Relevant bibliographies by topics / Hygrometers

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hygrometers'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Hygrometers"

1

Stroup, William H., James T. Peeler, and Kent Smith. "Evaluation Of Precision Estimates For Fiber-Dimensional And Electrical Hygrometers For Water Activity Determinations." Journal of AOAC INTERNATIONAL 70, no. 6 (November 1, 1987): 955–57. http://dx.doi.org/10.1093/jaoac/70.6.955.

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Abstract The precision of instruments used in 3 collaborative studies conducted within the Food and Drug Administration over a 4-year period (1981, 1982, 1984) for water activity (a„) determinations according to the official AOAC method is evaluated. Calibration responses of the instruments were tested for linearity over the a„ range from 0.75 to 0.97. Average absolute percent difference between predicted and assigned a, values for the linear model ranged from 0.3 to 0.7% for a fiber-dimensional hygrometer (Abbeon) and 3 electrical hygrometers (Beckman, Rotronics, and Weather Measure). The calibration responses for another electrical hygrometer (Hygrodynamics) were nonlinear. The fiber-dimensional hygrometer yielded mean a„ values and precision estimates that did not differ significantly from those obtained with the electrical hygrometers for (NH4)2S04 slush, KN03 slush, sweetened condensed milk, pancake syrup, and cheese spread. However, the mean a„ value for a soy sauce was 0.838 for the electrical hygrometers compared with 0.911 for the fiber-dimensional hygrometer. The fiber-dimensional hygrometer was affected by a volatile components) in the soy sauce that caused an erroneously high a„ value. Pooled estimates of reproducibility (5X) in the 3 studies were 0.008 for the fiber-dimensional hygrometer and 0.010 for the electrical hygrometers; these values were not significantly different from those reported in the study that verified the current official AOAC method.
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Foken, T., and H. Falke. "Technical Note: Calibration instrument for the krypton hygrometer KH20." Atmospheric Measurement Techniques Discussions 5, no. 1 (February 17, 2012): 1695–715. http://dx.doi.org/10.5194/amtd-5-1695-2012.

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Abstract. A calibration instrument for krypton hygrometers (KH20, Campbell Sci.) with variable path length is presented. This unit allows for in-situ calibrations of the krypton hygrometer, which is typically not very stable over time, during measuring campaigns. It was constructed mainly for application at high altitudes and low temperatures, where further improvements are needed to the IR-hygrometers which are normally used. The changing path length requires that a changing concentration of the absorber be simulated. Because oxygen absorbs more strongly than water vapour, the calibration is made against oxygen and transferred to water vapour. The design of the calibration instrument is made as one unit containing a stepper motor system, PC and humidity sensor. For the calibration, it is necessary to install the krypton hygrometer on this unit.
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Foken, T., and H. Falke. "Technical Note: Calibration device for the krypton hygrometer KH20." Atmospheric Measurement Techniques 5, no. 8 (August 1, 2012): 1861–67. http://dx.doi.org/10.5194/amt-5-1861-2012.

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Abstract. A calibration device for krypton hygrometers (KH20, Campbell Scientific, Inc.) with variable path length is presented. This unit allows for in-situ calibrations of the krypton hygrometer, which is typically not very stable over time, during measuring campaigns. It was constructed mainly for application at high altitudes and low temperatures, where further improvements are needed to the IR-hygrometers which are normally used. The changing path length requires that a changing concentration of the absorber be simulated. Because oxygen absorbs more strongly than water vapour, the calibration is made against oxygen and transferred to water vapour. The design of the calibration instrument is made as one unit containing a stepper motor system, PC and humidity sensor. For the calibration, it is necessary to install the krypton hygrometer on this unit.
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4

Vance, A. K., S. J. Abel, R. J. Cotton, and A. M. Woolley. "Performance of WVSS-II hygrometers on the FAAM research aircraft." Atmospheric Measurement Techniques 8, no. 3 (March 28, 2015): 1617–25. http://dx.doi.org/10.5194/amt-8-1617-2015.

