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Добірка наукової літератури з теми "Metcer"

Автор: Grafiati

Опубліковано: 10 вересня 2022

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Статті в журналах з теми "Metcer"

Saranga, Herbhi Tumba, As'ari ., and Seni H. J. Tongkukut. "Deteksi Air Tanah Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner-Schlumberger di Masjid Kampus Universitas Sam Ratulangi dan Sekitarnya." Jurnal MIPA 5, no. 2 (August 2, 2016): 70. http://dx.doi.org/10.35799/jm.5.2.2016.12963.

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Telah dilakukan penelitian untuk membuat peta akuifer air tanah di Masjid Kampus Unsrat dan sekitarnya. Penelitian untuk mendapatkan nilai resistivitas lapisan tanah dilakukan dengan menggunakan metode geolistrik konfigurasi Wenner-Schlumberger dengan jumlah lintasan pengukuran sebanyak 5 lintasan. Jumlah data setiap lintasan pengukuran sebanyak 576 data, dan diolah menggunakan software RES2DINV. Hasil berupa gambar tampang lintang resistivitas 2D yang digunakan untuk menentukan posisi akuifer air tanah. Hasil menunjukkan bahwa adanya lapisan dengan nilai resistivitas rendah yaitu 0,12 Ωm-0,64 Ωm. Posisi lapisan dengan nilai resistivitas rendah merupakan lapisan pembawa air dan terdapat di sebelah Selatan, Barat dan Utara Masjid Kampus. Lintasan 1 ada pada meter ke 170-180 dengan kedalaman 5 hingga 30 meter. Lintasan 3 keberadaan air tanah terdapat di meter ke 150-155 dengan kedalam 2 meter-17 meter. Lintasan 4 keberadaan air tanah ada pada meter ke 38-48 dengan kedalaman 8 meter-20 meter. Lintasan 5 keberadaan air tanah ada pada meter ke 50-60 dengan kedalaman 2 meter-10 meter.Research had been done to create a map of groundwater aquifers in Unsrat Campus Mosque and its surroundings. Research to obtain a layer of soil resistivity values were measured using the Wenner-Schlumberger geoelectric configuration with the number of measurement tracks as much as 5 tracks. The amount of data of each track is as many as 576 measurement data, and processed using software RES2DINV. Results are cross-sectional images of 2D resistivity were used to determine the position of groundwater aquifers. The results indicate that the presence of a layer with low resistivity values are 0.12 Ωm-0.64 Ωm. The position of the layer with low resistivity values is water bearing layers and are in the South, West and North Campus Mosque. Tracks 1 exists at 170-180 meters to a depth of 5 to 30 meters. Tracks 3 where the ground water contained in the 150-155 meters to 2 meters into 17 meters. Tracks 4 where groundwater is on 38-48 meters to a depth of 8 meters-20 meters. Tracks 5 where ground water is on 50-60 meters to a depth of 2 meters-10 meters.

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Ethem Karadirek, I. "An experimental analysis on accuracy of customer water meters under various flow rates and water pressures." Journal of Water Supply: Research and Technology-Aqua 69, no. 1 (November 19, 2019): 18–27. http://dx.doi.org/10.2166/aqua.2019.031.

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Abstract Apparent losses are mainly due to metering errors in well-managed water supply systems. There are many types of water meters based on mechanisms to measure flow passing through. Therefore, selection of water meter type is important as meter type effects measurement accuracy. In this study, a total of 50 domestic water meters were tested under varying flow rates and different water pressures. Water consumptions of end-users show temporal changes depending on the life style of consumers. Flow rates passing through the water meter and water consumption profiles affect water meter accuracy. Water consumption of a couple of end-users was monitored and consumption patterns were extracted and obtained water consumption patterns were used to determine water meter errors. The collection method was applied for determination of water meter errors. Starting flow rates, error curves and weighted error of water meters were measured in a laboratory setup. Tested volumetric-type water meters have the lowest starting flow rate and the highest accuracy whereas single-jet water meters have the lowest accuracy and the highest starting flow rate. This study aimed to provide insights on the accuracy of water meters under varying flow rates and water pressures, and advantageous information for water meter-type selection.

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Monje, Oscar A., and Bruce Bugbee. "Inherent Limitations of Nondestructive Chlorophyll Meters: A Comparison of Two Types of Meters." HortScience 27, no. 1 (January 1992): 69–71. http://dx.doi.org/10.21273/hortsci.27.1.69.

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Two types of nondestructive chlorophyll meters were compared with a standard, destructive chlorophyll measurement technique. The nondestructive chlorophyll meters were 1) a custom built, single-wavelength meter, and 2) the recently introduced, dual-wavelength, chlorophyll meter from Minolta (model SPAD-502). Data from both meters were closely correlated with destructive measurements of chlorophyll (r2 = 0.90 and 0.93; respectively) for leaves with chlorophyll concentrations ranging from 100 to 600 mg·m-2, but both meters consistently overestimated chlorophyll outside this range. Although the dual-wavelength meter was slightly more accurate than the single-wavelength meter (higher r2), the light-scattering properties of leaf cells and the nonhomogeneous distribution of chlorophyll in leaves appear to limit the ability of all meters to estimate in vivo chlorophyll concentration.

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Petrýdes, Patrik, David Hůlek, and Martin Novák. "Usage of Bonding Meters in Aviation." MAD - Magazine of Aviation Development 5, no. 4 (November 9, 2017): 20. http://dx.doi.org/10.14311/mad.2017.04.03.

