CN109013716B - Method, system and storage medium for online detection of position change of central axis of roller - Google Patents
Method, system and storage medium for online detection of position change of central axis of roller Download PDFInfo
- Publication number
- CN109013716B CN109013716B CN201810845988.XA CN201810845988A CN109013716B CN 109013716 B CN109013716 B CN 109013716B CN 201810845988 A CN201810845988 A CN 201810845988A CN 109013716 B CN109013716 B CN 109013716B
- Authority
- CN
- China
- Prior art keywords
- roller
- laser
- imaging plane
- track
- reference point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method, a system and a storage medium for detecting the position change of the central axis of a roller on line. Wherein, the method comprises the following steps: acquiring a laser signal of a reference point, wherein the reference point is arranged on the end face of a shaft head of the roller; obtaining a motion track of a reference point according to the laser signal; and obtaining the motion trail of the point to be measured according to the motion trail of the reference point and the actual position relation of the reference point and the point to be measured, wherein the point to be measured is positioned at the center of a circle of the end face of the shaft head of the roller, and the center of the circle is the central axis of the roller. The invention solves the technical problem that the position change of the central axis of the roller in the rolling process cannot be detected in real time due to the fact that detection limitation is more in the prior art.
Description
Technical Field
The invention relates to the field of detection of key parameters of rolling mill equipment, in particular to a method and a system for detecting position change of a central axis of a roller on line and a storage medium.
Background
More than 90% of metal materials are finished by rolling, and the rolling technology plays an important role in the metallurgical industry and national economic production, so that the improvement of the rolling quality is necessary.
The main factors influencing rolling are the precision of the mill housing, the precision of the roller and the matching precision of the bearing and the roller. The window of the mill housing establishes a stable and accurate position for the bearing seat of the roller, and the dimensional accuracy of the window is influenced by uneven foundation settlement, running abrasion and corrosion, poor overhauling accuracy and the like. The reduction of the size precision of the mill housing can cause the formation of larger crossed shafts between roller systems, the increase of the axial force of the rollers, the phenomena of deviation of plate strips, poor plate shape, abnormal equipment abrasion and the like. In addition, errors in the roll profile of the rolls lead to a reduction in the surface quality of the rolled product; the change of the clearance between the bearing and the housing of the rolling mill causes the uneven loading of the roller, changes the spatial position of the roller and reduces the rolling quality. The three components directly or indirectly influence the spatial position relationship of the roller, change the spatial angle of the roller in a rolling state and seriously influence the rolling quality, so that the realization of the online detection of the spatial position of the roller is very necessary.
At present, tools such as a steel wire drawing wire, a wire hanging hammer, a micrometer and the like are commonly used for detecting the size of a window of a rolling mill housing in the prior art, and the methods have many problems, such as off-line detection, long detection time, more participators and low efficiency, so that the spatial position relation of the central axis and the like of a roller in the rolling process cannot be detected in real time.
Aiming at the problem that the position change of the central axis of the roller in the rolling process cannot be detected in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method, a system and a storage medium for detecting the position change of a central axis of a roller on line, which at least solve the technical problem that the position change of the central axis of the roller in the rolling process cannot be detected in real time due to the fact that the detection limit is more in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a method of detecting a change in position of a central axis of a roll, including: acquiring a laser signal of a reference point, wherein the reference point is arranged on the end face of a shaft head of the roller; obtaining a motion track of the reference point according to the laser signal; and obtaining the motion trail of the point to be measured according to the motion trail of the reference point and the actual position relation of the reference point and the point to be measured, wherein the point to be measured is positioned at the center of a circle of the end surface of the shaft head of the roller, and the center of the circle is the central axis of the roller.
Further, obtaining the motion trajectory of the reference point according to the laser signal includes: and processing the laser signal by an image processing method to obtain the motion trail of the reference point.
