SU1337812A1 - Single=channel infrasonic frequency phase meter - Google Patents

Abstract

The invention relates to information conversion and measurement technology and can be used in the implementation of functional converters, goniometers, etc. The invention provides improved measurement accuracy by eliminating ambiguity in reading the measurement result. The proposed phase meter contains normalizers 1 and 2 amplitudes, adder 3, subtractive block 4, control block 5, keys 6 and 7 with memory, division block 8, delay square 10, arctangent transducer 1 1 and account o) registered) unit 12. Block 5 of the blocking unit contains the first automatic switch 13 connected in series, the latch 14 zero crossings, the single vibrator 15, the trigger 16 and the second l. and the main switch 17. The device; The gvo allows you to measure the dummy pressure of each half period, claim. In this case, possible errors are made, because of the ambiguity of cmniiBa- or the result. 1 il. (L

Description

1317812

relates to information (y and b1 and n y

() Ino-11p is formed by the measuring and measurement technology and can be used for its intended purpose, as well as for the implementation of functional transducers, goniometers, etc.

The purpose of the invention is to measure the measurement accuracy by eliminating the ambiguity of reading the measurement result.

The drawing shows the structure of a single-channel infra-low-frequency phase meter.

A single channel infrared frequency phase meter contains the first 1 and second 2 amplitude normalizers, adder 3, subtraction unit 4, control unit 5, first 6 and second 7 keys with memory, block 8 division, third key 9 with memory, delay element 10, arc tangent converter 11 and reporting unit 12.

The output of the first normalizer 1 amplitude is connected to the first inputs of the adder 3 and the subtractive unit 4, and the output of the second normalizer 2 amplitude is connected to the second inputs of the adder 3 and subtractive unit 4, the outputs of which are connected to the corresponding inputs of the control unit 5. In addition, and, ghol c) of the reading unit 4 is connected to the information input of the first key 6 with memory, and the output of cyNfMaTopa 3 is similarly connected with the second key 7 with memory.

The information codes of the first 6 and second 7 keys with memory are respectively connected to the inputs of block 8, the output of which is connected to an register-tangent unit 12 through a successively connected third key 9 of memory to the arctangent converter 11. The control unit 5 is connected to the control input of the first key 6 with a memory and through the delay element 10 with the control input of the third key 9 with a memory, and the fourth output of the control unit 5 is connected to the control input of the second key 7 with a memory.

The control unit 5 comprises a series-connected automatic switch 13, a zero crossing lock 14, a one-oscillator 15, a trigger 16 and a second automatic switch 17, with the first and second inputs of the first automatic switch 13 being co0

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(uvechvevino peri1m and iri, .ii ihmdami and simultaneousH11 (1 quadruple; and warm B1,1 inputs of block 5 control, and the first and second outputs and 1 (ipoi o automatic switch 17) with (1 responsibility first and BTophiM the outputs of the control unit 5,

Single-channel infra-low-frequency phase meter works as follows.

On the first and BTOpoii inputs of the first and second H (amplifiers 1 and 2 amplitudes, respectively, two sinusoidal signals U, (t.) U sinCJt and U (t) U.sin (rJt - (- pj,) with the same frequency n and unknown (-phase displacement i, These signals could have a different amplitude. At the outputs of normalizers 1 and 2, the amplitudes receive signals U (t) U sinnL and and, (t:) U ,,, sin (QL-i4i,) with with the same amplitude and, which respectively arrive at the first and second inputs of the adder 3 and the subtractive unit 4. At the output of the adder 3, receive the total signal (t) 2U coscf, / / 2s inCslt-cf / 2), the amplitude of which is pronorion Stress to the cosine of the half angle of phase shift.At the output of the subtractive unit 4, a difference signal is received and (t) 2ll sintf / 2 cos (ni-Cf / 2), whose amplitude is proportional to the sine half of the phase angle of the phase shift iLf, (/ 2 The signals ll (t) and), respectively, are fed to the primary one: and the second inputs of the control unit 5. These signals are fed to the signal inputs of the second 7 and first 6 memory keys, respectively. The control inputs of the first 6 and second 7 clusters with memory are supplied respectively with the control signals U-f and and, from the outputs of the control unit 5. In this case, the control) signals on B111 of control unit 5 is a sequence of short interrogation pulses appearing at those times when the signal Uj, (t) at the signal input of the first key 6 with memory has the maximum value U. incf, / 2. Therefore, at the end of the short polling pulses i; at the output of the first key 6 with memory, a constant signal Uj with amplitude 1 is remembered. Uf, y U sincf, / 2. This is the signal value55

The memory is saved until the next short polling pulse U, is received. Similarly, a sequence of HOCTI, short imput polls 1,

 1337812

S yiipa in :: enn kicks the second key 7 points in time, when the signal from the input has a max U. -2U cos if, / 2,

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de this key with the signal U., the amplitude of the moments of arrival

nna and U, arrive at Vhoni, at the output of the signal U ,,, the amplitude with respect to amplitudes

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The COS-signal U (, is fed to the input of the arctangent converter 11 from the output of the dividing unit 8 via the third memory key 9. To the control Bxojr of this memory key, a control signal is given and Control delay element 10 U-, from B1 1 of control unit 5. Time ;, delays are chosen so that the transition process is completed at the output of dividing unit 8 and has time to form the cut; next division is completed. they receive a constant signal t, with an amplitude tg. The values of this signal can change at those moments of the survey, set by the signal and when the signal U, on the output of the division 8 unit has a positive polarity. The signal and, is fed to the input of the arc-tangent converter 11, the output of which receive the signal U,, S arctg (tp; 9y2), where S is the slope of the transducer

Editor L. Lezhnin

Compiled by B.Shubin

Tehred I.Popovich Proofreader L.T.

Order 4126/43 Circulation 730 Subscription

TNPA of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. 4/5

Prc icrolg 1 (-popigraphic enterprise, Uzhgorod, Trogktnch str., 4

convenient for ns11medos gveg (wih s; h (. that phase shift about the shift in degrees but neither the reporting and recording unit 12.

Thus, the proposed device allows to measure the phase shift during each half period, and possible errors due to the ambiguity of reading the result are eliminated.

Claims (1)

Invention Formula five 0 5 0 Q g five A single-channel infra-low-frequency phase meter containing the first and second amplitude normalizers, whose inputs are connected to the first and second input devices of the device, and the outputs are connected to the first and second inputs of the adder and subtraction unit, respectively, whose outputs are connected to the first and second inputs of the control unit, the division unit, respectively. and a series-connected arctangent transducer and a reporting-recording unit, characterized in that, in order to improve the measurement accuracy, the first, second the first and the third keys with the t1, ω and the support element, the first and the second inputs of the control unit are connected respectively with its second and first inputs and with the signal inputs of the first and second keys with a memory, the outputs of which are connected respectively, to the first and second inputs of the division unit, the BL-GCHO of which is connected to the input of the arctang converter via a third memory key, the control input of which is connected through a delay element to the control ry input of the first memory key and to the third control unit output, four the first output of which is connected to a control input of the second yui1emu key memory.