Description: 采用12位MAX 197对外部信号采样。采用全周波傅立叶积分算法，对采样信号进行处理，对电力系统的电压有效值、功率等特征量进行实时在线监测；采用全数字测量法测量相位差；并采用自适应技术调整采样间隔，消除非同步采样对计算造成的误差，利用PIC18F458捕获功能实时监测电力系统频率波动，修订采样间隔。分析了各量的测量误差，均达到标准。并提供友好的人机交互界面。-used 12 MAX 197 pairs external signal sampling. Using Fourier-Cycle Integration Algorithm for the sampling signal processing, power systems to the RMS voltage, power characteristics of the volume in real-time on-line monitoring; All digital measuring method phase difference; Adaptive technology and the sampling interval, the elimination of non-synchronous sampling of the calculation error using PIC18F458 capture real-time monitoring of power system frequency fluctuations amended sampling interval. The analysis of the measurement error are up to standard. And to provide a friendly man-machine interface. Platform: |
Size: 9038 |
Author:金永州 |
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Description: A new cable fault location method based on
wavelet reconstruction is proposed. In this method the
difference between the currents of faulty phase and sound
phase under the high voltage pulse excitation is used as the
measured signal and is decomposed in multi-scale by wavelet
transform, then reconstructed in single scale. Comparing with
traditional fault location method by travelling wave, the
presented method will not be interfered by the reflected wave
from the branch joint of cables or from other positions where
the impedances are not matched and not be influenced by fault
types, otherwise, the reflected waves can be recognized even
the faulty position is near to the measuring terminal, at the
same time, the influence of the wave speed uncertainty can be
reduced. The correctness of the proposed method is proved by
simulation results.
Platform: |
Size: 76327 |
Author:213 |
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Description: 采用12位MAX 197对外部信号采样。采用全周波傅立叶积分算法，对采样信号进行处理，对电力系统的电压有效值、功率等特征量进行实时在线监测；采用全数字测量法测量相位差；并采用自适应技术调整采样间隔，消除非同步采样对计算造成的误差，利用PIC18F458捕获功能实时监测电力系统频率波动，修订采样间隔。分析了各量的测量误差，均达到标准。并提供友好的人机交互界面。-used 12 MAX 197 pairs external signal sampling. Using Fourier-Cycle Integration Algorithm for the sampling signal processing, power systems to the RMS voltage, power characteristics of the volume in real-time on-line monitoring; All digital measuring method phase difference; Adaptive technology and the sampling interval, the elimination of non-synchronous sampling of the calculation error using PIC18F458 capture real-time monitoring of power system frequency fluctuations amended sampling interval. The analysis of the measurement error are up to standard. And to provide a friendly man-machine interface. Platform: |
Size: 9216 |
Author:金永州 |
Hits:
Description: A new cable fault location method based on
wavelet reconstruction is proposed. In this method the
difference between the currents of faulty phase and sound
phase under the high voltage pulse excitation is used as the
measured signal and is decomposed in multi-scale by wavelet
transform, then reconstructed in single scale. Comparing with
traditional fault location method by travelling wave, the
presented method will not be interfered by the reflected wave
from the branch joint of cables or from other positions where
the impedances are not matched and not be influenced by fault
types, otherwise, the reflected waves can be recognized even
the faulty position is near to the measuring terminal, at the
same time, the influence of the wave speed uncertainty can be
reduced. The correctness of the proposed method is proved by
simulation results.
Platform: |
Size: 75776 |
Author:213 |
Hits:
Description: 本文提出了采用数字式正交检波技术得到I、Q通道的方法，以此来测量相位，获取传感信息，很好地解决了在声表面波无线传感器测量系统中测量时间差的精度低的问题。-This paper presents the use of digital quadrature demodulation technology I, Q-channel approach, as a means of measuring phase, to obtain sensor information, a good solution to a surface acoustic wave in wireless sensor measurement system to measure the time difference the problem of low accuracy . Platform: |
Size: 290816 |
Author:关成 |
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Description: 低频数字式相位测试仪，本设计给出了以凌阳16位单片机Spce061A为核心的数字式相位测量的基本原理与实现方案。该系统由相位测量仪、数字式移相信号发生器和移相网络三个模块构成，分别由两块单片机独立地实现控制与显示功能。采用DDS技术生成两路正弦波信号，并通过改变存储器中数据读取的起始地址来实现数字移相的功能，用Ф-T变换技术来实现相位差的测量，使得测量分辨率精确到0.1º ，测得的频率与相位差值送入LCD进行显示，加入红外键盘以及语音播报的功能，使得系统具有智能化、人性化的特色。-Low-frequency digital phase tester, the design is given to SPCE061A Sunplus 16-bit single-chip microcomputer as the core of digital phase measurement and realization of the basic principles of the program. The system consists of phase-measuring instrument, digital shift believe that its generator and phase-shifting network of three modules, respectively, by two independent single-chip control and display functions. Using DDS technology to generate two sinusoidal signals, and by changing the data memory read start address to the realization of digital phase-shift function, with Ф-T transform technique to achieve the phase difference measurement, making accurate measurement resolution to 0.1 º , the measured frequency and phase difference value into the LCD display by adding infrared keyboard and voice broadcast function, the system has intelligent, user-friendly features.
