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Nov 26, 2018Open    AccessArticle

Experimental Investigation of Visualization and Package of Phase Change Material for Thermal Management of 18650 Lithium-Ion Battery

Qingyu Wu
The visualization of phase change process of phase change material (PCM) for thermal management of 18650 lithium-ion battery was studied by experimental method. The configuration consists of a semi-cylindrical battery allocated in the center of a semi-concentric housing made of aluminum, composite PCM and a transparent plate of 3 mm thick made of acrylics. The results show that the composite P

Sep 20, 2018Open    AccessArticle

Research on Point Charge Measurement Model of Electrostatic Sensor

J. W. Wang
In the mathematical model of electrostatic sensors established by Yan Yong in previous studies, the thickness of the insulating layer was not taken into account in the model. In order to study the static monitoring of electrostatic sensors in more depth, this paper considers the influence of insulation layer when establishing the mathematical model of the sensor. By establishing a mathematical

Sep 11, 2018Open    AccessArticle

The Design of Surface Acoustic Wave Receiving Circuit Based on Piezoelectric Transducer

Hao Jiang, Fuqiang Zhang, Zhao Guan
A type of Surface Acoustic Wave (SAW) receiving circuit with high stability is introduced in this paper on the basis of analyzing common surface acoustic wave receiving circuits. The circuit design is based on receiving transducer and the center frequency is 1 MHz. This circuit includes pre-amplification electric circuit with high input impedance, automatic gain amplifying circuit based on VCA810, tertiary amplifying circuit, filt

Jul 25, 2018Open    AccessArticle

Design of a High Frequency Driving Circuit of Surface Acoustic Wave Transducer

Guan Zhao
In this paper, a high frequency driving circuit of surface acoustic wave transducer has been designed to separate oil from oil/water mixed droplet. The transmission frequency of the surface acoustic wave transducer driving circuit can be up to 1 MHz. The transmit frequency of conventional ultrasonic driving circuit is mostly 40 kHz. However, the high transmit frequency driving circuit presents a good stability and accuracy. By est

May 23, 2018Open    AccessArticle

Optimization Comparison of Stand-Alone and Grid-Tied Solar PV Systems in Rwanda

Samuel Bimenyimana, Godwin Norense Osarumwense Asemota, Paula Jeanne Ihirwe
Solar power has gained great usage in electricity generation world-wide, and stand-alone is common in Rwanda. Site visits and energy audit estimates for a typical residential house in Rwamagana district, were used to cost effectively compare stand-alone and grid-tied PV systems able to supply 7.2 kWh/day, load. Algorithms design of lifetime costs and benefits were developed, to analyse total daily energy requirements using Frequen

Apr 28, 2018Open    AccessArticle

Direct Current Charger Hardware Platform Design

Yu Zhang
In order to reduce the pollution caused by fuel vehicles to the environment, electric vehicles are becoming the means of transportation. The replacement of fuel vehicles by electric vehicles is a future trend. Based on practical requirements, a 120 kW direct current charger has been designed. Taking the MK60DN512 as the core controller, a direct current charger control system is designed and implemented. The overall solution of th

Apr 19, 2018Open    AccessArticle

The Design and Realization of PKE System Based on ARM9

Tongfei Tu, Suyun Luo
In order to solve the problem that the PKE (passive keyless enter) with a fixed-frequency used in middle and low grade cars was interfered and broken easily, which led to the damage of anti-theft system and even the loss of cars, and in order to ensure the PKE can be used long and be expanded and upgraded in the future, a new, low power consumption and high reliability PKE was designed with the S3C2410 micr

Apr 12, 2018Open    AccessArticle

Automatic Irrigation System Using Android

Souvanxay Lorvanleuang, Yandong Zhao
Laos is an agricultural based country. As agriculture is the main source of food for any country, it is important to have a proper irrigation system. This paper shows a design of automatic irrigation system based on android application using Raspberry Pi microcontroller, soil moisture and temperature sensor to help a famer to control and monitor a farm. This work facilitates the farm irrigation by switching the pump motor ON/OFF t

Feb 13, 2018Open    AccessArticle

Using Three Op Amp Simple AM/FM Radio Circuit

Min Jiang
After nearly a year of probation, the type of AM radio repeater circuit in general can be retrieved in a number of local radio stations; the installation is convenient, the output has a loud voice, and bass is rich, which make it indeed a good choice for beginners’ homemade radio circuit. Beginners can give radio principle about double harvest theory and practice. The whole circuit fabrication costs low. The AM circuit is

Feb 09, 2018Open    AccessArticle

Design of Drive System for Sensorless Brushless DC Motor Based on Model Reference Adaptive Control and Its Application in Horizontal Well Tractor

Zhou He, Yongjun Chen, Bo Ruan, Shuhan Yu, Junwen Zhou
The actual working environment temperature of the horizontal well tractor is too high, which leads to position sensor of general brushless DC motor (BLDCM) cannot work normally. Therefore, the position sensorless drive system is designed to overcome the problems caused by the position sensor in the actual working conditions. The principle of sensorless BLDCM work is introduced in detail, And drive system of Sensorless B