JPS6250016A - Measuring device for rolling length - Google Patents

Abstract

PURPOSE:To improve an accuracy of measuring a length by detecting an existence of a material to be rolled stopped by pressing a stopper, and by detecting the rear end of a rolling mill with an image sensor based on a signal from a pulse generator equipped on a roll shaft. CONSTITUTION:The material 8 to be rolled is stopped by pressing the stopper 9 equipped downstream the finishing mill 2. Then, the existence of the material 8 to be rolled is detected by hot ingot detectors 5-7. Moreover, the rough full length is obtained by an arithmetic operation with a length measuring circuit 17. This rough full length is transferred to the movement distance arithmetic circuit 18a of the image sensor 15, and the arithmetic operation is performed by an equation based on the movement distance of the image sensor 15. In this way, by measuring the rear end shape part of the material to be rolled on stationary state, the accuracy of the length measurment is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rolling length measuring device for measuring the total length of a rolled material on the downstream side of a finishing rolling mill.

[Technical background of the invention and its problems]

The prior art will be explained with reference to FIGS. 3 and 4. FIG. 3 shows the configuration of the length measuring device. That is, the length measuring device includes transport tables 1 and 4 that convey the material to be rolled 8, a mechanical stopper 9 that presses the tip of the material to be rolled to stop it, and a pulse generator that detects the rotation speed of the main roll of the finishing mill 2. It consists of a device 3 and thermal mass detectors 5 to 7. Figure 4 shows length measurement circuit 1
7 is shown.

In this figure, a counter circuit 17 counts pulses while the tip of the pressurized abrasive 8 passes through the hot mass detectors 6 to 7.
a, its pulse count value, and the distance between the thermal mass detectors 6 and 7! , and the increment calculation circuit 17b that calculates the distance per pulse from .
From the time when the tail end of the rolled material 8 is
The total length of the material to be rolled 8 can be determined by adding the counter circuit 17c that counts the pulses until OF "F" and the distance between the hot lump detectors 5 and 6 multiplied by an increment to the count value of this circuit 17c. Length measurement calculation circuit 17d for calculating
It is equipped with That is, the material to be rolled 8 is transferred to the input conveyance table I.
The material to be rolled 8 is conveyed by E and passes through the finishing mill 2.
When the tip reaches the position of the thermal mass detector 6, the thermal mass detector 6
turns "ON" and the detection signal is applied to the counter circuit 17a of the length measuring circuit 17 (2) At the same time, pulses from the pulse generator 3 are input and pulse counting starts. When reaching the position of the lump detector 7, the hot lump detector 7 turns ON and this detection signal stops the pulse counting in the counter circuit 17a. N6-7 is the distance between the hot mass detectors 6 and 7, and is the number of pulses in the distance, and the distance 11. per pulse is calculated by the increment calculation circuit 17b using the following formula.

Here, engraving; distance between thermal mass detectors 6 and 7, a < try
s>Na-t ; Pulse count value (p) in the counter circuit 17a On the other hand, when the tip of the material to be rolled 8 turns on the hot lump detector 7, another counter circuit 17c starts pulse counting and The tail end of the rolled material 8 passes through the position of the hot lump detector 5, and the counter circuit 1 is activated by the ``OFF'' signal of the hot lump detector 5.
The nox count at 7c stops. Next, the above (1
) calculation circuit 17d (calculates the total length 2 of the material 8 to be rolled by the following formula from the length per nocils on the right side calculated by the formula and the pulse count value N calculated by the counter circuit 17C) do.

,g=I,,X N? + (p, + -eb)
"--・12) Here, the total length of the rolled material 8 (a) N,; the pulse count value in the counter circuit 17c (p
) 21; Distance (hidden) between hot mass detectors 5 and 6 The length measurement is completed by outputting the total length of the rolled material 8 obtained by the above equation (2) to the outside, but with this length measurement method, There was a drawback that errors due to variations in the shape of the leading and trailing ends of the material to be rolled 8, the temperature, and the speeds of the finishing mill 2 and the conveying table 1.4 could not be eliminated.

