Isolated thermocouple amplifier system for stirred fixed-bed gasifier

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868539

Fasching, George E ^[1]

---

1. Morgantown, WV

A sensing system is provided for determining the bed temperature profile of the bed of a stirred, fixed-bed gasifier including a plurality of temperature sensors for sensing the bed temperature at different levels, a transmitter for transmitting data based on the outputs of the sensors to a remote operator's station, and a battery-based power supply. The system includes an isolation amplifier system comprising a plurality of isolation amplifier circuits for amplifying the outputs of the individual sensors. The isolation amplifier circuits each comprise an isolation operational amplifier connected to a sensor; a first "flying capacitor" circuit for, in operation, controlling the application of power from the power supply to the isolation amplifier; an output sample and hold circuit connected to the transmitter; a second "flying capacitor" circuit for, in operation, controlling the transfer of the output of the isolation amplifier to the sample and hold circuit; and a timing and control circuit for activating the first and second capacitor circuits in a predetermined timed sequence.

• 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 5163754
• OSTI ID: 868539
• Country of Publication: United States
• Language: English

Related Subjects

isolated
thermocouple
amplifier
stirred
fixed-bed
gasifier
sensing
provided
determining
bed
temperature
profile
including
plurality
sensors
levels
transmitter
transmitting
data
based
outputs
remote
operator
station
battery-based
power
supply
isolation
comprising
circuits
amplifying
individual
comprise
operational
connected
sensor
flying
capacitor
circuit
operation
controlling
application
output
sample
hold
transfer
timing
control
activating
predetermined
timed
sequence
bed temperature
data base
temperature profile
circuit connected
predetermined time
control circuit
power supply
temperature sensor
amplifier circuit
temperature sensors
hold circuit
operational amplifier
transmitting data
amplifier connected
fixed-bed gasifier
individual sensor
gasifier including
bed gasifier
data based
determined time
/374/