초록 ▼

A system for monitoring and controlling the state of a thermal process. The system applies a modulated heat input to a liquid in a vessel and a thermal response measured at the bottom of the vessel provides information for real time processing of thermal properties of the liquid as it is being heate

A system for monitoring and controlling the state of a thermal process. The system applies a modulated heat input to a liquid in a vessel and a thermal response measured at the bottom of the vessel provides information for real time processing of thermal properties of the liquid as it is being heated. Detection and control of an unknown boiling point enables a steady simmer or boiling condition in the liquid to be maintained.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] In a system for monitoring and controlling the state of a thermal process, the improvement comprising:means for providing a fluctuating heat input to a container in response to a heat control signal;m

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] In a system for monitoring and controlling the state of a thermal process, the improvement comprising:means for providing a fluctuating heat input to a container in response to a heat control signal;means for sensing temperature of said container;means connected to said temperature sensing means for calculating parameters based on fluctuations of temperature at said container, said parameters including a linear rate of change (.alpha.) of said temperature, an amplitude (.beta.) of said temperature fluctuations in response to said fluctuating heat input, and a phase shift (.phi.) of said temperature fluctuations relative to said fluctuating heat input;fuzzy logic means, having inputs connected to said .alpha., .beta., and .phi. outputs of said parameter calculating means and said heat control signal for generating a signal indicating a boiling point of said liquid; andmeans connected to an output of said fuzzy logic means for generating said heat control signal.