This paper proposes a microprocessor-based control of high-power secondary HID electronic ballast design. Electronic ballasts using active power factor correction, micro processor MCU as a full bridge converter, at the same time has the function of "watchdog", working temperature monitoring function...

During the measurement procedure of line structured light 3D scanning system, there is a key about how to calibrate the whole measuring system. In order to solve the calibration problem in the line structured light 3D measured system such as requirements for high accuracy calibration models, complicate...

The paper presents a design of solar street lamp system based on the maximum power point tracking and energy output coordination strategy. It uses chip CC2530F256 which carries with the ADC sampling output voltage and current of the solar cell to adjust the PWM duty cycle and achieve maximum power point...

The laser marking intaglio plates were printed in intaglio proofing machine. Three halftoning algorithms for multi-grey image were proposed. The printing and scanning proofs were compared with the simulation images of digital halftoning after scanning the proofs. The quality of images was evaluated by...

Modulus of elasticity is an important mechanical parameter that characterizes elastic property of materials. In the process of engineering mechanic learning, modulus of elasticity of materials is mainly measured by electrical measurement method. But electrical measurement method requires students being...

Boxcar integrator and lock-in amplifier for the detecting of optical small signals are developed based on the virtual instrument technology of LabView. The algorithm of boxcar integrator is simple and easy-achieved. Lock-in amplifier is a powerful technique for the extracting and amplification of small...

Through the old intercom system for stage could fulfill all types of work in performances, but could not escape the limitations of traditional techniques for the reason the core of this whole system is still based on circuit-switched technology. Networked intercom system for stage dispatch is proposed...

There are many types of fire extinguishers, cylinder size is larger, the paper introduces a kind of using frequency converter and PLC control can achieve the fire extinguisher of longitudinaland girth welding device and its working principle of the hardware and software design, At the same time put forward...

Artificial neural network(ANN) has very strong robustness and fault tolerance, computing speed is fast, has the self-organizing, self-learning and adaptive ability, and can be fully approximation to arbitrary complex nonlinear relationship, so has been widely used in wind power prediction. This document...

Engine overheating is a common fault of wheeled armored vehicles, and the cause of overheating is very more. In this paper, the author through their own professional knowledge and experience, finding out the reason of several engine overheating, and summarizes several useful overheating fault diagnosis...

Ocean space tracking ship will produce dynamic elastic deformation due to many factors such as solar radiation, mechanical vibration, shock waves and so on, which can affect the measurement accuracy of shipboard mesurement equipments. So investigating the slight angle measurement system of shipboard...

In the Smart Grid environment, power quality monitoring system is required to achieve wide-area, panoramic, massive, real-time, accurate and reliable data monitoring, which is a challenge to the traditional storage model and management of power quality monitoring system. "Cloud Computing" technology-based...

For the detection and location of power quality disturbance signal problem, a disturbance localization algorithm is proposed based on the mean sum of the square of S-transform amplitude, with this method the time of occurrence and duration of the disturbance signal is simulated. Simulation results show...

In considering the effect of three-phase unbalance degree upon the low voltage line loss, the dynamic three-phase unbalance coefficient is adopted to improve the computation method for low-voltage line loss based on equal electric resistance method in this paper.With an aim at the most of low-voltage...

A kind of microgrid energy monitoring system based on Energy Management System (EMS) is researched in this paper. A professional compound energy power station integrated automation remote monitoring system for multi-energy complementary microgrid system is developed. Control board of energy management...

In order to solve the problem that the traditional fault diagnosis for the transmission system of self-propelled guns cannot access accurate fault locating due to the lack of effective methods [1], a program for calculating the characteristic frequency of the transmission system was developed. In this...

Through in-depth analysis of the second harmonic nonlinear conversion efficiency, using periodically poled crystal MgO:sPPLT as the research object, combining the Sellmeier equation and the polar period with temperature thermal expansion relationship, the best matching temperature is obtained when the...

Polarization state generator is an indispensable part of polarization imaging system, produces the state of polarization for the calibration or test . Based on the analysis of the existing scheme, a novel Polarization State Generator is developed , which is constituted of a linear polarizer P and two...

In response to the growing requirements of on-site calibration test of transformers in power system, a mobile testing laboratory for current transformer was designed, based on the comparative measurement stipulated by the national verification procedures. Mounted in the industrial container, the mobile...

