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Altera_Forum's avatar
Altera_Forum
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13 years ago

distance measuring by encoder

I bought an encoder which generate square pulses sig. i have to stop the engine if arrived to a required distance. i know that the wheel diameter is 7cm. and the distance is pi*diameter a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Is yours a single or dual phase encoder?

Usually encoders have two phases, namely two square pulses signals 90 degrees out of phase. This allows you to know direction, besides distance.

If this is your case, you may use a standard encoder counter: try browsing opencores.org, search for quadrature encoder/decoder.

Instead, if you have a single phase encoder, you simply need to count raw pulses.