Ok, sorry I couldn't resist being little facetious... as this was the first thing that popped into my head. As in, I very much doubt there is any sensor out there that can readily determine the genetic makeup of a human.
So I assume you are asking whether a PIR can differentiate the heat signature of an adult human form (as in adult body mass walking upright) from something else. And the anwer is... sort of... as in, a pyroelectric sensor (PIR) also requires the right type of fresnel lens to help determine this. If you use a "curtain" type fresnel lens, which has a narrow vertical field of view combined with a wide horizontal field of view, this lens can be positioned in such a way as only detect objects of a certain height, for example. If you then combine this technique with filtering or the methods, as described above, then you have a good chance of differentiating. Another option to improve results, is to also use two PIRs at different heights, and use as a comparitor where both need to trigger concurrently, to derive that it is a human form being detected.
Ok, sorry I couldn't resist being little facetious... as this was the first thing that popped into my head. As in, I very much doubt there is any sensor out there that can readily determine the genetic makeup of a human.
So I assume you are asking whether a PIR can differentiate the heat signature of an adult human form (as in adult body mass walking upright) from something else. And the anwer is... sort of... as in, a pyroelectric sensor (PIR) also requires the right type of fresnel lens to help determine this. If you use a "curtain" type fresnel lens, which has a narrow vertical field of view combined with a wide horizontal field of view, this lens can be positioned in such a way as only detect objects of a certain height, for example. If you then combine this technique with filtering or the methods, as described above, then you have a good chance of differentiating. Another option to improve results, is to also use two PIRs at different heights, and use as a comparitor where both need to trigger concurrently, to derive that it is a human form being detected.
