SU517877A1 - Device for measuring time delay - Google Patents

Description

according to the required operation algorithm.

The additional delay line 6 has a delay time significantly longer than the measured delay time, which allows not very fast-acting elements in the device circuit.

The operation of the time delay meter C consists of two cycles.

During the first cycle, the oscillator pulse generates a pulse that passes through the element 5, connected by the 2Commutation unit to the coiled cell, through the additional delay line 3vH 6 and starts the generator I. The resulting pulse train with a sum, A measure of his time is 1, and a delay TV and an additional delay time t (in liOTOpoe includes all delays in the generator's feedback circuit), is fed to the unit 3 forming a temporary I1 terval, which is a counter on the hectare Nij controlling the trigger pulses .mougolny formiruyuschlm etc., teaches this pulse coincides with the beginning of the first pulse and the end - with tsachalo.m (g ha-1) pulse sequence is applied to the unit /. In processing block 4, this RECTAL impulse is fed to one inlet of the coincidence circuit, to the second input of which pulses of a highly stable generator of counting pulses are applied. Reverse counts are the number of counting pulses that have passed through the coincidence circuit. According to KONCH1N | II of the first measurement cycle, the number .VI remains recorded in the counter.

.

1 sch

where T: V is the delay time (ki of the element being measured; t is the additional delay time and

generator feedback circuits; CQ repetition pulse period.

Before the start of the second cycle, the successive element 5 is short-circuited to the co-mutation blocks, the reversible counter ;-) K of block 4 switches to subtraction.

The operation of the meter in the second cycle is similar to the operation of the iB first cycle, but the number of counting pulses N lying in the interval lt is calculated from the contents of the reversible counter

N T ..

At the end of the second cycle, the number M-.V remains in the reversible counter, which is accurate to a constant multiplier n

time delay / s

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If you choose such n and G ,, to, m

THAT NUMBER recorded in the counter at the end of the second cycle is numerically equal to the measured delay time, expressed in nanoseconds.

FORUMA 1A 3 YBREETE AND

A device for measuring the delay time, containing a switching unit, connected to an additional delay line and a measuring element connected to it, a processing and recording unit, characterized in that, in order to extend the range of measurements, a generator of single imulses has been introduced into it, a time interval shaping unit and a control unit, the output of the single pulse generator connected to the input of the switching unit, the output of which is connected to the input of the unit through the time interval forming unit processing and recording the results, the output of the delayed 1Ki line is connected to the generator of RADIO pulse, the outputs of the control unit are connected to the generator of single pulses, the block of iKOMM utation, the unit formed by the time interval, the processing unit and the register, and the inputs of the control unit are connected to the outputs of the time interval forming unit and a processing unit for recording results.