Platform: |
Size: 269312 |
Author:shiyan |
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Description: 本程序利用FFT算法来测量同频正弦之间的相位差，分辨率可达0.01度.-This program using FFT algorithm for measuring the phase difference between two sine wave signals with the same frequency. Platform: |
Size: 362496 |
Author:LiangYurong |
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Description: xwch_test.m是主测试文件；biaoji.mat存放滤波器系数；xiangweicha.m用FFT计算相位差。
仿真框架为：
1.标记信号和双音信号续接作为发送信号；
2.对双音中一个频率分量的相位做偏移，再经过一个低通滤波器（引入线性相位，模拟收发不能同步测量现象）后，作为收到的信号；
3.用一个检测信号对收发信号进行相关运算；
4.画出收发信号以及相关处理后的信号。找出相关信号的那个尖点，从而推算出收发双音信号0相位点；
5. 输入0相位点位置，计算相对相位差。-xwch_test.m is the main test file biaoji.mat store filter coefficients xiangweicha.m calculated using FFT phase difference. Simulation framework: 1. Mark signals and then as a two-tone signal continued to send signals 2. On a two-tone frequency components of the phase shift to do, and then through a low pass filter (the introduction of linear phase, simulation can not simultaneously send and receive measuring the phenomenon), the as received signal 3. using a detection signal of the transceiver signal correlation operation 4. draw send and receive signals and related processed signal. Correlated signal of the cusp, which calculate the two-tone signal transceiver 0 phase point 5. Enter 0 phase point position, calculate the relative phase difference. Platform: |
Size: 51200 |
Author:曹艳平 |
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Description: VHDL,简易音频数字相位表的设计与实现 数字相位测量仪在工业领域中经常用到的一般测量工具，主要应用与同频率正弦信号间的相位差的测量显示。
本系统采用FPGA实现测量的核心部分，主要由数字鉴相、累加计数器、控制器以及寄存与显示译码电路组成。该系统硬件电路简单，整个系统采用硬件描述语言VHDL作为系统内部硬件结构的描述手段，在XILINX公司的ISE9.1的软件支持下完成。可以对20Hz~20kHz频率范围内的音频信号进行采样鉴相处理，并将数据传回FPGA进行相位差计数累加、测量运算，最后送显示译码电路显示，测相范围为 ，相位测量误差 < 。
经测试结果验证，本系统充分利用FPGA对数据的高速处理能力，是系统设计高效、可靠，处理速度快，稳定性高，易于实现。
-VHDL, simple audio digital phase Table Design and Implementation of the digital phase meter general measurement tools are often used in the industrial field, the measurement of the phase difference between the main application with the same frequency sinusoidal signal. The system uses the FPGA implementation of the core part of the measurement, mainly by the digital phase, cumulative counter, the decoding circuit of the controller as well as storage and display. The system hardware circuit is simple, and the entire system using hardware description language VHDL system means a description of the internal hardware structure, completed in the XILINX company ISE9.1 software support. The audio signal in the frequency range of 20Hz ~ 20kHz sampling KAM-phase process, and the data returned FPGA retardation counted accumulation measuring operation, and finally sent to the decoding circuit, the scope of the measurement phase, the phase measurement error < . The test results verify the full u Platform: |
Size: 1367040 |
Author:张学仁 |
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Description: 基于labview的多重自相关算法测量低信噪比条件下两路正弦波的相位差-Based on the phase difference between two sine wave labview multi the autocorrelation algorithm measuring low signal-to-noise ratio conditions Platform: |
Size: 22528 |
Author:罗知亮 |
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Description: 干涉测向仪通过测量入射波到达天线阵列中单元天线之间的相位差,决定入射波的入射角-Interferometer by measuring the incident wave direction finder antenna array element antenna reaches the phase difference between the incident angle of incidence of the decision Platform: |
Size: 2048 |
Author:仲笙 |
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Description: 干涉测向仪通过测量入射波到达天线阵列中单元天线之间的相位差,决定入射波的入射角-Interferometer by measuring the incident wave direction finder antenna array element antenna reaches the phase difference between the incident angle of incidence of the decision Platform: |
Size: 2048 |
Author:仲笙 |
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Description: STM32单片机，采用数字相关法测量两路波的相位差，内含工程，进行了模拟数据测试通过，稍微修改即可使用，并附上了理论文档。-STM32 microcontroller, using digital Correlation Method for Measuring the phase difference between two waves, including engineering, tested by simulated data, you can use slightly modified, with a theoretical document. Platform: |
Size: 7127040 |
Author:奇诺 |
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Description: MSP430单片机根据相位差测功率因数程序，并用5110显示屏显示-MSP430 single chip microcomputer program according to the phase difference measuring power factor, and 5110 display shows Platform: |
Size: 37888 |
Author:郑女士 |
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