SU843211A2 - Device for monitoring time intervals of coded messages - Google Patents

Description

(54) DEVICE FOR CONTROL-TEMPORARY INTERVALS OF CODED ASSEMBLIES, 3 The disadvantage of this device is that it does not allow control with high accuracy, moreover, is not reliable enough. The purpose of the invention is to improve accuracy. The goal is achieved by the fact that the device dp control, containing blocks for selecting the beginning and end of the row, the output of the last of which is connected to one trigger input, the other input of which is connected to the output of the sending start block and one of the second trigger inputs , the second input of which is connected to the output of the element NOT, the first output of the first trigger is connected to the control input of the comparison unit, the information inputs of which are connected to the outputs of the reversible counter, the second output of the first trigger connected to the first inputs The elements AND to the control input of the reversible counter, the summing and subtracting inputs of which are connected respectively to the outputs of the first h of the second elements AND, the second inputs of which are connected to the output of the pulse generator, the first and second outputs of the second trigger are connected to the third inputs of the first and second elements And accordingly, a counter, a programmable decoder switch, a delay line, two AND elements, an OR element, and a control trigger are entered, the counter outputs being connected to the first through a programmable decoder. th input switch group, a second group of inputs of which is connected to the tap line. delay, the switch output is connected to the first input of the OR element, the output of which is connected to the inputs of the NOT element and the selection blocks of the beginning and end of the coded parcel, the output of the latter is connected to the installation input of the counter, the counting input of which is connected to the input bus of the device and the first inputs of the first and second And elements, the second inputs of which are connected to the first and second outputs of the control trigger, respectively, the single input of which is connected to the auxiliary output of the decoder, the output of the first And element is connected with zero trigger input / control and delay line input. 14, the output of the second element AND is connected to the second input of the element OR. Figure 1 presents the block diagram of the device; figure 2 -time diagrams of his work. A device for monitoring time intervals of a coded parcel contains a NOT 1 element, a parcel start selection block 2, a blocking end block 3, a counting trigger 4, a trigger 5, And 6 and 7 elements, a reversible counter 8, a comparison block 9 (with a memory node) , generator 10 pulses, input bus II, output bus 12, element OR 13, elements AND 14 and 15, controllable trigger 16, delay line 17 with switched outlets, switch 18, programmable decoder 19 and counter 20. Input bus 11 is connected to the inputs of the counter 20 elements And 14 and 15, the Installation output d counter 20 connections with the output of block 3 of the end of the parcel, and its information outputs are connected to the inputs of a programmable decoder 19, which can be made on the basis of multi-input elements And the outputs of the decoder 18 are connected to the inputs of the switch 18. Switch 18 can be performed on two-input elements I. An additional output of the programmable decoder, which is the combination of the outputs of the multi-input elements And is connected to a single input of the trigger 16. The second inputs of the switch 18 are connected to the outlets of the line 17 delay, the output of the switch 18 is connected to the first input of the element OR 13, the second input of which is connected to the output of the element AND 14, the second input of which is connected to the inverse output of the trigger 16, the unit output of which is connected to the second input of the element 15. The output of the element 15 connected to the input of the delay line 17 and to the zero input of the control trigger 16. The output of the OR element 13 is connected to the inputs of blocks 2 and 3 of the selection of the beginning and end of the padding, respectively, and through the element 1 with the input of the counting trigger 4. The output of the block 3 of the end selection osylki connected to the zero input of the flip-flop 5. The output unit 2 starts sending the isolation unit is connected to the input of flip-flop 5 and to input the installation countable tpiggera 4. One you. 58432

the stroke of the counting trigger 4 is connected to one of their outputs of the element And 6, and the other of its output is connected to one of the inputs of the element 7. 7. One output of the trigger 5 is connected to one of the inputs j of the elements 6 and 7 and the input of the reversing counter 8. Zero output of the trigger 5 is connected to the input of the comparison unit 9. The second inputs of the elements 6 and 7 are connected to the output of the generator about 10. The output of the element 6 is connected to the input of the summation, the output of the element 7 to the subtraction input of the reversible counter 8. The information outputs of the counter 8 are connected to the inputs of is compare 9.

The device works as follows.

