning in the current vision measurement.
In order to solve the above vision measurement problem, the specific technical scheme of the invention is as follows:
A precision sliding table for multi-workpiece parallel vision measurement comprises a portal frame vision acquisition mechanism 100, a carrying plate 200, a driving radial lead screw nut mechanism 300, a fixing plate 400, a driving axial lead screw nut mechanism 500, a driven axial nut mechanism 600 and a driven radial nut mechanism 700, wherein the carrying plate 200 is controlled by the upper computer and the lower computer to drive a clamping workpiece to move so as to complete a vision measurement task; the precise sliding table fixing plate 400 and the portal frame vision acquisition mechanism 100 are arranged on the working platform, and the image acquisition mode of the portal frame vision acquisition mechanism 100 can select monocular, binocular or structured light measurement according to measurement requirements; the fixed plate 400 is provided with a slot for positioning and mounting proximity switch sensors 405, 406, 407, 408, 409 and 410, limit switches 401, 402, 403 and 404 are fixed on the fixed plate through screw connection, and the linear sliding guide rail 603 is connected with the fixed plate 400 through screws; the linear slide guide 603 is used to achieve smooth movement of the slide block 502 on the fixed plate 400 in the active axial lead screw-nut mechanism 500, the active axial lead screw nut mechanism 500 is connected to the fixing plate 400 through bolts of a supporting seat 501 and a fixing seat 505, bearings are arranged in the supporting seat 501 and the fixing seat 505, the screw 504 is used for being nested, one end of the screw 504 is connected with a rotating shaft of a driving motor 508 through a coupling 506, the driving motor 508 is installed on a motor base 507 through screw connection, the motor base 507 is installed on a fixing plate 400 through a screw at the bottom of the fixing plate 400, a hand wheel 509 is arranged on the rotating shaft at the other end of the driving motor 508, the driving radial screw nut mechanism 300 is connected with the driving axial screw nut mechanism 500 in the same mode, and the slide block connection mode of a driven axial nut mechanism 600 and a driven radial nut mechanism 700 is the same as the slide block 502 of the driving axial screw nut mechanism 500; the lower part of a sliding block 502 of the driving axial lead screw nut mechanism 500 is connected with the fixing plate 400 through a screw, the upper part of the driving axial lead screw nut mechanism is connected with a linear sliding guide rail 601 through a screw, an object carrying plate 200 is arranged above the linear sliding guide rail 601, and the object carrying plate 200 can finish clamping according to the structural shape and the number of workpieces.
Preferably, the camera in the portal frame vision acquisition mechanism 100 adopts a large constant MER-130-30UM camera, the upper computer adopts an Intel (R) Core (TM) i5-4200 CPU @2.80GHz processor, the memory is 8GB, and the lower computer adopts a singlechip controller.
Preferably, the slot of the fixed plate 400 and the proximity switch sensors 405, 406, 407, 408, 409, 410 and the linear sliding guide 603 are in transition fit to precisely position the proximity switch sensors 405, 406, 407, 408, 409, 410 by using metal proximity sensors.
Preferably, the driving motors 508 and 305 of the driving axial lead screw nut mechanism 500 and the driving radial lead screw nut mechanism 300 are step motors, and the handwheels 509 and 301 are uniformly knurled.
Preferably, countersunk screws are used as screws in the linear sliding guide rails 601 and 603.
The invention has the beneficial effects that:
1. The invention can precisely control the movement of the loading platform for clamping a plurality of workpieces to complete the scanning of the workpieces under the condition of ensuring that the measuring position of the camera is not changed, and can avoid the problem of repeated calibration of camera parameters compared with a measuring mode of fixing the workpieces and moving the camera, thereby greatly improving the measuring efficiency and precision;
2. the object carrying plate 200 and the sliding block 602, the sliding block 602 and the fixed plate 400 are connected through the linear sliding guide rails 601 and 603, so that the flatness is good, the stable operation of a precise sliding table can be ensured, the object carrying plate 200 can be provided with clamps according to the structure and the number of workpieces, and the clamping practicability is high;
3. The invention is provided with proximity switch sensors 405, 406, 407, 408, 409 and 410, can accurately control and feed back the operation state of the sliding table, realizes the limiting and zeroing operation, has real-time feedback control capability, can immediately cut off the power when the operation position is unreasonable due to the installation of the limit switches 401, 402, 403 and 404, protects the precise sliding table from being damaged, and has self-protection capability of the device;
4. the rotating shafts of the driving motors 508 and 305 of the driving axial lead screw nut mechanism 500 and the driving radial lead screw nut mechanism 300 are both provided with hand wheels 509 and 301 which can be manually adjusted according to conditions;
5. The clamping support of the acquisition camera can be suitable for more camera models, and the monocular, binocular, structured light and the like can be replaced according to the needs in an image acquisition mode, so that the clamping support has a wider application range.
Drawings
fig. 1 is a schematic overall structure diagram of a precision sliding table for multi-workpiece parallel vision measurement.
Fig. 2 is an exploded view of a precision slide table for multi-workpiece parallel vision measurement.
