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Title: Pulse-excited, auto-zeroing multiple channel data transmission system

Abstract

A multiple channel data transmission system is provided in which signals from a plurality of pulse operated transducers and a corresponding plurality of pulse operated signal processor channels are multiplexed for single channel FM transmission to a receiving station. The transducers and corresponding channel amplifiers are powered by pulsing the dc battery power to these devices to conserve energy and battery size for long-term data transmission from remote or inaccessible locations. Auto zeroing of the signal channel amplifiers to compensate for drift associated with temperature changes, battery decay, component aging, etc., in each channel is accomplished by means of a unique auto zero feature which between signal pulses holds a zero correction voltage on an integrating capacitor coupled to the corresponding channel amplifier output. Pseudo-continuous outputs for each channel are achieved by pulsed sample-and-hold circuits which are updated at the pulsed operation rate. The sample-and-hold outputs are multiplexed into an FM/FM transmitter for transmission to an FM receiver station for demultiplexing and storage in separate channel recorders.

Inventors:
Issue Date:
Research Org.:
USDOE Morgantown Energy Technology Center, WV
OSTI Identifier:
5382244
Application Number:
ON: DE85017760
Assignee:
Dept. of Energy EDB-85-148877
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT; DATA TRANSMISSION SYSTEMS; DESIGN; ELECTRONIC CIRCUITS; CAPACITORS; FREQUENCY MODULATION; PULSES; SIGNALS; TRANSDUCERS; ELECTRICAL EQUIPMENT; EQUIPMENT; MODULATION; 420800* - Engineering- Electronic Circuits & Devices- (-1989); 010404 - Coal, Lignite, & Peat- Gasification

Citation Formats

Fasching, G.E. Pulse-excited, auto-zeroing multiple channel data transmission system. United States: N. p., 1985. Web.
Fasching, G.E. Pulse-excited, auto-zeroing multiple channel data transmission system. United States.
Fasching, G.E. Fri . "Pulse-excited, auto-zeroing multiple channel data transmission system". United States.
@article{osti_5382244,
title = {Pulse-excited, auto-zeroing multiple channel data transmission system},
author = {Fasching, G.E.},
abstractNote = {A multiple channel data transmission system is provided in which signals from a plurality of pulse operated transducers and a corresponding plurality of pulse operated signal processor channels are multiplexed for single channel FM transmission to a receiving station. The transducers and corresponding channel amplifiers are powered by pulsing the dc battery power to these devices to conserve energy and battery size for long-term data transmission from remote or inaccessible locations. Auto zeroing of the signal channel amplifiers to compensate for drift associated with temperature changes, battery decay, component aging, etc., in each channel is accomplished by means of a unique auto zero feature which between signal pulses holds a zero correction voltage on an integrating capacitor coupled to the corresponding channel amplifier output. Pseudo-continuous outputs for each channel are achieved by pulsed sample-and-hold circuits which are updated at the pulsed operation rate. The sample-and-hold outputs are multiplexed into an FM/FM transmitter for transmission to an FM receiver station for demultiplexing and storage in separate channel recorders.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {2}
}