SU535749A2 - The device tolerance control time intervals - Google Patents

Description

The invention relates to radio electronics and can be used in decoding schemes for n pulse () time intervals.

According to the main author. St. 344587, a time tolerance monitoring device is known, which contains an inverter, coincidence circuits, triggers with separate inputs, a two-input precision delay device, in which, to increase the accuracy of monitoring time intervals, the first element I is connected to the device input, the exact delay unit, the outputs of the latter are connected to the inputs of the first trigger, the inverter connected in series, the second element I and the second trigger, while the output of the first trigger is connected to the inputs of the first and second elements AND to the input of the second th flip-flop and its output connected "input of the first AND gate, whose output is the output device.

However, the known device makes it possible to control the time interval consisting of only one time interval T, or a two-pulse time interval (l 2), where n is the number of pulses, which reduces the accuracy of the control.

In order to improve the accuracy of monitoring time intervals in the proposed device

To allow control of time intervals, additional trigger, first and second elements AND, as well as an inverter are introduced, and the output of the first trigger is connected to one of the inputs of the first additional element AND through the second additional element AND and the additional trigger connected in series to the other input of the first element And, and the output of the exact delay unit is connected to the second input of the second additional element And directly and to the second input of the first additional element And through and nvertor.

At the output of such a device, an “O” signal appears indicating a mismatch between the controlled n pulse (n, -2) time interval and the reference one, if at least one of the D segments of the monitored interval does not match the reference / nom, taking into account the specified tolerance field ± D on controlled interval. If all the segments Ti of the controlled n pulse time interval correspond to the reference ones, then the signal "O, indicating a mismatch between the monitored interval and the reference interval, does not appear at the output of the device.

The drawing shows a structural electrical circuit of the proposed device. The tolerance control device - time intervals consists of the first element I 1 with three inputs 2, 3, 4 and output 5, the first trigger 6, the second element I 7, with two inputs 8 and 9 and output 10, and the inverter 11, block 12 exact delay, the second trigger 13, the first additional element And 14 with two inputs 15 and 16 and the output 17, which is the output of the device, the second additional element And 18 with two inputs 19 and 20 and the output 21, additional trigger 22 and additional inverter 23. The input 2 of the first element And 1 is controlled by the second trigger 13, at the input The sequence of pulses of the reference interval from the output of the first trigger 6 is inputted, and the output of the second element AND 7 is input to another input. The sequence of pulses of the reference interval is input to input 9 of the element 7 and another sequence 8 is transmitted to the other input 8 inverted using the inverter I. A pulse sequence is fed to the input of the trigger 6 from the first output of block 12, the first and second pulses of which are delayed relative to the first pulse of the monitored interval by the value T i -D, TZ -b.t nominal, respectively, where T i „„ is the nominal value of the first segment of the controlled three-pulse interval, T i is the nominal value of the second segment of the controlled three-pulse interval, A / is the value of the specified tolerance field for the monitored interval. From the second output of block 12 to the other input of the trigger 6, a sequence of pulses is applied, the first and second pulses of which are delayed relative to the first pulse of the monitored interval by the value of TI -f D /, TI + D ilOMOM, respectively, i.e. the duration of the pulses generated by trigger 6 is 2D /. Since the pulse front of the first segment of the controlled interval lies within the corresponding reference impulse, the state "On the flip-flop 13 at the output changes to the opposite at the time corresponding to the beginning of the reference impulse. At this time, the signal “1 of the monitored interval inverted by the inverter 11 acts at the input 8 of the element 7 and the signal“ 1 of the reference pulse corresponding to the first segment of the monitored interval at the input 9. The coincidence signal "O from the output 10 of the element AND 7 throws the trigger 13, which opens the element AND 1 to the input 2 in the time interval Ti - b. -fD, nominal At the moment of arrival of the pulse of the first segment of the monitored interval, the element And 1 turns out to be open at three inputs 2, 3, 4, and at its output 4 there appears a coincidence signal "O. In the period of time determined by the duration of the reference impulse and the duration of the impulse delayed in block 12 by Ti -f Dg, the second additional element And 18 is closed along inputs 19 and 20. At input 20 of the element 18, the signal “On the reference impulse s the trigger output 6, and the input 19 - the signal "On the impulse deducted in the flea 12 by the value of Ti -f A. .. Thus, in the specified time interval from the output 21 and the element And 18 to one input additional trigger 22 acts" 1, therefore the coincidence signal “O from the output 5 of the element AND 1 throws the trigger 22 at another input to the state “O”, which closes the first additional element AND 14 at the input 15. By the time the pulse 14 arrives at the input 16 of the pulse delayed in block 12 by the value of Cho “+ D and inverted by an additional Inverter 23, And element 14 is closed at input 15, and a "O signal at its output 17 does not appear. At the end of the pulse duration, delayed in block 12, the TI + D / I element is opened, and element 18 opens, since at its inputs 19, 20 a coincidence signal acts "O with his high code 21 flips trigger 22 at the output to state" 1 the opening element AND 14 at the input 15. At the end of the reference pulse corresponding to the α-first segment of the monitored interval, the trigger 13 at the first input is transferred by the signal "O of the sequence of reference pulses to the state" O, which is maintained until output 10 of the element E 7 the signal does not match or "O. If the pulse front of the second segment of the monitored interval is ahead of the front of the corresponding reference pulse, and the pulse decay of the second segment of the monitored interval in the temporary position is within the duration of the standard pulse, then the state of the On flip-flop 13 changes to the opposite liste after the pulse of the second segment of the monitored interval, since at the output 10 of the element And 7, the signal "O" appears, because both its inputs 8 and 9 are affected by the signal "1. The coincidence signal "O at the output 10 of the element And 7 flips the trigger 13 on the second input to the state" 1 opening the element And 1 at the input 2. The coincidence signal "O at the output 5 of the element And 1 does not appear, as it is closed by input 3. Thus, by the time Ti + tt