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This paper is about bonding meters, their principles, specifications and usage of bonding meters in aviation. The bonding meter is essentially a milliohm meter. It is used for measuring small values of resistance. The word “bonding” means that conductive parts of aircraft are bonded together by a conductive connection. The bonding meter tests, if the conductive connections are really conductive. This paper is, in its essence, a study how to use bonding meter and its usage. The usage is focused on the aviation. The first part of the paper describes bonding meter´s purpose and its specifications. There are several types of the bonding meters and every type has different specifications. The next part describes bonding meter´s usage, its application and measuring principles. The bonding meters can be used by different ways so it is good to explain the most used principles. The last part of this paper summarizes all mentioned knowledge and shows authors opinion to a development of the bonding measurements.

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Ompi, Billy N., Unstain N. W. J. Rembet, and Ari B. Rondonuwu. "Coral Reef Conditions of Hogow and Dakokayu Islands Southeast Minahasa Regency." JURNAL ILMIAH PLATAX 7, no. 1 (January 30, 2019): 186. http://dx.doi.org/10.35800/jip.7.1.2019.22743.

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This research objective was to determine the condition of Coral Reef ecosystems in Dakokayu and Hogow Islands, Southeast Minahasa Regency. The method that has been used in this studies that is Line Intercept Transect (LIT) by diving activities at 5 meter and 10 meters depth with 50 meters transect length. Each biota passed by the line transect recorded according based on shape of growth.Coral Reefs conditon in Hogow Island in 5 meters and 10 meters depth were categorized as a “Good” where the percentage of live coral cover in 5 meters depth is 70.12% and in 10 meters depth is 55.78%. The condition of Coral Reefs on Dokokayu Island at a depth of 5 meters is categorized “Good” with the percentage of live coral cover is 56.32% while in the 10 meters depth it is categorized as “Medium” with the percentage of live coral cover is 48.10%. Water quality parameters such as temperature, salinity, brightness, pH, and dissolved oxygen (DO) are within the range of tolerance for Coral Reefs to survive.Keywords: Condition, Coral Reef, Hogow, DokokayuABSTRAKTujuan penelitian untuk mengetahui kondisi ekosistem terumbu karang di Pulau Dakokayu dan Pulau Hogow, Kabupaten Minahasa Tenggara. Metode yang telah digunakan dalam penelitian ini yaitu Line Intercept Transek (LIT) dengan melakukan penyelaman pada kedalaman 5 dan 10 meter dengan panjang transek 50 meter. Setiap biota yang dilewati transek akan dicatat menurut bentuk pertumbuhannya. Secara umum, kondisi terumbu karang di Pulau Hogow pada kedalaman 5 meter dan 10 meter, dikategorikan Baik dimana persentasi tutupan karang hidup pada kedalaman 5 meter sebesar 70,12% dan pada kedalaman 10 meter sebesar 55,78%. Kondisi terumbu karang di Pulau Dokokayu pada kedalaman 5 meter dikategorikan Baik dengan persentase tutupan karang hidup 56,32% sedangkan di kedalaman 10 meter dikategorikan Sedang dengan persentase tutupan karang hidup 48,10 %. Parameter kualitas perairan seperti suhu, salinitas, kecerahan, pH, dan oksigen terlarut (DO) berada dalam kisaran toleransi bagi terumbu karang untuk dapat bertahan hidup.Kata Kunci : Kondisi, Terumbu Karang, Hogow, Dokokayu

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Kojong, Marcella, Gerald H. Tamuntuan, and Ferdy _. "Pemanfaatan Metode Geolistrik Konfigurasi Dipole-Dipole untuk Investigasi Sumber Air Panas di Kelurahan Paniki Bawah Minahasa Utara." Jurnal MIPA 6, no. 2 (October 28, 2017): 77. http://dx.doi.org/10.35799/jm.6.2.2017.17798.

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Telah dilakukan penelitian dengan mengukur nilai resistivitas pada lapisan tanah di Paniki Bawah melalui lintasan yang sudah ditentukan yaitu sebanyak 5 lintasan. Metode yang digunakan dalam penelitian ini adalah metode konfigurasi Dipole-Dipole dengan spasi antar elektroda bervariasi , lintasan 1 jarak antar elektorda 10 meter dengan panjang lintasan 480 meter, lintasan 2 dan 3 jarak antar elektroda 5 meter dengan panjang lintasan 240 meter, lintasan 5 dengan jarak 10 meter dengan panjang lintasan 240 meter dan lintasan terakhir jara antar elektroda adalah 5 meter dengan panjang lintasan 120 meter. Hasil penelitian menunjukkan bahwa tiap-tiap lintasan adanya zona-zona lemah dengan nilai resistivitas <10 Ωm yang diidentifikasikan sebagai lapisan air panas dan nilai resistivitas >100 Ωm diindikasikan sebagai batuan penghantar panas.Research has been carried out by measuring the resistivity values it the soil layers in the lower Paniki through path already specified as much as 5 trajectory. The methods used in this research is a method of Dipole-Dipole configuration an the configuration of the Pole-Pole with a space between electrodes varies, lap 1 the distance between the electrodes of 10 meters with a long trajectory of 480 metres, the distance between the 2 and 3 electrode 5 meters by track length 240 meters, the 4 track length 240 meters and spacing between electrodes of 10 meters last lap while the distance between the electrode is 5 meter with a long trajectory of 120 meters. The results showed that each path shows the existence of zones of weak value of resistivity <10 Ωm who identify as layers in hot water and resistivity values >100 Ωm rock the hot conductor indicated as.

