SU532819A1 - The method of measuring the velocity of the medium - Google Patents
The method of measuring the velocity of the mediumInfo
- Publication number
- SU532819A1 SU532819A1 SU2152055A SU2152055A SU532819A1 SU 532819 A1 SU532819 A1 SU 532819A1 SU 2152055 A SU2152055 A SU 2152055A SU 2152055 A SU2152055 A SU 2152055A SU 532819 A1 SU532819 A1 SU 532819A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- velocity
- medium
- measuring
- spectrum
- doppler signal
- Prior art date
Links
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
(54) СПОСОБ ИЗМЕРЕНИЯ СКОРОСТИ ПЕРЕМЕЩЕНИЯ СРЕДЫ(54) METHOD OF MEASURING THE VELOCITY RATE OF THE ENVIRONMENT
33
Выход генератора гармонических колебаний 1 подключен к фокусирующему излучателю ультразвуковых колебаний 2 и ко входу смесител 3, к которому подключен анализатор снектра 4.The output of the harmonic oscillator 1 is connected to the focusing emitter of ultrasonic oscillations 2 and to the input of the mixer 3, to which the analyzer of the spectr 4 is connected.
Устройство работает следующим образом. Сферический излучатель 2 создает фокусированную волну в исследуемой среде и вследствие ее нелиней кого взаимодействи со средой в области фокуса образуетс теплова или кавитационна метка. Отраженный от этой метки сигнал поступает на тот же излучитель 2, который одновременно выполн ет роль приемника ультразвуковых колебаний.The device works as follows. The spherical emitter 2 creates a focused wave in the medium under study and, due to its non-interaction with the medium, a heat or cavitation mark is formed in the focus area. The signal reflected from this tag goes to the same radiator 2, which simultaneously performs the role of a receiver of ultrasonic vibrations.
Величина доплеровского сигнала, поступающего на приемник ультразвука, зависит от угла ct. Поэтому доплеровский сигнал на выходе смесител имеет некоторый спектр при посто нной скорости метки. На фиг. 2 показана форма спектра доплеровского сигнала на экране анализатора, когда сС О, где fg определ етс по формуле (1) при о1 0; f дд величина доплеровского сигнала, определ ема по формуле (1) при а «макс. При изменении величины скорости весь спектр целиком смещаетс по оси частот. При изменении направлени вектора скорости форма спектра мен етс .The magnitude of the Doppler signal arriving at the ultrasound receiver depends on the angle ct. Therefore, the Doppler signal at the mixer output has a certain spectrum at a constant tag speed. FIG. Figure 2 shows the shape of the Doppler signal spectrum on the analyzer screen when cC is 0, where fg is determined by formula (1) with o1 0; f dd is the value of the Doppler signal determined by formula (1) with a «max. With a change in the magnitude of the velocity, the entire spectrum is shifted entirely along the frequency axis. As the direction of the velocity vector changes, the shape of the spectrum changes.
На фиг. 3 показана форма спектра доплеров ского сигнала, когда оС J. Максимум смещаетс к середине огибающей спектр. Смещение максимума спектра происходит из-за того, что индикатриса рассе ни метки не зависит от направлени вектора скорости. По величине частоты д между частотой FIG. Figure 3 shows the shape of the Doppler signal spectrum when ° C J. The maximum is shifted to the middle of the spectrum envelope. The shift of the maximum of the spectrum occurs due to the fact that the indicatrix of the scattering of the mark does not depend on the direction of the velocity vector. The magnitude of the frequency d between the frequency
максимума и максимальной частотой смещени определ ют угол у , а по величине «макс - величину вектора скорости.the maximum and maximum frequency of displacement determine the angle y, and the value of max is the magnitude of the velocity vector.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2152055A SU532819A1 (en) | 1975-07-04 | 1975-07-04 | The method of measuring the velocity of the medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2152055A SU532819A1 (en) | 1975-07-04 | 1975-07-04 | The method of measuring the velocity of the medium |
Publications (1)
Publication Number | Publication Date |
---|---|
SU532819A1 true SU532819A1 (en) | 1976-10-25 |
Family
ID=20625239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU2152055A SU532819A1 (en) | 1975-07-04 | 1975-07-04 | The method of measuring the velocity of the medium |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU532819A1 (en) |
-
1975
- 1975-07-04 SU SU2152055A patent/SU532819A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2770795A (en) | Acoustic log | |
ES8104578A1 (en) | Duplex ultrasonic imaging system with repetitive excitation of common transducer in Doppler modality. | |
KR850001680A (en) | Ultrasonic Fluid Observation Device | |
GB1301213A (en) | Apparatus for measuring the range and velocity of a moving body | |
SU532819A1 (en) | The method of measuring the velocity of the medium | |
US4399387A (en) | Ultrasonic wave transducer | |
US2871460A (en) | Velocity measuring apparatus | |
US3891960A (en) | Doppler sonar system | |
CA1150815A (en) | Parametric array doppler sonar apparatus | |
RU96100918A (en) | DEVICE | |
SU838402A1 (en) | Device for measuring propagation rate of ultrasound vibrations in moving sheet material | |
US3293594A (en) | Radiating energy detection system | |
RU835234C (en) | Acoustic method of measuring wind velocity | |
SU922622A1 (en) | Ultrasonic separated-joint finder | |
SU1733999A1 (en) | Ultrasound converter | |
SU593135A1 (en) | Device for measuring ultrasound speed | |
JPS604129Y2 (en) | Ultrasonic current meter for casting nets | |
SU1698741A1 (en) | Method of determining the acoustic waves absorption coefficient | |
SU580507A1 (en) | Arrangement for measuring liquid and gas flow velocities | |
SU836579A1 (en) | Piezotransducer | |
SU466419A1 (en) | Instrumentation waveguide ultrasound receiver | |
SU468152A1 (en) | Device for measuring the propagation velocity and the absorption coefficient of ultrasound | |
SU980254A1 (en) | Saw-based ultrasonic delay line | |
SU1460621A1 (en) | Ultrasound velocity meter | |
SU1366879A2 (en) | Device for measuring geometric dimensions of parts |