CN113063382A - Novel steel pipe length measuring method - Google Patents
Novel steel pipe length measuring method Download PDFInfo
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- CN113063382A CN113063382A CN202110290354.4A CN202110290354A CN113063382A CN 113063382 A CN113063382 A CN 113063382A CN 202110290354 A CN202110290354 A CN 202110290354A CN 113063382 A CN113063382 A CN 113063382A
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- steel pipe
- length
- conveying roller
- roller way
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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
- G01B21/02—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 length, width, or thickness
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Abstract
The invention discloses a novel steel pipe length measuring method, which adopts an indirect measuring mode, the length of a steel pipe is indirectly measured by measuring the distance between two end faces of the steel pipe and respective reference points, two moving platforms are respectively arranged at two ends of the steel pipe, the initial position is zero, the distance is L, then an editor is moved to the walking distance (L1, L2) of the end of each steel pipe, L-L1-L2 is the length of the steel pipe, in addition, a double-inductive switch mode is also adopted, namely, the first inductive switch plays a role in speed reduction, and the latter inductive switch is used for detecting whether the steel pipe exists or not, the method is convenient to operate, the measuring precision is within +/-10 mm, and the repetition precision is less than or equal to 5 mm. According to the novel steel pipe length measuring method, the length of the steel pipe is obtained by combining the position code with the position sensing switch, various complex sensors and mechanical structures of the existing length measuring mechanism are avoided, and the detection precision is improved; the situation that optical instruments like laser length measurement, grating ruler length measurement and the like are easy to interfere with severe environment on site is avoided.
Description
Technical Field
The invention relates to the technical field of mechanical automation, in particular to a novel steel pipe length measuring method.
Background
According to different technological requirements of manufacturers, the steel pipe length measuring system has various length measuring methods. The following are mainly available:
1. the grating ruler is used for measuring the length, and the basic principle is as follows: two grating rulers with fixed lengths are respectively arranged on the outer sides of two ends of the steel pipe, a rodless cylinder is utilized to drive the grating rulers to be close to the two ends of the steel pipe, and the measurement of the length of the steel pipe is realized by utilizing the interference phenomenon of light. The method has the characteristics of high accuracy, but the grating ruler is expensive and difficult to maintain, and is sensitive to the influence of dust and field vibration.
2. The length measurement by the camera is realized by utilizing image processing, the principle is that a series of equidistant photoelectric switches are arranged on one section of a steel pipe conveying roller way, a light source and the camera are added on the other section, and when the steel pipe passes through the area, the length of the steel pipe can be determined according to the position of an image shot by the camera on a screen at one position of the photoelectric switch. The method is characterized in that online measurement can be realized, and length data can be obtained when the steel pipe passes through a length measurement area without intervals. The disadvantages are that: if the special light source is not used for irradiation, the steel pipe is interfered by external light, and after the special light source is adopted, the reflection of light is strong due to the fact that the brightness of the end of the steel pipe is high after chamfering, and reading errors are easily caused.
3. The encoder measures the length, and the principle is: the encoder is arranged at the oil cylinder, the oil cylinder is used for pushing the steel pipe to move on the roller way, a series of photoelectric switches are arranged on the other side of the oil cylinder at equal intervals, and when the end of the steel pipe pushed by the oil cylinder touches the photoelectric switches, the recorded reading of the encoder is converted into the stroke of the oil cylinder, so that the length of the steel pipe can be calculated. It is characterized in that the steel pipe needs to be lifted up when measuring the length. In addition, the photoelectric switch detection has certain errors, and sufficient measurement is required.
