Showing papers in "Automation and Instrumentation in 2012"

Research of the Laser Navigation System for the Intelligent Patrol Robot

Abstract: Aimed at the deficiency of the navigation system of the intelligent patrol robot,the laser positioning technology was applied to the navigation of the robot,a prototype navigation system was designed,and an experimental test was made in the outdoor environment.Experiment test results show that the robot running was steady and the quality of navigation was precise.In addition,the theory of laser positioning and navigation control involved in the laser navigation system was discussed in this paper,the hardware structure and software flow chart of the navigation system were also given out.

Positioning in Unmanned Vehicle Based on GIS and Environmental Perception

Abstract: A method of positioning in unmanned vehicle based on GIS and environmental perception was proposed.The approximate track of the vehicle was first calculated through the wheel encoder and electronic compass,and then matched to the GIS map so as to get the vehicle location;vehicle's accurate positioning was obtained by comparing to the iconic objects in travelling that were perceived by measurement sensors such as the camera and laser radar.The test results show that this method can realize the global positioning of the vehicles in local map,and works well in practical environment.

Automatic Detection of Liquid Level in Transparent Bottle Based on Machine Vision

Abstract: The automatic detection of liquid level in transparent bottle can improve detection efficiency greatly.A new kind of liquid level detecting system with a field rod was proposed which was based on machine vision in the paper.Due to the refraction virtual phenomenon in liquid the filed rod behind the bottle seems to be broken at the liquid surface.So the liquid level can be obtained through finding the position of the rod broken by image processing technology.The results of 72 images of liquid level show that the system has better stability and high detection accuracy.It is practicable in automatic detection of liquid level in transparent bottles.

Research on the ECG Signal Denoising Algorithm Based on Wavelet Transform and the Median Filter

Abstract: In the process of ECG signal data acquisition,it was necessary to involve the electromyographic interference,baseline drift and 50Hz interference,while using the conventional system identification rules often to some extent and was difficult to identify the characteristics of ECG signal.Median filter was a kind of simple operation,high speed nonlinear signal filter,it was commonly used in the ECG signal denoising process in low frequency,such as baseline drift.Since WTS two dyadic wavelet was a set of band-pass filters with different scales,different frequency bands.The wavelet transform was used to decompose the original signal selected.Wavelet transform coefficients of the reconstruction was formed to eliminate interference in ECG signal.The simulation experiment to determine how adaptive threshold selection,appropriate level decomposition and wavelet function.Through using the MIT/BIH database of ECG signal,and combining with the computer simulation of the formation of ECG signal on the method of testing.Conclusion shows that this algorithm can effectively restrain the main noise in ECG signals,meet the ECG waveform analysis of clinical and diagnostic requirements.

Design of the Monitoring and Control System for Elevator Internet Based on CANBus

Abstract: This paper made a detailed design of the elevator internet application level protocol based on CANBus,and this application protocol was applied to elevator monitoring and control system.The structure and function of elevator internet monitoring and control system was discussed,and the frame of application level protocol was studied,and message exchange route was described.The elevator signal collector hardware and software,central room monitoring software and database had been provided completely.

Study of the Path Planning of Unmanned Vehicles Based on the Multi-curvature Fitting-model

Abstract: To solve the problem of local path planning of unmanned vehicles,this paper proposes a path planning algorithm based on the multi-curvature fitting-model.We set up the candidate path set produced by the three times curvature polynomials after considering the actual characteristics of unmanned vehicles,and use the four times repetitive cycle parameters method to solve the problem of calculation of the three times curvature polynomials' parameters.We can choose the optimal path in the current environment from the candidate path set according to the evaluation function.With the path planning algorithm put forward by this paper,unmanned vehicles passed a few intersections successfully,which proved that this algorithm is effective.

Design and Implementation of Pan-tilt Control System in UAV

Abstract: According to small UAV aerial applications,design a onboard pan-tilt control system based on ARM,implement remote control of the pan-tilt attitude and camera parameters through PC keyboard on the ground.According to the received real-time image information,manual given the expectations of the pan-tilt deflection angle;Use potentiometric sensors to collect the actual angle data for feedback,then drive the pan-tilt timely to adjust the camera according to the control algorithm,the camera will always be able to shoot to the target object;And at the same time through the ground monitoring software,real-time observation of airbrne pan-tilt state information was possible.This design has been successfully applied in a small unmanned aerial vehicles,and achieved good control as well as shooting effect.

