1)phase-change detection相位差检测
1.Methods: A phase-change detection unit based on RF Lock-in amplifier SR844 was designed at the frequency of 1 MHz,consisting of pre-amplifier and narrow bandwidth filter.目的:实现脑磁感应成像系统中的单通道高精度相位差检测功能。
英文短句/例句
1.Failure Detection and Calibration Algorithm of Coriolis Mass Flowmeter科氏质量流量计相位差检测方法研究
2.Study on Using Correlation to Detect Phase Difference in Coriolis Flow Meter基于相关法的相位差检测方法在科氏质量流量计中的应用研究
3.Differentially Coherent Detection and Phase Compensation Algorithm in Underwater Acoustic Communication水声通信中差分相干检测及其相位补偿方法
4.Research of Detecting Moving Targets in SAR Imagery by Phase Error Estimation;基于相位误差估计的SAR动目标检测技术研究
5.Theoretical Calculation and Experimental Detection of Phase Shift in Our Single-channel BMIT单通道BMIT系统中相位差的理论计算与实际检测
6.Cycle-Slip of Carrier Phase Double-Difference Based on Wavelet Analysis基于小波分析的载波相位双差周跳检测
7.An Algorithm of Phase Difference Measurement Based on Fourier Series with Application in Detection of MOA基于Fourier级数的相位差算法在MOA检测中的应用
8.Improved algorithm for DS-QPSK phase error detection and its digital implementationDS-QPSK相位误差检测算法改进与数字化实现
9.Differential microwave phase detector based on MEMS technology基于MEMS技术的差分式微波信号相位检测器
10.Phase Deference Measurement in MultisimMultisim仿真中的相位差测量
11.A Novel Method of Measuring Phase Deviation Signal for Coriolis Mass Flow Meter一种新颖的科氏质量流量计相位差信号的检测方法
12.Technology of Direction-finding with Phase Interferometers and Passive Location with Phase Variations干涉仪测向与相位差变化率定位技术
13.The Balanced Dual-mixer Heterodyne for Measurement of Phase Difference between two Coherent Lights;对称双混频外差法测量相干光的相位差
14.Rules for inspection of form and position tolerancesGB/T1958-1980形状和位置公差检测规定
15.Design of detecting circuit for differential capacitive small displacement sensor差动电容小位移传感器检测电路设计
16.An application of color similarity measurement in color detection颜色相似性度量在色差检测中的应用
17.magnetoelectric phase difference torque measuring instrument磁电相位差式转矩测量仪
18.Research on Precision Measurement of Phase Difference;高精度数字式相位差测量系统的研究
相关短句/例句
phase difference detection相位差检测
1.Based on the analysis of conventional phase difference detection method,a new algorithm of phase difference detection is presented according to Fourier series decomposition method and the characteristic that inner product of two orthogonal vectors in a linear space is zero.在分析现有相位差检测算法的基础上,应用Fourier级数分解方法与线性空间中正交向量内积为零的特性,推导出了一种新的相位差检测算法。
3)Differential Phase Detection(DPD)差分相位检测(DPD)
4)phase error detection相位误差检测
1.Improved algorithm for DS-QPSK phase error detection and its digital implementationDS-QPSK相位误差检测算法改进与数字化实现
2.This paper,in combination with high-speed satellite communication application,first studies the structural model of the carrier recovery loop based on maximum posteriori probability estimation principle,and then analyzes in-depth the features of the adopted carrier phase error detection algorithm,and finally describes the simulation .结合高速卫星通信的应用,文中首先对基于最大后验概率估计准则载波恢复环的结构模型进行了研究,然后对所采用的载波相位误差检测算法的特性进行了深入的分析,最后对载波恢复系统中尤其重要的环路鉴相特性进行了计算机仿真,给出了环路性能试验分析结果。
5)differential phase detection差分相位检测
1.Aiming to the slow fading channel which consists of frequency selectivity and carrier frequency offset(CFO),the closed-form expression for the BER,which is derived from one-bit differential phase detection(1-DPD) SFH/GMSK communication system,is obtained.针对存在频偏和频率选择性的慢衰落信道,分析给出了1比特差分相位检测SFH/GMSK系统的误码率闭式解;在此基础上,研究了载波噪声比、载波延迟比与误码率的关系,探讨了高载波噪声比下频偏和跳频速率对误码率的影响;利用Monte Carlo仿真验证了闭式解的准确性。
6)measuring method of phase deviation signal相位差检测方法
延伸阅读
相位差测量 两同周期正弦电量对应点间角度差值的测量。此两正弦电量可以同为电压、电流，或一为电压、一为电流等。对应点常取正弦电量由负到正的过零点，相当于正弦电量函数的初相角。相位差的单位是度或弧度，正、负号表示领先或滞后关系。 待测相位差的正弦电量的频率范围很广，因此采用的测量方法和仪器一般随频率的高低来选择。常用的方法是直接法和间接法。 直接法 使用专用的仪表如指针式相位表、数字相位表，或采用阴级示波器来测量相位差。采用阴极示波器时，将两同频正弦电压信号分别加到示波器的X、Y轴，得到如图1所示的椭圆图形,则两正弦电压之间的相位差∮＝arc sin(b/α)。这一方法不能判断两信号哪一个领先或滞后，并且在∮值接近零时，椭圆也退化接近成为一条直线，即b值很小,所以∮值很难测准。 间接法 通常采用三电压表法。一般要求两电压信号有一公共点（设为a点），当分别测出两信号电压Uab、Uca,以及两电压的差值Ubc后,可画出如图2所示的电压三角形。按余弦定理，两信号电压间的相位差当∮很小时,可将Uab或Uca中较大的一个信号电压分压，使分压后两信号的数值相等。如此,在测得Uab(=Uca)及Ubc后，即可得到 (弧度)
