发明名称 |
VELOCITY MEASUREMENT SYSTEM |
摘要 |
A sonic-type fluid flow measuring system wherein reflections or echoes of a burst (103) of ultrasonic energy from an ultrasonic acoustic emitter (9a) are sensed and typically comprise a number of frequencies representative of a number of discrete velocities of flow in a volume of fluid. A receiver transducer (13a) is gated to receive echoes from a selected volume of fluid (104) at a selected distance from a transducer (13a). Thereafter, this time domain signal sample is converted to a frequency domain sample whereby the presence and magnitude of each frequency component, or velocity component, is isolated, this being typically done by what is known as a Fast Fourier Transform unit, obtaining a frequency domain waveform representative of average flow velocity. |
申请公布号 |
WO9303333(A1) |
申请公布日期 |
1993.02.18 |
申请号 |
WO1992US06014 |
申请日期 |
1992.07.20 |
申请人 |
ADS ENVIRONMENTAL SERVICES, INC. |
发明人 |
PETROFF, ALAN, M.;FULLERTON, LARRY, W. |
分类号 |
G01F1/00;G01F1/66;G01P5/24;G01S15/50;G01S15/58 |
主分类号 |
G01F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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