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Literatura académica sobre el tema "Resistance moisture meter"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 15 de febrero de 2022

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Artículos de revistas sobre el tema "Resistance moisture meter"

R. K. Byler. "RESISTANCE-TYPE PORTABLE COTTON LINT MOISTURE METER". Applied Engineering in Agriculture 22, n.º 1 (2006): 13–17. http://dx.doi.org/10.13031/2013.20182.

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R. K. Byler y W. S. Anthony. "APPLICATION OF A RESISTANCE MOISTURE METER TO HVI STRENGTH MEASUREMENTS". Transactions of the ASAE 41, n.º 6 (1998): 1577–82. http://dx.doi.org/10.13031/2013.17325.

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Wang, Wang Ping. "Design and Development of a Resistive Grain Moisture Meter". Applied Mechanics and Materials 716-717 (diciembre de 2014): 961–64. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.961.

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Moisture measurement of grain is an important aspect of its quality indicators. In this paper, a resistive grain moisture meter device was developed and the measuring principle and adopted scheme were illustrated. The structures and work principles of the resistance-to-frequency switching circuit and the temperature compensation circuit were introduced in detail. Finally, this paper gives a brief introduction to the mechanical grain sample. The resistive grain moisture meter has the advantages of fast testing speed, high precision and low cost, it’s one of the important tools in measuring grain moisture.

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Fernández-Golfín, Juan I., Maria Conde Garcia y Marta Conde Garcia. "Improving the accuracy of wood moisture content estimation in four European softwoods from Spain". Forest Systems 30, n.º 1 (25 de febrero de 2021): e002. http://dx.doi.org/10.5424//fs/2021301-17798.

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Aim of study: To obtain improved models to predict, with an error of less than ± 2.0%, the gravimetric moisture content in four different softwoods commonly present in the Spanish and European markets, based on electrical resistance measurements. This improved moisture content estimation is useful not only for assessing the quality of wood products, especially in the case of laminated products, during the transformation and delivery process, but also for accurately monitoring the evolution of moisture in wood present in bridges and buildings, which is of great importance for its maintenance and service life improvement.Area of study: The study was carried out on samples of Scots, laricio, radiata and maritime pines of Spanish provenances.Material and methods: On 50x50x20 mm3 solid wood samples (36 per species, 9 per condition), conditioned at 20ºC (±05ºC) and 40±5%, 65±5%, 80±5% or 90±5% Relative Humidity (RH), electrical resistance and oven-dry moisture content was measured. The Samuelsson's model was fitted to data to explain the relationship between the two variables. The accuracy of the model was evaluated by the use of an external sample.Main results: With the proposed mathematical functions the wood moisture content can be estimated with an error of ±0.9% in the four species, confirming the effectiveness of this nondestructive methodology for accurate estimation and monitoring of moisture content.Research highlights: our results allow the improvement of the moisture content estimation technique by resistance-type methodologies.Keywords: Resistance-type moisture meter; species correction.Abbreviations used: MC: Moisture content; RH: relative Humidity; R: electrical resistance; RP: wood electrical resistance measured parallel to the grain; RT: electrical resistance measured perpendicular (transversally) to the grain; GM-MC: gravimetrically measured moisture content.

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Conde Garcia, Maria, Marta Conde Garcia y Juan I. Fernández-Golfín. "Improving the accuracy of wood moisture content estimation in four European softwoods from Spain". Forest Systems 30, n.º 1 (28 de abril de 2021): 002. http://dx.doi.org/10.5424/fs/2021301-17798.

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Tamme, Valdek, Peeter Muiste y Hannes Tamme. "Experimental study of resistance type wood moisture sensors for monitoring wood drying process above fibre saturation point/ Takistus-tüüpi puidu niiskuse andurite eksperimentaalne uurimine puidu kuivatamise monitooringul niiskussisaldustel üle kiu küllastuspunkti". Forestry Studies 59, n.º 1 (1 de diciembre de 2013): 28–44. http://dx.doi.org/10.2478/fsmu-2013-0009.

