筒体温度扫描系统在水泥生产中的应用

<正>2010年我公司引入筒体温度扫描系统(简称"扫描系统")对4条窑的筒体温度进行在线监控,通过对扫描系统反馈的信息进行分析,及时采取针对性的调整,稳定了工况,提高了熟料产质量,同时也延长了窑内耐火材料的使用周期。1扫描系统的原理及作用1.1结构原理系统由扫描测温仪、工业控制计算机、通讯接口和窑速传感器四部分组成,扫描测温仪扫描窑体表面辐射的热量,并将其转换为电信号,经通讯接口输入     

扫描电子显微镜的最新应用

扫描电子显微镜是各大专业领域广泛使用的重要研究和分析测试工具。本文对扫描电子显微镜的最新应用,包括在混合计量学、微观尺度三维形面测量、医学和生物学、植物学中的应用,以及用冷冻扫描技术观察燃料电池催化剂油墨微观结构等进行了较系统的论述。     

软质薄膜生产中的牵引扫描

具有优异性能的Battenfeld Gloucester公司的水平牵引扫描振荡器改进了软质薄膜的成型过程。Battenfeld Hnip可以使大多数刻膜机、通风干燥系统和膜测量随机化．这将更好地保证膜的平整和最佳的收卷质量。将没有折过的薄膜与拐角处的拱杆接触可以减少薄膜形成任何皱折的趋势。借鉴Traversanip Vertical的水平牵引扫描振荡器的设计，新的设计采用了一个坚硬的底     

铋甲西林片的薄层色谱扫描定量分析

建立了铋甲西林片中阿莫西林和甲硝唑的薄层色谱扫描定量分析方法 ,考察了展开剂系统和展开温度对两组分色谱分离的影响情况。采用硅胶 GF2 54 - 0 .50 %羧甲基纤维素钠板 ,以甲醇 -氯仿 -二乙胺 -石油醚 (35∶ 40∶ 1 .0∶ 75)为展开剂 ,两主药斑点经紫外灯定位后 ,不经显色可直接进行双波长薄层色谱扫描测定。以随行外标二点法对样品进行了分析 ,阿莫西林和甲硝唑的回收率分别为 99.82 %和 1 0 0 .9% ,RSD<3.3%。     

单帧3D数据建构方法

1 彩色3D图像重建。目前，3D扫描测量系统可将物体的3D数据准确地测出．但物体上的颜色信息却往往难以获取，本文的一个重点研究的问题．就是将扫描系统所测得的3D数据与扫描系统所摄取的彩色照片信息做贴图．使扫描系统能获取准确的3D数据和颜色的信息．彩色3D图像重建是指将摄取的彩色照片信息和3D几何模型     

橡胶加工分析仪研究环氧化天然橡胶的性能

用橡胶加工分析仪对环氧化天然橡胶进行了温度扫描、频率扫描和应变扫描，并和天然橡胶的响应曲线进行了对比。     

环氧复合材料微波扫描修补工艺及力学性能研究

微波加热具有加热速度快、加热均匀等优点,将微波固化技术应用于复合材料的修补,具有巨大的发展前景。针对E51/DDM体系玻璃纤维复合材料的微波扫描快速修补,通过扫描设备对预制缺陷复合材料层合板进行修补,研究了微波扫描修补工艺及修补后试样的力学性能。研究结果表明,300mA输入直流电流所对应的固化工艺具有较高的固化效率,同时固化制品具有良好的力学性能,最终确定此工艺为微波扫描修补工艺;当修补试样未加覆盖外层时,修补后试样的拉伸性能保持率较高,弯曲性能保持率较低,拉伸强度及模量保持率分别为89%和92.7%,修补面加载与背面加载的弯曲强度保持率分别为74.9%和77.5%;添加覆盖外层后,修补试样的拉伸及弯曲性能均得到提高,拉伸强度及模量保持率分别提高为98.7%和95.4%,修补面加载与背面加载的弯曲强度保持率分别提高为96%和94.4%;与热固化修补相比,微波扫描修补能节省70%左右的修补时间,具有更高的修补效率。     

