SU771565A1 - Digital phase meter of radio pulse signals - Google Patents

Description

FIG. 1 shows a functional diagram of the proposed phase meter; in fig. 2 depicts timing charts explaining his work. .

Phase meter contains a phase shift transducer - time interval 1, connected to time-pulse converter 2, signal overlay driver 3 connected to time interval generator 4 times the signal period connected to block 5, connected to the second input of the generator of 6 quantizing pulses.

Works phase meter as follows.

The radio pulse signals under study and and 1) 2 {FIG. 2 a and b) are fed to the converter input a phase shift of time 1, forming rectangular pulses of duration proportional to the phase shift (Fig. 2c). These pulses arrive at the first input of the time-pulse converter 2, to the second input of which quantizing pulses arrive. The number of quantizing pulses transmitted to the output of the quantizing unit time-pulse converter 2 is proportional to the measured phase shift. In order for the number of pulses at the output of a time-pulse converter to be a corresponding expression of the measured phase shift, it is necessary that the duration of the quantization process be equal to the time corresponding to the input of the time-pulse converter N quantizing patterns. When the degree expression of the phase shift N is usually equal to 360 Yu. When a time-pulse converter of an N-ro pulse arrives at its input, its time for the unit stops the measurement process.

It is fundamentally indifferent whether the time-carrying pulses will be input to the time-pulse converter continuously or in batches, or the duration of the packs is a multiple of the input signal period and the packs coincide with the signal overlap. In this case, the quantized impulses are stitched without error. If the duration of batches of quantum dich pulses is not a multiple of the signal period, then the stitching occurs with an error.

In the proposed phase meter, the quantizing pulses from the pulse generator b through the coincidence unit 5 arrive in batches multiple to the signal period (FIG. 2 d) at the input of the time-pulse converter 2. The multiplicity of the quantizing pulse packets to the input signal period (FIG. 2e) is provided by the driver 4 times multiple to the period of the signals, the opening block of coincidence 5 at this time (Fig. 2 g). The coincidence of the quantizing pulse bursts with the signal overlapping is provided by the imaging unit 3, which controls the time multiplier that is a multiple of the signal period. The measurement process ends after the time-pulse converter of the N-th pulse arrives at the input (Fig. 2 x). During this time, the number of quantizing pulses arrives at the output of the time-pulse converter (Fig. 2f), which, with N 360 10, corresponds to the degree expression of the measured phase shift. The measurement time consists of two components: active and passive. The passive component is equal to the pauses between packets of quantizing pulses and is approximately equal to the pauses between the overlaps. The active measurement time is almost constant and is determined by the period and the number of quantizing pulses N. The error in measuring the phase shift of the proposed phase meter is equal to the error of the phase meter with a constant measurement time with a measurement time equal to the active component of the proposed phase meter.

Thus, the introduction of a time interval generator that is a multiple of the signal period eliminates the additional error of the prototype and improves the accuracy of the phase meter.

Formula of the invention

Digital phase meter of radio pulse signals containing a phase shift converter - time interval connected by an output to the first input of a time to a pulse converter and to the input of the generator of overlapping input signals, a generator of quantizing pulses connected to the first input of the coincidence unit, the output of which is connected to the second input a time-pulse converter, which is different in that, in order to improve the measurement accuracy, it is equipped with a time interval generator that is a multiple of the period of the input LEFC signals, included th output of the overlap between the input signals and a second input of the coincidence unit.

Sources of information, spirye taken into account in the examination

1. Measuring equipment, 1978 № 11, p. 54, fig. one.

2. Authors certificate of the USSR 585456, cl. G 01 R 25/00, 1977 (PROTOTYPE).

Claims (1)

Claim A digital phase meter of radio-pulse signals containing a phase-shift converter - a time interval connected by an output to the first input of a time-pulse converter and with an input of an input signal overlap driver, a quantizing pulse generator connected to the first input of a coincidence block, the output of which is connected to a second time-input pulse converter, characterized in that, in order to improve the accuracy of measurement, it is equipped with a shaper of a time interval that is a multiple of the period of the input signals, included dy output of the overlap of input signals and a second input of the coincidence unit.