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Abstract. We compare the performance of five hygrometers fitted to the Facility for Airborne Atmospheric Measurement's (FAAM) BAe 146-301 research aircraft using data from approximately 100 flights executed over the course of 2 years under a wide range of conditions. Bulk comparison of cloud free data show good agreement between chilled mirror hygrometers and a WVSS-II fed from a modified Rosemount inlet, but that a WVSS-II fed from the standard flush inlet appears to over-read compared to the other instruments, except at higher humidities. Statistical assessment of hygrometer performance in cloudy conditions is problematic due to the variable nature of clouds, so a number of case studies are used instead to investigate the performance of the hygrometers in sub-optimal conditions. It is found that the flush inlet is not susceptible to either liquid or solid water but that the Rosemount inlet has a significant susceptibility to liquid water and may also be susceptible to ice. In all conditions the WVSS-II responds much more rapidly than the chilled mirror devices, with the flush inlet-fed WVSS-II being more rapid than that connected to the Rosemount.
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Vance, A. K., S. J. Abel, R. J. Cotton, and A. M. Woolley. "Performance of WVSS-II hygrometers on the FAAM Research Aircraft." Atmospheric Measurement Techniques Discussions 7, no. 8 (August 19, 2014): 8643–67. http://dx.doi.org/10.5194/amtd-7-8643-2014.

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Abstract. We compare the performance of five hygrometers fitted to the Facility for Airborne Atmospheric Measurement's (FAAM) BAe 146-301 research aircraft using data from approximately one hundred flights executed over the course of two years under a wide range of conditions. Bulk comparison of cloud free data show good agreement between chilled mirror hygrometers and a WVSS-II fed from a modified Rosemount inlet but that a WVSS-II fed from the standard flush inlet appears to over read compared to the other instruments, except at higher humidities. Statistical assessment of hygrometer performance in cloudy conditions is problematic due to the variable nature of clouds, so a number of case studies are used instead to investigate the performance of the hygrometers in sub optimal conditions. It is found that the flush inlet is not susceptible to either liquid or solid water but that the Rosemount inlet has a significant susceptibility to liquid water; it is not susceptible to ice. In all conditions the WVSS-II respond much more rapidly than the chilled mirror devices, with the flush inlet-fed WVSS-II being more rapid than that connected to the Rosemount.
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6

Meyer, J., C. Rolf, C. Schiller, S. Rohs, N. Spelten, A. Afchine, M. Zöger, et al. "Two decades of water vapor measurements with the FISH fluorescence hygrometer: a review." Atmospheric Chemistry and Physics Discussions 15, no. 5 (March 12, 2015): 7735–82. http://dx.doi.org/10.5194/acpd-15-7735-2015.

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Abstract. The Fast In-situ Stratospheric Hygrometer (FISH) is an airborne Lyman-α photofragment fluorescence hygrometer for accurate and precise measurement of total water mixing ratios (WMR) (gas phase + evaporated ice) in the upper troposphere and lower stratosphere (UT/LS) since almost two decades. Here, we present a comprehensive review of the measurement technique, calibration procedure, accuracy and reliability of FISH. A crucial part for the FISH measurement quality is the regular calibration to a water vapor reference, namely the commercial frostpoint hygrometer DP30. In the frame of this work this frostpoint hygrometer is compared to German and British traceable metrological water standards and its accuracy is found to be 2–4%. Overall, in the range from 4–1000 ppmv, the total accuracy of FISH was found to be 6–8% as stated also in previous publications. For lower mixing ratios down to 1 ppmv, the uncertainty reaches a lower limit of 0.3 ppmv. For specific, non-atmospheric conditions, as set in experiments at the AIDA chamber – namely mixing ratios below 10 and above 100 ppmv in combination with high and low pressure conditions – the need to apply a modified FISH calibration evaluation has been identified. The new evaluation improves the agreement of FISH with other hygrometers to ± 10% accuracy in the respective mixing ratio ranges. Further, a quality check procedure for high total water measurements in cirrus clouds at high pressures (400–500 hPa) is introduced. The performance of FISH in the field is assessed by reviewing intercomparisons of FISH water vapor data with other in-situ and remote sensing hygrometers over the last two decades. We find that the agreement of FISH with the other hygrometers has improved over that time span from overall up to ±30% or more to about ±5–20% @ < 10 ppmv and to ±0–15% @ > 10 ppmv. As presented here, the robust and continuous calibration and operation procedures of the FISH instrument over the last two decades, establish the position of FISH as one of the core instruments for in-situ observations of water vapor in the UT/LS.
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Meyer, J., C. Rolf, C. Schiller, S. Rohs, N. Spelten, A. Afchine, M. Zöger, et al. "Two decades of water vapor measurements with the FISH fluorescence hygrometer: a review." Atmospheric Chemistry and Physics 15, no. 14 (July 30, 2015): 8521–38. http://dx.doi.org/10.5194/acp-15-8521-2015.

