CN210464383U - Guide rail detection device - Google Patents
Guide rail detection device Download PDFInfo
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- CN210464383U CN210464383U CN201921049301.8U CN201921049301U CN210464383U CN 210464383 U CN210464383 U CN 210464383U CN 201921049301 U CN201921049301 U CN 201921049301U CN 210464383 U CN210464383 U CN 210464383U
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Abstract
The utility model discloses a guide rail detection device, including the image shooting module, the displacement measurement module, direction slide rail and actuating mechanism, utilize actuating mechanism drive image shooting module to remove along the direction slide rail, make the image shooting module be on a parallel with the guide rail direction removal that awaits measuring, and shoot the mounting hole of guide rail that awaits measuring through the image shooting module and acquire the mounting hole position, utilize the displacement measurement module to measure the displacement volume of image shooting module along the guide rail length direction that awaits measuring simultaneously, combine the displacement volume of image shooting module and shoot the picture like this and calculate the pitch-row of obtaining the mounting hole, realize the high accuracy automated measurement of guide rail pitch-row, need not manual operation, measurement accuracy is high.
Description
Technical Field
The utility model relates to an image detection technical field, in particular to guide rail detection device.
Background
The guide rail is used as a guide device, can realize high-precision linear motion under the condition of load, is widely applied to processing equipment, and is important for precision detection of the guide rail because the precision of the guide rail directly influences the processing precision.
The installation of present guide rail is connected through the mounting hole usually, offers the mounting hole along length direction on the guide rail, utilizes the bolt to pass the mounting hole and fixes the guide rail, because the guide rail can be in the state of high load at long-term use, if the interval setting of mounting hole is not reasonable can cause the guide rail atress inhomogeneous, if the mounting hole pitch-row is too big, influences the stability of guide rail easily, causes the guide rail to break away from the inefficacy even, influences the machining precision. The detection of the hole pitch of the existing guide rail mounting holes is usually measured in a manual mode, the detection process wastes time and labor, the detection error is large, and the measurement accuracy is low. An automatic detection device for the guide rail mounting hole does not appear in the market.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a detection device suitable for guide rail, can realize the high accuracy automated measurement of guide rail mounting hole pitch-row.
According to the utility model provides a pair of guide rail detection device, include:
the image shooting module is used for shooting the mounting hole of the guide rail to be tested;
the displacement measuring module is used for measuring the displacement of the image shooting module along the length direction of the guide rail to be measured;
the image shooting module can be connected to the guide slide rail in a sliding manner, and the displacement measuring module is arranged on the guide slide rail;
and the driving mechanism drives the image shooting module to move along the guide slide rail so as to shoot the positions of the mounting holes on the guide rail to be detected.
Preferably, still including being used for fixing the positioning mechanism of guide rail that awaits measuring, positioning mechanism includes the base, locates reference column and cylinder on the base, the push rod of cylinder with the reference column corresponds and presss from both sides tightly with the cooperation the guide rail that awaits measuring. Simple structure is practical, utilizes a plurality of positioning mechanism to arrange along the guide rail length direction that awaits measuring, and applicable tight location of clamp in the different models guide rail that awaits measuring.
Preferably, the test fixture further comprises a roller for supporting the guide rail to be tested, and the roller is arranged to be flush with the end face of the base supporting the guide rail to be tested. The roller is used for supporting the guide rail to be measured, so that the guide rail to be measured can move left and right to be positioned accurately on the end surface in the length direction; meanwhile, due to the fact that the roller wheel is in line contact with the guide rail to be detected, when the positioning mechanism clamps the guide rail to be detected, the influence of friction force on free bending of the guide rail to be detected can be reduced, and the parallelism of the guide rail to be detected and the guide slide rail in the length direction is guaranteed.
Preferably, the image shooting module comprises an industrial camera and a magnifier, and the shooting area of the industrial camera is adjusted through the magnifier.
Preferably, the driving mechanism comprises a sliding seat, a driving motor and a transmission mechanism, the image shooting module is installed on the sliding seat, the sliding seat is connected with the guide sliding rail, and the driving motor drives the sliding seat to move along the guide sliding rail through the transmission mechanism. The structure is stable and firm, the sliding movement of the image shooting module is more stable, and the shooting precision is higher.
Furthermore, a position adjusting mechanism for adjusting the height position of the industrial camera is arranged on the sliding seat, and the position of the industrial camera is finely adjusted through the position adjusting mechanism, so that the shooting area is adjusted.
Preferably, the displacement measuring module is a magnetic grid displacement sensor.
Has the advantages that: this guide rail detection device detects to the mounting hole of the guide rail that awaits measuring, utilize actuating mechanism drive image shooting module to remove along the direction slide rail, make image shooting module move parallel to the guide rail direction that awaits measuring, and shoot the mounting hole of guide rail that awaits measuring through image shooting module and acquire the mounting hole position, utilize displacement measurement module to measure the displacement volume of image shooting module along the guide rail length direction that awaits measuring simultaneously, combine the displacement volume of image shooting module and the picture of shooing to calculate the pitch-row of obtaining the mounting hole like this, realize the high accuracy automated measurement of guide rail pitch-row, need not manual operation, measurement accuracy is high, thereby guarantee the evenly distributed of guide rail mounting hole that awaits measuring.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic view of the overall structure of a guide rail detection device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
fig. 4 is a schematic structural diagram of an image capturing module according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a positioning mechanism in an embodiment of the present invention;
fig. 6 is a schematic structural view of a roller in an embodiment of the present invention;
fig. 7 is a flowchart of a rail detection method according to an embodiment of the present invention;
fig. 8 is a flowchart of an algorithm of a hole edge finding program according to an embodiment of the present invention;
fig. 9 is a photograph of the edge of the hole taken by the industrial camera according to the embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 3, the guide rail detection apparatus provided in the embodiment includes a frame 10, where an image capturing module 20, a displacement measuring module 40, a guide rail 50, and a driving mechanism 30 are disposed on the frame 10, where the image capturing module 20 is configured to capture a mounting hole 81 of a guide rail 80 to be detected; the displacement measurement module 40 is used for measuring the displacement of the image shooting module 20 along the length direction of the guide rail 80 to be measured, the displacement measurement module 40 is installed on the side of the guide rail 50, the image shooting module 20 is slidably connected to the guide rail 50, the guide rail 50 is parallel to the guide rail 80 to be measured, the image shooting module 20 is driven by the driving mechanism 30 to move along the guide rail 50, namely, the image shooting module 20 moves along the length direction of the guide rail 80 to be measured, and the displacement measurement module 40 detects the position of the image shooting module 20 in real time during movement. And processing the shot mounting hole 81 picture and calculating the hole pitch of the mounting hole 81 by combining the displacement of the image shooting module 20, thereby realizing high-precision automatic measurement of the hole pitch of the guide rail.
In order to improve the structural stability, two parallel industrial aluminum profiles are arranged on the rack 10, wherein the guide slide rail 50 is installed on the top surface of the left aluminum profile 11, the guide slide rail 50 is a guide rail pair, the displacement measurement module 40 is installed on the side surface of the aluminum profile, the displacement measurement module 40 of the embodiment is a magnetic grid displacement sensor, the magnetic grid displacement sensor is a displacement sensor which utilizes the magnetic action of a magnetic grid and a magnetic head to measure, and the digital sensor is a digital sensor, has lower cost and is convenient to install and use. The magnetic grid displacement sensor comprises a magnetic grid, a magnetic head and a detection circuit, when in measurement, the magnetic head and the magnetic grid output signals when in detection, the detection circuit outputs the displacement of the magnetic head relative to the movement of the magnetic grid to an upper computer, in the embodiment, when the image shooting module 20 moves, the magnetic head is driven to move linearly along the magnetic grid, so that the magnetic head and the magnetic grid generate relative movement to measure the displacement of the image shooting module 20.
In operation, the magnetic grid displacement sensor is capable of detecting the displacement of the image capture module 20 in real time. The top surface of the right aluminum profile 12 is provided with a positioning mechanism 60 and rollers 70, in the embodiment, three positioning mechanisms 60 and four rollers 70 are arranged and distributed at intervals, during measurement, the guide rail 80 to be measured is placed on the positioning mechanism 60 for positioning, the rollers 70 support the guide rail 80 to be measured, and each positioning mechanism 60 is parallel to the guide rail 50, so as to ensure the focusing accuracy of the image shooting module 20 on the guide rail 80 to be measured during measurement.
Referring to fig. 5, in the embodiment, the positioning mechanism 60 includes a base 61, a positioning column 62 and a cylinder 63 which are arranged on the base 61, a square steel pipe is used as the base 61, the base 61 is fixed on the right side aluminum profile 12 through an installation block 65, a cylindrical positioning column 62 is installed at one end of the base 61, the cylinder 63 is installed at the other end, a push rod 64 of the cylinder 63 corresponds to the positioning column 62, a guide rail 80 to be tested is placed between the positioning column 62 and the cylinder 63, the cylinder 63 drives the push rod 64 to extend out and to be matched with the positioning column 62 to clamp the guide rail 80 to be tested, and the positioning mechanism 60 is arranged along the length direction of the guide rail 80 to be tested in the embodiment. The positioning columns 62 of the positioning mechanisms 60 are arranged parallel to the guide rail 50, so that the to-be-tested guide rail 80 can be ensured to be parallel to the guide rail 50 when the to-be-tested guide rail 80 is clamped and positioned.
