SU1180940A1 - Device for counting items - Google Patents

Abstract

A DEVICE FOR AN OBJECT ACCOUNT containing a sensor connected in series, an amplifier and a threshold element, a pulse shaper, the output of which is connected to the counter input, which differs from it, that, with a circuit for improving the accuracy of the device, a delay element, a synchronization unit, a converter are inserted into it time interval in the code, the comparison unit and the code master, the output of the threshold element is connected to the inputs of the synchronization unit and the delay element whose output is connected to the information input of the interval converter In a code whose output is connected to the first information input of the comparison unit, the output of which through the pulse shaper is connected to the first control input of the time interval to code converter, the first and second outputs of the synchronization unit are connected respectively to the second and third control inputs of the time converter in the code, the third and fourth outputs of the synchronization unit are connected respectively to the control inputs of the comparison unit and the unit master, the output of which is connected to the second information e 00 input comparator block. from 4

Description

one

This invention relates to counting devices designed to assemble a stack of folded sheets, and can be used in the printing industry.

The purpose of the invention is to improve the accuracy of the device.

The drawing shows a block diagram of the device.

The device includes a sensor 1, an amplifier 2, a threshold element 3, a shaper 4. Pulses, a counter 5, an analyzer 6 for the duration of impulses, the delay element 7, the synchronization unit 8, a time converter into the code 9, a unit 10 of the code and a block 1 1 compare.

The device works as follows.

The output signal of the sensor 1 is fed to the amplifier 2, amplified in it to a value that ensures the reliable operation of the threshold element 3, and is fed from the amplifier output to one of its inputs, at the second input of which a threshold level is supplied. Element 3 produces a square pulse at the input, the duration of which is determined by the duration of the signal exceeding a given level.

Element 3 generates output pulses that correspond not only to useful signals, but also an interference signal. The amplitude comparison threshold is selected at. In this case, it is assumed that the minimum input signal exceeds the set threshold. The generated signal comes from the output of element 3 to the inputs of delay element 7 and the analyzer 6 synchronization unit 8. When the leading edge of the input signal arrives at the synchronization unit 8, the latter generates control signals from its outputs to the control inputs of the converter 9, unit 10 and the unit 11 comparisons and establishing these functional units in the initial state before the operation. After a time delay, determine the

809402

when the analyzer 6 is set to its initial state, the input signal comes from the output of delay element 7 to information input 5 of converter 9, which converts the duration of the input signal to a comparison parameter in the form of a code that is a linear function of the current duration of the input signal.

As a comparison parameter, the duration of the input signal itself, as well as its amplitude, frequency,

15 phase or other equivalents.

 -. .

The choice of one or another type of converter 9 is determined by the permissible conversion accuracy, speed, noise immunity, cost, etc. The result of the conversion comes from the output of the converter 9 to one of the information inputs of block 11

5, the second information input of which is supplied with a reference signal corresponding to the selected type of converter-9 and the received comparison threshold. Block 11

0 compares the value of the result

conversion with the value of the reference signal and, when the conditions are met, produces a counting pulse. Then the counting signal arrives

j to the input of the imaging unit 4, which converts it to a form suitable for subsequent use in the counter 5. From the output of the imaging unit 4, the normalized signal arrives

0 to the input of counter 5 and simultaneously to one of the control inputs of the converter 9. When a signal arrives at this input, the converter 9 stops working and returns

5 to its original state. If the duration of the input signal is insufficient and the excess condition is not met, then the control signal generated by the synchronization unit 8

0 at a given front of the input pulse, arrives at another input of the converter 9, stops its operation and returns to the initial position.

Claims (1)

DEVICE FOR ACCOUNT OF OBJECTS, containing a series-connected sensor, amplifier and threshold element, a pulse shaper, the output of which is connected to the input of the counter, characterized in that, in order to improve the accuracy of the device, a delay element, a synchronization unit, a time interval to code converter are introduced into it , the comparison unit and the code adjuster, the output of the threshold element is connected to the inputs of the synchronization unit and the delay element, the output of which is connected to the information input of the time interval converter , the output of which is connected to the first information input of the comparison unit, the output of which through a pulse former is connected to the first control input of the time interval converter into code, the first and second outputs of the synchronization block are connected respectively to the second and third control inputs of the time interval converter into code, the third and fourth the outputs of the synchronization unit are connected respectively to the control inputs of the comparison unit and the code generator, the output of which is connected to the second information * input of the block alignment. >