CN111693002A

CN111693002A - Method for detecting position of strip head of steel coil

Info

Publication number: CN111693002A
Application number: CN202010463505.7A
Authority: CN
Inventors: 谢兆威; 冯伟
Original assignee: Baosteel Engineering and Technology Group Co Ltd
Current assignee: Baosteel Engineering and Technology Group Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-09-22

Abstract

The invention relates to the field of metering equipment characterized by adopting an optical method, in particular to a method for detecting the position of a steel coil strip head. A method for detecting the position of a steel coil head is characterized by comprising the following steps: the method is implemented in sequence according to the following steps: firstly, installation; detecting; thirdly, calculating; and fourthly, positioning. The invention has accurate detection and high production efficiency.

Description

Method for detecting position of strip head of steel coil

Technical Field

The invention relates to the field of metering equipment characterized by adopting an optical method, in particular to a method for detecting the position of a steel coil strip head.

Background

At present, along with the needs that the intelligent degree of smelting plant promoted, need improve the degree of automation of each process, this wherein, the detection of coil of strip head is a difficult point, because the strip head form is changeable, and environmental constraint has to adopt the manual work to detect the operation again, has reduced production efficiency, has the potential safety hazard again.

Disclosure of Invention

The invention discloses a method for detecting the position of a steel coil strip head, which aims to overcome the defects of the prior art and provide a detection means with accurate detection and improved production efficiency.

The invention achieves the purpose by the following technical scheme:

a method for detecting the position of a steel coil head is characterized by comprising the following steps: the method is implemented in sequence according to the following steps:

installing: a rotating shaft is rotatably arranged at the center of the inner ring of the steel coil, a displacement sensor is fixed on the rotating shaft, and the displacement sensor is connected with a controller through a signal wire;

detection: the rotating shaft drives the displacement sensor to rotate in the inner ring of the steel coil, and the displacement sensor detects the distance from the displacement sensor to the inner ring of the steel coil in real time and transmits distance data to the controller while rotating;

③ calculation, the displacement sensor is set to T in turn in each scanning period₁、T₂、……T_n-1、T_nAnd is arranged at T_nThe distance between the displacement sensor and the inner ring of the steel coil detected in the period is H_nThe controller determines the distance difference △ H = | H between two adjacent scanning periods_n-H_n-1|；

④ is positioned when △ H is not more than a stable value H₀When the steel coil is in a continuous surface state, the controller judges that the inner ring of the steel coil is a continuous surface at the moment, and when △ H is larger than a stable value H₀And the controller judges that the inner ring of the steel coil is a discontinuous surface at the moment, namely the position of the strip head.

The detection method of the position of the head of the steel coil is characterized by comprising the following steps: firstly, the detection precision of displacement sensors is not lower than 0.001mm, the number of the displacement sensors is not less than three, and the displacement sensors are sequentially fixed on a rotating shaft and evenly distributed around the central axis of the rotating shaft;

the displacement sensors respectively detect the tape head positions, and when more than two displacement sensors detect the tape head signals at a certain position, the position is judged as the tape head position;

the controller is a microcomputer or a programmable controller;

and step three, the scanning period is not longer than 5ms, and the stable value is 0.000-0.090 mm.

The invention selects a high-precision displacement sensor to scan the inner ring of the steel coil and transmits the measured distance to the controller for processing. The data processing principle is as follows: 1. when in the continuous strip position, the detected position data is continuously smooth; 2. when the tape head is scanned, the position data may be abruptly changed.

The invention can also be applied to the confirmation of the position of the belt head of the outer ring of the steel coil.

The invention has the following beneficial effects: the detection is accurate, and the production efficiency is improved.

Drawings

Figure 1 is a schematic view of the structure of the present invention,

fig. 2 is a schematic diagram of distance data detected by a displacement sensor when the present invention is in use.

Detailed Description

The invention is further illustrated by the following specific examples.

