Calculate the location of something

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Calculating the location of a single object, like a hand, without cameras can be achieved using methods such as radio triangulation and accelerometers. The discussion suggests using a transponder for tracking and emphasizes the need for specific design specifications to create an effective solution. There are references to existing technologies, such as Disney's Touche sensor and sonar, which may offer insights but also present challenges. The desired tracker should be compact, approximately 1"x4", and capable of tracking a single body part. Overall, the feasibility of these tracking methods depends on the precise requirements and limitations of the chosen technology.
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is it possible to calculate the location of say my right hand and track its motion without using any cameras.(using radio triangulation,accelerometer,etc..) i would like to have some sort of ground sensor. and i only want to track that one object not several, i would like to know the distance from the sensor, height of object being tracked, location relative to the location of the ground sensor.
 
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I have several ideas for you. But first, can you use a transponder attached to the object? What will the maximum detection/tracking range be? Will you please describe what you are aiming for in some greater detail? A designer needs "design specifications" or "anticapated operating characteristics" to make a reasonable proposal.
 
on the issue of sonar. it seems very intruiging but there may be a few probelems i need the tracker to be a small bar roughly 1"x4" and can sonar be used to track a single body part?
 

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