Tammarugwattana, Narin

Preferred name

Alternative Name

Tammarugwattana, N.

Main Affiliation

School of Engineering

narin.ta@kmitl.ac.th

Now showing 1 - 10 of 20

Some of the metrics are blocked by your
consent settings
Application of the OpenCV-python for personal identifier statement
(2018-08-13)
Sriratana, Witsarut
;
Mukma, Suppakorn
;
Tammarugwattana, Narin
;
Sirisantisamrid, Kaset
Work 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 your
consent settings
Application of webcam for inspection of rice grain quality by using image processing technique
(2020-10-13)
Sriratana, Witsarut
;
Narknam, Namo
;
Apichitanon, Ruangsit
;
Tammarugwattana, Narin
This paper presents the image processing system for quality inspection of rice grains after sorting process by using an ordinary webcam to ensure that rice grains should meet the quality standards and impurity such as grits, dirt and stones should not be found [1]. Moreover, statistical information of rice grains from image processing could be taken into analysis to enhance the efficiency of the sorting process. Image data analysis of rice grains can be divided into 2 main arrangement conditions, non-overlapping and overlapping. In this study, the experiments to inspect rice grains were applied for 24 samples and 18 experimental designs including the complete and incomplete structures, the overlapping and non-overlapping arrangements, and the combination of rice grains from complete and incomplete structures in equal and unequal ratios. From experiments, it was found that the inspection of rice grain quality by using image processing technique and image data recorded by an ordinary webcam was reliable and efficient. The inspection errors under non-overlapping arrangement condition of complete and incomplete structures of rice grains were not observed. The inspection errors of rice grains combined from complete and incomplete structures in equal and unequal ratios were about 0.8% and 1.11%, respectively. However, under overlapping arrangement condition, it was observed that the inspection errors of image processing would be high by up to 53.82% on average.
Some of the metrics are blocked by your
consent settings
An experimental study of natural lighting for energy conservation using top-up control method
(2008-12-01)
Wangkadilok, Chaichana
;
Sriratana, Witsarut
;
Tammarugwattana, Narin
;
Tanachaikhan, Lerdlekha
This 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 your
consent settings
LQR/PID controller design of PLC-based inverted pendulum
(2018-01-01)
Sirisantisamrid, Kaset
;
Wongvanich, Napasool
;
Gulpanich, Suphan
;
Tammarugwattana, Narin
This paper presents an LQR based PID controller to control the inverted pendulum system. The control design employs a control zoning approach whereby the entire pendulum system is divided into two regions: a normal pendulum region and the inverted pendulum region where the system is approximately linear close to the upright position. The LQR architecture is used to obtain optimal gains for the PID controller. An algebraic approach is also presented for selection of Q and R matrices. Experimental implementations with a PLC based system show that the computed gains yield the most stable controlled responses compared to the gains chosen through trial and errors.
Some of the metrics are blocked by your
consent settings
Enhancement of sensing characteristics of Polydimethylsiloxane-based capacitive force sensor by introducing conductive polymer to dielectric layer
(2021-01-01)
Siangkhio, Yasumin
;
Rangkasikorn, Adirek
;
Tammarugwattana, Narin
;
Kayunkid, Navaphun
;
Jessadaluk, Sukittaya
A capacitive force sensor is one of the electronics components used in several electronic devices and applications. An improvement of sensing characteristics of the sensor, for example sensitivity and response time, becomes an interesting research topic. The alternative approach to enhance the sensitivity and response time of polydimethylsiloxane-based capacitive force sensors is proposed by introducing poly(3,4-ethylenedioxythiophene) polystyrene sulphonate, a conductive polymer, into polydimethylsiloxane active layer. Two sensors using different active layers, (i) polydimethylsiloxane (conventional sensor) and (ii) poly(3,4-ethylenedioxythiophene) polystyrene sulphonate mixed polydimethylsiloxane (modified sensor), were fabricated and characterised to reveal the sensing enhancement. Interestingly, the modified sensor shows the significant increase in the sensitivity from 0.7 to 1.14 kPa<sup>–1</sup> (+62.86%) and the shortening response time from 1.55 to 0.43 s (−72.26%) with respect to the conventional sensor. In addition, the deterioration in elastic behaviour and the faster charge–discharge behaviour observed from the poly(3,4-ethylenedioxythiophene) polystyrene sulphonate mixed polydimethylsiloxane film indicate the better deformation and charge transport than that from polydimethylsiloxane film. Therefore, it can be concluded that the conductive poly(3,4-ethylenedioxythiophene) polystyrene sulfonate additive plays the role of mechanical and electrical modification of the polydimethylsiloxane active layer leading to the enhancement in sensitivity and response time of the polydimethylsiloxane-based capacitive force sensor.
2
Some of the metrics are blocked by your
consent settings
