Showing papers in "Automation and Instrumentation in 2010"

Design and Implementation of Measurement Meter Reading System Based on Wi-Fi

Abstract: Introduced hardware and software method of a automatic meter reading system based on Wi-FiGiven the whole framework of AMR,described the wireless repeater,access point,the control center of the hardware structure and the respective roles in detailHardware platform which make up of Marvell 88W8686,the ARM7 processor and its peripheral achieve circuits wireless monitoringUsing μC/OS-Ⅱoperating system and LwIP protocol to achieve Wi-Fi communicationUsing VC++ and database to achieve the PC management software of meter reading,using the computer management system of the meter readings to realize the statistical management and billing,as well as moni-toring the running status,thus achieving the purpose of automatic meter readingThis system is flexible,practical,and effective to solve the problem of security and efficiency

Implementation of the Measurement Method and System for Transient Hightemperature Based on Colorimetric Temperature Measurement

Abstract: The exploration of the new measurement method of transient high-temperature field is very significant.Aiming at the problem,a measuring system based on the colorimetric temperature measurement technology for transient hightemperature field was put forward.The basic system structure,the basic principle of colorimetric temperature measurement in radiation temperature measurement and the principle of the colorimetric temperature measurement of system were discussed in detail.Some problems colorimetric pyrometers usually own that affect temperature measurement accuracy are introduced,and the superiority of colorimetric temperature measurement system designed in these problems was pointed out.The temperature measurement system was calibrated statically by high-temperature black-body furnace,and the temperature measurement accuracy of system was improved.Within the range of 2000℃ to 3000℃,measuring precision of 5‰ is achieved.Measurement results show that the measuring system can meet the requirements of transient high-temperature field testing.

Design and Realization of the Control System for Heat Transfer Training Device

Abstract: In order to meet the needs of practical training in colleges,we designed the process of heat transfer training devices which fits industrial production practical.Then give the key control strategies of electrical heating oil furnace,steam generator and heat exchangers etc.Choosing Siemens S7-300 PLC and MCGS software to realize the control system design of heat transfer training equipment.The modular program design method is adopted in the PLC software design,and offers a variety of functional module for choice.To guarantee the precise and stable control effects,we adopt cascade control in some control loops.This device has been put into use in colleges,and obtained the good training effect.

Water Quality Parameters Monitoring System of Data Long-distance Transmission Based on GPRS

Abstract: In view of the Liaoning Fuxin Jinshan plant for water quality monitoring points,the problem of fragmentation was proposed which is based on GPRS technology,water quality parameters on-line monitoring system design.Outlined in the system used in the most advanced technology to explain the system's overall structure and working principle.The system uses GPRS technology to achieve the on-site monitoring stations and data wireless connection between the monitoring center,so that the system costs at the same time can be stabilized to achieve real-time data transmission.

Design of the A/D Conversion Circuit for Ultrasonic Flowmeter Based on ARM

Abstract: Because the high-accuracy ultrasonic flowmeter has shortcomings of expensive,it has designed the A/D conversion circuit for ultrasonic flowmeter based on ARM.On the base of time-difference method ultrasonic flowmeter theory and the domestic-overseas advanced skill,a cost-effective low-power 12-bit ADC12DL040 chip and ARM processor LPC2138 were chosen for the design.The experimental results indicated that the designed A/D conversion circuit is able to accomplish the high-speed and high-resolution ultrasonic echo signal sampling,the minimum resolu-tion time of A/D conversion circuit is 0.305ns.The design and implementation of A/D conversion circuit for ultrasonic flowmeter not only lower the production cost,but also lay a solid foundation for the low-cost high-accuracy ultrason-ic flowmeter research.

Implementation of numerical controlled oscillator based on look-up table and XC2V1000

Abstract: This paper puts forward a method to achieve high precision NCO by combining chip FPGA XC2V1000 with SRAM based on working principle of NCO,and it also presents the characteristic and performance of NCO which designed by this method.

Design of Mine Monitoring System Based on ZigBee Wireless Network Technology

Abstract: The paper,a mine monitoring system framework based on ZigBee wireless sensor networks of studying IEEE802.15.4 standard communication protocol is proposed.This paper mainly introduces the design of wireless sensor network node of temperature,humidity and gas oncentration monitoring in the coal mine,software and hardware of data acquisition and transmission are designed in mine wireless network monitoring system.The monitoring signal acquisition and wireless transmission are realized.This design solves a lot of monitoring of wireless networking,the mine monitoring system has been successfully applied.

