Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1998-02-24
2000-03-07
Pope, Daryl
Communications: electrical
Condition responsive indicating system
With particular system function
340505, 340661, 324525, 324537, G08B 2900
Patent
active
060346019
ABSTRACT:
A method and apparatus detect devices on a line in an alarm system that have been assigned a common or duplicate address, or that are located beyond the maximum allowable wiring distance on the line, or that are poorly connected to the line thus providing weak answers to communications from the control panel. The method and apparatus operate by polling suspect addresses of devices on the line while adjusting the sensitivity of the receiver. The sensitivity of the receiver is lowered by an amount corresponding to the test being performed. In duplicate address testing, the sensitivity of the receiver is lowered by an amount such that a single response from only one device having the polled address will not be sensed, but combined responses from more than one device having the same address are sensed. In weak answer testing, the sensitivity of the receiver is lowered by an amount such that a single response from a device securely connected to the line and within the wiring distance limits is detected, but a device un-securely connected to the line or beyond the maximum wiring distance is not detected.
REFERENCES:
patent: 4489312 (1984-12-01), Yoshizaki
patent: 4777473 (1988-10-01), Weston et al.
patent: 4947162 (1990-08-01), Kimura
patent: 5247245 (1993-09-01), Nelson
patent: 5475363 (1995-12-01), Suzuki et al.
patent: 5565852 (1996-10-01), Peltier et al.
patent: 5594417 (1997-01-01), Morita
Barrieau Mark P.
Faulkner Mike A.
Maier, Jr. Paul H.
Pope Daryl
Simplex Time Recorder Company
LandOfFree
Method and apparatus for determining proper installation of alar 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 determining proper installation of alar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for determining proper installation of alar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-366993