Design of a Phased-controlled Incremental PID Controller with Dual Temperature Sensors

Abstract: Since the majority of temperature-controlled objects have the characteristics of big inertia,pure time-delay and nonlinearity,using the traditional PID control method was difficult to achieve high accuracy requirements.Considering these characteristics,a phased-controlled incremental PID controller with dual temperature sensors was proposed in this paper.And this PID controller was applied in capillary rheometer.Experiments show that the proposed PID controller can obtain satisfactory control effects,easy to use,and it has a strong reference value for industry controlling and scientific research.

Simulation on Behavior-based Formation Control of Multi-robot

Abstract: The behavior-based formation control system was chosen to be the main research direction.Five sub-behaviors called move-to-goal,avoid-obstacles,swirl-obstacle,keep-formation and random-noise were designed for the formation control mission.The step control zone method was introduced,which provides high tolerance to positional uncertainty.Using Teambots simulation system,line formation control was simulated.Aiming at the line-formation,single virtual referenced point method and double virtual referenced point method were used,and double virtual referenced point method performs better.Simulation experiments indicate the feasibility and validity of the control strategy.

Platform Design on Building Energy-saving Monitoring and Management System

Abstract: Described the overall platform architecture and programming implementations of the data center of energy consumption monitoring and management system,and a detailed description of the main functional modules of the platform;The purpose of the design of the system in order to obtain accurate and efficient building energy consumption statistics,and refinement of energy management and to carry out the correct energy-saving based on the energy consumption data.The system has been run successfully in a commercial building.

Modern digital image noise filter technology and its evaluation

Abstract: Image noise filtering is an important method and technique in digital image processing.Firstly,Image noise model and its characteristics are introduced.Secondly,it is analyzed and summarized that the traditional linear filtering and nonlinear filtering,novel filtering theory and technology for the impulsive noise and gaussian noise in image.Finally,the quality assessment,the present situation and development to image noise filtering are discussed and taken a glance into the future.

Design of Multi-channel and Precision Digital Collecting and Storage System

Abstract: This paper introduces a recording device designed with real-time data collection,analysis,storage and display functions of data acquisition systems.The system uses a XC2S200 FPGA chip as the core of the system control device to achieve signal acquisition and data frame,and data storage.Now the acquisition system with the test equipment has been applied to a aircraft test and completed its test parameters of the acquisition,recording and monitoring.

Simulation on Behavior-based Formation Maintain and Transform of Multi-robot

Abstract: Style requirement for the Chinese control conference in the paper.The writers of papers should and must provide normalized electronic documents in order to readers to search and read papers conveniently.Behavior-based formation control method was chosen to be the main research direction.Five primitive behaviors called move-to-goal,avoid-obstacles,swirl-obstacles,random-noise and maintain-formation were introduced for the formation control strategy.Several formations are simulated avoiding stable obstacles at the same time.The neighbor and leader referenced methods are combined so that the formation figure can be changed according to the environment.Simulation experiments indicate the robot team equipped the new method can get through the large scale obstacle,and the control strategy was feasibility and validity.

Nonlinear Quadruple Tank Model Predictive Control

Abstract: To overcome the difficulty of implementing predictive control in the industrial field,the strategy of integrating Matlab and PLC / HMI industrial control system by using OPC communication technology,and predictive control scheme was proposed.A mechanical model was established for quadruple tank system and through the online identification to obtain unknown parameters of the quadruple tank model,and control the level of quadruple tank.The actual control results show that predictive control can make a good following the tracks of set value,and proved the feasibility and validity of this control strategy.

