查询词典 analog experiment

a kind of design project of multifunction electric power quality gauged instrument based on virtual instrument is put forward in this article.this system integrates virtual instrument programming and power electronics together,to realize diverse signals of current electric power quality field allin one.the integrated signal generator unit which carries out the collection of high speed digital data,d/ a conversion and analog output in four channels,unsymmetrical synchro control fifo etc.by fpga are introduced,the flow of electric power system various signal which generates by vc programming is elaborated,and the structural design of signal amplification unit is analysed.the experiment text result shows that this gauged instrument has attained current advanced high grade of accuracy and it will accelerate the steps of electric power quality calibration because of its accuracy and versatility.

摘 要：提出一种基于虚拟仪器技术的多功能电能质量标定仪的设计方案，采用虚拟仪器编程技术和电力电子技术相结合实现集目前电能质量领域的多样信号于一体。介绍采用fpga实现高速数字量采集、d/a转换及4通道模拟量输出、非对称同步控制fifo等的集成信号发生单元，阐述利用vc编程实现的电力系统多样信号的产生流程，分析信号放大单元的结构设计。实验测试结果表明该标定仪达到目前先进的高精度等级，由于其准确性和多功能性将加快电能质量标定的步伐。

In order to meet the higher requirements for some scientific experiment due to site conditions limitation for data acquisition system's volume,power consumption and reliability,a real-time data acquisition system based on TMS320F2812 chip was designed,which could carry out real-time acquiring and recording for analog signals output from power system.

为了满足有些科学实验由于现场条件的限制对数据采集系统的体积、功耗以及可靠性等方面所提出的较高要求，设计了一种基于 TMS320F2812芯片的实时数据采集系统，该系统可对电力系统所输出的模拟电压信号进行实时的采集和记录。

The feasibility of the analog birefringent structure is verified through an experiment.

实验中，用单级模拟双折射模块验证了该结构的可行性。

At last, 2KVA - experimental prototypes of AC power supplies of multiple-loop analog and digital control system have been made. Fast dynamic response and load compatibility have been verified by the experiment of step change in the load and under rated full-wave diode bridge rectifier load.

最后各研制了一台2KVA的多环模拟控制系统逆变电源实验样机和数字化控制系统逆变电源实验样机，切换负载实验和负载适应性实验分别验证了逆变电源系统具有良好的动态性能和负载适应性。

This paper firstly adopts the experiment of analog simulation to studying the stability of the building foundation with goaf.

对于老采空区在建筑物荷载作用下的地基稳定性评价、采空区地基处理范围的界定等方面的研究成果甚少，尚未见系统的研究报道。

The results of circuit simulation and hardware experiment show that it is feasible to realize the RLC second-order filters using the analog grounded or floating ideal inductor realized by the gyrator proposed here.

电路仿真和硬件电路实验研究结果表明：用本文提出的回转器实现理想接地、浮地电感并应用于二阶滤波器的实现中是可行的。

This dissertation introduces the whole scheme、the hardware electro circuit design and software design, the result of experiment on salinometer is preferred at the end of the dissertation. Salinometer is base on SOPC technology, and use digital technology to design circuit: the excitation source for balance bridge is generated by digital method, its shape、amplitude and frequency can be control by digital signal, the standard branch of bridge is composed of three digital-analog-conversion, and uses the method of successive approximation to regulate the balance of bridge.

盐度计以SOPC技术为基础，通过数字化方式设计测量电路：电桥的激励源由数字化方式产生，激励源的波形、幅值和频率等可由数字量控制；平衡电桥标准支路由3个数模转换器组合实现，测量时以逐次逼近的方式调整电桥的平衡度；检测电桥平衡度的高灵敏度数字检流计同样以数字化方式设计，它的增益由程序控制，将电桥的输出电压数字化，以软件判断电桥平衡度。

Dr. sharp, himself, was the subject of an experiment in which pulsed microwave audiograms, or the microwave analog of the sound vibrations of spoken words, were delivered to his brain in such a way that he was able to understand the words that were spoken.

军队和特工利用这种装置，可能会包括通过脑内的声音驱使实验对象疯狂，使他抹黑。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。