Referring to fig. 6, the roller 70 is used for supporting the guide rail 80 to be measured, the roller 70 is installed on the top surface of the aluminum profile through the support 71, one roller 70 is respectively arranged between the adjacent positioning mechanisms 60, the arrangement of the roller 70 is kept level with the end surface of the base 61 for supporting the guide rail 80 to be measured, namely, when the guide rail 80 to be measured is placed on the base 61, the roller 70 can just support the guide rail 80 to be measured, and the roller 70 can assist the guide rail 80 to be measured to move and adjust the position along the length direction. Because the roller 70 is in line contact with the guide rail 80 to be measured, when the positioning mechanism 60 clamps the guide rail 80 to be measured, the influence of friction force on the free bending of the guide rail 80 to be measured can be reduced, the parallelism of the guide rail 80 to be measured and the guide slide rail 50 in the length direction is ensured, and the use is more flexible and convenient.
Referring to fig. 4, the driving mechanism 30 adopted in the embodiment includes a sliding base 32, a driving motor 31 and a transmission mechanism, the image capturing module 20 is installed on the sliding base 32, the image capturing module 20 includes an industrial camera 21 and a magnifying lens 22, the magnifying lens 22 is connected to the front end of the industrial camera 21, the sliding base 32 is slidably connected with a guide slide rail 50, the driving motor 31 drives the sliding base 32 to move along the guide slide rail 50 through the transmission mechanism, and the driving motor 31 can be installed on the sliding base 32 or the rack 10. Taking the driving motor 31 mounted on the sliding seat 32 as an example for explanation, as shown in fig. 2-4, the transmission mechanism includes a gear 33 and a rack 34, the rack 34 is mounted on the top surface of the left aluminum profile 11 and is parallel to the guiding slide rail 50, the driving motor 31 is fixed on the sliding seat 32 and is connected with the gear 33, the gear 33 is in meshing transmission with the rack 34, so that when the driving motor 31 drives the gear 33 to rotate, the gear 33 moves along the rack 34, thereby driving the sliding seat 32 to move along the guiding slide rail 50, the structure is stable and firm, the sliding movement of the industrial camera 21 and the magnifying lens 22 is more stable, and the shooting precision is higher. Of course, the transmission mechanism is not limited to the transmission mode of the gear 33 and the rack 34, and the transmission mechanism can also adopt structures such as a transmission belt and a synchronous wheel for transmission.
Referring to fig. 4, in order to adjust the shooting position of the industrial camera 21, it is easy to understand that, a position adjusting mechanism 23 is disposed on the slide 32, and the height position of the industrial camera 21 is finely adjusted by the position adjusting mechanism 23, so as to adjust the shooting area, that is, the installation hole 81 can be accurately shot by the industrial camera 21, and the focusing precision of the industrial camera 21 on the installation hole 81 during measurement is ensured, the position adjusting mechanism 23 includes a handle 231 and an adjusting screw 232, the handle 231 drives the adjusting screw 232 to rotate, so that the adjusting screw 232 drives the magnifying lens 22 to move up and down, and the industrial camera 21 moves along with the magnifying lens 22, so as to achieve the purpose of finely adjusting the shooting position of the industrial camera 21, the position adjusting mechanism 23 belongs to a fine adjusting device of an industrial camera that is conventional in the art, and the.
In the embodiment, the industrial camera 21 adjusts the shooting area through the magnifying glass 22, the shooting visual field of the industrial camera 21 is controlled to be a square area of 2mmX2mm, in order to make the measurement accuracy higher, the shooting resolution of the industrial camera 21 is set to be 1024x768, because the aperture of the mounting hole 81 is larger than that of the shooting visual field, the shooting area can not shoot the image of the whole hole, therefore, during the measurement, the computer controls to align the visual field of the industrial camera 21 to the hole edge 82 on one side of the mounting hole 81, the image in the shooting visual field is enlarged and projected to the CMOS photosensitive device of the industrial camera 21, an image photo with the resolution of 1024x768 is generated through the internal processing of the industrial camera 21, the pixel position data of the shot hole edge 82 in the photo is obtained, the pixel position data of the shot hole edge 82 in the photo is calculated with the position data measured by the displacement measuring module 40, the position size of the hole edge 82, then, the industrial camera 21 is moved to the other side of the hole, and the same operation is performed, so as to obtain the position size of the other side of the hole. The position size of the hole center can be obtained by averaging the two values, the position size of the hole center of the first mounting hole 81 on the guide rail 80 to be measured and the position sizes of the hole centers of the other mounting holes 81 are shot by using the same method, the numerical value of the hole pitch size of any mounting hole 81 and the first mounting hole 81 of the guide rail 80 to be measured can be obtained, and high-precision automatic measurement of the hole pitch of the mounting holes 81 is realized.