[Purpose of the invention]

The present invention was made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a rolling length measuring device that can measure the entire length of a rolled material with high accuracy regardless of the shape of the leading and trailing ends, temperature, speed, etc. [Summary of the Invention] The present invention provides an image sensor for image processing the leading and trailing ends of the rolled material downstream of a finishing mill and its drive for determining the rough overall length of the rolled material. This is a rolling length length measuring device that is equipped with a device and corrects the rough total length of the wave pressure extension described above using image-processed length data via this image sensor to accurately determine the total length of the rolled material. Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a rolling length measuring device of the present invention, in which an image sensor 15 for capturing an image of the rear end shape of a material to be rolled 8 is mounted on the conventional configuration shown in FIG. This truck 11 has a mechanism (guide rail 10 and truck 11) added to the rear end of the material 8 to move it toward the machine stopper 9 or toward the exit side of the finishing rolling mill 2. A detector 13 and a position detector 14 for detecting the position of the truck 11 are provided. The travel distance of the distance hole and the carriage is determined by the maximum length and minimum length of the material 8 to be rolled. Note that the drive system for the trolley 11 may be a mechanical system (for example, a hydraulic system) other than an electric system.

FIG. 2 is a block diagram showing the control configuration of the present invention, including a moving distance calculating circuit 18a that calculates and outputs the moving distance for moving the cart 11 with respect to the electric motor 12 based on the length measurement result of the length measuring circuit 17; An image processing calculation circuit 18c and a cart 1 image the rear end shape of the rolled material 8 in a stationary state using an image sensor 15 and calculate the length in the longitudinal direction of the rear end shape.
The rolling length measuring device 18 is comprised of a rolling length calculating circuit 18b which corrects the length in the longitudinal direction of the rear end shape to the current position of 1 and calculates the total length of the rolled material 8.Next, its operation is explained in detail. I will explain.

First, the rough overall length of the material to be rolled is measured using the aforementioned length measuring circuit 17 (
Hals oscillator 3 and counter circuit 17a.

17c, an increment calculation circuit 17b, and a length measurement calculation circuit 17d), and transfers this total length form to the movement distance calculation circuit 18a of the next image sensor, and calculates the position reference J3'2 of the image sensor using the following formula. Note that the length measuring circuit 17 is the same as the conventional one shown in FIG.

2'2=Sho-yama (rItri...)
(3) Here, p: Total length of the rolled material 8 (in order) A, ; M Fixed distance from the mechanical stopper 9 position to the most downstream position of the image sensor (I) (3S: (Me-9-e) y f -15c movement M distance 1
iF, (:m) The position signal of the position detector 14 that detects the position of the truck 1 with the moving distance p2 of the image sensor 15 determined by the above equation 5(3) as a position reference and the drive control device 16 The output of this device j6 drives the electric motor 12 to move the cart 11 and perform position control. In this way, when the cart 11 reaches the image sensor - moving distance -e4, the output of the drive control device 16 is stopped and the cart 11 is stopped.
When the movement of the carriage 11 is completed, the material 8 to be rolled has already been conveyed by the exit side conveyance table 4 of the finishing rolling mill 2, and is pressed against the mechanical stopper 9 and is stationary. In this state, the rear end shape portion of the rolled material 8 is imaged by the image sensor from the position of the image sensor 15, that is, from the position of the image sensor moving distance, and the image signal is inputted to the image processing calculation circuit 18c. In step 18c, the length of the rear end shape of the material to be rolled 8 in the longitudinal direction, 10 BOT, is determined using the position of the image sensor-travel distance type '2 as the reference position of the image, and this is transferred to the next rolling length calculation circuit 18b. At the same time, trolley 11
The current position of 2. is detected again by the position detector 14 and this position detection signal 2. is input to the circuit 18h, and the accurate total length of the rolled material 8 is calculated using the following formula.

L=4. +, 6. ±13sor (”-) ・・”・
-・(4) Here, fixed distance CM from the mechanical stopper 9 position to the most downstream position of the image sensor>Huh; Distance traveled by one sensor and the cart 11 at the time of image capture by the image sensor 15 (parrot) Top shape,. T: Length in the longitudinal direction of the rear end shape of the rolled material 8 #
11) The length measurement calculation is completed by outputting the accurate total length of the rolled material 8 determined by the equation (4), and the same process as described above is repeated for each next rolled material.