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Rungkat, Valdino M. E., Jan FWS Tamanampo, and Jhon L. Tombokan. "Community Structure of Pomacentridae fish in Coastal Waters on Malalayang Dua Village of Manado Gulf." JURNAL ILMIAH PLATAX 1, no. 3 (August 22, 2013): 125. http://dx.doi.org/10.35800/jip.1.3.2013.2570.

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ABSTRACT This study was conducted to determine the species composition and commu-nity structure of Pomacentridae (relative density, diversity, dominance and even-ness of species). This research was conducted in waters of the Manado Bay, at Kelurahan Malalayang Dua shore, on August 14th, 2012. The studies was conduc-ted on 2 sites, one has 3 meters depth (01o27'40.5" NL 124o47'32.5" EL) and ano-ther at 10 meters depth (01o27'43.6" NL 124o47'27.8" EL). The results and analysis of data, the total number of species found at a depth of 2 points is 15 species, in which was found at a depth of 3 meters at a depth of 10 species and 15 species discovered 10 meters. The species most commonly found is Pomacentrus brachial and Dascyllus reticulatus. The highest relative density values at a depth of 3 meters is Dascyllus reticulatus (22%) and at depth10 meters is Pomacentrus brachialis (18%). Diversity index at 3 meters depth is 1.941 while at 10 meters is 2.326. The result showed that diversity of Pomacentridae is low at 3 meters depth and average at 10 meters depth which means moderate community hability. At both depths, there was no species dominance and the avenness was stable. Keywords : Community Structure, Pomacentridae, Manado Gulf ABSTRAK Penelitian ini dilakukan untuk mengetahui komposisi spesies dan struktur komunitas ikan Pomacentridae (kepadatan relatif, keanekaragaman, dominasi dan kemerataan spesies). Lokasi penelitian di Teluk Manado, tepatnya di perairan depan Kelurahan Malalayang Dua. Penelitian dilakukan pada 2 titik kedalaman yaitu kedalaman 3 meter (01o27’40.5” LU 124 o47’32.5” BT) dan kedalaman 10 meter pada koordinat (01o27’43.6” LU 124 o47’27.8” BT). Metode yang digunakan adalah metode sensus visual, dengan penentuan jalur mengunakan penanda me-teran sepanjang 50 meter yang diletakkan di daerah terumbu karang yang sejajar garis pantai. Hasil penelitian dan analisis data, jumlah total spesies yang ditemu-kan pada 2 titik kedalaman adalah 15 spesies, di mana pada kedalaman 3 meter ditemukan 10 spesies dan pada kedalaman 10 meter ditemukan 15 spesies. Spe-sies yang paling banyak ditemukan adalah Pomacentrus brachialis dan Dascyllus reticulatus. Nilai kepadatan relatif tertinggi pada kedalaman 3 meter ada-lah spe-sies Dascyllus reticulatus 22% dan pada kedalaman 10 meter adalah Pomacentrus brachialis 18%. Indeks keanekaragaman pada kedalaman 3 meter adalah 1,941 sedangkan pada kedalaman 10 meter dengan nilai 2,326. Hal ini menunjukkanbahwa keanekaragaman ikan Pomacentridae pada kedalaman 3 meter adalah rendah dan pada kedalaman 10 meter keanekaragamannya adalah sedang dengan kestabilan komunitas sedang. Pada ke dua kedalaman ini tidak ada spesies dominasi dan kemerataannya adalah stabil. Kata kunci : struktur komunitas, Pomacentridae, Teluk Manado 1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT

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Chapin, David A., Michael F. Crawford, and Max Baumeister. "A side‐by‐side test of four land gravity meters." GEOPHYSICS 64, no. 3 (May 1999): 765–75. http://dx.doi.org/10.1190/1.1444586.

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Four different land gravity meters were run side by side on a test range in eastern Texas. This test range was designed to duplicate typical field survey conditions encountered in gravity measurements on 3-D land seismic surveys. A profile of 270 stations was acquired with a station spacing of 33.5 m (110 ft). The four meters were Scintrex CG-3, Sodin, LaCoste & Romberg (L&R) G-meter, and Edcon/L&R Super-G meter. The purpose of this study was to determine which of the four meters had the best balance of accuracy, convenience, and speed of measurement for these specialized surveys. All four meters had their limitations, and no single meter was greatly superior to the others. The CG-3 was awkward in leveling, had a large (368 μGal per day) drift rate, and had some quirks in its user interface. The Sodin meter had problems controlling its temperature and, at one point, had a very high 935 μGal per day drift rate. It had the poorest accuracy of the four. The G-meter lacked a convenient digital user interface; thus, it was susceptible to operator blunder in misreading or recording the data. The Super-G meter also had some problems in its user interface, had only a 6-mGal range without a range change, and was the heaviest of the field instruments. An unbiased statistical estimator was developed to analyze the data. The technique determined the best three meters at each station. Both the G-meter and the Super-G meter produced the most accurate data. They had an average absolute deviation from the mean of 20 and 23 μGal, respectively. In comparison, the two quartz meters—the CG-3 and the Sodin—had an average absolute deviation from the mean of 31 and 46 μGal, respectively. We would like to see the manufacturers improve (or add, in the case of the G-meter and the Sodin) their digital interfaces. Additionally, we would like to see upgrades in the thermal control systems in all the meters. The single largest amount of station time was devoted to leveling (rather than reading) the meters. Significant advances can be envisioned to create fast, automated leveling systems in all the meters.

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Yates, Charles M., Timothy Justus, Nart Bedin Atalay, Nazike Mert, and Sandra E. Trehub. "Effects of musical training and culture on meter perception." Psychology of Music 45, no. 2 (July 20, 2016): 231–45. http://dx.doi.org/10.1177/0305735616657407.

