[Tinyos-help] beams info in MSP410

[Prabal Dutta]

Hi Campbell,

There's no guaranteed method of knowing which "beam" is being broken
since (i) the beams are not really sharp beams but instead a fuzzy
field-of-view, (ii) the beams are an artifact of optics, not
electronics, and (iii) when a person walks by the sensor, the person's
path may not intersect all of the "beams" for a given sensor.  You
could estimate the beam in software with some but I suspect that you'd
find a non-negligible rate of misclassification.

- Prabal

On 6/16/06, campbell gao <campbellgao at gmail.com> wrote:
>
> hi , who does have the experience in accomplishing some detection
> application with MSP410??
>
> Now when the PIR sensor detects some body , the sensor just gives us one of
> the 4 quad values.ex quad 1 detected.
>  and i want to know could we get the sub-beams info ??ex. quad1 beams 2
> detected??
> and how ??
>
> best regards
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