There are many sensors that may be used to do this. If you use accelerometers, any motion of the hand, arm, or whole body will be captured as well. You will have to account for this in the development of your system.

If you just want to detect motion of the fingers with reference to the hand, I would recommend using hall-effect sensors or something similar. Hall-effect sensors can be used as joint-angle transducers on the fingers with a permanent magnet on the hand to create a frame of reference.

This paper describes an arm posture sensor, but it may be useful to you:

Article Sensing human arm posture with implantable sensors

Bradley Nelson

Many thanks for your suggestion. But the Hall effect sensors will also be affected by other external magnetic fields, creating unwanted signals.

Dear Dr. Khandelwal,

Perhaps the use of a glove with inertial sensors could be a reference for your research . I did a recent search on this technology, and a model that seemed appropriate is Nansense glove (Red: Pro or Biomed):

https://www.nansense.com/gloves/

I hope this information can be useful .

Best Regards,

Wagner de Godoy

http://analisedemarcha.com/

Brazil