Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.
-
D_Hall
- Staff Sergeant 5
- Posts: 1924
- Joined: Thu Feb 07, 2008 7:37 pm
- Location: SoCal
- Has thanked: 8 times
- Been thanked: 44 times
Tue Jun 10, 2008 7:32 pm
jimmy101 wrote:D_Hall wrote:
And then there's the issue of recording their output at sufficiently high data rates to actually make use of their output....and that's even more expensive than the gauge.
Naaah. Dig up a retired PC, like an old Win98 box. You now have all the hardware, and most of the software, to record the transducer output at more than adequate sample rates. Two channels, 16-bit resolution per channel, ~44,000 samples/second.
I'm happy to be corrected but....
I'm not aware of you having recorded actual pressure readings from a pressure transducer. Your own page indicates the piezo-electric transducers you use indicate pressure rate of change (1st derrivative of pressure), but that's a far cry from pressure.
-
SpudFarm
- First Sergeant 3
- Posts: 2571
- Joined: Sat Nov 04, 2006 9:39 am
- Location: Norway Trondheim area
Wed Jun 11, 2008 10:52 am
i may do that but i will use a small chamber of 2" hydraulic fittings and higher mixes (21x)
that is when i get my money. that is not that easy on my age but i got $60 to tear a phone book in half
mabe i can try to walk around and ask people for jobs in the vacation.
"Made in France"
- A spud gun insurance.
-
jimmy101
- Sergeant Major 2
- Posts: 3206
- Joined: Wed Mar 28, 2007 9:48 am
- Location: Greenwood, Indiana
- Has thanked: 6 times
- Been thanked: 18 times
-
Contact:
Wed Jun 11, 2008 12:18 pm
D_Hall wrote:jimmy101 wrote:D_Hall wrote:
And then there's the issue of recording their output at sufficiently high data rates to actually make use of their output....and that's even more expensive than the gauge.
Naaah. Dig up a retired PC, like an old Win98 box. You now have all the hardware, and most of the software, to record the transducer output at more than adequate sample rates. Two channels, 16-bit resolution per channel, ~44,000 samples/second.
I'm happy to be corrected but....
I'm not aware of you having recorded actual pressure readings from a pressure transducer. Your own page indicates the piezo-electric transducers you use indicate pressure rate of change (1st derrivative of pressure), but that's a far cry from pressure.
Agreed 100% but that wasn't my point. The AD converter and data recorder in a sound card is more than adequate for the data
accquistion. The transducer is a different matter.
IF you had a suitable transducer and, if needed an amplifier, then the soundcard would be more than adequate to digitize and record the signal.
In other words "
And then there's the issue of recording their output at sufficiently high data rates to actually make use of their output....and that's even more expensive than the gauge. " Is what I was disagreeing with. A PC soundcard has sufficient sample rate for this application. A 50mS combustion time would give 2400 data points. That should be more than adequate.
