Doppler shift motion detector with variable power
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 15, 1994
Grant Date -
N/A
app pub date -
Aug 24, 1992
filing date -
Aug 24, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The Doppler shift motion detector has an effective motion detection range which can be changed by changing the power level and thus without changing the motion detection circuitry. The Doppler shift motion detector also has a self test for the wave transmitter and receiver which can be carried out without requiring placing a moving object in the monitoring area. The Doppler shift signal generated when the power level is changed is used to check the detector for the self test and is ignored by the detector alarm output circuitry when the power level is changed. An anti-masking feature is also provided.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully