In order to solve existing problems of the traditional stamping production line, i.e.lower automation degree, lower ef-ficiency and higher energy consumption, the design and development of field network configuration and distributed monitoring system for full automatic stamping production line were presented.This system was composed of several sets of precision stamping machines in connection, and an industrial robot was driven by high speed servo motor to implement materials palleting, feeding and automatic se-quencing in work shifts.Synchronization, coordination and monitoring of movements between precision stamping machnes and industrial robot by field bus control to implement full automation of the stamping producton line.The system was applied of double-layer industrial network design so that the real-time data communication based on underlying Cclink field bus guaranteed a rapid and reliable data transmission to implement distributed data sampling and monitoring, while the upper layer TCP/IP networking realized the large quanti-ties of data transmission to facilitate remote monitoring, system integration and unified information management.The testing results show that the monitoring system is able not only to have functions of to capture, to display and to store machining data on the stamping pro-duction line in real time, but also to inquire a historical data on the machining process, to monitor and manage the process data and to give pre-warning on possible failure in fault dignosis.

In view of the existed problems of information secrecy carried by QR code and anti-counterfeiting identifica-tion in electronic policy system ,a method was proposed in this paper based on AES encryption algorithm combined with ran-domly generated initial key on the original information encryption to generate QR code .Then a digital watermark was embed-ded into the QR code ,which was ground on Logistic chaotic mapping algorithm .Test and analysis results showed that the design of the encryption and digital watermarking embedding algorithm is was feasible and maneuverable ,improved the elec-tronic policy QR code information safety and security performance .

With the QR code technology being widely applied in electronic ticketing, bank checks, E-commerce and other fields, many safety problems have emerged, such as information leakage and data tampering. Based on Visual Studio 2008 c platform, the method with Rijndael random variable and random keys secondary Rijndael encryption protection is proposed using Rijndael encryption and SHA512 digital signature technology. This paper presents a novel design of information security before generating QR code. The encryption principle, algorithm and implementation, safety performance of the proposed method are discussed. Also corresponding testing and analysis are provided to verify the feasibility of the proposed algorithm. Results have proved that the information safety performance of QR code is greatly increased with the encryption algorithm, the efficient management and the multiple- protection to a key. This just causes a smaller increase in the content of the encryption data than those of the raw data.

为了更好地恢复被高密度椒盐噪声污染的图像,在传统的自适应中值滤波算法的基础上提出了一种改进的自适应滤波算法.该算法将3×3矩形滤波窗口内极值点视为可疑噪声点,对可疑噪声点自适应调节滤波窗口大小进一步判断是否为噪声点;将噪声点区分为低密度噪声区噪声点和高密度噪声区噪声点,并分别用改进后的中值滤波算法、自适应修正后均值滤波算法处理,信号点保持不变.仿真结果表明,该算法处理速度快并且能够有效恢复被椒盐噪声(密度达80％)污染的图像,在去噪的同时能够很好地保护图像的细节.

A proposed intelligent data acquisition terminal is presented to improve student nutrition meal’ s safety and quality ,which could monitor each critical point of the whole nutrition meal production chain’s on line.ARM S3C6410 processor was chosen as the core of the hardware structure , which could be extended by all kinds of interface .The terminal could collect all kinds of status information of the crit-ical point on the food processing line , such as producing scene information , the humiture information of raw and semi-finished food materials .The necessary function of the terminal ’ s software was realized by using the ARM-Linux embedded technology .The measurement results indicate that the terminal is sim-ple in structure;that the terminal ’ s hardware and software could be reconfigurated according to modules;that the all of the process information could be collected ,displayed and stored on line .The application of this terminal will establish a good foundation for tracing the process of nutrition meal production chain and ensuring the safety of nutritional meals .

An image preprocessing algorithm for(quick response code) QR code has been proposed.Scanning the distorted QR code which shooted from any angle horizontal and vertical to obtain the center which the length of the black and white module accord with the proportion 1∶ 1∶ 3∶ 1∶ 1 roughly.Fitting a straight line baseed on the the center of a series of point,the intersects as the center of the findpattern are gotten.Using morphological operations to remove the irrelevant details in the background,the QR code according to the relation of the three center of the findpattern is segmented and corrected.The simulation results showed that the proposed algorithm can remove the irrelevant details of the QR code.It also can locate the findpattern and segment the distorted QR code from the complex background quickly and accurately,it can correction the code geometricly after segment.

