Tammarugwattana, Narin
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Preferred name
Tammarugwattana, Narin
Alternative Name
Tammarugwattana, N.
Main Affiliation
Email
narin.ta@kmitl.ac.th
15 results
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Item type:Publication, Real-Time Monitoring of Hydraulic Oil Deterioration Using a Hall Effect Sensor Under Operational Conditions(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study on optical and electronic properties of Sn-doped ZnPc(2013-10-29); ; Sn doped ZnPc films were deposited on intrinsic Si and glass substrates by organic source thermal co-evaporation technique with different deposition rates. Optical properties and electronic structure were characterized by UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS) respectively. The UV-Vis results showed that phase transition of ZnPc from α- phase to β-phase occurred when Sn:ZnPc deposition rate is 0.3:0.7 or higher. XPS results indicated that the outer s electron of Sn atom is transferred to the ZnPc. Broadening of the C 1s spectra is observed with the increasing of Sn deposition rate. This broadening corresponds to the change of molecular environment surrounding carbon atoms in the Sn-doped ZnPc films. © (2013) Trans Tech Publications, Switzerland. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of optical and electrical properties of tin doped cobalt-phthalocyanine thin films prepared by thermal co-evaporation(2018-09-05); ; ; The aim of this research is to study the specific properties e.g. surface morphology, optical absorption as well as electrical conductivity of tin-doped cobalt-phthalocyanine (CoPc) thin film prepared by thermal co-evaporation. The concentration of tin metal dopant is controlled via evaporation rate during film's preparation. The change of tin quantity leads to the significant changes not only in morphology but also in molecular packing of the doped films. Moreover, the dramatic increase in both carrier mobility and carrier concentration should provide the enhancement in electrical conductivity of the doped films. By controlling the specific properties of the tin-doped CoPc thin film, the increasing efficiency of optoelectronic applications based on metal-phthalocyanine could be achieved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Error analysis of temperature measurement system: A case of PT100(2009-01-01); ; Seangratipen, TawatchaiThis paper presents the study of uncertainty in measurement as well as the error compensation of the industrial temperature instrument under various conditions for precise and reliable results of the measurement. In this study, the temperature calibration system of PT100 was used as a case study. Data used in analysis were collected from 200 values of repetitive temperature measurement in the range of 25 °C to 100 °C using Data logger together with a computer to process, analyze, and collect in database system which was developed from Visual Basic. The efficiency and characteristics of the developed system were statistically analyzed from error, mean, standard deviation, and uncertainty of each measured value to improve the reliability of the instrument which is used in industrial processes. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Application of the OpenCV-python for personal identifier statement(2018-08-13); ; Sirisantisamrid, KasetWork attendance is one of the processes that either large or small companies need to be involved with. To reduce the time-consuming and improve the reliability of such process, this work proposes an alternative solution by applying the combinations of image processing and Viola Jones algorithm on the facial-employee database. The facial detection and recognition system shows the high accuracy over 90%. The proposed process not only improves the efficiency of the work attendance in term of data-collecting and data-analyzing but also possibly prevents the cheating of appearance compared to the old-fashion processes e.g. signing-paper or Radio Frequency Identification (RFID). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Application of webcam for inspection of rice grain quality by using image processing technique(2020-10-13); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Pressure measurement device via a wireless network for the seat cushion(2022-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An experimental study of natural lighting for energy conservation using top-up control method(2008-12-01); ; Tanachaikhan, LerdlekhaThis paper presents the experiment-based analysis of interior illuminance from natural lighting through clear glazed window of a reference room located in Bangkok, Thailand, during February to May 2007 as a case study. The point illuminances measured by photoconductive sensors were collected every 5 minutes and the average interior illuminance from natural lighting were then calculated instantaneously. In this study, natural lighting also aims to reduce the requirement of electric lighting during daytime (7 am-5 pm) of the reference room. If natural lighting alone cannot supply the light at the required value, the electric lighting is assumed to be switched on under top-up control method to maintain the standard illuminance level. The average interior illuminance, which comprises of natural light and electric light, is controlled to be stable at the IES standard level of 500 lux. Nine sets of high performance lamp, 56 lm/W of efficacy, are assumed to supply the light to meet the standard condition. The requirements of supplementary lighting and possible savings during the test months are finally estimated. © 2008 SICE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Declined angle analysis of shaft using magnetic field measurement(2009-12-01); ; Klongratog, PanuponThis paper presents the method to develop sensor for measuring shaft rotation and angular decline based on trigonometric and Pythagoras method. Magnetic flux density on the direction of constant magnetic field was measured using Helmholtz Coil as a magnetic field generator and using Hall Generator No. A1302 as a sensor. The resolution of shaft rotation was 1 degree per step and the range of shaft decline was varied from 4 to 10 degree away from the origin which was normal to ground level. Angle declining from the origin which is normal to magnetic field can be determined by measuring the relationships between Hall voltage and magnetic filed. If the shaft which was fixed on Hall Generator was rotated and not perpendicular to magnetic field, the Hall voltage was varied and the results was then transferred to computer to evaluate the angular decline of shaft. It can be indicated that the voltage varies sinusoidally while increasing the decline angle. Despite low costs of system, the method presented in this study was developed with consideration of effectiveness and reliability. Moreover, the method can be applied in machine alignment as well as in detection of building structure declination. © 2009 SICE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Applied to reuse steam condensate water in Medium petrochemical plant to boiler feed water(2022-01-01);