Geological Data Library is an important component of Land and Environmental Resources Department of Hainan Province, which is responsible for the collection and management of Hainan province's regional geological data, such as geological survey data, solid mineral geology data, petroleum geology data,...

Very fast transient overvoltage has become an important research topic in international high- voltage field due to its generation, features and the influence of GIS on insulation breakdown characteristics. In this paper, the distributed parameter simulation model is established in view of the VFTO generator,...

From the last ten years, control and analysis of systems with delays is subject to lots of studies and contributions. This paper presents about the design of cutting system for time-delay. The design of the control system is constructed using the easy algebraic algorithm of matrices whose elements are...

Signal acquisition and processing technology based on FPGA is researched. FPGA is the core of the signal acquisition and processing systems, it controlled each module to complete signal acquisition and processing tasks. The article mainly researched and designed of FPGA-based control and processing systems,...

This paper introduces a temperature of copper electrolyzer and voltage acquisition system which is divided into three layers, lower computer collects cell temperature and voltage using MCIMX287CVM4B, then sent to the gateway basing on the MCIMX287CVM4B through wireless network, in the end the gateway...

this paper introduces a kind of the rectifier circuit, adjustable constant current charging circuit, detecting voltage circuit, display circuit and power circuit of six parts of constant current source charger design scheme. The charger using op-amp composition adjustable constant current charge, constant...

This paper discusses the principle design of real-time monitoring system for high voltage circuit breaker operation, monitoring and analysis for the monitoring principle and mechanical characteristics of the opening or closing coils.The devices are used in substation, and the actual monitoring data can...

Regarding an isolated system in Huolinhe region as the object of study, in order to reduce the system voltage fluctuation and improve system voltage stability, the paper proposes that the wind farm uses the access way of flexible DC into system. The Flexible transmission mode bases the DC voltage source...

It adopts three-level inverter as the main circuit of Static Synchronous Compensator (STATCOM), making the output waveform of main circuit more close to sine waveform and the contents of harmonic reduced a lot. Space voltage vector modulate technology (SVPWM) is widely used for control algorithm of three-level...

DSP full digital control in pulse laser welding power source is composed of Boost and Buck two topological structure. Through the ADC of DSP can test the laser energy, and charged the current of laser xenon lamp in real-time. Through the software PI algorithm to adjust the duty cycle of the IGBT in real...

The industrial frequency voltage regulator is used for the traditional filament power of electron beam melting furnace, it cannot realize the filament current closed-loop adjustment. To solve these problems, a 20A/300W filament power of electron beam melting furnace based on TMS320F28035 is designed...

This article mainly analyzed the existing transmission lines ice mechanics calculation model of the amount of ice, the key to calculate transmission lines ice, the amount of calculation is proposed considering the tower to wire length, horizontal stress and vertical than three critical loads of linear...

Ultra-weak Bioluminescence is physiological phenomenon widely presenting in all biological life activities, which reflects the integrated vital signs of organisms. This paper analyses the current application of Ultra-weak Bioluminescence in biomedicine, agriculture, environmental science, food detection...

In order to further improve the measurement accuracy and convenience, a novel depth of engagement intelligent measurement device for handcart circuit breaker contacts about metal-enclosed armored high voltage switchgear was developed. The device includes six sets of precision displacement measurement...

In this paper, a novel capacitive pressure sensor with large dynamic range is presented. The working principle and the design structure of the sensor are demonstrated in the paper, then the theoretical calculation of mechanical properties, capacitance and the simulate results are performed. The study...

Based on the extensive application of small hole, how to guarantee the machining efficiency and machining quality of the hole at the same time is the key problem we need to solve. We analyze several factors affecting the machining quality of the hole and find their influence law on the machining accuracy...

After the rapid development of fault diagnosis technology for decades, there have been numerous methods based on different principles. For example, based on the analytical method of the model, the method based on signal processing and based on the method of knowledge. On the basis of comprehensive literature,...

A kind of information fusion algorithm is designed based on extended D-S rule for multi-sensor synergy detection, in order to solve the multi-source information fusion problem of uncertainty and conflict in life recognition. First, multi-sensor synergy life detection platform structure is given. Second,...