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Abstract. For almost two decades, the airborne Fast In-situ Stratospheric Hygrometer (FISH) has stood for accurate and precise measurements of total water mixing ratios (WMR, gas phase + evaporated ice) in the upper troposphere and lower stratosphere (UT/LS). Here, we present a comprehensive review of the measurement technique (Lyman-α photofragment fluorescence), calibration procedure, accuracy and reliability of FISH. Crucial for FISH measurement quality is the regular calibration to a water vapor reference, namely the commercial frost-point hygrometer DP30. In the frame of this work this frost-point hygrometer is compared to German and British traceable metrological water standards and its accuracy is found to be 2–4 %. Overall, in the range from 4 to 1000 ppmv, the total accuracy of FISH was found to be 6–8 %, as stated in previous publications. For lower mixing ratios down to 1 ppmv, the uncertainty reaches a lower limit of 0.3 ppmv. For specific, non-atmospheric conditions, as set in experiments at the AIDA chamber – namely mixing ratios below 10 and above 100 ppmv in combination with high- and low-pressure conditions – the need to apply a modified FISH calibration evaluation has been identified. The new evaluation improves the agreement of FISH with other hygrometers to ± 10 % accuracy in the respective mixing ratio ranges. Furthermore, a quality check procedure for high total water measurements in cirrus clouds at high pressures (400–500 hPa) is introduced. The performance of FISH in the field is assessed by reviewing intercomparisons of FISH water vapor data with other in situ and remote sensing hygrometers over the last two decades. We find that the agreement of FISH with the other hygrometers has improved over that time span from overall up to ± 30 % or more to about ± 5–20 % @ < 10 ppmv and to ± 0–15 % @ > 10 ppmv. As presented here, the robust and continuous calibration and operation procedures of the FISH instrument over the last two decades establish the position of FISH as one of the core instruments for in situ observations of water vapor in the UT/LS.
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Moiz, S. A., Kh S. Karimov, and N. D. Gohar. "Orange Dye Thin Film Resistive Hygrometers." Eurasian Chemico-Technological Journal 6, no. 3 (July 13, 2017): 179. http://dx.doi.org/10.18321/ectj609.

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<p>An investigation on electrical properties of organic semiconductor, Orange Dye (OD), C<sub>17</sub>H<sub>17</sub>N<sub>5</sub>O<sub>2</sub>, resistive hygrometers was made in present study. Organic thin films were deposited on substrate by different thin film deposition methods, such as by vacuum evaporation method (Aluminum/Orange Dye/Aluminum), by spin-coater method from solution (Gold/Orange Dye/Gold), and in normal gravity condition by placing drops of OD solutions over the surface of tissue paper (Tin metal/Orange Dye in tissue paper/Net metal). As OD is also temperature sensitive, that is why to compensate temperature effect for the measurement of humidity dependent electrical properties, special arrangement was provided over the same substrate, but encapsulated from humidity environment. The AC (frequency of 10 Hz) and DC resistances were evaluated from current-voltage characteristics of all samples of resistive hygrometers, measured in the temperature interval range of 20-70 °C and relative humidity range of 30-80%. It was observed that the resistance of the OD decreases with a rise in temperature. Similarly, OD resistance is observed to decrease with increase in humidity level. The relative resistance ratio to relative humidity was found 30 and 12 for the samples deposited by vacuum evaporation and from solution by spin coater respectively. Humidity dependent on electrical properties of these resistive hygrometer make them attractive for use in development of industrial humidity meters.</p>
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Yang, Ju, Hong Yi, Zhangyuan Li, and Changqing Ren. "Automatic calibration system of thermo-hygrometers." Journal of Physics: Conference Series 2554, no. 1 (July 1, 2023): 012002. http://dx.doi.org/10.1088/1742-6596/2554/1/012002.

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Abstract Machine vision technology is an interdisciplinary subject involving plenty of fields such as artificial intelligence, neurobiology, psychophysics, computer science, image processing and pattern recognition, etc. In recent years, with rapid development of the technology, machine vision recognition is widely used in many fields of detection and control. For thermo-hygrometers calibration, the manual operation method is used traditionally. This has proven to be a cumbersome, time-consuming, and error-prone activity, as there are lots of models and quantities of thermo-hygrometers to be calibrated. Therefore, an automatic thermo-hygrometers calibration system was developed by using vision recognition technology in combination with automatic movement control as well as a purposely structured database management software. It can complete the calibration and the verification task accurately, timely and efficiently. It has drastically reduced the workload, improved accuracy, and realized the automatic calibration of the thermo-hygrometers.
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Tsirlin, O. V., and A. A. Yushkin. "Calibrating electrical sorption hygrometers." Measurement Techniques 30, no. 2 (February 1987): 204–6. http://dx.doi.org/10.1007/bf00865882.

