Embedded system for supply voltage converter of organic lightemitting diode with extended functionality

The work is dealing with the problem of developing an embedded system for supply voltage converter of Organic Light-Emitting Diode (OLED) with advanced built-in ability to measure the volt-ampere (I – V) characteristics of structures directly during their operation. This feature is crucial in the development of a new generation of intelligent OLED controllers, which in relation to known solutions, are characterized by reduced power consumption and increased speed of periodic or continuous measurement of the I – V characteristics of OLED structures. On the basis of such measurement the drift of characteristics of OLED structures in the course of their operation is carried out, and therefore, the possibility of operative correction of their power modes is provided. The measurement of I – V characteristics of OLED structures is performed on the transients of voltage generation in the boost circuits of the drivers. To meet the requirements for such measurements, the parameters of the transient pulses must meet certain criteria. The pulse amplitude should be sufficient to scan the I – V characteristics of OLED structures in the whole range of their possible operation, and the shape and rise time should be optimal from the point of view of further detection of these I – V patterns, in particular, regarding their drift in temperature modulation or OLED structure degradation. In a number of tasks scanning and measurement of I – V characteristics should be fast enough to prevent heating, but acceptable for high-precision analog-to-digital conversion. The parameters of the pulses provide the ability to measure the thermal parameters of thermal resistance and its dependence on the duration of heating. The controller is implemented on the basis of programmable systems on the chip, namely on the PSoC 5LP.

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Research of the Elevator Monitoring System Based on the Internet of Things

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.2380 ◽

2013 ◽

Vol 423-426 ◽

pp. 2380-2385 ◽

Cited By ~ 1

Author(s):

Shui Lin Tu ◽

Zheng Yang Wu ◽

Bin Qian

Keyword(s):

Internet Of Things ◽

Embedded System ◽

Monitoring System ◽

Information Acquisition ◽

Supply Voltage ◽

The Internet ◽

Power Supply Voltage ◽

Control Center ◽

The Internet Of Things ◽

Master Control

This paper discusses an elevator monitoring system based on embedded system and the internet of things. Through multi-sensor information acquisition, much information can be accessed to such as vibration, acceleration, speed, running noise,direction,floor station,door switch of the elevator car and power supply voltage,current, temperature of the traction machine,at the same time the noise and the temperature of the computer room with the information if there is anyone in the elevator, etc.. WinCE operating system is ported to the master control chip S3C2410 of ARM9 architecture,and a WAN connection between the elevator parameter monitoring terminals and the remote control center is established to realize the centralized monitoring and automatic remote failure alarm for the elevator operation. This system provides technical support for elevator safety regulation and the practical running results is satisfactory.

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Development of an Android Based SCADA System for Induction Motor Application

European Journal of Electrical Engineering and Computer Science ◽

10.24018/ejece.2019.3.4.102 ◽

2019 ◽

Vol 3 (4) ◽

Author(s):

Patrick O. Oseghale ◽

Nkwachukwu Chukwuchekwa

Keyword(s):

Embedded System ◽

Induction Motor ◽

Supply Voltage ◽

Assembly Language ◽

Mobile Station ◽

Base Station ◽

Motor Speed ◽

Scada System ◽

Station Site ◽

Design Construction

Majority of SCADA (Supervisory Control and Data Acquisition) systems that is being deployed and implemented all over the world utilizes a much larger network that is complex and expensive. This paper provides and demonstrates a cheaper alternative. The developed system which may be used for domestic applications has the ability to monitor the supply voltage, speed, casing and stator temperature as well as to control the speed of the motor. It can transmit the data of these monitored parameters, wirelessly, between the base station (site) and mobile station (android phone) through Bluetooth. The mobile station serves as the display medium to enable the user to view these parameters and also have input keypads that the user can use to alter the speed. To achieve this, an embedded system was used which involves the programming of PIC microcontrollers using assembly language. Other discrete components such as resistor, capacitor, transistors etc. were also utilized. A variable frequency driver was designed to drive the induction motor and interface with the microcontroller. After the design, construction and testing, the results were satisfactory as the SCADA system could alter induction motor speeds, collate motor casing and stator temperature, supply voltage and speed in revolutions per minute (RPM) and transmit them to the android phone. Temperature range of 24ºC to 51ºC, motor speed of 747 to 2234 RPM, and supply voltage of 179 to 221V AC was measured.

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An S-Band CMOS 6-Bit Vector-Sum Phase Shifter with Low RMS Phase Error Using Frequency-to-Voltage Converter Feedforward Loop

Journal of Circuits System and Computers ◽

10.1142/s021812662050036x ◽

2019 ◽

Vol 29 (03) ◽

pp. 2050036

Author(s):

Mostafa Nobakht Sarkezeh ◽

Aminghasem Safarian

Keyword(s):

Input Signal ◽

Phase Shifter ◽

Supply Voltage ◽

Phase Error ◽

Cmos Technology ◽

Voltage Converter ◽

Bit Vector ◽

Vector Sum ◽

Quadrature Generation ◽

Rms Amplitude

In this paper, a wideband full-360o phase shifter with 6 bits of accuracy has been designed and simulated with minimal root mean square (RMS) phase error. The proposed phase shifter deployed a feed forward path including a frequency-to-voltage converter (FVC) to minimize the mismatch in quadrature generation to eventually reduce the RMS phase error for S-band (2–4[Formula: see text]GHz) applications. The designed phase shifter in 180[Formula: see text]nm CMOS technology achieves an RMS phase error in the range of 0.607–1.18∘ with [Formula: see text][Formula: see text]dBm input signal over 2–4[Formula: see text]GHz frequency band. With lower input signal of [Formula: see text][Formula: see text]dBm, the RMS phase error is 0.621–1.34∘ for 2–4[Formula: see text]GHz input frequency. The proposed phase shifter shows an RMS amplitude error less than 0.41[Formula: see text]dB over 2–4[Formula: see text]GHz frequency. The 1-dB compression point ([Formula: see text]) of the proposed phase shifter is [Formula: see text][Formula: see text]dBm. The proposed wideband phase shifter draws 32 mA from 1.8 supply voltage. It occupies an active area of only 0.025[Formula: see text]mm2, due to active design without any inductor.

