小型绝对式双码盘光电轴角编码器

介绍了小型绝对式双码盘光电轴角编码器的结构设计、工作原理及两码盘间的校正原理．     

增量式光电编码器信号处理、显示电路的设计

以增量式光电编码器在分布式光度计中应用为例，详细介绍了光电编码器信号处理和显示电路设计，为光电编码器可靠使用提供简单有效的方法。     

增量式光电编码器信号处理,显示电路的设计

以弱量式光电编码器在分布式光度计中应用为例，详细介绍了光电编码器信号处理和显示电路设计，为光电编码器可靠使用提供简单有效的方法。     

光电编码技术在电梯控制中应用

叙述光电编码器的结构、原理、光电编码器元件应用的条件及在电梯控制中的应用，故障分析。     

激光制导测量机器人定位算法研究

对激光制导测量机器人的定位理论进行了研究,分析了光电编码器测距原理,提出了基于此原理的激光制导测量机器人定位方法;研究了机器人的直线运动和圆弧运动定位算法;给定机器人的初始位姿,推导出了下一时刻的位姿,并实时反馈给控制系统,控制机器人准确定位;研制了激光制导测量机器人试验样机,能够实现在被测工件CAD模型的控制下,自动完成对工件的高精度测量.实验结果显示本定位算法理论是正确有效的.     

光电编码器电路原理分析

本文以光电编码器为例介绍了数控检测系统的种类,详细分析了光电编码器的结构原理。分析SZLF-102．4BM—C05L光电脉冲编码器电路原理,把机械转角通过光电转换元件将变化的光信号转换成近似正弦波的电信号,然后由放大电路、整形电路、经频率——电压变换器变成正比于频率的电压,作为速度反馈信号,供给速度控制单元,进行速度调节。     

ROBOCUP小型机器人串级控制系统的实现

 机器人足球是集视觉处理技术、无线通讯技术、电机控制技术、智能决策对象等多种技术的综合系统,是当前人工智能和机器人领域的研究热点之一．简要介绍了ROBOCUP小型机器人足球系统框架,对小车子系统的电机控制电路部分引入串级控制,通过DSP芯片及传感元件对电机速度和电机电流实现双闭环控制,提高了机器人速度响应的性能指标．     

细光栅自成像光电轴角编码器

根据光栅自成像原理,由波长为690nm的半导体激光器、准直透镜、光电接收元件和光栅等组成细光栅自成像光学系统,得到高质量的莫尔条纹信号。以此信号为基础的细光栅光电轴角编码器具有精度高、频响高、易于实现小型化等优点。该技术是提高光电轴角编码器测角精度和环境适应性的一种新的实用的解决途径。     

压电陶瓷驱动并联微动机器人的研究

介绍了集精密机械技术，精密测试技术和智能反馈技术于一体的压电陶瓷驱动六自由度并联微机机器人。该微动机器人采用以压电陶瓷为驱动元件和弹性支撑并联机器人的结构形式，具有高频响、高分辨率，结构紧凑，铡度大等优点，实现了机构，驱动、检测一体化，达到纳米级定位精度，是微驱动技术与并联机器人交叉结合的成功尝试。     

角加速度作用下编码器细分误差分析方法的研究

分析了编码器细分误差产生的原因,建立了角加速度作用下编码器光电信号模型,通过计算机模拟仿真,提出了加速度作用下编码器光电信号参数特征的提取方法及其适用条件.     

Effect of Permeable Crystalline Material on Steel Reinforcement Corrosion of Concrete

Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.     

The Research and Application About "Dry Peeling Off" Technology for Airplane Surface Paint Layer

In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.     

Quality Study of Honeycomb Core Shaping Without Wax Stabilization

Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.     

In-process thermal treatment of polylactic acid in fused deposition modelling

Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.     

