Development and testing of a hardware platform for measuring instruments based on near-infrared diffuse reflection

Gentilin, Fabio Augusto; Kobo, Bruna Tiemi; Ribeiro, Lucas de Souza; França, José Alexandre de; Felício, Ana Lúcia de Souza Madureira; França, Maria Bernadete de Morais; Filho, Dari de Oliveira Toginho

doi:10.1016/j.measurement.2016.02.047

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…In the literature, we can highlight other authors who also proposed prototypes that measure the absorption of light in wavelengths in the near-infrared range using LEDs as the light source. Examples of these prototypes can be found in the works of Ribeiro et al [15], Moreira et al [16], and da Silva Dias et al [17] for the quantification of water in milk; the work of Gentilin et al [18], for the measurement of moisture in coffee powder; and the work of Moreira et al [19], for the quantification of ethanol in gasoline. In these works [15]- [19], the absorption of radiation was observed in fewer than five different wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Development, Testing, and Validation of a Prototype for Qualification of Substances Based on Near-Infrared Spectroscopy

2019

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Some commercial equipment used to qualify substances in complex mixtures employs the principle of observation of the interaction of these substances with electromagnetic radiation. The chemical bonds present in the molecules of the substance absorb specific wavelengths, allowing for extracting important information about the physical properties of the analyzed element. However, such equipment is expensive, hampering access to it. With new optoelectronic components available in the market, it is possible to develop devices with the same operating principle of commercial equipment. With this in mind, several authors have suggested prototypes with a lower cost that are applicable to the ultraviolet and visible range, making their development less complex. This paper presents the development of an optoelectronic prototype for substance qualification using LEDs as the light source, with emission in the range of 1400-2250 nm (nearinfrared range). A GaInAsSb-based photodiode was used to detect the signal. The sampling mode used in the development of this work was diffuse reflection, which is applicable to non-homogeneous substances. Bandpass filters were employed to validate the methodology, where the results show that the prototype can perceive the variation of the intensity of the spectrum received by the sensor. INDEX TERMS Optoelectronic devices, instrumentation and measurement, infrared sensor, optical filters, light emitting diodes. The associate editor coordinating the review of this manuscript and approving it for publication was Jiang Wu.

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Section: Introductionmentioning

confidence: 99%

Development, Testing, and Validation of a Prototype for Qualification of Substances Based on Near-Infrared Spectroscopy

2019

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“…However, these types of optical components make this type of solution still expensive for largescale use. Finally, another category of equipment are those based on optical filters or LEDs, which enable the design of instruments with discrete wavelengths of narrow spectral bands [6][7][8][9]. In this case, they generally correspond to dedicated instruments for specific applications, in which a small number of wavelengths is required for the analytical determination.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the influence of sample variability on the calibration of a NIR photometer for quantification of ethanol in gasoline

Moreira¹,

Felício²,

França³

2019

Meas. Sci. Technol.

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The calibration of a NIR photometer for analysis of liquid substances aims to find a curve that relates the concentration of some analyte with spectral data collected from the samples. However, the measured optical signals depend not only on the concentration of the analyte of interest, so that the quality of the calibration also depends on the natural variability of samples and on the way the optical data are processed and modeled. This paper presents a study on the influence of these two factors on the calibration of a LED-NIR photometer, which was applied to the quantification of ethanol in gasoline, and compares the results obtained by the prototype with those obtained by a commercial spectrophotometer. We used two distinct procedures for selecting the calibration samples, in order to evaluate the influence of the sample matrix, considering two different methods of determining the absorbances from the optical data. Experimental results showed that the calibration samples must be prepared and selected with uniform distribution in relation to the different sources of variance, in order to make the equipment able to accurately predict future samples. The performance of the prototype was very close to the one of the commercial equipment, with a difference in root mean square errors of less than 0.8% in the concentration (v/v) of ethanol.

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“…Several attempts have been proposed to reduce the financial barrier of implementing spectroscopic analysis by replacing an expensive halogen lamp with wavelength selective light emitting diodes (LEDs) and a detector by photodiodes [9][10][11][12][13]. Even though the proposed alternative does not require accurate alignment of the components to guarantee high precision measurements as a commercial spectrometer needs [12], it is worth to highlight that only limited wavelengths can be measured because only wavelength selective light emitting diodes (LEDs) were used in the proposed measurement device.…”

Section: Introductionmentioning

confidence: 99%

“…Even though the proposed alternative does not require accurate alignment of the components to guarantee high precision measurements as a commercial spectrometer needs [12], it is worth to highlight that only limited wavelengths can be measured because only wavelength selective light emitting diodes (LEDs) were used in the proposed measurement device. On the other hand, a recent work has presented a simple and inexpensive designs to acquire visible spectrum with acceptable accuracy [14].…”

Section: Introductionmentioning

confidence: 99%

Design and Development of a Shortwave near Infrared Spectroscopy using NIR LEDs and Regression Model

Chia

Tan

2017

IJECE

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Near infrared (NIR) spectroscopic technology has been getting more attention in various fields. The development of a low cost NIR spectroscopy is crucial to reduce the financial barriers so that more NIR spectroscopic applications will be investigated and developed by means of the NIR spectroscopic technology. This study proposes an alternative to measure shortwave NIR spectrum using one collimating lens, two slits, one NIR transmission grating, one linear array sensor, and one microcontroller. Five high precision narrow bands NIR light emitting diodes (LEDs) were used to calibrate the proposed spectroscopy. The effects of the proposed two slits design, the distance between the grating and linear array sensor, and three different regression models were investigated. The accuracy of the proposed design was cross-validated using leave-one-out cross-validation. Results show that the proposed two slits design was able to eliminate unwanted signals substantially, and the cross-validation was able to estimate the best model with root mean squared error of cross-validation of 3.8932nm. Findings indicate that the cross-validation approach is a good approach to estimate the final model without over-fitting, and the proposed shortwave NIR spectroscopy was able to estimate the peak value of the acquired spectrum from NIR LEDs with RMSE of 1.1616nm. [4], and food industry [5] to potentially replace conventional measurement approaches (e.g. sensory evaluation and chemical analysis) that are timeconsuming, expensive per measurement, destructive, or inconvenient. Near infrared spectroscopic technology is promising to be an alternative measurement approach because the acquired reflected or the transmitted near infrared energy from a sample contains information that related to the composition of C-H, N-H, and O-H bonds of the sample. Since these composition are the common and basic chemical composition of many products e.g. agriculture products and food, many researches have been conducted to investigate the relationship between a component of interests e.g. pH, glucose, and soluble solids content and the near infrared energy. Keyword: NIR LEDNear Infrared Spectroscopic research aims to relate the component of interest to the absorption of the near-infrared light energy. The amount of the absorption is related to the chemical bond of molecule. In fact, the bond among atoms naturally will vibrate, the higher state of excitement requires more energy. Light

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Development and testing of a hardware platform for measuring instruments based on near-infrared diffuse reflection

Cited by 6 publications

References 21 publications

Development, Testing, and Validation of a Prototype for Qualification of Substances Based on Near-Infrared Spectroscopy

Development, Testing, and Validation of a Prototype for Qualification of Substances Based on Near-Infrared Spectroscopy

Evaluation of the influence of sample variability on the calibration of a NIR photometer for quantification of ethanol in gasoline

Design and Development of a Shortwave near Infrared Spectroscopy using NIR LEDs and Regression Model

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