Posted by(작성하신 분) MaxMet Inc. ( May 02, 2001 at 19:21:32: )
In Reply to(원문) : Flow measurement by ultrasound
posted by(원문 작성자) : Liz Bond-Blanch on March 30, 2001 at 07:56:51:
: Could anybody tell me where to find any information on "Flow measurement by ultrasound" for a college project. I am currently in second year studying physics in Dublin, Ireland.
: Thanks, Liz
Dear Liz,
There are some flow meters by ultrasound.
Ultrasonic flow meters
- Doppler type clamp-on ultrasonic flow meter
Uses acoustic Doppler freqency to evaluate the
flow velocity, i.e., flow rate
- Doppler type insertion flow meter (or velocimeter)
Same as above, but uses to measure the point velocity of
flow medium, i.e. its integration gives the flow rate
- Transit time ultrasonic flow meter
widely applied for the measurement of liquid flow as
well as gas flow, has either intrusive clamp-on type
as well as wet application(transducers are placed in
the drilled hole of the pipe, the transducers face the
fluid flow medium)
- Cross correlation ultrasonic flow meter
uses the cross function analysis of the ultrasonic beams
either amplitude or frequency modulated signals can be
employed to evaluate the time of the flight of flow medium
especially used for the measurement of multiphase flow
- Ultrasonic tomographic flow meter
used for the measurement of multiphase flow
- Doppler Acoustic Profiler
Used to identify the velocity profile of the
flow field
Also there are and will be many applications by employing
the ultrasonic waves. Please refer to the references which
are available in the websites and various company catalogs
including MaxMet's.
Regards,
MaxMet Inc.