CN213874049U - Visual micrometer for measuring end face of steel pipe - Google Patents
Visual micrometer for measuring end face of steel pipe Download PDFInfo
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- CN213874049U CN213874049U CN202023242655.XU CN202023242655U CN213874049U CN 213874049 U CN213874049 U CN 213874049U CN 202023242655 U CN202023242655 U CN 202023242655U CN 213874049 U CN213874049 U CN 213874049U
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Abstract
The utility model provides a visual micrometer for measuring the end surface of a steel pipe, which comprises a base; the graduated scale is positioned at the front end of the base and close to the working surface of the steel pipe, and the graduated scale is placed to be horizontal to the lower bottom surface of the base; the laser displacement sensor is positioned at the front end of the base and close to the front end of the steel pipe, and measures the distance between the laser displacement sensor and the end face of the steel pipe; the alarm lamp is positioned at the rear end of the base and far away from the end face of the steel pipe, and gives an alarm when the size of the steel pipe does not meet the set requirement; the vision measuring mechanism is positioned on the base; the vision measuring mechanism comprises a main bearing frame, an auxiliary bearing frame with scales, a camera, an optical telecentric imaging lens, a driving motor and a camera base; the camera is connected with an image processing unit; the main bearing frame is connected with the auxiliary bearing frame through a connecting plate. By applying the technical scheme, the high-precision full-automatic detection of the end faces of the steel pipes in batches can be realized.
Description
Technical Field
The utility model relates to a steel pipe dimensional measurement's field specifically indicates a measure visual micrometer of steel pipe terminal surface.
Background
At present, in the hollow tube industry, the lengths of rolled tubes are manually measured by a micrometer for a long time when the sizes of the tube ends of the hollow tubes are measured, measurement data are few, visual judgment cannot be given to uneven wall thickness or ovality, measurement accuracy is greatly influenced by production rhythm, environment or measuring distance placing modes and subjective factors of measuring personnel. Although the existing visual detection method improves the efficiency, automation degree and objectivity of measurement, the existing computer visual measurement method cannot achieve the precision of manual measurement or achieve the range of manual measurement. The existing machine vision method cannot take the measurement range into consideration, such as 1000 mm outer diameter; and measurement accuracy, such as micron-scale accuracy.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a measure vision micrometer of steel pipe terminal surface realizes carrying out the full automated inspection of batch high accuracy to the terminal surface of steel pipe.
In order to solve the technical problem, the utility model provides a visual micrometer for measuring the end surface of a steel pipe, which comprises a base;
the scale is uniformly and accurately graduated, the subdivision minimum unit is millimeter, and the scale is placed to be horizontal to the lower bottom surface of the base;
the laser displacement sensor is positioned at the front end of the base and close to the front end of the steel pipe, and measures the distance between the laser displacement sensor and the end face of the steel pipe;
the alarm lamp is positioned at the rear end of the base and far away from the end face of the steel pipe, and gives an alarm when the size of the steel pipe does not meet the set requirement;
the device also comprises at least one visual measurement mechanism positioned on the base; the vision measuring mechanism comprises a main bearing frame, an auxiliary bearing frame with scales, a camera, an optical telecentric imaging lens, a driving motor and a camera base; the camera is placed on the camera base; the camera, the optical telecentric imaging lens, the driving motor and the camera base are all arranged on the auxiliary bearing frame; the camera is connected with an image processing unit;
at least one main bearing frame is arranged on the base; the main bearing frame is connected with the auxiliary bearing frame through a connecting plate.
In a preferred embodiment, the middle of the bottom of the connecting plate is provided with a nut, namely a ball screw connecting part; guide rails are arranged on two sides of the main bearing frame, sliding blocks with grooves connected with the guide rails are arranged on two sides of the connecting plate, the driving motor drives the screw rod to rotate, and nuts on the screw rod move relatively, so that the connecting plate moves axially along the screw rod.
In a preferred embodiment, the connecting plate and the secondary bearing frame are connected through threaded holes, if only one primary bearing frame is arranged on the base, the connecting plate is fixed at the central position of the bottom of the secondary bearing frame, and if two primary bearing frames are needed, the connecting plate is fixed at the front end of the secondary bearing frame, and is fixed at the rear end of the secondary bearing frame, so that the two visual measuring mechanisms can be used interactively.
In a preferred embodiment, the auxiliary bearing frame is connected with a threaded rod, the threaded rod is connected with a camera base, a camera and an optical telecentric imaging lens are arranged on the camera base, scales are marked on one side of the auxiliary bearing frame, and a knob at the rear end of the auxiliary bearing frame is rotated to drive the camera base to move along the axial direction of the threaded rod; the camera base moves along the axial direction of the threaded rod to control the working distances of different lenses; the camera base is used for bearing the movement of the camera.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
the utility model provides a measure vision micrometer of steel pipe terminal surface relies on the camera to acquire and data analysis calculates the realization to carry out the full automated inspection of batch high accuracy to the size of steel pipe accurately, has greatly improved measuring accuracy and precision.
