Data validation monitor

Details Data validation monitor Data validation monitor

1983-05-26

1985-02-12

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

34087011, 360 47, 371 68, H04L 122

Patent

active

044995849

ABSTRACT:
A method and apparatus is provided for detecting and rejecting spurious sals that may arise in incoming data. A remotely disposed data producing sensor for each sensor data channel and a single blind data channel extend to a receiver or a recorder. A data link is provided linking each sensor channel to the recorder and a one-shot multivibrator generates a sensor channel pulse whenever a signal having less than a predetermined rise time and exceeding a predetermined magnitude comes through the sensor data channel. Another one-shot multivibrator coupled to the blind channel generates a blind channel pulse whenever a signal satisfies the same conditions as for the sensor channel. An AND gate associated with each sensor data channel initiates an interruption of the data link for the duration of a coincident receipt of the sensor channel pulse and the blind channel pulse to connect a d.c. potential source to the recorder for the duration of the multivibrator pulse and to recouple the data link to the recorder when the coincident receipt of the sensor channel pulse and the blind channel pulse stops. Thus, spurious signals appearing on both channels are detected and eliminated from the data channel. Data coming only on the data channel and not appearing on the blind channel passes to the recorder without interruption. A plurality of the data channels each having a sensor cooperate with a single blind channel to eliminate spurious signals from all the data channels so that the single blind channel can improve the validity of data transmitted from a number of data sources simultaneously.

REFERENCES:
patent: 3476922 (1969-11-01), Yiotis
patent: 4202018 (1980-05-01), Stockham, Jr.
patent: 4342112 (1982-07-01), Stodola
patent: 4393493 (1983-07-01), Edwards
patent: 4442521 (1984-04-01), Inaba et al.

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