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Dissertations / Theses on the topic "Hygrometers"

1

Bell, Stephanie A. "Validation of the NPL gravimetric hygrometer." Thesis, City University London, 1995. http://openaccess.city.ac.uk/7703/.

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The gravimetric hygrometer of the UK National Physical Laboratory (NPL) provides a first-principles realisation of mixing ratio - the most fundamental measure of the humidity of a gas. The operation of the NPL gravimetric hygrometer has been validated to demonstrate its satisfactory performance as a primary standard for humidity within the UK national measurement system. The measurement performance of the gravimetric hygrometer has been characterised for mixing ratios within the range 0.01 g kg to 155 g kg 4 (equivalent at atmospheric pressure to a dew-point range of -60 °C to +60 °C). The significant aspects of the measurement have been assessed in detail; these being the balances and weighing processes, the efficiency of collecting water and dry gas, and the effects of stray water in the instrument. Sources of systematic error have been identified and their effects quantified. Wherever possible, such errors have been eliminated or reduced. Elsewhere, numerical corrections have been evaluated and applied to the results of measurements. The overall uncertainty of measurement for the gravimetric hygrometer has been estimated by evaluating the uncertainties contributed by each aspect of the measurement, and combining these statistically to find the overall effect. The estimated uncertainty at a level of confidence of approximately 95% (a coverage factor of k=2) was found to range between 0.015 percent of value at the highest humidity considered, near 155 g kg 1, and 1.27 percent of value at the lower limit of 0.01 g kg1. The gravimetric hygrometer has been intercompared with the humidity generator which is the NFL standard for dew point, using nitrogen as the carrier gas in these measurements. For the conversion between values of dew point and mixing ratio, the uncertainties in the reference functions have been reviewed for the vapour pressure curve of water, and for the water vapour enhancement factor which accounts for the non-ideal behaviour of humid gases. A new calculation of the enhancement factor for nitrogen is presented. The uncertainties due to sampling were also evaluated. On average, the uncertainties due to the reference functions and those due to sampling were found to comparable with the uncertainty in the gravimetric measurements. Taking all these into account, the intercomparison measurements agreed to within the combined uncertainties of the two instruments.
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Klostermann, Tim [Verfasser]. "Entwicklung und Erprobung des Hygrometer for Atmospheric Investigations / Tim Klostermann." Wuppertal : Universitätsbibliothek Wuppertal, 2011. http://d-nb.info/1014860393/34.

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Turnbull, Katharine Frances Vogan. "A surface acoustic wave frost point hygrometer for measurements of atmospheric water vapour." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619580.

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Eden, L. "Measurements of atmospheric water vapour using a balloon-borne surface acoustic wave frost point hygrometer." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598746.

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A frost point hygrometer is described in this thesis which uses surface acoustic waves (SAWs) to detect water vapour condensation. The SAW device crystal is cooled by a thermoelectric cooler until condensation occurs, at which point, water vapour loading onto the SAW device causes changes in the SAW velocity and amplitude. Two methods of determining the frost point temperature are outlined in this thesis. The first uses a feedback loop algorithm to maintain a constant amount of water vapour on the SAW device and hence keep the temperature of the device at the frost point. The second uses heating and cooling cycles to oscillate the SAW device temperature above and below the frost paint. Changes in the SAW properties are then used to detect the condensation-evaporation equilibrium point which is equal to the frost point. The use of SAWs rather than a conventional optical detection system in this hygrometer allows a faster response time, increased sensitivity, and decreased risk of contamination. Between September 2001 and February 2004, the SAW hygrometer was flown on 28 balloon flights, in various configurations. All of these flight data sets show agreement with radiosonde relative humidity measurements to within 1%, using given criteria for extraction of reliable SAW hygrometer measurements. Accurate lower and mid tropospheric measurements have been made on each flight and four flights show accurate upper tropospheric and lower stratospheric measurements with water vapour mixing ratio values of less than 5 ppmv. The Hibiscus campaign flights in Bauru, Brazil, show excellent agreement between the different instruments measuring water vapour on the flight train and the SAW hygrometer. These data are discussed in conjunction with auxiliary data and model backward trajectories. Two different backward trajectory models have been used to assess the possible mechanisms of transport of water vapour above Bauru, one of which is a large scale model and the other is a meso-scale model. A sharp contrast in the air parcel transport above and below the tropical tropopause layer (TTL) is seen, with large scale convection or descent controlling the water vapour mixing ratios below the TTL, and a combination of large and small scale fields controlling the water vapour in and above the TTL.
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Keramitsoglou, Iphigenia. "On measurements of upper tropospheric humidity." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313660.

