|
| Response Law of Two Kinds of NDIR CO2 Sensor in Hyperbaric Environment |
| |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.07.017 |
| KeyWord:high pressure non-dispersive infrared carbon dioxide sensor response law signal drift |
| Author | Institution |
| FANG Jing-jing |
Navy Medical Center, Shanghai , China |
| REN Xiao-meng |
Navy Medical Center, Shanghai , China |
| XU Xin-hong |
Navy Medical Center, Shanghai , China |
| JIANG Lu |
Navy Medical Center, Shanghai , China |
| WANG Shi-feng |
Navy Medical Center, Shanghai , China |
| MA Jun |
Navy Medical Center, Shanghai , China |
| YAN Shuo |
Navy Medical Center, Shanghai , China |
| FANG Yi-qun |
Navy Medical Center, Shanghai , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The influence of pressure-changing environment on NDIR CO2 gas sensor was studied by using a small pressurized chamber, and the response variation law of the sensor in different pressure ranges was obtained thus. Under the condition of constant partial pressure of CO2, N2 static slow pressurization and impact fast pressurization were used respectively to study the fluctuation law of such performance indexes as stability time and drift of the two sensors, one is the C20 sensor made in Britain and the other is G4 sensor made in China The response law of the sensor to the changes of pressure and temperature was investigated, and the pressure compensation scheme under high pressure was proposed. When the pressure was lower than 60 meters, the mechanical damage did not occur but the signal drifted greatly. G4 sensor had a phenomenon of signal oscillation. The concentration output value of the two CO2 sensors and the whole machine increased with the pressure, and the ratio of the standard gas sample value to the measured value was close to the form of power function, besides, the output concentration value of the two sensors was larger than that of the whole machine. In conclusion, the pressure response law under different partial pressure of CO2 concentration shows good consistency. The signal drift of sensor under impact fast pressurization is more significant than that of N2 static slow pressurization. Moreover, the true value of concentration can be corrected by measuring total pressure and built-in multiple functions. |
| Close |
|
|
|