Just a hint: You may be able to "model" a pacemaker's EMR sensitivity with several coils of wire of different size (for different frequency ranges), each with a simple detector circuit. You, after all, don't have to fully characterize the EMR, just detect that it's present in a given band and above a given level. (It would help, of course, to have some idea what frequencies a pacemaker is sensitive to.)
On Aug 6, 5:14 pm, Jaan <[email protected]> wrote: > Hi Bob, > > Thanks for your reply. > > We are working on a master project, where we want to detect the > magnetic radiation signals, which would affect the patients with > Pacemaker devices. > Thus, magnetic radiations may be ranging from very mild to maximum > intensity. The wavelength would not be in too many colors, but a > simple detection of the magnetic signal should do. > > On Jul 25, 12:18 am, Bob Kerns <[email protected]> wrote: > > > Your problem statement is too vague to be useful. I don't mean so much > > useful to us, as useful to you. > > > You really need to be a great deal more specific about what you want > > to sense. The term "electromagnetic radiation" covers a range from > > signals with wavelengths many orders of magnitude larger than your > > handheld, to ones with wavelengths many orders of magnitude smaller. > > > And intensities vary from ones capable of vaporizing your handheld, to > > ones where you'd need a special isolation chamber and a good supply of > > liquid helium to be able to detect. > > > And then finally -- with this be modulated, pure, mixed? Are you > > interested in determining the spectrum, the total energy flux, > > direction? Do you seek to resolve multiple signals? > > > Hopefully, you'll just need one of the simpler combinations of the > > above factors, and can focus your efforts on that. Many smartphones > > come with a light detector, or a camera, which can be used for a > > certain range of electromagnetic radiation. > > > If you're looking for powerline-frequency energy, or a similar range, > > consider a small tuned resonant coil, hooked to an A-D pin on an > > Arduino controller with a wifi or bluetooth interface. > > > Microwave frequencies will require a whole other set of techniques and > > skills -- resonant chambers, etc. Infrared, UV -- the camera might > > work - try it and see. > > > Narrow it down and your situation gets a whole lot simpler. > > > On Jul 24, 11:14 am, Jaan <[email protected]> wrote: > > > > Hi , > > > > i am a student who is very new to Android platform. I am working on a > > > project which has to sense the EMR (Electro magnetic radiation ) > > > signals and notify the intensity of the EMR signals on the Android > > > phone. > > > > 1. Are there any available external EMR sensor devices which can be > > > connected to the Android smartphones to get the intensity of EMR ? > > > > 2. Or is it feasible to develop/implement a sensor app on Android. > > > TO do so, the ANdroid phone should consist of a built-in Sensor. ( I > > > am not sure how this is going to work). > > > > thanks in advance. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
