The NDIR&lt;tex&gt;$hboxCO_2$&lt;/tex&gt;Monitor With Smart Interface for Global Networking

Wang, Yanfeng; Nakayama, M.; Yagi, Masahiro; Nishikawa, Masahiro; Fukunaga, M.; Watanabe, Kentaro

doi:10.1109/tim.2005.851474

Cited by 44 publications

(18 citation statements)

References 12 publications

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“…IR wavelength passes through a reference cell and is absorbed by CO 2 in a sample cell. Absorbency is indicated on the IR Detector, and then converted and amplified to calculate concentration (Wang et al 2005;Frodl and Tille 2006).…”

Section: Gas Analysis Methodsmentioning

confidence: 99%

A study on carbon dioxide emissions from bituminous coal in Korea

et al. 2013

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Consumption of primary energy in Korea increased 5.25 % per year over a 10 years span starting in 1990. Korea ranked 8th in primary energy consumption in 2011; coal consumption increased 35 % from 87,827 million tons in 2006-119,321 tons in 2010. Heavy energyconsuming countries consistently conduct research to develop an emission factor of Tier 2 level, reflecting the characteristics of the fuel that they use. To calculate the emission factor of bituminous coal for fuel, this study developed emission factor and calculated emission amount by implementing fuel analysis on bituminous coal consumed in Korea between 2007 and 2009. CO 2 emission factor calculated by fuel analysis method is 95,315 kg/TJ, which is 0.75 % higher than the default value suggested by IPCC. The emission amount calculated by using the CO 2 emission factor in this study is 231.881 million tons, which has a difference of 1.739 million tons compared to the IPCC default value.

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Section: Gas Analysis Methodsmentioning

confidence: 99%

A study on carbon dioxide emissions from bituminous coal in Korea

et al. 2013

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“…The gas flow monitoring is based on the Bernoulli law and is achieved by measuring differential pressure with a pressure sensor. The CO

concentration is based on the principle of light absorption with a pyroelectric sensor in the infrared region, which is known as non-dispersive infrared absorption (NDIR) [ 16 , 17 , 18 , 19 ]. There are two types of techniques used for respiratory monitoring: mainstream and sidestream.…”

Section: Introductionmentioning

confidence: 99%

A Low-Power and Portable Biomedical Device for Respiratory Monitoring with a Stable Power Source

Yang

Chen

Zhou

et al. 2015

Sensors

113

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Continuous respiratory monitoring is an important tool for clinical monitoring. Associated with the development of biomedical technology, it has become more and more important, especially in the measuring of gas flow and CO2 concentration, which can reflect the status of the patient. In this paper, a new type of biomedical device is presented, which uses low-power sensors with a piezoresistive silicon differential pressure sensor to measure gas flow and with a pyroelectric sensor to measure CO2 concentration simultaneously. For the portability of the biomedical device, the sensors and low-power measurement circuits are integrated together, and the airway tube also needs to be miniaturized. Circuits are designed to ensure the stability of the power source and to filter out the existing noise. Modulation technology is used to eliminate the fluctuations at the trough of the waveform of the CO2 concentration signal. Statistical analysis with the coefficient of variation was performed to find out the optimal driving voltage of the pressure transducer. Through targeted experiments, the biomedical device showed a high accuracy, with a measuring precision of 0.23 mmHg, and it worked continuously and stably, thus realizing the real-time monitoring of the status of patients.

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“…One thermopile monitors the intensity of light through an optical bandpass filter with 4.0 µm center wavelength, and the other measures the IR absorption due to CO 2 concentration through an optical bandpass filter with a 4.26 µm center wavelength. The difference of these two raw signals provides the sensor output [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Development of an NDIR CO2 Sensor-Based System for Assessing Soil Toxicity Using Substrate-Induced Respiration

Kaur

Adamchuk

Whalen

et al. 2015

Sensors

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The eco-toxicological indicators used to evaluate soil quality complement the physico-chemical criteria employed in contaminated site remediation, but their cost, time, sophisticated analytical methods and in-situ inapplicability pose a major challenge to rapidly detect and map the extent of soil contamination. This paper describes a sensor-based approach for measuring potential (substrate-induced) microbial respiration in diesel-contaminated and non-contaminated soil and hence, indirectly evaluates their microbial activity. A simple CO2 sensing system was developed using an inexpensive non-dispersive infrared (NDIR) CO2 sensor and was successfully deployed to differentiate the control and diesel-contaminated soils in terms of CO2 emission after glucose addition. Also, the sensor system distinguished glucose-induced CO2 emission from sterile and control soil samples (p ≤ 0.0001). Significant effects of diesel contamination (p ≤ 0.0001) and soil type (p ≤ 0.0001) on glucose-induced CO2 emission were also found. The developed sensing system can provide in-situ evaluation of soil microbial activity, an indicator of soil quality. The system can be a promising tool for the initial screening of contaminated environmental sites to create high spatial density maps at a relatively low cost.

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The NDIR<tex>$hboxCO_2$</tex>Monitor With Smart Interface for Global Networking

Cited by 44 publications

References 12 publications

A study on carbon dioxide emissions from bituminous coal in Korea

A study on carbon dioxide emissions from bituminous coal in Korea

A Low-Power and Portable Biomedical Device for Respiratory Monitoring with a Stable Power Source

Development of an NDIR CO2 Sensor-Based System for Assessing Soil Toxicity Using Substrate-Induced Respiration

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