Experiments with a gas–solids dense phase pneumatic pipe flow have been undertaken: (1) to determine the average heat transfer coefficient between a heated wall and a gas–solids dense phase flow; (2) to investigate the heat transfer mechanisms of pneumatically conveyed dense phase flow in detail as the system operates by injecting heat energy into the pipeline to heat the pipe section, as a result, to heat the dense phase gas–solids׳ plugs, and measuring the resultant change in solids׳ plug and heated wall׳s temperatures. The experimental results suggest that the average heat transfer coefficient between the heated wall and the gas–solids dense flow displays an approximately linear relationship with the solids loading ratio. A larger solids׳ loading ratio results in a higher average heat transfer coefficient. The results have been compared with those of Moriyama et al. although the overlap of data ranges is limited. Experimental results also indicate that the inner wall temperature is able to reflect the energy change when each solids׳ plug is being through the heated region. The calculated gradient change of the outer wall temperature–time history T1 measured is consistent with the fluctuation of the wavering of the inner wall temperature along with the present of solids׳ plugs in the heated region.

The in-line measurement of solids mass flow rate in a prototype industrial scale pneumatic conveying pipeline by a thermal method has been investigated over a range of dilute conveying conditions. A thermal method of determining solids mass flow rate should, in principle, be capable of achieving a reliable measurement regardless of; inhomogeneities in solids' distribution, irregularities in velocity profile and variations in particle size or shape. The instrument described in this article operates by the injection of heat energy into the pipeline by way of a heated section and measuring the resultant change in solids' temperature using infrared sensors. Initial results from the thermal instrument are compared with measurements from a gain in weight system showing good correlation. The importance of sensor window condition and temperature on measurement is discussed.

针对轿车减震器产品在生产线末端自动测试和性能自动判别方面的迫切需求,研究开发了基于微机控制的减震器衰减力测试系统.系统通过在线分析评价示功特性曲线的饱满程度和特征来判断减震器性能的优劣,从而在生产装配线末端剔除不合格的减震器.重点讨论了减震器示功特性曲线的自动评价判断方法和依赖于生产工艺过程的判据生成方式,并对生产现场试验数据进行分析和识别,验证了评价判断算法的有效性和实时性.

This paper applies Advantech PCI-1220U motion control card as the interface of the servo control to carry out the comprehensive performance test of the electric power steering(EPS) system.Servo motor was taken as a load of the EPS testing system.The industrial computer manipulates the servo motor to load to the EPS testing system via the interface.The test results show that the PCI-1220U multi-function motion control card is able to meet control requirements of the two-axis servo motor to realize the real-time motion control based on the VB6.0 software platform.

In order to solve the problems of the measurement of gas-solid two-phase flow's parameters and study new measurement methods.A comprehensive experimental platform for dynamic testing of the gas-solid two-phase flow based on two-tier network systems between the CAN field bus and Ethernet was designed,which on the basis of conventional measurement methods.A appropriate drive unit was selected by calculating the pipeline pressure drop in dense phase and static pressure conditions,which can research on gas-solid two-phase flow within different transportation methods.The experimental platform could test the parameters,monitor the condition and simulate the state of multiphase flow.The gas-solid two-phase flow multiparameter dynamic testing in the course of the study of new test methods and the experiment contrast calibration within a certain measure rang could be made.

Introduced the principle of the solid surface laser correlate real-time speed measurement,and in accordance with this principle,the paper introduce a real-time speed measurement system for trans-mission belt based on laser correlation principle and LabWindows/CVI development platform,including the LabWindows/CVI platform,data acquisition,data processing,the data show updates,measurement parameters correcting in module design.the actual test show that the feasibility and practicality of the system are valid.

This paper applied Advantech PCI-1716 multi-function data collection card and 32 bit dynamic link library(DLL),to realize data acquisition drive and to control the PCI-1716 card using VB programming platform.According to requirements of the system,the straightening system for torsion bar of automobile electric power stirring is able to collect data of each torsion bar in rotating process on line,to analyze and calculate a offset,finally to conduct a straightening action to the torsion bar.

