SU368583A1 - MEASURING TIME INTERVALS - Google Patents

Description

one

The invention relates to devices for measuring time intervals and can be used in automation, computing, radar and experimental physics.

. Famous time interval meters include measuring pulse generator, coarse count time gate, subtract two coarse counting units, accurate and coarse measurement counters, coarse measurement ambiguity circuit, coarse measurement ambiguity fixation circuit, ambiguity generator, unambiguous addition circuit of the exact measurement result time-amplitude-time transducers However, these meters have limited measurement limits.

The purpose of the invention is to expand the measurement limits.

It is achieved by the fact that the output of the generator of measured pulses is directly connected to one of the inputs of time-to-ampere-time converters interconnected via a key, and the second input of one of the converters is also connected to the output of the pulse-generator through a key.

FIG. 1 is given a functional diagram of the described meter; on .fig. 2 - time di agram-ma of his work.

The meter contains a generator / dimensional pulses connected via a coarse counting temporary gate consisting of trigger 1, key 3 and trigger 4, key 5, and a subtraction scheme for two units of coarse counting: trigger 6 with a counting input, trigger 7 and key 8 with counter 9 coarse measurement. A coarse count time gate is connected to a coarse measurement ambiguity circuit that includes a delay line 10 and a switch // and connected to a time-amplitude-time converter 12 and a coarse measurement ambiguity fixation circuit containing a delay line 13,

key 14, driver 15, line 16 zaderlski, trigger / 7 and connected to the driver 18 ambiguity. The meter also includes an accurate meter 19, a key 20, a converter 21

time - amplitude - time and counter 22, connected to the unambiguous addition scheme and D / 2. The latter consists of trigger 23, keys 24, 25, trigger 26 with a counting input, key 27, trigger 28, keys 29, 30 and lines

31 delays.

In the initial state, the coarse 9 and exact 19, 22 counters are set to zero. Triggers 2, 7, 23, 28, respectively, keys 3, 8, 24, 29, and vi 30 in the closed state. Triggers 4 VL 17 hold keys 5 and

29 in the open state, and the keys 20 and 25 in the closed state. The keys 11 14 14 s of the former 18 are blocked by the impulses of the prohibition zone of the ambiguity of fixing the measured pulses of the synchro with the sequence of dimensional pulses (fit. 2a, b. The starting impulse I goes to the key 11 of the delay line 10 and on (Converter 12 (Fig. 2b) .

If the starting impulse enters the prohibition zone, then it does not pass through key 11, and, delaying the line 10 by 0.5 TO, where TO is the period of the measured impulses, overturns trigger 2 in a state in which key 3 is open for passing measured pulses through the subtraction scheme of two units on the counter 9 (Fig. Chg, d).

The first 3-dimensional impulse that passes through the key goes to the transducer 12, where the linear stretching of the segment a / C times occurs (Fig. 2e, g). This transformed time interval is filled with pulses from generator 1, recorded by a counter 19, the maximum capacity of which is / Sto, and when it overflows a transfer pulse arises, which triggers trigger 28 to a state in which key 29 opens and through it new counter passes through counter 9 impulse K, delayed by line 31 of delay by 2 / С.

If the stop pulse falls into the prohibition zone, then it does not pass through key 14, and, delaying by delay line 13, flips trigger 4 to the state in which key 5 closes, stopping the flow of dimensional pulses to the coarse count counter and opening key 20, to which measured impulses arrive. The first measured impulse passed through the switch 20 is fed to the converter 21. The transformed length of time is filled with pulses from the measuring pulse generator, and the number of pulses at a given time interval is recorded by a counter 22. IF a transfer pulse arises in the counter, it tilts trigger 26 with a counting input . If the stop pulse / С does not coincide with the prohibition zone, it passes through the key 14, the driver 15, enters the trigger 4, tilting it to the state in which the key 5 is closed and the key 20 is opened. Also, delaying the line 16

delay 2to, this pulse through the system of subtraction of two units of coarse counting enters the counter 9. With the imaging unit 15, the pulse arrives at the trigger 17, tilting

it is in the state in which the key 25 is opened and the key 27 is closed. After the measurement, the addition takes place. The time interval is the number of pulses that is not enough to fill up.

counter 22. The stop pulse delayed by delay line 31 2Ato enters key 29 and, if it is open, counter 9, as well as trigger 23, tilting it to a state in which keys 24 and 30 open. Dimensional pulses passing through the public key 24 simultaneously arrive at counters 19 and 22. When counter 22 overflows, a transfer impulse occurs, which enters either through the public key 25, or

through the key 27, tilting the trigger 23 into a state in which the key 24 is closed, stopping the flow of pulses to the counters 19 and 22. Thus, in the counter 19, the number of pulses constituting the segments D and is summed up. If, a transfer pulse occurs, which through the public key 30 enters the coarse meter.

subject matter

A time meter, containing a measuring pulse generator, a coarse count time gate, a subtraction scheme for two coarse counting units, an accurate and coarse measurement counter, a coarse measurement ambiguity circuit, a coarse measurement ambiguity fixation circuit,

the ambiguity zone former, an unambiguous addition of an accurate measurement result, and time-amplitude-time converters, characterized in that, in order to expand the measurement limits, the output of the dimensional pulse generator is directly connected to one of the time-amplitude-time converters interconnected through each other key, with the second input of one of the converters

also connected to the output of the pulse generator through the key.