Abstract: The particles in lubricating oil reflect a lot of information of Mechanical operation Status,so the particle detection has a very important engineering application.Design a three-coil inductive particle monitoring sensor,according to the coupling relation between particle in lubricating oil and the induction coil.Basing on the sensor measurement principle,the detection circuits include drive circuit of amplitude and phase adjustment,pre-amplifier,precision rectifier circuit and the second stage filter amplifier circuit.The results show that:the detection circuits combine with the follow-up signal acquisition module and the LabVIEW NI data processing,the detection resolution of ferromagnetic abrasive reaches 100 μm.

Abstract: The image processing unit is key to the precision and timeliness of the moving target tracking system.The system collects the dynamic image and preprocesses it,then sends the results to the image processing unit to accomplish the operation of median filter,edge detection and match tracking.The paper introduces an improved median filter algorithm and a novel edge detection algorithm based on Sobel algorithm.After manipulated as above,the image processing unit decreases the times of operation and offers faster processing speed.

Abstract: Aimed at the defect of high power consumption,high cost and low precision of the traditional vibration monitoring sensor node,a vibration monitoring node based on wireless sensor network was designed.Because CC2530 combines the RF module and high performance chip 8051,and applies to the solution of low power consumption,the node took CC2530 as the core,used high precision three axis accelerometer ADXL345 collecting vibration data,applied IAR for the design of the Zigbee protocol stack to achieve the nodes in ad hoc network with C language.The experiments show that the node has good performance for monitoring,and safe and reliable wireless communication function.

Abstract: Magnetic levitating bearing is nonlinear and uncertainty,and the traditional PID control and fuzzy PID control algorithm is not good enough to meet the requirements of the magnetic levitating bearing control systemSo,based on the idea of variable universe method,this paper puts forward the theory of variable universe fuzzy PID algorithm——by selecting the right expansion factor to realize domain contraction,it can increase the fuzzy control rules,so as to improve the control precisionThe simulation analysis result of the magnetic levitating bearing control system based on SIMULINK show that the variable universe fuzzy PID algorithm improve the control accuracy,the dynamic performance and the static performance

Abstract: This paper researched the technique of chlorophyll a and turbidity detection,and its realityThe sensor was based on fluorescence inducement and dispersion method,and can be used to observe some ocean factorsThe design was validated by the simulation that it can measure weak optic signalThe simulation result is also the foundation of system debugging

Abstract: In engineering measurement signals,the vibration acceleration signal contains direct component and interference noise.These signal components lead to the accumulation of error after the integral,which may make a complete distortion of the results.On the analysis of the influence the trend term having on software integral,the frequency domain integral algorithm based on the frequency domain low-pass and band-pass filter was put forward.Through validation examples,this method is very well used to remove the low frequency trend term and the high frequency interference noise.

Abstract: Displacement information was got from the acceleration signals by the second-order integration filter.The simulation signal was used to verify the correctness of the algorithm,and the experimental cost was reduced by the method.In order to improve the stability and the anti-noise ability of the system,the acceleration was processed by removing the average and wavelet transform before integration.Finally,the acceleration was measured by the inertial measurement unit XW-IMU5250 and more precise displacement data can be acquired from the algorithm.

Abstract: This paper introduced the design of an intelligent electric valve controllerThe hardware circuits such as the electric valve position detection,remote control signal conversion,parameter tuning and sensitivity adjustment,valve motor drive and the keyboard,opening display were designedThe system PID algorithm was designed and validated in the establishment of mathematical model,at the same time the corresponding software programs were designedThese designs implement to control the electric valve actuator on real-time and guarantee the operation reliability and accuracyThe communication was realized between the work field and remote control center by RS-485The device can monitor and operate on real-time in the configuration environment,which can achieve operations of digital,intelligent,networked and remoteSo as to facilitate the operation,broaden the scope of the valve using environment,and cost savingsConfiguration experimental results show that the device is with a good linear relationship,short action time,high accuracy and friendly interface and the error is less than 03%

Abstract: The current data aggregation algorithms usually do not pay enough attention to the different data throughput of different network layers,so it may cause the data collision during the data transmission or data aggregation.Aimed at this problem,this paper proposed a data aggregation timing control algorithm for reliable transmission,and this adaptive algorithm schedules the waiting time for every node not only based on their position in the network,but also take the different data throughput of every node into account.This paper introduced the compensation latency of MAC layer to reduce effectively data collision.Simulation results show it improves the energy efficiency of reliable transmission network owing to using lossless data aggregation.

