1)phase-change detection相位差檢測
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:實現腦磁感應成像系統中的單通道高精度相位差檢測功能。
英文短句/例句
1.Failure Detection and Calibration Algorithm of Coriolis Mass Flowmeter科氏質量流量計相位差檢測方法研究
2.Study on Using Correlation to Detect Phase Difference in Coriolis Flow Meter基于相關法的相位差檢測方法在科氏質量流量計中的應用研究
3.Differentially Coherent Detection and Phase Compensation Algorithm in Underwater Acoustic Communication水聲通信中差分相干檢測及其相位補償方法
4.Research of Detecting Moving Targets in SAR Imagery by Phase Error Estimation;基于相位誤差估計的SAR動目標檢測技術研究
5.Theoretical Calculation and Experimental Detection of Phase Shift in Our Single-channel BMIT單通道BMIT系統中相位差的理論計算與實際檢測
6.Cycle-Slip of Carrier Phase Double-Difference Based on Wavelet Analysis基于小波分析的載波相位雙差周跳檢測
7.An Algorithm of Phase Difference Measurement Based on Fourier Series with Application in Detection of MOA基于Fourier級數的相位差算法在MOA檢測中的應用
8.Improved algorithm for DS-QPSK phase error detection and its digital implementationDS-QPSK相位誤差檢測算法改進與數字化實現
9.Differential microwave phase detector based on MEMS technology基于MEMS技術的差分式微波信號相位檢測器
10.Phase Deference Measurement in MultisimMultisim仿真中的相位差測量
11.A Novel Method of Measuring Phase Deviation Signal for Coriolis Mass Flow Meter一種新穎的科氏質量流量計相位差信號的檢測方法
12.Technology of Direction-finding with Phase Interferometers and Passive Location with Phase Variations干涉儀測向與相位差變化率定位技術
13.The Balanced Dual-mixer Heterodyne for Measurement of Phase Difference between two Coherent Lights;對稱雙混頻外差法測量相干光的相位差
14.Rules for inspection of form and position tolerancesGB/T1958-1980形狀和位置公差檢測規定
15.Design of detecting circuit for differential capacitive small displacement sensor差動電容小位移傳感器檢測電路設計
16.An application of color similarity measurement in color detection顏色相似性度量在色差檢測中的應用
17.magnetoelectric phase difference torque measuring instrument磁電相位差式轉矩測量儀
18.Research on Precision Measurement of Phase Difference;高精度數字式相位差測量系統的研究
相關短句/例句
phase difference detection相位差檢測
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.在分析現有相位差檢測算法的基礎上,應用Fourier級數分解方法與線性空間中正交向量內積為零的特性,推導出了一種新的相位差檢測算法。
3)Differential Phase Detection(DPD)差分相位檢測(DPD)
4)phase error detection相位誤差檢測
1.Improved algorithm for DS-QPSK phase error detection and its digital implementationDS-QPSK相位誤差檢測算法改進與數字化實現
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 .結合高速衛星通信的應用,文中首先對基于最大后驗概率估計準則載波恢復環的結構模型進行了研究,然后對所采用的載波相位誤差檢測算法的特性進行了深入的分析,最后對載波恢復系統中尤其重要的環路鑒相特性進行了計算機仿真,給出了環路性能試驗分析結果。
5)differential phase detection差分相位檢測
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.針對存在頻偏和頻率選擇性的慢衰落信道,分析給出了1比特差分相位檢測SFH/GMSK系統的誤碼率閉式解;在此基礎上,研究了載波噪聲比、載波延遲比與誤碼率的關系,探討了高載波噪聲比下頻偏和跳頻速率對誤碼率的影響;利用Monte Carlo仿真驗證了閉式解的準確性。
6)measuring method of phase deviation signal相位差檢測方法
延伸閱讀
相位差測量 兩同周期正弦電量對應點間角度差值的測量。此兩正弦電量可以同為電壓、電流，或一為電壓、一為電流等。對應點常取正弦電量由負到正的過零點，相當于正弦電量函數的初相角。相位差的單位是度或弧度，正、負號表示領先或滯后關系。 待測相位差的正弦電量的頻率范圍很廣，因此采用的測量方法和儀器一般隨頻率的高低來選擇。常用的方法是直接法和間接法。 直接法 使用專用的儀表如指針式相位表、數字相位表，或采用陰級示波器來測量相位差。采用陰極示波器時，將兩同頻正弦電壓信號分別加到示波器的X、Y軸，得到如圖1所示的橢圓圖形,則兩正弦電壓之間的相位差∮＝arc sin(b/α)。這一方法不能判斷兩信號哪一個領先或滯后，并且在∮值接近零時，橢圓也退化接近成為一條直線，即b值很小,所以∮值很難測準。 間接法 通常采用三電壓表法。一般要求兩電壓信號有一公共點（設為a點），當分別測出兩信號電壓Uab、Uca,以及兩電壓的差值Ubc后,可畫出如圖2所示的電壓三角形。按余弦定理，兩信號電壓間的相位差當∮很小時,可將Uab或Uca中較大的一個信號電壓分壓，使分壓后兩信號的數值相等。如此,在測得Uab(=Uca)及Ubc后，即可得到 (弧度)
