1 Jun 2006 01:08
Re: [EE] Methods for tracking finger position
Forgive me for not providing a more complete description. The intended applicaton is a type of "virtual keyboard". For now, I need to simulate, using a finger-mounted sensor, the action of reaching out and touching a key with one finger. And then be able to track the finger as it is lifted and moved to another key. This will eventually be expanded to 10 fingers. I located some information on the sensors you mentioned - these could be used to determine if the finger is bent (i.e pressing a key), but that still leaves the problem of locating the finger in space. BTW, $6-12 per finger is not a show-stopper - I would just like to do it for less if possible. Thanks, Randy > > I have been tasked with doing a conceptual design for a device > > that tracks finger movement using a sensor device mounted to > > the finger. Does anyone have experience with this or something > > similar? Or thoughts or ideas? For now, I only have to worry > > about one finger - but need to track position in 3 dimensions > > with a resolution of about 5mm over an area of 1 cubic meter. > > Also, the device cannot use a reflective method (such as ir or > > ultrasonic). So far, I have investigated using accelerometer > > chips, but these are still fairly expensive and I would like a > > lower-cost alternative. > > I'm not certain this is a feasible project within the parameters given. > Particularly, the fact that you're feeling accelerometers are too > costlly gives me pause. If you can't handle US$6-12 per finger, > which is the cost of many MEMS accelerometers these days, you > are not likely to find a non-reflective method for tracking ten fingers(Continue reading)
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