Patent
Method of and apparatus for monitoring for incipient electrode failure in the Joule effect heating of heat softenable material
TLDR
In this paper, a method of anticipating electrode failure by monitoring the current, voltage and resistance between electrode pairs in a Joule effect heating system is presented, where a relatively rapid change in monitored resistance is an indication of an incipient failure.Abstract:
A method of anticipating electrode failure by monitoring the current, voltage and resistance between electrode pairs in a Joule effect heating system. A relatively rapid change in monitored resistance is an indication of an incipient failure. Alarm indicators, instruction print out, and/or process controls can be actuated in response to a given current voltage or resistance change. Plural electrode pairs are monitored by multiplexing to provide a repetitive cyclic scan of the parameters between pairs. Distortion of current and voltage values is minimized, where selective portions of regular power pulses are gated for control of heating, and complex waveforms result by employing true r.m.s. values of current and voltage developed in true r.m.s. to d.c. converters.read more
Citations
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Patent
Method of and apparatus for monitoring for electrode displacement in the Joule effect heating of heat softenable material
TL;DR: In this article, a method of detecting electrode displacement in an opaque melt of heat softenable material heated by Joule effect through said electrode by monitoring the current, voltage and electrical displacement characteristics of a body of heatsoftenable material and the electrodes is presented.
Patent
Method of melting vitreous materials and use of the suitable device for the accomplishment of the method
TL;DR: In this paper, the thermal energy to be supplied electrically to the vitreous mass is controlled by supplying the melting plant according to supplying cycles consisting of pre-established intervals of time during which the power applied to the plant was much higher than the maximum permissible input when the plant is continuously supplied.
Patent
Method and apparatus for determining the level of slag containing iron or iron compounds in a glass melting furnace
TL;DR: In this paper, a method and apparatus for determining the level of slag containing iron or iron compounds in the bottom of a glass melting furnace is disclosed, where electrically conductive electrodes or probes are placed in a predetermined position in the furnace.
Patent
Method and apparatus for measuring the temperature of molten masses
TL;DR: In this article, the authors measured the electrical resistance between pairs of heating electrodes in measuring paths defined by such electrodes and then calculated the temperature existing within the individual measuring paths on the basis of the measure resistance values.
Patent
Condition monitoring and controlling of heating elements in wind turbines
TL;DR: In this paper, the authors present a method for monitoring and controlling a condition of a heating element in a wind turbine blade and the wind turbine rotor blade by measuring a voltage applied to the heating element and measuring the current flowing through the heating elements.
References
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Electronic circuits for temperature control
TL;DR: In this article, a resistance path through which an electric current is passed is maintained at a desired temperature by monitoring the current through the path, developing a signal which is indicative of the reciprocal of the current, multiplying this signal by a signal indicating the voltage across the path to provide a signal representative of the resistance of the path.