Abstract: This paper introduced a kind of smart meter's design of low power consumption based on high precision electric power sensor AD7953 and MCU MSP430Based on measured principle and combined with low power consumption scheme designed watt-hour meterMCU controlled the power real-time monitoring,preventing electricity-stolen monitoring,multi-rate,maximum demand measurement,data storage,and power protection freezing,the event log,etcIt used nRF905 module as communications nodes and RS-485 interface communicating with PC,constituted wireless meter reading systemThe paper expounded the meter calibration methods of ADE7953,and tested the calibrated meterTest results show that the electric meter is precise,the operation is convenient,and the communication is stableIt has great practical and developed value

Abstract: Considering the infrared detector's demand for the absorption material,the design and text of black silicon is present as the surface layer for its high absorption of part wavelength of infrared light.This paper researched on black silicon's absorption rate for different wavelengths of infrared light.According to the IR basic theory,feasibility and compatibility iqn MEMS process,a type of MEMS thermopile infrared detector was designed with the two materials in thermocouple of detector placed on the single layer of SiO2 membrane vertically.Besides,the detector took polysilicon on SiO2 as the substrate to release devise by using XeF2 front dry etching in order to solve the difficulty when releasing the Si substrate and the high cost of SOI.The method can improve the performance of detector and reduce the cost.

Abstract: This paper designed an intelligent field calibrator based on μC/OS-Ⅱ real-time operating system and ARM microprocessor.The calibrator integrated kinds of connection rules and calibration logic by adopting the modular design approach and all-digital simulation method.It simulated the breakers,voltages and currents of actual line through the relays,three-phase programmable voltage sources and current sources respectively.The calibrator sampled the actions and time sequences of the backup power auto-switch-on device,through whose output channels.Applying the preset rule and calibration logic,the calibrator generated the action signals in sequence to the backup power auto-switch-on device as well to calibrate its work state.A detailed description about the system architecture,the key hardware design,and the implementation of embedded software were presented.Currently,the designed calibrator has been put into practice in field testing applications.The test results show that the calibrator has good functionality and performance,friendly interface,stable work,and can meet the field calibration requirements.

Abstract: Through the study of the principles of image acquisition,a FPGA-based image acquisition module design was completed.The decoding,storage and display of the images were accomplished by the control module,the control module,the effective data extraction module,DDR control module,image de-interlacing and frame rate enhancement module and display module designed in the FPGA.The design of the whole system were implemented in VHDL on the tool of ISE10.1 and validated by the hardware platform which was designed based on the chip of XC4VSX25 manufactured in Xilinx.Experimental results show that the image acquisition module is effective,and can display the image captured by the camera in real-time.

Abstract: The purpose of the multisensor data fusion algorithm based on adaptive weighted and the decision rules of indoor environmental quality composite index fusion algorithm based on fuzzy set theory was to solve the errors and the uncertainty problem of information processing in indoor environmental quality monitoring and control system.Indoor environmental quality rating and evaluation were based on the researches of the data collected from indoor and the rating and evaluation results would trigger the activities of the monitor.The experiment results show that this data fusion algorithm and the decision rules is correct,this construction of the indoor environmental quality monitoring system has a high accuracy.

Abstract: In view of the current technical condition of photovoltaic(PV)power station that using RS-485 bus for communication,this paper presented monitoring sytem for PV power station based on CAN bus.Combined with CAN bus technology,the paper introduced the hardware design based on TMS320F2407 as the lower computer controller,the design of CAN communication protocol and the program process of software design.The system solved the problems of former PV power station monitoring system,such as having poor real-time,the lower automatic level,containing few number of node,the small anti-jamming capability.And it obtains good effects in the experiment.

Abstract: A weak magnetic field sensor based on GMI effect was developed by using Co66.3Fe3.7Si12B18 amorphous ribbon annealed by pulsed current.The operation principle of the sensor was analyzed.The signal processing circuit was designed and the measurement range and linearity of the sensor were performed.The sensor can be used in the weak magnetic measurement field including earth magnetic field and environmental magnetic field.

Abstract: Aimed at the current status of water level monitoring and measurement of river,the water level monitoring and measurement system of river was proposed,utilizing both ZigBee technology and ultrasonic waves measurement technology.In the system,the ultrasonic waves measurement modules were combined with wireless sensor nodal points.The system has broad application prospects,because the wireless sensors are small,easy to expand,and of low power comsumption.

Abstract: This paper simply described the features and function of LabVIEW software which was virtual instrument platform and intelligent instrument.Data acquistion system controlled by computer was developed based on the serial communication of LabVIEW and intelligent instrument.It used LabVIEW's strong and powerful handing data and display carried out a real-time processing,analyses and display and improves the performance of intelligent instrument to a great extent.It described its specific application in the torque test bed of oil pump,and the speed,torque and power of pump were collected,and it achieved satisfactory results.

Abstract: In automatic rail guided system for Intelligent small car,automatic rail guidance,obstacle avoidance and car speed detection are three fundamental functions.The photoelectricity sensors array for path rail detection were made by optodiodes and optoresisters.The function of detecting speed and obstacle was realized by reflective optoelectric sensors FS0359F.The MCU STC12C5A60S2 were used as central control unit,which output PWM signals to adjust the speed of driving motors and control the moving direction of small car by road environment and car speed information.The experiments show that the automatic rail guided control system has realized automatic moving control with rail guidance and obstacle avoiding for the intelligent small car.It is a system of low cost,small size and stable fuction.

Abstract: Temperature error is in a large proportion of the total error in the micro-capacitive acceleration sensor, so the quality of temperature compensation has a direct impact on the measurement accuracy of the sensor. Based on the analysis of changes of acceleration sensor SD1221 affected by temperature, a linear forecast amendment method was put forward. Actual tests show that the method can reduce the impact of temperature changes effectively, simplify the amendment process and meet the requirements in a wide temperature range.

