SU1059422A1 - Photo pulse meter of hot-rolled sheet width - Google Patents

Abstract

PHOTOX) PULSE PLAYER OF THE HOT WALLET WIDTH, holding the same identical channel channels, each of which consists of a lens, a diaphragm, a scanning unit in the form of a drum | pulses connected to the common axis of the drums by an electric motor and pulsator, a measuring unit connected: to it is an indicator, characterized in that, in order to improve the accuracy of measurement, it is equipped with an oscillator, connected to the first meter by measuring the first | a channel and a measuring unit, a correction unit, between the second measuring unit and the measuring unit, a core block; Records contains a counter, n odirvibrators with; {KG by garushy duration of pulses, by tunneled to the corresponding outputs of the counter, the element SH, connected between the output. With one-shotrs, the output of the correction unit, and the clock input of the counter are connected to the (L output of the pulsator.

Description

The image of the slant to the measurement technique and can be used in the rolling industry for non-contact measurement of the width of the rolled sheet.

A device for measuring the width of a hot rolled sheet containing a scanning unit, a photoelectric converter, a measuring unit, a recorder 11 is known.

The disadvantage of the device is the low speed performance due to the low scanning speed.

The closest technical solution to the invention is a photopulse gauge of a hot rolled sheet ishrin containing two identical measuring channels, each of which consists of a lens, a diaphragm, a scanning unit in the form of a drum with n notches along a generator, a photo sensor and a starting impulse connected to it. kinematically connected with the actual axis of the drums is an electro-motor and an pulsator, a measuring unit, an indicator 2 connected to it.

However, at high speed, this device has an insufficient measurement accuracy due to the presence of asymmetry in the location of the gaps relative to each other.

In addition, the eccentricity of the drums, associated with the assembly and balancing of them, also leads to a variation in the indicator readings for one turn of the drum.

The aim of the invention is to increase the measurement accuracy.

. The goal is achieved by the fact that the pulse-width meter of the P11 hot-rolled sheet contains two identical measuring channels, each of which consists of a lens, a diaphragm, a scanning unit in the form of a drum with n slots along a generatrix, a photo sensor, and a start pulse generator connected to it kinematically connected with the common axis of the drum, the tectromotor and impulses, the measuring unit, by means of the ECI switch to it, is equipped with a single vibrator, connected between the first measuring channel and the measuring unit The correction unit, the correction unit, the connection between the second module and the measuring unit, the correction unit contains a counter, a set of dimmers connected to the corresponding outputs of the counter, and the WH element connected between the output devices and I connected devices. connected to the output of the pulser.

FIG. 1 shows a blesh-axis meter; in fig. 2 - a separate arrangement of chips $

drum, diaphragm and measurable hot rolled strip; in fig. 3 - plots of signals that explain the principle of the meter.

The photo pulse meter contains two identical channels 1 and 2, consisting of lenses 3 and 4, diaphragms 5 and 6, drums 7 and & with p notch w along the generatrix, rotated by the engine 9 through the shaft 10, on the other end of which a pulser 11 is mounted. In addition to

In addition, the channels contain photosensors 12 and 13 connected to the formers 14 and 15 of old pulses. The one-vibration 16 and block 17 correction included between the channels and the measuring unit 18. Block 17 correction

5 contains a ring counter 19 with a counting C and clock T inputs. Single outputs 20, 21 and 22 are connected to its outputs e, f, g, respectively, the codes of which are combined by the OR OR 23 logic element. The result of the measurement is indicated by the indicator 24. Size B is measured - the width deviation of sheet B 25 from the nominal value B, on. which channels 1 and 2 are installed.

Number of single-channel second channel

5 | Explicitly the number of slots on the drums 7, 8 and conventionally turned out to be three.

Photopulse meter works as follows.

