SU763669A1 - Device for measuring length of rolled stock - Google Patents

Description

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The invention relates to instrumentation engineering and can be used to measure the length of products in the rolling metal production industry from the lurgic industry or, for example, in the formation of glass.

A device for measuring the length of hire is known, comprising sensors installed at equal distances jg from one another along a transport roller table, J pulse generator, pulse counters, control keys and reset pulse counters, and a computing unit (X

The disadvantages of the known device are the low measurement accuracy and the impossibility of measuring the length in the rolling process.

The closest to the technical essence of the invention is a device for measuring the length of rolled products containing the first rolling position sensor mounted at a fixed distance from the axis of the rolls 25 in the direction of rolling, the second rolling position sensor located at a fixed distance from the first sensor in the direction. opposite the HanpaaJieH o. rolling stock, a rolled stock sensor, a pulse sensor mechanically connected to the rollers, an impulse counter, the counting input of which is connected to the output of the pulse sensor, and the first control input to the output of the second rolled position sensor, And, the first input of which is connected to the output of the rental presence sensor, the second input is connected to the output of the pulse sensor, and the third input to the output of the first rental position sensor, multiplication unit, pulse generator and summing pulse counter 2.

A disadvantage of this device is that the measurement accuracy is not high enough due to the lack of consideration of the effect of a change in the reduction of metal during the rolling process.

The aim of the invention is to improve the measurement accuracy of the rolled steel.

The goal is achieved by the fact that the proposed device is equipped with additional rental position sensors installed behind the first rental position sensor in the direction of travel at regular intervals of length equal to the distance between the first and second rental position sensors, the switching unit whose inputs are connected to the outputs of the corresponding additional and the first rental position sensors, and the first output is connected to the second control input of the pulse counter, a key unit-, the control input of which is connected o the second output of the switching unit, sig (The normal inputs are connected to the corresponding outputs of the pulse counter, and the control outputs are connected to the fourth input of the And element, the register, the signal inputs of which are connected to the corresponding signal outputs of the key block, the control. The input is connected to the third output switching unit, and the output is connected to the first input of the multiplication unit, the second input of which is connected to the output of the AND element, the control unit, the first input of which is connected to the fourth output of the switching unit, the second input dinene with the output of the second rental position sensor, and the first output is connected to the control input of the pulse generator, a selector, the first input of which is connected to the output of the pulse generator,: the second input is connected to the second output of the control unit, the third input is connected to the output of the multiplication unit, and the output connected to the input of the summation of a pulse counter, pulse counter with overflow memory, the first input of which is connected to the output of the selector, the second input connected to the output of the second rental position sensor, the third input inen with block output. switching, and the output is connected to the third input of the control unit.

The drawing shows a block diagram of the device.

The device contains the first rental position sensor 1, the second rental position sensor 2, the rental presence sensor 3, the pulse sensor 4, the additional rental position sensors 5, the switching unit 6, the inputs of which are connected to the outputs of the respective additional rental position sensors 5 and the sensor 1, counter 7 pulses, key block 8, register 9, element 10 I, multiplication unit 11 connected by inputs to output of element 10 I and register 9, control block 12, pulse generator 13, selector 14 connected by inputs respectively With the output of the generator of 13 pulses and the output of the control unit 12, a pulse counter 15 with an overflow memory and a totaling counter of 16 pulses.

The device works as follows.

The length measurement is carried out when rolling through the rolls, starting from the moment of fixing the front edge of the rolled product by sensor 2, when

the signal allows counting in the counter 7 pulses from Sensor 4. The signal from sensor 2 also goes to the first input 15, sets it to its initial state and records in it 5th number (E - C), where E is the capacity of the counter 15; 1 is the base length, which is selected based on the minimum length of the car. The same signal from sensor 2 is directly supplied to

the second input of the control unit 12. In this case, the signal from the first output of the control unit 12 starts the generator of 13 pulses, the output signal of which, having passed through the selector 14 pulses ,.

c simultaneously enters the counters 15 and 16. Since the counter 15 is preliminarily written down the number (E-1), overflow will occur after it arrives at its first, the input of the number of pulses numerically equal to

0 value 1. The overflow pulse in the counter 15 is stored and fed to the third input of the control unit 12. When this signal from the output of block 12 turns off the generator 13 pulses. As a result of this operation, a number corresponding to the value of D will be recorded into the summing counter 16. At the moment of fixing the front edge of the rental by the first sensor 5 of the rental position,

0, its signal arrives at switching unit 6, first sets i5ehister 9 to its initial state, then, after a time delay t, via key circuit 8 Records information from counter 7 into the register 9 (the number of pulses N from sensor 4 fixed by counter 7 during the time of rolling a distance of 12 between sensors 2 and 1} and after a time of Shuger ty, the counter resets

 7. The delay Z z is greater than t for the duration of the transients that pass when writing information to register 9.

5 The signal from sensor 1 opens element 10 I, allowing the passage of pulses from sensor 4 to the first input of multiplication unit 11. The second input of the multiplication unit 11 receives the code QQ of the N from the output of register 9, which is maintained as long as the rolling passes the second section 1 j between the sensor 1 and the first additional sensor 5. At the same time, the counter 7 counts the new N.KOTO value at the time of fixing the front edge of the rolled second additional sensor 5 will be N ji and will also be overwritten in register 9 instead of Nf.no as rolling progresses and fixing its front edge with additional sensors 5 described above processes occurring in blocks 6,7,8 and 9 will be repeated ok to be.