Further, obtaining the motion trajectory of the reference point according to the laser signal includes: under the condition that the central line of the roller does not deviate, obtaining a circular motion track of the reference point according to the laser signal, and taking the circular motion track as a standard track; under the condition that the central line of the roller moves, obtaining an elliptical motion track of the reference point according to the laser signal, and taking the elliptical motion track as an offset track; and obtaining the offset angle of the central axis of the roller according to the coordinates of the offset track and the coordinates of the standard track.
Further, obtaining the offset angle of the central axis of the roll according to the coordinates of the offset trajectory and the coordinates of the standard trajectory comprises: and obtaining the offset angle of the central axis of the roller according to the included angle between the abscissa of the offset track and the abscissa of the standard track, wherein the abscissa of the offset track is the long axis of the elliptical motion track, the ordinate of the offset track is the short axis of the elliptical motion track, the abscissa of the standard track is the abscissa in a coordinate system taking the central axis of the roller as the ordinate, and the abscissa is parallel to the horizontal plane where the roller is located.
According to another aspect of the embodiments of the present invention, there is also provided a system for detecting a change in position of a central axis of a roll, including: the laser emitting device is used for emitting laser to an imaging plane, and the laser emitting module is arranged on the end surface of the shaft head of the roller and moves along with the movement of the roller; the imaging plane is used for receiving the laser emitted by the laser emitting device and is arranged between the end face of the shaft head and the acquisition module; the image acquisition device is used for acquiring an image projected in the imaging plane and is arranged at one end of the imaging plane, which is far away from the end face of the shaft head; the server is used for calculating the motion track of the point to be measured according to the motion track of the laser and the actual position relation between the laser emitting device and the point to be measured, and the server is connected with the image acquisition device, wherein the point to be measured is located at the center of a circle of the end face of the spindle head of the roller, and the center of the circle is the central axis of the roller.
Further, the imaging plane is a translucent material.
Further, the transmittance of the translucent material to visible light with the wavelength of 400nm-800nm is 50% -80%.
Furthermore, a bearing end cover is arranged on the end face of the shaft head, and a hole is formed in the position, corresponding to the laser emitting device, of the bearing end cover.
Further, the image acquisition device is a camera.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium characterized in that the storage medium includes a stored program, wherein the program executes the above method.
In the embodiment of the invention, a laser signal for acquiring a reference point is adopted, wherein the reference point is arranged on the end surface of a shaft head of a roller; obtaining a motion track of the reference point according to the laser signal; the motion trail of the point to be measured is obtained according to the motion trail of the reference point and the actual position relation of the reference point and the point to be measured, wherein the point to be measured is located at the circle center of the end face of the shaft head of the roller, and the circle center is the central axis of the roller.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a method of detecting a change in position of a roll center axis in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative system for detecting changes in roll center axis position in accordance with embodiments of the present invention;
FIG. 3 is a schematic view of an alternative roll end face according to an embodiment of the invention;
FIG. 4 is a schematic illustration of an alternative roll center axis offset in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a relationship for calculating a motion trajectory of a point to be measured according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a principle of detecting a position change sensitivity of a central axis of a roll according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for detecting a change in the position of the central axis of a mill roll, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that illustrated herein.
Fig. 1 is a method for detecting a change in the position of the center axis of a roll according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, acquiring a laser signal of a reference point, wherein the reference point is arranged on the end face of a shaft head of the roller;
step S104, obtaining a motion track of a reference point according to the laser signal;
and S106, obtaining the motion trail of the point to be measured according to the motion trail of the reference point and the actual position relation of the reference point and the point to be measured, wherein the point to be measured is located at the center of a circle of the end face of the spindle head of the roller, and the center of the circle is the central axis of the roller.
