SU1244484A1 - Device for measuring dimensions of hot-rolled stock - Google Patents

Abstract

The invention relates to a measurement technique and can be used for non-contact measurement of the geometric dimensions of hot rolled products. The aim of the invention is to improve the measurement accuracy by eliminating false positives of the device in dark areas of the product due to temperature heterogeneity, the presence of scale, water stains, etc. This is achieved by connecting the second shaper of measuring information between the television camera and the register with inverse input, the second counter and adder, the pulse input of the second counter is combined with the counting output of the generator, and the second input of the adder is connected to the output in the first counter, between the output of the first driver and the control input of the BANCH circuit, a trigger is connected, the second input of which is connected to the clock output of the generator and the command inputs of the first counter and register. Both counters are reversible, with the potential input of the first counter connected to the additionally introduced unit of the code for the field of view of the television camera. 1 il. tC 4 4 4 00 4

Description

The invention relates to a measurement technique and can be used, for example, for contactless measurement of the geometric dimensions of hot rolled products in a stream.

The purpose of the invention is to improve the measurement accuracy by eliminating the response of the device on the darkened areas of the product being measured, due to temperature heterogeneity, the presence of scale, water stains and other factors.

The drawing shows a block diagram of the device.

The device contains a television camera 1 with a field of view (Pzr), covering the maximum size of the controlled product LIA 2, generator 3, shaper 4 measuring information with direct input, shaper 5 measuring information with inverse input, trigger b, banned circuit 7, first counter 8 , unit 9 code field of view of the television camera, the second counter 10, the adder 11, the register 12 and the indicator 13. The clock output of the generator 3 is connected to the input of the television camera 1, the R-input of the trigger 6 and the command inputs of the first counter 8 and the register 12, the output of the television camera 1 is connected to the inputs of the formers 4 and 5 of the measuring information, the outputs of which are connected respectively to the S input of the trigger 6 and the command input of the second counter 10, the counting output of the generator 3 is connected to the pulse inputs of the BANNER 7 and second counter 10, the output of the trigger 6 connected to the control input of the BANCH 7 circuit, the output of which is connected to the pulse input of the first counter 8, the outputs of the counters 8 and 10 are connected to the inputs of the adder 11, the output of which is connected to the pulse input of the register 12, the input of the indicator 13 connected to the output of register 12, the output of the dial 9 of the code of the field of view of the television camera is connected to the potential input of the first counter 8, and both of the counters 8 and 10 are reversible.

The device works as follows.

When polling television camera 1 using a generator 3, a video signal is formed at its output, which is a sequence of pulses whose amplitude is proportional to the emissivity of the product being monitored. This output signal is fed to the shapers 4 and 5 of the measurement information. The former 4 highlights the positive edges of the video signal envelope, and the former 5 denotes negative edges.

The impact of amplitude fluctuations will cause at the outputs of the formers 4, 5 local faults, which are manifested in the short-term loss of the signal. These generated signals are used further to quantify the measurable value of Bp as a numerical value. For this from the exit form

The signal body arrives at the input of the S-flip-flop 6. Preliminarily at the moment the field of view is started, the flip-flop 6 is set to an initial state with a pulse from the clock generator 3. As a result, a signal is taken from its output, the duration of which is proportional to the X coordinate of the left edge of the measured item 2.

By entering the control input of the PROHIBITION 7, this signal forms a packet

pulses, counted by the counter 8. Before the beginning of the formation of the pack in the counter 8 from the setting device 9, a number equal to the Csr of the television camera 1 is recorded, and the counter itself operates in the reverse mode. As a result, at its output after the termination of the pulse burst count, a value equal to

The selection of information about the coordinate of the right edge, i.e. X2, occurs in the second counter 10, which also works as the first in the reverse mode. At its pulse input I, the pulses from the counting input of the generator 3 continuously flow, and the command input to the signals from the driver 5, each of which resets the counter to the initial state.

During the measurement cycle, several signals may arrive at the counter 10 of the imaging unit 5, due to the influence of various motion factors; the last of these signals will always contain a signal formed from the right edge of the measured

therefore, regardless of the presence of spurious signals, the second counter 10 generates a value (-X2) proportional to the distance from the right edge of the product to the edge of the Steam of the television camera 1. For normal operation of the device, it is necessary that

The time of the end of the scan in the previous measurement cycle before the scan began, there was a time delay in the next, realized due to the pulse duration from the clock output "T Gene ™ P 3" Information from both counters 8 and 10

enters the adder 11, allocating the value of PZR -X., - X, equal to the measured size Fr.

At the time of the end of the scan of the ADP, this value is rewritten to register 12 and indicated on the indicator 13.

Claims (1)

Invention Formula A device for measuring the dimensions of hot rolled products containing a television camera with a field of view covering the maximum size of the product being monitored, the first measurement information generator, generator, BAN circuit, first counter, register and indicator, generator clock output connected to the television camera input and register command inputs and the first counter, the output of the television camera is connected to the input of the first generator of measurement information, the counting output of the generator is connected to the information input A BREAK scheme whose output is connected to the pulse input of the first counter, the register output is connected to an indicator, characterized in that, in order to improve the measurement accuracy, it is equipped with a second driver of measurement information with an inverse input, a second counter, trigger, adder, and unit code of the field of view television camera, the output of the television camera is connected to the inverse input of the second generator of measurement information, the output of which is connected to the command input of the second counter, the counting output of the generator connected to the pulse input of the second counter, the outputs of the meters connected to the inputs of the adder, the output of the adder is connected to the pulse input of the register, the first counter is equipped with a potential input that is connected to the output of the setter of the field of view of the television camera, the R input of the trigger is connected to the clock output the generator's house, the S-input of the trigger — with the output of the first generator of measurement information, and the output of the trigger — with the control input of the BAN circuit and both counters are reversible.