Considering the voltage problems of district power network with large-scale new energy, the reactive power optimization model is discussed in this paper, and the renewable power plants are taken as continuous reactive power adjustment means to participate in the optimization. From two time scales of...

Drilling industry operates under low-voltage power network, causes large number of reactive power loss, and seriously affects the power system voltage stability. This paper introduces the application of Static Var Generator (SVG) reactive power compensation in the low-voltage drilling power network using...

Rational peak-valley TOU price can change consumer power consumption mode effectively and assure reliable and high efficient operation of power system. Large-scale promotion of distributed generation will have a direct impact on the distribution network and the demand-side response will be faced with...

As the important executive body of flight control system, the servo aims to drive the control surface deflection according to the position command. This paper makes a hardware design for a digital electric-mechanical servo controller for valve adjustment. Three-phase brushless DC motor(BLDCM) acts as...

Transmission lines ice cover is a kind of serious natural disasters, is one of the major problems to endanger the safety of transmission lines running.Communication often short-circuit current melting ice is melting ice the problem of insufficient power supply capacity is much, and dc melting technology...

As the global energy problem becomes more and more severe, the ultra-high voltage (UHV) AC transmission technology will get a large number of applications. The UHV transformer, as one of the important equipments of the transmission system, its quality and reliability is directly related to the safe and...

In this paper, we have analyzed and described dark-Gaussian soliton collision behaviors within a modified add/drop multiplexer system consisting of one center ring and one smaller ring on the left side. Optical communication system based on dispersion compensation fiber and nonlinear optical effect is...

This paper is briefly discussed the theory of Sigma-Delta modulator, analyzed the performance of L-order single bit Sigma-Delta modulator. A system modeling for 2nd order Sigma-Delta modulator is simulated. Under laboratory conditions, An acoustic amplifier with Sigma-Delta modulation and PWM modulation...

Power line communication (PLC) has shown great advantages in the smart grid, broadband access, intelligent home and four nets fusion fields.But its bad channel environment especially the noise interference problem is so serious that has become a bottleneck restricting of the development.In this paper,we...

After ending the Radar Antenna modification on the airborne plane, the initial installation error is need to be measured and to be compensated with the initial error. For the attitude measuring requirements of airborne radar Antenna mounted, This paper studies a non-contact optical measuring method based...

CSMA-CA back-off algorithm is the most important link for wireless sensor network(WSN) MAC protocol, distributes the limited wireless communication resource among all WSNs, is the key to ensure the efficient communication for WSN. ADF7025 is a single chip wireless transceiver with a low rate, low power...

Wireless sensor networks(WSNs) can real-time collect information and monitor the objects located regional distribution network, has a broad application prospect. Research on efficient routing algorithm becomes the core problem to improve the communication connectivity, reduce transmission delay, prolong...

A novel calibration method is proposed to measure object plane tilt angle in microscope system with small-depth-field. The proposed method is constructed by a space model about calibration board and the surface of image. Only a otating disk, a goniometer and a calibration board with some features are...

This paper introduced a method of designing radar control unit detection and maintenance platform based on PC104,and focused on expounding design of hardware and software of the platform. The platform uses a high-performance PC104 embedded computer as the control core. Realizing state control and detection...

Photovoltaic (PV) has the advantage of safe, reliable, clean, easy maintenance and so on. This paper analyzes the natural conditions of solar energy resources in Qingdao .The local application situation and development trend of PV are also discussed. At the same time, in order to meet the needs of operation...

Wind energy can be converted to electric energy by wind power generation, which is the world's fastest growing renewable green energy. In this paper, in view of the current construction of wind power generation in Inner Mongolia, we study the technical status and development tendency of wind power. In...

In the lightning monitoring systems, positioning calculation is directly related to the results of the detection accuracy. In this paper, the concept of the particle swarm optimization (PSO) algorithm for lightning location estimation was brought in. The PSO overcome the disadvantages of iterative method,...

Partial discharge (PD) signals is one of the key means to judge the transformer fault, how to effectively remove interference of PD in the field is the key in PD monitoring. Based on the Hilbert transform, this paper proposes a new algorithm of signal decomposition of Variational Mode Decomposition (VMD)...