Through setting up laser emitter at the reference point, gather the laser signal of reference point and then obtain the motion trail of reference point, compare with the mode that prior art direct measurement needs many instruments and needs off-line detection, this embodiment can carry out real-time detection to the roll in rolling process, as long as there is little removal of roll central axis, just can detect its motion trail at once, and detection precision is high, and check-out time is short, has solved the problem that prior art detects the unable real-time detection that the restriction leads to more at rolling in-process roll central axis position change.
The above steps are described in an alternative embodiment with reference to fig. 2, 3 and 4:
and a laser emitting device is arranged at the reference point to emit laser, the position of the reference point is a point A, the axis of the roller is a point O, and the central axis of the roller is a Z axis. And acquiring the laser of the laser emitting device to obtain the motion trail of the point A. Two methods are used for obtaining the track of the point O from the point A, one method is that the track of the point A is obtained by adopting an image processing method and fitting, and then the motion track of the point O is obtained according to the spatial position relation of the point O and the point A; and secondly, directly obtaining a track image of the O point according to the spatial position relation of the O point and the A point, and fitting by adopting an image processing method to obtain a motion track of the O point.
As shown in fig. 5, when the roll rotates, the reference point a moves to the position of a ', and the roll axis O moves to the position of O', which is the point to be measured. The distance between the A and the end surface O of the roll shaft head in the Z direction is d, and the size of d is unchanged in the roll rotating process, so the calculation process can be simplified into the calculation of the distance between two points on the same plane, namely the coordinate of O 'is determined according to the coordinate of the A'.
Let A coordinate before the roller rotation be (x)A，yA) Coordinate of point O (x)O，yO) The coordinate of A' during the rotation of the roll is (x)A′，yA′) O' point coordinate (x)O′，yO′). Then there is the following relationship:
o, A are two points on a rigid body, and the roll rotation does not change the distance L between the two points.
After the roller rotates:
the rigid body rotates, the distance between AA 'and the rear body is equal to the distance between oo', namely
The coordinates of O, A, A 'in the above variables are known and the coordinates of O' can be solved by simultaneous equations.
In step S104, the laser signal of the reference point moves along with the movement of the rolling roller, and the movement track of the reference point is obtained according to the laser signal, in an alternative embodiment, the movement track of the reference point is obtained by processing the laser signal through an image processing method, which may be a hough circle transformation or the like.
Conventional detection methods have difficulty detecting small angular deviations of the rolls when such deviations are present. In an optional implementation mode, under the condition that the central line of the roller is not deviated, the circular motion track of the reference point is obtained according to the laser signal, and the circular motion track is used as the standard track; under the condition that the central line of the roller moves, obtaining an elliptical motion track of a reference point according to a laser signal, and taking the elliptical motion track as an offset track; and obtaining the offset angle of the central axis of the roller according to the coordinates of the offset track and the coordinates of the standard track.
The above steps convert the angular deviation of the central axis of the roller which is not easy to see into easy detection. As shown in fig. 6, when the central axis of the roll is offset to generate a space angle Φ, if the distance from the image acquisition device to the laser emission module (reference point) on the end surface of the shaft head is R1, the radian generated by the observable space angle Φ is L1; l1 is difficult to detect in the prior art, and the present embodiment utilizes the concept of conversion, the offset angle of the detected roll central axis can be increased by increasing the distance between the image acquisition device and the laser emission module (reference point), i.e. increasing R1 to R2, and the radian generated by the corresponding spatial angle Φ after increasing to R2 is L2, and L2 is easy to detect, so as to improve the sensitivity in detecting the small-angle offset of the roll central axis, and when detecting the roll spatial angle, the change of R1 can be realized by adjusting the distance between the image acquisition device and the laser emission module (reference point), so that the small-angle offset can be detected more easily to a certain extent.
