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Title: Single transmission line interrogated multiple channel data acquisition system

Abstract

A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensor circuits each monitors a specific process variable and each transmits measurement values over a single transmission line to a master interrogating station when addressed by said master interrogating station. Typically, as many as 330 remote stations may be parallel connected to the transmission line which may exceed 7,000 feet. The interrogation rate is typically 330 stations/second. The master interrogating station samples each station according to a shared, charging transmit-receive cycle. All remote station address signals, all data signals from the remote stations/sensors and all power for all of the remote station/sensors are transmitted via a single continuous terminated coaxial cable. A means is provided for periodically and remotely calibrating all remote sensors for zero and span. A provision is available to remotely disconnect any selected sensor station from the main transmission line.

Inventors:
 [1];  [1]
  1. (Morgantown, WV)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
863548
Patent Number(s):
4196417
Assignee:
United States of America as represented by United States (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
single; transmission; line; interrogated; multiple; channel; data; acquisition; provided; plurality; remote; station; sensor; circuits; monitors; specific; process; variable; transmits; measurement; values; master; interrogating; addressed; typically; 330; stations; parallel; connected; exceed; 000; feet; interrogation; rate; samples; according; shared; charging; transmit-receive; cycle; address; signals; sensors; power; transmitted; via; continuous; terminated; coaxial; cable; means; periodically; remotely; calibrating; zero; span; provision; available; disconnect; selected; main; single transmission; remote station; multiple channel; data acquisition; transmission line; coaxial cable; process variable; data signals; channel data; data signal; transmitted via; remote sensor; parallel connected; specific process; measurement values; line interrogated; interrogated multiple; /340/

Citation Formats

Fasching, George E., and Keech, Jr., Thomas W. Single transmission line interrogated multiple channel data acquisition system. United States: N. p., 1980. Web.
Fasching, George E., & Keech, Jr., Thomas W. Single transmission line interrogated multiple channel data acquisition system. United States.
Fasching, George E., and Keech, Jr., Thomas W. Tue . "Single transmission line interrogated multiple channel data acquisition system". United States. https://www.osti.gov/servlets/purl/863548.
@article{osti_863548,
title = {Single transmission line interrogated multiple channel data acquisition system},
author = {Fasching, George E. and Keech, Jr., Thomas W.},
abstractNote = {A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensor circuits each monitors a specific process variable and each transmits measurement values over a single transmission line to a master interrogating station when addressed by said master interrogating station. Typically, as many as 330 remote stations may be parallel connected to the transmission line which may exceed 7,000 feet. The interrogation rate is typically 330 stations/second. The master interrogating station samples each station according to a shared, charging transmit-receive cycle. All remote station address signals, all data signals from the remote stations/sensors and all power for all of the remote station/sensors are transmitted via a single continuous terminated coaxial cable. A means is provided for periodically and remotely calibrating all remote sensors for zero and span. A provision is available to remotely disconnect any selected sensor station from the main transmission line.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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