In addition, referring to fig. 7, a rail detection method is provided, which is based on the rail detection device to realize automatic measurement of the pitch of the mounting holes 81, and specifically includes the following steps:
step 1, measuring the displacement of the image shooting module 20 moving along the length direction of the guide rail 80 to be measured. The specific steps are that the guide rail 80 to be detected is placed on the guide rail detection device and is fixedly positioned, the image shooting module 20 moves along the length direction of the guide rail 80 to be detected so as to shoot the position of the mounting hole 81 on the guide rail 80 to be detected, and the magnetic grid displacement sensor is utilized to obtain the displacement of the image shooting module 20 in real time when the image shooting module 20 moves.
And 2, shooting the mounting hole 81 on the guide rail 80 to be measured by the image shooting module 20, and calculating the hole center position by combining the displacement. Because the shooting resolution of the adopted industrial camera 21 is 1024 × 768, the aperture of the mounting hole 81 is larger than the shooting view of the industrial camera 21, and the shooting area cannot shoot the image of the whole hole, during measurement, the industrial camera 21 sequentially shoots the hole edges at two sides of the mounting hole 81 under the control of a computer, the position sizes of the hole edges at two sides in the length direction of the guide rail 80 to be measured are obtained respectively through processing, then the position sizes of the hole edges are added and averaged, and the position size of the hole center can be obtained, wherein the data processing of the pictures and the corresponding calculation method are executed by the computer.
And step 3, obtaining the hole distance between the mounting holes 81 according to the hole center positions of the mounting holes 81. And (3) obtaining the hole center position size of the first mounting hole 81 and the hole center position sizes of other mounting holes 81 on the guide rail 80 to be measured by the measurement in the step (2), and obtaining the hole distance between the first mounting hole 81 and the second mounting hole 81 by subtracting the hole center position size of the first mounting hole 81 from the hole center position size of the second mounting hole 81, and so on, thereby obtaining the hole distance size value between any mounting hole 81 and the first mounting hole 81 of the guide rail 80 to be measured, and realizing the high-precision automatic measurement of the hole distance of the mounting holes 81.
Referring to fig. 8, in an embodiment, the step 2 obtains the size of the hole center position by using a hole edge searching program algorithm, taking the shooting of the first mounting hole 81 on the guide rail 80 to be measured as an example, the measurement steps of other mounting holes 81 are the same, and the specific steps include:
step 2a, controlling the shooting view of the industrial camera 21 in a square area of 2mm × 2mm, setting the shooting resolution to be 1024 × 768, shooting a picture in which a single pixel corresponds to an actual size of 2mm/1024 being 0.002mm, shooting the hole edge 82 on the left side of the mounting hole 81 on the guide rail 80 to be measured by the industrial camera 21, as shown in fig. 9, performing digital filtering analysis processing on all pixels of the shot picture to obtain pixel position data of the shot hole edge 82 in the picture, and calculating the position of the left hole edge 82 in the length direction of the guide rail 80 to be measured by combining the pixel position data of the hole edge 82 with the displacement. The digital filtering analysis processing comprises pixel interception processing, data average processing and data judgment processing.
And 2b, moving the industrial camera 21 to the hole edge on the right side of the mounting hole 81, keeping the shooting resolution of the industrial camera 21 unchanged, performing digital filtering analysis on all pixels of the shot picture to obtain pixel position data of the right hole edge in the picture, and calculating the position of the right hole edge in the length direction of the guide rail 80 to be measured by combining the pixel position data of the hole edge with the displacement.
And 2c, adding the position data of the hole edges at the two sides and averaging to obtain the position of the hole center. Thus, the hole center position size of each mounting hole 81 on the guide rail 80 to be measured is sequentially measured according to the above steps, and then the pitch size value of the mounting holes 81 of the guide rail 80 to be measured can be obtained according to the above step 3.