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Western music is characterized primarily by simple meters, but a number of other musical cultures, including Turkish, have both simple and complex meters. In Experiment 1, Turkish and American adults with and without musical training were asked to detect metrical changes in Turkish music with simple and complex meter. Musicians performed significantly better than nonmusicians, and performance was significantly better on simple meter than on complex meter, but Turkish listeners performed no differently than American listeners. In Experiment 2, members of Turkish classical and folk music clubs who were tested on the same materials exhibited comparable sensitivity to simple and complex meters, unlike the American and Turkish listeners in Experiment 1. Together, the findings reveal important effects of musical training and culture on meter perception: trained musicians are generally more sensitive than nonmusicians, regardless of metrical complexity, but sensitivity to complex meter requires sufficient exposure to musical genres featuring such meters.

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Li, Xue Jun, and Peter Han Joo Chong. "Design and Implementation of a Self-Powered Smart Water Meter." Sensors 19, no. 19 (September 26, 2019): 4177. http://dx.doi.org/10.3390/s19194177.

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Smart cities require interactive management of water supply networks and water meters play an important role in such a task. As compared to fully mechanical water meters, electromechanical water meters or fully electronic water meters can collect real-time information through automatic meter reading (AMR), which makes them more suitable for smart cities applications. In this paper, we first study the design principles of existing water meters, and then present our design and implementation of a self-powered smart water meter. The proposed water meter is based on a water turbine generator, which serves for two purposes: (i) to sense the water flow through adaptive signal processing performed on the generated voltage; and (ii) to produce electricity to charge batteries for the smart meter to function properly. In particular, we present the design considerations and implementation details. The wireless transceiver is integrated in the proposed water meter so that it can provide real-time water flow information. In addition, a mobile phone application is designed to provide a user with a convenient tool for water usage monitoring.

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Більше джерел

Дисертації з теми "Metcer"

Largiller, Grégory. "Maîtrise du frittage de matériaux céramique-métal à gradients de composition et de structure." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0160.

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Les matériaux à gradient de composition et de structure permettent d'associer des propriétés complémentaires dans une pièce donnée. Les cermets (matériaux composite céramique métal) développés par Rio Tinto Alcan seront potentiellement utilisés en tant qu'anodes inertes pour l'électrolyse de l'aluminium. Pour connecter cette pièce à matrice céramique au réseau électrique, ce matériau doit être associé avec un matériau conducteur électrique en une seule opération de frittage. En associant les connaissances issues de la métallurgie des poudres avec une analyse microstructurale, des calculs thermodynamiques et des considérations mécaniques, une gamme de matériaux appelés metcer (composite métal céramique) a été développée. Selon la proportion et composition de la phase métallique initiale de ces metcers, ils peuvent être cofrittés en une seule opération avec un cermet. Nous avons montré que la proportion de phase métallique influençait fortement la tenue mécanique de l'ensemble pendant le frittage ; que la composition des phases oxydes et métalliques permettait de maîtriser les phénomènes de diffusion entre les parties cofrittées pour construire une interface graduelle. Des lois phénoménologiques basées sur la mécanique des milieux continus ont été développées pour modéliser le frittage d'un cermet et d'un metcer. Ces lois ont été introduites dans un logiciel de calcul par éléments finis pour simuler le frittage d'assemblages bicouches et identifier les éventuels points de fragilité de différentes géométries. En comparant ces résultats de simulation numérique à des observations optiques in situ sur des pièces centimétriques, nous avons montré que l'amorçage de fissures proche de l'interface a lieu lorsque les contraintes sont élevées. A basse température, de faibles écarts de déformations entre les couches suffisent à amorcer des fissures lorsque les viscosités des matériaux sont grandes et qu'ils ont un comportement fragile. A haute température, lorsque les écarts de déformation sont grands et les viscosités faibles, les contraintes entre les couches sont relaxées. En utilisant les connaissances acquises à la fois sur la chimie et la mécanique du système, une pièce centimétrique tricouche à gradient exempt de fissure a été réalisée
Graded materials are used to gather complementary physical and/or chemical properties into a single part. Cermet material (ceramic metal composite) developed by Rio Tinto Alcan may be used as inert anode for aluminium electrolysis. To connect these ceramic matrix materials to the current network, we propose to associate them with a conductive material in a single sintering step. Using our knowledge on powder metallurgy with microstructure analysis, thermodynamical and mechanical calculations, a new range of material called metcer (metal ceramic composite) has been developed. According to their metal phase proportion and composition, the metcer materials can be cosintered with cermets in a single sintering step. By modifying the metal phase proportion, we enabled the parts to keep joined during the whole sintering thermal cycle. The composition of oxides and metal phases change the diffusion phenomena and enable one to build a graded interface between the layers. Based on continuum mechanics, constitutive equations have been used to simulate the sintering of a cermet and a metcer. Constitutive equations have been implemented into a finite element software to identify the weak regions of bilayers parts of complex geometry. We compared numerical simulation results with optical observations made during sintering on large scale bilayers. Cracks near the interface occur at low temperature when the strain mismatch between the layers is low and the viscosities of the layers are high. Thus, the materials have a fragile behaviour. At high temperature, when the viscosities are low and the strain mismatch is high, the stresses in the vicinity of the interface are released. Combining our knowledge on the chemistry and interactions between these materials, we developed a trilayer material. This material showed up a graded interface without any crack

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Justensen, Jared C. "The Effects of Meter Orientation Downstream of a Short Radius Elbow on Electromagnetic Flow Meters." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/4875.