[Other Examples]

Note that the above explanation is for the case where the mechanical stopper 9 is installed, and even in equipment where the mechanical stopper 9 is not provided and the tip position of the rolled material 8 is not fixed, an image sensor that images the tip shape is used.
If the image processing calculation circuit and the image processing circuit are installed in the flattened length measuring device 18, the tip reference position may be corrected and the same operation as described above may be performed. Furthermore, instead of using the above-mentioned movable image sensor, multiple fixed image sensors can be installed by switching the imaging position of the image sensor according to the total length of the rolled material 8. [Effects of the Invention] As detailed above, in the present invention, the total length of the rolled material is determined by the conventional method, and the image sensor is determined from that value. Calculate the moving distance of the cart on which it is placed, constrain the position of the cart with this moving distance, take an image of the rear end shape of the rolled material in a stationary state using an image sensor from that position, perform image processing calculations, and calculate this. Mechanical stopper to sensor truck 11
shape of the leading and trailing ends of the rolled material to correct the length up to the current value.

It is possible to provide a rolled length measuring device that can measure length with very high accuracy without being affected by fluctuation errors such as temperature and speed.

[Brief explanation of drawings]

The first factor is a schematic configuration diagram according to an embodiment of the present invention, the second factor is a control configuration diagram of the present invention, and FIGS. 3 and 4 are conventional schematic configuration diagrams and control configuration diagrams. l... Inlet conveyance table 2... Finishing rolling mill 3... Pulse transmitter 4... Outlet conveyance tables 5 to 7... Ripe block detector 8... Rolled material 9...・Mechanical stopper 10...Guide rail 11...Sensor cart 12...Electric knowledge P1 Night 13...Speed detector 14...Position detector 15...Image sensor 16... Drive control device 17...Conventional length measuring circuit 8...Compression length measuring device 18a...Movement distance calculating circuit 18b in the compacting length measuring device I8...Compilation length measuring device Compilation length calculation circuit 18c in 18...Image processing calculation circuit in the compression length measuring device t8 Agent Patent attorney Noriyuki Chika Hirofumi Mitsumata Figure 1/d Figure 2 Figure 3 Figure 17b: In 7'/Mentone moxibustion JL mouth passage 11d;

Claims (3)

[Claims] (1) Rolling length measurement that measures the length of the rolled material by pressing the rolled material in the finishing rolling mill against a mechanical stopper installed downstream of the finishing rolling mill and stopping it. a length measuring circuit comprising a hot lump detector for detecting the presence or absence of the rolled material downstream of the finishing rolling mill and a pulse transmitter provided on a roll shaft of the finishing rolling mill; An image sensor with a movable drive mechanism is provided at a position corresponding to the rear end of the material and detects the shape of the material to be rolled, and the position of this image sensor is determined based on the calculated value obtained by the length measuring circuit. It is characterized by comprising a calculation device that is positioned at a rear end position, calculates the length from that position to the rear end of the rolled material using the image sensor, and corrects the length measurement result of the length measurement circuit. A length measurement device for pressure and length. (2) The rolling length measuring device according to claim 1, wherein the image sensor is not equipped with a drive mechanism, but is provided with a plurality of units. (3) In a rolling length length measuring device that measures the length of a rolled material rolled in a finishing rolling mill, a hot lump detector that detects the presence or absence of the rolled material downstream of the finishing rolling mill; A length measurement circuit consisting of a pulse transmitter provided on the roll shaft of the finishing rolling mill, and a movable drive mechanism provided at a position corresponding to the rear end of the material to be rolled to detect the shape of the rear end of the material to be rolled. a first image sensor that detects the tip shape of the rolled material; and a second image sensor that detects the tip shape of the rolled material; The first image sensor calculates the length from the rear end position to the rear end of the rolled material, and the length measuring circuit calculates the length from the rear end position to the rear end of the rolled material using the first image sensor. A computation device for correcting a length measurement result.