JPS58109807A - Measuring device of material length - Google Patents

Abstract

PURPOSE:To detect precisely the speed of a material without contacting and to obtain the length of the material, by providing a detector at the front and rear ends of the material respectively and calculating the length of the material from the count value obtained from the travelling speed of the material. CONSTITUTION:The travelling speed of a steel plate 9 is measured by a speedometer 10 which detects and amplifies the reflected light of a laser beam projectd on the plate 9 by a photodetector and through a space filter. The steel plate pass detectors 11 and 12 are set at the front and rear sides of the speedometer 10. Then the counting is started by the ON signal of the detector 11 for a counter 14 which counts the output pulses a V/F converter 13 which uses the output signal of the meter 10 as an input. The counting of the counter 14 is stopped by the OFF signal of the detector 12. Thus the length of the plate 9 is calculated by an operator 15.

Description

DETAILED DESCRIPTION OF THE INVENTION 1a) Description of the Technical Field The present invention relates to a material moving on a conveying line.
This invention relates to a material length measuring device for measuring the thickness of a III plate using a non-contact method.

(b) Prior Art Q Explanation Measuring the length of finished or finished steel plates in rolling equipment is important both for information processing and post-processing purposes. It is recommended that the process be carried out in a short period of time and well.

Conventionally used #R length devices for this purpose include a type that generates pulses on the axis of the sub-length roll, a type that counts pulses by contacting the steel material, and a type that counts pulses by making it contact the steel material, and one that counts pulses on the axis of the conveyance table roller. - There is a method in which the pulse of the pulse-generating hot water attached to the rotating lid is set as many times as the threshold for the material to pass. However, these have drawbacks in practical terms, such as slippage between the material and roll, adverse effects on material surface quality, and mechanical strength.

Therefore, an object of the present invention is to provide a material length measuring device that accurately detects the speed of the # plate without contacting the steel plate being transported and converts it into the length of the steel plate, in order to solve the above-mentioned problems. It is in.

(C) For this purpose, the present invention consists of the following configuration.

A speed needle that detects the speed of the running material in a non-contact manner, a converter that converts the output of this speed needle into a frequency output, a tt counter that counts the frequency output from this converter, and this needle aS. a calculator for calculating the material length based on the output of the material; a detector for detecting the leading edge of the material; and a detector for detecting the trailing edge of the material; When the leading edge of the material is detected, the sI counter starts counting, and when the second detector detects 1 trailing edge of the material, the needle counter stops counting the needles, and from the output of this needle I & The computing unit accurately measures the material length.

(d) Effect of the invention An embodiment of the present invention will be described below with reference to the drawings.

Figure JII1 is a configuration diagram of the present invention, which includes a steel plate speed needle 3 that non-contactly measures the speed of the steel plate 2 moving on the conveying table roller, a steel plate detector 4 that detects the leading edge of the steel plate, and a steel plate that also detects the rear end of the steel plate. a detection a15, a pulse generation circuit 6 that generates a pulse proportional to the output of the steel plate speed needle, and the second
It consists of a counter 7 that counts the output pulses of the pulse generation circuit according to the output signals of the two steel plate detectors, and a calculator 8 that calculates the output of the number of pulse stitches 47 as the steel plate length.

Next, let's see how this device works! I will clarify.

Speed of steel plate moving on conveyor table roller nfII
The output of this speed needle is detected by the I4 plate speed meter 3, and is led to a conversion circuit 6 to obtain a pulse rate proportional to the steel plate speed per unit time.

When the tip of the steel plate reaches the steel plate detector 4, the number of pulse stitches is 67
The gate of #I is opened to start counting the pulses proportional to the speed of the steel plate, and when the rear end of the steel plate passes the steel plate detector 5, the gate of #I pulse compensator 7 is closed, and the number of stitches i1i [
N is obtained. Now, steel plate speed needle 3 and #llll detector 4,
Considering the 50th rt relationship as shown in FIG. 42, the length of the steel plate is calculated by the calculator 8 according to the following equation.

L = K-N+ 11 +Is l, ; Distance I between 3 and 4; Distance between 3 and 5; Articles of incorporation N; Count value Here, to obtain the constant Kt, the elongated steel plate is placed offline in advance on the conveyor line. Just move it above and calculate backwards from the count value at this time.

A specific example of a misfire is shown in Figure 43.

In this figure, the speed of ljM4rL9 is determined by the laser beam interference type steel plate speed needle lO, which detects and amplifies the reflected light of the laser beam projected onto the steel plate by a receiver through a spatial filter.
It is measured in

In the present invention, one unit is installed for each #i imitation of this A@speed needle.
llI4 plate passing detectors 11 and 12 are provided, and a counter 14 which takes the output pulse number from the V/F converter 13, which receives the output signal of the steel plate speed needle as input, calculates the number of stitches of the passing carefully 411. and the same (1
At the same time as the OFF signal of No. 2 is stopped, the operator JE unit 15 calculates the steel plate length based on the same signal.

(e) #More than the effect of the invention! As described above, according to the present invention, it is possible to provide a material length measuring device that does not contact a moving steel plate and has a quick response.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of the present invention, FIG. s2 is a layout 1 for explaining operation, and FIG. 63 is a configuration diagram showing a specific example of the present invention. l...Transport roller table 2...Steel plate (secondary length) 3...Non-contact M1 steel plate speed needle 4.5...Steel plate detector 6...Speed [/Pulse signal converter 7...・Pulse counter 8...Steel plate length calculator 9...Steel plate lO...Laser beam interference type steel plate speed needle 11.12...Steel plate passage detector 13...V/F change JI& ... Counter 15 ... Arithmetic unit (7317) Representative Patent Attorney Marosuke Norichika (and 1 other person) 1st
Go to Figure 2 Figure 3 5

Claims (1)

[Claims] A speed needle that non-contact detects the speed of a running material, a tR converter that converts the output of this speed needle into a frequency output, and a counter that counts the frequency output from this converter. It consists of a detector Jla that uses the output of this counter to calculate the length of the material, a detector ml that detects the leading edge of the material, and a detector i12 that detects the trailing edge of the material. When the device d detects the leading edge of the material, the needle counter starts counting, and when the detector s2 detects the rear end of the material, the needle counter stops counting, and from the output of the meter a. The computing unit is a material length measuring device whose purpose is to calculate the material length.