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Davis, Sean Michael. "Airborne in situ measurements of cirrus cloud total water using a laser hygrometer and intercomparisons with satellite observations." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284463.

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Buchholz, Bernhard [Verfasser], Volker [Akademischer Betreuer] Ebert, Bernd [Akademischer Betreuer] Jähne, and Andreas [Akademischer Betreuer] Dreizler. "Entwicklung, Primärvalidierung und Feldeinsatz neuartiger, kalibrierungsfreier Laser-Hygrometer für Forschungsflugzeuge / Bernhard Buchholz. Betreuer: Volker Ebert ; Bernd Jähne ; Andreas Dreizler." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110978871/34.

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Sargent, Maryann Racine. "The Response of Stratospheric Water Vapor to a Changing Climate: Insights from In Situ Water Vapor Measurements." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10623.

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Stratospheric water vapor plays an important role in the Earth system, both through its role in stratospheric ozone destruction and as a greenhouse gas contributing to radiative forcing of the climate. Highly accurate water vapor measurements are critical to understanding how stratospheric water vapor concentrations will respond to a changing climate. However, the past disagreement among water vapor instruments on the order of 1 – 2 ppmv hinders understanding of the mechanisms which control stratospheric humidity, and the reliable detection of water vapor trends. In response to these issues, we present a new dual axis water vapor instrument that combines the heritage Harvard Lyman-\(\alpha\) hygrometer with the newly developed Harvard Herriott Hygrometer (HHH). The Lyman-\(\alpha\) instrument utilizes ultraviolet photo-fragment fluorescence detection, and its accuracy has been demonstrated though rigorous laboratory calibrations and in situ diagnostic procedures. HHH employs a tunable diode near-IR laser to measure water vapor via direct absorption in a Herriott cell; it demonstrated in-flight precision of 0.1 ppmv (1-sec) with accuracy of 5%±0.5 ppmv. We describe these two measurement techniques in detail along with our methodology for calibration and details of the measurement uncertainties. We also examine the recent flight comparison of the two instruments with several other in situ hygrometers during the 2011 MACPEX campaign, in which five independent instruments agreed to within 0.7 ppmv, a significant improvement over past comparisons. Water vapor measurements in combination with simultaneous in situ measurements of \(O_3\), CO, \(CO_2\), HDO, and HCl are also used to investigate transport in the Tropical Tropopause Layer (TTL). Data from the winter 2006 CR-AVE campaign and the summer 2007 TC4 campaign are analyzed in a one-dimensional mixing model to explore the seasonal importance of transport within the TTL via slow upward ascent, convective injection, and isentropic transport from the midlatitude stratosphere. The model shows transport from midlatitudes to be significant in summer and winter, affecting ozone concentrations and therefore the radiative balance of the TTL. It also shows significant convective influence up to 420 K potential temperature in both seasons, which appreciably increases the amount of water vapor above the tropopause.
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Junior, Vladimir Geraseev. "Proposta de sistema automatizado para apoio à inspeção de termohigrômetros digitais específicos." Universidade de Taubaté, 2014. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=761.

