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Title: Circuit for monitoring temperature of high-voltage equipment

Abstract

This invention relates to an improved circuit for measuring temperature in a region at high electric potential and generating a read-out of the same in a region at lower potential. The circuit is specially designed to combine high sensitivity, stability, and accuracy. A major portion of the circuit situated in the high-potential region can take the form of an integrated circuit. The preferred form of the circuit includes an input section which is situated in the high-potential region and comprises a temperature-compensated thermocouple circuit for sensing temperature, an oscillator circuit for generating a train of ramp voltages whose rise time varies inversely with the thermocouple output, a comparator and switching circuit for converting the oscillator output to pulses whose frequency is proportional to the thermocouple output, and a light-emitting diode which is energized by these pulses. An optical coupling transmits the light pulses generated by the diode to an output section of the circuit, situated in a region at ground. The output section comprises means for converting the transmitted pulses to electrical pulses of corresponding frequency, means for amplifying the electrical pulses, and means for displaying the frequency of the same. The preferred embodiment of the overall circuit is designedmore » so that the frequency of the output signal in hertz and tenths of hertz is equal to the sensed temperature in degrees and tenths of degrees.« less

Inventors:
 [1]
  1. Chillicothe, OH
Issue Date:
Research Org.:
Goodyear Atomic Corp., Piketon, Ohio
OSTI Identifier:
862630
Patent Number(s):
3978729
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01D - MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
DOE Contract Number:  
AT(33-2)-1
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
circuit; monitoring; temperature; high-voltage; equipment; relates; improved; measuring; region; electric; potential; generating; read-out; specially; designed; combine; sensitivity; stability; accuracy; major; portion; situated; high-potential; form; integrated; preferred; input; section; comprises; temperature-compensated; thermocouple; sensing; oscillator; train; ramp; voltages; rise; time; varies; inversely; output; comparator; switching; converting; pulses; frequency; proportional; light-emitting; diode; energized; optical; coupling; transmits; light; generated; ground; means; transmitted; electrical; corresponding; amplifying; displaying; embodiment; overall; signal; hertz; tenths; equal; sensed; degrees; oscillator circuit; emitting diode; measuring temperature; light-emitting diode; specially designed; light pulses; preferred embodiment; output signal; integrated circuit; electric potential; major portion; preferred form; electrical pulses; switching circuit; comprises means; light pulse; rise time; pulses generated; transmitted pulse; overall circuit; optical coupling; electrical pulse; oscillator output; monitoring temperature; improved circuit; /340/374/

Citation Formats

Jacobs, Martin E. Circuit for monitoring temperature of high-voltage equipment. United States: N. p., 1976. Web.
Jacobs, Martin E. Circuit for monitoring temperature of high-voltage equipment. United States.
Jacobs, Martin E. Thu . "Circuit for monitoring temperature of high-voltage equipment". United States. https://www.osti.gov/servlets/purl/862630.
@article{osti_862630,
title = {Circuit for monitoring temperature of high-voltage equipment},
author = {Jacobs, Martin E},
abstractNote = {This invention relates to an improved circuit for measuring temperature in a region at high electric potential and generating a read-out of the same in a region at lower potential. The circuit is specially designed to combine high sensitivity, stability, and accuracy. A major portion of the circuit situated in the high-potential region can take the form of an integrated circuit. The preferred form of the circuit includes an input section which is situated in the high-potential region and comprises a temperature-compensated thermocouple circuit for sensing temperature, an oscillator circuit for generating a train of ramp voltages whose rise time varies inversely with the thermocouple output, a comparator and switching circuit for converting the oscillator output to pulses whose frequency is proportional to the thermocouple output, and a light-emitting diode which is energized by these pulses. An optical coupling transmits the light pulses generated by the diode to an output section of the circuit, situated in a region at ground. The output section comprises means for converting the transmitted pulses to electrical pulses of corresponding frequency, means for amplifying the electrical pulses, and means for displaying the frequency of the same. The preferred embodiment of the overall circuit is designed so that the frequency of the output signal in hertz and tenths of hertz is equal to the sensed temperature in degrees and tenths of degrees.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

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