FIG. 3 is an exploded view of a precision slip table axial active lead screw nut mechanism for multi-workpiece parallel vision measurement.
FIG. 4 is an exploded view of a precision slip table radial active lead screw nut mechanism for multi-workpiece parallel vision measurement.
Fig. 5 is an exploded view of a precision slide driven slider structure for multi-workpiece parallel vision measurement.
Fig. 6 is a schematic diagram of a precision sliding table fixing plate component for multi-workpiece parallel vision measurement.
Detailed Description
The following further describes specific structures and embodiments of the present invention with reference to the drawings.
the structure of the invention is as shown in figures 1-6, and the following scheme is adopted:
example 1:
The structure of a precision sliding table for multi-workpiece parallel vision measurement comprises: the device comprises a portal frame vision acquisition mechanism 100, a carrying plate 200, a driving radial lead screw nut mechanism 300, a fixing plate 400, a driving axial lead screw nut mechanism 500, a driven axial sliding block mechanism 600 and a driven radial sliding block mechanism 700. The portal frame vision acquisition mechanism 100 and the fixing plate 400 are arranged on the working platform; the driving radial lead screw nut mechanism 300 and the driving axial lead screw nut mechanism 500 are connected to the fixing plate 400 through bolts on the supporting seats 302 and 501 and the fixing seats 308 and 505, the driving motors 305 and 508 are connected and fixed to the motor bases 306 and 507 through screws, the motor bases 306 and 507 are connected to the fixing plate 400 through screws on the bottom surface of the fixing plate 400, the lower parts of the sliding blocks 303 and 502 on the driving radial lead screw nut mechanism 300 and the driving axial lead screw nut mechanism 500 are connected with the fixing plate 400 through linear sliding guide rails 603, and the upper parts of the sliding blocks are connected with the object carrying plate 200 through linear sliding guide rails 601; the lower parts of the driven axial sliding block mechanism 600 and the driven radial sliding block mechanism 700 are in screw connection with the fixed plate 400 through a linear sliding guide rail 603, and the upper parts are in screw connection with the object carrying plate 200 through a linear sliding guide rail 601.
the driving axial lead screw and nut mechanism 500 comprises a supporting seat 501, a sliding block 502, a ball nut 503, a lead screw 504, a fixed seat 505, a coupling 506, a motor seat 507, a driving motor 508 and a hand wheel 509, wherein the driving motor 509 drives the lead screw 504 to rotate in the forward and reverse directions through the coupling 506, the hand wheel 509 can manually adjust the lead screw 504 to rotate, the nut mechanism converts the lead screw rotation into the linear motion of the sliding block, and the axial motion of the object carrying plate 200 is realized by matching with the driven axial sliding block mechanism 600.
The driving radial lead screw and nut mechanism 300 is composed of a hand wheel 301, a support base 302, a slide block 303, a nut 304, a lead screw 309, a fixed base 308, a coupling 307, a motor base 306 and a driving motor 305, and the operation mode is the same as that of the driving axial lead screw and nut mechanism 500.
The fixed plate 400 is provided with proximity switch sensors 405, 406, 407, 408, 409 and 410 for device zeroing and feedback control, and limit switches 401, 402, 403 and 404 for device operation protection.
Example 2:
In the invention, the operation steps of the precision sliding table for the multi-workpiece parallel vision measurement are as follows:
step I: arranging and installing a portal frame vision acquisition mechanism 100 and a precise sliding table mechanism according to measurement requirements, clamping a plurality of workpieces on an object carrying plate 200, driving screws 504 and 309 to rotate by driving motors 508 and 305, moving a sliding block to proximity switch sensors 409 and 406, feeding back the current position of the sliding block, and completing zero setting of the device, wherein the radial and axial operation modes are the same;
Step II: the driving motors 508 and 305 receive operation instructions, the screw rods 504 and 309 are driven to rotate through the couplers 506 and 307, the nut mechanism converts the rotation of the screw rods into linear motion of the sliding blocks, the driving shaft radial screw rod nut mechanism 500 has the same operation mode as the driving radial screw rod nut mechanism 300, and the driven axial sliding block mechanism 600 and the driven radial sliding block mechanism 700 are matched to realize the axial, radial and circumferential operation modes and complete the measurement task of the workpiece;
Step III: the proximity switch sensors 405, 407, 408 and 410 arranged on the fixed plate 400 can feed back the position of the object carrying plate 200, namely the position of the workpiece, and control the driving motors 508 and 305 to rotate according to the measurement requirement, so that the object carrying plate 200 drives the clamped workpiece to reach a proper measurement position; if the operation is failed, the limit switches 401, 402, 403 and 404 are triggered, so that the driving motors 508 and 305 can be stopped from rotating, and the device is protected.
Step IV: after the measurement is finished, the driving motors 508 and 305 are controlled to rotate under the action of the proximity switch sensors 409 and 406, so that the device is reset to zero again, and the next operation is facilitated.
The foregoing shows and describes the general principles and features of the present invention. The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention.