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Atualmente, há diversos modelos de instrumentos termohigrômetros, utilizados em grande variedade de aplicações nas organizações, cujas medições de temperatura e umidade relativa se fazem necessárias. Nas atividades referentes ao desenvolvimento, fabricação e utilização desses instrumentos, há a necessidade de inspeções funcionais neles, para avaliações sobre as medições proporcionadas. De forma pertinente ao exposto, neste trabalho, é apresentada abordagem sobre os elementos do projeto conceitual de um sistema que utiliza visão computacional para apoio à realização da inspeção de tipo específico de termohigrômetro digital, em operações que envolvem a leitura e o registro das medidas indicadas no instrumento, como parte do procedimento adotado para a inspeção em questão. O tipo de termohigrômetro digital abordado é caracterizado: por ser de indicação digital em única face do invólucro; possuir mostrador de cristal líquido com dígitos de sete segmentos e notação em ponto decimal; apresentar em regiões distintas os dados das medições simultâneas de temperatura e umidade relativa; por não dispor de recursos de comunicação para aquisição dos dados das medições. O projeto conceitual do sistema abordado é caracterizado por explorar conceitos da aplicação de recursos de aquisição de imagens e reconhecimento óptico de caracteres, com a finalidade de dispor imagens e dados em meios computacionais, de forma automatizada, para auxiliar as operações de leitura e registro das medidas indicadas no termohigrômetro sob inspeção, sendo as informações resultantes acessíveis por outros sistemas computacionais. Os componentes para experimentos apresentaram resultados satisfatórios nos testes práticos, validando os princípios de funcionamento dos elementos implementados, do sistema de inspeção e da aplicação. Os objetivos propostos foram atingidos, haja vista que os estudos expostos permitem oferecer contribuição para as atividades referentes ao desenvolvimento, fabricação e utilização de termohigrômetros do tipo em questão, com ênfase para o âmbito daquelas relacionadas aos segmentos das aplicações de sistemas computacionais, voltadas para automatizações de processos de inspeção desse tipo de instrumento, para as quais possam ser estendidos os conceitos abordados.
Currently, there are many thermo hygrometer instruments that are used in several applications in organizations in which measurements of temperature and relative humidity are required. In order to verify the measurements provided by these instruments, it is necessary to perform functional inspection tests in them, in development, manufacture and usage activities, in order to verify the measurements provided by these instruments. In this paper, an approach of the elements used in a conceptual system using computer vision to support digital thermo hygrometer inspection is presented. The computer vision is used in operations that involve reading and recording of measurements in the instrument as part of the procedure adopted for their inspection. The kind of digital thermo hygrometer addressed in this paper is a digital instrument, with a liquid crystal display using seven-segment digits and a decimal point notation, which shows simultaneous measurements of temperature and relative humidity in different locations of its display, and which doesnt have communication resources for reading the measurement data. The system conceptual design explores concepts that use resources for acquiring images and for optical character recognition, in order to automatically provide images and data in a computer media, and assist the operations of reading and recording measures indicated by the thermo hygrometer. The resulting information can be accessible by other computer systems. The components used for experiments presented satisfactory results in practical tests, validating the principles of operation of the implemented elements of the inspection system and application. The proposed objectives were achieved, given the fact that the studies exposed here make it possible to offer assistance to activities related to the development, manufacture and use of thermo hygrometers of the type in question, with emphasis on those related to the scope of segments of applications for computing systems oriented to the automation of inspection processes of this type of instrument, for which the concepts covered may be extended.
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Piepmeier, Jeffrey R. "Remote sensing of ocean wind vectors by passive microwave polarimetry." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15027.

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Books on the topic "Hygrometers"

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Payne, Richard E. Trials of a new relative humidity sensor. Woods Hole, Mass: Upper Ocean Processes Group, Woods Hole Oceanographic Institution, 2004.

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Proskuri͡akov, R. M. Teoreticheskie osnovy i analiz sistem termovakuumnoĭ vlagometrii. Leningrad: Izd-vo Leningradskogo universiteta, 1991.

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Różdżyński, Kazimierz. Micro-variability of characteristics of thermo- and hygrometric circuits in automatic meteorological stations of the State Hydrological Meteorological Service (PSHM). Warsaw: Institute of Meteorology and Water Management, National Research Institute, 2013.

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Hekmat, D. Calibration and intercomparison of four hygrometer systems. 8th ed. Berkeley, CA: Lawrence Berkely Laboratory, 1992.

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Gatley, D. P. Understanding psychrometrics. Atlanta, GA: ASHRAE, 2002.

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Forecast Systems Laboratory (U.S.), ed. Impact of multichannel passive microwave radiometer data on the LAPS moisture analysis. Boulder, Colo: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Forecast Systems Laboratory, 1998.

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Mo, Tsan. Microwave humidity sounder calibration algorithm. Washington, DC: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, 2004.

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Mo, Tsan. Microwave humidity sounder calibration algorithm. Washington, DC: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, 2004.

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Mo, Tsan. Microwave humidity sounder calibration algorithm. Washington, DC: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, 2004.

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R, Johnson Richard. Fundamentals of thermodynamics & psychrometrics: A sel-directed learning course for professional development. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc., 1997.

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Book chapters on the topic "Hygrometers"

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Hollerbach, Teresa. "The Measuring Instruments." In Sanctorius Sanctorius and the Origins of Health Measurement, 209–301. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-30118-6_7.

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AbstractAs the title suggests, this chapter deals with the most famous of the devices which Sanctorius developed to measure and to quantify physiological change: pulsilogia, thermoscopes, hygrometers, and balances. Having attracted considerable scholarly attention, they form the backbone of the narrative that identifies Sanctorius as a great innovator, who founded a new medical science, a science to which mechanization, measurement, and numerical values were integral. The findings of the foregoing chapters allow us now to go beyond this selective account of Sanctorius and his works and to reevaluate his celebrated measuring instruments and their use from a closer perspective. To this end, I explore their design and basic functioning, the contexts in which they emerged, how Sanctorius possibly used them, and what precisely they measured. In this connection, I also analyze two steelyards for the measurement of climatic conditions which have hitherto been largely ignored, thereby covering the whole range of Sanctorius’s measuring instruments. Moreover, I present the results of my reconstruction of the Sanctorian weighing chair and the attendant replication of his experimental practice, and thereby show how this approach opened up new perspectives on Sanctorius’s works, his doctrine of static medicine, and the function and purpose of his weighing chair.
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Gooch, Jan W. "Hygrometer." In Encyclopedic Dictionary of Polymers, 378. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6170.

