CN110631541A - Steel product shape measurement linearity detection and correction method - Google Patents
Steel product shape measurement linearity detection and correction method Download PDFInfo
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- CN110631541A CN110631541A CN201911051127.5A CN201911051127A CN110631541A CN 110631541 A CN110631541 A CN 110631541A CN 201911051127 A CN201911051127 A CN 201911051127A CN 110631541 A CN110631541 A CN 110631541A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
- G01B21/24—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes
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Abstract
The invention provides a method for detecting and correcting the linearity of the measurement of the shape of a steel product, which comprises the steps of scanning a displacement sensor along the length direction of the steel product to be measured, collecting the distance between the displacement sensor and the outer surface of the steel product to be measured, and establishing a coordinate system by taking the length direction of the steel product to be measured as an X axis and the distance between the displacement sensor and the outer surface of the steel product as a Y axis; reading coordinates of the middle points of all rib valleys of the steel to be detected in the coordinate system, and performing straight line fitting on the coordinates; calculating the vertical distance from the mark to the straight line of the middle points of all the rib valleys; and reading the maximum vertical distance, and if the maximum vertical distance is greater than the detection standard value, determining that the linearity of the steel is unqualified. The method can effectively correct the linear slope of the steel according to the detected data, can detect whether the linearity of the steel is qualified or not, and does not need to acquire other shape parameters of the steel if the linearity of the steel is not qualified.
Description
Technical Field
The invention relates to the field of steel shape parameter detection, in particular to a method for detecting and correcting the linearity of steel shape measurement.
Background
At present, the external shape parameters of steel comprise internal diameter, external diameter, rib height, rib width, lead and the like, the parameters can be directly measured by a micrometer and the like, and can also be acquired by a sensor and the like through some detection devices, when the parameters are acquired, one factor to be considered is whether the linearity of a workpiece to be detected is good, and if the linearity of the workpiece to be detected does not meet the requirement, the accuracy of the acquired external shape parameters is greatly reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method for detecting and correcting the linearity of the shape measurement of the steel.
In order to achieve the above object, the present invention provides a method for detecting and correcting the linearity of the shape measurement of steel, comprising the following steps:
s1, scanning the steel to be detected by a displacement sensor along the length direction of the steel to be detected, collecting the distance between the displacement sensor and the outer surface of the steel to be detected, and establishing a coordinate system by taking the length direction of the steel to be detected as an X axis and the distance between the displacement sensor and the outer surface of the steel as a Y axis;
s2, reading the coordinates of the middle points of the rib valleys of the steel material to be measured in the coordinate system, and performing straight line fitting on the coordinates;
s3, calculating the vertical distance from the coordinates of the middle points of all the rib valleys to the fitting straight line;
s4, reading the maximum vertical distance, if the maximum vertical distance is smaller than the detection standard value, considering the linearity of the steel product to be qualified, taking the slope of the straight line obtained by fitting as the linear slope of the steel product inclined due to placement, and taking the slope as the correction parameter for calculating the profile parameter of the steel product; and if the maximum vertical distance is larger than the detection standard value, the steel is considered to have the bending condition.
The method can effectively correct the linear slope of the steel according to the detected data, can detect whether the linearity of the steel is qualified or not, and does not need to acquire other shape parameters of the steel if the linearity of the steel is not qualified.
The preferred scheme of the method is as follows: if the maximum vertical distance is larger than a detection standard value, dividing the steel into two sections of sub-steel by taking the rib valley midpoint corresponding to the maximum vertical distance as a demarcation point, and respectively performing linear fitting again on the rib valley midpoints on the two sections of sub-steel;
and calculating the vertical distance from the center point of the rib valley of the two sections of sub-steel to the corresponding fitting straight line, and if the vertical distance is larger than the detection standard value, considering that the linearity of the steel is unqualified, and prompting that no measurement is needed, thereby further improving the accuracy of the linearity detection of the steel.
The preferred scheme of the method is as follows: the pair of displacement sensors are arranged on the cross section of the steel to be detected for two times and scan along the length direction of the steel to be detected, the data acquired by the two displacement sensors are respectively acquired, the data acquired by any one of the displacement sensors does not meet the requirement of a detection standard value, the linearity of the steel is considered not to meet the requirement, and the accuracy of the detection of the linearity of the steel can be further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a steel profile parameter detection device;
fig. 2 is a graph of data signals collected by the displacement sensor.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
As shown in fig. 1, a steel appearance parameter detection device, including base 1, be equipped with the first support 2 that is used for placing steel 3 that awaits measuring on base 1, second support 7, be provided with probe left and right movement mechanism 5 on this base 1, first motor 4 drive probe left and right movement mechanism 5 moves, test probe 6 sets up on probe left and right movement mechanism 5, and test probe 6 upper end and/or lower extreme are provided with displacement sensor respectively, displacement sensor scans steel 3 that awaits measuring along length direction, when setting up two sensors, steel 3 that awaits measuring is located between two displacement sensor, two displacement sensor scan steel 3 that awaits measuring along length direction.