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Abstract In wood moisture contents above fibre saturation point (FSP) the measuring accuracy of resistance type sensors starts decreasing and several side effects related to measuring wood moisture begin to occur. These side effects can be taken into account in the measuring process and can be eliminated. This research examined wood charging and discharging in the process of measurements, phenomena related to repeated measurements in both a single electrode insertion spot and different insertion spots in the specimen made of pine (Pinus sylvestris L.) sapwood and black alder (Alnus glutinosa (L.) Gaertn.). The research presented approaching equations separately for the voltage and current of the polarization and depolarization process for the initial phase of the process. Empirical equations were found for wood electrical resistance and electrical capacitance in the polarization process. For black alder possibilities for calibration of a resistance meter and resistance type electrodes were explored. It was found that to improve the calibration accuracy of resistance type measuring electrodes an additional individual calibration with regard to the average moisture content of the specimen may be carried out with the electrodes above FSP. Research results can be implemented in monitoring the wood drying process using resistance type wood moisture sensors, but also in determining the electrical parameters of growing trees.

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Suranata, I. Wayan Aditya y I Gede Humaswara Prathama. "Arsitektur Moisture Meter dengan Capacitive Sensing dan Serverless IoT Untuk Hidroponik Fertigasi". Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) 5, n.º 2 (28 de abril de 2021): 292–300. http://dx.doi.org/10.29207/resti.v5i2.2993.

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The current agricultural systems generally uses chemical fertilizers as a growth booster in order to meet the global food needs of 7 billion people and all of their livestock. But unfortunately not all are aware of the great danger behind such an overuse, unmetered application of chemical fertilizers, freely in an open field for the survival of the planet and its population. Thanks to technological advances, especially in the field of instrumentation and communication technology, the problem of increasing efficiency and avoiding such overuse should be minimized properly. In this study, the researchers tried to apply capacitive moisture sensor technology and serverless Internet of Things to the moisture meter instrument in the hydroponic drip fertigation system with roasted husk planting media. Capactive sensor technology has the advantage of corrosion resistance when applied to planting media containing high humidity and low alkalinity. By using a serverless IoT architecture, it is possible to monitor from anywhere via the internet, without involving complicated and expensive infrastructure. Based on the results of the prototype testing, it is known that the instruments built can work properly. The results of monitoring system conditions such as temperature and free heap appear stable. The reading results of the two sensors also run steadily, without fluctuations and variations in the reading that exceed 5%. The process of remote monitoring and data logging to serverless IoT is monitored to be stable with a data recording success rate of 99.8%.

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Hao, Yumei, Yuantao Hua, Xu Li, Xianqiang Gao y Jilong Chen. "Electrical Properties Predict Wheat Leaf Moisture". Transactions of the ASABE 64, n.º 3 (2021): 929–36. http://dx.doi.org/10.13031/trans.14210.

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HighlightsA non-destructive prediction model for moisture content of wheat leaves was established based on electrical properties.The model based on a single property (capacitance or resistance) was improved by using both properties.The model accurately detected the moisture content of wheat leaves in real-time to avoid irrigation lag.The results provide a basis for real-time and targeted water-saving irrigation of winter wheat in an arid region.Abstract. In this study, we aimed to establish a non-destructive and rapid approach to monitor the moisture content of wheat leaves in Southern Xinjiang, China, and promptly acquire information on the physiological water demand of crops to guide precision irrigation. Wheat leaves were used as the research object. Using a custom-made clamped parallel-plate capacitor and LCR digital bridge meter, we determined the electrical properties (capacitance and resistance) of wheat leaves with various moisture contents within a frequency range from 0.12 to 100 kHz. Moreover, we explored the correlation between leaf moisture content and the electrical properties. Our data showed that leaf moisture exhibited the best correlation with the electrical properties at 50 kHz. Under these optimized conditions, a model for moisture measurement was established using a single-parameter method (capacitance or resistance). However, the estimated standard errors (RMSE) of this method were 3.29% (for resistance) and 3.49% (for capacitance), which were greater than the standard error of the measured moisture content (2%). Therefore, we developed an improved model using a two-parameter method (capacitance and resistance), and the estimated standard error was 2.68%, which was more feasible for predicting moisture content compared with the single-parameter method. The model was validated using eight groups of wheat leaf samples at the turning-green stage and the jointing stage, and the RMSE values were less than 2%. Our findings provide a scientific basis for real-time and targeted water-saving irrigation of wheat in arid areas of Southern Xinjiang. Keywords: Electrical property, Model, Moisture content, Precision irrigation, Wheat leaves.