In the above steps, the position of the hole edge in the longitudinal direction of the rail 80 to be measured is calculated by combining the pixel position data of the hole edge with the displacement amount, and the calculation method is: the pixel position of the hole edge is the pixel size of the hole edge and the left edge of the picture, the displacement is the displacement size of the edge of the picture shot by the industrial camera 21 in the length direction of the guide rail 80 to be measured, and the pixel size of the hole edge and the displacement size are added to obtain the position of the hole edge in the length direction of the guide rail 80 to be measured. Taking the measurement of the hole edge on the left side of the mounting hole 81 as an example, when the industrial camera 21 moves to align with the hole edge on the left side of the mounting hole 81, the displacement measured by the magnetic grid displacement sensor is the displacement of the industrial camera 21 moving along the guide rail 50, and the displacement dimension is equivalent to the displacement dimension of the left edge of the picture shot by the industrial camera in the length direction of the guide rail 80 to be measured, so that the position dimension of the hole edge is equal to the displacement dimension plus the pixel dimension of the hole edge on the picture, and the measurement precision of the measurement method is high.
In an embodiment, the digital filtering analysis processing includes pixel clipping processing, data averaging processing, and data judgment processing, where the pixel clipping processing is performed at a resolution of 1024X768 of a picture taken by the industrial camera 21, the picture includes 1024X768 data points (horizontal is 1024 columns and vertical is 768 rows), each data point corresponds to one RGB, and in order to reduce the data amount of required data, increase the data processing speed, and reduce the influence of the radian of the hole edge on the hole edge judgment, only data with a height of 200-300 pixels in RGB is taken for processing, which is the pixel clipping processing, and then the clipped data is subjected to the data averaging processing, so as to reduce the influence of burrs on the hole edge judgment. It can be seen from the shot picture that there is an obvious bright-dark cut-off at the shot hole edge position, and the computer program can acquire the position of the hole edge in the picture only by judging the averaged data according to the set valve value. Of course, the shooting resolution and the number of pixel intercepts are set according to the actual measurement accuracy requirement, and are not limited to the value range of the embodiment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. A guide rail detection device is characterized in that: the method comprises the following steps:
the image shooting module is used for shooting the mounting hole of the guide rail to be tested;
the displacement measuring module is used for measuring the displacement of the image shooting module along the length direction of the guide rail to be measured;
the image shooting module can be connected to the guide slide rail in a sliding manner, and the displacement measuring module is arranged on the guide slide rail;
and the driving mechanism drives the image shooting module to move along the guide slide rail so as to shoot the positions of the mounting holes on the guide rail to be detected.
2. The guide rail detecting device according to claim 1, wherein: still including being used for fixing the positioning mechanism of guide rail that awaits measuring, positioning mechanism includes the base, locates reference column and cylinder on the base, the push rod of cylinder with the reference column corresponds with the cooperation and presss from both sides tightly the guide rail that awaits measuring.
3. The guide rail detecting device according to claim 2, wherein: the roller is used for supporting the guide rail to be tested, and the roller is arranged to be flush with the end face of the base supporting the guide rail to be tested.
4. The guide rail detecting device according to claim 1, wherein: the image shooting module comprises an industrial camera and a magnifying lens, and the shooting area of the industrial camera is adjusted through the magnifying lens.
5. The guide rail detecting device according to any one of claims 1 to 4, wherein: the driving mechanism comprises a sliding seat, a driving motor and a transmission mechanism, the image shooting module is installed on the sliding seat, the sliding seat is connected with the guide sliding rail, and the driving motor drives the sliding seat to move along the guide sliding rail through the transmission mechanism.
6. The guide rail detecting device according to claim 5, wherein: and the sliding seat is provided with a position adjusting mechanism for adjusting the height position of the industrial camera.
7. The guide rail detecting device according to claim 1, wherein: the displacement measurement module is a magnetic grid displacement sensor.
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| CN201921049301.8U CN210464383U (en) | 2019-07-05 | 2019-07-05 | Guide rail detection device |
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| CN201921049301.8U CN210464383U (en) | 2019-07-05 | 2019-07-05 | Guide rail detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319783A (en) * | 2019-07-05 | 2019-10-11 | 广东凯特精密机械有限公司 | A kind of guide rail detection device and detection method |
| CN112881305A (en) * | 2021-01-14 | 2021-06-01 | 王泽平 | Rapid detection equipment for aluminum profile |
-
2019
- 2019-07-05 CN CN201921049301.8U patent/CN210464383U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319783A (en) * | 2019-07-05 | 2019-10-11 | 广东凯特精密机械有限公司 | A kind of guide rail detection device and detection method |
| CN112881305A (en) * | 2021-01-14 | 2021-06-01 | 王泽平 | Rapid detection equipment for aluminum profile |
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