Identifying the lightning and short-circuit fault of transmission lines correctly is important for the transient protection. To address the problem, this paper adopts a multi-resolution analysis of wavelet packet and finds that energy distribution of additional components of the transient currents differs...

The interaction of two in-phase and out-phase anomalous hollow Gaussian beams in strongly nonlocal nonlinear media (SNNM) is investigated. The analytical expression describing the two beams co-propagating in SNNM is derived. It is found that when two anomalous hollow Gaussian beams separated by a distance...

Aiming at the low efficiency problem of the existing ray tracing algorithm, we design a low-complexity ray tracing algorithm based on the virtual source. In order to reduce the computational complexity, we design a concept-"virtual wall" to reduce the number of walls to be searched. Meanwhile, the depth-first-search...

TimeSynchronization is one of the most important support Technology in WSN,plays an irreplaceable role in the developmet of WSN.For this reason,an improved algorithm based on theRBS algorithm is proposed combination of some classic time synchronization algorithm.Referring to the idea of cluster-based,...

The full name of CDC is Continuous Damping Control, CDC damper is an important part of the Semi-active suspension system, and its damping force is controlled by a solenoid valve. We put the CDC damper as the research object according to its structure and working principle to establish the corresponding...

Mobile radio channel models are essential for the development, evaluation and test of current mobile radio communication systems and also crucial for the realization of the future systems. Nakagami-m distribution is important for channel modeling in mobile communication. It provides accurate characterization...

According to the wavelet-neural network algorithm of relay protection device has the characteristics of requirement of high sampling frequency and large amount of data calculation, we use FPGA to realize the algorithm in hardware. A system model is built and converted into VHDL code through the system-level...

This document explains and demonstrates how to prepare your camera-ready manuscript for Trans Tech Publications. Digital communication is a very important technology in modern multimedia technology, it makes up the defect analog communication many, many, but in digital communication, signal attenuation...

In order to make use of Distributed Generation(DG) flexibly, the novel Integration Micro-grid System(IMGS) based on DC bus is proposed in this paper. The changing rule of photovoltaic array in a day is studied deeply. The control strategies based on droop characteristic are adopted by grid-connected...

The paper presents a new control method based on voltage space-vector pulse width modulation, which designed by aiming at the defects in traditional control methods of single-phase inverter power. The system models are obtained by using simulation software Simulink of Matlab. The results are achieved...

By analyzing relative literatures and building a simulation model, this paper finishes the analyzing of fault waveforms and studies fault characteristics from the perspective of signal synthesis.With one-to–many SVM, the image extract features and features is identified to training Sample and recognizing...

An improved controller design method for an inverter operating with extra functions to suppress current harmonics or voltage harmonics is proposed. When at least two of this-type inverters are operating in a micro-grid, they can collaboratively bear current harmonics and voltage harmonics suppression...

Earth capacitance of system line can be matched with inductance parameters of electromagnetic voltage transformer (PT), thereby leading to ferromagnetic resonance in the power system under the condition of instantaneous single-phase grounding and other fault types. Application scope limitations and deficiencies...

Aiming at the problem of voltage reduction and voltage distortion due to the extensive use of inductive loads, and some shortcomings of existing reactive power compensation devices, a new AC-AC chopper based var compensator is proposed. The basic principles, compensation characteristics and topology...

Sunlight is one of useful energy harvesting sources that can be found everywhere. In spite of this ubiquitous availability, sunlight intensity is dynamically changing. Thus Maximum Power Point Tracking (MPPT) circuits are needed to harvest the maximum available energy from the solar cell, regardless...

Improvement of power factor can reduce resistive power losses, increase the bus voltage and in many cases improve motor performance in an industrial enterprise power network. The regulating elements implemented in the network include transformer tap changers, generators regulators, static shunt capacitors....

To improve the overhead transmission line online monitoring device power utilization rate, the online monitoring device is not always collecting data, according to the different operational characteristics of the device units, proposed a comprehensive efficient energy-saving control scheme. Scheme given...

With the development trend and rapid increase of the power grid capacity, short-circuit current level is increasing rapidly. How to make sure the steady and reliable operation of the power system is a big challenge. So it is of great importance to limit the short-circuit current effectively. A new kind...