Claims (7)
1. the utility model provides a precision slip table of parallel vision measurement of multiplex spare which characterized in that: the gantry vision acquisition mechanism 100 and the fixing plate 400 are arranged on the same working platform to measure workpieces; the portal frame vision acquisition mechanism 100 is formed by fastening and connecting a portal frame and an acquisition camera through bolts; the driving axial lead screw nut mechanism 500 is connected to the fixing plate 400 through bolts on a supporting seat 501 and a fixing seat 505; the carrying plate 200 is in fastening connection with a sliding block of the driving axial lead screw nut mechanism 300 through a threaded hole on the linear sliding guide rail; the fixed plate 400 is provided with 6 proximity switch sensors 405, 406, 407, 408, 409 and 410, wherein the sensors 405, 407, 408 and 410 are used for feeding back left and right positions, the sensors 406 and 409 are used for feeding back zero positions, and the fixed plate is further provided with 4 limit switches 401, 402, 403 and 404 which are used for limiting the moving position limit of the object carrying plate 200; the connection mode of the driving radial lead screw nut mechanism 300, the object carrying plate 200 and the fixing plate 400 is the same as that of the driving axial lead screw nut mechanism 500 of the visual measurement precision sliding table, and the driven axial nut mechanism 600 and the driven radial nut mechanism 700 are matched with the driving axial lead screw nut mechanism 500 and the driving radial lead screw nut mechanism 300 to move synchronously.
2. The precision slide table for multi-workpiece parallel vision measurement according to claim 1, wherein: including portal frame vision acquisition mechanism 100 passes through bolt-up connection by portal frame and collection camera, and the collection camera is removable, and the design of portal frame base has the through-hole to fix through bolted connection and carry out image acquisition at work platform.
3. The precision slide table for multi-workpiece parallel vision measurement according to claim 1, wherein: the device comprises a fixing plate 400 fixed on a working platform through bolt connection, limit switches 401, 402, 403 and 404 connected on the fixing plate 400 through screws, proximity switch sensors 405, 406, 407, 408, 409 and 410 connected and positioned through screws in a groove of the fixing plate 400, and a linear sliding guide rail 603 fixed in the groove of the fixing plate 400 through screw connection.
4. the precision slide table for multi-workpiece parallel vision measurement according to claim 1, wherein: the axial lead screw nut mechanism 500 is fixed on the fixing plate 400 through the bolt connection of the supporting seat 501 and the fixing seat 505, the driving motor 508 in the axial lead screw nut mechanism 500 is fixed on the motor seat 507 through a screw, and the motor seat 507 is fixedly connected with the fixing plate 400 through a screw at the bottom of the fixing plate 400.
5. The precision slide table for multi-workpiece parallel vision measurement as claimed in claim 4, wherein: a lead screw 504 in the active axial lead screw nut mechanism 500 is connected with a supporting seat 501 and a fixed seat 505 through bearings, the left side of the lead screw is nested in the bearing of the supporting seat 501, and the right side of the lead screw is nested in the bearing of the fixed seat 505; the screw 504 is connected to the slider 502 via a ball nut 503, and the slider 502 is connected to a linear slide rail 603 fixed to the fixed plate 400.
6. the precision slide table for multi-workpiece parallel vision measurement according to claim 5, wherein: the right side of the lead screw 504 is connected with the left side of the rotating shaft of the driving motor 508 through a coupler 506, and the right side of the rotating shaft of the driving motor 508 is provided with a hand wheel 509 which is connected through a key; the slide block 602 on the driven axial nut mechanism 600 is in screw connection with the fixed plate 400 through a linear sliding guide rail 603; the connection of the driving radial lead screw nut mechanism 300 and the driven radial lead screw nut mechanism 700 is the same as the connection of the axial lead screw nut mechanism 300 and the driven axial nut mechanism 600.
7. The precision slide table for multi-workpiece parallel vision measurement according to claim 1, wherein: the object carrying plate 200 is connected with the slide block screws of the driving axial lead screw nut mechanism 500, the radial lead screw nut mechanism 300, the driven axial nut mechanism 600 and the driven radial nut mechanism 700 through the linear sliding guide rail 601, and the object carrying plate 200 can finish clamping according to the structural appearance of a workpiece and can simultaneously clamp a plurality of workpieces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910961548.5A CN110567375A (en) | 2019-10-11 | 2019-10-11 | Multi-workpiece parallel vision measurement precision sliding table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910961548.5A CN110567375A (en) | 2019-10-11 | 2019-10-11 | Multi-workpiece parallel vision measurement precision sliding table |
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| CN110567375A true CN110567375A (en) | 2019-12-13 |
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Cited By (2)
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| CN112763649A (en) * | 2020-12-04 | 2021-05-07 | 贵州大学 | Touch information acquisition device |
| CN114111571A (en) * | 2021-11-15 | 2022-03-01 | 天津大学 | Visual precision detection device for measuring special-shaped workpiece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114111571A (en) * | 2021-11-15 | 2022-03-01 | 天津大学 | Visual precision detection device for measuring special-shaped workpiece |
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