Analyzing the current lack of reliability test design and considering the producer’s risk and consumer’s risk, the reliability test design model for compound system (CSRTD) based on information fusion was constructed. Analyzing the requirements and constraint conditions of reliability test design, the...

A novel UWB filter is proposed based on Split Ground Structure(SGS) in this paper. LC equivalent circuit of SGS is drew by analyzing its electric field, magnetic field and current distribution, giving its methods and formulas of SGS parameter extraction. Finally we give LC equivalent circuit of the entire...

Based on information fusion, analyzed submarine cable probe positioning technology and methods, through the information classification and information correlation in submarine cable detection process, proposed submarine cable five parallel-type information fusion method, improved information processing...

The contents of Ni, Co, Mn and Li in LiCoxNiyMnzO2 cathode material were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) method. The samples were dissolved in aqua regia. The analytical spectral line for Ni, Co, Mn and Li was 232.0, 237.8, 279.4 and 610.3nm, respectively....

Photovoltaic power as a kind of new energy of clean and renewable, it with unique advantages is recognized as the energy of most advantage in the future, therefore, this paper put forward the corresponding design based on the design requirements of TL494 photovoltaic inverter power supply, through select...

This paper will introduce in detail how to adopt the Target Area Mechatronics System to realize the full closed loop control of light beam leading and target precisely fixed position, and Target Chamber Vacuum Control System and Ambi-room Sweeping Control System, auto program flow of shooting target...

Deep-sea releaser is very key element in the research of deep-sea scientific and has broad applications, the most typical releaser is the acoustic releaser. This paper expounds one new type releaser on the principle of lever to accomplish the purpose of reducing the failure rate of release making full...

The facet temperature characteristic of 808 nm semiconductor laser was researched. Catastrophic optical mirror damage (COMD) is one of major factor, which drastically limits optical power and lifetime of semiconductor laser. The heat source of semiconductor laser facet and the facet temperature field...

For the shortcomings of current transformer monitoring alarm systems exist in data transmission, designing transformer monitoring alarm system based on ZigBee technology.Systems with TI's CC2430 ZigBee module as the core, using a precision chip DS18B20 as digital temperature sensor for designing temperature...

In the paper, some risks of sudden death for teenager during exercise are analyzed. In this system, Android terminals are adopted as data collection nodes according to practical demands, and MINA-frame data transmission is adopted based on Socket. Also, data stream server, scheduled task analysis server...

The electronic equipments have numerous kinds and complicated configuration, which have been largely used in army. How to upgrade the maintaining ability of electronic have always been our work point. The research aim is to find out the main reason which causing electronic system failures from electronic...

The Parachute deployment height of sensing reconnaissance submunition has great effect on its landing state and precision; to determine deployment height of sensing reconnaissance submunition, using MATLAB/Simulink simulation platform, the motion of Parachute-Submunition System was simulated by numerical...

Aim at solving the constraints of storage and processor of the slow data acquisition system, the system based on SD card and LPC2141 is designed. It adopts 6 channels AD sampling which sampling rate is more than 400ks/s and SD card with large capacity storage, and extends the transmission function by...

Frame torsional rigidity has great effect on the fatigue strength of the frame and the dynamic performance of vehicle. But the test for the frame torsional rigidity was very difficult. An improved torsional rigidity test method is proposed referring to analysis of distortion of frame in line running...

RFID is a technology which is used to identify remote objects equipped with RFID tags by wireless scanning without manual intervention; it can be used in traffic congestion management. In this paper, we propose a framework of traffic congestion management using RFID technology; a RFID tag management...

An embedded environment monitoring system that can be applied in warehouses, museums, families and other occasions is designed and implemented in this paper by using high-performance Nios II and open source embedded operating system. The system realizes the data display, data analysis, parameter settings,...

In this paper a brief review is presented on the working principle of anti-yaw damper used widely on EMUs (Electric Multiple Units). Based on the Maxwell model, the piecewise linear model was developed by considering the rubber joint stiffness, the oil stiffness and the piecewise characteristics of hydraulic...

