Proteus图表仿真在单片机控制ADC0831芯片时序中的应用

仿真在电子设计过程中起着非常重要的作用。而单片机控制芯片的时序是否正确直接影响系统能否正常工作,因此研究单片机控制芯片读写时序具有很重要的意义。以简易数字电压表系统中的单片机控制A/D转换器ADC0831芯片为例,阐述用Proteus的图表波形进行单片机控制芯片读写时序仿真的方法。通过硬件和软件设计仿真对单片机控制ADC0831芯片的读写时序进行详细分析,探索使用Proteus对单片机控制芯片读写时序仿真的方法。     

DS18B20工作原理及基于C语言的接口设计

主要介绍了DS18B20的内部结构和单总线接口（1-wire bus interface）的特点,然后介绍了DS18B20的读写时序和操作流程,C语言实现精确时序控制的方法.最后给出了C代码和硬件设计的要点.     

基于FPGA和SC16C2552实现微处理器的串口扩展

介绍了FPGA和SC16C2552扩展微处理器串口的硬件设计,给出了SC16C2552的通用读写时序模块的Verilog HDL代码和数据读写模块VerilogHDL代码,给出了仿真波形,最后讨论了微处理器的读写实现。     

DS18B20在高精度内燃机车油耗仪中的应用

介绍了单总线数字式温度传感器DS18820的工作原理及在内燃机车燃油消耗测量系统中的应用，该系统实现了对内燃机车燃油消耗的精确计量。简要的阐述了对内燃机车燃油进行精确计量的重要性以及计量方法和系统的硬件结构。重点讲述了选用DS18820的原因及其性能特点、工作流程、接口电路以及在使用中遇到的问题，并且对DS18820的精度进行了测试。详细介绍了用C语言实现DS18820读写时序的方法。     

基于EPP模式的AD7008接口电路设计

介绍了并行端口的3种接口模式，论述了EPP接口的特点、端口信号定义、寄存器及读写时序，给出了AD7008的EPP接口电路。     

基于PCI9052的CNC齿轮测量中心CAMAC机箱控制器的研制

给出了基于PCI9052的CNC齿轮测量中心CAMAC机箱控制器的软、硬件开发过程和读写时序控制方法。设计中采用了可编程逻辑器件EPM7128来实现总线信息的接收和译码,从而生成CAMAC命令,控制测量机多轴联动和数据的采集。介绍了采用DDK开发该卡的WDM驱动程序的方法。     

ONE WIRE器件接口IP核的CPLD设计

根据单片机一线制扩展的特点．在EDA软件ISE的环境下．利用VHDL语言建立一线制IP核。此设计利用状态机实现，并下载到芯片通过硬件试验验证．可以解决ONE WIRE器件和单片机接口读写时序严格的问题，从而解决了一线制通信器件应用问题．满足不同场合的需求。     

基于运动控制卡的数控系统在连续加工中辅助功能的实现

开发运动控制卡＋PC的数控系统,实现了在连续加工中实现M代码的功能。国内的一些运动控制卡的运动控制缓冲区只能加载有限的运动指令以支持连续运动。在连续运动的同时,端口读写指令无法加载进入运动缓冲区,因而无法配合端口读写,即执行M代码。从而无法满足一个完备的自动加工程序的需要。在此解决了G代码和M代码的时序配合问题,以满足实际加工的需要。     

基于S3C4510B嵌入式系统CF卡高速存储技术

首先简要介绍了ARM7TDMI系列的嵌入式微处理器芯片S3C4510B,并介绍了CF卡的基本结构和原理,接着研究了S3C4510B与CF卡硬件接口电路的设计以及对CF卡的读写.在CF卡标准读写时序的基础上,研究了在嵌入式系统中怎样提高CF卡读写的速度,最终给出了基于DMA方式的高速读写方式.     

基于TMS320C6201的高速数据采集模块设计

介绍了基于TMS320C6201 DSP的高速数据采集模块的构成,阐述了利用FIFO实现的DSP与ADC间数据传输的电路结构,分析了ADC采集数据的读写时序以及DSP EMIF的具体设置和数据传输方式,根据硬件结构特点提出了设计中需要注意的问题,提高了DSP硬件利用率.     

Estimation of the optimal regularization parameter of an iterative wavelet algorithm for signal recovery

Two methods of statistical estimation of the optimal regularization parameter of a nonlinear algorithm for signal recovery are proposed, one of which is based on the optimality criterion and the other one on the residual principle. These methods have simple algorithmic implementation and do not need a priori information about the quantitative characteristics of the sought solution. The results of numerical experiments show the effectiveness of the method based on the optimality criterion.     

