In
order to find out what is the flow sensor, we need to have a basic
understanding of the word “ flow”. It is defined as the rate (volume or area
per unit time) at which a substance travels through a given cross section and
is characterized at specific temperatures and pressures. I understand that this
rate can appear in any place or field to identify the volume with given unit
time or the time with given area. Therefore, an instrument has been provided to
measure the flow called flow meter. It includes the main components, which are
the sensor, transmitter and signal processor. Flow sensor measures the flow
through a given area by using electromagnetic fields and acoustic waves.
Nowadays, the most common tool to measure flow is the flow senor depends on its
accuracy and low cost, so the flow sensors have been widely used in chemical
and petroleum industries.
I
found one article discussed the mass airflow sensor. I’m interested in this
topic because it tells me how the actual airflow sensor finds out the total of
air entering a fuel-injected internal engine in a car. The airflow sensor can
find out the amount air passing the aperture in a given time, and this airflow
mass information is necessary to deliver the correct amount of fuel mass to the
engine. Basically, my understanding is the airflow sensor tells the computer to
adjust how much fuel need to be added into the motor and create the correct
internal combustion by calculating the volume inside aperture space. Besides
that, the airflow sensor not only testifies the airflow rate, but also
determines the temperature of the air. This helps to increase the engine safety
factors by displaying the signal to show what is ideal temperature rate.
Most
of flow sensors are small and easy to operate. The benefits for the sensor are
its accuracy and low initial cost (some have a little high maintenance cost).
Consequently, flow sensor has become a major component in many economic success
or failure of any given process. Most importantly, accurate flow sensors ensure
the safety of the process.
Source:
“Flow Sensors” Ashwini Miryala, Kyle
Scarlett, Zachary Zell, Brandon Kountz (Spetember 14, 2006)
“What is Mass Air Flow Sensor”-Slide Sharehttp://www.slideshare.net/BuyAutoParts/what-is-a-mass-air-flow-sensor
Comments:
To Signe:
I liked the pictures you provided in the
blog, and I’m also interested in the CFD fluid flows. My question is how this
CFD dividing the space in a BIM model and what’s the accuracy for this system
if the fluid flow changes frequently.
To Carvalho:
After reading your blog, I just realized that
there are a lot of movement sensors around us, which bring us convenience and
safety. I believe that the movement sensor give the benefits to those
handicapped and elderly people.
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