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 frequenciesInfo
- 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
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.
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) |
-
1940
- 1940-12-16 SU SU2450D patent/SU61177A1/en active
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