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Electromagnetic flowmeters (known as magnetic flow meters) are a widely used type of flowmeter. The accuracy of magnetic flow meters are a function of several factors, not the least of which is the flow condition inside the pipe. It has been shown that disturbances in the velocity profile affects the accuracy of a magnetic flow meter (Luntta, 1998). Accordingly, manufacturers of magnetic flow meters give installation guidelines. These guidelines help prevent the user from installing the meter in a pipe configuration that is likely to cause the meter to produce inaccurate results. Although most manufacturers provide recommendations about the amount of straight pipe that is necessary upstream of the meter, little is said about the orientation of the meter in relation to upstream disturbances. This study examines the performance of magnetic flow meters when positioned at two different orientations: EIP (electrodes in plane with an upstream 90-degree short radius elbow) and EOP (electrodes out of plane). Four different meters were included in the study in which a baseline straight pipe test was first performed using over fifty diameters of straight pipe upstream of each meter. The straight pipe test was used to determine the baseline accuracy of each of the meters over a velocity range that is typical for the size and function of the meters. Meters were then installed at five different locations downstream from a 90-degree short-radius elbow. At each location the meters were tested in two orientations at five different flow rates. The intent of the research is to show that the orientation of a magnetic flow meter affects the meter’s ability to produce accurate flow readings when it is installed downstream of a flow disturbance. The results from this research showed a significant shift in measurement accuracy when the meter was in EIP and EOP orientations. All of the meters in the study produced accuracy readings at one point of another that were outside the specified accuracy from the meter manufacturer. Interestingly, the meters that had a larger manufacturer specified accuracy produced smaller shifts in accuracy when comparing the test results under EIP and EOP conditions. The results of the research are given in the section entitled “Results and Discussion” as well as in the Appendix A.

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Temperley, Neil Colin Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Optimisation of an Ultrasonic Flow Meter Based on Experimental and Numerical Investigation of Flow and Ultrasound Propagation." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2002. http://handle.unsw.edu.au/1959.4/22044.

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This thesis presents a procedure to optimise the shape of a coaxial transducer ultrasonic flow meter. The technique uses separate numerical simulations of the fluid flow and the ultrasound propagation within a meter duct. A new flow meter geometry has been developed, having a significantly improved (smooth and monotonic) calibration curve. In this work the complex fluid flow field and its influence on the propagation of ultrasound in a cylindrical flow meter duct is investigated. A geometric acoustics (ray tracing) propagation model is applied to a flow field calculated by a commercial Computational Fluid Dynamics (CFD) package. The simulation results are compared to measured calibration curves for a variety of meter geometries having varying lengths and duct diameters. The modelling shows reasonable agreement to the calibration characteristics for several meter geometries over a Reynolds number range of 100...100000 (based on bulk velocity and meter duct diameter). Various CFD simulations are validated against flow visualisation measurements, Laser Doppler Velocimetry measurements or published results. The thesis includes software to calculate the acoustic ray propagation and also to calculate the optimal shape for the annular gap around the transducer housings in order to achieve desired flow acceleration. A dimensionless number is proposed to characterise the mean deflection of an acoustic beam due to interaction with a fluid flow profile (or acoustic velocity gradient). For flow in a cylindrical duct, the 'acoustic beam deflection number' is defined as M g* (L/D)^2, where: M is the Mach Number of the bulk velocity; g* is the average non-dimensionalised velocity gradient insonified by the acoustic beam (g* is a function of transducer diameter - typically g* = 0.5...4.5); L is the transducer separation; and D is the duct diameter. Large values of this number indicate considerable beam deflection that may lead to undesirable wall reflections and diffraction effects. For a single path coaxial transducer ultrasonic flow meter, there are practical limits to the length of a flow meter and to the maximum size of a transducer for a given duct diameter. The 'acoustic beam deflection number' characterises the effect of these parameters.

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Řezáč, Martin. "Uroflow meter." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217182.

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The aim of this thesis is to design and describe a device for medical measurement of flow of urine.This work is divided in several parts. In the first part the problem is analysed and the first version of the devices is designed. In second part the final solution and build of the prototype is described. In the next part the manufacture and testing of the first series is outlined.

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Vedapuri, Damodaran. "Design of a clamp-on ultrasonic flow meter for wet gas pipelines." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1178910814.

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Metayer, Myriam Vernois Solange Pigozzi Marinella. "La construction de l'histoire de l'art du XXè siècle analyse et étude comparative d'ouvrages français et italiens publiés entre 1945 et 1977 /." [Poitiers] : [I-médias], 2009. http://theses.edel.univ-poitiers.fr/theses/2009/Metayer-Myriam/2009-Metayer-Myriam-These.pdf.

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Reproduction de : Thèse doctorat : Histoire de l'Art : Poitiers : 2009. Reproduction de : Thèse doctorat : Histoire de l'Art : Universita di Bologna : 2009.
Thèse soutenue en co-tutelle. Titre provenant de l'écran titre. Bibliogr. p. 509-539. Notes bibliogr. Index.

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Chang, Shuai, Andy Gee, Benjamin Ramos, Kyle Province, Dan Harcourt, and Matthew Hendrick. "Smart Grid Impedance Meter." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/297527.

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Texas Instruments has been developing Power Line Communication (PLC) technology to provide a form of communication for worldwide applications. By utilizing power grids within an infrastructure, it is possible to transmit a signal through the existing power lines such as a network would. Transmission of data within the electrical grid proves to be inherently noisy, thus compromising any information that is sent over the network. In order to provide a reliable platform of communication, frequency and impedance variation needs to be analyzed in order to provide proper development into PLC solutions. Within the scope of this project an analytical tool was developed to provide engineers with a method to determine impedance and frequency variations. Analysis and testing has been conducted to ensure the device satisfies the design requirements.