After the coordinate system in the above step is selected, the abscissa may be used to calculate the offset angle of the center line of the roll, and the ordinate may also be used to calculate the offset angle of the center line of the roll. For example, as shown in fig. 4, when there is no offset of the roll center line, the locus of point a is a locus of a broken line in the figure and is a standard circle, and the point O of the axis is a point; when the central line of the roller has deviation, the track of the point A is an elliptic solid line in the figure, the track of the point O at the axis center is also an ellipse, an elliptic coordinate system is established by taking the major axis of the ellipse as an X ' axis and the minor axis as an Y ' axis, and the deviation angle of the central line of the roller is the included angle between the X ' and the X, namely the phi angle shown in figure 4.
By detecting the offset angle of the standard track of the reference point and the offset track coordinate system in the method, the sensitivity of laser projection to offset detection of the central axis space of the roller under a small angle can be improved, the offset angle of the central line of the roller can be obtained in real time, the efficiency is high, the detection time is short, and the cost is low.
The embodiment of the invention also provides a system for detecting the position change of the central axis of the roller, and the system can realize the functions of a laser emitting device, an imaging plane and an image acquisition device. It should be noted that the system for detecting the position change of the central axis of the roll according to the embodiment of the present invention may be used to perform the method for detecting the position change of the central axis of the roll according to the embodiment of the present invention, and the method for detecting the position change of the central axis of the roll according to the embodiment of the present invention may also be performed by the system for detecting the position change of the central axis of the roll according to the embodiment of the present invention. FIG. 2 is a schematic diagram of a system for detecting a change in the position of the central axis of a roll in accordance with an embodiment of the present invention. As shown in fig. 2, fig. 2 is a schematic view of a system for detecting a change in the position of the center axis of a roll according to an embodiment of the present invention. A system for detecting a change in the position of a central roll axis comprising:
the laser emitting device 3 is used for emitting laser to an imaging plane 7, and the laser emitting module is arranged on the shaft head end surface 5 of the roller and moves along with the movement of the rollers 1 and 2;
the imaging plane 7 is used for receiving laser emitted by the laser emitting device and is arranged between the end face of the shaft head and the acquisition module;
the image acquisition device 9 is used for acquiring an image projected in an imaging plane, and is arranged at one end of the imaging plane, which is far away from the end face of the shaft head;
and the server 10 is used for calculating the motion trail of the point to be measured according to the motion trail of the laser and the actual position relation between the laser emitting device and the point to be measured, and is connected with the image acquisition device, wherein the point to be measured is positioned at the center of a circle of the end face of the shaft head of the roller, and the center of the circle is the central axis of the roller.
The laser emitting device 3 is fixed on a shaft head end face 5 of the roller through a fixing device, can be a shaft head end face 5 of an upper roller shaft head 4, and can also be a shaft head end face of a lower roller shaft head 6, the roller is divided into an upper roller body 1 and a lower roller body 2, and a rolled piece 8 is to be rolled between the upper roller body 1 and the lower roller body 2. The laser emitting device can be a small laser, the wavelength range of laser emitted by the laser should be 400-800nm, the fixing device adopts a non-permanent fixing mode such as direct connection of a stud bolt and the end face of the roller or fixing of a magnetic seat and the like to meet the requirements of cleaning, maintenance and the like on the contacted surface, but installation resonance can be introduced in the fixing mode, so that the device can be directly fixed by adopting a bolt mode. The laser emission module is installed at the terminal surface of keeping away from the roll body of roll, and its quality is very little for the roll, can ignore to the quality influence of rolling the board.
Fixing a laser emission module on a roller, emitting laser to an imaging plane in the movement process of the roller, and recording the movement track of the laser emission module by the imaging plane; and the image acquisition module is used for acquiring the motion track of the laser emission module and establishing the motion track of the central line of the roller in a numerical calculation mode according to the motion track of the laser emission module. The laser emission module is arranged on the end face of the shaft head and has a certain distance with the roller body, and the influence on the rolling process can be ignored.