Photosynthetically Active Radiation Sensor and Its Conditioning Circuit Design

Abstract: Current measurement of photosynthetically active radiation(PAR)is dependent on imported products such as detectors and conversion equipment with high cost both for purchase and calibrationAlthough many domestic related researches are conducted,there is a lack of commercialized,stable and precise equipmentAfter analyzing the operating characteristics of the photocell,the physical design of PAR sensor is showed and the conditioning circuits design of its output feeble signal is introducedWith simple structure,it is easy to install the sensorThe conditioning circuits achieves the functions such as feeble current-voltage conversion and amplification,filtering high-frequency noise on the premise of low powerThe test results show that the PAR sensor and its onditioning circuit are stable and can fit the dynamic outdoor environment with the linear correlation up to 09879 between the converted output voltage and PAR

A new method to realize FFT based on IP core

Abstract: In digital signal processing field,the traditional FFT is often realized by software and ASIC.Now,due to the emergence of FPGA,FFT can be realized by more convenient and flexible methods.A novel approach to compete FFT is represented on the basis of FFT IP Core developed by Altera.It has many advantages such as simplicity,flexibilities,short periodicity and low cost.

Ultrasonic Rain Gauge Based on Acoustic Self-calibration Principle

Abstract: A novel rain gauge based on acoustic self-calibration principle was proposed in the paperAcoustic self-calibration principle can eliminate the uncertainty of the velocity of ultrasound and achieve accurate measurement of rainfallThe rain gauge not only overcomes the influence on the rainfall measurement under intensive rainfall conditions,but also improves the precision of rain gaugeBoth theoretical analysis and large number of experimental results show the effectiveness of the rain gauge

Application of AGV Controll System in Tobacco Logistics Process

Abstract: According to the traditional domestic tobacco industry overall logistics automation equipment level was relatively low,the technology level was relatively backward,labor productivity was low status,introduced the AGV control system in the advanced control technology and network technology.By Tianjin cigarette factory as an example,describes the application of AGV control system in tobacco logistics process.Through the use of the system,to a certain extent improved the tobacco enterprise traditional,backward logistics transport links.

Heavy metal Monitoring and Mobile Warning System for contaminated water

Abstract: In view of wide distribution and bad environment characteristics of heavy metal monitoring for polluted water,designed a heavy metal monitoring and mobile warning system for contaminated water based on wireless sensor networks and J2ME technology.Placed sensor nodes in polluted water areas,the pollution data was collected through the ZigBee wireless sensor,the data was sent to smart phones through the GPRS network;and was also sent to the database of monitoring center through the Internet and wireless base station,the mobile client can get overrun limit alarm data from the GPRS network,and can also get dynamic analysis data from the monitoring center,to achieve real-time monitoring and mobile early warning.

Design of Bus Adapter Between Modbus and Profibus-DP Based on dsPIC

Abstract: With the development of Profibus in industry,increasing local instruments and equipments require Profibus communication interface.The Modbus-Profibus-DP Bus Adapter was designed by combining dsPIC digital signal controller and intelligent communication chip VPC3+C.This paper introduced overall structure,hardware interface circuit and flow chart of software for bus adapter.The Bus Adapter has been successfully applied in automatic control system for a machinery factory of SINOPEC,which provided a effective solutions for protocol convertor between Modbus and Profibus-DP.

Design and Implementation of Intelligent Control Network System for Aquaculture

Abstract: In order to improve the level of industrial aquaculture,an intelligent monitoring system based on Profibus fieldbus was proposed.This system makes automatic detection and control to the dissolved oxygen,pH,temperature,water level and other main environmental parameters of the breeding pool by fieldbus,PLC,sensors and computer technologies.The human-machine interface and database systems were developed to achieve real-time acquisition,dynamic monitoring and processing of breeding data.The practical application shows that the system runs stably and reliably,was easy to expand,and effectively improvs the automation level and product quality of aquaculture.

Design of Automated Test System of Blade Server

Abstract: An automated test system for blade server motherboard was presented,which could test board performance including BIOS,BMC and SAS controller accurately and efficiently.The blade and the test system were connected by a power interface board.The test data could be acquired and displayed in real time with the test machine using VB Language program.The database was established and connected with test program by ADO technology,which could make the test record automatically saved and select query.Practical application on server production shows that the system meets the requirements of motherboard's online testing.

