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

Patent · Thu Jan 01 00:00:00 EST 1987

OSTI ID:866311

Fasching, George E ^[1]

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1. Morgantown, WV

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.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4680585
• OSTI ID: 866311
• Country of Publication: United States
• Language: English

Related Subjects

pulse-excited
auto-zeroing
multiple
channel
data
transmission
provided
signals
plurality
pulse
operated
transducers
corresponding
signal
processor
channels
multiplexed
single
fm
receiving
station
amplifiers
powered
pulsing
dc
battery
power
devices
conserve
energy
size
long-term
remote
inaccessible
locations
auto
zeroing
compensate
drift
associated
temperature
changes
decay
component
aging
etc
accomplished
means
unique
zero
feature
pulses
holds
correction
voltage
integrating
capacitor
coupled
amplifier
output
pseudo-continuous
outputs
achieved
pulsed
sample-and-hold
circuits
updated
operation
rate
transmitter
receiver
demultiplexing
storage
separate
recorders
battery power
single channel
temperature change
data transmission
temperature changes
multiple channel
signal processor
amplifier output
channel data
hold circuit
receiving station
signal pulses
signal pulse
separate channel
signal process
pulse operated
fm receiver
corresponding plurality
hold circuits
accessible location
dc battery
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