SU868638A1 - Method of determining electric pulse center - Google Patents

Description

The invention relates to electrical measuring equipment and can be used in tracking systems. A known method for determining the mean of an electric pulse, is that the input pulse is delayed using constant delay elements and a variable front delay, the pulse generated from the falling pulse of the input pulse is delayed using a variable delay delay element, and the pulse is sent in the delay elements To meet each other, the delayed pulses are removed from the taps of the delay elements and sent to the inputs of the coincidence blocks, the output of one of which is received with a constant delay relative to This input signal has a pulse that distinguishes the middle Tl. The disadvantage of this method is the limited functional possibilities — it does not allow to determine the midpoint of the electrical pulses of an aperiodic pulse sequence in a wide range of variations in their duration and the time intervals between them. The closest to it: to the invention by its technical essence is a method for determining the middle of electric pulses, consisting in quantizing controlled pulses and pauses between controlled pulses of two separate frequencies, multiples of two, counting quantizing pulses that fill the controlled pulse and pause, up to a given number and the formation after the end of the counting of the impulse that marks the middle of the coitrolized impulse, and the process of determining the midpoint begins by filling in the pause between the first and impulses f23. The disadvantage of this method is limited functionality — it does not allow to determine the middle of an electric pulse of an aperiodic sequence in a wide range of changes in their duration. and the time interval between them and also does not allow to determine the middle of the first controlled pulse. The purpose of the invention is to expand the functionality. To achieve the goal, a method for determining the center of electric pulses, which consists in quantizing the controlled pulses and pauses between controlled pulses by pulses of two different frequencies that are multiples of two, counting the quantizing pulses that fill the controlled pulse and pause to a given number and forming after the end of the pulse count which marks the middle of the controlled pulse, is complemented by the fact that every last controlled pulse in the sequence is sent to the control-free ki of the previous controlled pulses channel, where it is quantized. pulses with a given repetition rate, and a pause following a controlled pulse — pulses with a doubled repetition frequency — the pulses filling the controlled pulse and the pause are counted and at the time when their total number reaches the specified number, they form a pulse marking the middle of the controlled pulse, with the minimum number of channels, the frequency and the overall number of counted quantized p (their pulses are given with the relations between the ratio of the frequency of the quantizing pulses, the minimum and maximum ximal in sequence, with the monitored pulses and the minimum time interval between the monitored pulses. The drawing shows a device that implements the method. The device consists of channels 1-1 1-2, ..., 1-N, having main inputs, .. ., 2-N and additional inputs 3-1, ..., 3-N, main outputs 4-1 ,, .. 4-N and additional outputs 5-1.,., 5-N, generator 6 quantizing pulses frequency F, delay element 7, second output 8 of the device. Each channel consists of an input two-output key 9, the first element OR 1 of the generator 11 pause pulses, the first and second keys 12 and 13, the generator 14 of quantizing pulses, the second element OR 13, the counter 16 pulses and the third element IPI 17. minimum number of channels equal to min and max l "ii) the frequency of the quantizing impulse repetition is equal to F. The total number of quantized pulses that fill the controlled pulse and pause is determined from the ratio "/, mzhs. . n K (1 + ip). IMiN, and «« iG maximum and minimum in the sequence of the duration of the controlled pulses; —minimal in time after the interval — the time interval between the controlled pulses; —the multiplicity factor of the frequency of the quantizing pulses. The device works as follows. The input controlled pulse is fed to the main input 2-1 of the first channel 1-1 and through the normally closed output of the key 9 to the control input of the key 12, switching it to the closed position. Quantizing pulses of frequency F from the generator 6 through the key 12 and the element OR 15 are fed to the counting input of the counter b pulses. At the end of the controlled pulse, the key I2 comes to its original position (normally closed) and disconnects generator 6 from counter 16. Simultaneously from the decline of the controlled pulse, the shaper 11 pauses and issues a control {1st signal on the cylinder 13, switching it to the closed position . At counter 16, oscillator pulses with a frequency of 2F begin to arrive at the oscillator 14 through the element OR 15. At the same time, the pause shaper 11 drives through the OR IO element a control signal to key 9, which disables channel 1-1 from subsequent input pulses until the end of processing the first monitored pulse, simultaneously connecting input 2-1 to the main input 2-2 of the next (second) channel , opening the way to the next controlled pulse on the second channel 1-2. The processing of the first pulse in channel 1-1 continues until

 the counter will not pass n pulses, and at eio the output does not have its own pulse, corresponding to the middle of the controlled one. This impulse, passed through the element OR 17, is fed to the first output 4-1 of the device.

At the same time, the impulse from the output of counter 16 is fed to the pause generator 1, which generates signals to the initial position in series of key 13, counter 16 and through key OR 10 key 9. Channel 1-1 is free from processing the first controlled pulse and is ready for processing second or subsequent pulse.

However, if at this moment the next controlled pulse passes through the normally open output of the key 9, then this pulse through the OR 10 element maintains the control signal on the key 9, and until the end of the controlled pulse does not open the processing channel that is not processed, thereby preventing false triggering .

If by the time the signal in channel 1-1 finishes, the controlled output of the key 9 does not pass the controlled pulse to the next channel, then the signal produced by the pause generator 1I brings the key 9 to the initial position, and the next controlled pulse enters channel 1- one.

Thus, controlled pulses of any aperiodic sequence of pulses in the sequence of their arrival are sent to the channel that is free of processing and, after processing at the first output 4-1 of the device, receive a sequence of pulses marking the middle of the controlled with a constant delay t-.

To combine the midpoints of the monitored pulses with the pulses marking their midpoints in time, the monitored pulses are delayed by a delay element 7 and at the output of this element, which is the second output 8 of the device, receive a sequence of pulses shifted from the beginning of the first monitored pulse at a constant This delay time t is equal to the delay time for the output of pulses marking the middle.

The method makes it possible to determine the midpoints of aperiodic pulses after 686.66

pulse lengths with an arbitrarily wide range of variations in their duration and time intervals between them with the minimum number of channels, allows marking the midpoints of single pulses and pulses of periodic sequences, as well as marking the midpoint of the time tj of monitored pulses delayed by a JO. The delay time for each particular process is constant and, if necessary, can be taken into account or 1 compensated.

Claims (2)

1. USSR author's certificate number 505969, cl. G 01 R 29/02, 1973. 2. Authors certificate of the USSR S 180657, cl. G 01 R 29/02, 1964 (prototype). I I I 1