Single-Frequency-Based Dry Rubber Content Determination Technique for In-Field Measurement Application

Julrat, Sakol; Chongcheawchamnan, M.; Khaorapapong, Thanate; Patarapiboolchai, Orasa; Kririksh, Monai; Robertson, I.D.

doi:10.1109/jsen.2012.2208454

Cited by 25 publications

(16 citation statements)

References 31 publications

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“…2. The concept of the measurement system is similar to an in-field DRC measurement system [9] that uses a SSPR. A DSPR based on a sampled-line six-port network topology is chosen because of its low complexity.…”

Section: Differential Measurement System For Drc Determinationmentioning

confidence: 99%

“…Several attempts to improve the performance of the previously mentioned DRC measurement techniques have been made [2][3][4][5][6][7][8][9][10]. These research works were developed based on electrical measurement for obtaining a quick and automatic measurement.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a microwave multiport reflectometer technique was proposed for determining the qualities of agriculture products owing to its low complexity system [9,11]. A low-cost DRC system based on a six-port microwave reflectometer was reported in [9].…”

Section: Introductionmentioning

confidence: 99%

“…A low-cost DRC system based on a six-port microwave reflectometer was reported in [9]. Since rubber latex has water as the main component, which is fundamentally sensitive to the ambient temperature, measuring the dielectric permittivity of rubber latex fundamentally requires multiple parameters to determine accurate DRC results.…”

Section: Introductionmentioning

confidence: 99%

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Differential six‐port reflectometer for determining dry rubber content of latex

Julrat¹,

Chongcheawchamnan

Robertson³

2015

IET Microwaves, Antennas & Propagation

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This study presents the application of a differential six-port reflectometer to the design of a portable system for measurement of the dry rubber content (DRC) of latex. The proposed DRC measurement system consists of a 1 GHz reflectometer used with an open-ended coaxial-probe sensor, a temperature sensor, a display and a microcontroller. The complex permittivity and temperature of the rubber latex are measured, and a temperature-dependent model for DRC determination based on a dielectric mixture theory is used. The reflectometer performance is verified by comparing the measured complex permittivity with the results obtained from a commercial dielectric measurement system. Finally, the accuracy of the DRC measurement system is assessed by comparing the measured DRCs from different latex samples over the range of 10-40°C with the standard oven-drying method.

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Section: Differential Measurement System For Drc Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Differential six‐port reflectometer for determining dry rubber content of latex

Julrat¹,

Chongcheawchamnan

Robertson³

2015

IET Microwaves, Antennas & Propagation

Self Cite

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“…The selection between transmission-line and resonance techniques predominantly depends on the material to be measured, the required measurement accuracy and the operational frequency. Generally, resonance methods were used for solids characterization [14] because it basically determines the dielectric property from resonance frequency and quality factor. Recently, they can also be used for liquid material detection and quantification, offering a good measurement accuracy [15]- [17].…”

mentioning

confidence: 99%

Nano-Fluidic Millimeter-Wave Lab-on-a-Waveguide Sensor for Liquid-Mixture Characterization

et al. 2018

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Abstract-This paper reports on a miniaturized lab-on-awaveguide liquid-mixture sensor, achieving highly-accurate nanoliter liquid sample characterization, for biomedical applications. The nanofluidic-integrated millimeter-wave sensor design is based on near-field transmission-line technique implemented by a single loop slot antenna operating at 91 GHz, fabricated into the lid of a photolaser-based subtractive manufactured WR-10 rectangular waveguide. The nanofluidic subsystem, which is mounted on top of the antenna aperture, is fabricated by using multiple Polytetrafluoroethylene (PTFE) layers to encapsulate and isolate the liquid sample during the experiment, hence, offering various preferable features e.g. noninvasive and contactless measurements. Moreover, the sensor is reusable by replacing only the nanofluidic subsystem, resulting a cost-effective sensor. The novel sensor can measure a liquid volume of as low as 210 nanoliters, while still achieving a discrimination accuracy of better than 2% of ethanol in the ethanol/deionized-water liquid mixture with a standard deviation of lower than 0.008 from at least three repeated measurements, resulting in the highest accurate ethanol and DI-water discriminator reported to date. The nanofluidic-integrated millimeter-wave sensor also offers other advantages such as ease of design, low fabrication and material cost, and no life-cycle limitation of the millimeter-wave subsystem.Index Terms-biomedical liquid mixtures, nanofluidic, millimeter-wave sensor, transmission line method, W-band.

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