Claims (2)

The multiplication unit 11 at this time produces a scaling of the pulses, of the sensor 4 in accordance with the expression B --K, -; f4N, .ia ... M. H N. X2 N, where NX; NX.J ... NX | - the number of pulses at the input of block 11 when passing the front edge of the rolled sections 1; N. j - the number of pulses recorded by the counter 7 during the passage of the same sections. t ,, wj ,. - W - scale coefficients corresponding to the same areas. At the moment of fixing the rental by position sensors, starting with sensor 1, the signals from them go through the switching unit to the second input of counter 15, reset it to its initial state and then write the number ( E - 1a). Scaled pulses of length 1 from the output of block 11 through the selector 14 of pulses arrive simultaneously in counters 15 and 16. Since the counter 15 has a pre-recorded number (E -), its overflow will occur after the number of pulses that are numerically different 12. Since the scale factor m over the entire measurement area P is assumed to be constant and to some extent differs from the actual current scale, the number of pulses 1x can be received into the meter 15 by the next position sensor 5 into the counter 15 from the output of block 11. value 1 This is due to the error of averaging. Using blocks 12, 13 and 14, the number of pulses 1X coming from the output of block 11 is periodically corrected to the input of counters 15 and 16. If by the time of fixation of the car with the additional position sensor 5, the number of pulses 2 must go to counter 15 the counter 15 at the moment of counting 1x 11 goes to the third input of the block 12. At the same time, from the block 12 to the control input of the selector 14 of the pulses a signal arrives that prohibits the input of the counters 15 and 16 of the pulses 2 exceeding the value l. The ban will be in effect until the front edge of the car is fixed with an additional sensor 5 of the position of the car. The signal from the sensor 5 through the block 6 sets the counter 15 to its initial state and writes the number (E - 12) 1 also to the input of the block 12. At the same time, the effect of its signal on the control of the pulse selector 14 and the counting of pulses 1x in counters 15 and 16 will occur in the manner described. If by the time of fixation of the rental by an additional sensor 5 of the position, the pulses | 1 I 2 are received in the counter 15, then the information of the counters 15 and 16 will be corrected. Since the overflow signal from the counter 15 has not yet arrived at block 12, the signal from the output of the block 6, corresponding to the moment of response of sensor 5, having passed through block 12, starts generator 13. Pulses from generator 12 through selector 14 enter counters 15 and 16 to record a number that is not enough to the value of P. After additional recording of missing pulses, an overflow signal of counter 1 5 through block 12 turns off the generator 13 pulses. The selector 14 pulses also produces a separation of the pulses entering the counters 15 and 16 simultaneously from block 11 and the generator of 13 pulses. At the time of fixation of the rental by the remaining additional sensors 5 of the position of the rental, the processes described above are repeated. The measurement ends at the time of rolling out of the rolls. In this case, the signal from sensor 3 closes element 10 I, stopping operation of multiplication unit 11. This device allows you to measure the length of the product during its rolling with increased accuracy. The results of measurements of the current coordinate of the movement of rolled metal and its final length obtained with the help of this device do not carry the errors due to the change in the amount of metal reduction during the rolling process. Apparatus of the Invention A device for measuring the length of a rental comprising a first rental position sensor mounted at a fixed distance from the roll axis in the direction of rolling, a second rental position sensor located at a fixed distance from the first sensor in the direction of the institute opposite to the rental direction of rolling, Proca presence sensor: one pulse sensor mechanically connected to the rollers, a pulse counter whose counting input is connected to the output of the pulse sensor, and the first control input from the output The second input of the rental position sensor, element I, the first input of which is connected to the output of the rental sensor, the second input connected to the output of the pulse generator, and the third input of the output of the first rental position sensor, multiplication unit, pulse generator and summing pulse counter, different. In order to improve the accuracy of the measurement, the device is equipped with additional rental position sensors installed behind the first sensor of the rental position in the direction of travel at regular intervals of length equal to the distance between the first and second rental position sensors, switching unit, the inputs of which connected to the outputs of the respective additional and first sensors of the rolling stock, and the first output is connected to the second control input of the pulse counter, a key block, the control input of which is soy It is connected to the second output of the block 1mutation, the signal inputs are connected to the corresponding single b pulse pulse meters, and the control output is connected to the fourth input of the AND element, the register whose signal inputs are connected to the corresponding signal outputs of the key block, the control input is connected to the third output of the switching unit and the output is connected to the first input of the multiplication unit, the second input of which is connected to the output of the element I, the control unit whose first input is connected to the fourth output of the switching unit, the second The input is connected to the output of the second rental position sensor, and the first output is connected to the control input of the pulse generator, the selector, the first input of which is connected to the output of the pulse generator, the second input is connected to the second output of the control unit, the third input is connected to the output of the multiplication unit, and exit Q is connected to the input of a pulse counter, a pulse counter with overflow memory, the first input of which is connected to the output of the selector, the second input is connected to the output of the second rental position sensor, 5, the third input is connected to the output of the switching unit, and the output is connected to the third input of the control unit. Sources of information taken into account in the examination 0 1. USSR author's certificate 590589, cl. 6 01 B 7/0, 1976. 2. Aitor's Certificate of the USSR 331243, class C 01 B 7/0, 1970 (prototype).