nom

The state "1 at the output of the trigger 22 does not change. At the time of arrival of the pulse delayed in block 5 of the exact time delay by the value

/ 2 .t

nom

and inverted by an inverter 23, the AND element 14 is open at two inputs 15, 16, and at its output 17, a matching signal O appears indicating that the monitored three-pulse interval does not match the reference one, taking into account the specified tolerance field ± A per controlled interval.

If the pulse front of the second segment of the monitored interval lies within the corresponding reference pulse, the state of the On flip-flop 13 is reversed at the time corresponding to the beginning of the reference pulse, the And 1 element at inputs 2, 4 is open in the time interval

Gg,

nominal

at the moment of arrival of the pulse of the second segment of the monitored interval, the element And 1 turns out to be open in three inputs 2, 3, 4, and at its output 5, a "O signal" appears. Since in the time interval determined by the duration of the reference pulse and the duration of the pulse delayed in the block, ke 12 by the value Tz -f M,

nom

And 18 is closed by inputs 19 and 20, then the match signal "O from output 5 of element And 1 flips trigger 22 to the state" O, which closes element 14 from input 15.

Thus, the pulse delayed in block 12 by the magnitude

Ha

nom

the output of element 14 does not pass, i.e. the signal of coincidence "O at the output of element 17

And 14 does not appear, which indicates the correspondence of the controlled three-pulse interval to the reference one, taking into account the specified tolerance field e; A / for the controlled interval.

The proposed device generates at the output a signal corresponding to the monitored interval, as a result of which the decoding accuracy of the n pulse () interval-time codes is improved.

Claims (1)

Invention Formula Device tolerance control of time intervals for auth. St. 344587, characterized in that, in order to improve the accuracy of monitoring time intervals, an additional trigger, the first and second elements AND, and the inverter, are introduced into it In this case, the output of the first trigger is connected to one of the inputs of the first additional element AND through the second additional element AND and the additional trigger, the output of the first element And is connected to another input, and the output of the fine delay block is connected to the second input of the second additional element And directly the second input of the first additional element And through the inverter.