用CO2激光清洗控制电缆多芯插头霉菌

本文研究了如何运用CO_2激光清洗控制电缆多芯插头霉菌,分析了清洗机理,设计了实验装置,对影响激光清洗效果和实际应用的关键因素进行了重点讨论。分析和实验结果表明,在激光参数选择合适的情况下可实现对霉菌的完全清洗而不会对插头基体造成损伤,激光清洗技术能够安全有效地清除控制电缆多芯插头上生长的霉菌。激光清洗霉菌的机理有:一、激光产生的高温导致霉菌的瞬间汽化和燃烧;二、基体表面在激光辐照射下温度发生急剧变化而产生热膨胀变形导致的加速度及插头座芯孔狭小空间内空气急剧膨胀导致的内外气体之间的巨大压差,将霉菌从插头上除去。     

实用电子装联技术——第十讲 低频电缆及机柜的装联

9 .3　压接型连接器的种类及构成识别压接型连接器的种类9.3.1　XKE系列 -小型圆形耐环境快速连接压接型电连接器这种连接器是按照HB6 112设计的 ,符合MIL -C - 2 6 482规范。该系列电连接器的特点是质量轻、体积小、接触偶密度高、连接分离速度快、密封性能好、品种齐全、可靠性高和具有三防性能 (防盐雾、霉菌、湿热 )。插头和插座的连接为卡扣连接 ,接触偶与电线的连接为压接端接 ,接触偶可单个取出或送入。这种系列的电连接器插头和插座可与XK(第九讲中提到过 )系列插头和插座互配使用。XKE系列电连接器 2 0世纪 70年代未就开始在…     

信息集锦

康泉公司最近推出了一种电热水器专用漏电保护器,当有漏电现象发生时,它可在0.1秒内自动切断电源。据了解,电热水器有其工作环境的特殊性,即电流大、环境潮湿,普通的漏电保护器长时间通电容易产生温升而发烫,使其失灵或误操作。康泉电热水器独有的漏电保护装置采用插头分体式结构,距离插座250～300mm,避免了由于距离插头近而容易失灵或误动作的现象。它的外部还特制防护罩可起到防火、防潮、防溅的作用。目前该装置已通过两项国家专利,并通过国家CCEE安全认证。     

硬同轴线接插头工艺优化研究

介绍了硬同轴线连接头的结构工艺特点,在大功率传输条件下,分析了硬同轴线接插头的各种常见失效模式和失效机理,结合生产实际情况,增加了分离力和多余物等检验项目,加强工艺过程控制,并提出了提高接插头可靠性的若干建议.     

有线电视故障的自行检测

在收看电视节目中,由于信号线路传输、线间信号放大器、线路信号与馈线连接等原因,图像会产生各种故障现象而影响收看,如图像色彩时有时无、图像清晰度差、画面出现干扰波形、屏幕产生雪花点等问题,究其原因,除室外信号传输线路及线间放大器故障外,一般常见问题均出在室内电视机与外线连接处、电视机插座、电视馈线插头、终端接线盒等部位,在业余条件下只要对每一处认真排查,故障点就比较容易找到。(1)电视馈线插头:电视机上使用的专用 75Ω馈线信号插头最易产生故障,其主要故障是馈线与插头接触不良、馈线芯线断线、馈线屏蔽层脱离,有…     

3例故障检修

（1）某小区有几幢楼收不到有线电视信号。这几幢楼的“楼放”为60V供电，印V供电器的电源指示灯不亮。供电器和该幢楼的220V放大器共用一个电源插座，拔下这两个插头，发现供电器电源插头的金属片被烧了一个缺口，且与该插头连接的插孔处被烧焦而变形，但接220V放大器的插头和插座均完好无损。用万用表测有223V电压，此时再将供电器的插头插入，223V电压不见了，原来这223V电压是虚电，只要一加上负载，电压即为O。检查供电器电源线与电力三相四线接头处，剥开绝缘胶布发现电源线的铝芯被氧化成粉末状，一碰便脱落下来。原来小灵通基站的电源也取自该处，而他们的电源线是铜丝的，和我们的铝芯线缠绕在一起接在电力铝芯线上，并用绝缘胶布包起来。在潮湿、高温的环境下，铝和铜发生化学反应，致铝芯被氧化成粉末状，而印V供电器比220V放大器产生的电流大，在接头处打火产生的热量高，导致该插头和插座均被烧坏。在电力线上重新开口接好电源线，并用胶布包好，再抉掉插座，故障排除。     

带有同轴插头的高温微型绝缘套

法国RadiallSA公司现已选定Victrex的PEEKTM树脂 ,用于制造新型IMP系列超微型同轴插头。这些插头是专为表面安装技术(SMT)而设计的 ,安装在两层印刷电路板之间。此类小插头的高度仅有3mm ,因而能够充分利用空间。由于其有效频带高达6GHz,因而具有广泛的用途 ,包括手机和便携式电脑。插头内的小绝缘套采用30 %玻璃纤维增强型PEEKTM树脂制成 ,可短时耐受高达260℃的焊接温度而保持尺寸不变 ,这对于插头的使用功能是非常重要的。玻璃纤维增强型PEEKTM树脂的热变形温度为315℃。由于绝缘套的尺寸极小 ,Radiall公司选择高流动性Vic …     

细致魅力拜亚DTX100入耳式耳塞

拜亚（beyerdynamic）又回来了。这个曾经根负盛名却又因其产品更新过慢而被渐渐淡忘的德国耳机品牌再次推出了一系列新产品而DTX100就是其中的代表。DTX100做工精致它针对用户的使用习惯在细节上下足了功夫.首先，它的耳塞插头全部采用拜亚独有的灵活L型插头设计，更适合iPhone手机的耳机插孔；其次，它在线材上选用柔软的高强度弹性体电缆，不会因长时间的缠绕而断裂；     

新式微型连接器的应用及接线装配技术研究

新式J30J微型连接器是一种超小型矩型插头座且为压接形式.其插头座的接线装配困难、复杂,导致了接线装配工艺复杂,生产周期长,操作困难等.通过分析该连接器的特点,不断的摸索和试验,制定出新式微型连接器的接线装配工艺规范和路线.很好地解决了复杂电缆中微型连接器的生产瓶颈,为各类产品应用J30J微型连接器提供有益的帮助.     

黄油妙用一法

通常,各种家用电器是依赖插头、插座来取得市电电能的;而电器在使用中出现的一些故障往往与插头、插座连接不可靠有关。所谓"连接不可靠"是指:插拔件因松动、受潮、氧化、腐蚀或带电操作时产生的电弧烧蚀而导致接触不良。为杜绝这类故障,笔者在处理插拔件稳固的同时,还在插头金属片(条)上涂     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.