Data communication system

Details Data communication system Data communication system

1981-10-16

1986-04-15

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082558, 34082569, 370 71, H04Q 900

Patent

active

045830908

ABSTRACT:
A data communication system for general purposes having a new ternary carrier frequency shift keying (TCSK) signal. The system is applied to a utility load control by transmission of a sub-carrier of an FM broadcast channel. It is decoded by a receiver, SCA decoder, TCSK filter and a two level or binary converter and used to communicate to a pre-programmed microprocessor which enables various load control functions to be performed. The general system also is given for a QPSK (quadraphase shift keying) operating system.
A data transmission filter is split between the transmitter and receiver and is operated in cascade to give individual interference filtering at each end of the transmission while also providing combined action and wave shaping. A high accuracy FM decoder using zero crossing detection enables data recovery with simple circuits. A novel random time load restoration circuit for ramp-up is disclosed. A fail safe relay operator is also disclosed.
The TCSK employs a novel 19 character hex code format which is 8 bit microprocessor compatible and directly usable for other purposes such as ASCII message transmission. Both QPSK and TCSK systems offer command structures of variable length so as to permit truncation of message and reduce total message transmit time.

REFERENCES:
patent: 3413556 (1968-11-01), King
patent: 3643160 (1972-02-01), Ray et al.
patent: 3842249 (1974-10-01), Geyer et al.
patent: 3845391 (1974-10-01), Crosby
patent: 3845412 (1974-10-01), Rearwin et al.
patent: 3929407 (1976-02-01), Bickford
patent: 3946243 (1976-03-01), Anderson et al.
patent: 3980954 (1976-09-01), Whyte
patent: 4096520 (1978-06-01), Furuta
patent: 4117405 (1978-09-01), Martinez
patent: 4152605 (1979-05-01), Conde et al.
patent: 4156194 (1979-05-01), Mueller
patent: 4190800 (1980-02-01), Kelly, Jr. et al.
patent: 4199761 (1980-04-01), Whyte et al.
patent: 4247786 (1981-01-01), Hedges
patent: 4302750 (1981-11-01), Wadhwani et al.
patent: 4348668 (1982-09-01), Gurr et al.
patent: 4352992 (1982-10-01), Buenaegel et al.
patent: 4360881 (1982-11-01), Martinson
patent: 4409635 (1983-10-01), Krauss
Thomas D. Smith, A Novel System for Managing Electrical Utility Loads, 7th IEEE/PES Transmission and Distribution Conference and Exposition (Apr. 1-6, 1979), pp. 594-599.

Affiliated with

Also associated with

Rating

Data communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1442018