According to the problem that the single phase grounding fault location is difficult to detect, a novel method of identifying fault line for single phase grounding fault is presented, based on the detailed analysis of the transient zero sequence network’s fault characteristics in the small current neutral...

In order to implement the optimal utilization of energy and stable running of system in the stand-alone PV generation system of microgrid,the control mode of DC-DC converter has to switch frequently between MPPT control and constant voltage control.And the two modes have its own control strategy and...

Li-air battery is considered as a promising alternative in the future to replace the current battery technologies. It can eliminate the common range anxiety in electric vehicles for its compelling high energy density. However the extremely low power density becomes its deadly drawback which makes it...

This paper introduced a kind of digital signal processor (DSP) control system of several ( 2) dc motors, and described the development of dc motor control interface using C# language based on Visual Studio 2010 (VS2010) software platform. The mechanism of serial communication as well as its control on...

Because the number of electric industry end-users is tremendous and spot environment is complex, traditional meter reading pattern can’t satisfy. In this paper, multicast routing algorithm based on IPv6 wireless communication module and RPL routing protocol is proposed. It is used to construct network...

The suspended particulate matters are one source of the main pollutants in poultry housing and corral. There are also lots of serious pathogens in the air as suspended particles. It is harmful to the health of animals and workers when the density of suspended particulate matter is high. It is significant...

Commercial thermal infrared imager with large volume and high cost usually captured the infrared thermal image with automatic gain in order to enhance contrast of the image. The infrared thermal image captured with automatic gain could not represent the original image information corresponding to the...

To solve the problem of energy waste caused by fixed luminance of common lamps, a new fluorescent lamp system is designed which is based on STC SCM. In this system, Light gathering is used to collect and analyzes the light luminance outside by STC; the circuit composed by the PWM is controlled the fluorescent...

The push-pull power boost and full-bridge inverter levels change in the control circuit, the first-stage booster circuit using SG3525 chip push-pull control, closed loop feedback; inverter part EG8010 complete SPWM modulation driver chip IR2110 be full-bridge inverter; after level output is sampled using...

The lightning produces a powerful lightning current, and it caused the electromagnetic fields, the optical radiation, the shock wave and the thunder and so on physical effects. Electromagnetic fields generated by lightning are divided into horizontal electric field and vertical electric field. The accurate...

Lightning, not only on the ground of buildings and electronic equipments but also for the aerospace, defense and military fields, equipment, facilities, has a great threat. In view of this situation, the deduced lightning electromagnetic field calculated expressions at any point in space is of great...

In this paper, we investigate the problem of reliability of RPL (IPv6 Routing Protocol for Low power and Lossy Networks) when applied to route traffic in Wireless Sensor Networks (WSNs). RPL is a routing protocol adapted for information routing with low power, low storage and processing sensor devices....

The system uses STC12C5A60S2 microcontroller as control core of the system, the use of special ADE7763 energy metering IC to collect data to construct a developed a high precision, small water treatment equipment data acquisition.Collect real-time data storage and transmission timing via GSM network...

Articles on energy metering performed via remote communications platform to explore new technologies and designed measurement system software, hardware and implementation methods.Energy metering system design includes selection of components, hardware design and software programming and debugging.This...

Designed one kind to support the type capture organization in view of non-cooperation goal satellite in, the use capture organization locking goal satellite to the docking ring, could realize smoothly to the goal satellite fast capture, and reduced time the capture organization and the goal satellite...

With the development of industrial control technology, the drawbacks of traditional PLC gradually emerged. Although most of the PLC manufacturers have similar programming language, the PLC hardware and software products are not compatible. Also, their configuration, addressing and grammatical structure...

The collection of target-radiated noise for passive sonar can be effected by broadband strong jammers, the detection range and accuracy will be reduced as a result of the appearance of jammer suppression area. In this paper, with the help of sonar equation and the theories of broadband array signal processing,...

This article proposes a method to solve route plan problem of unmanned underwater vehicle (UUV) using particle swarm optimization (PSO). Firstly, traditional electronic nautical map is preprocessed to decrease calculated amount in computation of route cost and improve plan instantaneity using technique...

A target simulator based on ADSP-TS201 was designed and implemented for researching and testing torpedo homing system. A multi-DSP parallel processing system was used as the hardware platform to generate element signals in real-time, and then the signals were provided for the torpedo homing system. In...

