SU61177A1 - The method of determining the sign of the small difference of two frequencies - Google Patents

The method of determining the sign of the small difference of two frequencies

Info

Publication number
SU61177A1
SU61177A1 SU2450D SU2450D SU61177A1 SU 61177 A1 SU61177 A1 SU 61177A1 SU 2450 D SU2450 D SU 2450D SU 2450 D SU2450 D SU 2450D SU 61177 A1 SU61177 A1 SU 61177A1
Authority
SU
USSR - Soviet Union
Prior art keywords
frequencies
sign
determining
small difference
frequency
Prior art date
Application number
SU2450D
Other languages
Russian (ru)
Inventor
В.К. Иодко
Original Assignee
В.К. Иодко
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by В.К. Иодко filed Critical В.К. Иодко
Priority to SU2450D priority Critical patent/SU61177A1/en
Application granted granted Critical
Publication of SU61177A1 publication Critical patent/SU61177A1/en

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Description

За влено 16 декабр  1940 г. за Л 2450 в НК св зи с присоединением за вки № 2451 от того жеIt was filed on December 16, 1940 for L 2450 in the NC communication with the accession of application no. 2451 from the same

в измерительной технике часто приходитс  определ ть знак разности между двум  близкими звуковыми частотами. До сих пор это выполн лось либо с помощью вспомогательного прибора, настраиваемого сначала на одну, затем на другую частоту, либо путем изменени  частоты одного из источников. Первый способ невыгоден тем, что нужно иметь вспомогательный прибор, а второй - потому, что бывает нежелательно или невозможно мен ть частоту источника.in measurement technology it is often necessary to determine the sign of the difference between two close sound frequencies. So far, this has been done either with an auxiliary device, tuned first to one, then to another frequency, or by changing the frequency of one of the sources. The first method is disadvantageous in that it is necessary to have an auxiliary device, and the second because it is undesirable or impossible to change the frequency of the source.

Описываемый способ основан на кажупдемс  изменении частоты одного из источников, происход ш;ем без изменени  его настройки. Энерги  сравниваемых частот при этом превращаетс  в звуковую, - использу  это, уравнивают амплитуды сравниваемых звуков так, чтобы обнаружить между ними биени .The described method is based on the change in the frequency of one of the sources, which occurs w; I eat without changing its setting. The energies of the compared frequencies are then converted into sound, by using this, they equalize the amplitudes of the compared sounds so as to detect beats between them.

Измен   на короткое врем  рассто ние от одного из источников до наблюдател , получают кажущеес  изменение частоты звука (эффект Допплера). За это врем  кажуща с  разность частот изменитс  - по направлению этого изменени  и определ ют, кака  из сравниваемых частот больще или меньще.Changing for a short time the distance from one of the sources to the observer, an apparent change in the frequency of the sound is obtained (the Doppler effect). During this time, the apparent frequency difference will change — in the direction of this change, it is determined which of the compared frequencies is larger or smaller.

Потребна  скорость перемещени  лежит в доступных пределах. Если источники нельз  перемещать, то перемещаетс  сам наблюдатель (или перемещают, например, микрофон), наход щийс  между источниками . Способ пригоден и в том случае, когда частота одного источника близка во второй или третьей гармонике второго источника.The required speed of movement lies within the available limits. If the sources cannot be moved, the observer himself moves (or move, for example, a microphone) located between the sources. The method is also suitable in the case when the frequency of one source is close in the second or third harmonic of the second source.

В Случае сравнени  двух радиочастот, отли чающихс  на весьма малую частоту, токи радиочастот демодулируют и получают звуковые колебани , различающиес  на Д гц. После этого описанным выще способом легко определить знак разности звуковых колебаний и радиочастот .In the case of comparing two radio frequencies that differ at a very low frequency, the radio frequency currents demodulate and receive sound vibrations that differ by D Hz. After that, using the method described above, it is easy to determine the sign of the difference in sound vibrations and radio frequencies.

РР РП - / 1РР РП - / 1

-,.;-;;.,.-,,| limai i.if i-jj.ig О-,.; - ;;., .- ,, | limai i.if i-jj.ig O

i ::iim- (оЛ;:л| ;;дi :: iim- (oL;: l | ;; d

В ВШ нкп--В ВШ нкп--

№ 61177- 2 -No. 61177-2 -

Предмет изобретени Subject invention

Способ определени  знака малой разности двух частот путем использовани  эффекта Допплера, отличающийс  тем, что обе частоты преобразуют в звуковые и, передвига сь с достаточной скоростью по отношению к одному из источников звука, наблюдают за характером изменени  биений между частотами.The method of determining the sign of a small difference in two frequencies by using the Doppler effect, characterized in that both frequencies are converted into sound and, moving with sufficient speed relative to one of the sound sources, monitor the nature of the change in the beats between the frequencies.

SU2450D 1940-12-16 1940-12-16 The method of determining the sign of the small difference of two frequencies SU61177A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2450D SU61177A1 (en) 1940-12-16 1940-12-16 The method of determining the sign of the small difference of two frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2450D SU61177A1 (en) 1940-12-16 1940-12-16 The method of determining the sign of the small difference of two frequencies

Publications (1)

Publication Number Publication Date
SU61177A1 true SU61177A1 (en) 1941-11-30

Family

ID=48242654

Family Applications (1)

Application Number Title Priority Date Filing Date
SU2450D SU61177A1 (en) 1940-12-16 1940-12-16 The method of determining the sign of the small difference of two frequencies

Country Status (1)

Country Link
SU (1) SU61177A1 (en)

Similar Documents

Publication Publication Date Title
ATE67858T1 (en) IMMUNOLOGICAL TEST PROCEDURE.
CH290943A (en) Apparatus for generating mechanical vibrations at ultrasonic frequencies.
SU61177A1 (en) The method of determining the sign of the small difference of two frequencies
CH271987A (en) Device for the transmission of electrical oscillations of acoustic frequency.
CH253885A (en) Support for the presentation of wristwatches.
CH164583A (en) Device for transforming electric oscillations into sound vibrations or vice versa.
SU75250A1 (en) The method of desulfurization and dephosphorization of steel
GB860237A (en) Improvements in and relating to echo sounding and echo ranging apparatus
SU75266A1 (en) The method of steel deoxidation
CH245730A (en) Device for the stereophonic recording of sound vibrations.
SU50434A1 (en) Generator device
SU77708A2 (en) Method for studying bodies by elastic or electromagnetic waves
SU75437A1 (en) Method of obtaining weight for gramophone records
SU69880A1 (en) The method of obtaining acetamide
SU75222A2 (en) The method of obtaining pipes
SU72116A1 (en) Method of making iron films
FR1011634A (en) High frequency signal converter system
FR1059589A (en) Metal trim for filing cabinets and other applications, and its fixing method
CH278793A (en) Method for the transmission of signals.
FR982383A (en) Super-regenerative system for the transmission of wave signals
JPS51112377A (en) Signal analysis device
FR894101A (en) High frequency oscillation transmission system
FR1329298A (en) Equipment for the transmission of signals by modulated oscillations at constant amplitude
GB532028A (en) Improved apparatus for cutting sound records on sound tapes
FR22578E (en) Apparatus for discovering the approach and locating the direction of an underwater or aerial sound source