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test
- 一. 实验目的: 1.了解光电开关的使用方法 2.了解利用光电传感器测量电机转速的方法 二.光电测速基本原理 光电测速的基本电路由光电传感器、计数器和定时器组成。测量时在被测电机主轴上固定一个圆盘,圆盘的边缘上打上小孔。传感器的红外发射端和接收端装在圆盘的两测,电机带动圆盘转到有孔的位置时,红外光通过,红外接收管导通,输出低电平。红外光被挡住时接收管截止,输出高电平。用计数器记录在一定时间内传感器发出的脉冲个数就可以计算出电机转速。 三.实验内容 1.接线方法
design-a-decade-counter
- 设计一个四位二进制计数器,将计数结果由数码管显示,显示结果为十进制数。数码管选通为低电平有效,段码为高电平有效。-The design of a four-bit binary counter will count digital display, and displays the results as a decimal number. Digital tube strobe active-low segment code for active high.
123
- BP滤波VB源程序代码,可以对数据进行高通和低滤波-BP filter VB source code
IIRfiler
- 对于采集的加噪声的语音信号进行IIR数字滤波,包括低通,带通,高通-For the acquisition of noisy speech signal IIR digital filtering, including low-pass, band-pass, high pass
Low-pass-filter-design
- 虚拟低通滤波器设计:可以产生正弦信号和白噪声时域信号波形,以及混杂噪声的正弦波波形,信噪比可调。-Virtual low-pass filter design: sinusoidal signal can be generated and the time-domain white noise signal waveform, and hybrid noise sine wave signal to noise ratio is adjustable.
5
- 设计一个一维滤波处理程序(1.分别做低通、高通、带通、带阻等理想滤波器进行处理;2.窗函数)-Design a one-dimensional filter processing program (1 respectively do low pass, high pass, band pass, band stop filter such as the ideal treatment 2 window function)
6
- 用MATLAB进行低通高通滤波,比较实用的几个程序-Using MATLAB low-pass high-pass filter, a few more practical program
LP1O
- 通过理论公式推导得到的简易单通道一阶低通滤波器,相比于labview自带滤波器而言,实时性更强。-Simple low-pass filter derived first order transfer function. It runs faster than official filter vi files.
tydt
- 用椭圆低通滤波器对语音信号进行滤波处理,实现降噪处理-The elliptic low pass filter is used to filter the speech signal, and the noise reduction processing is realized.
IIRDF
- 低通滤波器的设计,可以实现滤波前后的频率普和幅度谱的对比-Low-pass filter design, you can achieve before and after the filter frequency and amplitude of the spectrum comparison
FIR-filter
- 实现用FIR低通滤线性相位滤波器滤除声音中的噪声-The FIR low-pass filtered linear phase filter is used to filter the noise in the sound
chenxu
- (1)录制一段语音信号,完成对信号的采样,画出信号的时域波形和频谱图,确定信号的频谱范围; (2)给信号叠加噪声(噪声类型分为如下几种:a白噪声;b单频噪色(正弦干扰);c多频噪声(多正弦干扰);d其它干扰。),画出受噪声干扰的信号时域波形和频谱图; (3)采用窗函数法设计FIR低通滤波器,画出滤波器的频响特性图; (4)用所设计的滤波器对受噪声影响的信号进行滤波,画出滤波后语音信号的时域波形图和频谱图; (5)对滤波前后的信号进行对比,分析信号的变化;回放语音信号,并与原始语音信号对比
signal_processing
- 产生线性调频信号,可以是宽带,也可以是窄带信号。还有低通滤波器(A linear frequency modulated signal can be produced ,wideband or narrowband. There are also low-pass filters)