Drawings
FIG. 1 is a top view of a visual micrometer for measuring the end surface of a steel pipe according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a base of a visual micrometer for measuring the end surface of a steel pipe according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view showing the position relationship between the main bearing frame and the sub-bearing frame of the visual micrometer for measuring the end surface of the steel pipe according to the preferred embodiment of the present invention;
FIG. 4 is a schematic view showing the positional relationship between the main bearing frame and the connecting plate of the visual micrometer for measuring the end surface of the steel pipe according to the preferred embodiment of the present invention;
fig. 5 is a schematic structural view of a sub-bearing frame of a visual micrometer for measuring the end surface of a steel pipe according to a preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
A visual micrometer for measuring the end face of a steel pipe, refer to figures 1 to 5, comprising a base 4;
the scale 2 is positioned at the front end of the base 4 and close to the working surface of the steel pipe 1, the scales of the scale 2 are uniform and accurate, the subdivision minimum unit is millimeter, and the scale 2 is placed to be horizontal to the lower bottom surface of the base 4; besides the solid scale 2, the method is also suitable for the virtual scale 2, for example, the scales are arranged at the bottom of the base 4, and the mirror on the auxiliary bearing frame 7 can reflect the scales on the base 4 at the bottom to the view of the camera 12 for shooting the end face of the steel pipe 1;
the device also comprises a laser displacement sensor 3 which is positioned at the front end of the base 4 and close to the front end of the steel pipe 1, wherein the laser displacement sensor 3 measures the distance between the laser displacement sensor 3 and the end face of the steel pipe 1;
the alarm lamp 6 is positioned at the rear end of the base 4 and far away from the end face of the steel pipe 1, and the alarm lamp 6 gives an alarm when the size of the steel pipe 1 does not meet the set requirement;
the device also comprises at least one visual measuring mechanism positioned on the base 4; the vision measuring mechanism comprises a main bearing frame 9, a secondary bearing frame 7 with scales, a camera 12, an optical telecentric imaging lens without distortion or with very little distortion, a driving motor 5 and a camera base 10; the camera 12 is placed on the camera mount 10; the camera 12, the optical telecentric imaging lens, the driving motor 5 and the camera base 10 are all arranged on the auxiliary bearing frame 7; the camera 12 is connected with an image processing unit; when the diameter of the steel pipe 1 is smaller, one vision measuring mechanism is adopted, when the diameter of the steel pipe 1 is larger but the wall thickness is smaller, two vision measuring mechanisms are adopted, and when the diameter of the steel pipe 1 is larger and the wall thickness is larger, a plurality of vision measuring mechanisms can be adopted;
at least one main bearing frame 9 is arranged on the base 4; the primary carrier 9 is connected to the secondary carrier 7 by a web 14.
The middle of the bottom of the connecting plate 14 is provided with a nut, namely a ball screw connecting part; guide rails 8 are arranged on two sides of the main bearing frame 9, sliding blocks 15 with grooves connected with the guide rails 8 are arranged on two sides of the connecting plate 14, the driving motor 5 drives the screw rod to rotate, and nuts on the screw rod move relatively, so that the connecting plate 14 moves axially along the screw rod. The ball screw can ensure the precision of movement, can realize return self-locking and can keep stable when the camera 12 collects images.
Connecting plate 14 and sub-carrier 7 are connected through threaded holes, but the connection position of sub-carrier 7 and connecting plate 14 is not fixed, and depends on the number of main carrier 9 on base 4, if only one main carrier 9 is on base 4, connecting plate 14 is fixed at the central position of the bottom of sub-carrier 7, if two main carriers 9 are needed, connecting plate 14 is fixed at the front end of sub-carrier 7, and one is fixed at the rear end of sub-carrier 7, so that the interactive use of two vision measuring mechanisms is realized.
A threaded rod is connected to the auxiliary bearing frame 7 and is connected with the camera base 10, a camera 12 and an optical telecentric imaging lens are arranged on the camera base 10, scales are marked on one side of the auxiliary bearing frame 7, and a knob 13 at the rear end of the auxiliary bearing frame 7 is rotated to drive the camera base 10 to move along the axial direction of the threaded rod; the working distances of different lenses are controlled by moving the camera base 10 along the axial direction of the threaded rod; the camera mount 10 is used to carry the camera 12 and can ensure that the lens path remains horizontal.