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Gooch, Jan W. "Absorption Hygrometer." In Encyclopedic Dictionary of Polymers, 5. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_64.

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Nilsson, Lars-Olof, Kurt Kielsgaard Hansen, and Miguel Azenha. "Hygrometry." In Methods of Measuring Moisture in Building Materials and Structures, 73–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-74231-1_10.

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Vömel, Holger, and Pierre Jeannet. "Balloon-Borne Frostpoint-Hygrometry." In Monitoring Atmospheric Water Vapour, 39–53. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3909-7_3.

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Esquinas, Antonio Matías, and Ahmed S. BaHammam. "Behavior of Hygrometry During Noninvasive Mechanical Ventilation." In Humidification in the Intensive Care Unit, 81–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-02974-5_10.

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Rohrbough, Stephen F., John G. Ballinger, and Lyle E. Koehler. "A Balloon-Borne Hygrometer System for the Measurement of Atmospheric Water Vapor." In Isotope Techniques in the Hydrologic Cycle, 47–54. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm011p0047.

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Hurst, Dale F., Masatomo Fujiwara, and Samuel Oltmans. "Frost point hygrometers." In Field Measurements for Passive Environmental Remote Sensing, 37–55. Elsevier, 2023. http://dx.doi.org/10.1016/b978-0-12-823953-7.00015-0.

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"Chilled Mirror Hygrometers." In Water Vapor Measurement, 49–90. CRC Press, 2012. http://dx.doi.org/10.1201/9781466551978-10.

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"Optical Absorption Hygrometers." In Water Vapor Measurement, 131–42. CRC Press, 2012. http://dx.doi.org/10.1201/9781466551978-13.

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Conference papers on the topic "Hygrometers"

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Jachowicz, Ryszard, Jerzy Weremczuk, Daniel Paczesny, and Grzegorz Tarapata. "MEMS Based Dew Point Hygrometer With Optimal Self Adjusted Detection Threshold." In 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2008. http://dx.doi.org/10.1115/micronano2008-70134.

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A new system of dew point temperature hygrometer, based on semiconductor MEMS detector is presented in the paper. Many details of MEMS detector construction are given with details in the report. Basic idea of algorithms of detector control is also discussed. More attention is devoted to subalgorithm for self-adjusted detector threshold operation. Excellent dynamic parameters of the new hygrometer (i.e. 2÷5 dew point detections and temperature measurements per second), proved by the hygrometer tests, will be presented and described in the report. It means that presented hygrometer is 10÷100 times faster than conventional hygrometers. In the end of the paper two medical applications are demonstrated with clinical test results. The first application is for dermatology for TransEpidermal Water Loss (TEWL) factor of human skin. The second is focused on measurement of humidity in human nose cavity and human throat during breathing. In both case fast humidity measurements, with time constant of some 0.5s, have been required.
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Chiachung Chen. "Calibration and Uncertainty Analysis of Hygrometers." In 2005 Tampa, FL July 17-20, 2005. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2005. http://dx.doi.org/10.13031/2013.19091.

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Igor, Zakharov, Banev Kiril, Nicolova Elena, Diakov Dimitar, Olesia Botsiura, and Zakharov Alexandr. "Hygrometers Calibration: Features of Measurement Results Processing." In 2023 XXXIII International Scientific Symposium Metrology and Metrology Assurance (MMA). IEEE, 2023. http://dx.doi.org/10.1109/mma59144.2023.10317930.

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Georgin, Eric. "Response time measurement of hygrometers at LNE-CETIAT." In 19th International Congress of Metrology (CIM2019), edited by Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201924001.

