Design of Pipelined ADC Using Op Amp Sharing Technique

This paper presents a 10-bit 20 MS/s pipelined Analog-to-Digital Converter(ADC)using op amp sharing approach and removing Sample and Hold Amplifier(SHA)or SHA-less technique to reach the goal of low-power consumption.This design was fabricated in TSMC 0.18 μm 1P6M CMOS technology.Measurement results show at supply voltage of 1.8 V,a SFDR of 42.46 dB,a SNDR of 39.45 dB,an ENOB of 6.26,and a THD of 41.82 dB are at 1 MHz sinusoidal signal input.In addition,the DNL and INL are 1.4 LSB and 3.23 LSB respectively.The power consumption is 28.8 mW.The core area is 0.595 mm2 and the chip area including pads is 1.468 mm2.     

Time tick based method for measuring static errors of ADC

This paper presents a novel Time Tick based Built In Self Test (TT BIST) for measuring the static errors of an Analog to Digital Converter (ADC). The proposed method determines the period elapsed during transition between two consecutive digital levels and compares it with the ideal period of transition. A counter that works, at higher speed relative to the sampling rate of the ADC under test, is used. It counts the number of time ticks occurred during every transition. The required ramp signal is generated dynamically, using current source with digital switch for selecting the equivalent test signal. Further to support testing of errors in ratiometric ADC, a slope conditioning module is also implemented. The entire computation cycle is done in a single ramp cycle whereas in conventional histogram method multiple waveforms are required. Thus, the proposed TT method requires less time to achieve desired accuracy levels by choosing the appropriate slope of the ramp signal.     

Development of a Probe System for Measuring the Plasma Parameters and the High-Energy Part of the Electron-Energy Distribution Function

Instruments and Experimental Techniques - A probe system has been developed on the basis of an external ADC/DAC module (ADC is the analog-to-digital converter and DAC is the digital-to-analog...     

基于自动测试系统的ADC测试开发

A／D转换器（ADc）是混合信号系统中的重要模块，是电子器件中的关键器件。随着器件时钟频率的不断提高，如何高效、准确地测试ADc的动态参数和静态参数是当今ADc测试研究的重点。本文阐述了ADC的静态和动态参数测试，并在自动测试系统的ADC测试过程中，深入分析了ADC测试环境的配置，从而实现了一种低成本、高可靠性的ADC计算机辅助测试方法，并在BC3192VS0测试系统上得到了验证。     

微机继电保护装置的一种新设计方法

本文提出一种用于微机继电保护ＣＰＵ主板的新设计方法,用一片８０Ｃ１９６ＫＢ（ＣＰＵ）和两片ＡＤ７７９ＫＮ（ＡＤＣ）实现了８路电力参数信号的近似同相位的数据采集,系统分辨率为１４位。     

基于GSM水位远程检测系统设计

本文介绍了一种利用单片机（AT89C2051）及GSM无线收发模块（G100A）构成的远程水位显示及远程检测系统。在系统中,设计了一种简单易于实现的水位检测方法以测得现场水位的状况,通过单片机显示系统在水位现场以LED的方式显示出来,并通过与之相连的GSM模块将水位信息以一种无线短信的方式发送给远程终端（用户手机）,起到实时检测与实时报警的作用。另外,远程终端可以通过短信实时的查询水位信息。     

基于模块化控制的配电终端智能调试机器人控制系统

提出了基于模块化控制设计一种配电终端智能调试机器人控制系统。首先,采用通信模块与数据采集模块获得智能调试机器人的数据信息,通过传感器等设备将数据传输给主控制模块;然后,汇总相关数据信息,并在主控模块下达指令对配电终端智能调试机器人进行控制;最后,通过模块化使机器人控制系统实现动态避障与最短路径规划。实验结果表明,该系统实际调试配电终端时能够平滑稳定的控制机械手完成调试工作,同时具有良好的避障效果,配电终端调试效率高。     

A study on fault diagnosis and maintenance of CNC-WEDM based on binary relational analysis and expert system

The paper presents a binary relational analysis and expert system base module for maintenance and fault diagnosis of CNC wire EDM. The module proposes a framework of integrated maintenance and fault diagnosis system. The study explores the binary coded matrix system, which plays an important role in prediction and diagnosis of wire electrical discharge machining (WEDM) faults on the spot by expert guidance. In this study, 15 inputs were considered to observe eight probable causes with the help of the forward and backward propagation algorithms. Inputs and output matrices were considered in the form of a square matrix. To explain the fault diagnosis and to realize the importance of maintenance through advice, the detection of faults is investigated through forward and back propagation of matrix transformation on the spot. It is an integrated backup that can be individually focused when input and output parameter do not match. It is a time saving, knowledge acquisition, easy to maintain, and capable of self-learning system. To verify the developed framework, 120 data sets were generated for proper analyzing of acquired output through graphical representation. The paper also presents some of the important features of maintenance schedule and probable causes of wire breakage with remedial actions in tabular form. The developed system can help the operators, trainees, and manufacturing engineers in achieving trouble free machining through quick detection of faults and proper maintenance of machines in actual practice.     

A study on fault diagnosis and maintenance of CNC-WEDM based on binary relational analysis and expert system

The paper presents a binary relational analysis and expert system base module for maintenance and fault diagnosis of CNC wire EDM. The module proposes a framework of integrated maintenance and fault diagnosis system. The study explores the binary coded matrix system, which plays an important role in prediction and diagnosis of wire electrical discharge machining (WEDM) faults on the spot by expert guidance. In this study, 15 inputs were considered to observe eight probable causes with the help of the forward and backward propagation algorithms. Inputs and output matrices were considered in the form of a square matrix. To explain the fault diagnosis and to realize the importance of maintenance through advice, the detection of faults is investigated through forward and back propagation of matrix transformation on the spot. It is an integrated backup that can be individually focused when input and output parameter do not match. It is a time saving, knowledge acquisition, easy to maintain, and capable of self-learning system. To verify the developed framework, 120 data sets were generated for proper analyzing of acquired output through graphical representation. The paper also presents some of the important features of maintenance schedule and probable causes of wire breakage with remedial actions in tabular form. The developed system can help the operators, trainees, and manufacturing engineers in achieving trouble free machining through quick detection of faults and proper maintenance of machines in actual practice.     

Image processed tracking system of multiple moving objects based on Kalman filter

This paper presents a development result for image processed tracking system of multiple moving objects based on Kalman filter and a simple window tracking method. The proposed algorithm of foreground detection and background adaptation (FDBA) is composed of three modules: a block checking module (BCM), an object movement prediction module (OMPM), and an adaptive background estimation module (ABEM). The BCM is processed for checking the existence of objects. To speed up the image processing time and to precisely track multiple objects under the object’s mergence, a concept of a simple window tracking method is adopted in the OMPM. The ABEM separates the foreground from the background in the reset simple tracking window in the OMPM. It is shown through experimental results that the proposed FDBA algorithm is robustly adaptable to the background variation in a short processing time. Furthermore, it is shown that the proposed method can solve the problems of mergence, cross and split that are brought up in the case of tracking multiple moving objects.     

离子迁移谱仪嵌入式系统的设计

介绍了离子迁移谱仪嵌入式系统工作原理及其核心部件嵌入式处理器和操作系统的选择,对系统的硬件结构和软件任务模块设计作了重点阐述,特别是对系统的核心CPU处理模块及关键技术作了详细介绍。     

A 128-Channel Simultaneously Sampling Data Acquisition System for the Diagnostic Complex of Experimental Plasma Facilities

The simultaneously sampling data acquisition system contains 16 eight-channel modules, which record the shapes of single pulse signals, and the controller module of the system bus of the Eurocrate, which interacts with the basic computer of the diagnostic complex via an Ethernet-FX communication line supported by TCP/IP protocols. The recording modules are based on 12-bit analog-to-digital converters (ADC). The ADC samples are fixed in buffer storage units with a capacity of up to 1 Mword/channel. The current amplitudes of the input signals are measured simultaneously in all recording channels with a time jitter of 3 ns. The maximum sampling frequency is below 4 MHz.     

一种新型红外气体分析装置的硬件设计

本文阐述了一种新型的红外气体分析装置的工作原理和电路设计。它包括光源、光电探测器、模数转换、DSP系统、液晶显示模块和串行通信接口等部分的设计。     

Direct power control of DFIG wind turbine systems based on an intelligent proportional-integral sliding mode control

This paper presents an intelligent proportional-integral sliding mode control (iPISMC) for direct power control of variable speed-constant frequency wind turbine system. This approach deals with optimal power production (in the maximum power point tracking sense) under several disturbance factors such as turbulent wind. This controller is made of two sub-components: (i) an intelligent proportional-integral module for online disturbance compensation and (ii) a sliding mode module for circumventing disturbance estimation errors. This iPISMC method has been tested on FAST/Simulink platform of a 5 MW wind turbine system. The obtained results demonstrate that the proposed iPISMC method outperforms the classical PI and intelligent proportional-integral control (iPI) in terms of both active power and response time.     

An Interactive Knowledge-Based CAD System For Mould Design in Injection Moulding Processes

This paper presents a practical prototype knowledge-based system, called IKMOULD, for mould design in the injection moulding process. It attempts to tackle the problem in a practical and integrative way, unlike the stand-alone and mathematical programs which have been developed in the past to solve only a part of the problem. A total quantitative and structured approach is not feasible in dealing with the complex and multirelated design problems generally involved in mould design. In this system, the computational module, the knowledge-based module and the graphic module for generating mould features are integrated within an interactive CAD-based framework. The knowledge base of the system can be accessed by mould designers through interactive programs so that their own intelligence and experience can also be incorporated with the total mould design. The approach adopted both speeds up the design process and facilitates design standardisation which in turn increases the speed of mould manufacture.     

Motor imaginary-based BCI for controlling a remote car

This paper presents the application of an effective electroencephalogram (EEG) based brain-computer interface (BCI) for controlling a remote car in a practical environment.The BCI uses the motor imagin...     

液晶显示智能仪表在注塑机中的应用

本文介绍了注塑机智能显示仪表的基本组成，该智能显示仪表系统的主要功能，系统监控模块，系统显示模块的结构以及具体的液晶显示技术和一些编程通用的思想。     

ADC0804在汽车轮胎自动充气系统压力测量中的应用

在汽车轮胎自动充气系统中．利用高精度压力传感器和模数转换模块ADC0804对压力进行实时动态测量与转换;采用8051系列单片机的中断技术和Keil C进行软件开发。     

可编程微波光纤延迟线时延特性分析与测量

本文采用激光器、光调制器、可编程光纤延时阵列及光探测器等构成了新型的微波光纤延迟线系统,对系统的发射、传输和接收三个组成模块进行了理论分析,建立了各模块及系统的数学模型,对系统的传输特性和时延特性进行了仿真.结果表明,此类微波光纤延迟线可视为线性系统.并采用矢量网络分析仪对系统进行了实测,幅频特性和相频特性在合理频带范围内均接近于理想情况,群时延测量结果与理论计算一致,延时精度达到10 ps以内.     

A smart memory type of data acquisition system for shaft misalignment maintenance

This paper presents the development results of a smart memory module for data acquisition system to examine the characteristics of shaft misalignment. The smart memory module is a standalone type with high capacity, and it can communicate with computer via RS-232 interface in off-line after data acquisition. In the process of shaft misalignment maintenance, the misalignment data achieved by strain gauges on the turbine rotor are synchronized with the angle data gathered by 4 angular sensors boarded on the smart memory system. The real time data are acquisitioned in the manner of self operation during testing; then the data saved in smart memory are translated into a computer for data processing and analysis via RS-232C. For the better precision, the system uses two types of filters: a low pass filter on interface circuit and a transfer average filter in software. Also, the effectiveness of data acquisition operation using the developed smart memory module is proved through the experimental results using mock-up system.