lock-in amplifiers造句
例句与造句
- Digital lock - in amplifier based on dsp and sampling adc
的数字锁定放大器 - Lock - in amplifiers
锁定放大器 - A computer controls the whole process of measurements by communicating with the lock - in amplifier via rs232 interface
计算机通过rs232接口与锁相放大器通信，控制测量的全过程。 - A lock - in amplifier is used to supply the driving signal and to detect the output signal corresponding to the sample ' s strain
使用锁相放大器提供驱动信号，并同时检测对应于样品形变的输出信号。 - Photoelectric detecting circuit is constituted of four parts , i / v conversion , lock - in amplifier , low - pass filter and operation
光电检测电路由四部分组成,分别是i / v转换环节、锁相放大环节、低通滤波环节、运算环节。 - It's difficult to find lock-in amplifiers in a sentence. 用lock-in amplifiers造句挺难的
- 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
对于光寻址电位传感器，我们设计了以高精度调制解调器件和数字频率合成器件为核心的模拟锁相放大器。 - 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
因为信号十分微弱，所以在电路设计上采用锁相放大器来提取信号，最大限度的抑制噪声，提高系统的信噪比。 - 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
自行研制了流体导热系数的测量装置，采用锁相放大器获取3电压与频率的关系，并借助最小二乘法，算出待测试样的导热系数。 - 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
实验结果表明，经过优化后的多普勒调制器的输出调制信号频率的相对标准误差达到了1 %左右，能够满足锁相放大器对输入参考信号频率稳定度的要求。 - 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
本论文采用y型反射式光纤探头设计制作了一种微位移测量装置，它主要由发光二极管、光纤探头、 、锁相放大器、显示器及相关电路组成。 - At the same time , this thesis also did the reasonably research about the weak light telecommunication technique , and designed an optic - electricity signal handling system , in which the lock - in amplifier is the core . the gain of this system could be 10 ^ 6 , and snr ( signal - to - noise ) could be 1000 : 1
同时，对微弱光电信号处理技术也做了比较深入的研究，设计制作出以锁相放大器为核心的光电信号处理系统，放大倍数可达10 ~ 6 ，信噪比提高到1000 ： 1 。 - 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
对于不同的测量技术，仪器中集成了用于测量电极的多通道高精度开路电压测量系统和用于溶出伏安法测量的多路电化学测量系统，以及用于测量光寻址电位传感器的锁相放大器。 - 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
摘要基于相干检测原理设计了一套由单色仪、数字锁相放大器和计算机联合使用的透射式偏光镜消光比智能化测试实验系统，采用双频双光路分光单探测器接收锁相放大器分离信号比对法进行源补偿测量，克服了光源光强漂移所带来的影响；实现了可见光区消光比的精确自动测量，而且可以测得近似的消光光谱。 - 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馈控制准直技术的基础上,对光束漂移量信号的数据和频谱进行了分析,重点研究了一种集声光调制光强与光束漂移量反馈控制准直技术于一体的激光光束方向稳定方法及其测控电路系统,该方法通过声光调制实现光强调制,接着通过锁相放大电路检测并解调调制信号,然后通过dsp控制电路进一步对光束的漂移量进行反馈控制。