Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1984-03-08
1986-02-25
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340505, 340531, 340534, 340310A, G08B 108, H04Q 700
Patent
active
045730415
ABSTRACT:
An electric wiring system has a plurality of terminal units, a plurality of sensors connected to the terminal units by signal input lines, and a central control unit connected to the terminal units by a pair of common power supply lines, which receive signals from the sensors. The central control unit has a reference signal generator circuit which repetitively generates a reference signal composed of a train of pulses, a predetermined number of which are assigned to each of the sensors, a modulator circuit for applying the reference signal to the power supply lines, a demodulator circuit for picking up a composite signal generated by the terminal unit from the power supply line, and a control circuit for detecting abnormal and normal signals of the sensors and breakage of the power supply lines and signal input lines based on the presence and absence of high-frequency pulses in the composite signal, thus indicating sensor and line conditions. Each of the terminal units has a demodulator circuit for picking up the reference signal from the power supply lines, a composite signal generator circuit for generating the composite signal by adding the high-frequency pulses at pulse positions corresponding to the pulses of the reference signal assigned to the sensors, dependent on the abnormal and normal signals of the sensors and breakage of the signal input lines, and a modulator circuit for applying the composite signal to the power supply lines.
REFERENCES:
patent: 3516063 (1970-06-01), Arkin et al.
patent: 3713142 (1973-01-01), Getchell
patent: 3735396 (1973-05-01), Getchell
patent: 3815093 (1974-06-01), Caretto et al.
Akita Sigeyuki
Kitagawa Junji
Yamanoue Kouichi
Crosland Donnie L.
Nippon Soken Inc.
LandOfFree
Electric wiring system having a plurality of sensors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric wiring system having a plurality of sensors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric wiring system having a plurality of sensors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1014281