This paper presents that the reflection signal from a submarine can be seen as the sum of a few strong highlights and a large of weak random highlights background. Using interpolation method can create every hydrophone’s signal in a plot array from a single hydrophone’s output. At last the time domain...

In this paper, we studied the time-frequency domain characters of divers in lake trail and proposed some experimental results. The diver we invited in the trail was equipped with open-circuit SCUBA. We recorded the breathing sound of the diver in different motion state and analyzed its characters both...

Object extracting and optical measurement of the image is researched by using the Photoshop channel module as the operating platform, and a simple and practical processing method of optical measurement image was proposed. Hereby, the optical measurement image process and the relationship between channels...

In the practical application, the SINS/GPS tightly integrated navigation system is faced with the situation that state error model is inaccurate or noise statistical characteristics are inconsistent with the reality. However, traditional Extended Kalman Filter (EKF) method can not effectively solve it,...

Switching power supply is on the basis of the development of modern electronic science and technology, using the power switch tube, by controlling the switching time (duty cycle) to make the output voltage stability of the high frequency power supply, it includes two parts of the main circuit and PWM...

This paper presents an approach to a novel and efficient diagnostic system for PLC controlled manufacturing systems. A general structure of the diagnostic system is implemented, which is the extension of an existing diagnostic system we have developed in recent years. We artificially get the diagnostic...

Along with the development of high frequency switching power supply technology, people on the electromagnetic compatibility, noise pollution more and more seriously, the anti EMI technology has become a new technology and new industry, solves the problems of electromagnetic compatibility of electronic...

In this paper, we finalize the research on the applications of wireless techniques for electrical monitoring and control systems. Monitoring system plays an important role in our daily life. Load frequency control method is widely used in the network can be complex, distributed generation in a large...

With the development of manufacturing techniques and hardware devices, the need for high-speed chips is bursting. As a review report, we analyze the fundamentals and latest progress of modeling, analysis, and design technologies for signal integrity and electromagnetic compatibility on PCB and package...

Through folding screen of dendritic discharge in Fushun Power Supply Company 220kV Gongnong Station, this paper folding screen in the basic process of dendritic discharge fault, argument insulation be affected with damp be affected with damp and gas are the main external cause the folding screen dendritic...

Pointed out that the lead wire resistance difference quality lead wire connection is not tight tap switch bad contact tap switch finger refers to a shift of the position pointer and winding broken strands is caused by the main reason of DC resistance unbalance rate exceed in transformer, and combined...

This paper based on the 220kV ACCC wire part of Liao Yuan line composite insulator for insulating properties, mechanical properties and material performance testing, a comprehensive assessment of the effect of high temperature on the properties, define physical stability and reliability, composite insulator...

This paper describes the development of a new transmission line live working foreign body removal, a tool developed by a lightweight safe, efficient, timely treatment and threats to the safe operation of overhead transmission lines foreign body proved to avoid the strong electric field of charged workers...

Together export transformer short-circuit accident analysis for a 66kV substation, analyze a variety of test methods 66kV transformer winding deformation, and the advantages and disadvantages of these test methods are discussed in detail, based on capacitance changes proposed transformer winding and...

Through the analysis of lightning to the harmfulness of the power transmission line, puts forward the specific measures to prevent lightning accidents, improving insulation, installing controllable discharge lightning rod, reducing the tower grounding resistance, adding coupling ground wire and the proper...

In order to solve the existing high voltage switch gear when the voltage difference method using core phase, due to the different switch gear supporting capacitive sensor indicators are inconsistent, resulting in phase sequence check misjudgment and other issues, this paper uses the phase difference...

At the main transformer for Helping on the 1st pre-test and found that the 1st variant of 66kV side of the A-phase winding DC resistance is too large, and the phase imbalance difference of 7.21%. On all aspects of the test wiring, testing and other parts were examined and treated, the test data did not...

Electric power industry standard DL/T911 2004 Frequency Response Analysis Method of Power Transformer Winding Deformation, it is definition of winding deformation Under the action of mechanical force or electric force, the power transformer windings axial or radial size changes, usually it characterized...

Through several examples, describes the harmonic distribution network and its equipment hazards. Harmonics can cause distribution transformers demonstration power loss and additional loss increases, resulting in reduced aging transformer oil and insulation properties, triggering a distribution transformer...

