SU1415037A1 - Device for measuring length of moving articles - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to increase accuracy by eliminating errors within the base. When the trailing edge of the product appears at the first sensor 2, the pulse generator 12 generates counting pulses of the base distance until the next sensor 2 triggers when a new accumulation of the number in the counter 16 is made. The start of measurement of the length of the remainder is determined by the matching of any of the sensors. 3, in the presence of at least one sensor 2. The base number is supplied to the key 18 with the low-order bits rejected according to the scale. For a reference of 0.1 base lengths, the number BCDE is taken at the entrance of the key, and a number is formed at the output of the key. (B + P CDE, which corresponds to replacing the rejected part of the base number not by zero, but by one, With the cessation of the counting in the counter 16, the counting direction in the counter 17 is switched, and the counter 19 receives parallel writing commands from block 20 and starts working with counting the generator pulses 12 on the subtraction inputs. Pervpu counts up to zero the counter 19, at the signal of its zeroing a pulse is output to the counting input decas (C 4 SP O 00

Description

The holes S of the length counter 21 and into the control block 20, according to which the block 20 performs the recording of the number into the counter 19, and the counting is repeated. When the counter 17 counts to zero, its zero signal is issued on the triggers 10,

11, setting them back to their original state, thereby prohibiting the passage of the pulses of the generator 12 to the inputs of the counters 17, 19 .. The counting stops, and the contents of the counter 21 are copied to register 22. 1 Il.

This invention relates to measuring

technology.

The aim of the invention is to improve the accuracy by eliminating errors within the base.

The drawing shows a diagram of the device.

A device for measuring the length of two moving products 1 contains sensors 2 and 3 of product availability, formers 4 and 5, coincidence circuits 6-8, trigger 9-11 ,. pulse generator 12, matching elements 13-15, base number counter 16, remainder number counter 17, key 18, remainder counter 19, remainder counter control unit 20, length counter 21 and register 22.

The device works as follows.

Prior to the start of the measurement, the result of the last measurement is registered on register 22; triggers 9–11 are in the initial state. In counter 16, the base number is from the previous measurement, and counter 17 is zero. Coincidence element 13 is locked with zero of trigger 9, element 14 with zero of trigger 10, and element 15 with zero from trigger output 10 New product 1 moves over sensors 2 and 3 without changing the state of the device until the trailing edge appears. When the trailing edge of product 1 appears at the first sensor 2, shaper 4 emits a pulse, which sets trigger 9 in one position, allowing pulse generator 12 to pass to the counting input of counter 16 of the base number, and passes through circuit 8 to zero resetting counter 16. Pulse counting in counter 16, it occurs from zero and continues until the next sensor 2 is triggered, when

 resetting the counter to 16, and starting the new count, i.e. new accumulation of numbers in the counter 16.

The moment of the beginning of the measurement of the length of the rim is determined by the operation of any of the sensors 3 from the front edge of the product, provided that at least one sensor 2 is present, the observation area of which the rear edge of the product has already passed. At the same time, at the output of the coincidence circuit 6, a pulse appears that sets the trigger 11 to a state in which from its first output to the input of the element 15

5, a signal is issued permitting the passage of the pulses of the generator 12 to the addition input of the counter 17, and another trigger output prohibits the passage through the circuit 8 of the pulse to

A counter zeroing input 20 is received. By the time the next sensor (during the movement of the product) of the sensor triggers, the counter 16 accumulates the number of pulses corresponding to the basic

 the length, and in the counter 17, the number of pulses corresponding to the length of the remainder; simultaneously, through the coincidence circuit 7, a pulse passes to the input of the trigger 10, which sets the trigger 10 to a state in which its first output allows the generator 12 to pass through element 14 to the inputs of the subtraction counter 17 and counters

35 to 19, it also enters the input of block 20 for generating instructions for writing parallel codes. The second output of the trigger prohibits the passage of the generator pulses through the element 15 on

40 input adding counter 17.