The image acquisition device may employ a camera, and the camera adjusts a position and an angle according to a semitransparent imaging plane (hereinafter referred to as an imaging plane). The laser emission module emits laser to the imaging plane, and changes the distance from the imaging plane to the end face of the roller to amplify the track deviation generated by a small-angle space angle under the roller motion state to different degrees; recording the motion track of the laser by a camera; and calculating the physical distance between the laser and the central line of the roller, and obtaining the movement locus conger of the central line of the roller by utilizing the movement locus of the laser to achieve the aim of detecting the movement of the central line of the roller in a real-time far field manner.
The imaging plane can be used for visual imaging and has the function of calibration. Because a systematic error exists in the embodiment, namely a parallel error of the roller plane and the camera target surface, specifically, if a non-parallel angle exists between the roller end surface and the camera target surface, a detected roller center trajectory diagram is changed from a perfect circle to an ellipse to cause an error, in order to overcome the systematic error, an imaging plane is introduced, the imaging plane is used as a standard plane for calibration, a camera adjusts a correct angle and position according to the imaging of the imaging plane, and the camera collects a laser beam penetrating through the imaging plane to form an image only related to the spatial position change of the roller. The position and the angle of the camera are corrected by the imaging plane, and the system error caused by the parallelism of the camera and the end face of the roller is eliminated.
The laser emission module is arranged on the end face of the roller through the system, when the roller works, the laser emission module moves circularly along with the roller, laser is emitted to irradiate the semitransparent imaging plane, a camera on the other side of the imaging plane obtains the motion track of the point laser emission module, the motion track of the central line of the roller is determined by an image processing method according to the distance between the laser emission module and the central line of the roller, the motion of the central line of the roller is detected on line in real time, and the system can simply and accurately obtain the motion track of a certain point on the end face of the roller so as to obtain the motion track of the central line of the roller. The photogrammetry system in the prior art is difficult to measure the small angle offset of the central axis of the roller, but the system realizes the problem that the prior art is difficult to measure by improving the sensitivity of the measurement of the small angle offset, and can measure the arbitrary small angle offset of the central axis of the roller in real time.
In an alternative embodiment, the distance between the imaging plane and the end face of the roller is adjustable, so that far-field measurement can be realized, and the defect that industrial field noise affects a detection system is avoided.
In an alternative embodiment, the imaging plane is a translucent material.
In an alternative embodiment, the translucent material has a transmittance of 50% to 80% for visible light having a wavelength of 400nm to 800 nm. (ii) a
By setting the semitransparent material with the wavelength of 400nm-800nm, laser beams with the wavelength of 532nm emitted by the laser emission module can penetrate through the semitransparent imaging plane, so that images are formed in the camera. Meanwhile, the parallelism of the laser emission module and the camera plane can be adjusted before the detection is started by observing the semitransparent imaging plane.
Under the condition that the end face of the roll shaft head is not provided with a bearing end cover, a threaded hole is directly drilled in the end face of the shaft head, and the laser emitting module is fixedly installed on the end face of the shaft head. In the above-mentioned case that the end face of the roll shaft head has a bearing end cap, in an alternative embodiment, the end face of the roll shaft head is provided with a bearing end cap, and a hole is provided at a position of the bearing end cap corresponding to the laser emitting device. For example, when the roller shaft head is provided with the bearing end cover, the mounting position of the laser emission module is the same as the position when the bearing end cover is not arranged, but the bearing end cover can shield the laser emitted by the laser emission module from an imaging plane, a hole needs to be formed in the corresponding position on the bearing end cover, the position of the hole corresponds to the mounting position of the laser emission module, the condition that the laser emitted by the laser emission module is not shielded is met, and the fixing mode is selected to be fixed through bolts. In the scheme, the detection result is not influenced by a space shielding point, the problem that the equipment and the product quality are caused by online detection of the spatial position of the roller difficultly in the prior art can be solved, and guarantee is provided for the full-effect and high-precision operation of the rolling mill.