The device nodes are reset to the initial state by a pulse from the output of the block 3 of the sending end, which is applied to the inputs of the counter 20 and the trigger 5, the signal from its output sets the prohibition on the first inputs of the elements 6 and 7 and sets initial state reversible counter 8.

The state of the counting trigger 4 during the absence of a coded parcel does not affect the operation of the device, the DA, as it is set by a pulse from the output of block 2 to that state (Fig. 2), in which the forward output of trigger 4 has a low potential, which sets at the entrance of element 35 and prohibition 6.

The pulses of the generator 10 do not pass to the output of the elements 7 and 6, since at least one of their inputs has a prohibitory signal. .40

Suppose that the second and seventh time intervals of a parcel are not multiples of the frequency of the oscillator 10. In this case, the programmable decoder 19 must contain two multi- 45 operating elements I.

The pulses from the outputs of the multi-input elements AND the programmable decipher of the switch 19 are combined and set the control trigger 16 into such a connection, in which the element 15 is hidden for a pulse, the second interval is determined, and the element 14 is hidden for the passage of this pulse coded parcels 55

The trailing edge of this pulse from the output of the element H 15 trigger 16 is set to such a state, when

which element AND 15 is closed, and element AND 14 is open, and pulses from the output of element AND 14 arrive through the element OR 13 to the inputs of the element NOT 1 and blocks 2 and 3 of the selection and the end of the package, respectively.

The pulses from the output of the element 15 are fed to the input of the delay line 17, where they are delayed by an amount determined by the expression

T | in-ggts-ACh where T-7 time interval code VIHT

shipped parcel;

Tpgj - oscillator frequency period; p - integer number of oscillator frequency periods, placed in a controlled interval;

At is the remainder of the Time interval less than. The switch of the second interval is opened by signals from the outputs of the npo-decoder 19. Then the delayed pulse determining the second time interval becomes delayed by q tj and from the combined output of the switch 18 through the element OR 13 enters the inputs of the element 1 and blocks 2 and 3 of the selection of the beginning and end of the parcel.

Thus, the pulses that determine the time intervals that are multiples of the generator-frequency period arrive through the element 14 at the inputs of the above-mentioned control unit nodes unattended, while the pulses detect the time intervals that are not a multiple of the frequency of the generator through the element 15 are received at the entrance of the delay line.

The magnitude of the delay of each pulse is set to a multiple of T via the programmable decoder 19 and the switch 18.

The distribution of pulses to the input line 17 of the delay and without delay to the output of the element And 14 carries out a programmable decoder 19 by means of a trigger 16..

The first impulse of the coded parcel of positive polarity from the output of the element OR I3 through the element NOT 1 is fed to the counting input of trigger 4. The pulse from the output of block 2 acts on the input of trigger 5 with separate start.

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Trinigra 4 and 5 are set by the leading edge of the first pulse. At the direct output of the trigger 5, a high potential is set, which is permitting for the elements 6 and 7, and removes the prohibition from the control input of the reversing counter 8.

The trigger 4 is set by the leading edge of the first pulse from the output of block 2 to such a state that its potential is set low at the forward output - the prohibition for element 6, which is removed when the first pulse is sent from the output of the HE element 1 to the counting input of trigger 4 .

The pulses from the output of the generator 10 through the open element And 6 are fed to the input of the summation of the reversible counter 8.

At the moment the second pulse arrives at the counting input of the trigger 4, at one output of which a low potential is set (prohibition for element 6), at its other output is high potential (resolution for element 7), the pulses from the generator 10 output are fed to the reverse subtraction input counter.

Thus, all defining odd time intervals of the coded parcel allow the pulses to go out of the generator 10 output and the summing input, and even ones allow the reverse counter B to be input to the subtraction input. The pulse from the output of block 3 sets the trigger 5 to the state where the prohibition on the inputs of elements 6 and 7 and the resolution on the additional input of block 9, which this moment compares the number (remainder) of the alternate addition-subtraction of pulses

1B

from the generator's code 10. When the compared codes are equal, block 9 generates a pulse at output 12. When the difference between the codes of the permissible value is exceeded, block 9 does not generate a pulse. With the arrival of the next sending of pulses, the operation of the device is repeated.

Claims (1)

1. USSR author's certificate No. 663098, cl. And 03 K 5/18, 1977.