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Discussion Groups

Discussion Groups | | Thanks guys!!!

Thanks guys!!! - eileeniicg - Sep 23 21:04:00 2003

Oh my, look what i just saw. woo hoo! I think i'm going to cry. (**seriously!!!**) It brought tears to my eyes when i saw the register contents. >call 100 P-0100 Y-FFFF X-FFFB A-80 B-FF C-D8 S-0041 >md 100 0100 86 80 B7 01 10 39 F9 10 20 F6 FF FF FF FF FF FF 9 0110 80 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF Alrighty, now i can actually *START* my senior project. Wow, this is gonna be a long 2.5 months Thanks everyone!!! =D For those that care, my senior project is going to be an oxygen delivery system for patients that can't breathe on their own. Right now, patients are hooked up to, what is called an oximeter, and that is pretty much a sensor that reads how much oxygen they're getting (they call it oxygen saturation). If their reading falls above or below a certain oxygen saturation, the oximter will beep, which alerts the nurse to manually adjust the oxygen valve (either open it more or close it more) until the appropriate oxygen saturation is met (i.e 98% oxygen saturation). What we hope to accomplish is making this whole system self-regulating, wherein we use the mcu to read the oximeter reading (still working on how to tap into the oximeter), and depending on that reading, we open or close (or do nothing) the oxygen valve by means of a solenoid that is hooked up to the tank. I'll keep you posted on our progress. Eileen

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Re: Thanks guys!!! - Author Unknown - Sep 24 7:36:00 2003

In a message dated 9/23/03 10:05:57 PM Eastern Daylight Time, writes: What we hope to accomplish is making this whole system self-regulating, wherein we use the mcu to read the oximeter reading (still working on how to tap into the oximeter), and depending on that reading, we open or close (or do nothing) the oxygen valve by means of a solenoid that is hooked up to the tank. I'll keep you posted on our progress. ==================================== If you want to put software in an airplane, you need to have RTCA DO-178B certification to some safety level. Seems like there should be a very strict set of standards, requirements etc for life critical firmware..... I wouldnt want 'Susies first hand coded assembler program' running my pacemaker. It would only work till I heated my coffee in the microwave the next morning then I'd go into an infinite loop fibrillation for a few minutes, then a white light appears, and a voice says 'Bob... walk to the light'.... then suddenly I knew what all those swamis meant when they told me about nirvana..... [Non-text portions of this message have been removed]

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Re: Thanks guys!!! - Paul B. Webster - Sep 24 8:00:00 2003

On Wed, 2003-09-24 at 12:04, eileeniicg wrote: > For those that care, my senior project is going to be an oxygen > delivery system for patients that can't breathe on their own. Keywords: Fail Safe, Redundancy, Default. Perhaps not NASA. :-( If you, by way of test, remove the MCU from its socket, an alarm must sound and the valve setting not change or at the very least, not be able to close. Interface with the oximeter should be interesting, because that is usually part and parcel of the monitor, which likely has a compound output datastream - possibly even as Ethernet. Unless you're using a "raw" oximeter module from somewhere, as I daresay you may. Naturally, one of the more significant oximeter status messages to be dealt with, is "Probe off". > until the appropriate oxygen saturation is met (i.e 98% oxygen > saturation. You didn't mention the "back-titration" algorithm. Minor detail. You are going to learn a bit of control (loop) theory. > we open or close (or do nothing) the oxygen valve by means of a > solenoid that is hooked up to the tank. You mean stepper motor? -- Cheers, Paul B.

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