In order to overcome the defects of the measuring methods, the invention provides a novel steel pipe length measuring method.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a novel steel pipe length measuring method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel steel pipe length measuring method comprises a steel pipe conveying roller way, wherein a measuring sensor for detecting a steel pipe on the steel pipe conveying roller way is arranged on one side of the steel pipe conveying roller way, a moving track is arranged on the side surface of the steel pipe conveying roller way in parallel, and two moving platforms of the moving track are respectively provided with a position sensing switch; the measuring method comprises the following steps:
s1, acquiring the distance L between the two position sensing switches at the initial reference point;
s2, stopping the steel pipe conveying roller way after the position of the steel pipe is sensed by the measuring sensor, and keeping the steel pipe static;
s3, the two moving platforms move relatively, when the position sensing switch detects a steel pipe, the rising edge of a signal is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the falling edge of the signal is taken, the position coordinate of the position code is read and recorded, and L1 and L2 are obtained respectively;
and S4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform to the original datum point position, and conveying the steel pipe to the next procedure.
Preferably, two sections of moving tracks are arranged in parallel with the steel pipe conveying roller way, and each moving track is provided with a first induction switch and a second induction switch respectively, and the measuring method comprises the following steps:
s1, acquiring a distance L between the two first inductive switches located at the initial reference point;
s2, stopping the steel pipe conveying roller way after the position of the steel pipe is sensed by the measuring sensor, and keeping the steel pipe static;
s3, the four moving platforms move relatively, when the two second inductive switches detect the steel pipe, the moving speed of the moving platforms is reduced, when the first inductive switches detect the steel pipe, the signal rising edge is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the signal falling edge is taken, the position coordinate of the position code is read, and the position coordinate of the position code is recorded, so that L1 and L2 are obtained respectively;
and S4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform to the original datum point position, and conveying the steel pipe to the next procedure.
The invention has the following beneficial effects:
1. the novel steel pipe length measuring method provided by the invention adopts an indirect measuring mode, the length of the steel pipe is indirectly measured by measuring the distance between two end surfaces of the steel pipe and respective reference points, two movable platforms are respectively arranged at two ends of the steel pipe, the initial position is zero, the distance is L, then the length of an editor is moved to the walking distance (L1, L2) of the end of each steel pipe, L-L1-L2 are the length of the steel pipe, and the measuring mode overcomes the difficulties that the steel pipe is huge in size, the environment of a production site is complex, a measuring mechanism cannot penetrate through a support rack at the lower part of the steel pipe and the like.
2. The novel steel pipe length measuring method provided by the invention adopts a double-inductive switch mode, namely, the first inductive switch plays a role in speed reduction, and the latter inductive switch is used for detecting whether the steel pipe exists or not, the method is convenient to operate, the measuring precision is within +/-10 mm, and the repetition precision is less than or equal to 5 mm.
3. According to the novel steel pipe length measuring method provided by the invention, the length of the steel pipe is obtained by combining the position code with the position inductive switch, so that various complex sensors and mechanical structures of the existing length measuring mechanism are avoided, the detection precision is improved, and the precision can reach +/-0.1 cm; the situation that optical instruments like laser length measurement, industrial camera length measurement, grating ruler length measurement and the like are easy to interfere with severe environment on site is avoided.
Drawings
FIG. 1 is a schematic diagram illustrating the implementation of a first embodiment of a novel method for measuring the length of a steel pipe according to the present invention;
fig. 2 is a schematic diagram illustrating the implementation of a second embodiment of the novel steel tube length measuring method according to the present invention.
In the figure: the device comprises a steel pipe conveying roller way 1, a measuring sensor 2, a moving track 3, a moving platform 4, a position inductive switch 5, a first inductive switch 6 and a second inductive switch 7.
Detailed Description
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1, a novel steel pipe length measuring method comprises a steel pipe conveying roller way 1, wherein a measuring sensor 2 for detecting a steel pipe on the steel pipe conveying roller way 1 is arranged on one side of the steel pipe conveying roller way 1, a moving track 3 is arranged on the side surface of the steel pipe conveying roller way 1 in parallel, and two moving platforms 4 of the moving track 3 are respectively provided with a position sensing switch 5; the measuring method comprises the following steps:
s1, acquiring the distance L between the two position sensing switches 5 at the initial reference point;
s2, after the position of the steel pipe is sensed by the measuring sensor 2, stopping the operation of the steel pipe conveying roller way 1 to keep the steel pipe static;
s3, the two moving platforms 4 move relatively, when the position sensing switch 5 detects a steel pipe, the signal rising edge is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the signal falling edge is taken, the position coordinate of the position code is read, and the position coordinate of the position code is recorded, so that L1 and L2 are obtained respectively;
s4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform 4 to the original datum point position, and conveying the steel pipe to the next procedure.
