Patents by Inventor Marco E. Sanjuan

Marco E. Sanjuan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for on-line estimation and forecasting of species concentration during a reaction by measuring electrical conductivity
    Patent number: 8390446
    Abstract: A method and apparatus for on-line measurement and forecasting of a species concentration while a reaction is taking place, based on the measurement of the electrical conductivity of the reacting volume, and using such measurement to evaluate a first mathematical function relating such value to the concentration of the species in the reacting volume. The evaluation of the first mathematical function requires as inputs: electrical conductivity trajectory, time elapsed, and other significant process variables; it generates as outputs the estimated actual species concentration and at least one forecasted concentration value.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: March 5, 2013
    Assignee: Fundacion Universidad del Norte
    Inventors: Marco E. Sanjuan, Jaime R. Garcia, Jose D. Posada, Pedro J. Villalba
  • System and method to avoid oscillatory behavior in proportional-integral-derivative (PID) controllers by using fuzzy inference and modified/active damping
    Patent number: 7809668
    Abstract: An instability avoidance module that can be implemented in SISO PID control loops to automatically adjust the controller's tuning parameters when undesired oscillatory behavior is monitored. This module is a Fuzzy-based Supervisor composed of a dynamic parameter identification module that operates on-line, and a Fuzzy Inference System (FIS) with fuzzy rules to modify PID tuning. Tests in nonlinear process models were performed, demonstrating that this Fuzzy Supervisor—Type 1 (non-intrusive) provides the PID controller the ability to adapt its tuning to eliminate the observed oscillatory behavior.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: October 5, 2010
    Assignees: Universidad del Norte, University of South Florida
    Inventors: Carlos A. Smith, Marco E. Sanjuan
  • METHOD AND APPARATUS FOR ON-LINE ESTIMATION AND FORECASTING OF SPECIES CONCENTRATION DURING A REACTION
    Publication number: 20100109893
    Abstract: A method and apparatus for on-line measurement and forecasting of a species concentration while a reaction is taking place, based on the measurement of the electrical conductivity of the reacting volume, and using such measurement to evaluate a first mathematical function relating such value to the concentration of the species in the reacting volume. The evaluation of the first mathematical function requires as inputs: electrical conductivity trajectory, time elapsed, and other significant process variables; it generates as outputs the estimated actual species concentration and at least one forecasted concentration value.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 6, 2010
    Inventor: Marco E. Sanjuan