SU1195276A1 - Phase-meter of low and infralow frequences - Google Patents

Description

The invention relates to the field of radio and electrical engineering and can be used

for measuring phase shifts of harmonic signals when determining phase-frequency characteristics. The purpose of the invention is to increase the stability of the work. The phase meter contains the input 1 of the measuring signal, the input 2 of the reference signal, the first and second drivers 12 and 13, the third driver 3, which generates a signal of the form and the second generator 4, which forms the signal of the form (C 5ϊκ ^ _χ , the first and second multipliers 5 and 6, generator 7, frequency divider 8, band-pass filter 9, phase shifter 10, adder 11, additional frequency divider 14, I) -trigger 15, key © 16, counter 17, display unit 18.

The description contains mathematical dependencies that determine the various operating conditions of the C-trigger. 1 il.

511 „1195276

1 1195276

2

The invention relates to radio electrical measuring equipment and can be used to measure the phase shifts of harmonic signals when determining the phase-frequency characteristics.

The purpose of the invention is to increase the stability of the work.

The drawing shows the block diagram of the device;

The phase meter contains the input 1 of the measuring signal, the input 2 of the reference signal ·, the third driver 3, which generates a signal of the type SchSBCH ^, the fourth driver 4, which forms the signal of the form (! _X 5ί η </ _x , the first and second multipliers 5 and 6, the generator 7, frequency divider 8, band-pass filter 9, phase shifter 10, adder 11, first and second drivers 12 and 13, additional frequency divider 14 ,!) trigger 15, key 16, counter 17, display unit 18.

The input 1 is connected to the first inputs of the third driver 3 and the fourth driver 4, the second inputs of which are connected to. the input 2 of the reference signal, and the outputs through the first and second multipliers 5 and 6, respectively, are connected to the inputs of the adder 11. The generator 7 is connected to the key 16 and serially connected frequency divider 8, the band-pass filter 9 - 'to the second multiplier 6 and through the phase shifter 10 s . the first multiplier 5 and the first driver 12. The output of the adder 11 through the second driver 13 is connected to an additional frequency divider 14, the output of which is connected to the K input B trigger

15. The output of the first driver 12 is connected to the counting input I? -trigger 15, the output of which through serially connected key 16 and the counter 17 is connected to the display unit 48.

The device works as follows.

The measured signal of the form 0 _χ 5ΐη (ω £ is fed to the input 1 of the device,

the reference signal of the type O _о s1pi> 6 is fed to the input 2 of the device. At the output of the formers 3 and 4, signals of the form 0 _x ow Ιί _χ and Y _{x are formed} .

The generator 7 generates pulses that arrive at the inputs of the frequency divider 8 and the key 16. The band-pass filter 9 generates a harmonic signal with a frequency £ of a lower frequency £ oscillator 7 V

.3.6-10 °. The voltage of the form and _about 5 <r \ £ 2 ± (where $? = 27 £) is applied to the reference

5 input of the second multiplier 6 and the input of the phase shifter 10 (90 °), from the output of which a signal of the form 1 ' _с со сΏ4 is fed to the input of the first multiplier 5. At the output of the adder 11 by 10 the voltage is υ _χ And ₀ ο5 (& £ - Ψ _k ). The first and second formers 12 and

13 form of harmonic signals of types C, ο5 $ 4. _and ΙΙ _χ υ cos (-4- ^ x) control pulses. Signal

15 C. the shaper 13 is fed to the input of an additional divider 14, and the signal from the driver 12 is fed to the counting input of the G-trigger 15, to the K-input of which a signal is given

20 from the output of the additional divider

14 frequencies. The pulses from the first driver 12 by a drop of 5 (0-1) overturn the G-trigger 15, provided that its logical input is received from the frequency divider 14 at its P-input. Kaya "1". This happens subject to 7 "_, 7"

from here ί. =

Pulse

thirty

35

40

45

50

¹²⁵¹ '

from the additional divider 14, the frequency difference 2 (1-0) was set15 to the state "0". provided 77/2 +

“1) -trigger This happens 7n ·

—2 ~ ⁼ 4 ~ ' ^{from here}

The time during which the output of the B-flip-flop 15 is present logical "G *, determines how d

The signal from the B-trigger 15 enters the key. 16. During the time d £ through, the key 16 to the counter 17 will pass N pulses, the number of which is determined by the following formula:

N = -ψ —- ύί P_

(one)

(one)

where T _g - the period of the pulses of the generator 7. ' p _r

Ν = ·

ίΐϊί

(2)

If you take L = 3.6-10 °, then the resultV

tat on display unit 18 is fixed in degrees Ν = Μ'χ-10 ^p " ^g with n = 2. Get им = 4χ, deg.

Claims (1)

Claim 55 Low and infra-low phase meter frequency containing sequentially 3 1195276 4 connected generator, key, counter and display unit, the first and second drivers, the third driver, the fourth driver, the first and second inputs of the third and ₅ the fourth formers are connected respectively to the measuring and reference inputs of the phase meter; the first and second multipliers, the control inputs of which are connected respectively to the outputs of the third and fourth formers, the adder, whose inputs are connected to the outputs of the multipliers, and the output to the input of the second driver, sequentially connected frequency divider and bandpass filter, and the input of the frequency divider is connected to another generator output, and the output of the bandpass filter is connected to the reference input of the second multiplier, phasos the motor, whose input is connected to the output of the bandpass filter, and the output with the reference input of the first multiplier and the input of the first driver, characterized in that, in order to increase the operation stability, an additional frequency divider and a p-trigger are introduced, and the additional divider.of frequency input connected to the output of the second driver, the counting input of the E-trigger is connected to the output of the first driver, the P input is connected to the output of the additional frequency divider, and the output is connected to the second input of the key.