除尘设备叶片的三维扫描和3D打印优化

以有内部结构和曲面的除尘设备叶片为例,以三维扫描仪扫描图像为基础,先用Power Scan作系统标定,然后扫描,之后用Geomagic对模型进行优化处理,导出STL文件,在idea Maker中对模型作旋转、分割进行3D打印。在模型的扫描与打印过程中,会产生一系列的缺陷,针对扫描与打印过程中的缺陷进行优化分析,并最终获得合理的模型。     

新研究表明耳朵的形状可用于身份识别

一项新研究表明,未来的机场可通过耳朵的形状识别乘客身份。 在最近举行的第四届国际生物识别大会上,英国南安普敦大学电子与计算机科学学院的教授马克·尼克松称,每个人耳朵的形状都是独一无二的,他们据此研发出了一套扫描耳朵形状的系统,并测试了252幅不同的耳朵图像。研究发现,耳朵扫描系统能将扫描结果与之前已建好的耳朵形状数据库进行比对,由此可以识别人的身份,准确率高达99％。     

蔡司CIMT机器介绍

MICURA测量机已成为紧凑机型的标杆，为当前工业领域的尚精度需求提供了绝佳的解决方案。配符灵动高效的连续扫描测头系统VASTXTgold及Nayigator领航者扫描技术，     

南海盛开号浮式储油装置外输管线扫线系统改造

陆丰13-1油田的浮式储油装置南海盛开号上的外输扫线系统自从油田投产以来一直采用柴油作为扫线介质,造成了柴油的巨大浪费,增加了南海盛开号的操作费用,同时也不符合国家节约能源的政策,通过对原始的工艺进行分析,提出了利用浮式储油装置FSOU上的经过处理的锅炉尾气作为扫线介质的技术方案,并成功地应用与该储油装置上,取得了良好的运行效果和经济效益。     

红外回转窑燃烧胴体温度监测系统的设计与实现

采用红外扫描系统对回转窑燃烧胴体温度进行实时监测的周期较长,所得温度场数据量很大,直接进行传输,效率较低且易出错。为此设计红外回转窑燃烧胴体温度监测系统,介绍系统的构成和原理;采用基于LZ77数据压缩算法的程序对回转窑温度场数据进行传输,并使解压后的数据与原始温度场数据保持一致;同时,设计并实现了工业窑炉燃烧过程的监测界面,包括燃烧过程中各种气体浓度、温度场数据等信息。实践证明:该系统达到了设计要求。     

Toughening‐modified epoxy‐amine system: Cure kinetics,mechanical behavior,and shape memory performances

Shape memory epoxy resins are derived on reacting E51 with triethylenetetramine in presence of the toughening agent polypropylene glycol diglycidyl ether (PPGDGE). The curing behaviors are studied with differential scanning calorimetry. The toughening system shows a decrease in activation energy. ?esták–Berggren model is utilized to establish the kinetic equations. The fitting results prove that the equations can well describe the reactions. Tensile tests and dynamic mechanical analysis are used to analyze mechanical performances and thermodynamics. Shape memory properties are characterized by fold‐deploy tests. The elongation at break increases as the concentration of PPGDGE increases. The toughening materials have lower glass transition temperature (T_g). The fixable ratios of all systems are greater than 99.5%. The shape recovery time decreases with increasing the PPGDGE concentration. The optimal system can fully recover its original shape in about 2 min at T_g + 30°C, and exhibit the maximum fold‐deploy cycles as 13 cycles. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40853.     

蒸馏塔/填料塔故障现象的模拟和诊断

A digitally controlled three-dimensional gamma-scanning apparatus was developed and used to troubleshoot distillation column in the present investigation. In a 140mm(ID) model colum, various malfunctional phenomena,both rate and process related conditions and structural problems, which may be frequently encountered in the operation of tray and packing columns, were experimentally simulated and tested with the developed scanning system. The experimental results showed that the scanning spectra can fairly reflect the simulated phenomena. The salient feature of the scanning apparatus lies in that it integrates the so called grid scan and computer-assisted tomography scan in a single system. It was confirmed that the gamma-scanning technique can serve as an important on-line troubleshooting and maintenance tool.     