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Xie, Kaicheng. "Automatic Utility Meter Reading." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1270587412.

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BROSSET, MARIE-CHRISTINE. "Parents-soignants : un metier difficile." Angers, 1991. http://www.theses.fr/1991ANGE1068.

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Lopes, Paulo Henrique de Oliveira. "Ponto de venda de energia eletrica com cartão indutivo pre-pago." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260080.

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Orientador: Jose Antonio Siqueira Dias
Acompanha 1 CD-R
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-08-14T09:20:05Z (GMT). No. of bitstreams: 1 Lopes_PauloHenriquedeOliveira_M.pdf: 1347912 bytes, checksum: 86c17d3e935cd0c95c11539e4590d844 (MD5) Previous issue date: 2009
Resumo: O aumento da poluição nos grandes centros urbanos tem levado a uma busca incessante de soluções tecnológicas para a substituição dos veículos com motor a combustão por outra fonte de energia, sendo que os veículos elétricos têm se apresentado como uma das alternativas mais promissoras para um futuro próximo. Entretanto, um dos problemas a resolver na utilização de veículos puramente elétricos é o abastecimento (recarga das baterias) nas ruas. Neste trabalho é apresentado o projeto, desenvolvimento e implementação de um protótipo de um ponto de fornecimento de energia elétrica pré-paga usando cartões indutivos. O protótipo desenvolvido operou dentro das especificações e normas aplicáveis ao setor de medida de energia elétrica. Outras aplicações para este equipamento estão sendo estudadas, como por exemplo na venda de energia elétrica para residências de baixa renda.
Abstract: The increasing in pollution caused by combustion engines in large cities has motivated the search for new technologies to replace these engines, and the electrical vehicle is a promissing alternative in the near future. However, one of the problems that remains to be solved is charging these vehicles in the streets. This works presents the design, development and implementation of a pre-paid point of sale of electrical energy equipment which uses inductive cards. The developed prototype meets the specifications and rules of the Brazilian electrical sector for the energy meters. Other applications for this pre-paid energy meter are being considered, as, for example, in selling pre-paid energy to low.
Mestrado
Eletrônica, Microeletrônica e Optoeletrônica
Mestre em Engenharia Elétrica

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Книги з теми "Metcer"

Moskovskai︠a︡ gosudarstvennai︠a︡ konservatorii︠a︡ im. P.I. Chaĭkovskogo and Moskovskiĭ gosudarstvennyĭ institut muzyki imeni A.G. Shnitke, eds. Nikolaĭ Metner. Moskva: Muzyka, 2013.

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Benoit, M. D. Meter made: A Jack Meter casefile. Garibaldi HIghlands, B.C: Zumaya Otherworlds, 2005.

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100 meter. [Spain]: Basque American Foundation, 1985.

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Benoit, M. D. Meter made. 2nd ed. Austin, TX: Zumaya Otherworlds, 2008.

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Meter parents: A Jack Meter case file. Austin, TX: Zumaya Otherworlds, 2011.

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Mourik, Mariska. Eén meter Everest. Amsterdam: Contact, 2000.

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Pool, James W. Rhyme and meter. New York: Vantage Press, 1987.

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Meter as rhythm. New York: Oxford University Press, 1997.

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Kempf, Jerry. Digital tally meter. San Dimas, CA: U.S. Dept. of Agriculture, Forest Service, Technology & Development Program, 1998.

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Aichele, Christian, and Oliver D. Doleski, eds. Smart Meter Rollout. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-8348-2440-0.

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Частини книг з теми "Metcer"

Gooch, Jan W. "Metier." In Encyclopedic Dictionary of Polymers, 460. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7445.

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Groves, Peter L. "Meter." In A Companion to Poetic Genre, 34–52. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781444344318.ch3.

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Gooch, Jan W. "Meter." In Encyclopedic Dictionary of Polymers, 454. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7369.

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Weik, Martin H. "meter." In Computer Science and Communications Dictionary, 1010. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_11451.

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Santa, Matthew. "Notated Meter and Sounding Meter." In Hearing Rhythm and Meter, 1–20. New York ; London : Routledge, 2019.: Routledge, 2019. http://dx.doi.org/10.4324/9781351204316-1.

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Gooch, Jan W. "Downdraft Metier." In Encyclopedic Dictionary of Polymers, 242. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3974.

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Gooch, Jan W. "Updraft Metier." In Encyclopedic Dictionary of Polymers, 784. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12381.

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Gooch, Jan W. "Metier Twist." In Encyclopedic Dictionary of Polymers, 460. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7446.

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Wen, Bor-Jiunn. "Illuminance Meter." In Encyclopedia of Color Science and Technology, 744–46. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4419-8071-7_357.

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Weik, Martin H. "service meter." In Computer Science and Communications Dictionary, 1558. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_17093.

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Тези доповідей конференцій з теми "Metcer"

Okungbowa, Norense, and Noorallah Rostamy. "Real Time Automatic Calibration of Flow Meters for Real-Time Hydraulic Modelling." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33609.