Two channels 1 and 2 are installed above

0 edges of the measured sheet metal 25. The scanning drums 7 and 8 are connected by a common shaft 10 and are driven in rotation by the engine 9. As a result, it is synchronized (phase scanning of images of the edge

Rental zones, formed by 3, 4 lenses and limited to apertures 5 and 6.

When prohonsdenin grooves of the reels 7 and 8 of the images of the edges (moments of time 11, g, diagrams 26, 27), the photosensors 12 and 13 form. Positive voltage differences characterize the spatial location of the measured sheet metal in the field of view of lenses 3 and 4.

Due to the design features of lenses 3 and 4 (their ultimate resolution) and scrambled drums 7 and 8 (the width of the slits is selected in certain sizes), as well as the flexibility of the actual photosensors 12 and 13, the edge zones of the measured rental are displayed in the form of pulses (videoshchialov) with sloping fronts. In addition, due to fluctuations in the temperature of rolling 25, a change also takes place in the amplitudes of the tseosignals. For neutralization, the impact on the result is a measure of these

5 factors serve as a shaper 14 15 starting elements that fix the characteristic points of the video signal fronts that most closely correspond to the edges of the measured rolled metal. Ehhh) may be, for example, the middle of the front or the ka with the greatest steepness of the front of the outer axle. .

The starting pulses corresponding to the times t and tj, k. Determine the desired size, which is formed as. impulse with duration tj - tj (measuring impulse) ...

The sequential formation of the measurement result (the error of the error, which is due to the inability to obtain completely identical results from different slits for the rotation of the drums 7 and S. As a result, the time of the Tartarum t2 - tj have different durations and, t (| j and Uj). ).

To correct this error, the start-up pulses of the second channel are fed to the counting input from the ring counter 19 of the block. ka 17 correction. Before the arrival of the first starting impulse corresponding to the time tn of the counter 19, you set it to its original state with the help of the impulser 1 generating a single impulse per revolution b (diagram 29). After that, the starting pulses arriving at times tji, t22, tzs transfer the ring counter 19 to a state with positive fronts (plots 30, 31, 32) at the output of & x I, f, e, triggering the corresponding single-shot 20 , 21 and 22 (plots 33, 34, 35). The duration of the pulses of the AVP single-shot are set in such a way that the time shift between the times tt tu,

tt3 and rear edges of one-shot were constant values.

The starting pulses of the first channel start a single-digit 16, whose pulses (plot 36), equal in duration to the arithmetic average of the durations of the pulses of the second channel single-cylinder, compensate for the change in the formed channel c. . Pulses of one-shot 16, 20, 21 and 22

A measurement unit 18 is received, which generates the measurement result as a time interval between the interpositive edges of the oscillator single 16 and the corresponding positive 1 1 m pulses of single vibrators

20, 21 and 22 (plot 37). After conversion

this time interval in a convenient dl

perceive the view (constant tense or

with the course of the)) and about the measurable

 D B is indicated by indicator 24.

The device makes it possible to exclude from the measurement result the error introduced by the design features of the scanning bkrabians, consisting in asymmetry; the HOM position of the gaps relative to each other and the presence of eccentricity of the drums

when they rotate.

Claims (1)

A PHOTOPULSE METER OF THE WIDTH OF A HOT-ROLLED SHEET containing two identical measuring channels, each of which consists of a lens, a diaphragm, a scanning unit in the form of a drum [with η slots along the generatrix, a photosensor connected to it by a start-up, ι output pulses with kinematically • the motor axis and the • pulsator, measuring unit, an indicator connected to it, differing in the axis of the drums 1 in that, in order to improve the accuracy of measurement, it is equipped with a single vibrator connected between the first measuring channel * and the Measuring unit, a correction unit connected between the second measuring channel and the measuring unit, the core unit; The section contains a counter, η single-vibrators with an adjustable pulse duration, sub-: connected to the respective outputs of the counter, an OR element connected between the output. single vibrators and the output of the correction unit, and the clock input of the counter is connected to the output of the pulsator. >