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Yang, Liu, Jian Zhong Yang y Long Li. "Moisture Permeability Test and Analysis of the Fire Taking Cotton Multilayer Fabric System". Advanced Materials Research 1048 (octubre de 2014): 41–45. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.41.

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This article about the moisture permeability test system of fire taking five outer fabric and five kinds of multi-layer fabric. Screening of fire suit multi-layer fabrics system, the water vapor permeability and fabric structure parameters of correlation analysis. The experimental results showed that, 3 # multi-layer fabric system is the best choice of the fire fighting service; Fabric thickness and i the square meter gram weight is inversely proportional to the fabric moisture permeability relationship; For the effect of PTFE membrane laminated fabric to fabric itself can also through the amount of water vapor has certain influence. While ensuring waterproof, Moisture permeability fabric may be appropriate to increase the resistance, in order to protect the user's comfort.

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Kawaai, Keiyu y Isao Ujike. "Electrical Resistance Tomography for Assessing Water Movement in Cracked Cementitious Mixtures". MATEC Web of Conferences 199 (2018): 11016. http://dx.doi.org/10.1051/matecconf/201819911016.

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Electrical resistance tomography (ERT) has been studied for visualizing variations of conductivity in concrete specimens. In recent years, unsaturated water flow through pores formed in concrete has been intensively examined though ERT systems to visualize the permeation front that gradually changes with elapsed time. This study examines water movement through internal cracks which are typically not observed on the surface of mortar or concrete specimens via ERT systems. The results indicate the gradual increase of saturated region owing to the ingress of water through cracked surface up to 120 hours. And, the region with higher conductivity estimated in uncracked parts is evidently in good agreement with higher moisture content measured by moisture meter on the split surface. In addition, the presence of crack in concrete specimen subjected to water ingress is clearly visualized via ERT images owing to rapid water movement in cracked zones. This study has provided the important insight that the ingress and the movement of water through pores and cracks formed in cementitious mixtures could be assessed via electrical measurements.

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Tesis sobre el tema "Resistance moisture meter"

Kolláriková, Simona. "Stavební průzkum a hodnocení stavu konstrukce". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2021. http://www.nusl.cz/ntk/nusl-433463.

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The diploma thesis deals with building survey of the New synagogue in Velké Meziříčí. It is focused on diagnostics of timber structures using non-destructive and semi-destructive testing methods, such as visual inspection, moisture content measurement, penetration depth of a steel pin measurement and endoscopy. The aim of the thesis is to evaluate the condition of the timber structures according to the results of the building survey.

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Libros sobre el tema "Resistance moisture meter"

Simpson, William Turner. Resistance moisture meter correction factors for four tropical wood species. Madison, Wis: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1994.

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Simpson, William Turner. Resistance moisture meter correction factors for four tropical wood species. Madison, Wis: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1994.

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Simpson, William Turner. Resistance moisture meter correction factors for four tropical wood species. Madison, WI: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1994.

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Capítulos de libros sobre el tema "Resistance moisture meter"

Keefer, Robert F. "Effective Water Use—Irrigation". En Handbook of Soils for Landscape Architects. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195121025.003.0010.

