direct current signal 中文意思是什麼
direct current signal
解釋
直流信號-
In the thesis, a signal processing scheme of polarization - insensitive fiber optic michelson interferometric magnetic sensor is described : making the interferometer work near the quadrature with closed loop controlling working point method, the fundamental frequency component of the magnetic field sensing signals can be detected to measure the input direct current ( dc ) magnetic field by phase sensitive demodulation
本文主要介紹了偏振無關光纖michelson干涉型微弱磁場傳感器信號處理的方案:通過閉環控制工作點演算法使干涉儀工作在正交工作點處，再利用相敏檢波演算法提取傳感器輸出信號的基頻分量，以測量直流磁場的大小。 -
In gan hemt drain pulse current collapse experiments, drain current under pulse condition collapsed about 50 % than direct current condition and the pulse signal frequency affected little on current collapse. when gate voltage is small, the relationship between pulse width and drain current is i0 ( + t / 16 )
在ganhemt漏極脈沖電流崩塌測試中，發現脈沖條件下漏極電流比直流時減小大約50 % ;脈沖信號頻率對電流崩塌效應影響較小;當柵壓較小時，隨著脈沖寬度的改變漏極電流按i0 （ + t / 16 ）的規律變化。 -
Dc current signal : 0 - 2. 5a direct input ; if the current exceed 2. 5a it can adopt flow divider to transform into voltage signal whose full range is 75mv to input
直流電流信號： 02 . 5a直接輸入，超過2 . 5a採用分流器轉換成滿量程為75mv的電壓信號輸入。 -
Ac current signal : 0 - 5a direct input ; if the current exceed 5a it can adopt current transformer to transform into current signal whose full range is 100v to input
交流電流信號： 05a直接輸入，超過5a可採用交流電流互感器轉換成滿量程為5a的電流信號輸入 -
Ac current input : 05 a direct input, exceed 5 - a signal is converted to current signal input whose full scale is 5a by current transformer
交流電流輸入： 05a直接輸入，超過5a由電流互感器變換成滿刻度為5a的的電流信號輸入。 -
Ac current input : 05 a direct input, exceed 5 a signal is converted to current signal input whose full scale is 5 a by current transformer
交流電流輸入： 05a直接輸入，超過5a由電流互感器變換成滿刻度為5a的電流信號輸入。 -
Ac current input : 0 5a direct input, exceed 5a, current is transformed into current signal which full scale is 5a by current transformer to input
交流電流輸入： 0 5a直接輸入，超過5a由電流互感器變換成滿刻度為5a電流信號輸入。 -
The thesis first probably explains brushless direct current motor ( bldcm ), and discusses the related control methods, explains the background and meaning of back electromotive force ( back - emf ) which is used in the thesis. then the thesis expounds the basic component parts, the basic running principle, the running characteristic and transfer function of the bldcm. and then the thesis detailedly dissertates its research pivot : the simulation of bldcm system in matlab based on the method of back - emf and the control system of digital signal processor ( dsp ) based on the method of back - emf
本文首先對無刷直流電機進行了概述，並對其相關控制方法進行了討論，說明本文所採用反電動勢法的背景和意義;接著論述了無刷直流電機基本組成環節、基本工作原理、運行特性和傳遞函數，然後是詳述本文研究的重點:基於反電動勢法的matlab調速系統的模擬以及基於反電動勢法的dsp控制系統的實現。 -
One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system
第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。 -
In charter iii, the author designed a set of direct current bias and a schematics for measuring signal, by which the character of conduction of the laser plasma in electrical field caused by bias was studied
第三章中本文作者自己設計了一套直流偏壓裝置及信號測量裝置及方案，從激光等離子體在偏壓電場作用下的導通特性測量，研究了偏壓對激光等離子體空間膨脹過程的影響機理。 -
The system that electrical power is supplied by silicon - controlled, speed abjusted by direct current double loop - locked and controlled by microcomputer is the high acurracy digital system following the input signal
摘要微機控制的晶閘管供電的雙閉環直流數字調速系統是高精度復現輸入信號的數字隨動系統。 -
The power circuit of the system adopts the voltage frequency conversion structure of ac - dc - ac, and is composed of the commutation circuit, filter circuit and intelligence power module ( pm15rsh120 ). control circuit takes the dsp chip tms320lf2407 as core, including the pwm signal occurrence circuit, detect circuit of stator current and direct current voltage of generatrix, drive circuit of intelligence power module, detect circuit of speed, protect circuit of system etc. all of this builds the full digital vector control system of asynchronous motor
該系統的功率電路採用電壓型的交-直-交變壓變頻結構，由整流電路、濾波電路及智能功率模塊ipm （ pm15rsh120 ）逆變電路構成;控制電路以dsp晶元tms320lf2407為核心，加上pwm信號發生電路、定子電流檢測電路、直流母線電壓檢測電路、智能功率模塊驅動電路、速度檢測電路、系統保護電路等，構成了功能齊全的異步電機全數字化矢量控制系統。 -
The paper sums up the intelligent monitoring actuality and trend of the dc panel. by analyzing many method ' s advantage and disadvantage of the leaking electricity inspection, the paper brings forward a method of the leaking electricity inspection by injecting the direct current signal
本文總結了直流屏智能監控的現狀和發展趨勢。通過對漏電檢測多種方法的優缺點的分析，提出了注入直流信號進行漏電檢測的方法。
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