Measurement of diesel exhaust fluid concentration in urea-SCR after-treatment system

Gurusamy, PalaniKumar; Uma, G.; Umapathy, M.

doi:10.1007/s12541-017-0127-z

Cited by 9 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It requires, to perform measurements on a wide frequency range (from 40 Hz to 110 MHz), an electrical spectrum analyzer that is expensive and not suitable for a compact or portable sensor. In [8], the authors have proposed an ultrasonic sensor, but its resolution is limited since it cannot detect changes in concentration of urea in DEF lower than 1%. In [9], the authors have reported a platinum thin-film sensor in combination with the 3ω method to determine the concentration of urea in DEF with a resolution of only 1% by weight of urea.…”

Section: Discussionmentioning

confidence: 99%

“…Other DEF quality sensors were reported in the literature for measuring urea concentration, based on optical principles [5,6], electrical factors [7], and ultrasonic measurements [8].…”

Section: Introductionmentioning

confidence: 99%

“…In [8], Gurusamy et al developed a system for detecting the concentration of urea in DEF. The design involves a piezoelectric ultrasound transmitter and a receiver; the measurement can be performed either by measuring the time of flight of ultrasound waves between transmitter and receiver or by measuring the amplitude of the received signal in terms of frequency using a voltage-to-frequency converter.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Anelli,

Pellicorio,

Bello

et al. 2024

Sensors

View full text Add to dashboard Cite

Contactless and label-free detection of urea content in aqueous solutions is of great interest in chemical, biomedical, industrial, and automotive applications. In this work, we demonstrate a compact and low-cost instrumental configuration for label-free, reagent-free, and contactless detection of urea dissolved in water, which exploits the absorption properties of urea in the near-infrared wavelength region. The intensity of the radiation transmitted through the fluid under test, contained in a rectangle hollow glass tubing with an optical pathlength of 1 mm, is detected in two spectral bands. Two low-cost, low-power LEDs with emission spectra centered at λ = 1450 nm and λ = 2350 nm are used as readout sources. The photodetector is positioned on the other side of the tubing, in front of the LEDs. The detection performances of a photodiode and of a thermal optical power detector have been compared, exploiting different approaches for LED driving current modulation and photodetected signal processing. The implemented detection system has been tested on urea–water solutions with urea concentrations from 0 up to 525 mg/mL as well as on two samples of commercial diesel exhaust fluid (“AdBlue™”). Considering the transmitted intensity in presence of the urea–water solution, at λ = 1450 nm and λ = 2350 nm, normalized to the transmitted intensity in presence of water, we demonstrate that their ratio is linearly related to urea concentration on a wide range and with good sensitivity.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Other DEF quality sensors were reported in the literature for measuring urea concentration, based on optical principles [5,6], electrical factors [7], and ultrasonic measurements [8].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Anelli,

Pellicorio,

Bello

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…Inappropriate DEF brakes the SCR or breaks it down and the emission reduction fails. Reported DEF quality sensors are based on optical principles (Kumawat et al, 2014) and electrical (Fendri et al, 2015), ultrasonic (Gurusamy et al, 2017), and pulsed heating mea-surements (Schmitt et al, 2014). These sensors can often solely measure the concentration and sometimes the filling level in the tank.…”

Section: Introductionmentioning

confidence: 99%

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3<i>ω</i> method

Bernhardsgrütter

Hepp

Jägle

et al. 2021

J. Sens. Sens. Syst.

View full text Add to dashboard Cite

Abstract. Because diesel combustion processes produce harmful detrimental nitrous oxides, the selective catalytic reduction, an after-treatment method using diesel exhaust fluid (AdBlue) to reduce these emissions, is an important part in the cycle of the combustion process. Therefore, it is crucial to continuously monitor the quality of the diesel exhaust fluid to secure the ideal selective catalytic reduction. This article presents a platinum thin-film sensor using the 3ω method which is able to characterize the diesel exhaust fluid. By means of the 3ω method, information about the concentration of urea in water can be extracted. In this investigation, a digital lock-in amplification technique is used to execute the measurements. The results show that this sensor can determine the urea content within 1 % by weight. Moreover, besides the analysis of the 3ω signal, the 1ω signal is analyzed in depth to receive additional information about the temperature. Because the same structure can measure multiple parameters, such as concentration, temperature, and flow, the sensor might be a good alternative to the state-of-the-art diesel exhaust fluid sensor.

show abstract

Performance Improvement of a Pressure Sensor Using Fast Median Algorithm

Park

Lee

2022

Int. J. Precis. Eng. Manuf.

View full text Add to dashboard Cite

Measurement of diesel exhaust fluid concentration in urea-SCR after-treatment system

Cited by 9 publications

References 14 publications

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3<i>ω</i> method

Performance Improvement of a Pressure Sensor Using Fast Median Algorithm

Contact Info

Product

Resources

About

Measurement of diesel exhaust fluid concentration in urea-SCR after-treatment system

Cited by 9 publications

References 14 publications

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Label- and Reagent-Free Optical Sensor for Absorption-Based Detection of Urea Concentration in Water Solutions

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3&lt;i&gt;ω&lt;/i&gt; method

Performance Improvement of a Pressure Sensor Using Fast Median Algorithm

Contact Info

Product

Resources

About

Inline quality monitoring of diesel exhaust fluid (AdBlue) by using the 3<i>ω</i> method