Chutchavong, Vanvisa
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Preferred name
Chutchavong, Vanvisa
Alternative Name
Chutchavong, V.
Main Affiliation
Email
vanvisa.ch@kmitl.ac.th
29 results
Now showing 1 - 10 of 29
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Item type:Publication, Sine-Squared pulse approximation using generalized bessel polynomials(2019-05-29); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Bernstein polynomial and rational Bézier curve for blood pressure simulation(2017-02-08); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Ultra-wideband slot antenna on flexible substrate for WLAN/WiMAX/UWB Applications(2014-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Implementation of ECG portable device for real-time signal monitoring(2017-11-24); ; ; Aoyama, H.In this paper presents a system for heart rate signal analysis in ECG (Electrocardiography) format using STM32f7 board. Electrode is used for recording the signal with stick on body in lead 2 orientations. Signal processing method are used upper average, slope and interval checking algorithm to process ECG signal in real-time. In experiment, to acquire a frequency of heart beat and display ECG signal and heart rate on STM32f7 board compare with wearable device that result have error rate less than 1%. This system is portable to use and sufficient battery for recording signal to analyze and monitor throughout the day. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Luminance-chrominance gain equalizer based on bernstein polynomials(2010-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, New crossover network based on q-bernstein polynomial(2016-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A triple-band high-gain planar dipole with double interdigital structure for indoor LTE and WLAN base stations(2019-02-01); Akkaraekthalin, PrayootThis paper presents a triple-band antenna using interdigital technique based on dipole structure at a frequency of 1.8 GHz. Using this technique, harmonic frequency bands can be generated as desired, resulting in the resonance frequencies of the second and third harmonics at 2.4 and 5.2 GHz, respectively. The proposed antenna consists of two square brass plates with an overall size of 63 × 64 mm<sup>2</sup>. The antenna bandwidths are found to be 410 MHz (1.59–2.00 GHz), 70 MHz (2.40–2.47 GHz), and 790 MHz (4.99–5.78 GHz), and the gains obtained are 9.63, 8.95, and 8.97 dB, respectively. The radiation patterns are directional at all frequency bands. Therefore, the proposed antenna can be appropriately used for indoor long-term evolution (LTE) and wireless local area network (WLAN) base stations. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A triple band antenna using dipole and interdigital structures(2018-06-01); Akkaraekthalin, PrayootThis paper proposes a triple band antenna using interdigital technique based on a planar dipole structure. The antenna has been designed at the fundamental frequency of 1.8 GHz. With this proposed technique, the harmonic frequency bands of 2.45 and 5.2 can be created. The designed antenna can support various applications including indoor LTE, WLAN and wireless sensor base station systems. The simulation results of the antenna show superior characteristics in form of return loss and radiation pattern. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of linear phase filter by using q-Bernstein polynomial(2018-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dynamic set point feedback control using steady state detection(2016-01-24); There are various of feedback control model such as PID, Fuzzy control. The purpose of feedback control model is to find best way to process output or feedback signal to be the input signal for control the system according to set point or input demand. Normally the set point has been given from outside of system or be fixed to constant it means there are other subsystem assign set point. The paper is research about how to change the set point using only feedback value for convenient purpose. We research about processing of feedback value to know when the system wants to change the set point. We designed algorithm to analyse feedback value about steady state for decide changing set point and implement this method in the real hardware by PID speed control using encoder and microcontroller for run our algorithm. At last we record statistic from microcontroller and analyses the result.