Single transmission line interrogated multiple channel data acquisition system
- Morgantown, WV
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.
- 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 4196417
- OSTI ID:
- 863548
- Country of Publication:
- United States
- Language:
- English
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Single transmission line interrogated multiple channel data acquisition system
Single transmission line interrogated multiple channel data acquisition system
Related Subjects
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
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