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Power Optimization for ASIC Design (Low power ASIC)

International Journal of Scientific Research in Science Engineering and Technology ◽

10.32628/ijsrset18413145 ◽

2014 ◽

pp. 258-265

Author(s):

Hitesh H Vandra

Keyword(s):

Power Systems ◽

Embedded System ◽

Low Power ◽

Integrated Circuit ◽

Supply Voltage ◽

Optimization Techniques ◽

Total Power ◽

Asic Design ◽

Switching Power ◽

Total Power Consumption

The modern era of embedded system design is geared toward the design of low-power systems. One way to reduce power in an application-specified integrated circuit (ASIC) implementation is to reduce feature size. Scaling of feature sizes in semiconductor technology has been responsible for increasingly higher computational capacity of silicon. However, questions regarding the limits of scaling have arisen in recent years due to the presence of leakage. As the supply voltage is lowered to satisfy the performance requirement, the threshold voltage has to be scaled, which increases leakage. More than 40% of the total power consumption is due to leakage of the transistor is in DSM. This leakage will increase with scaling become comparable with switching power. The goal of this paper is to analyse different low power circuits and optimization techniques to improve the power dissipation with the use of power gating components, retention registers, level shifters, isolation cells etc.

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On-chips MOS supply voltage converter

IEEE Transactions on Consumer Electronics ◽

10.1109/30.106911 ◽

1989 ◽

Vol 35 (4) ◽

pp. 872-875

Author(s):

K.T. Lau

Keyword(s):

Supply Voltage ◽

Voltage Converter

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Analysis of Characteristics of LED Lamps with T8 Bulb by Various Manufacturers

Light & Engineering ◽

10.33383/2018-112 ◽

2019 ◽

pp. 82-87

Author(s):

Nina P. Nestyorkina ◽

Olga Yu. Kovalenko ◽

Yulia A. Zhuravlyova

Keyword(s):

Supply Voltage ◽

Luminous Flux ◽

Supply Network ◽

Operational Characteristics ◽

Nominal Voltage ◽

Electric Parameters ◽

The Moment ◽

Colour Rendering

The article analyses the operational characteristics of 10W LED lamps with T8 bulb manufactured by ASD (Russia), Smartbuy (Taiwan), and VOLPE (PRC) and 18W FL with T8 bulb manufactured by PHILIPS (Poland) including the dependence of these lamps on the supply voltage. The results of measurements show that: a) the period of stabilisation of electric parameters and luminous flux of LED lamps does not cause discomfort of illumination unlike the said FL, the luminous flux of which at the moment of switching on is 70 % of the nominal value, which is reached after 13 minutes; b) with nominal voltage of supply network, the value of luminous flux of 10W ASD LED-T8R-STD LED lamp (Russia) is 6 % less than the declared one, and that of Smartbuy SBL-T8-10-64K-A (Taiwan) and VOLPE LED-T8-10W/DW/G13/FR/FIX/N (PRC) is even less; c) the general colour rendering index of all studied LED lamps is less than the declared one (72 instead of 80); d) the flicker index of all studied LED lamps does not exceed the declared value of 5 %; e) the characteristics of LED lamps almost do not depend on changes of the supply voltage within the range of ±10 %. The recommendations regarding the application of the studied LED lamps are given.

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Dependence of Current Harmonics of Greenhouse Irradiators on Supply Voltage

Light & Engineering ◽

10.33383/2019-024 ◽

2020 ◽

pp. 85-88 ◽

Cited By ~ 1

Author(s):

Nadezhda P. Kondratieva

Keyword(s):

Mathematical Models ◽

Supply Voltage ◽

Harmonic Distortion ◽

Feasibility Studies ◽

Power Losses ◽

Voltage Level ◽

Supply Networks ◽

Current Harmonics ◽

Cable Lines ◽

Harmonic Composition

The article describes the results of the study concerning the effect of the voltage level on current harmonic composition in greenhouses irradiators. It is found that its change affects the level of current harmonics of all types of the studied greenhouse irradiators. With decrease of nominal supply voltage by 10 %, the total harmonic distortion THDi decreases by 9 % for emitters equipped with high pressure sodium lamps (HPSL), by 10 % for emitters with electrode-less lamps and by 3 % for LED based emitters. With increase of nominal supply voltage by 10 %, THDi increases by 23 % for lighting devices equipped with HPSL, by 10 % for irradiators with electrode-less lamps and by 3 % for LED based emitters. Therefore, changes of supply voltage cause the least effect on the level of current harmonics of LED based emitters and then the emitters with electrode-less lamps. Change of the level of supply voltage causes the greatest effect on the level of current harmonics of HPSL based irradiators. Mathematical models of dependence of THDi on the level of supply voltage for greenhouse emitters equipped with LED, electrode-less lamps and HPSL lamps were formulated. These mathematical models may be used for calculations of total current when selecting transformers and supply cable lines for greenhouse lighting devices, for design of new or reconstruction of existing irradiation systems of greenhouse facilities, and for calculation of power losses in power supply networks of greenhouse facilities during feasibility studies for energy saving and energy efficiency increasing projects.

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