Nondestructive Evaluation of Moisture Content for Spinach Leaf Powder Using Complex Impedance Spectroscopy

Shekhar, Shubhra; Prasad, Kamlesh

doi:10.13031/ja.14873

Cited by 3 publications

(2 citation statements)

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“…The electrical properties of garlic paper were measured between 0-1000Hz at a constant temperature (25±2°C) using a computerised control precision impedance analyser 6510B (Wayne Kerr Electronics, MA, USA). The garlic pulp was prepared from the peeled garlic without adding water, and electric properties were measured in a similar condition [19]. The electrical conductivity, impedance, and capacitance were measured as a function of frequency.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Characterisation of Allium sativum bulb and its component for high end applications

Prakash,

Shekhar,

Prasad

2023

J. Phys.: Conf. Ser.

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This paper covers selective characterisation of garlic bulb, clove, and tunic based on phyico-chemical, nutritional, phytochemical, optical, electrical, structural, and antimicrobial characteristics of the selected promising variety, Haryana Garlic–17 (HG-17). Organosulphur and phenolic compounds are major phytochemicals attributed to have therapeutic effects. Five organosulphur and fourteen phenolic compounds were identified and qualified using High-Performance Liquid Chromatography (HPLC). These were identified to have antimicrobial capabilities against Staphylococcus aureus, Escherichia coli and Aspergillus niger. The antimicrobial characteristics of garlic extract further revealed its potential for antimicrobial and biomedical applications. The tunic or peel of garlic must be removed before its utilisation for edible purposes. Manual removal of the tunic is a cumbersome process. Therefore, the effect of sodium hydroxide (lye) as a chemical peeling agent on the characteristics of the tunic was further assessed. Treatment of tunics with lye solution improved the recovery of cellulose and hemicelluloses. The prepared garlic peel powder was found to have least one dimension in the nano range, confirmed through Field Emission-Scanning Electron Microscopic. The electrical characterisation of garlic pulp reflected a positive for ohmic heating. On the other hand, treated garlic peel behaved as a potential candidate to be used in the fabrication of paper capacitors as having the capacitance peak found to a maximum near 50Hz frequency.

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Section: Electrical Propertiesmentioning

confidence: 99%

Characterisation of Allium sativum bulb and its component for high end applications

Prakash,

Shekhar,

Prasad

2023

J. Phys.: Conf. Ser.

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“…The capacitance method for measuring water content provides relatively low cost, with a fast response time and comparatively simple structure, which can satisfy the accuracy requirements. The principle is according to varying dielectric constants of foxtail millet with different moisture content, there will be a difference in the capacitance value when passing through the two sides of the pole plate ( Yin, 2018 ; Nath and Ramanathan, 2020 ; Hao et al., 2021 ; Lev et al., 2021 ; Danyang et al., 2022 ; Shekhar and Prasad, 2023 ). Analyse the change of capacitance value when the moisture content of foxtail millet, ambient temperature, and volumetric duty cycle are varied.…”

Section: Introductionmentioning

confidence: 99%

Research on non-destructive and rapid detection technology of foxtail millet moisture content based on capacitance method and Logistic-SSA-ELM modelling

Qiu,

Li,

Huang

et al. 2024

Front. Plant Sci.

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Moisture content testing of agricultural products is critical for quality control, processing efficiency and storage management. Testing foxtail millet moisture content ensures stable foxtail millet quality and helps farmers determine the best time to harvest. A differential capacitance moisture content detection device was designed based on STM32 and PCAP01 capacitance digital converter chip. The capacitance method combined with the back-propagation(BP) algorithm and the extreme learning machine(ELM) algorithm was chosen to construct an analytical model for foxtail millet moisture content, temperature, and volume duty cycle. This work performs capacitance measurements on foxtail millet with different moisture contents, temperatures, and proportions of the measured substance occupying the detection area (that is, the volumetric duty cycle). On this foundation, the sparrow search algorithm (SSA) is used to optimize the BP and ELM models. However, SSA may encounter problems such as falling into local optimization solutions due to the reduction of population diversity in the late iterations. As a consequence, Logistic algorithm is introduced to optimize SSA, making it more appropriate for solving specific problems. Upon comparative analysis, the model predicted using the Logistic-SSA-ELM algorithm was more accurate. The results indicate that the predicted values of prediction set coefficient of determination (RP), prediction set root mean square error (RMSEP) and prediction set ratio performance deviation (RPDP) were 0.7016, 3.7150 and 1.4035, respectively. This algorithm has excellent prediction performance and can be used as a model for detection of foxtail millet moisture content. In view of the important role of foxtail millet moisture content detection in acquisition and storage, it is particularly important to study a nondestructive and fast online real-time detection method. The designed capacitive sensor with differential structure has well stabilization and high accuracy, which can be further studied in depth and gradually move towards the general trend of agricultural development of smart agriculture and precision agriculture.

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Nondestructive Evaluation of Fluid Characteristics using Compact Quarter-Mode SIW Resonator Sensor

Shekhar,

Kumar,

Singh

et al. 2023

J. Phys.: Conf. Ser.

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Novel compact quarter-mode (QM) substrate integrated waveguide (SIW) resonator sensor based on dielectric properties developed. The sensor works on the principle of material perturbation of the cavity resonator. It operates in the broader range of ISM frequency band to characterize various properties of pure liquids, their admixtures, and soluble solids in the solution. The sensor is excited by a 50-ohm microstrip line. A Teflon tube passes through one end of the sensor to hold the material under test (MUT). The variations in the dielectric constant of the material under test shift the resonant frequency. The simulation result shows adequate shifts in resonant frequency and dielectric constant dependent. Thus, this feature of resonate frequency shift assists in determining the component concentration, adulteration, or various properties depending on specific calibration. The findings suggest that the proposed sensor can be successfully applied to determine properties with high precision using a very small amount of fluid in a novel non-destructive approach.

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Nondestructive Evaluation of Moisture Content for Spinach Leaf Powder Using Complex Impedance Spectroscopy

Cited by 3 publications

References 0 publications

Characterisation of Allium sativum bulb and its component for high end applications

Characterisation of Allium sativum bulb and its component for high end applications

Research on non-destructive and rapid detection technology of foxtail millet moisture content based on capacitance method and Logistic-SSA-ELM modelling

Nondestructive Evaluation of Fluid Characteristics using Compact Quarter-Mode SIW Resonator Sensor

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