This paper presents a fall detection system for elder people using wearable single inertial sensor. In contrast with multiple wearable sensors, we deploy only one 3-axis accelerator on human body for continuously monitoring fall incident. Support Vector Machine is exploited to be the classifier for predicting...

Nowadays, food safety has drawn increasing attention because of its importance, yet the cost spent on food forgery prevention is expensive and the system is hard to maintain, therefore a low cost system is worth developing. Based on the above fact, this paper proposes a system design for food forgery...

Radio frequency identification (RFID) is a kind of automatic identification technology; it can easily finish automatic data acquisition and recognition by the way of noncontact reading. In the clothing industry, the clothing logo includes much more information and has many problems such as the low speed...

Simulation and collision check are the essential function to avoid the potential collisionin inspection process based on three-dimensionalComputer Aided Inspection Planning (CAIP), especially in the complex parts measuring,which can promote the efficiency of digital measuring equipmentsuch as Coordinate...

A system for promoting the safety of workers comprises a digital imaging device positioned to capture one or more images of a predetermined viewing area. Further, the system comprises an image processor operatively associated with the digital imaging device. The image processor is configured to determine...

The thesis deals with the design of intelligent household environment monitoring equipment by the use of ZigBee technology. The system design takes STC12c5a60s2 single-chip microcomputer as the core module of data acquisition terminal. It is a ZigBee-based wireless sensor network acquisition system with...

This paper begins with the problems encountered in logging while drilling practice, proposing the necessity and requirement of receiving circuit with rigorous design. Considering the fact that the amplitude of noise signal with low frequency is far greater than that of formation wave, this paper provides...

Given the problem that the range resolution is reduced as a result of overcoming the reduction of SNR (Signal to Noise Ratio) of echo signal only by enlarging the pulse length due to deeper water depth and worsened turbidity in multi-beam bathymetry of single frequency pulse, multi-beam bathymetry method...

In this paper, a new type of low frequency spherical vector hydrophone is designed. It can be directly installed on the underwater platform and sense the underwater acoustic particle velocity. The sensing element is a moving-coil geophone. The paper described the structure of the spherical vector hydrophone,...

Underwater complex sound sources have many types. The radiated power of these sound sources was obtained by measuring pressure in the ocean, but the measurement based on sound pressure in the ocean has some uncertainty. The sound pressure for one point or several points is not enough to characterize...

High frequency arc transducer array is mainly used in multi-beam image sonar, transmitting wide beam waves. The directivity diagram of the high frequency arc transducer is calculated based on the theoretical formula and the directivity characteristics are analyzed. Laboratory verification is conducted...

This paper analyzes the impact of coupling effect on the high-frequency circular piston transducer. Focuses on the impact of the direction and the transmission voltage response in the case of constant thickness and mutative diameter. Raised a new method for Circular piezoelectric wafer center opening...

The unique constraints for the mother ship of towed sonar in bearings-only tracking is that it cann’t maneuver frequently because during maneuvering and a certain time after maneuvering, the bearing measurements are not available. The maneuvering trajectories of the mother ship will greatly affect the...

The power amplifier operating in a low frequency with high output power is always the hot issue in the sonar transmitter system in underwater acoustic field. This paper provides a Class D power amplifier for a transmitter in a sonar system. We first describe the basic principles of power amplifiers....

In this paper, we propose an optimum coding STMV beamformer to improve the performance of suppressing high peak sidelobe level with missing sensors. It considers the choices of sub-array geometry have a significant effect on the performance of STMV method using sub-array (we call it STMV-SA), and the...

The transmitting system is the core part of active sonar, its amplitude-frequency response is an important element to judge the system, and an important indicator to measure its performance is the bandwidth flatness of the amplitude frequency response. When the amplitude-frequency response is seriously...

The miniaturization of the low frequency, high-power transducer has becoming the hot spot in the transducers research. With the variety type of sonar’s working frequency went below, the increasing demand for low-frequency performance of the underwater acoustic counter device. The conventional low-frequency...

