检索结果-南通市图书馆

Effects of Electric contact failure on Signal Transmission in the Lossy Circuits

The Journal of China Universities of Posts and Telecommunications 2004年第2期11卷 50-54页

作者： CHENYa SUNBai-sheng Lab of Testing TechnologyandAutomationApparatus Beijing University of Posts and TelecommunicationsBeijing100876P.R.China Lab of Testing Technology and Automation Apparatus Beijing University of Posts and TelecommunicationsBeijing100876P.R.China

Based on the former research results of the influence of contact failure in ideal and unmatched circuits, this paper further studies theoretically the effects of contact failure on the digital signal transmission in the lossy circuits, which may happen widely in practical applications. Experiences show that even in high-quality lines, losses deform the voltage and current wave shapes owing to their effects on the amplitude of the various waves making up the over-all line voltage and current. Although the derivations show that the effects of contact failure in the lossy circuits on the signal transmission are quite complicated. The probability of occurrence of error codes can be increased significantly.

关键词： contact failure lossy circuits signal transmission

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE PHYSICAL MODEL AND MATH MODEL OF contact failure ON SMALL CURRENT contactS UNDER MECHANICAL ACTIONS

引用

Journal of Coal Science & Engineering(China) 1998年第2期4卷 73-77页

作者：郭凤仪刘玉珍赵然王其平

Based on the experimental results of the references [1] and [2], i. e., the contact resistance increases due to the contaminants formed on contact surface with the operating cycles,the physical model and math model of contact failure on small current contacts under mechanical actions are proposed through deep theoretical analysis in this paper.

关键词： contact resistance contact failure contaminants physical model and math model fretting corrosion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Manifold Decomposition Processes of Silicone Vapor and Electrical contact failure

Manifold Decomposition Processes of Silicone Vapor and Elect...

引用

The 26th International Conference on Electrical contacts and the 4th International Conference on Reliability of Electrical Products & Electrical contacts

作者： Terutaka Tamai Shigeru Sawada yasuhiro Hattori (ElConTech Consulting Ltd.) Shiroi city ChibaJapan (Mie University) Tsu city MieJapan (AutoNetworls Technilogy Ltd.) YokkaichiMieJapan

ISBN: (纸本)9781622763136

Adsorbed silicone vapor on contact surfaces decomposes typically to SiO by elevated temperature due to discharge or Joule ***,even if temperature is lower than decomposition temperature,weak decomposition is induced in very complex ***,silicone molecule has an equilibrium reaction from linear molecular structure to ring structure,or its reverse reaction in the room temperature. Furthermore,in the oxidation process,as the molecular changes various structures and causes imperfect decomposition,and various types of compounds *** the present paper, electrical condition of load and occurrence of the failure due to silicone vapor contamination were discussed with practical *** it was clarified that various high polymer silicone compounds including liquid are formed by their polymerization in the decomposing ***,a mechanism of formation of carbon from the silicon vapor under this process is also discussed.

关键词： silicone vapor silicone contamination silicone compound contact failure decomposition relay

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Combined effects of fretting and pollutant particles on the contact resistance of the electrical connectors

引用

Progress in Natural Science:Materials International 2017年第3期27卷 385-390页

作者： Zhigang Kong Jonathan Swingler Research Laboratory of Electrical contacts Beijing University of Post and Telecommunications School of Engineering & Physical Sciences Heriot-Watt University

Usually,when electrical connectors operate in vibration environments,fretting will be produced at the contact *** addition,serious environmental pollution particles will affect contact resistance of the *** fretting will worsen the reliability of connectors with the pollutant *** combined effects of fretting and quartz particles on the contact resistance of the gold plating connectors are studied with a fretting test *** results show that the frequencies have obvious effect on the contact *** higher the frequency,the higher the contact resistance *** quartz particles cause serious wear of gold plating,which make the nickel and copper layer exposed quickly to increase the contact *** in high humidity environments,water supply certain adhesion function and make quartz particles easy to insert or cover the contact surfaces,and even cause opening resistance.

关键词： Gold plating Fretting contact failure Electrical contact

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

contact Resistance Characteristics of Relays Operated in Vapors Evaporated from Non-Silicone-Type Acryl-Based Polymeric Products Cured in Various Manners

Contact Resistance Characteristics of Relays Operated in Vap...

引用

The 26th International Conference on Electrical contacts and the 4th International Conference on Reliability of Electrical Products & Electrical contacts

作者： Makoto Hasegawa Nanae Kobayashi Yoshiyuki Kohno Hiroshi Ando Chitose Institute of Science and Technology Kaneka Corporation OsakaJapan

ISBN: (纸本)9781622763136

The authors have already reported that when relays were operated to break load currents in vapors evaporated from an acryl-based non-silicone-type polymeric cured product that can be used as replacement of conventional silicone-type products, the resultant contact resistance characteristics show no *** this paper,the acryl-based non-silicone-type product of UV-radiation-cured type was used,and influences of its vapors on contact resistance characteristics of relays at an ambient temperature of 120℃were ***,a commercially-available mechanical relay(AgSnIn contacts) was sealed into a metal can with the product,and placed in a heating chamber to operate,at an operating frequency of 1 Hz or 0.5 Hz, 40 000 break operations of an inductive DC 14V-1A or 14V-0.4A load *** resistance values were measured at every 50 *** a result,the relays showed no deterioration in contact resistances.

关键词： polyacrylate silicone siloxane contact resistance contact failure arc discharges

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：