In an alternative embodiment, the image capture device may be a camera. The camera may be a CCD camera and the server may be a computer. The CCD camera is matched with the size of the roller and the rotating speed of the roller and used for acquiring a track graph formed by laser transmitted by an imaging plane and establishing a motion track of the central line of the roller by using a computer according to the distance relation between the laser emitting module and the central axis of the roller. And identifying the track of the central line of the roller by using an image processing mode, such as a Hough circle change method, and judging the deviation condition of the central line of the roller according to the track of the central line of the roller. If the central line track is a standard circle, the central line of the roller has no offset; if the central line locus is an ellipse, the central line of the roller is deviated. Any angular deviation of the roll centreline may be detected from the centreline track.
The embodiment of the invention provides a storage medium, which comprises a stored program, wherein when the program runs, a device on which the storage medium is positioned is controlled to execute the method.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method of detecting a change in position of a central axis of a roll, comprising:
acquiring a laser signal transmitted to a semitransparent imaging plane by a laser transmitting device at a reference point through an image acquisition device, wherein the reference point is arranged on the end face of a shaft head of a roller, and the imaging plane is used for imaging the motion track of the reference point;
obtaining the motion trail of the reference point according to the laser signal transmitted by the imaging plane;
obtaining the motion trail of the point to be measured according to the motion trail of the reference point and the actual position relation of the reference point and the point to be measured, wherein the point to be measured is located at the center of a circle of the end face of the spindle head of the roller, and the center of the circle is the central axis of the roller;
the method for detecting the position change of the central axis of the roller further comprises the following steps:
the track deviation generated by a small-angle space angle under the roller motion state is amplified to different degrees by changing the distance from the image acquisition device to the laser emission device or changing the distance from the imaging plane to the laser emission device;
the imaging plane is also used for correcting and calibrating the parallel error between the end face of the spindle head and the target surface of the image acquisition device, and the correcting and calibrating process comprises the following steps: the imaging plane is used as a calibrated standard plane, the image acquisition device adjusts the correct angle and position according to the imaging of the imaging plane, and the image acquisition device acquires laser signals penetrating through the imaging plane to form an image only related to the change of the spatial position of the roller.
2. The method of claim 1, wherein obtaining the motion trajectory of the reference point according to the laser signal comprises:
and processing the laser signal by an image processing method to obtain the motion trail of the reference point.
3. The method of claim 1 or 2, wherein obtaining the motion trajectory of the reference point according to the laser signal comprises:
under the condition that the central line of the roller does not deviate, obtaining a circular motion track of the reference point according to the laser signal, and taking the circular motion track as a standard track;
under the condition that the central line of the roller moves, obtaining an elliptical motion track of the reference point according to the laser signal, and taking the elliptical motion track as an offset track;
and obtaining the offset angle of the central axis of the roller according to the coordinates of the offset track and the coordinates of the standard track.
4. The method of claim 3, wherein deriving the offset angle of the roll center axis from the coordinates of the offset trajectory and the coordinates of the standard trajectory comprises:
and obtaining the offset angle of the central axis of the roller according to the included angle between the abscissa of the offset track and the abscissa of the standard track, wherein the abscissa of the offset track is the long axis of the elliptical motion track, the ordinate of the offset track is the short axis of the elliptical motion track, the abscissa of the standard track is the abscissa in a coordinate system taking the central axis of the roller as the ordinate, and the abscissa is parallel to the horizontal plane where the roller is located.