Research on Improved GA Boiler of the Main Steam Temperature Controller Parameters Optimization

Abstract: In order to solve the problem of large inertia,large time delays,time variation in the control of main steam temperature,a genetic algorithm(GA)optimization method of cascade-PID parameters was proposedIn this optimization control system,a hierarchical multi-objective optimization controller was used and PID parameters real-time optimization was given by GA,which makes it adapt to time-varying characteristics of the main steam temperature controlled objectTo be the real-time optimization and avoid large amount of computing and early maturity of the genetic algorithm,the basic genetic algorithm was improved by ranking selection,adaptive crossover and mutation,narrow search spaceThe simulation results show that this method can effectively improve the control performance of the system and the robustness of the control system

Design of Intelligent Tracking Car Based on MC9S12XS128

Abstract: A intelligent tracking car system was introduced,which uses the MC9S12XS128 microcontroller as main controller and collects the road image information using HQ7620 image sensors,the motor drive module of the car adopts BTS7960 drive chip,and the real-time speed monitoring was achieved by the 100 lines photoelectric encoder.Having analyzed and processed the collected road image information,the main controller controls the steering gear angle and allocates the rear wheal driving force dynamically,thus completing the function of intelligent tracking.

Research on Hardware Performance for Thermocouple Temperature Measurement Modules

Abstract: Thermocouple is an important measurement tool in thermal detection measurement.Researching the anti-jamming ability of the Thermocouple temperature sensor module has the great significance.This paper,begin with the performance index of thermocouple temperature sensor module,and combining the theory analysis and experimental cases,design a kind of high precision,strong anti-jamming performance of hardware.Developed the products with the cold junction compensation and thread break detector function,can through a series of electromagnetic compatibility test,can satisfy most of the industrial application.

Design and Implementation of Energy Management and Control System Based on ZigBee Network

Abstract: Iron and steel enterprises are the pillar industry of national economy,and also the key target of the energy saving.This paper takes the Nanjing Iron and Steel Group Medium Plate Factory as the case,the design of intelligent energy management and control system based on ZigBee wireless networks was shown,which is composed of the field level,the communication network level and the management level and in three layer to build the system.The ZigBee nodes were designed specially for the data gathering system in the case from the hardware and software.The systems operation was good in the real-time data gathering and the correspondence success ratio,satisfies the design requirements.

Amending Technology for Drilling Pressure model Based on Neural Network

Abstract: Through the conventional drilling hydrodynamic model to calculated the bottom-hole pressure value,it could reflect the variation tendency of the bottom-hole pressure but fails to reveal the actual measured values.Based on drilling Hydrodynamic model and actual bottom-hole pressure value measured on site,this article adopts BP neural network technology to build self-study algorithm so as to make the deviation of the bottom-hole pressure to the minimum after the calculation of the drilling Hydrodynamic model trained by the on-site measured value.The actual application on site shows deviation of the calculation results which are revised by the model was slight and right among the allowed range of deviation under the safe drilling pressure supervision.It could meet the demand of the routine drilling.

Design of Remote Zoom Control System Based on STC Microcomputer

Abstract: In order to the 3D camera can realize remote zoom control,a remote zoom control system was designedThe upper system and lower system adopts STC-12C5A60S2 as CPU,and button circuit,pulse switch circuit,stepping motor driving circuit,serial port communicating circuit,wireless sending-receiving circuit were added into the systemThis paper mainly illustrates the interface circuit of upper computer and lower computer,the stepper motor driver circuit design,provides main flow charts of softwareThe function that the two diaphragms can be focused in a remote way was realizedThe real function testing indicates that this system was of stable performance,safety and reliability,some multi-purpose,good use value and wide market prospects

Coal Dust Detection Based on Improved Simultaneous Iterative Reconstruction Technique

Abstract: In order to detect coal dust particles a extinction tomography system,adopting the combining method of light extinction and process tomography was proposedFirstly,optical sensors array were employed to create the optical sensing field for coal dust concentration;In addition,a novel image reconstruction algorithm,simultaneous iterative reconstruction technique(SIRT),has been applied and also tested on the modelingAiming at the disadvantage that SIRT has a slow speed,some improvements have been made by adding the weighting functionFinally,the results of image reconstruction were presented for simulated which prove that the optical tomography technique based on the multi-sources fan projection can be an effective approach to reflect the coal dust concentration distribution

Design of Tap Water Pipe Network Wireless Supervision System Based on VPN

Abstract: A pipe network wireless supervision system was designed for tap water dispatching system which use virtual private network(VPN)technology to combine central control room with scattered pipe networkThe function of VPN and superiority in industry were stated in detail,in which the VPN network described the key role,and the realization of PLC and supervision software were also discussed in this paperThe operating result show the feasibility of the method