数字信号处理

Welding control system comprises hardware and software, using C language welding program, and it reduces difficulty of control system exploitation. Scheduling control, sampling disposal of feedback signals and digital PI modulation are achieved through program control, and this controls veraciously welding process.

焊接控制系统由硬件和软件两部分组成，焊接程序采用C语言编写，降低了控制系统软件开发的难度，通过程序控制实现时序控制、反馈信号的采样处理及数字PI调节，对焊接过程进行准确的控制。

Circuit system used varistor constitute the Wheatstone bridge to collect small changes in voltage, After amplification circuit amplified into A / D converter circuit, the input voltage digital signal after the conversion output AT89S52 conducted by the control and data processing and results in the LCD display.

系统电路采用压敏电阻构成惠斯登电桥来采集电压的微小变化，经过放大电路放大后送入A/D转换电路，对输入电压信号进行数字量的转换后输出，由AT89S52进行系统的控制和对数据的处理并将结果显示在液晶显示器上。

Because how to improve the measurement accuracy of CT parameters is the key of low voltage method, the paper in detail introduces the electronic parameters measurement circuit, furthermore,the needed digital sinal source ,CT ratio measurement circuit ,the way of digital sampling ang sinal processing are emphasized in the paper.

文中详细介绍了CT 内部参数的测量原理及实现方法。在其中着重讨论了校验仪中所需的高精度测试信号源及变比测量电路的原理和实现、数字采样技术及数据的分析处理方法。

The article through practice analysizes the local wireless broadcasting system, application of the elements and means of communication technology is being updated, A set of half-automatic broadcasting system controlled by hardware has been designed and assembled; A set of all-automatic broadcasting system controlled by computers has been designed and assembled; A set of emission equipment has been designed; Noise has been lowered in the transmission of audio-frequency so that the audio effect has been raised; new ways of audio-frequency transmission have been developed based on the technology of computer network.

本文通过对局域无线广播系统运行现状的分析和研究，运用电子信息技术的基本原理和方法，设计并自行装配了一套由硬件控制的半自动播出系统；研究开发了一套由计算机软件控制的全自动播出系统；设计了发射装置；通过对音频信号的传播环节进行降噪处理来提高收听品质；基于数字音频技术，开辟新的音频传播途径；并对系统功能的拓展进行探讨。

Furthermore, an integrative anti- interference solutions are provided, which are consisted of both hardware ones and software ones. Solutions in hardware include a multi-layer shielding structure and proper groundings of the whole system. Solutions in software include digital data pretreatment based on wavelet, FIR digital filter and algorithm of improved high order sine fit method. They do resolve the corresponding problems in on-site monitoring caused by strong electromagnetic field, noise in signals and harmonic and the fluctuation of power system frequency.

同时建立了以屏蔽结构和接地措施为主体的硬件抗干扰和以小波变换预处理、FIR数字滤波器、改进的tg δ高阶正弦拟合算法为主体的软件抗干扰相结合的综合抗干扰措施，有效解决了现场强电磁场干扰、信号中噪声干扰、谐波干扰以及系统频率波动等问题。

Furthermore, an integrative anti- interference solutions are provided, which are consisted of both hardware ones and software ones. Solutions in hardware include a multi-layer shielding structure and proper groundings o f the whole system. Solutions in software include digital data pretreatment based on wavelet, FIR digital filter and algorithm of improved high order sine fit method. They do resolve the corresponding problems in on-site monitoring caused by strong electromagnetic field, noise in signals and harmonic and the fluctuation of power system frequency.

同时建立了以屏蔽结构和接地措施为主体的硬件抗干扰和以小波变换预处理、FIR数字滤波器、改进的tg δ高阶正弦拟合算法为主体的软件抗干扰相结合的综合抗干扰措施，有效解决了现场强电磁场干扰、信号中噪声干扰、谐波干扰以及系统频率波动等问题。

Mainly on how to use new digital isolators ADuM1201 industrial analog signal to the scene of isolation and into the SCM corresponding data processing.

主要阐述了如何利用新型数字隔离器ADuM1201将工业现场的模拟信号进行隔离，并送入单片机进行相应的数据处理。

Wadia contends that using only a single analog gain stage and then handling all signals in the digital domain yields superior results by avoiding the noise and distortion elements present in even very high quality analog preamps.

瓦迪亚说，只用一个单一的模拟增益的阶段，然后处理所有信号数字域产量优异的业绩，避免噪声和失真分子甚至质量非常高的模拟功放。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。