A dynamic programming (DP) multi-target detection and tracking algorithm is developed for the simultaneous detection and tracking of low signal – noise ratio (SNR) targets in passive sonar processing. The detecting and tracking approach is considered as a special problem of multiple dimensional image...

The paper analyzes the layout structure and working principle of driving axle performance closed test bench. The design concepts of test bench drive mechanism and loading mechanism are described on the basis of confirming the design scheme. Layout reasonability of the design structure is analyzed, and...

The magnetostrictive linear displacement transducer is a kind of transducer that can calculate the distance between the measured point and the receiving point by measuring the time difference between the excitation and the receipt of elastic waves. This paper describes research work in a kind of magnetostrictive...

This paper presents the design of airborne flight data recorder based on the ARM Cortex-M3. Aiming at the growing complexity of flight parameters and the increasing amount of data storage needs, we propose the method which uses a SD card as recording body and STM32F103ZET6 as the CPU for the airborne...

In order to ensure the quality and stability on the CAN bus products an automatic test system for CAN bus conformance testing is introduced, which allows the tester to execute the test validation automatically. CAN bus test module, test programs and some special test tools constitute the test system....

Fluorescence is generally adopted in molecular diagnosis. In order to detect weak fluorescence signal, a weak fluorescence detection circuit has been design based on a photomultiplier tube. The circuit mainly consists of three parts which are a photoelectric converter circuit, a pre-amplifier circuit...

Fiber Bragg grating is sensitive to temperature and strain, which lead to the temperature compensation must be considered when the FBG strain sensor is applied. Discussed several typical temperature compensation scheme for the applicability of the FBG strain sensor, analyzed the important factors which...

In the chemical industry, a large pressure range, relatively stable voltage output DC power supply is often required. This paper mainly studied on the control method of DC conversion circuit. The full-bridge configuration electromagnetic isolation has advantages in efficiency and pressure range. The...

The analysis and research inductive AC circuit characteristics for guidingthe use of inductive load equipment has practical significance. By combining experimental electrical theory to explain inductive AC circuit voltage and current relationships, power, influence electrical shunt capacitance of the...

In order to evaluate the quality of the protective films, we built a Spectral-Domain Optical Coherence Tomography System. To get the 2D and 3D image of normal materials and defective materials, and the quantitative analysis has been done. Compared with the parameters provided by the manufacturer, the...

Nowadays, WiFi becomes a popular wireless accessory method to most of us. People use WiFi to interact with the wireless Internet, perform commercial and financial transactions, or conducting recreational activities, etc. Though it offers a more convenient life to people, the strong Electromagnetic waves...

This paper studies the relationship between the fusing characteristics of copper wire and the overload current. Based on a physical model, the fusing curve for the copper wire is obtained. At the same time, fiber Bragg grating (FBG) is used to monitor the temperature change of aerospace conductor. According...

The designing of microwave cavity reactor for microwave metallurgy is usually according to the nature and the dimensions of the product to be processed, the operating frequency, the number of modes and so on. In this paper, the main mode equivalent impedance matching is proposed to design the cavity...

By real-time data acquisition of pitching and rolling angle in the process of driving, portable car body posture monitoring system designed in this paper executed the analog-to-digital conversion of these acquisition signals, and displayed the real-time posture of vehicle on LCD after analyzing. Finally,...

The in-situ ceramics coating were fabricated by the micro-arc oxidation technology in order to improve the corrosion resistance of Ti6Al4V alloy. The silicate electrolyte system was introduced to reduce the applied voltage of the MAO coating. The influence of applied voltage on phase composition, surface...

With the problem that the pressure of the flexible pipe in aerial refueling was hard to be measured directly by sensors, a pressure measurement algorithm based on support vector regression (SVR) with parameter optimization was proposed in this paper. First, a data model with a large amount of historical...

Equipped with KATERINA, the buoy provided effective technical platform for on-site rapid monitoring of the marine radionuclide. Performance index and usage in the ocean buoy of KATERINA was introduced. Ultrasonic cleaning method in seawater was developed for preventing KATERINA from biofouling. Marine...