Real-Time Monitoring of Hydraulic Oil Deterioration Using a Hall Effect Sensor Under Operational Conditions
(2025-01-01)
Sriratana, Witsarut
;
Chartpolrak, Pijaya
;
Tammarugwattana, Narin
This paper presents a method for measuring hydraulic oil degradation by detecting metal particle flow using a permanent magnet's magnetic field and monitoring voltage changes in a Hall effect sensor (HES). Degraded hydraulic oil containing increased metal contaminants from component wear exhibits reduced viscosity and higher flow rates. We developed a measurement device incorporating a microcontroller to process data and display contamination levels on an organic light-emitting diode (OLED) screen, enabling real-time monitoring without interrupting machine operations. Experiments measured voltage variations at three system locations with metal contamination levels from 2.5 to 5.0 grams per liter (in 0.5 grams per liter increments). Results showed the HES output voltage varied linearly with particle concentration, demonstrating a maximum deviation of 4.73 millivolts (0.47 %) at 2.5 grams per liter, particularly at the reservoir outlet. This approach helps assess hydraulic oil contamination under operational conditions, offering advantages in real-time monitoring capability, cost-effectiveness, and non-invasive implementation.
2
Some of the metrics are blocked by your
consent settings
Pressure measurement device via a wireless network for the seat cushion
(2022-01-01)
Tammaruckwattana, S.
;
Hewchaiyapum, C.
;
Seangsuwan, N.
;
Techahongsa, P.
;
Tammarugwattana, N.
This paper presents wireless pressure measuring devices for the seat cushion consisting of an air cushion which reduces the chances of developing a pressure ulcer. A force sensor resistor (FSR sensor) is placed in the position where pressure is most likely to occur. FSR sensor is put under air cushions to help distribute the pressure and reduce the damage which may happen to the sensor. The pressure is applied to the sensors, they will send the data to the microcontroller (Arduino MEGA 2560) and then transmit data via Bluetooth to LabVIEW for display on the monitor screen with the measured pressure range which is divided into different colors. If the pressure is continuously applied for a period of 30 minutes, there will be a notification via the LED light to allow the user to change their sitting positions to reduce the likelihood of pressure ulcers.
4
Some of the metrics are blocked by your
consent settings
Application of image processing for inspection of pill production process
(2018-08-13)
Sriratana, Witsarut
;
Apichitanon, Ruangsit
;
Tammarugwattana, Narin
;
Weerathaweemas, Songchai
Inspection of the external appearance of the pill is one of the methods to check the basic quality according to the standard of Food and Drug Administration (FDA) such as chipped pills, inappropriate sizes, and unclear letter printed on pills. This paper proposes an application of image processing for inspection of pill production process. In this study, the Image Processing principal including the Grayscale Method, Threshold Method, OTSU Method, Bounding Box Method and Geometric Algorithm was adopted to process images from normal webcam camera. In addition, the Microsoft Visual C# 2008 was used for processing the signals by analyzing the output signals of webcam camera. In the experiment, the perfect pill was determined by a cross-sectional area not less than 98% of the standard pill in units of milligrams (mg) in FDA standard. The experiment was divided into three cases: Inspection 100 perfect pills, 100 imperfect pills and 100 pills in 1:1 ratio between the perfect pills and the imperfect pills with the speed for inspecting and distinguishing of 70 pills per minute. From the experimental result of three cases, the error rates were 0.6%, 1.2% and 1.0%, respectively, while the average of process error was 0.93%.
5
Some of the metrics are blocked by your
consent settings
Applied to reuse steam condensate water in Medium petrochemical plant to boiler feed water
(2022-01-01)
Tammaruckwattana, S.
;
Seekhieo, A.
;
Tammarugwattana, N.
In Thailand's petrochemical industrial estate which has a small or medium-size plant, boiler feed water is bought from the external boiler feed water provider to use in an incinerator to make steam for plant use, and the steam condensate water that comes after the incinerator process is sold back to the provider as well. The cost gap between bought water and sold water is considered a waste since the income gained from selling post-boiled water is less than expenses from bought water. In this paper, the research to improve the steam condensate water quality and reuse the water has been proposed. This application is to be considered to build the steam condensate treatment unit for treating water potential to reduce the overall operation cost (OPEX). The online analyzer is being used to control the chemical dosing package via a plant control system to check the quality of water and treat it in real-time so the water can be reused.
3
Some of the metrics are blocked by your
consent settings
Error analysis of temperature measurement system: A case of PT100
(2009-01-01)
Tanachaikhan, Lerdlekha
;
Tammarugwattana, Narin
;
Sriratana, Witsarut
;
Seangratipen, Tawatchai
This 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.
2

Tammarugwattana, Narin

Filters

Settings

Sort By

Results per page