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Measuring breathing patterns

D

damn

Jan 1, 1970
0
Hi all,

I suffer from somewhat bad sleep, most likely because of an allergy.
I very much would like to monitor my breathing at night to get a relation
in between bad sleep and breathing problems.

I was thinking of doing this by measuring the temperature of the air
getting out of mounth and/or nose.

This requires a fast and accurate temperature sensor. The output of this
sensor will be connected to a A/D board connected to my PC.


Does anyone have any hints on what temperature sensor to use?


Thank you!



B.
 
R

Rich Grise

Jan 1, 1970
0
Hi all,

I suffer from somewhat bad sleep, most likely because of an allergy.
I very much would like to monitor my breathing at night to get a relation
in between bad sleep and breathing problems.

I was thinking of doing this by measuring the temperature of the air
getting out of mounth and/or nose.

This requires a fast and accurate temperature sensor. The output of this
sensor will be connected to a A/D board connected to my PC.

Does anyone have any hints on what temperature sensor to use?

Thank you!

Why not use one of those strap thingies? It's a band you wrap around
your chest, with a sensor that detects when it stretches when you
inhale.

Or, for temperature, look up "thermistor".

Good Luck!
Rich
 
D

damn

Jan 1, 1970
0
Why not use one of those strap thingies? It's a band you wrap around
your chest, with a sensor that detects when it stretches when you
inhale.

Or, for temperature, look up "thermistor".

Good Luck!
Rich

Well, for one, I'd like to see what happens with mount-breathing versus
nose-breathing. The allergy blocks my nose, so I'd like to see how that
interacts.

Thermistor: thx for the info!



B.
 
B

Bob Monsen

Jan 1, 1970
0
Hi all,

I suffer from somewhat bad sleep, most likely because of an allergy.
I very much would like to monitor my breathing at night to get a relation
in between bad sleep and breathing problems.

I was thinking of doing this by measuring the temperature of the air
getting out of mounth and/or nose.

This requires a fast and accurate temperature sensor. The output of this
sensor will be connected to a A/D board connected to my PC.


Does anyone have any hints on what temperature sensor to use?

You can get a test done, where they wire you up and keep track of all of
this while you sleep. It is used to diagnose apnea, which is fairly
dangerous over a period of time.

One other thing to worry about is carpeting in the bedroom, and not
washing your bedding often enough. The medical community recommends
washing in 140F water every week. They also recommend getting rid of
carpeting, and replacing it with a hard floor of some kind, which will not
harbor mites, or the bacteria they themselves harbor. Apparently, this
bacteria can cause breathing problems even in non-asthmatics. (I was
just reading about all this while waiting in my doctor's office... ;)

--
Regards,
Bob Monsen

"Physiological experiment on animals is justifiable for real
investigation, but not for mere damnable and detestable curiosity."
-- Charles Darwin
 
J

JeffM

Jan 1, 1970
0
damn said:
I very much would like to monitor my breathing at night
to get a relation in between bad sleep and breathing problems.
I was thinking of doing this by measuring the temperature of the air
getting out of mounth and/or nose.
B.

No need to reinvent the wheel (badly):
http://www.google.com/search?q=define:plethysmograph

http://groups.google.com/group/sci..../f710a6cf6d46de83?q=Inductance-plethysmograph
http://www.google.com/images?q=Inductive-plethysmograph
http://www.google.com/images?q=Inductance-plethysmograph
http://www.google.com/search?q=Inductive-plethysmograph
http://www.google.com/search?q=Inductance-plethysmograph
 
M

Mark

Jan 1, 1970
0
A tiny bead thermistor works fine for this putpose - Use a resistor and the
thermistor as a voltage divider feeding an adc from the center and using the
driving voltage to the divider as the reference voltage to make it
ratiometric. Then devise an algorithm to detect the increase in temperature
as you exhale.

You don't need precision because you don't care what the actual temperature
is, only the change. I use this technique in a product I sell to monitor
respiration in anesthetized animals and using 10 bits I can very reliably
detect breaths in animals ranging from tiny kittens to 250 pound St.
Bernards.

Mark
 
C

Charles Schuler

Jan 1, 1970
0
No need to reinvent the wheel (badly):

How true that is. Many folks stumble upon a concept and think that it is
unique.
 
D

damn

Jan 1, 1970
0
Very nice stuff, only it doesn't register if you're doing nose-breathing
or forced mouth-breathing.
 
D

damn

Jan 1, 1970
0
had three of those studies done, so that's pretty familiar to me :)

the stuff you mention about the mites indeed confirms what my doctor
advised me, next to buying special anti-mite bedstuff.

thx!

B.
 
G

Geoff

Jan 1, 1970
0
//cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7576451431&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1[/url]


thank you, but heartbeats have nothing to do with breathing I think.

The URL does not work unfortunately.

Bart

Try this. I un-wrapped the URI but if your news client auto-wraps it
will still fail. When that happens I copy-paste the broken URI into a
text editor, fix it and copy that into a browser.
 
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