There are also thermal accelerometers, which have a little bubble of fluid (air, probably?) with a heater surrounded by temperature sensors; the warmer (and therefore less dense) part of the fluid moves in the direction of acceleration. I don't know if these are any more accurate than the types you mention; I'm just mentioning them for completeness. :) I think their main advantage is shock/impact resistance.
-- Wim Lewis , Seattle, WA, USA. PGP keyID 27F772C1 "We learn from history that we do not learn from history." -Hegel
50000g (fluid based) vs. 5000g (capacitive based). I think production cost is more of an issue.
I presume we're talking about an explosive-based mechanism to get to the 50000 g values.
Yes, you would likely rip everything out of the PCB with 50K G anyway. Ususally, you don't care much about the device after impact, as in ICBMs.
Artillery shells experience 10,000 to 15,000 Gs at firing, and they have put some pretty complex electronics in them.
Mark Borgerson
s;
e. :)
drop a accelerometer 3 feet on a hard surface will get you 10,000+ g's and kill most mems accelerometers
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.