SU403071A1 - ACCOUNT DEVICE WITH VARIABLE COEFFICIENT - Google Patents

Description

one

The invention relates to the field of automation and computer technology and is intended to count electrical signals.

A counting device with a variable conversion factor, consisting of successively connected decades, digital indicators, key elements, the element “OR.

The proposed device is characterized in that it additionally contains a trigger, a delay element and a key, and the output of the element P1LI is connected to a single trigger input, the bullet input of the trigger is connected to the output of a delay element, the output of the trigger is connected to the trigger of the delay element , the other - with the entrance of the first decade.

This makes it possible to increase the accuracy of the measurement results and expand the field of application.

FIG. 1 shows a block diagram of the proposed counting device; in fig. 2 - timing charts of the device.

The device contains decades 1 and 2, each of which consists of four binary counting cells 3 and cascades 4, digital indicators 5, key elements 6, the element “OR 7, trigger 8, key 9, delay element 10.

The device works as follows (Fig. 1).

The state of decade 1 and 2 is determined by digital indicators 5.

The signals from counting cells 3 are switched through key elements 6 and summed on the element "OR 7. Elements 6 and 7 form a device for generating feedback signals with a variable number of these signals. If the frequency of the signals arriving at the input is equal to Po, then signals from the first counting cell 3 of the 1st decade are removed with a frequency of 0.5 Po; signals from the second cell with a frequency of 0.2 By; from the third and fourth cells - with a frequency of 0.1 To, etc. As shown in FIG.

2, these signals, taken from the outputs of cells opposite to those from which the signals of subsequent cells are taken, occur at different times and can be shifted without changing their number. Formed feedback signals

The links go further to the trigger 8 and set it to the state "1. A key 9 is associated with a trigger that guides the input pulses to the input of the first decade, if the trigger is in the "O" state, or to the input of the trigger installation in the "O" state, if it is in this moment in the "1" state. In order for the input signal, changing the state of the trigger 8, not to pass through the key 9 for a decade, to the trigger setup circuit in the “O”

Introduced delay element 10.

Thus, when through one of the closed keys 6 a feedback signal arrives at the input of the trigger 8, the trigger is set to the state of switching the trigger to the state "O is produced by the next input signal, which is excluded from the account. Depending on the state of the keys b, each of the 100 signals recorded by decades 1 and 2 generates from 0 to 99 feedback signals, i.e., from 100 to 199 input pulses are necessary for the counter to register 100 pulses. Due to the uniform distribution of the feedback signals (as illustrated in Fig. 2), there is almost no additional error resulting from the measurement.

In combination with three switched binary counting cells performing a preliminary recalculation of 2, 4 or 8, the proposed device can provide an additional reduction of the input frequency

signals to any coefficient measured by 1% gradations with the presence of two described decades, 0.1% gradations with three decades, etc.

Subject invention

A counting device with a variable conversion factor, consisting of two series-connected decades, containing

countable cells, digital indicators, key elements and the OR element, characterized in that, in order to increase the accuracy of measurement results and expand the scope, it contains a trigger element

delays and a key, the output of the OR element is connected to a single trigger input, the zero trigger input is connected to the output of a delay element, the trigger output is connected to a key, one output of the key is connected to the input of a delay element, the other to the first decade input.

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