In the embodiment, the two ends of the steel pipe are respectively provided with the movable platforms 4, the initial position is zero, the distance is L, then the length of the editor is moved to the walking distance (L1 and L2) of the pipe end of each steel pipe, and L-L1-L2, namely the length of each steel pipe, is calculated, and the measuring method overcomes the difficulties that the steel pipes are large in size, the production field environment is complex, a measuring mechanism cannot penetrate through a support rack at the lower part of each steel pipe and the like.
Example 2
Referring to fig. 2, different from embodiment 1, two moving tracks 3 are arranged in parallel with a steel pipe conveying roller way 1, each moving track 3 is provided with a first inductive switch 6 and a second inductive switch 7, and the measuring method includes the following steps:
s1, acquiring the distance L between the two first inductive switches 6 at the initial reference point;
s2, after the position of the steel pipe is sensed by the measuring sensor 2, stopping the work of the steel pipe conveying roller way 1 to keep the steel pipe static;
s3, the four moving platforms 4 move relatively, when the two second inductive switches 7 detect the steel pipe, the moving speed of the moving platforms 4 is reduced, when the first inductive switch 6 detects the steel pipe, the signal rising edge is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the signal falling edge is taken, the position coordinate of the position code is read, and the position coordinate of the position code is recorded, so that L1 and L2 are obtained respectively;
s4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform 4 to the original datum point position, and conveying the steel pipe to the next procedure.
In the embodiment, a double-induction switch mode is adopted, namely the first induction switch plays a role in speed reduction, and the latter induction switch is used for detecting whether the steel pipe exists or not, the method is convenient to operate, the measurement precision is within +/-10 mm, and the repetition precision is less than or equal to 5 mm.
The working principle is as follows: stopping the steel pipe after reaching the length measuring position, enabling the position induction switch 5 to sweep the steel pipe along the axial direction of the steel pipe, when the steel pipe is detected, taking the rising edge of a signal, reading the position coordinate of a position code, when the steel pipe is not detected, taking the falling edge of the signal, reading the position coordinate of the position code, and subtracting the two coordinate values to obtain the length of the steel pipe;
if the length value of the steel pipe is high, double detection switches are adopted for detection, the double detection switches are placed in tandem, after the former detection switch detects the steel pipe, the moving mechanism is decelerated, after the latter detection switch detects the steel pipe, the steel pipe is accelerated, the tail part of the steel pipe is enabled, after the former detection switch cannot detect the steel pipe, the moving mechanism is decelerated again, after the latter detection switch detects that the steel pipe disappears and falls along, the PLC is informed of the value, and the resetting is started.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. A novel steel pipe length measuring method comprises a steel pipe conveying roller way (1) and is characterized in that: a measuring sensor (2) for detecting steel pipes on the steel pipe conveying roller way (1) is arranged on one side of the steel pipe conveying roller way (1), a moving track (3) is arranged on the side surface of the steel pipe conveying roller way (1) in parallel, and two moving platforms (4) of the moving track (3) are respectively provided with a position sensing switch (5); the measuring method comprises the following steps:
s1, acquiring the distance L between the two position sensing switches at the initial reference point;
s2, stopping the steel pipe conveying roller way after the position of the steel pipe is sensed by the measuring sensor, and keeping the steel pipe static;
s3, the two moving platforms move relatively, when the position sensing switch detects a steel pipe, the rising edge of a signal is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the falling edge of the signal is taken, the position coordinate of the position code is read and recorded, and L1 and L2 are obtained respectively;
and S4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform to the original datum point position, and conveying the steel pipe to the next procedure.