光栅莫尔条纹细分技术的研究

光栅是一种精密测量装置 ,测量原理是以光栅移动形成的莫尔条纹为基础。介绍输出正弦信号和方波信号的光栅在位移测量中脉冲细分的常用方法 ,分析其中两种方法的电路与波形并对其进行实验 ,验证细分原理的正确性     

基于实例推理的绿色产品配置方法研究

设计经验表明,绿色设计方法只有与现有成熟的设计方法有效融合,才能发挥应有的作用.基于实例推理的产品配置是产品配置常用方法之一,将绿色设计思想融入基于实例推理的产品配置中,分析研究了组件组成产品的绿色性能转换规则以及寻找最相似产品的方法,提出了基于实例推理的绿色产品配置方法.最后以豆浆机产品为例,对该方法进行验证.     

录返旋压机芯模数据的采集方法

能够实时地采集芯模数据是录返旋压机具有的重要特性.针对录返旋压机芯模数据的采集问题,提出基于电信号以及液压控制两种不同的方法,并进行试验研究,得到了采用液压控制的方法更加可靠、精确的结论,并将此法应用于批量生产试件,取得了实际有效的成果.     

基于PC机的方波信号周期测试方法研究与应用

给出了用 PC机测量方波信号周期的两种测试方法 :一种是将方波信号作为模拟信号送入计算机 ,通过 A/D转换为数字信号后再经过相应计算得出方波信号的周期 ;另一种是将方波信号作为开关量送入计算机 ,通过软件计数的方法直接得出方波信号的周期。同时 ,对这两种方法进行了较为详细的比较研究 ,指出了这两种方法各自的优缺点 ,并给出了一些应用实例     

A method for detection and diagnosis on batch fermentations

In this work we present some basic ideas about detection and diagnosis of faults and abrupt dynamic changes in batch fermentations. Our work focuses on the simultaneous use of two detection methods (residual based and balances based) within the estimation procedure. The idea behind the use of both methods is that the weakness of one of them can be compensated by the use of the other one. Thus the simultaneous use of both methods allows detecting and possibly isolating a wide range of faults. Observations such as the effect of nonlinearities on the detection tests and robustness to model uncertainty are discussed. Numerical results on a particular case, the xanthan gum batch fermentation, are presented. Simulated faults and abnormal behaviors were promptly detected but diagnostics showed mixed results.     

一种基于粗糙集理论的最优故障诊断规则获取方法

为了获取最优故障诊断规则,给出一种基于信息标记的改进属性值约简算法,以及针对规则的冗余、矛盾、从属等方面的规则检测方法,并应用于某型航空电子设备故障诊断中进行最优诊断规则获取,结果表明诊断有效。     

Selection of dispatching rules in FMS: ANP model based on BOCR with choquet integral

Scheduling policy which depends on selection of dispatching rules is one of the reasons which affect FMS’ productivity. Selection of a dispatching rule can only be based on one or two criteria such as processing time, due date, or system components at traditional methods such as mathematical programming, simulation, and heuristic algorithms. However, traditional methods have some weakness; the first one is about selection criteria based on only one dispatching rule or a few combination of the rules, the second one is related with not considering most of the manufacturing system information, and the last one is to deal with selection decision is not a dynamic structure. In this study, an analytical network process (ANP) model has been developed in order to eradicate these weaknesses. The model based on multiple criteria decision-making process. In addition, most of manufacturing system information have been employed, and it consists of a dynamic decision-making process. The proposed model has a comprehensive structure which consists of a company’s manufacturing criteria and macro-strategies. Although interdependence is accepted among criteria in ANP, non-interaction is assumed among them (i.e., additive measure). Because of existence of interactivities among criteria, a choquet integral has been adapted in an ANP model.     

装备维修作业可视性验证方法研究

论文根据装备维修性设计,分析了维修作业对人体视觉的要求,提出了两种维修可视性验证方法:一是基于可视锥的维修可视性验证方法;二是维修部位可视域与可视锥相结合的可视性验证方法,构建了维修部件的可视域,对装备维修可视性验证提供了重要参考价值。     

A new identification method of viscoelastic behavior: Application to the generalized Maxwell model

This paper focuses on the generalized Maxwell model (GMM) identification. The formulation of the transfer function of the GMM is defined, as well as its asymptotes. To compare identification methods of the parameters of the GMM, a test transfer function and two quality indicators are defined. Then, three graphical methods are described, the enclosing curve method, the CRONE method and an original one. But the results of graphical methods are not good enough. Thus, two optimization recursive processes are described to improve the results of graphical methods. The first one is based on an unconstrained non-linear optimization algorithm and the second one is original and allows constraining identified parameters. This new process uses the asymptotes of the modulus and the phase of the transfer function of the GMM. The result of the graphical method optimized with the new process is very accurate and fast.