Patents by Inventor Wind Xia

Wind Xia 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).

  • Detection apparatus and method for detecting a rotational speed of a fan
    Publication number: 20080106428
    Abstract: A detection apparatus and a method for detecting the rotation speed of a fan are disclosed. The detection apparatus comprises a photoelectric sensing unit, a processing unit, and a prompt unit. The photoelectric sensing unit senses the strength of a light beam reflected in response to the rotation of the fan to generate a frequency signal. The processing unit converts the frequency signal into a rotation speed signal, and determines whether the rotation speed falls within a certain range. If yes, the processing unit generates a first prompt signal, from which the prompt unit can show a message of normal operation. If no, the processing unit generates a second prompt signal, from which the prompt unit can show a message of abnormal operation.
    Type: Application
    Filed: March 15, 2007
    Publication date: May 8, 2008
    Inventors: Hacker Yan, Brother Zhong, Wind Xia