An application of the PCI-1716 data acquisition card in the performance testing of the electric power steering system is investigated and developed.In the test system,all online data are collected with PCI_1716 and a 32-bit DLL driver on the platform of Microsoft Visual Basic.This makes the online data logging,processing and storing available.Performance tests of the electric power steering system including the function testing,input/output feature,the current feature of the steering assist motor and unloaded rotation torque can be conducted.PCI-1716 data acquisition card used software timer to control data acquisition process and trigger A/D conversion,input voltage range of all the acquisition channel is set to-10V~+10V.

Shock absorber is a key element of the auto shock-absorber system,whose characteristics directly influence the comfortability and stability of the car body' s performance.A novel design and implementation of the performance test system for the shock absorber is proposed to satisfy the urgent demands for automation,online and quickly testing the damping force of the shock absorber.The system takes an industrial control computer as the control core,a sine excitation is generated by converting the rotary motion of a servo motor into a straight reciprocating motion of the absorber via the crank link mechanism,then the piston of the absorber is stretched or compressed,to implement online tests of the absorber with a damping force sensor.

An accurate, reliable, on-line, continuous and non-invasive measurement of solids’ mass flow rate in pneumatic conveying pipelines has been a technically challenging area, which becomes increasingly significant to achieve efficient utilization of energy and raw materials and to reduce waste. Energy and environmental regulation and legislation, and efficiency and waste reduction are two most powerful drivers in the academic research and industrial applications for solids’ mass flow meters. In this paper, a review is presented on the recent measurement techniques of solids’ mass flow rate measurement in pneumatic conveying systems. On basic principle and configuration of each technique, performances and limitations of these techniques in industrial applications are analyzed and compared from different views to demonstrate the recent developments in the field and the possible approaches which may provide solutions to the solids’ mass flow measurement problem.

Mass and energy balances are required in power generation, chemical, pharmaceutical, food and commodity transfer processes in order to achieve efficient utilization of energy and raw materials. There is a need for accurate, reliable, on-line, continuous and non-invasive measurement of solids' mass flow rate in many industrial processes mentioned above. Thermal flowmeters, in theory, provide a true indication of the mass flow of solids in pneumatic conveying pipelines.A complicated heat transfer between a pipe wall and a gas-solid flow in a conveying pipeline inevitably takes place in a thermal solids' mass flow measurement process. A study of heat transfer mechanisms to pneumatically conveyed gas-solid dense phase flow as a means to mass flow rate measurement has been conducted experimentally and numerically to evaluate the heat transfer coefficient between the hot wall and the gas-solid dense phase flow. The prediction of the heat transfer coefficient is compared with the experimental findings. It was found that the heat transfer coefficient between the pipe wall and the gas-solid dense flow is a function of solids loading ratio. Increasing the gas stream velocity significantly augments the heat transfer between the hot wall and the gas-solid dense phase flow. (C) 2010 Elsevier B.V. All rights reserved.

On-line mass flow measurement of particulate solids in pneumatic conveying pipeline is a technically challenging area, where mass flow measurement presents a range of problems. These problems are not normally relevant to a single phase flow, but are always involved in gas–solids two-phase flows, like inhomogeneous distribution of solids over the pipe cross section, irregular velocity profiles, variations in particle size, moisture content, and deposition of fine particles on the inner wall of the pipeline. These variables may affect the response of a solids flow meter in ill-defined ways. All of these make the design and the calibration of solids’ mass flowmeter more difficult. Based on a review of non-invasive mass flow measurements of particulate solids, this paper summarizes and highlights several key issues, which often rely on structures of sensors or measurement methods, in indirect mass flow metering of pneumatically conveyed solids. They are: (i) spatial filtering effect; (ii) averaging effect; (iii) measurement resolution and sensitivity of array structures in tomography sensors.

This paper describes the design, computer simulation and experimental evaluation of a novel measurement system that has been recently developed for the measurement of mass flow rate of particles in a gravity chute convey pipeline. Comprehensive computer simulation and numerical calculations show that the proposed method with laser-sensing array is theoretically correct and the programmed algorithm is effective. This method has been characterized by dynamic testing, real time and continuous measurements. The results of simulation and experiment have demonstrated that the multi-laser source fan-shaped geometry can be an effective approach to interrogate the mass flow rate of particles over the pipe cross-section. The mass flow rate of particles derived from extinction principle has shown a good agreement with the projection sum of light beams and the real mass flow rate.