Example 1

A method for detecting the position of the head of a steel coil strip is implemented according to the following steps in sequence:

installing: as shown in fig. 1: a rotating shaft 2 is rotatably arranged at the center of the inner ring of the steel coil 1, a displacement sensor 3 is fixed on the rotating shaft 2, and the displacement sensor 3 is connected with a controller 4 through a signal line;

the detection precision of the displacement sensors 3 is not lower than 0.001mm, the number of the displacement sensors 3 is not less than three, and each displacement sensor 3 is sequentially fixed on the rotating shaft 2 and evenly distributed around the central axis of the rotating shaft 2;

the controller 4 is a microcomputer or a programmable controller;

detection: the rotating shaft 2 drives the displacement sensor 3 to rotate in the inner ring of the steel coil 1, and the displacement sensor 3 detects the distance from the displacement sensor 3 to the inner ring of the steel coil 1 in real time while rotating, namely, scans a detection surface S shown in figure 1 and transmits distance data to the controller 4;

③ calculation, the displacement sensor 3 is set to T in turn for each scanning period₁、T₂、……T_n-1、T_nAnd is arranged at T_nThe distance from the displacement sensor 3 to the inner ring of the steel coil 1 detected in the period is Hn, and the controller 4 obtains the distance difference △ H = | H that can be detected in two adjacent scanning periods_n-H_n-1|；

The scanning period is not longer than 5ms, and the stable value is 0.000 mm-0.090 mm;

④ is positioned, as shown in FIG. 2, when △ H is not greater than a stable value H₀When the steel coil 1 is in a continuous surface state, the controller 4 judges that the inner ring of the steel coil 1 is in a continuous surface state, and when △ H is larger than a stable value H₀Meanwhile, the controller 4 determines that the inner ring of the steel coil 1 at this time is a discontinuous surface, i.e., the position of the tape head 11 is shown as a in fig. 2;

the plurality of displacement sensors 3 detect the tape head positions, respectively, and when two or more displacement sensors 3 detect a tape head signal at a certain position, the position is determined as the tape head position.

Notes in the use of the present embodiment:

1. selecting a displacement sensor with high precision and high scanning period;

2. a plurality of displacement sensors are adopted for detection, and external adverse factors are filtered;

3. the delta H can be difference data of adjacent periods or difference data of a plurality of periods, and is adjusted according to actual conditions until the best identification effect is achieved.

Claims

1. A method for detecting the position of a steel coil head is characterized by comprising the following steps: the method is implemented in sequence according to the following steps:

installing: a rotating shaft (2) is rotatably arranged at the center of the inner ring of the steel coil (1), a displacement sensor (3) is fixed on the rotating shaft (2), and the displacement sensor (3) is connected with a controller (4) through a signal line;

detection: the rotating shaft (2) drives the displacement sensor (3) to rotate in the inner ring of the steel coil (1), and the displacement sensor (3) detects the distance from the displacement sensor (3) to the inner ring of the steel coil (1) in real time and transmits distance data to the controller (4) while rotating;

calculating: setting T1, T2, … … Tn-1 and Tn in each scanning period of the displacement sensor (3) in sequence, setting the distance from the displacement sensor (3) to the inner ring of the steel coil (1) detected in the Tn period as Hn, and solving the distance difference delta H = | Hn-Hn-1| from the energy-saving side of two adjacent scanning periods by the controller (4);

positioning: and when the delta H is not more than the stable value H0, the controller (4) judges that the inner circle of the steel coil (1) is a continuous surface at the moment, and when the delta H is more than the stable value H0, the controller (4) judges that the inner circle of the steel coil (1) is a discontinuous surface at the moment, namely the position of the tape head (11).

2. The method for detecting the position of the head of the steel coil strip as claimed in claim 1, wherein: firstly, the detection precision of the displacement sensors (3) is not lower than 0.001mm, the number of the displacement sensors (3) is not less than three, and the displacement sensors (3) are sequentially fixed on the rotating shaft (2) and evenly distributed around the central axis of the rotating shaft (2);

the controller (4) is a microcomputer or a programmable controller;