SU1495835A1 - Device for counting ready products - Google Patents

Abstract

The invention relates to automatic counting of piece products and can be used, for example, to count products in units of products. The aim of the invention is to increase the reliability of the device. The device contains a sensor 1, an element OR 2, a counter 3, a generator of 4 pulses, a decoder 5, a switch 6, a trigger 7 and an arithmetic unit 8. The device is based on blocking off the counter 3 when interrupting the signal from sensor 1. Therefore, it is not critical to the duration input pulses and at the same time eliminates false counts from short impulse noise. 3 il.

Description

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The invention relates to the automatic accounting of piece products and can be used, for example, for counting in units of products.

The aim of the invention is to increase the reliability of the device.

FIG. 1 shows a functional diagram of a device for counting finished products; in fig. 2 and 3 - variants of the arithmetic unit.

The device for counting finished products includes sensor 1, element OR 2, counter 3, generator A of pulses, decoder 5, switch 6, trigger 7, arithmetic unit 8, sensor 1 connected to the first input of the element OR 2, the output of which is connected to the installation input of the counter 3, to the counting input of which the generator 4 output is connected, the discharge outputs of the counter 3 are connected to j to the corresponding inputs of the decoder 5 ;,: the outputs of which are connected to the inputs of the switch 6, the third output of which is connected to the S input trigger 7, first- and second outputs - with the corresponding inputs of the arithmetic unit 8,: the fourth output - with the R input of the trigger 7 and with the blocking input of the counter 3, the output of the trigger is connected to the second input of the element OR 2, the output of the block 8 is the output of the device (the code output view of the scoreboard).

Sensor 1 can be made as a contactless circuit, for example in the form of a photorelay, and in the form of contacts of relays, contactors, etc.

Block 8 (Fig. 2} contains, for example, the encoders 9 and 10, the arithmetic logic unit 11.

The incoming signal from the output of the switch in the cipher 9 generates the operation code for the node 11, and in the encoder 10 on the other signal from the switch 6 received for the second input the code of the numerical value for performing the mathematical operation in node 11 set by the encoder 9 (addition, subtraction, multiplication, etc.). ; In the proposed device (Fig. 1), it is understood that the decoder 5 outputs pulses in contact with time over its outputs. If the implementation of the decoder 5 is to be provided so that its output signals are not in contact with each other, it will not be necessary

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In order to pause for block 8 between the pulses from the first and second outputs of the decoder 5, it is necessary to perform the operation from the signal on the first input of block 8.

The block 8 (Fig. 3) includes the element OR 12, the toggle switch 13 and the count-; chick 14.

i When the toggle switch 13 is turned on, the pulses coming from the outputs of switch 6 pass through two inputs through the element OR 12 and are counted by counter 14. If the toggle switch 13 is open, for each cycle of operation of the decoder 5, counter 14 counts only one pulse (the second input block 8).

Blocks 12 and 14 can be performed, for example, on IC K 561LA7 and IE8. : The device works as follows.

In the initial state, the output of the sensor 1 is fed to the first input of the element OR 2 zero signal, which ensures the retention of the counter 3 in the initial zero state. The generator 4 generates pulses that continuously arrive at the counting input of counter 3, but its state is due to the effect of the zero signal from sensor 1. The zero code of the counter 3 goes to the code inputs of the decoder 5, the zero output of which has a signal 1, and all the other signals O. Block 8 is in the initial state, and the trigger 7 is in the zero state, indicating the second input of the element OR 2 O signal.

With the occurrence of signal 1 from sensor 1 output, the prohibition of counter 3 is lifted, which starts counting the time delay, which prevents the passage of signals of interference, which are shorter than a certain number of oscillator clock 4, (for example, shown in figure 1 less than 3 cycles). This time delay can obviously be chosen by any other value by changing. connecting blocks 7 and 8 to the outputs of the decoder 5 (via switch 6); the capacity of the counter 3 and correspondingly the decoder 5; frequency generator 4.

Therefore, in this case, if the signal from the output of sensor 1 is interrupted during the first 3 periods of the generator 4 frequency, the counter 3 will be reset, and

when signal 1 is restored at the output of sensor 1, it will first start counting the pulses of generator 4, thereby checking the signal from sensor 1 for continuity. As soon as the continuous part of the sensor 1 signal starts, the decoder 5, sequentially generating signals at its outputs, sends a pulse ffa to the fourth output, which sets trigger 7 to state 1, thereby providing signal 1 to the second input of the element OR 2. This signal will provide maintaining the enable signal I at the installation input of the counter 3 until the moment of issuing a pulse at the eighth output of the decoder 5, regardless of the continuity of the signal from the sensor 1. Pulse. From the eighth output of the decoder 5 will return the trigger 7 to its original state, stopping the confirmation of the signal 1 from the sensor 1 at the output of the element OR 2 (at the installation input of the counter 3). If by that time the signal 1 from the output of sensor 1 has ceased, the counter 3 by impulse from the eighth output of the decoder 5 will be reset, thus ensuring the initial state of the entire device.

If by this time the signal I. from the output of sensor 1 does not stop, the pulse from the eighth output of the decoder 5, the counter 3 will be banned by

I will remain in this state until the signal 1 is terminated from the output of sensor 1. At the moment of the termination of this signal, counter 3 is reset, set: Poured into the same descramble state: torus 5. The device as a whole will also After being in the initial state, except for block 8, the modified information will be stored in it.

An impulse from the first output of the switch 6 in block 8 will prepare a mathematical operation (if block 8 is completed according to the scheme shown in

FIG. 2) or one pulse will be counted (if block 8 is made according to Fig. 3), and the second output is impulse

the switch 6 will record the numerical value in block 8 (a mathematical operation will be performed with the received operand value, for example, a certain number is added to the information stored in block 8). This is for block 8 of FIG. 2, and the length of block 8 of FIG. 3 from the second pulse will be counted second unit.

The device has dead time,

increasing its noise immunity, it is uncritical to the duration of the input pulses c. sensor 1, provides the use of modern arithmetic unit 8 with a higher degree

integration (due to the multi-wire communication of the block 8 with the switch), which causes the increased reliability of the device as a whole.

Claims (1)

Invention Formula A device for counting finished products, comprising a sensor, a dapulse generator, the output of which is connected to the counting input of a counter, A switch and a trigger, characterized in that, in order to increase the reliability of the device, the OR element, the decoder and the arithmetic unit are entered into it, the sensor output is connected to the first input of the OR element, the output of which is connected to the counter installation input, the outputs of which are connected via the decoder : with the inputs of the switch, the first and second outputs of which are connected to the inputs of the arithmetic unit, the third output of the switch is connected to the first set-up input of the trigger, the output of which is connected to the second input of the OR element, a quarter the th output of the switch is connected to the second trigger setup input and to the blocking one; counter input. 45 I fie.g