SU1224560A1 - Arrangement for measuring length of moving articles - Google Patents

Abstract

The invention relates to a linear measurement technique, namely, to means for measuring the length of moving articles, and can be used, for example, to automate measurements at technological aggregate / tech rolling facilities. The aim of the invention is to increase the reliability of measurements by eliminating false information. The device contains two position sensors of the product being changed, a transporting mechanism, a transducer, the rotational frequency of the kinematic element of the transporting mechanism into a pulse frequency, connected through four input element AND with a counter, two-input element OR, connected to a three-input element AND and four-input element AND , a two-input element And, connected to two position sensors of the measured product, an RS trigger and a multi-input gate circuit, through which the distance code set block position sensors are connected to a meter. The RS-trigger, which fixes the moment of simultaneous action of the measured product on both position sensors, eliminates the delivery of false information about the length of the measured items and creates conditions for the subsequent measurement of the automatic sorting of items into measured and unmeasured ones. (L 8 e Yu Y 4 cl Od o

Description

one

The invention relates to a technique for linear measurements, and specifically to means for measuring the length of moving articles, and can be used, for example, to automate measurements at technological units of rolling mills.

The purpose of the invention is to increase the reliability of measurements by excluding the issuance of false information.

The drawing shows the functionality of the device.

The device contains the first 1 and second 2 position sensors of the measured product, the converter 3 of the rotation frequency of the kinematics element of the transporting mechanism into the pulse frequency, the OR element 4 with one direct and one inverting inputs, the three-input element 5 And, the four-input element 6 And, which has one from the inputs are inverting, counter 7 with information recorded through the code inputs, two-input element 8 I, in which one input is direct and the other is inverting, multi-input valve circuit 9, block 10 of the set of the distance code between the sensors s position and the RS-flip-flop I 1. The diagram marked data outputs of the counter 7 (a tire) and the output member 5 and (tire ft), a single value signal which indicates the end of the measurement. Elements 4 OR and 5 I form a memory, at the output of which a zero signal is preserved in the initial state of the device.

The device works as follows.

The measured product 12, moving by the transport mechanism 13 in the direction indicated by the arrow in the drawing, acts first on the sensor 1 and then on the sensor 2.

Upon exposure of the product to the sensor 1 at the output of the element 8 I, a signal arises, which is fed to the control input of the multi-input valve circuit 9, thereby causing the entry into the counter 7 through the code inputs of the distance code between the sensors I and 2 of the position set in block 10 of the set code. At the same time, the same signal acting on the R input of the trigger 11, the latter is set to zero

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Signing, if before that it was in one state, or its zero state is confirmed. After the product is exposed to the sensor 2 at the inputs of element 6 I, conditions are created for the passage of / pulses from the converter 3 of the rotation frequency of the kinematic element of the transport mechanism 13 to

10 is the counting input of the counter 7. At the same time, the first impulse arriving at the counting input of the counter 7 simultaneously affects the S input of the trigger 11 and sets it to one state, which further allows memory switching on the 4 OR and 5 elements I. All subsequent pulses arriving at the counting input of counter 7 are not changed.

20 put the state of trigger 11, and only confirm its single state. The pulses from the 3-cyi transducer are measured in counter 7 with the distance code specified in it by the sensor

25 1 and 2 as long as the product acts on both position sensors.

As soon as product 12 passes sensor 1, the arrival of pulses from converter 3 into counter 7 is

30 is shrunk. In this case, in the counter) 7, a number equal to the sum of the code of the distance between the sensors 1 and 2 of the position and the number of pulses from the converter 3 counted

35 by the counter 7 for the time during which the measured product affected both position sensors. This number is equal to the measured length i of the product in units determined by

40 at the cost of a pulse converter 3.

As soon as the measured item 12 passes through the sensor 2 hours, a single output appears at the memory output (bus g) formed by the elements 4 OR and 5 AND; signal that takes off. the resolution from the inverting input element 6 And, and the subsequent product acting on the sensor 1, does not cause the passage of pulses from 45

50

the generator 3 to the counting code of the counter 7 and, therefore, the distortion of the code of the length of the previous product, stored in the counter. At the same time, the appearance of a single signal at the output of element 5 I indicates the end of the measurement of the length of the product and can be used to drag information from the outputs

3

Tick 7 (tires and) to external devices for displaying and recording received information on the length of the measured items.

A single signal on the output bus 6 and the length code of the measured product on the tires A are present until the measured length leaves the sensor 2, and as a result, the distance between the position sensors is again written to counter 7, and the RS-three ger 11, the zero state also returns (assuming that the subsequent product already has an effect on position sensor 1).

When in the measurement area falls

An unmeasured product (shown as a dotted line), the length of which is less than the distance between sensors 1 and 2 of the position, the device operates as follows.

When the product is exposed to the sensor 1, the code between the sensors is recorded in the counter 7

I and 2 positions and resetting the RS-flip-flop 11 to the zero state (if before this it was in a single state).

Upon further movement, an unmeasured product ceases to affect sensor 1 until it reaches sensor 2, i.e. its length is less than the distance between the sensors. Consequently, at the inputs of element 6 and the conditions for the passage of pulses to the counting input of counter 7, no RS-trigger

II is in the zero state. Therefore, when the product reaches sensor 2 at the memory output (bus 6J, a single signal does not occur.

Thus, when passing the sensors 1 and 2 of the position to an unmeasured product, a signal indicating the end of the measurement does not appear, which eliminates the subsequent processing of false information (the distance code between the sensors 1 and 2 position present at the outputs of the counter 7 (on the tires a ).

At the same time, the absence of a signal at the output of the memory (on the bus B) during the passage of the product over the sensors 1 and 2 of the position can, if necessary, be unambiguously decoded as a signal of the passage

unmeasured (defective) product and used for the subsequent development of the necessary control actions (for example, to push the unmeasured product from the transport mechanism).

Claims (1)

Invention Formula A device for measuring the length of moving parts, containing two sensors of the position of the measured product, installed along the axis of the trans-porting mechanism in the direction of movement at a distance from one another, the shortest shortest length of the measured products, the frequency converter of rotation of the kinematics element of the transport mechanism to the frequency pulses, counter, multi-input valve circuit, block for dialing the code between the position sensors, four-input element AND, two-input element AND, two-input element OR, The inputs of the four-input element I are connected respectively to the output of the frequency converter and to the outputs of the first and second sensors the inverting input of the two-input element OR is connected to the output of the first position sensor, and the direct input to the inverting input of the four-input element AND, the information inputs the multi-input valve circuit is connected to the code dialing unit, and the control input is connected to the output of the two-input element I, to the direct input of which the output of the first position sensor is connected, and to the inverting output of the second one, the outputs of the multi-input valve circuit are connected to the code inputs of the counter, the input of which is connected to the output of The three-input element And, characterized in that, in order to increase the reliability of measurements, it is supplied with an RS trigger and a three-input element And, the output of which is connected to the inverting input of the four-input element And and the direct input of the two-input element W) We output / house the two-entry element SHS and the second input - with the second position sensor, the RS-flip-flop is connected by single and zero inputs to the outputs of the four-input, respectively 512245606 of the And element and the second two-input terminal to the third input of the three-input element-element I, and the direct output - to that I. -ssiLnp from 12 L LA - - 13 Compiled by L. Kryukova Editor A. Ogar Tehred, N. Bonkalo Proofreader A. Obruchar Order 1913/36 Edition 670 Subscription VNIIPI USSR State Committee for Inventions and Discoveries P3035, Moscow, Zh-35, 4/5 Raushsk nab. Production and Printing Enterprise 1, Uzhgorod, ul. Project, 4