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Performance of flow meters is often a function of flow rate as well as properties (density and viscosity) of the fluid measured by the meters. Since comparison of flow meter readings is a key parameter in leak detection techniques, it is desirable that the readings from the flow meters are accurate and comparable. The idea behind real-time calibration of flow meters is to calibrate a flow meter (called the dependent flow meter) against another flow meter (called the independent flow meter) that is assumed to read correctly. The real-time calibration method is useful under two main conditions: i) when the reference flow meter has been calibrated to a high degree of accuracy and the flow readings from the meter are accurate; ii) when the pipeline operating conditions support the fact that the meter-in flow at one station equals the meter-out flow at the other station. By determining the deviation of the dependent flow meter reading from the independent flow meter reading, a time-averaged flow ratio is calculated. However, the flow ratio calculation and time averaging is only updated at prescribed conditions. The proper correction factor is ascertained and then applied to the dependent flow meter reading. The main advantage of using this technique is that the flow meter repeatability is reduced over time below the nominal accuracy of the dependent meter. Note that the term “calibration” in this context does not refer to the standard method of calibrating flow meter with a ‘prover’ but a technique to calculate correction multiplier for flow meter in other to improve the performance of hydraulic models.

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Cheesewright, Robert, and Colin Clark. "Experimental Investigation of the Influence of External Vibrations on Coriolis Mass Flow Meters." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32210.

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The Coriolis flow meter is basically a vibrating tube device; it is therefore potentially susceptible to disruption by external vibrations transmitted from the environment in which the meter is mounted. The paper reports the findings from a carefully structured experimental study in which the results of both analysis and numerical simulation studies were used to guide the choice of vibration frequencies and the directions and the spatial distributions of the vibrations. The total of eight different meters from five different manufacturers covered a wide range of meter geometries and drive frequencies. In addition to comparisons of the flow rates indicated by the meters with independent measures of the flow rate, all the tests involved the recording of raw signals from the displacement sensors so that the effects of using different techniques to extract the phase relationship between these signals could be investigated. All the tests were performed using cold (room temperature) water as the working fluid. The results of the study show that vibrations at the meter drive frequency caused errors in all meters. Vibrations at other frequencies also caused errors in several meters but these errors appear to be due to the algorithm (implemented in the meter electronics) used to extract the phase difference (the measurand) between the sensor signals. However, the complete study suggests that, by suitable choices of meter mechanical design and of the algorithm used to determine the phase difference, it is possible to make a meter which is unaffected by vibrations at any frequency other than the meter drive frequency (provided only that the meter tube motion produced by the vibration is smaller than that produced by the meter drive). For vibrations at the drive frequency the results show that (in general agreement with the analytical and numerical studies) the magnitude of the error depends on the phase relationship between the imposed vibration and the meter drive. Errors also depend on the spatial distribution of the vibration (e.g. the error is different for the same amplitude of vibration applied uniformly to a meter and applied to one end only of the meter). Methods for reducing drive frequency errors are discussed but it is concluded that it may not be possible to eliminate these errors completely.

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Chen, Gang, Guangjun Cao, Weihua Zhang, Suhong Fu, Shuhong Liu, Yulin Wu, and Deming Liu. "Prediction Meter Factor of Turbine Meter Considering the Effects of Cavitation." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78476.

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Turbine meters are wildly used in many fields for flow measurement with high accuracy and good repeatability, but the curve between meter factor and flow rates is affected by cavitation flow inside the meter. Cavitation is the main physical phenomenon which will have great effects on meter factor of turbine meters, especially at large flow rate. The meter factor will change at different cavitation number and will increase when the cavitation number decreases. In order to study its effects on meter factor, transient unsteady numerical simulation is carried out with RNG turbulence model and UDFs (User Defined Functions) based on torque balance equation in FLUENT software. The condensation/evaporation Cavitation Model is included at the simulation process. The results showed that the meter factor increased with the decrease of the cavitation number, and the meter factor is larger than at non-cavitation condition. Also the dynamic characteristics of the turbine flow meter impeller are obtained for the prediction of its meter factor and pressure distributions are obtained by the unsteady numerical simulation. The bearing friction drag is included in the torque balance equation, which is deduced from the theory of bearing.

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Park, Kyung-Am, Haeman Choi, Younkyun Oh, and Dugki Lee. "Performance Enhancement of Wet Gas Flow Meter." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31086.

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Wet gas flow meters are used in the gas flow meter manufacturing industries as a reference meter. Also those meters are used for gas flow measurement in many areas. Oil is suggested for sealing fluid in a wet gas flow meter. But water is used because of cheap and easy handling fluid in the industries. In this case, the inlet gas flow rate is different with the outlet gas flow rate because the evaporation of water in the chamber. It is important to estimate the rate of water evaporation and effects on flow measurement error. The humidity of wet gas in the outlet of a flow meter was measured. Flow measurement error due to water evaporation is about 2%. Those results will be useful for flow measurement error reduction of wet gas flow meter using water as sealing fluid. The new developed wet gas meter measured pulse and frequency in encoder through magnetic coupling between the chamber and an encoder. The flow quantity was compensated with adjustment of flow rate error. So the rangeability and error of flow measurement were enhanced remarkably.

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Zhang, Xiao-Zhang. "Theory to Help the Use of Electromagnetic Flow Meters." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31064.

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Compared with other flow meters, the theory of electromagnetic flow meter is well developed. Until now, we are able to predict the three dimensional characteristics of this kind of flow meters with reasonable accuracy. This has given much help to the designers to improve the flow meters. On the other hand, the theory can offer a tool for the users of this kind of flow meters to judge the application situations, estimate the possible measurement error, etc. This paper introduces the recent work of the author on the theory of the electromagnetic flow meter. The basic physical conceptions and equations are given with a brief history review of the theory research. Several examples are given of using the theory to analyze the meters’ behavior in different application situations. They are: effect of the conducting pipe connections; errors caused by a pipe wall of different electromagnetic properties; gas-liquid flow and errors caused by a relative motion of the probe.