Abstract: Semiconductor refrigerator has the features of two-way work,no vibration,no noise,high reliability,easy to install,small thermal inertia,etc.The system included the semiconductor chip,high precision temperature detection,thyristor phase control and PID automatic control theory,constituted a high-precision temperature control system.The system temperature control accuracy is 0.1 ℃,has good prospects.

Abstract: Besides the disturbing factors present in the objective environment,water addition in sintering process has large time delay and the complex features of the model result to the traditional control methods were difficult to achieve the desired control effectDue to the extra tuning knobs compare with traditional PID controller,fractional order PIλDu controllers were expected that better control performance can be achievedThe digital Implementation of fractional calculus was given based on the analysis on fractional calculus,the fractional order PIλDu controllers were instead of traditional PID controller,combined with Fuzzy control,proposed a control method for water addition in sintering process for the first time,which used fuzzy logic to adjust control parameters of fractional order PIλDu controllersMatlab/simulink was used to achive modeling and simulationSimulation results show the validity of the proposed control strategy,can achieve better control performance

Abstract: This paper designed a GMR-based gear sensor.The sensor included three parts,a GMR(giant magneto-resistance) sensor element,a magnet placed behind the sensor,and a circuit for processing the sensor output,which was a reflection of the magnetic field signals generated from the gear rotation.Ansoft Maxwell software was used to simulate and analyze the magnetic field signals generated on the GMR sensor element by the gear rotation,and then the experiments were carried out to confirm that the sensor output was in agreement with the simulated results.The GMR-based gear sensor has excellent characters of wide bandwidth,high sensitivity,small size,and can realize measurement of the rotation speed with the air gap more than 4 mm.The GMR-based gear sensor is an ideal replacement for the traditional gear speed sensors,which have to be placed closely to the gear.

Abstract: To solve the problem of difficult to set up the network,high cost and restricted scope in existing cable water environment monitoring system,a new system based on Zigbee wireless sensor networks was proposed.The system was constructed on Zigbee wireless sensor networks and 3G network,sensor nodes for data acquisition were arranged in the monitoring position,multiple sensor nodes construct a wireless network,the gateway node collect data and transmit to remote data management center.The experimental results show that the proposed system is simple,stable and reliable.The system is suitable for wide range of ream-time monitoring of water environment.

Abstract: A integrated transceiver type ultrasonic wind speed and direction measurement system based on improved time difference method was designed.System hardware adopted modular design and took ARM chip LPC2136 as the core,which consists of six modules,including ultrasonic transceiver,signal conditioning,data quantization,human interface,system power and clock,and network communication according to the function.Furthermore,time frame to receiving signal and wavelet transform were adopted to accurately locate the ultrasonic propagation time in the program.Some functions were well realized in the system,such as real-time display of parameter,precise measurment of wind speed and wind direction,and flexible communication with PC.

Abstract: Considering data display requirement in the electronic measurement field,this paper propsed a design resolution of data acquisition and VGA(video graphics array)waves display based on FPGA(field programmable gate array).This paper used a single core chip of StratixII series FPGA,achieved three main control modules,data acquisition A/D conversion,double port RAM storage and VGA display,which realized the system function of data acquisition and display with external signal regulation circuit,A/D and D/A converters.The design has the characteristic of simple periphery circuit,stable performance,high reliability and easy expansion function.Signal waveforms can be displayed clearly according to the experimental results.

Abstract: This paper studied and investigated on the online monitoring of transformer winding temperature,designed a temperature sensor using fiber brig grating,and built a transformer winding online monitoring system on the volume phase grating and embedded microcontroller STM32.The system has features of high precision and easy composition of the sensor network.In the experiment,a second-class standard mercury thermometer was used to compare with the temperature monitoring system.The results show that the temperature monitoring system has good accuracy and stability.The sensitivity of the fiber temperature is 10.2 pm/℃,the stability of the transformer winding online monitoring system is better than 0.1℃,which provides a new and reliable means of real-time temperature monitoring of power transformers.

Abstract: In fixed step size LMS algorithm,there is an inconsistency between the fast algorithm convergence and the low steady state error.Variable step size LMS algorithm can resolve this problem.On the basis of analysis of two kinds of variable step size LMS algorithm,an improved LMS adaptive algorithm was proposed.And the filter method has been tested and adopted in MATLAB and DSP-SZ-EPP5402.Experiments show that the realization method can effectively resolve inconsistency between the fast algorithm convergence and the low steady state error.

Abstract: A kind of sapphire fiber blackbody cavity temperature sensor which was sprayed by ZrO2 film was calibrated.In this measruement system,hydrogen-oxygen gas flame welding machine was used as heat,Modline 3 infrared themometer was the standard sensor,data acquisition card(PCI20612)collected both of output of the calibrated sensor and Modline3.K was obstained by comparison.Experiments demonstrate the feasibility of this program,the results show K is 98.578×106(V·m2/W),and the T-V curve is presented.The calibration system is convenience and practical.