Patents by Inventor Tianli Gao

Tianli Gao 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).

  • Multi-cavity semi-open resonant photoacoustic cell and multi-gas simultaneous measurement system
    Patent number: 11300499
    Abstract: The present invention belongs to the technical field of trace gas detection, and relates to a multi-cavity semi-open resonant photoacoustic cell and a multi-gas simultaneous measurement system. The photoacoustic cell includes multiple resonant cavities. Each resonant cavity has a unique length and a unique resonant frequency, so each resonant cavity corresponds to one to-be-measured gas. A sensitive diaphragm of an acoustic sensor is fixed on one end face of the photoacoustic cell. Photoacoustic signals of different frequencies generated in the resonant cavities act on the sensitive diaphragm of the acoustic sensor, causing the sensitive diaphragm of the acoustic sensor to vibrate periodically. Concentration information of multiple to-be-measured gases can be obtained by analyzing the vibration of the sensitive diaphragm of the acoustic sensor.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: April 12, 2022
    Assignee: DALIAN UNIVERSITY OF TECHNOLOGY
    Inventors: Zhenfeng Gong, Tianli Gao, Yewei Chen, Qingxu Yu
  • MULTI-CAVITY SEMI-OPEN RESONANT PHOTOACOUSTIC CELL AND MULTI-GAS SIMULTANEOUS MEASUREMENT SYSTEM
    Publication number: 20210018430
    Abstract: The present invention belongs to the technical field of trace gas detection, and relates to a multi-cavity semi-open resonant photoacoustic cell and a multi-gas simultaneous measurement system. The photoacoustic cell includes multiple resonant cavities. Each resonant cavity has a unique length and a unique resonant frequency, so each resonant cavity corresponds to one to-be-measured gas. A sensitive diaphragm of an acoustic sensor is fixed on one end face of the photoacoustic cell. Photoacoustic signals of different frequencies generated in the resonant cavities act on the sensitive diaphragm of the acoustic sensor, causing the sensitive diaphragm of the acoustic sensor to vibrate periodically. Concentration information of multiple to-be-measured gases can be obtained by analyzing the vibration of the sensitive diaphragm of the acoustic sensor.
    Type: Application
    Filed: May 28, 2020
    Publication date: January 21, 2021
    Inventors: Zhenfeng Gong, Tianli Gao, Yewei Chen, Qingxu Yu