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Fangxing, Liu, He Qing, Hu Shiyan, Wang Lei, and Jia Zhengsen. "Estimation of Smart Meters Errors Using Meter Reading Data." In 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). IEEE, 2018. http://dx.doi.org/10.1109/cpem.2018.8501256.

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Valigi, E., and E. Di Marino. "Networks optimization with advanced meter infrastructure and smart meters." In 20th International Conference and Exhibition on Electricity Distribution (CIRED 2009). IET, 2009. http://dx.doi.org/10.1049/cp.2009.0842.

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Ferreira, Ana Lui´sa A. S., Andre´ Paulo Kotchetkoff Neto, and Ma´rcio Manha˜es Gomes de Almeida. "Effects of Ultrasonic Flowmeter Internal Diameter Differences on the OSBRA Pipeline Measurement Results." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31110.

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The objective of this paper is to describe the effect of the differences between the pipe and the ultrasonic flowmeter internal diameters on the flow-rate measurement results, and to compare the values found with the differences on the pipe balance. The work included field analysis, numerical simulation and meter calibration. The ultrasonic meter balance differences were the reason for this research. The field analysis presents the balance and internal diameter differences. The numerical simulations comprise one, two and three-path meters with arrangements similar to the OSBRA meters. Three flowmeters were calibrated with water and different internal diameter meter runs. The results of the calibrations were compared with the results of the simulations, and also a comparison was made between the simulations and the actual field measurements. The conclusion is that internal diameter differences may generate differences in the ultrasonic flowmeter result, but the differences expected for OSBRA flowmeter results were less than 0.5% which is significantly less than the observed balance differences.

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Kalivoda, Raymond J., Jim H. Smith, and Nicole L. Gailey. "Dynamic Testing." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33758.

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Dynamic factory testing is an important step in the manufacturing of ultrasonic meters for custody transfer and other high accuracy petroleum applications. By utilizing a multiple product, high accuracy test system and a proper test program, a meter’s performance can be simulated over a wide flow and viscosity operating range. The test results give the user a detailed graph of the meter’s performance over the actual site operating parameters. The test verifies the meter’s performance prior to shipment but more importantly provides k-factor sensitivity to optimize measurement accuracy throughout the operating range. This paper outlines the theoretical basis and fundamentals of dynamic testing. It illustrates the process with data from an ultrasonic meter factory test recently conducted for a North Sea operating company. The meter was a 12 inch multi-path ultrasonic meter operating over a flow range of 636 to 1,113 m3/h (4,000 to 7,000 BPH) and a viscosity range of 5 to 350 cSt. The details of dynamic testing and the relationship between the measurement accuracy of a meter and dynamic testing will be the focus of this paper. It will include: • The fundamental operating principle of ultrasonic • Fluid dynamic properties such as boundary layer and flow profiles • The characteristics of the flow profiles in the different flow regimes that affect crude oil measurement • The dynamic operating range of crude oil meters • How dynamic testing is used in factory testing to verify the performance of a meter • Results of the 12 inch multi-path ultrasonic meter factory testing This paper will provide the necessary information to fully understand the basis and proper methods for dynamic testing to determine the operating performance of an ultrasonic meter.

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Smulski, Michael L. "State of the Art of Ultrasonic Liquid Flow Measurement and it’s Impact on Automated Leak Detection in Pipelines." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-426.

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The state of the art of ultrasonic liquid flow measurement has improved greatly in the past decade to where this technology exhibits accuracy equivalent to turbine meter systems, while retaining several advantages over turbine meters. Testing of a four path non-intrusive meter used for leak detection on the Trans–Alaska Pipeline is discussed. Performance is detailed, and future applications for ultrasonic flow measurement technology are reviewed.

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Звіти організацій з теми "Metcer"

Sanford, Thomas B., James A. Carlson, and Mark D. Prater. An Electromagnetic Vorticity Meter. Fort Belvoir, VA: Defense Technical Information Center, November 1995. http://dx.doi.org/10.21236/ada302223.

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Pikin A., A. Kponou, J. Ritter, and V. Zajic. Pepper Pot Emittance Meter. Office of Scientific and Technical Information (OSTI), July 2006. http://dx.doi.org/10.2172/1061835.

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Burrell, Anthony. Behind-the-Meter Storage. Office of Scientific and Technical Information (OSTI), December 2021. http://dx.doi.org/10.2172/1835819.

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Marcath, Matthew, Douglas Mayo, and Cameron Bates. Modeling the Fission Meter. Office of Scientific and Technical Information (OSTI), April 2021. http://dx.doi.org/10.2172/1779625.

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Brownlee, N. Traffic Flow Measurement: Meter MIB. RFC Editor, January 1997. http://dx.doi.org/10.17487/rfc2064.

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Brownlee, N. Traffic Flow Measurement: Meter MIB. RFC Editor, October 1999. http://dx.doi.org/10.17487/rfc2720.

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Brady, Michael H. The 3.5-Meter Telescope Enclosure. Fort Belvoir, VA: Defense Technical Information Center, April 1994. http://dx.doi.org/10.21236/ada280949.

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Andersen, C., S. Hoogendoom, B. Hudson, J. Prince, K. Teichert, J. Wood, and K. Chase. Liquid metal Flow Meter - Final Report. Office of Scientific and Technical Information (OSTI), January 2007. http://dx.doi.org/10.2172/903080.

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Terrence A. Grimley. ULTRASONIC METER TESTING FOR STORAGE APPLICATIONS. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/766361.

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Kerr, P. L. Fission Meter Information Barrier Attribute Measurement System: Task 1 Report: Document existing Fission Meter neutron IB system. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1347672.

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