5. A system for detecting changes in the position of the central axis of a roll, comprising:
the laser emitting device is arranged on the end surface of the shaft head of the roller and moves along with the movement of the roller;
the imaging plane is used for receiving the laser emitted by the laser emitting device and imaging the motion trail of the reference point, and the imaging plane is arranged between the end face of the shaft head and the image acquisition device;
the image acquisition device is used for acquiring an image projected in the imaging plane and is arranged at one end of the imaging plane, which is far away from the end face of the shaft head;
the server is used for calculating the motion trail of the point to be measured according to the motion trail of the laser and the actual position relation between the laser emitting device and the point to be measured, and the server is connected with the image acquisition device, wherein the point to be measured is located at the center of a circle of the end face of the spindle head of the roller, and the center of the circle is the central axis of the roller;
the distance between the image acquisition device and the laser emission device and the distance between the imaging plane and the laser emission device can be adjusted, and the track deviation generated by a small-angle space angle in a roller motion state can be amplified to different degrees by changing the distance between the image acquisition device and the laser emission device or changing the distance between the imaging plane and the laser emission device;
the imaging plane is also used for correcting and calibrating the parallel error between the end face of the spindle head and the target surface of the image acquisition device, and the correcting and calibrating process comprises the following steps: the imaging plane is used as a calibrated standard plane, the image acquisition device adjusts the correct angle and position according to the imaging of the imaging plane, and the image acquisition device acquires laser signals penetrating through the imaging plane to form an image only related to the change of the spatial position of the roller.
6. The system of claim 5, wherein the imaging plane is a translucent material.
7. The system of claim 6, wherein the translucent material has a transmittance of 50% to 80% for visible light having a wavelength of 400nm to 800 nm.
8. The system of claim 5, wherein the end surface of the shaft head is provided with a bearing end cover, and a hole is arranged at the position of the bearing end cover corresponding to the laser emitting device.
9. The system of claim 5, wherein the image capture device is a camera.
10. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845988.XA CN109013716B (en) | 2018-07-27 | 2018-07-27 | Method, system and storage medium for online detection of position change of central axis of roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845988.XA CN109013716B (en) | 2018-07-27 | 2018-07-27 | Method, system and storage medium for online detection of position change of central axis of roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109013716A CN109013716A (en) | 2018-12-18 |
| CN109013716B true CN109013716B (en) | 2020-01-21 |
Family
ID=64647188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810845988.XA Active CN109013716B (en) | 2018-07-27 | 2018-07-27 | Method, system and storage medium for online detection of position change of central axis of roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109013716B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821907A (en) * | 2019-03-05 | 2019-05-31 | 上海宝钢工业技术服务有限公司 | For the operation roll of mill depth of parallelism and the detection device and method of intersection degree |
| CN109821908A (en) * | 2019-03-05 | 2019-05-31 | 上海宝钢工业技术服务有限公司 | For the operation roll of mill depth of parallelism and the detection device of intersection degree |
| CN109894481B (en) * | 2019-03-07 | 2020-08-21 | 阳春新钢铁有限责任公司 | Method, device and system for tracking materials of cold bed of continuous rolling production line and medium |
| CN111744971B (en) * | 2019-03-29 | 2022-03-18 | 宝山钢铁股份有限公司 | Method and system for measuring cross angle of PC (polycarbonate) rolling mill |
| CN112355062B (en) * | 2020-09-28 | 2022-05-27 | 唐山钢铁集团有限责任公司 | Method for measuring window size of PC (personal computer) rolling mill by laser tracker |
| CN114659456B (en) * | 2020-12-23 | 2024-06-18 | 中国科学院微电子研究所 | Soft brush roll shaft spacing detection device, adjustment system and method |
