MAF sensors

[Bruno!]

On Thu, 9 May 1996, Mark Pitts wrote:

> Anybody interested in playing with an ultrasonic, dop shift MAF sensor?

What about hacking one together? I just happened to do a bit of reading 
into mass flow, and the idea behind these is quite simple, like as you 
said, working on the doppler shift. it looks something like below.

                 \tx1\rx2\
==================         =================
                                
------> air flow


=========================         ===========
                           \rx1\tx2\ 

one sound wave is opposed by the flow (pair #2), reducing speed in moving 
air, while the other is assisted (pair #1).  

you should be able to find quite a few journal articles, books, under the 
subjects: anemomtery, gas flow, flow measurement, etc. 

		Bruno.  (u933234 at student.canberra.edu.au)

    "A sewer rat might taste like pumpkin pie, but I wouldn't know cos I 
                    don't eat the filthy muthaf***a"