Design of Electric Power Parameter Monitoring System Based on DSP and CPLD

Abstract: Power quality monitoring technology is the hotspots of current research in the field of power systemsBased on three-phase power grid voltage and current signal acquisition and processing,this paper designs the power quality monitoring device data acquisition systemThe system uses DSP as the core processor,completed a multi-channel data acquisition,data processing,keyboard and display,CPLD and microcontroller peripheral interface hardware and software designOn the hardware side,the system takes DSP and CPLD as core of power parameter detection circuit,and complex programmable logic device CPLD and phase-locked loop(PLL) as synchronous sampling circuit;About the software,designed relative software arithmeticAt the same time,the main program of electric power parameters detection was introducedExperiments show the proposed system has fast response,high accuracy,and real-time processing

Design of constant pressure water supplying system based on PLC&fuzzy PID

Abstract: In order to supply reference constant pressure water for electromagnetic valve performance test of the washing machine, We design a water supply system that consists of PLC,fuzzy PID and frequency converter,and has precision and constant low pressure. In this paper,the principle,hardware circuit diagram and software design scheme of the system are introduced.Practice has proved that the system can supply the electromagnetic valve performance test continuous adjustable reference constant water pressure with 0.01-0.05 Mpa water pressure,0.6-30L/min flow.The system is easily controlled and it has high reliability,good protecting performance and high automation,so it has wide application future and popularization value.

Research of Multi-drop Humanbody Temperature Measurement System Based on DS18B20

Abstract: Humanbody temperature measurement is the primary means to prevent and control the flu,however,the tra-ditional thermometer has many discommodiousness in application.Based on DS18B20 digital temperature sensor,utilize STC89C516RD+ design multi-drop body temperature measurement system for schools.The system can server for 64 users every minute and show the temperature data by LCD 12864,convenient for the healthcare professionals.Result shows that system has the advantages of low cost,high efficient,easier to manage and meet the requirements measure mass users body temperature quickly.

Application of Feedwater and Dosing for Power Plant Based on Adaptive Fuzzy PID Control

Abstract: The high-parameter and large-capacity become the development trend of thermal power plant unit,In order to ensure the safe and economic operation of the thermal control system,Made more stringent requirements to control of chemical parameters steam and water of thermal system.With characteristics of a large delay,nonlinear,time-varying,In the process of dosing of regulating boiler feed water quality,It’s difficult to obtain satisfactory control effect in the traditional control methods.Research based on the characteristics of dosing for the thermal power plant water supply system,The fuzzy control introduced into the boiler feed water control system,proposed to combination of ideas of fuzzy control and conventional PID,designed self-adaptive fuzzy PID control model,simulation of the dynamic performance of the controller.Simulation results show that method has a good dynamic quality and regulation accuracy of adjustment.The effectiveness of the proposed method is also verified by the physical experiment.

Study on Adaptive Fuzzy Controller

Abstract: In order to improve the control accuracy of routine fuzzy controller,fuzzy controller based on the universe of discourse and rules self-adjustment has been exploited in this paper,which makes it have certain adaptive control function.The fuzzy controller realizes intersection and interpenetration between the theories of adaptive control and fuzzy control.To prove its applicability,a test was made using this controller in process of grind grading in a mineral concentration laboratory.The results show that the controller is suitable to the grind grading control system.

Design of Remote Environmental Monitoring System Based on PLC and GPRS

Abstract: The structure of remote environment monitor system is introduced in this paper. Siemens S7-200 PLC sends the real-time data of equipment’s state to the host computer automatically through the GPRS DTU, and can be able to receive the host computer’s instruction and send the history data within the specific time. On the host computer, the Winsock control of VB6.0 is used to receive the data of remote terminals and process them.It realized the remote environmental monitoring.

Parameter Tuning Method of a Single-parameter PID Control Algorithm

Abstract: Discussed a PID control parameters tuning approach using the feasibility of closed-loop response curve based on large inertia and time delay sestem.It turns the three control parameters for PID control into a single parameter of KP by the expansion of the response curve drawing method.Theoretical analysis and computer simulation results show that,the relationship between KP and the system’s closed-loop response characteristics is simple and intuitive,according to the closed-loop response curve,it can adjust the KP to make the response curves of the system to meet the control target.Besides the method can be more convenient to achieve self-tuning parameters through a computer program.Temperature control via a physical experiment to verify the theoretical analysis and simulation results are correct.The correction of the theoretical analysis and simulation results are verified by a Temperature control physics experiment.

