SU1366968A1 - Method of measuring signal phase - Google Patents

Description

(21) 4082977 / 24-21

(22) 05.05.86

(46) 01/15/88. Bul № 2

(71) Main Geophysical Observatory. A.E. Voeikov

(72) B.C. Snegurov

(53) 621.317.77 (088.8)

(56) USSR Author's Certificate No. 651268, cl. G 01 R 25/00, 1976.

USSR Author's Certificate No. 462145, cl. G 01 R 25/00, 1973.

(54) METHOD OF MEASURING THE SIGNAL PHASE

(57) The invention relates to electrical measuring equipment and can be used to measure the phase shifts of harmonic components of broadband signals, in

Particularly for the study of the phase spectra of electromotive radiation of both artificial and natural origin in the low frequency range. The aim of the invention is to improve the speed when measuring the phase of the harmonic components of the broadband signals. The effectiveness of the proposed method consists in the possibility of simultaneously measuring the phase shift of the harmonic components of the broadband signal at the time of measurement and recording information about the phase characteristics of the harmonic components in the ultra-long wavelength range in a short time. 1 il.

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The invention relates to electrical measuring equipment and can be used to measure the phase shifts of the harmonic components of broadband signals, in particular, to study the phase spectra of electromagnetic radiation, both artificial and natural, in the low frequency range.

The purpose of the invention is to increase the speed when measuring the phase of harmonic wideband signals.

The drawing shows a block diagram of the device, explaining the essence of the proposed method.

The device contains N blocks of phase meters, including a band-pass filter 1-15 shaper 1-2 zero transitions, trigger 1-3, element Pi 1-4, frequency divider 1-5, counter 1-6 pulses, the first 7 are highly stable and the second 9 driver rectangular pulses, the generator 8, the indicator 10, and the inputs of the bandpass filters 1-1, N-1 and the formers 7, 9 are connected to the source of broadband pulse signals, the outputs of the bandpass filters are connected to the inputs of the formers 1-1, N-2 zero- transitions, the outputs of which are connected to the first inputs of the triggers 1-3, N-3, in The second inputs of which are connected to the output of the first driver 7, and the outputs to the first inputs of the elements 1-4, N-4, the second inlets of which are connected to the output 1 by generator 8, and the outputs through dividers 1-5, N-5 frequencies - with counters 1-6, N-6 pulses, the outputs of which are connected to the inputs of ind. 10, the output of the generator 8 is connected to the second inputs of the first 7 n second 9 pulse shapers, and the output of the second driver is connected to the synchronizing input of the indicator 10.

The device works as follows.

The broadband signal is applied to the inputs of the band-pass filters 1-1, N-1 and to both formers, 7.9 rectangular pulses. Since the principle of operation of the phase meter blocks is the same, consider the operation of the first block 1. The response of the bandpass filter 1-1 is fed to the shaper of 1-2 zero transitions, at the output of which short impulses are formed, corresponding to

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66968, 2

the moments of the signal zero crossing. The leading edge of the broadband signal starts the shaper 7 of a highly stable rectangular pulse, the duration of which is chosen to be 5-8 periods of the lowest operating frequency and is determined by the quality factor of the bandpass filters on the basis that it is reasonable to measure the phase in the cf. . With the falling edge of a rectangular impulse from the output of the first driver, a trigger 1-3 overturns, and a logic unit level is formed at its output. The closest impulse of the zero transition of the driver 1-2, the trigger 1-3 is set to the initial state. Thus, at the output of the trigger, a rectangular pulse with a duration equal to the phase with a harmonic component at a given frequency is formed. This pulse is filled with quantizing pulses from the output of generator 8. Next, through a divider 1-5, quantizing pulses arrive at counter 1-6. Depending on the 30 operating frequency, the division factor in the divider 1-5 is adjusted so that the output number of pulses corresponds to the phase of the phase (one degree - one pulse). The number of pulses counted by counter 1-6 is recorded on an indicator or a CPU whose operation is controlled by a signal from the output of the second driver 9 rectangular pulses. The duration of the pulse controlling the operation of the indicator 10 or the CPU is determined by the method of indication, visually or by recording on the CPU tape. With the automatic recording of the phase characteristics of the components of a wideband signal, the processing and recording time of information is determined by the lowest of the operating frequencies. Thus, at a frequency of 1 kHz with a good quality bandpass filter 20, the information processing time is about 10 ms, and the recording time on CPU-16/3 is in the order of 30 ms.

The effectiveness of the proposed method in comparison with the prototype lies in the possibility of simultaneous measurement of the phase by the harmonic components of the broadband signal at the time of measurement and recording of information and phase characteristics of the harmonic.

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monic components in the superlong wavelength range in a short time.

Claims (1)

Invention Formula The method of measuring the phase of the signals, concluse 1, is that the moments of zero transitions of the measured variable voltages are fixed, form rectangular pulses of equal duration to the phase of the tested voltages, encode the phase values by filling with quantizing pulses, and measure the phase of the harmonic component 6 meter (times (/ signal, characterized in that, in order to increase the measurement speed, harmonic components are extracted from the wideband signal, the beginning of the wideband signal is recorded and the first highly stable right-angle pulse is formed, the phases between the falling front of the first signal are measured a highly stable rectangular pulse and the nearest zero transitions of the harmonic components of the signal, and phase shifts of the harmonics are measured according to the number of quantizing pulses.