Effect of laser scanning speed on geometrical features of Nd:YAG laser machined holes in thin silicon nitride substrate

0.5 mm thick Silicon nitride (Si₃N₄) substrates with MgO-Y₂O₃ additives were employed for hole machining study with a Nd:YAG two-dimensional laser machining (cutting) system. The effects of laser scanning speed on features of the machined holes such as hole diameter, hole circularity, taper angle, heat affected zone (HAZ), recast layer, and micro-cracks were studied. The results show that the diameters at the front side are larger than the back side for all holes machined at different spot scanning speed. The taper angle of the machined holes decreases, while the hole circularity increases with the increase of the spot scanning speed. In addition, the heat-affected-zone (HAZ) was observed clearly around the back side of drilled holes, whose area decreases with the increase of the laser spot scanning speed. The result shows that the HAZ is the largest when the laser scanning speed is 20 mm/min. Nevertheless, the machined hole did not completely cross through the thickness of the substrate when the laser scanning speed was 60 mm/min. To obtain holes with relatively good quality, laser scanning speed should be controlled between 30 mm/min and 50 mm/min.     

计算机辅助不同溶剂系统两次展开最优化分离

用计算机辅助 ,在两组不同溶剂系统中用两次展开技术与计算机扫描技术相结合来优化展开条件 ,取得了比较满意的结果。     

Phase separation of unsaturated polyester resin blended with poly(vinyl acetate)

The behavior of phase separation during the curing reaction of unsaturated polyester (UPE) resin in the presence of low profile additive, that is, poly(vinyl acetate) (PVAc), was studied by low-angle laser light scattering (LALS) and scanning electron microscopy (SEM). The experimental results revealed that the PVAc-rich phase was regularly dispersed in the cured styrene–UPE matrix for styrene–UPE resin blended with 5 wt % of PVAc. As the PVAc content was increased higher than 10 wt %, a cocontinuous PVAc and cured styrene–UPE phase was observed for the cured systems. The LALS observations were carried out in situ at a curing temperature of 100°C; thus, the effect of the rate of exothermic heat released from curing reaction on the morphology of curing system was investigated and reported in this work. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2413–2428, 1999     

邻苯二甲酸二烯丙基酯树脂固化特性的研究

运用示差扫描量热(DSC)法研究了邻苯二甲酸二烯丙基酯(DAP)树脂的固化反应历程。讨论了引发剂对DAP固化特性的影响,并由DSC曲线得到了DAP树脂的固化工艺和动力学参数。通过固化度、FT-IR的测试对DAP树脂在中温条件下的固化情况进行了研究。结果表明:在过氧化二异丙苯(DCP)固化体系中引入BPO可以使DAP树脂在更低温度下引发固化;在BPO、DCP用量均为2%的条件下,确定了体系的凝胶温度、固化温度、后处理温度分别为:100.5℃,124.3℃,137.8℃,表观活化能为129.3 kJ/mol,反应级数为0.950。固化度、FTIR的测试结果表明:DAP树脂在中温条件下可以固化得较完全。     

Changes in the melting temperature and crystal structure of poly(vinylidene fluoride) by knotting

A significant increase in the melting temperature of knotted fibers of poly(vinylidene fluoride) (PVDF) was detected by differential scanning calorimetry. The melting peak partially returned to the original peak after the fibers were unknotted. Knotted PVDF fibers were observed with an optical microscope at crossed‐nicol conditions. The knotted portions of the fibers showed birefringence even above the melting temperature of the fibers before knotting. The dependence of the physical properties of PVDF under applied stress was estimated in order to investigate the influence of knotting. The fracture temperature of PVDF fibers increased with applied stress below 1 MPa and decreased above 10 MPa because the applied stress increased the melting temperature of PVDF crystals, but strong stress mechanically broke the fibers. The X‐ray diffraction patterns of the PVDF fibers under different stress were divided into the peaks of α‐ and β‐phase crystals and amorphous. The peak area of the β‐phase crystal increased and that of the amorphous decreased with applied stress. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013