Patents by Inventor Yaoyu Li

Yaoyu Li 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).

  • FAULT DETECTION SYSTEMS AND METHODS FOR SELF-OPTIMIZING HEATING, VENTILATION, AND AIR CONDITIONING CONTROLS
    Publication number: 20090083583
    Abstract: A fault detection system for detecting a fault in a process system includes a first circuit configured to modify an input of the process system with a modifying signal. The fault detection system further includes a second circuit configured to receive an output from the process system and configured to determine whether the fault exists based on at least one of a reduction of a signal component and an unexpected transformation of the signal component, wherein the signal component corresponds to a function of the modifying signal.
    Type: Application
    Filed: November 25, 2008
    Publication date: March 26, 2009
    Inventors: John E. Seem, Yaoyu Li, Timothy Salsbury