| CN113263155B (en) * | 2021-06-07 | 2022-03-11 | 燕山大学 | Alignment method suitable for roll casting |
| CN113941604A (en) * | 2021-10-15 | 2022-01-18 | 华辰精密装备（昆山）股份有限公司 | Roller information intelligent identification system and method of integrated crown block |
| DE102022207411A1 (en) * | 2022-07-20 | 2024-01-25 | Sms Group Gmbh | Method and computer program for monitoring the condition of a rolling stand |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029400A (en) * | 1989-03-28 | 1991-07-09 | Clecim | Device for setting the position of the cyclinders of a rolling mill |
| CN101108397A (en) * | 2007-07-23 | 2008-01-23 | 鞍钢股份有限公司 | Error measuring device of weldless pipe continuous rolling mill roller and detecting method thereof |
| CN204486475U (en) * | 2015-03-16 | 2015-07-22 | 河北钢铁股份有限公司 | A kind of hot-rolling mill roll real-time displacement monitoring device |
| CN106500592A (en) * | 2016-09-19 | 2017-03-15 | 北京科技大学 | A kind of roll axis locus online test method based on machine vision |
| CN106975666A (en) * | 2017-06-08 | 2017-07-25 | 攀钢集团攀枝花钢钒有限公司 | Rolling mill roll position detecting system |
-
2018
- 2018-07-27 CN CN201810845988.XA patent/CN109013716B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029400A (en) * | 1989-03-28 | 1991-07-09 | Clecim | Device for setting the position of the cyclinders of a rolling mill |
| CN101108397A (en) * | 2007-07-23 | 2008-01-23 | 鞍钢股份有限公司 | Error measuring device of weldless pipe continuous rolling mill roller and detecting method thereof |
| CN204486475U (en) * | 2015-03-16 | 2015-07-22 | 河北钢铁股份有限公司 | A kind of hot-rolling mill roll real-time displacement monitoring device |
| CN106500592A (en) * | 2016-09-19 | 2017-03-15 | 北京科技大学 | A kind of roll axis locus online test method based on machine vision |
| CN106975666A (en) * | 2017-06-08 | 2017-07-25 | 攀钢集团攀枝花钢钒有限公司 | Rolling mill roll position detecting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109013716A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109013716B (en) | Method, system and storage medium for online detection of position change of central axis of roller | |
| CA2682635C (en) | Method for measuring the roundness of round profiles | |
| US7313869B1 (en) | Vehicle wheel alignment system and methodology | |
| CN108311545B (en) | Y-type rolling mill continuous rolling centering and hole pattern detection system and method | |
| CN106500592B (en) | A kind of roll axis spatial position online test method based on machine vision | |
| US10697766B1 (en) | Method and apparatus for compensating vehicle inspection system measurements for effects of vehicle motion | |
| CN103017684A (en) | Device and method for detecting roundness and straightness of cylindrical holes by coaxial light | |
| US10444010B2 (en) | Method for detecting support surface variations during wheel alignment rolling compensation procedure | |
| JP2017194311A (en) | Gear shape measuring device and gear shape measurement method of gear | |
| EP2960621B1 (en) | Shape inspection device | |
| CN111322950B (en) | Method for positioning cylinder position by line structured light sensor and its use | |
| US20150109626A1 (en) | Tire Digitizer | |
| CN111307073A (en) | Device for measuring coaxiality deviation of rotary transformer stator and rotor | |
| US11192158B2 (en) | Apparatus for detecting relative positioning information between rolls, and method for measurement roll alignment state by using same | |
| CN113670196B (en) | Method and device for measuring radial runout of precision spindle without standard rod | |
| CN115325946A (en) | System and method for simultaneously detecting size of end of steel pipe and inner wall defects | |
| CN113551619B (en) | On-line measuring method and device for straightness of seamless steel pipe | |
| CN112058920B (en) | Hole type calibration method and calibration system for rolling mill and guide | |
| CN104061897A (en) | Large split type nut column coplanarity detection method | |
| JPH073327B2 (en) | Method and apparatus for automatic measurement of tubular products | |
| Wang et al. | An on-machine and vision-based depth-error measurement method for micro machine tools | |
| CN108020176B (en) | Biplane angle measurement method and application thereof | |
| CN111426278A (en) | Dynamic measurement method for blade tip clearance of mine ventilator | |
| CN109737876A (en) | A kind of laser and optics composite probe measurement method and device | |
| Pei et al. | Vibration errors compensation method based on self-feature registration for the 3-D dynamic measurement of metallic sealing ring forming surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |