Integrated wiring system for construction equipment

Advances in electronic technology have brought numerous changes in design of most types of construction equipment. Due to the electronic devices and electric loads, such as lamps and motors, a typical construction vehicle has many wires and connectors. The next phase of the changes is to focus on how to reduce these complex wires by using digital communications. This paper presents the development of an integrated wiring system for construction equipment. More specifically, an excavator that has more than 40 devices has been chosen in order to apply the concept of the integrated wiring system. After grouping electrical devices by their locations and functions, two communication controllers, i.e., an instrument controller and an engine-hydraulic controller, are defined. Two test controllers have been developed in order to prove the concept     

中职院校医学电子仪器设备共享技术管理

笔者结合自己多年的中等职业教学和管理经验,围绕医学电子仪器设备共享管理这一理念,介绍了中职院校医学电子仪器设备共享管理中心的具体做法,重点提出了电子仪器设备管理中的仪器设备授权、预约、计费等有关问题,并提出了相应的解决对策。     

Conducted IEMI threats for commercial buildings

While most of the emphasis has been focused on the radiated threat represented by intentional electromagnetic interference, it is clear that the threat from conducted disturbances should not be neglected. Conducted threats include those that are produced by the cable coupling of radiated fields and from the direct injection of conducted disturbances into the wiring of a building. It is well known that in the majority of cases, cables provide the most efficient means of transporting potentially damaging energy into equipment. The first part of this paper describes how electrical disturbances can impact electronic equipment inside a building through the power and earthing circuits. Measured data are summarized to illustrate how electrical signals propagate through the power and earthing circuits from the outside to the inside and what levels of signals create problems with electronic equipment. With this understanding of the impact of transient waveforms on electronic equipment and how these disturbances can propagate throughout a building, calculations are then used to evaluate different types of conducted threats to buildings.     

光电设备电子机柜布线工艺研究

作为信号和电能载体的导线，同时也是噪声的载体和外来噪声侵入设备的媒体。描述了噪声通过导线侵入设备内部的方式，通过降低噪声的途径确定了机柜布线的原则，介绍了布线的要求和方法，最后提出了用布线槽布线的建议。     

Compensation of errors in a voltage transformer by an electronic circuit

An automatic self-compensating technique for instrument (voltage) transformers has been presented. With the introduction of such an electronic compensator, even ordinary voltage transformers may behave with high accuracy and precision. Analytical and experimental results show that the compensator brings down the ratio and phase angle errors significantly. The arrangement presented is simple, but constitutes a definite modification of existing methods used for error compensation.     

On-Board Optical Data Communications Network for Train Control

Recently, electronic control equipment has begun to be installed in trains. This equipment is being used to communicate control and status information to allow trains to be operated more efficiently and reliably. However, the use of such equipment causes an increase in the amount of control and monitor information generated on a train, which in turn causes an increase in the amount of wiring required to carry the information. Until now, monitor equipment data have been multiplexed, and metal wire cables have been used, to reduce the amount and weight of wiring used [1].     

电子整机三维自动布线技术研究

电子整机的快速布线是影响整机快速制造的瓶颈之一。本文采用三维加权网格,对电子整机三维模型进行网格划分,描述了布线空间。运用基于网格的迷宫算法和最小斯坦纳树生成法,进行线缆敷设的线路搜索,并加入Rubin优化算法改善搜索速度。结合实际工程经验和规则,以自行开发的电子整机三维布线系统(3DRS)验证了该算法的可行性。     

电力电子装置的EMC设计

为了保证电力电子装置具有良好的电磁兼容性,在产品的设计初期就应当进行EMC设计,这时所花费的代价最低.本文分析了电力电子装置产生电磁干扰的三个要素,提出了针对性的EMC抑制措施,从系统接地、隔离、合理的结构布局和布线、屏蔽、滤波方面进行了EMC设计的分析,对电子设备的电磁兼容性设计提供了一定的参考方法.     

发射机的电磁兼容性设计

EMI（电磁干扰）问题的深入研究对提高所设计产品的可靠性有着较大的现实意义。文中阐述了EMC（电磁兼容性）在电路设计中的重要性和电子设备的EMC问题。就雷达发射机的EMC设计问题,根据发射机干扰信号的传播途径和耦合方式,针对经常出现的各种EMI问题,提出了接地、屏蔽、滤波、瞬态抑制等4种抑制EMI的方法。介绍了其他一些常用的提高设备EMC的方法,分别从PCB（印制电路板）设计、设备内的布线、软件抗干扰设计等方面进行了探讨。     

一起电压互感器二次回路接地事故的分析及启示

某变电站发生一起110kV副母C相电压互感器二次线圈接地的事故,该事故最终引起110kV副母压变空开、正母压变空开相继跳闸,110kV副母压变隔离开关的误分闸。本文详细分析了此次事故的原因及发展的过程,并提出了对电压回路N600接线的改进方法,以求降低类似事件的影响范围。     

电子设备多场耦合求解方法研究

由于组成复杂,现代电子设备正面临着日益严重的多场耦合问题。文中首先以电子设备中常见的电源模块为对象,分析了影响较大的几种典型耦合关系;其次为满足工程计算的需要,根据分析结果对耦合问题进行了必要的简化,设定电子设备中的耦合关系以两两耦合和线性弱耦合为主;同时还建立了电子设备多场耦合简化模型,并给出了采用序贯求解法的耦合求解算法;最后基于以上研究成果,建立了电源模块多场耦合问题的解耦仿真流程。     

The Electronic Circuit Composition and Structure of Thread for a Novel Braid Electronics-Systems by Kumihimo Structure

The new integrated circuit concept that forms electronic equipment by the textile structure using the flexible fiber has been proposed. In this report, we propose another integrated system-concept of flexible electronics based on "braid structure." The braid integrated system forms electronic equipment constructed by the filamentous body. Electronic integrated circuits are constructed with kumihimo-structure by weaving more than eight threads on which field effect transistors, photoelectric transducers, contact electrode pad and wiring pattern are mounted periodically. The circuit composition and a concrete structure of threads for kumihimo are discussed.     

Some electromagnetic aspects of coreless PCB transformers

In this paper, some EMI aspects of using coreless PCB transformers are addressed. Based on the antennas theory, the radiated power of a coreless PCB transformer is estimated and found to be negligible. The electromagnetic field plot of a power electronic circuit using a gate drive circuit isolated by a coreless PCB transformer has been recorded. The major radiated EMI source in the frequency range of 30 MHz to 300 MHz is found to be the copper tracks of the power circuit, where switching transients occur, rather than the coreless PCB transformer. Coreless PCB transformers essentially operate at relatively low frequency (8 MHz in this case) by near-field magnetic coupling. Experimental results have confirmed that the application of coreless PCB transformer in gate drive circuit will not impose any serious EMI problem on the power electronic circuit     

分布式光纤传感器开关柜温度监测探讨

阐述了分布式光纤温度传感器的工作原理,根据电力设备温度监测的特点,探讨了用于高压开关柜温度在线监测的传感系统方案。设计了基于全分布式和准分布式光纤传感技术的高压开关柜温度监测系统,比较了不同监测系统的特点,指出了适用于电力系统高压开关柜温度测量的方法。     

刚-挠结合PCB设计技术

刚-挠结合PCB具有可挠曲性,能够实现三维布线,在电子设备中的应用越来越广泛。文中详细介绍了刚-挠结合PCB设计的基本原则。     

电子控制设备的抗干扰设计

电子控制设备经常受到外界的电磁干扰,影响其正常工作,甚至会无法工作或发生事故。基于以上情况,必须加强对电磁干扰的研究。介绍了干扰的定义,干扰的传播途径,并针对各种类型的干扰,提出了相应的解决方法。并对采用抑制干扰电路或器件、滤波、接地、屏蔽、合理布线作了详细的说明。通过在工程实践中对电磁干扰的实际应用,具体说明了电子设备的抗干扰设计方法。虽然电子设备的工作环境千差万别,但只要掌握了抗干扰设计的基本方法,通过反复实践,就能找到一种行之有效的方法,电子设备可以在各种复杂的电磁环境下正常工作。     

A transformer with high coupling coefficient and small area based on TSV

Transformer is an important passive device, which is widely used in radio frequency (RF) Integrated circuit (IC). In this paper, three-dimensional transformers with turn ratios of 1:1, 1:2, and 1:3 and with primary and secondary windings nested by TSV technology is proposed. To evaluate the characteristics, the proposed transformers are simulated by HFSS software. The simulation results show that their coupling coefficients are 0.966, 0.966, 0.967, and their area are 3.6 × 10⁻³, 6.0 × 10⁻³, 9.6 × 10⁻³mm². Compared with the other literature, the proposed transformers have good coupling and small area.     

数字电子设备故障的检修

数字电子设备通常因其结构和连线较复杂，在使用过程中经常会出现故障，对数字系统故障的产生原因进行分析．并提出了故障检查和排除的方法。     

防雷设计中的接地问题

针对防雷设计中电子设备的防雷接地,从外部防雷装置中接地体的选用、有效降低接地电阻的大小来符合国家标准要求以及选择合适的联合接地方式等3个方面阐述了合理接地的问题。通过对布线、屏蔽和接地方式,空间电磁场对通信线路的电磁感应影响情况和降阻剂对接地电阻的影响试验,总结出了能够保护电子设备的安全布线和接地方式。     

浅析数字信号处理对电子测量与仪器的影响

数字信号处理是当前使用电子仪器进行测量工作的重要组成组成部分。可以说,测量是人类社会发展过程中必不可少的一项工作,而电子仪器则是测量工作发展至今最为先进的设备。如何才能够通过数字信号处理加强电子测量仪器的使用效果成为了当前亟待解决的问题。本文便将对数字信号处理技术对电子测量与仪器的影响进行分析,并提出一些意见与建议。