Research and Realization of a Altitude Location Method for Small UAV

Abstract: General framework and autonomous flight strategy of a small UAV is presented briefly,then focuses on the realization of the hardware design and software algorithm of measuring and control of altitude.To get the precise attitude control and trajectory tracking,the data of multi-sensor composed of GPS、sonar and pressure sensor is processed through some data fusion algorithm is applied to GPS/INS integrated navigation system.Actual flight data shows that the flight control system design of hardware and realization of software algorithm cooperated perfectly and achieve the expected result.

Motor car engine detecting instrument development based on virtual instrument

Abstract: It is true that detect instrument of engine general performance will be used widely by Vehicle Maintenance Company.The detecting system is developed using computer as a controlled unit and software platform of virtual instrument Lab VIEW 8.5.This design has following advantages:Chinese operation interface,simple operation,friendly human-machine interface,perfect function,low cost and high efficiency,etc.

Remote Monitoring System of the Mountain Cracks

Abstract: The methodology and technology of the mountain cracks remote monitoring are proposed in this paper.The system includes two parts: the acquisition node is using the SOC microcontroller as its core,uses the displacement sensors to pick up the mountain cracks and the GSM module to set up the SM(short message) data transmission platform.With the low power supply management,the acquisition node can work continuously more than two months by the ordinary batteries.The indoor host manages the acquisition nodes through the GSM platform and connects to the PC with the RS232 interface and friendly expert system software is also designed.

Power measurement and data transmission based on STM32 chip

Abstract: The traditional power measurement based on 8 or 16 bits MCU has the weakness of precision and parallel dealing capability.Using DSP chip costs high,which can't be used widely.This article introduces a new method of power measurement and data transmission based on STM32 chip,which gives the hardware design scheme and software flow chart.The method can meet the demand of high capability and real time dealing,lower power,RS485 interface,GPRS wireless module,it's used conveniently and highly value.

Desigh of distributed control system of sewage treatment based on WINCC

Abstract: These years,the scale of sewage treatment factory is becoming bigger than ever by the development of our industry and increase of population density.For sewage treatment factory,distributed control system can improve the reliability of devices and the quality of water.Besides,it also can save energy and reduce workers' pressure at most.The distributed control system can bring economical benefit to the sewage treatment factory.

Design of Wide Range of Adjustable Power Supply

Abstract: The design was introduced which make single-chip microcomputer as the core of the intelligent high-preci-sion DC power supply,this closed-loop system is composed of integrated A/D,D/A of the microcontroller、three-ter-minal regulator source、Hall sensors and host computer.it has achieved high-precision wide-range adjustable voltage output,this power supply is especially suitable for a variety of occasions when it meet high precision,because the power supply is reliable,and has good performance,it has been successfully used in test equipment named some missile telemetry system.

Design of Full Automatic Digital Multimeter

Abstract: The design of the full automatic digital multimeter circuit is based on the microcontroller unit and the programmable logic device.The function of this type of multimeter is to read the archives and choose the measure range automatically by the physical quantity which is to be measured.And the function is realized using the complex table pens as test probes that are self-developed.This paper not only describes the principle of automatic identification between the direct current and the alternating current,the voltage and the current,and the electric quantity and the non electric quantity,but also it shows you the principle of automatic switch between the measure function and the measure range.In this paper the architecture composition diagram about the multimeter and the design of software and hardware are mainly discussed.The multimeter only has a power switch that can be pressed,a slot for complex table pens and a jack for the general black table pen.And there are no other parts that can be used to input information to the digital multimeter.It can be proved by tests that this multimeter has the advantages of stable performance,high accuracy,simple architecture,convenient use and low cost.

Online soft measurement for wastewater treatment based on MIMO least squares support vector machine

Abstract: Wasterwater treatment system is a complex non-linear system containing a huge amount of information.The wastewater quality parameters (such as BOD,COD,TN and so on) can not be monitored online or realtime,which has affected the effectiveness of wastewater treatment.In this paper,soft-measurement technology based on particle swarm optimization algorithm (PSO) and Online MIMO Least Squares Support Vector Machine to online-measurement of wastewater treatment is established,which has been applied to the online and realtime measurement for the real wastewater treatment processes and satisfactory results are obtained.

