SU1388919A1 - Object counter - Google Patents

Abstract

The invention relates to electronics and automation and can be used to account for items in flexible automated manufacturing and control systems. The device is highly reliable and eliminates the possibility of an account tampering. The device comprises a sensor 1, an amplifier 2, a linearly increasing voltage generator 3, a threshold element 4, a HE element 5, a single vibrator 6, an AND 7 element, a counter 8 and a Kong Weier sensor 9. The operation of the device is based on the selection of pulses from sensor 1 for the minimum and maximum durations m. Element I 7 locks in when the conveyor fails, the pulse of the sensor 1 is too short or too long. 2 pcs.

Description

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The invention relates to electronics, in particular, to devices for counting and counting objects and can be used in bending: to automated production and control systems.

The aim of the invention is to increase the reliability of the device and to eliminate the possibility of tampering with the account. FIG. 1 shows the functional-: on the scheme of the device for counting moving objects; in fig. 2 - time diagrams of his work. I A device for counting moving objects contains a sensor; t, an amplifier 2, a generator of linearly increasing voltage, a threshold element 4, a element NOT 5, a single vibrator 6, an element | And 7, a counter 8 and a sensor 9 of a conveyor that consists of a trigger

10 and switch 11.

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t - The device operates as follows:

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The signal of the presence of an object from sensor 1 through amplifier 2 for the generator to generator 3, the output voltage of which is compared in the threshold element 4 with the reference voltage. The signal from the output of the element 4 is fed through the element NOT 5 to the first input of the element I 17 and the One-Vibrator 6, where you form, ms impulse, the duration of which is selected on the basis of the required reliability of the Item Account. Then the signal from one Vibrator 6 is fed to the second input of Element 7, and to the third: its input, a signal comes from sensor 9, which blocks the passage of all pulses of the NRE to the disconnected object, except for

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possibility of falsifying an account in a disabled state.

In the counting device of moving objects (Fig. 2), the pulses are first selected for duration based on the condition that their duration must be not less than the time the object moves in front of sensor 1. This condition is fulfilled in the signal path: sensor 1 - amplifier 2 - generator 3 - element 4. Further, the selection of these pulses is carried out in the circuit: element 5 - element 7 and comes from the requirement that the duration of the pulses from sensor 1 should be no more than the time it takes for the object to move in front of sensor 1.

Claims (1)

Invention Formula A device for counting objects, containing a sensor, the output of which is connected to the amplifier input, a threshold element, a one-shot, the output of which is connected to the first input of the AND element, and a counter, characterized in that, in order to increase the reliability of the device and eliminate the possibility of account tampering, into it a linearly-variable voltage generator was introduced, a NOT element and a conveyor operation sensor, the amplifier output through a linearly increasing voltage generator is connected to the input of a threshold element, the output of which through the NOT element Connected to the input of the one-shot and the second input of the element I, the output of which is connected to the input of the counter, the output of the sensor of the conveyor operation is connected to the third input of the element I. dzig.g