Velocity profile measurement of solid particles using LED as a light source
Optical sensors have been widely available and used in medical applications and industries for decades. Its design comes in a wide range of varieties where each are tailored based on its type, use, size, nature of investigated materials etc. In this work, we focus on the development and investigatio...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6543/ http://eprints.uthm.edu.my/6543/1/1570024509.pdf |
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| Summary: | Optical sensors have been widely available and
used in medical applications and industries for decades. Its
design comes in a wide range of varieties where each are tailored
based on its type, use, size, nature of investigated materials etc. In
this work, we focus on the development and investigation of an
optical sensing module, which uses Light Emitting Diode (LED)
as the light source and LED photosensor as detector. This sensor
is to measure the velocity of a solid particle in a gas flow inside a
closed pipe. Various factors such as power dissipation,
wavelength of the light source, switching time and cost are
considered in the design process of this sensor. The cross
correlation technique is used to determine the flow rate where
small particles were introduced in a natural gas flow and they
went through two distanced sets of sensor module. The LED
beam source in the first set of sensor will be scattered when the
particle crosses it then the corresponding photodetector will
collect the light signal received and generates a pulse signal. The
second pulse signal is generated when the particle crosses the
second set of sensor after an interval of time. The time interval
measured is used to calculate the velocity of the flow. An analysis
of the received pulse signals is made to determine the best
configurations of the sensors. At the end of this study, we were
able to develop a simple, working, and cost effective sensing
module. |
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