scholarly journals Hematocrit-insensitive Absolute Blood Flow Rate Measurement in 0.5-mm-diameter Flow Channel Using MEMS-based Laser Doppler Velocimeter with Signal Modification for Detecting Beat Frequency from Broad Power Spectrum

2018 ◽  
Vol 30 (12) ◽  
pp. 3009
Author(s):  
Nobutomo Morita ◽  
Wataru Iwasaki ◽  
Hirofumi Nogami ◽  
Fumiya Nakashima ◽  
Eiji Higurashi ◽  
...  
Keyword(s):  
Blood Flow ◽  
Power Spectrum ◽  
Flow Rate ◽  
Beat Frequency ◽  
Blood Flow Rate ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Signal Modification

Cryogenic flow rate measurement with a laser Doppler velocimetry standard

2018 ◽  
Vol 29 (3) ◽  
pp. 034009 ◽  
Author(s):  
R Maury ◽  
A Strzelecki ◽  
C Auclercq ◽  
Y Lehot ◽  
S Loubat ◽  
...  
Keyword(s):  
Flow Rate ◽  
Laser Doppler Velocimetry ◽  
Laser Doppler ◽  
Doppler Velocimetry ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Cryogenic Flow

scholarly journals 506 Effect of bending angle of a blood flow meter using a curved pipe on flow rate measurement

2014 ◽  
Vol 2014.22 (0) ◽  
pp. 9-10
Author(s):  
Takumi SAITO ◽  
Ryo KOSAKA ◽  
Daisuke SAKOTA ◽  
Masahiro NISHIDA ◽  
Yasuo KAWAGUCHI ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Rate ◽  
Rate Measurement ◽  
Flow Rate Measurement ◽  
Flow Meter ◽  
Bending Angle ◽  
Curved Pipe

Traceable Flow Rate Measurements With a Very Low Uncertainty Using Laser Doppler Anemometry

2017 ◽  
Author(s):  
Markus Juling ◽  
Jonas Steinbock ◽  
Andreas Weissenbrunner
Keyword(s):  
Flow Rate ◽  
Laser Doppler Anemometry ◽  
Volume Flow Rate ◽  
Primary Standard ◽  
Volume Flow ◽  
Laser Doppler ◽  
Maximum Deviation ◽  
Flow Profile ◽  
Rate Measurement ◽  
Flow Rate Measurement

Precise volume flow rate measurements are very important for various industrial applications. Here, one problem is that the service conditions of a flow meter used in the field differ significantly from the conditions present during calibration. The working conditions such as the pressure, the temperature and the flow profile greatly increase the uncertainty of the flow rate measurement. To address this problem, a new laser-optical flow rate standard (LFS) was developed at the Physikalisch-Technische Bundesanstalt (PTB) that allows flow meters to be calibrated on site, thus greatly reducing the uncertainty of the flow rate measurement. For the LFS, the velocity profile within the pipe is measured with laser Doppler anemometry (LDA). The profile is then integrated to calculate the volume flow rate. Various improvements to LDA have made it possible to measure the flow rate with an uncertainty of less than 0.15 % (k = 2). A comparison of the LFS with the primary standard for thermal energy at PTB, which has an uncertainty of less than 0.04 % (k = 2), revealed a maximum deviation of 0.07 % for Reynolds numbers from 105 to 106, thus verifying the uncertainty of the LFS.

scholarly journals Effect of Kampo Medicines on the Peripheral Blood Flow Rate of Betamethason-Induced Oketsu Syndrome Mice by Laser Doppler Flow Meter

2004 ◽  
Vol 124 (6) ◽  
pp. 365-369 ◽  
Author(s):  
Joji UEDA ◽  
Etsuko OHYA ◽  
Kozue UDAGAWA ◽  
Akiko HARA ◽  
Mai FUKUI ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Rate ◽  
Peripheral Blood ◽  
Blood Flow Rate ◽  
Laser Doppler ◽  
Peripheral Blood Flow ◽  
Flow Meter ◽  
Laser Doppler Flow ◽  
Doppler Flow
Sign in / Sign up

Export Citation Format

Share Document