Intelligent Control System for Greenhouse Based on ARM+MCU

Abstract: This paper presents the architecture of ARM+MCU in hardware.Linux operating system and libraries of Qt were transplanted to ARM processor to develop human-machine interface,and on this basis,Web server and embedded database were transplanted to implement the remote monitoring of the on-site data.Microcontroller was applied to realize the control of the greenhouse.Cascade control algorithm was used to achieve precise control,and to eliminate the coupling effect,feed-forward was used on this system.At the same time,Smith predictor was added to the main regulator to overcome the effect of large delay and large lag.Filed results indicate that the novel intelligent control system for the control of greenhouse is reliable with high precision and good real-time,and that meets the requirements of greenhouse cultivation and has a high value of application.

The research and application of realizing the serial communication programming between computer and Omron PLC based on VB MSComm communication control

Abstract: In this article,how to realize the serial communication programming between computer and Omron PLC using MSComm communication control under VB (Visual Basic) programming environment is focused on.

Sharing of EHR Clinical Test Results

Abstract: To improve the utilization of clinical documentation,clinical information to meet anywhere,anytime access to business needs.In the full reference to the standard HL7 RIM based on the laboratory report and follow the IHE transactions and interoperability specifications,system using SOA frameworks and Web Services technology to build data centers and sharing of clinical test results CDA document sharing.It can achieved within a specific area of clinical test results EHR interoperability.Clinical documentation for electronic medical records to conduct a comprehensive proof of concept shared.

Design of Ethernet Interface Based on MSP430 and DM9000

Abstract: In order to improve the Ethernet data transmission efficiency,it designed a embedded Ethernet interface,whose core control unit is MSP430FG4618 to drive the Ethernet interface chip DM9000EP.Through the MCU to completed the initializatioin of the Ethernet card chip,data package,the control of receiving and sending;while the Ethernet card chip is used to receive and send data from Ethernet.The test results showed that the transmission process of UDP data;and UDP transmission efficiency is increased through cutting the UDP/IP protocol stack.With simple design,low price,little peripheral equipment and short development cycle,the interface can satisfy some requires from the testing,data acquisition systems of high speed data transmission.

Parameter Adaptive Fuzzy PID Control for Once-though Boiler Power Unit

Abstract: Based on a 765 MW combinational once-through boiler turbogenerator unit,this paper designs the typical parallel fuzzy control system for the output electric power and enthalpy,and researches the parameter’s adaptive tuning method of the fuzzy controller.First,it analyses the mathematical model of the once-through boiler turbogenerator unit.Then based on author’s previous work,given the parameters’ adaptive tuning method of the fuzzy controller based on author’s previous work.Finally,the simulation results show that parameter adaptive fuzzy PID controller can effectively reduce control system’s oscillating and regulating time,whose static and dynamic property is more than the basic parallel fuzzy PID control system.

Dynamic state based on MD5 algorithm in enterprise ERP system

Abstract: In this paper,A Double Factors Security Attestation Method based on SMS Dynamic Password and user static password was givenwhich focuses on the problem about Security defect of user single static password security Mechanism used by Existing enterprises,and Discussed the RealizationThis method need not change existing system architecture,and can verify the user's legitimacy effectivelyMaked up many of the traditional disadvantages of single-factor Attestation

Communications Application of Siemens PLC and Air-compressor RS485

Abstract: According to Modbus industrial network protocol,developed the application system in process field-control and supervisory level,based on Siemens PLC S7-300,where several air-compressors are running.Respectively achieved the data exchange between operator,PLC and RTU.Otherwise,it provided standard input/output signals to field instruments and actuators in the same level.In general,the solution is universal and realtime to Modbus network,and it's easy to operate and maintain.

Design and Implementation of Intelligent Monitoring Watt-hour Meter

Abstract: A multi-function watt-hour meter with automatic measurement and monitoring was designed for power distri-bution terminal,To achieve automatic measurement,automatic monitoring and control.And software and hardware de-sign of it are introduced,and its monitoring and control function were emphasized.Accuracy degree of watt-hour meter was improved by using ATT7026A chip;Electrical parameters automatic measurement,monitoring and control functions were realized through gathering electrical parameters of end-users on time,and analysis,comparing on the gathered data and data from standard meter by microcomputer.Preliminary tests show that the multi-function watt-hour meter has accurate measurement,good performance,high intelligence,and can meet design requirements on measurement,monitoring and control.