Exposure protocol setup for agro food treatment. Method and system for developing an application for heating in reverberation chamber

Paolanti, Marina; Pollini, Rama; Frontoni, Emanuele; Mancini, Adriano; Лео, Роберто Де; Zingaretti, Primo; Bisceglia, Bruno

doi:10.1109/mms.2015.7375372

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…This is the result of microwave action and soil heat conduction, which is consistent with the soil model temperature simulation results presented in this paper. The skin effect is unavoidable in the process of microwave soil disinfection, so the penetrability of microwaves is not infinite, resulting in a maximum temperature value in the soil under the action of microwaves, which often appears a few centimeters below the surface [54]. The penetration degree of microwaves during soil irradiation depends on the soil loss factor ε", which can be expressed by Equation (8) as:…”

Section: Long-term Microwave Action Soil Irradiation Depth Test Resultsmentioning

confidence: 99%

Simulations and Experiments of Soil Temperature Distribution after 2.45 GHz Long-Term Microwave Treatment

Sun

Zhao²,

Yang³

et al. 2022

Agriculture

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Soil disinfection is an important agronomic measure to prevent soil-borne diseases, insects, weeds and other hazards. Based on the premise of being environmentally friendly, microwave soil disinfection can improve crop yield and quality in a pollution-free, residue-free and green way. The law of microwave soil heating is the theoretical basis of microwave soil disinfection. Therefore, in this paper, loess soil of North China and black soil of Northeast China are used as test materials to explore the law of soil heating under the action of microwaves. First, COMSOL Multiphysics software was used to simulate the temperature field change in the microwave-irradiated soil, and a simulation model of the temperature field of the microwave-irradiated soil was constructed to analyze the effective working range and temperature distribution characteristics of the microwave-irradiated soil. Second, using the 2.45 GHz microwave treatment, the following conditions were tested: soil moisture conditions of 10%, 15%, 20% and 23% (within the natural moisture content range). The loess and black soil were treated by microwave irradiation for 1~12 min, respectively (1 min/time increment). A single-factor experiment was designed to explore the influence of these factors on the soil heating law. The results show that the two soil surface temperatures are positively correlated with the soil moisture content, both of which satisfy Tsurface23% > Tsurface20% > Tsurface15% > Tsurface10%, and the surface temperature of black soil is higher than that of loess. According to the experimental results of the internal temperature distribution of loess and black soil irradiated by microwaves, the surface equations of “irradiation time–soil depth-soil temperature” and “irradiation time–soil moisture content–soil temperature” were constructed by surface fitting. When the irradiation time and moisture conditions are the same, the average temperature inside the irradiation area satisfies T¯α black soil > T¯α loess. The results of long-term microwave soil heating preliminarily confirmed the feasibility of microwave soil disinfection and the optimal conditions of microwave irradiation in loess of North China and Northeast black soil, which provides a certain reference for the study of soil-borne diseases inactivation at high temperature.

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Section: Long-term Microwave Action Soil Irradiation Depth Test Resultsmentioning

confidence: 99%

Simulations and Experiments of Soil Temperature Distribution after 2.45 GHz Long-Term Microwave Treatment

Sun

Zhao²,

Yang³

et al. 2022

Agriculture

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“…Moreover, thanks to this model, we will develop an application that simulates the heating of an object in a reverberation chamber. This application makes it easy for non-electromagnetic personnel to employ the mathematical models, it can visualise the distribution of temperature in objects to be treated and it is possible to insert the power to be transmitted in the chamber [28].…”

Section: Discussionmentioning

confidence: 99%

“…In our specific case, the block is made of wood and the sphere is made of water. This choice is due to the dielectric characteristics of biological agents, infesting wooden artifacts, which is similar to water [28].…”

Section: Methodsmentioning

confidence: 99%

Accurate Modeling of the Microwave Treatment of Works of Art

et al. 2019

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The microwave heating treatment is a useful methodology and the disinfestation of works of art can also benefit from this approach. However, even if the microwave treatment is able to eliminate the pests that could damage the works of arts, it may nevertheless present some unexpected effects such as the presence of highly heated areas (hot spots) or areas with poor radiation due to particular shapes. To overcome this issue, we developed a mathematical model allowing predicting and monitoring tasks about the heating process. The prediction model has been developed into a software solution able to predict the distribution of heating power in objects to be treated, even of complex shapes, in order to define the exposure conditions, the time necessary to the processing, the power to be transmitted in the chamber and any repair or protection to cover the most sensitive areas. It can also predict the behaviour of irradiation in the presence of other entities such as nails or pests. The data to be provided for performing a simulation are: the geometry of the object, the shape of the infesting agent and their dielectric characteristics. As a result, we obtain the distribution of heating power and a software tool able to model and predict activities for cultural heritage treatments.

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“…Indeed, these measurements take advantage of the statistically uniform and isotropic fields inside the working volume of the chamber, thanks to various stirring processes [2]. Recently, these attractive properties also found applications in various domains such as antenna characterization [3], [4], 4G throughput measurement [5], and agro food treatment [6].…”

Section: Introductionmentioning

confidence: 99%

Accurate Characterization of Reverberation Chamber Resonant Modes From Scattering Parameters Measurement

Sarrazin

Richalot

2020

IEEE Trans. Electromagn. Compat.

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This paper presents a novel approach to accurately extract the resonant modes of a mode-stirred Reverberation Chamber (RC) from measured transmission coefficient. This approach neither requires measurements with a fine stirrer rotation step nor assumes the pole continuity over a stirrer rotation. First, the number of modes to be extracted by the Matrix Pencil method needs to be overestimated in order to obtain most of the true (physical) modes with high accuracy. As this overestimation also implies the extraction of many spurious modes, the second step consists in automatically filtering these spurious modes based on a time-window increasing technique post-process without a priori information. Performances of the introduced technique are first shown on a didactic example, especially in the presence of noise, and its limitations when increasing the modal overlap are investigated. Results obtained from measurement performed in a chaotic RC are then presented. The introduced approach allows extracting all the true cavity modes from measurement data while keeping the percentage of spurious modes below 3.5 %.

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Exposure protocol setup for agro food treatment. Method and system for developing an application for heating in reverberation chamber

Cited by 4 publications

References 12 publications

Simulations and Experiments of Soil Temperature Distribution after 2.45 GHz Long-Term Microwave Treatment

Simulations and Experiments of Soil Temperature Distribution after 2.45 GHz Long-Term Microwave Treatment

Accurate Modeling of the Microwave Treatment of Works of Art

Accurate Characterization of Reverberation Chamber Resonant Modes From Scattering Parameters Measurement

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