lock-in amplifier 中文意思是什麼
lock-in amplifier
解釋
鎖定放大器-
Digital lock - in amplifier based on dsp and sampling adc
的數字鎖定放大器 -
Choosing y type reflection fiber optic detector, this thesis create a tiny displacement - detecting sensor that is made up of led ( light emitting diode ), fiber optic detector, electric eye, lock - in amplifier, display and other electro circuits
本論文採用y型反射式光纖探頭設計製作了一種微位移測量裝置，它主要由發光二極體、光纖探頭、 、鎖相放大器、顯示器及相關電路組成。 -
The instrument is integrated with a multi - channel high precision open circuit potential measurement system for the ion selective electrode and a potentiostat used in voltammetry, an analog lock - in amplifier is also presented to measure the response of light addressable potential sensor
對于不同的測量技術，儀器中集成了用於測量電極的多通道高精度開路電壓測量系統和用於溶出伏安法測量的多路電化學測量系統，以及用於測量光尋址電位傳感器的鎖相放大器。 -
Realization of lock - in - amplifier software and parameter measurement
鎖相放大器的軟體實現與參數測量 -
Design of programme control lock - in - amplifier based on virtual instrument
基於虛擬儀器技術的程式控制鎖相放大器設計 -
The precise measurement of microwave antenna pattern with lock in amplifier
利用鎖定放大器實現微波天線方向圖的精確測量 -
According to the principle of correlation detection, an automatic measurement system for extinction ratio of polarizer consisted of monochromator and dsp lock - in amplifier and compurer is designed not only to eliminate the influence on measurement accuracy caused by drift of intensity of light source but also to obatain approximate extinction spectrum
摘要基於相干檢測原理設計了一套由單色儀、數字鎖相放大器和計算機聯合使用的透射式偏光鏡消光比智能化測試實驗系統，採用雙頻雙光路分光單探測器接收鎖相放大器分離信號比對法進行源補償測量，克服了光源光強漂移所帶來的影響；實現了可見光區消光比的精確自動測量，而且可以測得近似的消光光譜。 -
A computer controls the whole process of measurements by communicating with the lock - in amplifier via rs232 interface
計算機通過rs232介面與鎖相放大器通信，控制測量的全過程。 -
A lock - in amplifier is used to supply the driving signal and to detect the output signal corresponding to the sample ' s strain
使用鎖相放大器提供驅動信號，並同時檢測對應于樣品形變的輸出信號。 -
The core of the lock - in amplifier used to measure response of laps consists of a high precision modulator / demodulator and dds as signal generator
對于光尋址電位傳感器，我們設計了以高精度數據機件和數字頻率合成器件為核心的模擬鎖相放大器。 -
For the signals are very weak, the lock - in amplifier is employed to extract the signals in the circuit design. it can inhabit the noise in the most and maximize the signal - to - noise
因為信號十分微弱，所以在電路設計上採用鎖相放大器來提取信號，最大限度的抑制噪聲，提高系統的信噪比。 -
Using the home made device, the relationship between the 3 voltage and the heating frequency is obtained by lock - in amplifier, thus the thermal conductivity of the fluid is calculated with the least square fit method
自行研製了流體導熱系數的測量裝置，採用鎖相放大器獲取3電壓與頻率的關系，並藉助最小二乘法，算出待測試樣的導熱系數。 -
The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 %, which could meet the need of reference signal of the lock - in amplifier
實驗結果表明，經過優化后的多普勒調制器的輸出調制信號頻率的相對標準誤差達到了1 %左右，能夠滿足鎖相放大器對輸入參考信號頻率穩定度的要求。 -
Photoelectric detecting circuit is constituted of four parts, i / v conversion, lock - in amplifier, low - pass filter and operation
光電檢測電路由四部分組成，分別是i / v轉換環節、鎖相放大環節、低通濾波環節、運算環節。 -
Based the research on the laser beam drift feedback control technique, analysing the beam drift and its frequency components, a laser beam directional stability method is studied in the thesis in detail, with its measurement and control circuit system that combines the laser beam intensity modulation and the beam drift feedback control technique. in this method, at first the laser beam intensity is modulated with the acoustooptic modulator, then the lock - in amplifier is applied to detect and demodulate the modulating signal, at last a feedback control signal is generated by the dsp control circuit at last, including : 1
本文在原有的激光光束漂移量反饋控制準直技術的基礎上，對光束漂移量信號的數據和頻譜進行了分析，重點研究了一種集聲光調制光強與光束漂移量反饋控制準直技術於一體的激光光束方向穩定方法及其測控電路系統，該方法通過聲光調制實現光強調制，接著通過鎖相放大電路檢測並解調調制信號，然後通過dsp控制電路進一步對光束的漂移量進行反饋控制。
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