Patents by Inventor Qingqin Shi

Qingqin Shi 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).

  • Smoke detection method, smoke detection device, smoke alarm and storage medium
    Patent number: 10769938
    Abstract: The invention discloses a smoke detection method, which comprises the steps of: adjusting a detection period of a smoke alarm to be a rapid detection period when a smoke density is detected to meet a set density threshold; calculating a ratio of an electrical signal increment caused by a first transmitted signal to an electrical signal increment caused by a second transmitted signal; and increasing a smoke alarm threshold when smoke is judged not to be caused by a fire hazard based on the ratio. In the invention, different types of smoke can be identified and different alarm modes can be selected to solve the problem of a false alarm.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: September 8, 2020
    Assignee: SITERWELL ELECTRONICS CO., LIMITED
    Inventors: Dongfang Chen, Xingxing Huang, Qingqin Shi