A carotid imaging system utilising continuous-wave Doppler-shift ultrasound and real-time spectrum analysis

1978 ◽  
Vol 16 (6) ◽  
pp. 739-744 ◽  
Author(s):  
B. A. Coghlan ◽  
M. G. Taylor
Keyword(s):  
Real Time ◽  
Spectrum Analysis ◽  
Doppler Shift ◽  
Continuous Wave ◽  
Imaging System ◽  
Time Spectrum ◽  
Continuous Wave Doppler

Imaging the Carotid Bifurcation with Continuous-Wave Doppler-Shift Ultrasound and Real-Time Spectral Analysis

1980 ◽  
Vol 58 (2) ◽  
pp. 28P-28P
Author(s):  
M. G. Beasley ◽  
R. R. Lewis ◽  
B. A. Coghlan ◽  
M. G. Taylor ◽  
R. G. Goslino
Keyword(s):  
Spectral Analysis ◽  
Real Time ◽  
Doppler Shift ◽  
Continuous Wave ◽  
Carotid Bifurcation ◽  
Continuous Wave Doppler

Speed Synchronization System of Master-Slave Motor Based on Repetitive Control

2014 ◽  
Vol 644-650 ◽  
pp. 523-526
Author(s):  
Yun Ling ◽  
Huan Chen ◽  
Fei Li
Keyword(s):  
Real Time ◽  
Spectrum Analysis ◽  
Repetitive Control ◽  
Speed Control ◽  
Time Spectrum ◽  
Mechanical Resonance ◽  
Synchronization System ◽  
Speed Controller ◽  
Control Scheme ◽  
Magnet Wire

In the wrapping process of magnet wire, as the haulage speed of master motor varies periodically, it is difficult for slave wrapping motor to track master motor due to the mechanical resonance, which destabilizes the wrapping pitch. In the proposed system, the synchronization speed control scheme of master-slave motor based on repetitive control compensation is employed. In the process of control, real-time spectrum analysis of the haulage speed is given, which can be used to adjust the parameters of wrapping speed controller adaptively with the acquired characteristic information of the mechanical resonant. Simulation shows that wrapping speed can track haulage speed well in the proposed system, and the maximum tracking synchronous deviation can be reduced to 56% of that in the system without repetitive control.

Real time spectrum analysis

1983 ◽  
Vol 216 (1-2) ◽  
pp. 191-203 ◽  
Author(s):  
A. Blunden ◽  
D.G. O'Prey ◽  
W.H. Tait
Keyword(s):  
Real Time ◽  
Spectrum Analysis ◽  
Time Spectrum

Shear-Layer Detection in Poststenotic Flow by Spectrum Analysis of Doppler Signals

1988 ◽  
Vol 110 (4) ◽  
pp. 320-325 ◽  
Author(s):  
T. Tamura ◽  
A. Fronek
Keyword(s):  
Shear Layer ◽  
Spectrum Analysis ◽  
Doppler Shift ◽  
Continuous Wave ◽  
Reverse Flow ◽  
Separated Flow ◽  
Sample Volume ◽  
Doppler Spectrum ◽  
Doppler Signals ◽  
Shift Frequency

Spectrum analysis of the Doppler signals was performed 0.5 tube diameters downstream from an axisymmetric constriction with an area reduction of 80 percent in steady flow at a jet Reynolds number of 2840. Both pulsed and continuous wave (CW) Doppler spectra showed significant reverse flow components in the separated flow. The pulsed Doppler spectra exhibited sudden changes when the sample volume crossed the shear layer between the center jet and the separated flow. A power spectrum equation was theoretically derived from continuity of flow to define the Doppler shift frequency for the shear layer velocity. The CW Doppler spectrum showed a minimum spectrum density at a frequency which equalled the shear layer Doppler shift frequency derived from the equation. The pulsed spectra exhibited the sudden changes at the same frequency as well.

Real-Time Spectrum Analysis in Microstrip Technology

2001 ◽  
Author(s):  
M. A. G. Laso ◽  
T. Lopetegi ◽  
M. J. Erro ◽  
M. Castillo ◽  
D. Benito ◽  
...  
Keyword(s):  
Real Time ◽  
Spectrum Analysis ◽  
Time Spectrum ◽  
Microstrip Technology
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