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Soils that are suitable for irrigation are deep soils that are permeable and have a high available water-holding capacity (usually containing much organic matter). Limitations for irrigation include presence of restrictive layers (pans), erodible soils, sloping land, susceptibility to stream overflow, salinity or alkalinity, stoniness, and hazard of soil blowing. The amount of plant-available water in a soil depends on rooting depth and soil texture. Coarse textured sands hold much less available water than finer textured clayey soils. Available water increases as the texture becomes finer up to a silt loam. Any soil texture finer than that results in no additional increase in available water. In shallow soils, the rooting depth is limited by the soil depth. In deep soils, root depth is determined by the kind of plants present: . . . Trees and large shrubs 48 inches depth Medium shrubs and vines 40 inches depth Small shrubs and ground cover 24 inches depth . . . A number of techniques can be used to determine when water should be applied to soil in which plants are growing. These techniques include observing the plants, especially for wilting; feeling the soil; using tensiometers or electrical resistance meters installed in the soil; and measuring temperatures of plant leaves. Wilting—When plants begin to lose water they droop and wilting results. If plants remain in this condition very long, they soon die. It is better to water plants before they become wilted. Any plant that is wilted will require some time to reestablish its water equilibrium, thereby slowing the growth of that plant. The amount of moisture in a soil can be roughly estimated by the “feel method”. The degree of moisture can be determined by rolling or squeezing the soil into a ball. The soil moisture condition can be divided into six categories from dry to very wet: . . . a. If a ball will not form → soil is too dry for plants. b. If the ball formed will not crumble when rubbed → soil is too wet for plants. . . .

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Actas de conferencias sobre el tema "Resistance moisture meter"

Woodward, Neil, Kjell Edvard Apeland, Jan Olav Berge, Richard Verley y Mike Armstrong. "Subsea Pipelines: The Remotely Welded Retrofit Tee for Hot Tap Applications". En ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10765.

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Over the last 10 years Statoil has developed subsea remote hot tap technology. The first use of the remote hot tap technology was the Tampen Link hot tap in 2008. The hot tap cutting operation itself was performed without the use of divers; however, the preparatory works including hyperbaric welding of the hot tap tee was performed with saturation divers. The world’s deepest hot tap operations on a pressurized pipeline were performed on the Ormen Lange field in the Norwegian Sea in August 2009. Two Hot Taps were conducted in a water depth of 860 meters on pre-installed tees. The development of the Pipeline Repair System Remote Hot Tap equipment is the result of targeted research and development effort and extensive qualification work over many years. The Retrofit Tee remote installation, welding and cutting equipment has now been employed as part of a production installation: the Åsgard Subsea Compression project to extend the Åsgard gas-field lifetime. This paper describes the dry hyperbaric GMA weld procedure development and qualification performed in the laboratory, using the Corrosion Resistant Alloy consumable filler material Alloy 59, for the Remote Hot Tapping application using the Retrofit Tee. Specific attention was paid to areas of concern prior to performing the formal Weld Procedure Qualification work, particularly with regard to the effects of moisture and temperature upon the resultant weld quality. Weld procedures developed in the laboratory were successfully tested subsea in representative environments using the Remote Tee Welding Tool (RTWT) equipment in the Sognefjord, Norway, with offshore tests performed at 265 and 350msw in 2011. Further tests were performed in 2012 at 265msw and in the Retrofit Tee itself at 316msw in the Nedstrandfjord. The hyperbaric GMA weld procedures have now been applied for the production application for the Åsgard Subsea Compression project, with the installation of a Retrofit Tee, associated valve module and gooseneck spool to enable a cost-effective modification to the existing pipeline network without interfering with ongoing production. The Retrofit Tee will be connected with a Subsea Compressor station to extend the gas-field lifetime. This milestone represents the world’s first application of diverless dry hyperbaric GMA welding for a subsea production application.

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