2. The novel steel pipe length measuring method according to claim 1, characterized in that: two sections of moving tracks (3) are arranged in parallel with the steel pipe conveying roller way (1), each moving track (3) is provided with a first induction switch (6) and a second induction switch (7), and the measuring method comprises the following steps:
s1, acquiring a distance L between the two first inductive switches located at the initial reference point;
s2, stopping the steel pipe conveying roller way after the position of the steel pipe is sensed by the measuring sensor, and keeping the steel pipe static;
s3, the four moving platforms move relatively, when the two second inductive switches detect the steel pipe, the moving speed of the moving platforms is reduced, when the first inductive switches detect the steel pipe, the signal rising edge is taken, the position coordinate of the position code is read, when the steel pipe cannot be detected, the signal falling edge is taken, the position coordinate of the position code is read, and the position coordinate of the position code is recorded, so that L1 and L2 are obtained respectively;
and S4, calculating L-L1-L2 to obtain the length of the steel pipe, resetting the mobile platform to the original datum point position, and conveying the steel pipe to the next procedure.
Priority Applications (1)
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| CN202110290354.4A CN113063382A (en) | 2021-03-18 | 2021-03-18 | Novel steel pipe length measuring method |
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| CN202110290354.4A CN113063382A (en) | 2021-03-18 | 2021-03-18 | Novel steel pipe length measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548357A (en) * | 2021-07-28 | 2021-10-26 | 国网江苏省电力有限公司物资分公司 | Automatic vertical storage mode of power cable protection pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845507A (en) * | 1981-09-11 | 1983-03-16 | Nippon Kokan Kk <Nkk> | Length detecting device for steel pipe |
| CN201828807U (en) * | 2010-09-15 | 2011-05-11 | 临汾市科利测控技术有限公司 | Automatic control device for steel pipe weighing, length measurement and identification |
| CN202372145U (en) * | 2011-12-20 | 2012-08-08 | 中国兵器工业第二〇二研究所 | Photoelectric opposite-type bidirectional length measuring apparatus |
| CN111023981A (en) * | 2019-12-30 | 2020-04-17 | 芜湖哈特机器人产业技术研究院有限公司 | Large cylindrical workpiece parameter measuring device and method |
| CN112284316A (en) * | 2020-10-22 | 2021-01-29 | 广州文冲船厂有限责任公司 | Method and device for measuring length of steel pipe |
| CN212623084U (en) * | 2020-04-03 | 2021-02-26 | 华中科技大学无锡研究院 | Steel pipe length measuring and weighing system |
-
2021
- 2021-03-18 CN CN202110290354.4A patent/CN113063382A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845507A (en) * | 1981-09-11 | 1983-03-16 | Nippon Kokan Kk <Nkk> | Length detecting device for steel pipe |
| CN201828807U (en) * | 2010-09-15 | 2011-05-11 | 临汾市科利测控技术有限公司 | Automatic control device for steel pipe weighing, length measurement and identification |
| CN202372145U (en) * | 2011-12-20 | 2012-08-08 | 中国兵器工业第二〇二研究所 | Photoelectric opposite-type bidirectional length measuring apparatus |
| CN111023981A (en) * | 2019-12-30 | 2020-04-17 | 芜湖哈特机器人产业技术研究院有限公司 | Large cylindrical workpiece parameter measuring device and method |
| CN212623084U (en) * | 2020-04-03 | 2021-02-26 | 华中科技大学无锡研究院 | Steel pipe length measuring and weighing system |
| CN112284316A (en) * | 2020-10-22 | 2021-01-29 | 广州文冲船厂有限责任公司 | Method and device for measuring length of steel pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548357A (en) * | 2021-07-28 | 2021-10-26 | 国网江苏省电力有限公司物资分公司 | Automatic vertical storage mode of power cable protection pipe |
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Application publication date: 20210702 |