Short Range Position System

[Ariel Fligler]

Hello,

I would like to build a system to track the movement of Lego bricks on a surface the size of an ordinary diner table. I would like to attach some kind of sensor to each brick that will allow me to identify it locatiob along time as I move it o I could build a path. I am looking for hogh accuracy (1-3 m"m).

Any idea how this can be done and what sensors I should use will be highly appreciated.

Thanks,

Ariel

[GANEEV SINGH]

Hi

If you want to locate lego brick then apart from having a sensor on board there must be a stationary sensor inside the area(diner table) which with help of onboard sensor would locate brick's precise location.

Now talking about the type of sensor to use, ultrasonic sensors will be the best choice according to me.

[Ashutosh Bhatt]

i think as per the accuracy you want

you have to multiple proximity (inductive or capacitive) sensors

you have to first make sectorize your area in to small square segments in matrix form

then in every cell you have to put one proximity sensor

finaly locate the brick position from output of two sensors (row-column)

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