JPH067004U - Catenary loop amount detector - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a device for detecting the amount of catenary loop which can detect the amount of catenary loop with high accuracy. [Structure] A plurality of laser eclipsometers are installed to detect a catenary loop amount, and an average value of each detected value is used as a feedback signal for controlling the catenary loop amount. [Effect] The amount of catenary loop can be detected with high accuracy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for detecting the amount of catenary loop in a steel process line or the like.

[0002]

[Prior art]

 Generally, in a steel process line (plating line, coating line, etc.), a catenary loop occurs between the rolls when the rolls passing the material are long. If the amount of catenary loop differs between rolls, unevenness will occur in the product.Therefore, the amount of catenary loop has been conventionally detected, and based on this detection result, control is performed to keep the amount of catenary loop constant. .

Usually, the catenary loop amount detection device is preferably arranged at the position where the loop is deepest. Also, recently, due to technological innovation, small and lightweight laser eclipsometers with high detection accuracy have been used. FIG. 3 shows an example in which the loop amount is detected using such a laser eclipsometer. In FIG. 1, the sheet passing material 1 is passed through in the front-back direction of the paper surface, and a laser deviation meter 2 is arranged at a substantially central portion of the sheet passing material 1.

[0004]

[Problems to be solved by the device]

 However, such a conventional catenary loop amount detection device has a drawback in that the loop amount cannot be accurately detected when the strip material is inclined as shown in FIG. 4 due to the shape of the material, meandering, or the like. there were.

The present invention has been made to solve such a conventional problem, and an object thereof is to provide a catenary loop amount detection device capable of detecting the catenary loop amount with high accuracy. Especially.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention provides a catenary loop amount detection device for detecting the catenary loop amount of a process line using a laser excursion meter, wherein the laser excursion meter is a line. It is characterized in that a plurality of units are installed in the width direction of and the means for obtaining the average value of the output of each laser eclipsometer is provided.

[0007]

[Action]

 In the present invention configured as described above, the catenary loop amount is detected by a plurality of laser eclipsometers, and the average value of each detected value is used as the feedback signal for controlling the catenary loop amount. Therefore, the loop amount can be accurately detected regardless of the shape and meandering of the strip material.

[0008]

【Example】

 FIG. 1 is a schematic diagram showing the configuration of a catenary loop amount detection device to which the present invention is applied. As shown in the figure, in this example, four laser excursion meters 2a to 2d are arranged at equal intervals in the width direction of the strip material 1. Then, the outputs of the laser eccentricities 2a to 2d are supplied to the arithmetic unit 3 as shown in FIG.

The arithmetic unit 3 includes A / D converters 4a to 4d provided for the respective laser eccentricities 2a to 2d, and scaling units 5a to 5d also provided for the respective laser eccentricities 2a to 2d. And a computing unit 6, a scaling unit 7, and a D / A converter 8. Next, the operation of this embodiment will be described. The signals detected by the laser excursors 2a to 2d are digitized by the A / D converters 4a to 4d and then supplied to the scaling units 5a to 5d. Then, the scaling units 5a to 5d calculate the loop amounts at the mounting positions of the laser eccentricators 2a to 2d from the supplied digital signals. At this time, assuming that the loop amounts obtained by the laser eclipsometers 2a to 2d are a to d, the loop amounts a to d are supplied to the calculation unit 6.

Then, the arithmetic unit 6 obtains the average value of the loop amounts a to d and uses this value as the feedback amount for the constant catenary loop amount control. Further, this average value is scaled by the scaling unit 7 for output to an external display meter, and is analogized and output by the D / A converter 8.

As described above, in the present embodiment, four laser excursion meters 2a to 2d are used to detect the catenary loop amount of the sheet passing material 1, and each of the excursion meters 2a to 2d is used to determine the route. The average value of the amount of pull-up is field-backed. Therefore, the catenary loop amount can always be detected accurately regardless of the shape and meandering of the strip material 1.

Although four laser eclipsometers are used in this embodiment, the present invention is not limited to this, and a plurality of laser eclipsometers may be used.

[0013]

[Effect of device]

 As described above, in the present invention, the loop amount is detected using a plurality of laser eclipsometers, and the average value of each loop amount is used as the feedback signal for controlling the loop amount. Therefore, it is possible to provide the catenary loop amount detection device capable of reducing the influence of the error due to the shape of the plate material, meandering, and the like.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an arrangement configuration of a catenary loop amount detection device according to the present invention.

FIG. 2 is a block diagram showing an internal configuration of a catenary loop amount detection device according to the present invention.

FIG. 3 is a configuration diagram showing a conventional example.

FIG. 4 is an explanatory view showing an example when the sheet passing material meanders in the conventional apparatus.

[Explanation of symbols]

 1 plate material 2 laser deviation meter 3 arithmetic unit 4 A / D converter 5 scaling unit 6 arithmetic unit

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Claims (1)

[Scope of utility model registration request] 1. A catenary loop amount detection device for detecting a catenary loop amount of a process line using a laser excursion meter, wherein a plurality of the laser excursion devices are installed in the width direction of the line, and the output of each laser excursion meter is measured. An apparatus for detecting the amount of catenary loop, comprising means for obtaining an average value of