The working range and the depth of field of the optical telecentric imaging lens meet the following requirements:
under the entity scale 2: clearly imaging straight scale graduation lines and objects to be measured (such as a steel pipe 1 port) with the straight scale, wherein the imaging magnification factor is constant in the effective working range;
Each camera 12 is connected with an image processing unit, and the cameras 12 acquire images of the scale 2 and the edge of the steel pipe 1 at zero time difference.
For a system with 1 to 2 visual measurement mechanisms on a base 4, a graduated scale 2 in an image output by an image processing unit passes through the center of a view field, two edges of the wall thickness of a steel pipe 1 exist in the image, and a digital mark on the graduated scale 2 exists; for more than two vision measuring mechanism systems on the base 4, the graduated scale 2 in the image output by the image processing unit passes through the center of the view field, one edge of the wall thickness of the steel pipe 1 exists in the image, and a digital mark on the graduated scale 2 exists; the highlighting analysis processing unit analyzes and processes the image, and pixel-level accurate position positioning of the inner and outer diameter walls of the steel pipe 1 and accurate positioning of the lines of the graduated scale 2 are carried out; the image analysis processing unit also comprises a display component which can display the measurement result; in addition, the control terminal can integrate a plurality of image analysis processing units and output the analysis result.
The utility model provides a measure vision micrometer of steel pipe terminal surface relies on camera 12 accurate ground data acquisition and data analysis to calculate and realize carrying out the full automated inspection of batch high accuracy to the size of steel pipe 1, has greatly improved measuring accuracy and precision.
The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.
Claims (4)
1. A visual micrometer for measuring the end face of a steel pipe is characterized by comprising a base;
the scale is uniformly and accurately graduated, the subdivision minimum unit is millimeter, and the scale is placed to be horizontal to the lower bottom surface of the base;
the laser displacement sensor is positioned at the front end of the base and close to the front end of the steel pipe, and measures the distance between the laser displacement sensor and the end face of the steel pipe;
the alarm lamp is positioned at the rear end of the base and far away from the end face of the steel pipe, and gives an alarm when the size of the steel pipe does not meet the set requirement;
the device also comprises at least one visual measurement mechanism positioned on the base; the vision measuring mechanism comprises a main bearing frame, an auxiliary bearing frame with scales, a camera, an optical telecentric imaging lens, a driving motor and a camera base; the camera is placed on the camera base; the camera, the optical telecentric imaging lens, the driving motor and the camera base are all arranged on the auxiliary bearing frame; the camera is connected with an image processing unit;
at least one main bearing frame is arranged on the base; the main bearing frame is connected with the auxiliary bearing frame through a connecting plate.
2. The visual micrometer for measuring the end face of the steel pipe according to claim 1, wherein a nut, namely a ball screw connecting part, is arranged in the middle of the bottom of the connecting plate; guide rails are arranged on two sides of the main bearing frame, sliding blocks with grooves connected with the guide rails are arranged on two sides of the connecting plate, the driving motor drives the screw rod to rotate, and nuts on the screw rod move relatively, so that the connecting plate moves axially along the screw rod.
3. The visual micrometer for measuring the end face of the steel pipe as claimed in claim 2, wherein the connecting plate and the auxiliary bearing frame are connected through threaded holes, if only one main bearing frame is arranged on the base, the connecting plate is fixed at the central position of the bottom of the auxiliary bearing frame, if two main bearing frames are needed, one connecting plate is fixed at the front end of the auxiliary bearing frame, and the other connecting plate is fixed at the rear end of the auxiliary bearing frame, so that the two visual measuring mechanisms can be used alternately.
4. The visual micrometer for measuring the end face of the steel pipe as claimed in claim 3, wherein the sub-bearing frame is connected with a threaded rod, the threaded rod is connected with a camera base, a camera and an optical telecentric imaging lens are arranged on the camera base, scales are marked on one side of the sub-bearing frame, and a knob at the rear end of the sub-bearing frame is rotated to drive the camera base to move along the axial direction of the threaded rod; the camera base moves along the axial direction of the threaded rod to control the working distances of different lenses; the camera base is used for bearing the movement of the camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242655.XU CN213874049U (en) | 2020-12-29 | 2020-12-29 | Visual micrometer for measuring end face of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242655.XU CN213874049U (en) | 2020-12-29 | 2020-12-29 | Visual micrometer for measuring end face of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213874049U true CN213874049U (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023242655.XU Active CN213874049U (en) | 2020-12-29 | 2020-12-29 | Visual micrometer for measuring end face of steel pipe |
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| Country | Link |
|---|---|
| CN (1) | CN213874049U (en) |
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2020
- 2020-12-29 CN CN202023242655.XU patent/CN213874049U/en active Active
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