Transformer DC resistance test is one of the routine test in the transformer core project, but the test efficiency is generally low.The paper ,through the analysis of transient process of large DC resistance measurement of transformer coil, core hysteresis phenomenon and the influence of residual magnetism...

This article illustrates the characteristics and proportion of GIS system failure through the introduction to GIS system structure and characteristics; In order to make the GIS in the safe operation of the power system, It is necessary to test AC withstand voltage at the scene.

Isolation switch of the high voltage alternating current usually emerge some faults, as the suffered losses of electrical power system is increasing, people will begin to pay attention to the fault problems of isolation switch. Through knowing the basic performance of isolation switch, people give some...

Hybrid electric vehicle is the car which increase a electric drive system on the traditional internal combustion engine vehicle. The coordination work based on the drive motor and the internal combustion engine can reduce fuel consumption and CO2 emission. Considering on the special characteristics and...

This paper reports on dynamic characteristics of a cable-towed acoustic array system during ship’s loop turning maneuvers with a lumped parameter model. The transient behavior of the towed sonar array given rise to the tow-ship’s loop maneuvers with different towing speeds, tuning radii, and current...

According to the difficult in selecting parameter of SVM when modeling on the gas quantitative analysis,and existing methods need long time,SVM optimized by improved grid search method was proposed to built an infrared spectrum quantitative analysis of gas.According to this method,the spectrum data of...

Stochastic resonance(SR) is one of the applications in weak signal detection. Many researchers used the combination of the traditional first-order bistable system and genetic algorithm(GA), but the output of first-order bistable system is not smoothly enough, genetic algorithm has the phenomenon of losting...

To achieve the functions of alarm direct pass and remote browsing National Electric Power Dispatching Center put forward, each substation monitoring manufacturers commonly adopted the way based on their own workstations currently, which exists some problems such as resource wasting, higher transformation...

In this paper, the noises of images taken by Cannon40D and CMOS industrial camera are analyzed both in time and space domain without outside illumination. The dark random noise associated with time is very low, which means the system noise is almost uncorrelated with time. However, system noise in the...

With the continuous development of the global navigation satellite system (GNSS) and related technologies, the research of performance testing of navigation receiver has gradually become the focus attention of the satellite navigation industry. Due to the influence of environmental factors, repeatability...

Along with the miniaturization of mobile terminals, antenna miniaturization is the trend of the development, because of its small volume, light weight, with carrier conformal and easy to implement dual-band, multi-frequency work, and many other advantages. This paper designed a model with multiple inhibition...

This paper developed a taxi operation status monitoring system consists of the passenger seat sensing device, taxi passenger operation state display lamp, taximeter, on-board wireless signal transmission communication terminal, monitoring center computer management system. By comparison and logical analysis...

China's UHF RFID band of 840 ~ 845MHz and 920 ~ 925MHz, distance of mobile communication CDMA800, GSM band near, vulnerable to interference in mobile communication system, resulting in demodulation bit error rate increased RFID tags. The interference of mobile communication system formation mechanism...

Approximate gradient method is improved for the maximum power point tracking (MPPT) of photovoltaic generation system. The improvements are implemented by: (1) applying constant voltage tracking method to narrow the search range when external conditions change drastically; (2) adding constraint conditions...

A fast and efficient inversion algorithm was suggested for high-resolution dual laterolog (HRDI) tool. The algorithm can yield reliable estimates for the depth of invasion zone and true-formation resistivity simultaneously. Both the behaviour of HRDL measurements and inversion were studied for various...

A high definition induction log (HDIL) device provides six resistivity responses with various radial detective depths. Its responses were influenced by saline mud filtrate invading into the reservoir dynamically after the formation was opened while drilling. The dynamic invasion process results in the...

The design of matching circuit for broadband underwater acoustic transducer is a key technology in sonar system. Matching circuit can reduce the energy loss of the power amplifier, extend the system bandwidth and improve the distortion of the transmitted waveform. In this paper, the theory of real frequency...

In power system, voltage quality has always been an important indicator to evaluate the reliability and stability of power supply. In engineering, to solve the problem of voltage drop at the end of power line, power capacitors are often used to maintain voltage stability. Taking a reactive compensation...