At the same time, the signal from the high side of circuit 7 sets the trigger 9 to the zero state, which prohibits the generator pulses 12 from passing through element 13 to the counting input of counter 16. Thus, within one base length (in this case, from sensor a to sensor b), : the number in the counter 16 is the base number A B C D E, the number in the counter 17 is F, G, H, P, Q - it is always less than the number of the base.

At the same time, the base number is applied to the key 18, rejecting the low-order bits corresponding to the scale. For example, 0.1 base length is taken at the input of the key number B C D E and at the key output a number is formed - (B + I) CDE. This corresponds to replacing the rejected part of the base number (rejected by A) not by zero, but by one. rounding in abundance, not deficiency.

Simultaneously with the termination of the counting in the counter 16, the counting direction in the counter 17 is switched, and the counters 19 receive parallel recording commands from block 20 and also begin to work with counting the pulses of the generator 12 through the subtraction inputs. The first to reach zero is counter 19 with bits (D + 1) E, when it is zeroed, a pulse is outputted to the counting input of the decade S of the length counter 21 and to the control unit 20, according to which the unit 20 again records the number in this counter (D + l) E, and the count is repeated. It is assumed below that the remainder in length is greater than 0.1 base, in order to trace the operation of all the counters. It turns out that counting cycles by (D + OE will be nine until the counter reaches zero with C + 1, D, E prerecorded. The zero signal of this counter causes the counter to be forced to zero (D + I) E is fed to the counting input of bit N of the length counter 21, i.e. the number of cycles of its zeroing is counted. Also, re-writing C + 1, D, E and counting this number to zero is repeated nine times until the zero is the counter of the i-bit of the most significant bit, with the input number B + 1 CDE, which repeats its cycles with zeroing of the counters (C + 1) DE and (D + I) E and recording zero reset signals on the counting input of the discharge M of the length counter 21, until the counter 17 counts to zero. When the counter 17 counts to zero, its zero signal is output on the triggers P and 10, setting them to the initial state and thereby disabling the passage of the pulses of the generator 12 to the inputs of the counters 17 and 19. The count is stopped, and the contents of the length counter 21 are rewritten into the register 22, as a result of measuring the length is obtained.

The measurement error resulting from the operation of the meter is the residual number in the counter (D + l) E - in the low-order counter, which did not reach the next lowest unit of length (to its zero).

Claims (1)

Invention Formula A device for measuring the length of moving articles, comprising sensors of the presence of the product located at equal distances from one another in the direction of movement of the product trigger, a pulse generator, a residue counter, a residual counter control unit, a length counter and a register connected therewith. that, in order to increase accuracy, it is equipped with an additional group of product presence sensors, each of which is located at an equal distance from one another in the direction of movement of the product, with two formers, each The first of which is connected to one of the groups of product availability sensors, connected in series by the first coincidence circuit, the second trigger, the second coincidence circuit, the third trigger, the first coincidence element and the residual number counter, the base number counter, the third coincidence circuit connected to it, the second and third elements. match, the output connected to the input of the counter of the base number and the second input of the counter of the remainder number, the key, the inputs connected to the outputs of the counter of the base number, and the outputs to the inputs of the counter STATCOM, input counter balance control unit coupled to the first element coincidence counter balance outputs and inputs length counter, a first input of the first coincidence circuit is connected to the input of the first, the second input of the first coincidence circuit is connected to the output of the second shaper, inputs of the first flip-flop connected to the output 5 1415037, first shaper, the first input of its triggers are connected to the second the third matching circuit and the input of the register and the output of the third trigger, and the output - from the per-ka number of the remainder, the first input of the second input of the second element of the same, connected to the input of the counter oscr, the second inputs of the coincident-element ny connected to the output of the generator is connected to the inputs of the length counter, and. pulses, the first and the third input of the second output - with the second input, third) of the second element of the match, connecting the coincidence circuit, the first input is connected to the first output of the second triangle, and is connected to the second input of the second rjepa and the second output of the third match trig-circuit and the counter input r | gra, the second inputs of the second and third-length.