求一篇单片机的英文文章？

基于虚拟仪器labwindows/cvi的电能质量分析仪
【英文篇名】
power
quality
analyzer
based
on
lab
windows/cvi
【中文关键词】
虚拟仪器;
电能质量;
labwindows/cvi;
快速傅立叶;
【英文关键词】
virtual
instruments;
power
quality;
labwindows/cvi;
fourier
transform;
【摘要】
针对传统电能质量分析系统存在的存储容量小,显示功能单调,非正弦电参量测量误差大,数据分析处理能力欠缺等问题,提出了基于labwindows/cvi虚拟技术平台的电能质量分析仪的设计方案,其中包括利用过零检测方法进行频率检测和测量;利用快速傅立叶变换求出基波和谐波幅值、相位;利用相关方法求信号的相位差等.经反复测量及试验,效果良好.
【英文摘要】
traditional
power
quality
analyzer
has
the
problems
that
storage
capacity
is
small,the
display
function
is
monotonous,the
measurement
error
of
non-sinusoidal
parameter
is
big
and
the
data
analyzing
and
processing
is
imperfect.this
paper
proposed
the
design
scheme
of
power
quality
analyzer
based
on
labwindows/cvi.it
includes
measure
the
frequency
by
zero
cross
detection.to
measure
the
amplitude
and
phase
of
fundamental
and
harmonious
by
fast
fourier
transform
and
to
get
the
phase
deflection
by
correlation.

This system design take at89S51 chip as core controlling element, auxiliary by necessity peripheral circuit, designed one to have retakes courses with replays the function to retake courses machine, it by 5V direct-current power supply power supply. This system adds on one in the ordinary playback's foundation to retake courses the key to carry on the control. The control function including presses down retakes courses the key control circuit to store in the monolithic integrated circuit through a/D transformation chip gathering voice signal, presses retakes courses the key to carry on retakes courses the playback, presses again puts the key to start the normal playback. A \ the D sampling circuit uses ADC0809 to realize, D \ a switching circuit uses DAC0832 to realize, and the postpositioned power amplifier actuates the speaker work. The present paper mainly introduced retakes courses machine the software and hardware part's design, as well as the question which and the solution in the design, the debugging process meets.

本系统设计以AT89S51芯片为核心控制元件，辅以必要的外围电路，设计了一个具备复读与重放功能的复读机，它由5V直流电源供电。本系统在普通放音器的基础上加上一个复读键来进行控制。控制功能包括按下复读键控制电路通过A/D转换芯片采集语音信号存入单片机中，按复读键进行复读放音，再按放音键开始正常放音。A\D采样电路采用ADC0809来实现，D\A转换电路采用DAC0832来实现，并后置功率放大器来驱动扬声器工作。本论文主要介绍了复读机的软、硬件部分的设计，以及在设计、调试过程中遇到的问题及解决方案

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