Carbon Dioxide Sensor Module Based on NDIR Technology

Zhou, Libing; He, Yaoyi; Zhang, Qing; Zhang, Lei

doi:10.3390/mi12070845

Cited by 15 publications

(4 citation statements)

References 27 publications

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“…However, the chromatographic analysis conditions often vary under different experimental conditions. Besides, standard gas needs to be configured during the measurement process, and pure nitrogen is generally used for the standard gas, which not only undergoes a cumbersome process but also requires a long operation period; the electrochemical method has high sensitivity, good accuracy, simple instrument but poor selectivity; NDIR technology possesses good selectivity and a fast response speed for CO 2 detection [ 30 , 31 ], and is mostly used in indoor environmental monitoring, industrial production emission monitoring and other scenarios [ 32 , 33 ]. Based on the above comparison, this article chooses NDIR technology and compares a variety of CO 2 sensors using this technology as shown in Table 3 .…”

Section: Methodsmentioning

confidence: 99%

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Liu

Chen

Fan

et al. 2022

Sensors

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The problem of air pollution is an increasingly serious worldwide. Therefore, in order to better monitor the gas components in the atmosphere, the design of a gas monitoring terminal based on a quadrotor UAV, including software and hardware design, is hereby carried out. Besides, a pump-suction series cavity is designed to reduce the influence of airflow disturbance on the UAV, which is verified to possess a certain anti-interference ability through Computational Fluid Dynamics(CFD) simulation experiments. In addition, a linear regression algorithm is used for sensor calibration and a polynomial piecewise regression method is used for temperature compensation. The experimental results show that the R2 of the model reaches 0.9981, the fitting degree is rather high, and the output is closer to the real gas concentration value after calibration. At the same time, the temperature compensation parameters are determined, which considerably improves the accuracy of the entire hardware terminal. Finally, the vehicle exhaust monitoring experiment is conducted, and the experimental results show that this scheme can successfully detect the exhaust position of the vehicle exhaust under the interference of the downwash flow of the UAV, thereby proving the reliability and accuracy of the monitoring terminal.

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Section: Methodsmentioning

confidence: 99%

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Liu

Chen

Fan

et al. 2022

Sensors

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“…Fourier transform and filter photometer instruments are non-dispersive in the sense that they do not use a grating or prism to disperse radiation into its component wavelengths. An example of a filter photometer is a non-dispersive infrared (NDIR) sensor used to detect gases such as CO and CO 2 [27][28][29]. The majority of NDIR sensors use broadband lamps or LED sources and an optical filter to select a narrow-band spectral region that overlaps with the absorption region of the gas of interest [30,31].…”

Section: Instrumentation Backgroundmentioning

confidence: 99%

Measurement of Light-Duty Vehicle Exhaust Emissions with Light Absorption Spectrometers

Giechaskiel,

Melas,

Franzetti

et al. 2024

Technologies

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Light-duty vehicle emission regulations worldwide set limits for the following gaseous pollutants: carbon monoxide (CO), nitric oxides (NOX), hydrocarbons (HCs), and/or non-methane hydrocarbons (NMHCs). Carbon dioxide (CO2) is indirectly limited by fleet CO2 or fuel consumption targets. Measurements are carried out at the dilution tunnel with “standard” laboratory-grade instruments following well-defined principles of operation: non-dispersive infrared (NDIR) analyzers for CO and CO2, flame ionization detectors (FIDs) for hydrocarbons, and chemiluminescence analyzers (CLAs) or non-dispersive ultraviolet detectors (NDUVs) for NOX. In the United States in 2012 and in China in 2020, with Stage 6, nitrous oxide (N2O) was also included. Brazil is phasing in NH3 in its regulation. Alternative instruments that can measure some or all these pollutants include Fourier transform infrared (FTIR)- and laser absorption spectroscopy (LAS)-based instruments. In the second category, quantum cascade laser (QCL) spectroscopy in the mid-infrared area or laser diode spectroscopy (LDS) in the near-infrared area, such as tunable diode laser absorption spectroscopy (TDLAS), are included. According to current regulations and technical specifications, NH3 is the only component that has to be measured at the tailpipe to avoid ammonia losses due to its hydrophilic properties and adsorption on the transfer lines. There are not many studies that have evaluated such instruments, in particular those for “non-regulated” worldwide pollutants. For this reason, we compared laboratory-grade “standard” analyzers with FTIR- and TDLAS-based instruments measuring NH3. One diesel and two gasoline vehicles at different ambient temperatures and with different test cycles produced emissions in a wide range. In general, the agreement among the instruments was very good (in most cases, within ±10%), confirming their suitability for the measurement of pollutants.

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“…[9][10][11][12][13] Nondispersive infrared (NDIR) spectrometry is widely employed as a prevalent technique for CO 2 gas detection and relies on the principle of absorption of a particular infrared wavelength by the molecules of the gas. [14][15][16] The CO 2 concentration can be determined from the difference between the intensity of radiated and received IR light, as postulated by Beer-Lambert law. [17,18] However, there are notable challenges associated with the passage of IR light through a tube filled with a gaseous analyte, including a low detection limit and susceptibility to interference from high levels of humidity.…”

Section: Introductionmentioning

confidence: 99%

Fine‐Tunable CO₂ Colorimetric Sensors and CO₂ Level Indicator Meter with Horizontal Linear Gauge via Inter‐Chain Spacers

Kim,

Hwang,

Koh

et al. 2024

Adv Materials Technologies

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Fine‐tuning the sensing properties of carbon dioxide (CO2) colorimetric sensors is a challenging task. In this study, a short synthetic route is developed for CO2‐responsive nanoparticles with diverse sensitivity and detection range across a wide range of CO2 concentrations. This involves the addition of oily liquids as inter‐chain spacers, which changes the diffusivity of CO2 gas into the sensing matrices without other chemical modifications. R values and the limit of detection (LOD) are estimated from Euclidean distance (ED) curves, indicating a ten‐fold difference in sensitivity. Optical and physical analyses revealed that these results arise from intercalating inter‐chain spacers between polymeric chains and modifying the gas diffusivity. Furthermore, the sensitivity and detection range can be easily tuned by mixing two CO2‐responsive nanoparticles having different inter‐chain spacers, allowing the fabrication of the sensors with subtle differences in sensitivity and detection range. Based on these results, a CO2 level meter with a horizontal linear gauge that allows visible identification of the level of CO2 over the entire range of CO2 concentrations (from 0% to 100%) is developed. Consequently, the findings will be helpful in achieving a better understanding of gas information and finding an effective way to control the characteristics of colorimetric sensors.

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Carbon Dioxide Sensor Module Based on NDIR Technology

Cited by 15 publications

References 27 publications

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Measurement of Light-Duty Vehicle Exhaust Emissions with Light Absorption Spectrometers

Fine‐Tunable CO₂ Colorimetric Sensors and CO₂ Level Indicator Meter with Horizontal Linear Gauge via Inter‐Chain Spacers

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Carbon Dioxide Sensor Module Based on NDIR Technology

Cited by 15 publications

References 27 publications

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Design of Gas Monitoring Terminal Based on Quadrotor UAV

Measurement of Light-Duty Vehicle Exhaust Emissions with Light Absorption Spectrometers

Fine‐Tunable CO2 Colorimetric Sensors and CO2 Level Indicator Meter with Horizontal Linear Gauge via Inter‐Chain Spacers

Contact Info

Product

Resources

About

Fine‐Tunable CO₂ Colorimetric Sensors and CO₂ Level Indicator Meter with Horizontal Linear Gauge via Inter‐Chain Spacers