## Re: [Gumstix-users] use of an accelerometer.

 Re: [Gumstix-users] use of an accelerometer. From: Rob Barnes - 2007-08-01 00:39:15 Attachments: Message as HTML ```Here is a real world example of how to use an accelerometer to monitor the speed of your car: http://forums.vwvortex.com/zerothread?id=3362586 This guy actually uses the accelerometer embedded in the Wiimote. -RobB On 7/27/07, Christopher Gilbert wrote: > > These problems are all solvable with a little bit of calculus. > > Provided that your accelerometer will read negative with you slow down, > keeping a log of accelerometer readings should be enough. > > Let's say you have a graph of your accelerometer readings. The area under > the curve (between it rather, because it will drop negative as well) will be > your difference in speed between any two intervals. By starting at a known > speed, you can then accurately (as far as numbers are concerned) form a > graph of your speed. Taking a look at this second graph, the area under the > curve will be the total distance traveled. > > > > 2007/7/26, Albert Dahan : > > > > Hi Dave, > > > > Thanks for making that clear. > > > > Any idea how I can read the distance if the GPS isn't available? > > > > I need to determine the kilometers made by a car without using a > > pulse or can solution, is that possible? > > > > Regards, > > Albert > > > > On Jul 27, 2007, at 1:28 AM, Dave Hylands wrote: > > > > > Hi Albert, > > > > > >> Is it also possible to calculate the m/s from a car with the > > >> accelerometer, > > >> if the GPS is not available? > > > > > > You can integrate to get speed (I think). But if you're moving along > > > at a constant speed, the accelerometer will just read 0, regardless of > > > what speed you're moving with. > > > > > > -- > > > Dave Hylands > > > Vancouver, BC, Canada > > > http://www.DaveHylands.com/ > > > > > > ---------------------------------------------------------------------- > > > > > --- > > > This SF.net email is sponsored by: Splunk Inc. > > > Still grepping through log files to find problems? Stop. > > > Now Search log events and configuration files using AJAX and a > > > browser. > > > Download your FREE copy of Splunk now >> http://get.splunk.com/ > > > _______________________________________________ > > > gumstix-users mailing list > > > gumstix-users@... > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > ------------------------------------------------------------------------- > > > > This SF.net email is sponsored by: Splunk Inc. > > Still grepping through log files to find problems? Stop. > > Now Search log events and configuration files using AJAX and a browser. > > Download your FREE copy of Splunk now >> http://get.splunk.com/ > > _______________________________________________ > > gumstix-users mailing list > > gumstix-users@... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > -- > Christopher Gilbert > B.S., Computer Science > University of Maine 2006 > http://motomastyle.com > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > gumstix-users mailing list > gumstix-users@... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > ```