Method and apparatus for detecting direction and speed using PIR

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

2503383, 250349, G08B 13191

Patent

active

052910202

ABSTRACT:
A dual pyroelectric-effect sensor having the sensing elements aligned in a motion plane permits direction determinations to be made for moving IR sources. Dual sensing-element PIR sensors provide different voltage outputs depending upon a relative direction of movement of an object and the sensing elements. By alternating the effective polarizations of the sensing elements in the PIR sensor, clear direction information is available from the PIR sensor. A direction detecting circuit working in cooperation with a switch controller employing a counter and a timer, permits independent tallying of entrances and exits. Upon the counter indicating that the number of objects that exited the area equals the number of objects that entered, the lights are immediately extinguished. The timer ensures that the lights turn off should incorrect values become recorded in the counter.

REFERENCES:
patent: 4704533 (1987-11-01), Rose et al.
patent: 4799243 (1989-01-01), Zepke
patent: 4914298 (1990-04-01), Quad et al.
patent: 4943800 (1990-07-01), Ikeda et al.
patent: 4963749 (1990-10-01), McMaster

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for detecting direction and speed using PIR does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting direction and speed using PIR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting direction and speed using PIR will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-579769

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.