Investigation of the Corrosion Behaviors of HVOF-Sprayed Carbide Cernet Coatings in Molten Al-Zn-Si Alloy Bath

In continuous hot-dip galvanization process the corrosion and chemical stability of the sink roll in the galvanizing bath are important problem which effects on the quality and productivity. In order to protect the sink roll the carbide cermet and/or ceramic coatings were deposited on the surface of the sink roll. The WC-, Cr3 C2-cermet coatings were deposited by high velocity oxygen fuel (HVOF) spray, respectively. The coating samples were immersed in molten Zn-alloy containing 50 wt % aluminum at 833 K for 24 hr and 144 hr, respectively. The inter-diffusion and inter-reaction of Zn, Al and elements in coating and corrosion behaviors of these coatings were investigated by XRD, SEM and EPMA etc. The corrosion mechanisms of the carbide cermet coatings and ceramic coatings in molten High Al-Zn-alloy were approached.     

Fundamental study of adhesion of ice to cooling solid surface (Discussion on influence of copper oxide layer on ice adhesion force)

In many situations, ice often adheres to a cooling solid surface, frequently causing serious accidents. It is critical to clarify the mechanism of ice adhesion to the cooling surface in order to prevent ice adhesion. In a past study, the shearing stresses of two kinds of test plates with a copper surface having the higher thermal conductivity were measured. The shearing stress corresponds to ice adhesion force. Both shearing stresses were significantly different; however, the cause remains unclear.Therefore, the present study focuses on an oxide layer as the main factor causing the difference of both shearing stresses; the influence of the oxide layer formed on shearing stress was discussed. And in the removal and reformation processes of the oxide layer, the time variation of the shearing stress was clarified. Moreover, the relationship between the state of the copper surface and the shearing stress was also clarified by surface analysis.     

重塑标准推行格局 推动LED照明的普及（英文）

正When you are enjoying the green,energy-saving and healthy lighting of IKEA LED luminaire,you may not realize that most of IKEA’s LED bulbs are produced by the LED luminaire smart manufacturing system of Hangzhou Zhongwei Photoelectricity CO.,LTD(ZVISION).No longer enclosed in the laboratory,the product standards are brought into the factory workshop and even to the entire production process.Thus,the standards are promoted and applied in a favorable way by enterprises,benefitting consumers with high quality products.     

Chinese Experts Contribute to ISO＇s New Toy Standards

正The international standard,ISO 8124-6,Safety of toys–Part 6:Certain phthalate esters in toys and children’s products,was officially issued by ISO worldwide on August 15.It was the first time for Chinese experts to lead the ISO standard development in toys industry.The standard was drafted by a group of Chinese experts from SAC/TC for toys and relevant Chinese departments and finally completed by a dedicated international group of experts.ISO 8124-6 makes a substantive breakthrough in the aspects of the scope of toys,limitation of plasticizer types,control of test cost,accuracy of test,operation convenience,etc.,offering the operational guidance for toy manufactures and testing laboratories.     

中国质量(北京)大会(英文)

正Themed on"quality,innovation,development",the first China Quality Conference(Beijing)was held in the Great Hall of the People on September 15.Chinese Premier Li Keqiang delivered an important speech at the conference.State Councilor Yang Jing and Wang Yong attended the conference with over 600 domestic and international representatives from foreign,regional and international quality organizations     

National Working Meeting on Land and Resources Standardization

正The National Working Meeting on Land and Resources Standardization was held in Beijing on July 15,2014.Wang Min,the Deputy-Minister of the Ministry of Land and Resources,and Yin Minghan,the Chief-Engineer of SAC addressed the meeting.Representatives from relevant competent departments and technical committees were present.The meeting aims to summarize work,discuss existing problems and make clear working thoughts,promoting standardization work of land and resources to a new level.Wang Min pointed out that the standardization work of land and resources should be centered on the basic principles of"protecting land and resources dutifully,intensively and economically utilizing land and resources,and making all-out efforts to safeguard the public’s rights and interests",highlighted the