The invention provides a method for detecting and correcting the linearity of steel shape measurement, which comprises the following steps:
and S1, scanning the steel to be detected along the length direction by using a displacement sensor to obtain the data acquired by the displacement sensor, acquiring the distance between the displacement sensor and the outer surface of each length position point of the steel to be detected by using the displacement sensor, and establishing a coordinate system by using the length direction of the steel to be detected as an X axis and the distance between the displacement sensor and the outer surface of the steel as a Y axis. The steel material is screw-thread steel or spiral rib steel, and the data signal collected by the displacement sensor is a signal similar to a square wave, as shown in fig. 2.
And S2, reading coordinates of the midpoint of each rib valley of the steel material to be measured in the coordinate system, and performing straight line fitting on the coordinates, wherein the fitted straight line equation is Ax + By + C is 0, and A, B, C is the coefficient of the fitted straight line equation obtained after the straight line fitting is completed and is a known quantity. When the displacement sensor is positioned above the steel and the data signal is acquired by the displacement sensor, the midpoint of the wave trough of the signal is the rib valley midpoint, and when the displacement sensor is positioned above the steel and the data signal is acquired by the displacement sensor, the midpoint of the wave crest of the signal is the rib valley midpoint. The fit-like approach here is preferably, but not limited to, fitting a straight line using a minimum second order multiplication.
S3, calculating the vertical distance between the midpoint coordinates of all the ribs and the fitting straight line, wherein the calculation formula is the vertical distance
x0Is the abscissa of the midpoint of the rib valley, y0The ordinate of the midpoint of the rib valley.
S4, reading the maximum vertical distance, if the maximum vertical distance is smaller than the detection standard value, considering the linearity of the steel material to be qualified, taking the slope of the straight line obtained by fitting as the linear slope of the steel material inclined due to placement, and taking the slope as the correction parameter for calculating the external dimension parameter of the steel material; if the maximum vertical distance is larger than the detection standard value, the linearity of the steel material is not qualified, and the steel material has a bending condition.
In order to further improve the accuracy of detecting the linearity of the steel, the following preferred schemes are provided in the embodiment:
if the maximum vertical distance is larger than a detection standard value, dividing the steel into two sections of sub-steel by taking the rib valley midpoint corresponding to the maximum vertical distance as a demarcation point, and respectively performing linear fitting again on the rib valley midpoints on the two sections of sub-steel;
calculating the vertical distance from the center point of the rib valley of the two sections of sub-steel to the corresponding fitting straight line, if the vertical distance which is larger than the detection standard value still exists, considering that the linearity of the steel is unqualified, and prompting that the measurement is not carried out; if all the vertical distances are smaller than the detection standard value, the linearity of the steel is considered to meet the requirement, and other parameters of the steel can be measured.
In order to further improve the accuracy of detecting the linearity of the steel, the embodiment further has a preferable scheme that:
and (3) arranging displacement sensors above and below the steel, analyzing the data acquired by the two displacement sensors by the method, and considering that the linearity of the steel is unqualified as long as the data acquired by one displacement sensor does not accord with the detection standard value.
The arrangement mode of the displacement sensor and the steel in the method can refer to the steel profile parameter detection device.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A steel shape measurement linearity detection and correction method is characterized by comprising the following steps:
s1, scanning the steel to be detected by a displacement sensor along the length direction of the steel to be detected, collecting the distance between the displacement sensor and the outer surface of the steel to be detected, and establishing a coordinate system by taking the length direction of the steel to be detected as an X axis and the distance between the displacement sensor and the outer surface of the steel as a Y axis;
and S2, reading the coordinates of the middle points of the rib valleys of the steel material to be measured in the coordinate system, and performing straight line fitting on the coordinates.
S3, calculating the vertical distance from the coordinates of the middle points of all the rib valleys to the fitting straight line;
s4, reading the maximum vertical distance, if the maximum vertical distance is smaller than the detection standard value, considering the linearity of the steel product to be qualified, taking the slope of the straight line obtained by fitting as the linear slope of the steel product inclined due to placement, and taking the slope as the correction parameter for calculating the profile parameter of the steel product; and if the maximum vertical distance is larger than the detection standard value, the steel is considered to have the bending condition.
