Accession Number : ADD012106

Title :   Data Validation Monitor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Howarth,Robert F

Report Date : 12 Feb 1985

Pagination or Media Count : 8

Abstract : A method and apparatus is provided for detecting and rejecting spurious signals 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 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 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 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. (Author)

Descriptors :   *PATENTS, *DATA TRANSMISSION SYSTEMS, *CHANNELS, *MONITORS, DATA MANAGEMENT, SOURCES, DETECTORS, SPURIOUS EFFECTS, PULSES, MULTIVIBRATORS, DATA LINKS, VALIDATION

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE