公开(公告)号：US12123825B2

公开(公告)日：2024-10-22

申请号：US18432313

申请日：2024-02-05

申请人： Anhui University of Science and Technology

发明人： Huawei Jin ,  Xu Wang ,  Haowei Wang

IPC分类号： G01N21/17 ,  G01N1/14 ,  G01N33/00

CPC分类号： G01N21/1702 ,  G01N1/14 ,  G01N33/0027 ,  G01N2021/1704 ,  G01N2201/06113 ,  G01N2201/0636

摘要： Disclosed is a synchronous detection system for a trace nitrogen-oxygen compound based on photoacoustic spectrometry, including a NOx (Nitrogen Oxide) detection air channel, a dust detection air channel and a double-photoacoustic spectrometry detection mechanism which are mutually connected in parallel; the NOx detection air channel includes a background interference detection air pipe, a NO2 detection air pipe and a NO detection air pipe that are mutually connected in parallel, and a NOx photoacoustic detection cavity; and the dust detection air channel includes a dust detection air pipe and a dust photoacoustic detection cavity communicating with the dust detection air pipe.

公开(公告)号：US11940376B2

公开(公告)日：2024-03-26

申请号：US18147236

申请日：2022-12-28

申请人： Anhui University of Science and Technology

发明人： Huawei Jin ,  Fangzheng Yan ,  Lei Fang

IPC分类号： G01N21/17 ,  G01N1/20 ,  G01N1/22 ,  G01N1/24 ,  G01N33/00

CPC分类号： G01N21/1702 ,  G01N1/24 ,  G01N33/0027 ,  G01N2021/1704 ,  G01N2201/06113

摘要： A system for detecting a concentration of free SiO2 in coal dust includes a first sampling tube and a second sampling tube for sampling the coal dust, a three-way control valve communicated with the first sampling tube and the second sampling tube respectively, a photoacoustic spectrometry detection device communicated with the three-way control valve through a connecting pipeline, and a SiO2 reaction tube for reacting SiO2 in the coal dust; and the SiO2 reaction tube is disposed on the second sampling tube. In the present disclosure, a coal dust sampling line is convenient to change by disposing the three-way control valve, and the first sampling tube and the second sampling tube are respectively communicated with the photoacoustic spectrometry detection device, so as to perform a differential accurate detection of the reacted CO content, and to obtain the SiO2 content.

公开(公告)号：US11662301B1

公开(公告)日：2023-05-30

申请号：US17984859

申请日：2022-11-10

申请人： Anhui University of Science and Technology

发明人： Huawei Jin ,  Lei Fang ,  Haowei Wang

IPC分类号： G01N21/17 ,  G01N1/24 ,  E21F17/18

CPC分类号： G01N21/1702 ,  E21F17/18 ,  G01N1/24 ,  G01N2021/1704 ,  G01N2201/06113

摘要： Disclosed are a mine dust real-time detection system based on double-photoacoustic spectrometry and a detection method. The mine dust real-time detection system based on double-photoacoustic spectrometry includes a first sampling unit, a first photoacoustic detection cavity, a second sampling unit, a second photoacoustic detection cavity, a signal unit and a processing unit; the first sampling unit is used for sampling in respective, the first photoacoustic detection cavity provides a photoacoustic effect field to substances sampled by the first sampling unit, the second sampling unit is used for sampling in respective, the second photoacoustic detection cavity provides the photoacoustic effect field to substances sampled by the second sampling unit, the signal unit is used for providing a laser signal, and the processing unit is used for collecting and processing a photoacoustic signal.