PIR sensor［疑问］

ychenfei

如果你们玩过PIR应该懂～～PIR是motion detector.

要是人走过，就detect到。
但是猫或狗走过，不要detect到。

应该怎样办？

pic

PIR 那枚sensor是Analog output， 当有热能（heat）变化，会有不同的电压输出。
你可以set Threshold，太小的变化如猫狗不予理会。

hiq999

原帖由 ychenfei 于 11-7-2006 17:00 发表
如果你们玩过PIR应该懂～～PIR是motion detector.

要是人走过，就detect到。
但是猫或狗走过，不要detect到。

应该怎样办？

或者加filter to limit incoming radiation to the 8 to 14mm range which is
most sensitive to human body radiation.

ychenfei

incoming radiation to the 8 to 14mm range

这个什么意思？

ychenfei

我用的part是NIPPON=RE200B-WW-p-IQE
Nippon Ceramic CO.

我没有softcopy，不好意思

[ 本帖最后由 ychenfei 于 27-7-2006 11:21 AM 编辑 ]

hiq999

原帖由 ychenfei 于 27-7-2006 08:56 发表
incoming radiation to the 8 to 14mm range

这个什么意思？

  A Fresnel lens (pronounced Frennel) is a Plano Convex lens that has been collapsed on itself to form a flat lens that retains its optical characteristics but is much smaller in thickness and therefore has less absorption losses.



Our FL65 Fresnel lens is made of an infrared transmitting material that has an IR transmission range of 8 to 14um which is most sensitive to human body radiation. It is designed to have its grooves facing the IR sensing element so that a smooth surface is presented to the subject side of the lens which is usually the outside of an enclosure that houses the sensor.

approx USD4 each





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ychenfei

原帖由 hiq999 于 27-7-2006 05:10 PM 发表



  A Fresnel lens (pronounced Frennel) is a Plano Convex lens that has been collapsed on itself to form a flat lens that retains its optical characteristics but is much smaller in thickness an ...

你这个PIR什么part??可不可以解释？？你有datasheet吗？？


USD４ 这么贵的？？？
我弄坏很多个咯～～我的好像很便宜～～
等我check check 价钱