2. The steel product shape measurement linearity detecting and correcting method according to claim 1, wherein if said maximum vertical distance is larger than a detection standard value, dividing said steel product into two sections of sub-steel products with a rib valley midpoint corresponding to said maximum vertical distance as a boundary point, and performing straight line fitting again on the rib valley midpoints on the two sections of sub-steel products, respectively;
and calculating the vertical distance from the center point of the rib valley of the two sections of sub-steel materials to the corresponding fitting straight line, and if the vertical distance greater than the detection standard value still exists, determining that the linearity of the steel material is unqualified.
3. The method for detecting and correcting the linearity of measurement of the external shape of a steel material according to claim 1 or 2, wherein the vertical distance is calculated in step S3 by
Wherein A, B, C is the coefficient of the fitted straight line equation in step S2, x0Is the abscissa of the midpoint of the rib valley, y0The ordinate of the midpoint of the rib valley.
4. The method for detecting and correcting the linearity of the measurement of the external shape of the steel material according to claim 1, wherein a pair of displacement sensors are disposed on both sides of the cross section of the steel material to be measured and scan along the length direction of the steel material to be measured, and the data collected by either displacement sensor does not satisfy the standard value requirement for the measurement, and the linearity of the steel material is considered to be unsatisfactory.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112634287A (en) * | 2020-12-25 | 2021-04-09 | 电子科技大学 | Heart magnetic resonance image segmentation method based on interlayer offset correction |
| CN113843308A (en) * | 2021-08-25 | 2021-12-28 | 北京科技大学 | Pressure straightening strategy method for metal section |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034112A (en) * | 1989-05-31 | 1991-01-10 | Mitsubishi Heavy Ind Ltd | Method and device for measuring straightness shape |
| CN103743359A (en) * | 2013-12-24 | 2014-04-23 | 山西平阳重工机械有限责任公司 | External thread coaxiality error measuring method |
| CN103955927A (en) * | 2014-04-26 | 2014-07-30 | 江南大学 | Fillet weld automatic tracking method based on laser vision |
| CN105157611A (en) * | 2015-09-30 | 2015-12-16 | 广州超音速自动化科技股份有限公司 | Visual detection method of pipe thread |
| CN106272069A (en) * | 2015-06-11 | 2017-01-04 | 徐工集团工程机械股份有限公司 | The circularity of a kind of external cylindrical surface grinding and linearity testing apparatus and detection method |
| CN106503649A (en) * | 2016-10-20 | 2017-03-15 | 北京工业大学 | A kind of short-wave signal detection recognition method based on computer vision |
| CN206772243U (en) * | 2016-11-23 | 2017-12-19 | 武汉利德测控技术有限公司 | A kind of device of dynamic measurement end of rail linearity |
| CN107702666A (en) * | 2017-08-30 | 2018-02-16 | 北京航天控制仪器研究所 | A kind of screw thread and the measuring method of reference axis axiality |
-
2019
- 2019-10-31 CN CN201911051127.5A patent/CN110631541B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034112A (en) * | 1989-05-31 | 1991-01-10 | Mitsubishi Heavy Ind Ltd | Method and device for measuring straightness shape |
| CN103743359A (en) * | 2013-12-24 | 2014-04-23 | 山西平阳重工机械有限责任公司 | External thread coaxiality error measuring method |
| CN103955927A (en) * | 2014-04-26 | 2014-07-30 | 江南大学 | Fillet weld automatic tracking method based on laser vision |
| CN106272069A (en) * | 2015-06-11 | 2017-01-04 | 徐工集团工程机械股份有限公司 | The circularity of a kind of external cylindrical surface grinding and linearity testing apparatus and detection method |
| CN105157611A (en) * | 2015-09-30 | 2015-12-16 | 广州超音速自动化科技股份有限公司 | Visual detection method of pipe thread |
| CN106503649A (en) * | 2016-10-20 | 2017-03-15 | 北京工业大学 | A kind of short-wave signal detection recognition method based on computer vision |
| CN206772243U (en) * | 2016-11-23 | 2017-12-19 | 武汉利德测控技术有限公司 | A kind of device of dynamic measurement end of rail linearity |
| CN107702666A (en) * | 2017-08-30 | 2018-02-16 | 北京航天控制仪器研究所 | A kind of screw thread and the measuring method of reference axis axiality |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112634287A (en) * | 2020-12-25 | 2021-04-09 | 电子科技大学 | Heart magnetic resonance image segmentation method based on interlayer offset correction |
| CN113843308A (en) * | 2021-08-25 | 2021-12-28 | 北京科技大学 | Pressure straightening strategy method for metal section |
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