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LNE-CETIAT has been involved in European project JRP HIT – EMPIR (www.empir-hit.eu). The objectives of this project were to improve the accuracy of industrial humidity measurements, to provide new traceability capabilities and to develop new calibration techniques at high temperatures up to 180 °C and under transient conditions. Considering the last aspect, LNE-CETIAT has worked on the development of a humidity step generator for studying response time of hygrometers. Indeed, classical calibrations are performed under quasi-static conditions whilst the end users measurement conditions are, most of the time, non-static or dynamic. In order to tackle this situation, LNE-CETIAT has started to developed dynamic humidity generator which enables response time measurement by applying humidity step to the device under test. In this article the test rig is presented as well as results obtained with chilled mirror hygrometers. A discussion about response time of chilled mirror concludes this work.
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FENOTTI, Fulvio, and David VASTY. "Humidity Calibration Automation." In 19th International Congress of Metrology (CIM2019), edited by Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201918003.

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This article describes an automated humidity calibration system developed in Trescal Italy using a software developed internally, a high resolution Digital Single-Lens Reflex (DSLR) camera, climatic chambers and chilled mirror hygrometers as reference standards.
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Berruti, G., M. Consales, A. Cutolo, A. Cusano, S. Buontempo, G. Breglio, M. Giordano, and A. Makovec. "Radiation tolerant fiber optic thermo-hygrometers for aerospace applications." In 2014 IEEE Metrology for Aerospace (MetroAeroSpace). IEEE, 2014. http://dx.doi.org/10.1109/metroaerospace.2014.6865997.

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Panchenko, A. Yu, and N. I. Slipchenko. "Teoretical discription of transformation function of adsorption microwave hygrometers." In 2010 20th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo 2010). IEEE, 2010. http://dx.doi.org/10.1109/crmico.2010.5632808.

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Scherino, L., E. J. Schioppa, A. Arapova, G. M. Berruti, W. J. Bock, A. Borriello, S. Campopiano, et al. "FOS-based thermo-hygrometers in the ATLAS Inner Detector." In Optical Fiber Sensors. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/ofs.2022.w4.38.

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We present the main steps of FOS (based on LPG and FBG) installation in the CERN-ATLAS experiment for temperature and humidity measurements, from laboratory calibrations and data acquisition chain development, to their installation and operation.
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Young, Sheng-Joue, and Yu-Jhih Chu. "Combined ZnO nanorod hygrometers and DSSCs for IOTs application." In 2021 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW). IEEE, 2021. http://dx.doi.org/10.1109/icce-tw52618.2021.9603024.

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Weremczuk, Jerzy, and Ryszard Jachowicz. "New methods of subcooled water recognition in dew point hygrometers." In Optoelectronic and Electronic Sensors IV, edited by Jerzy Fraczek. SPIE, 2001. http://dx.doi.org/10.1117/12.435909.

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Reports on the topic "Hygrometers"

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Meyer, C. W., J. T. Hodges, P. H. Huang, W. W. Miller, D. C. Ripple, and G. E. Scace. Calibration of hygrometers with the hybrid humidity generator. Gaithersburg, MD: National Institute of Standards and Technology, 2008. http://dx.doi.org/10.6028/nist.sp.250-83.

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Meyer, C. W., T. Herman, and W. W. Miller. Calibration of Hygrometers with the Hybrid Humidity Generator. National Institute of Standards and Technology, September 2021. http://dx.doi.org/10.6028/nist.sp.250-83r1.

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Porch, W., B. Balsley, M. Jensen, H. Cole, B. Lesht, J. Liljegren, S. Richardson, and H. Revercomb. Application of tethered balloon and kite measurements using chilled mirror hygrometers during the ARM WVIOP in the fall of 1996 in Oklahoma. Office of Scientific and Technical Information (OSTI), December 1997. http://dx.doi.org/10.2172/564112.

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Shakkottai, P., and E. Y. Kwack. Acoustic hygrometer. Final report. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/656826.

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Stuefer, Martin, and Telayna Gordon. Cryogenic Frostpoint Hygrometer (CFH) Instrument Handbook. Office of Scientific and Technical Information (OSTI), March 2018. http://dx.doi.org/10.2172/1427705.

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Ritsche, MT. Chilled Mirror Dew Point Hygrometer (CM) Handbook. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/1020567.

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Goldberger, Lexie. Chilled Mirror Hygrometer Aboard Aircraft (CMH-AIR) Instrument Handbook. Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1592575.

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Pencheva, Vasilka, Stoyan Penchev, Tanja Dreischuh, and Sergey Naboko. Dial Hygrometer Utilizing Powerful Laser Diodes: Progress towards Diurnal Operation. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, January 2021. http://dx.doi.org/10.7546/crabs.2021.01.04.

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Porch, W., A. Fernandez, and W. Spurgeon. Report of preliminary analysis of data from dew-point hygrometer profiles during the ARM 1996 WVIOP. Office of Scientific and Technical Information (OSTI), March 1997. http://dx.doi.org/10.2172/444058.

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