Cheypoca, Thepjit
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Item type:Publication, A simple CMOS-based algorithmic ADC(2007-12-01); ; This paper presents a one-bit cell of reverse Gray-code algorithmic analog-to-digital converter. The proposed converter comprises of full-wave rectifier, current mirrors, and current comparator. The realization method is simple, small in size, and suitable for integrated circuit form. The design strategy is based on the MOS biased at the edge of conduction to provide a low accumulated error and a low distortion in the transfer characteristic. An N-bit resolution can be achieved by cascading of the N proposed one-bit cells. PSPICE simulation results supporting the characteristics of proposed circuit are agreed with the expected values. © ICROS. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, OTA-based capacitance-to-period converter for capacitive sensors(2013-03-28); ; A simple design technique for realization of a capacitance-to-period converter based on operational transconductance amplifiers (OTAs) is presented in this paper. The proposed principle utilizes the behavior of astable multivibrator. The configuration of converter is implemented using commercial available and low cost devices. The obtained time period is proportional to sensing capacitance. The conversion gain of proposed scheme can be changed by electronic means. Circuit performances verified by experimental results are agreed with the expected values. © 2013 ICIC International. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, System development for tube inspection based on eddy current technique(2012-01-01); ; Kaewpoonsuk, AnuchaThis paper presents system development for tube inspection based on eddy current. The proposed system consists of sine wave generator circuit, amplifier circuit I, voltage control current source, filter circuit, detector circuit I, detector circuit II, amplifier circuit II, comparator circuit, display circuit and eddy current probe. The system is based on eddy current inspection technique. The eddy current between eddy current probe and metal tube was measured by the proposed circuit. The measured output voltage is applied to the signal processing circuit for display unit. When the investigated metal tube has no defect, green LED is turn on, otherwise the red LED with buzzer is turn on. © 2012 SICE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Using an android devices as mobile extensible HMIs(2020-07-01); Anuntahirunrat, KongsukIn this paper, an android application monitoring and control with programmable logic controller (PLC) system is proposed, which helps the production engineer self-correct the system without restriction of time and place. The proposed android application consists of smart phone, access point and PLC Siemens S7-1200. The feasibility of this method is illustrated by experimental using different parameter databases. Recognition results show this approach is efficient. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, 4-20mA current transceiver(2010-12-01); ; A method for realization of current transceiver is proposed in this paper. The proposed current transceiver can simultaneously transmit and receive the industrial standard current signal 4-20mA. Only one transmission loop or one pair of wire is required for current signal transmission and receive between two stations. The input and output signals are in the voltage form that is suitable and convenient for industrial applications. Realization of the proposed transceiver is based on the use of voltage-to-current converter to transmit and receive a current signal. Simulation results demonstrating the performance of the proposed scheme are agreed with the expected values. The leakage signal between input and output of transceiver in term of crosstalk is about -66.8dB. ©ICROS. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, System development for orange surface defect detection using image processing(2015-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, High performance periodical paths tracking of two-dimensional handheld micromanipulator using explicit model predictive control(2017-02-18); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Using a Smartphone to Assist in Physical Therapy(2021-04-01); Anuntahirunrat, KongsakIn this paper, the use of accelerometer, gyroscope, magnetometer and GPS. A basic sensors available on smartphones, in the treatment of paresis symptoms, patients as a way of encouraging physical therapy on their own without having to travel to the hospital. And it is a burden to doctors and physiotherapists, making it possible to serve a large number of patients will explored. It also provides therapeutic information to improve individual physical activity. A smartphone that attached to the patient at a given location.It sends values from sensors to databases in the cloud. The data provided by the database will analyze and diagnosed by doctors and physiotherapists.3 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, OTA-based electronically variable floating inductance simulator(2011-12-01); ; A circuit technique to implement a floating inductance simulator using operational transconductance amplifiers (OTAs) is introduced in this paper. The realization method based on the commercially available OTA, one resistor and one capacitor provides the advantage of an electronic adjusting capability. The resulting inductance can be electronically varied by tuning the external bias current of OTA. The obtained simulator is also applied in system response compensation. Experimental results verifying the circuit performances are included. © 2011 ICROS.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Evaluation of explicit model predictive temperature control for on-off air conditioner(2017-12-13)1