SU1195430A2 - Device for generating time intervals - Google Patents

Abstract

DEVICE FOR THE FORMATION OF TIME INTERVALS by author. St. 8222164, characterized in that, in order to increase the accuracy of the formation of time intervals, it additionally contains n elements AND, and the device start input is connected to the first input of the jth element AND, the output of which is connected to the single input j-ro shaper, and the second inputs of the elements And are connected to the corresponding inputs of the fixed frequencies of the device ..

Description

UD CD

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WITH

The invention relates to a pulse technique and automation and can be used to build software and logic control systems when it is necessary to form a sequence of precise control time commands for actuators of one technological chain, and the durations of the commands can differ from one another in one or several ways. as well as for counting and issuing signals when a predetermined number of pulses is reached, which allows dosing of the material or products given pro-gram.

The aim of the invention is to improve the accuracy of the formation of time intervals.

The drawing shows a functional diagram of the device for the formation of time intervals.

The device contains n flip-flops 1, a counter 2, for example, a decimal, a 3 memory, each of which can contain a control key 4 and a programmable permanent storage unit 5 (for example, a binary-ten switch), an element OR 6, a switch isolation unit 8, comparison unit 9, which can be made as a set of ELITICAL OR 10 bit elements, whose outputs are connected to the input of an IL-NOT 11 element, whose output is the output of the comparison block 9, drivers 12 and n 13 And elements 13 The outputs of counter 2 are connected to the first th group comparison unit 9 inputs. The outputs of all blocks 3 of the memory of the connection with the inputs of the 8 junction block, the outputs of which are connected to the second group of inputs of the comparison block 9, j and the device start input (j 1, ... n are connected to the first input of the j-ro element I 13, the output of which is connected to the single input of the j-th trigger 1 via the shaper 12. Zero Input j-ro of the trigger 1 through the shaper 12 is connected to the output of the compare block 9, and the single output to the j-th output of the device. Each output of the device is connected to the read input the corresponding memory block 3 and the corresponding input of the IL element And 6 and control switch input 7, output

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which is connected to the input of the counter 2. The control input of the counter 2 is connected to the output of the element OR 6. The information inputs of the switch 7

5 are connected to the inputs of fixed frequencies of the device and the second inputs of the corresponding elements And 13.

The device works as follows.

10 In the initial state, all control triggers 1 and bit triggers of counter 2 are reset to zero, keys 4 are closed.

After the arrival of the trigger signal 15-pa at the first input element And 13,

For example, the first channel of time reference, only at the moment when a fixed frequency counting pulse at the second input of the output element I 13 arrives, a start trigger of control trigger 1 appears, which is turned on at the instant of the falling edge of this pulse due to the former 12. In this case, there is a rigid synchronization of the beginning point of the time interval with the beginning of the period of the following counting pulses of a fixed frequency. After starting the first trigger 1, a high potential appears at its single output and the corresponding output of the device, which opens the key 4 of the first memory block 3 and, through the OR 6 element, removes the signal

 blocking the counter 2 and, acting on the switch 7, allows the passage of one of the fixed frequencies, providing the required

range of time. Value required4L

MY time span

(the required number of accumulated pulses) is established by means of a block 5, to which power is supplied through the corresponding keys 4.

Af

 The output signal of block 5, represented by a binary code, through the block 8, the bit is fed to the input of block 9 in such a way that signals of the same name of counter 2 and block 5 are input to each of the bit elements EXCLUSIVE OR 10.

Thus, upon reaching the required time delay at all

The 55 outputs of the EXCLUSIVE OR 10 elements present a low potential, therefore, at the output of the OR-NOT 11 element a high potential of 3,1954,304 appears.

dial under the influence of which wa through the corresponding elements

through the driver 12, the first trig-And 13 synchronization on, or

Ger 1 returns to its original state (well, at the end of the formation of the first

left) state, followed by the all-time interval. In this case

the elements of the device also return the former 12 to the initial state. Startup 1 is connected to zero.

the next trigger 1 executes a forward trigger. Further

with or on a command from the input, the device-indicated cycle repeats.

Claims (1)

DEVICE FOR FORMING ¹ TIME INTERVALS by ed. St. No. 822164, characterized in that, in order to increase the accuracy of the formation of time intervals, it additionally contains η AND elements, and the jth input of the device startup! connected to the first input of the j-th element And, the output of which is connected to a single input of the j-ro driver, and the second inputs of the elements And are connected to the corresponding inputs of the fixed frequencies of the device _% <1195430