共查询到18条相似文献,搜索用时 359 毫秒
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为解决目前教学用分光计操作中存在的诸多缺陷, 我们改进了教学用分光计装置, 使它更易于调节和
演示、 让学生更直观地了解分光计的调节及测量过程 相似文献
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分析了分光计实验教学中的难点和学生在分光计调节中经常碰到的问题,重点分析了望远镜和双面镜组成的成像系统的成像光路图像以及两像移动的规律,提出了分光计实验教学中需要指导学生运用光路知识分析具体的实验现象从而指导实验操作,对教学实践具有良好的指导意义和参考价值。 相似文献
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针对传统JJY型分光计调节中的困难,在确保分光计原有结构和功能不变的前提下,设计、制作出可实现分光计简易调节的辅助装置,极大地提高了教学效率。 相似文献
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工科学生在做分光计实验时,经常出现“拖堂”现象,这是一个棘手的老问题,它的“症结”何在?本人对此做了粗浅的探讨,并在教学中取得了较好的效果,从根本上克服了“拖堂”现象。一、分光计实验教材普遍存在着一个问题,就是对分光计调节步骤的细节谈得很多,缺乏“粗线条”,目标不明确,造成学生在调节过程中的盲目性. 相似文献
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在分光计调节实验教学过程中,在"粗调"过程引入水准仪的辅助调节,在"细调"过程中利用三棱镜和"减半逐步逼近调节法",大大提高了学生调节分光计的速度,提高了实验效率。 相似文献
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Software for a data acquisition system of modern one- and two-dimensional position-sensitive detectors with delay-line readout, which includes a software interface to a new electronic module De-Li-DAQ-2D with a USB interface, is presented. The new system after successful tests on the stand and on several spectrometers of the IBR-2 reactor has been integrated into the software complex SONIX+ [1]. The De-Li- DAQ-2D module [2] contains an 8-channel time-code converter (TDC-GPX) with a time resolution of 80 ps, field programmable gate array (FPGA), 1 Gbyte histogram memory and high-speed interface with a fiber-optic communication line. A real count rate is no less than 106 events/s. The De-Li-DAQ-2D module is implemented in the NIM standard. The De-Li-DAQ-2D module can operate in two modes: histogram mode and list mode. 相似文献
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针对当前大部分超短超强激光实验中真空光路调控效率低、操作方式繁琐等缺点,设计了一种基于LabVIEW软件开发平台的集成化实验光路调节系统来实现对光路高效便捷的调控。该系统由光斑位置采集单元、光斑位置调节单元和计算机等三部分构成,其设计思路是利用激光光斑映射在CCD上的空间位置,实现光路指向定位的反馈,根据反馈信息设计人机交互界面实现光路指向的调控。该系统成功实现多线程并行运行,并将不同型号不同通讯方式的多个位移台控制器集成于同一界面控制。实验证明,与常用的手动调节系统相比,该系统对实验光路的调控更方便快捷,调节效率更高。 相似文献
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An inexpensive electronic circuit module has been designed and constructed to replace the “field scan potentiometers” of magnet power supplies used in old EPR spectrometers. Linearly varying AC and DC error voltages are generated by this circuit module. Apart from the obvious advantages gained by changing the mechanically controlled scanning to digitally controlled electronic scanning, this circuit also has the ability to scan selected field regions, with facility to go from one selected field region to another field region rapidly and automatically, (similar to the “tab” facility in a typewriter) thereby saving the time spent in the collection of useful data. In our design the bouncing problem associated with “key” operations has been elimitated by the use of appropriate software control. We have evaluated the performance of this circuit module by using it with a Varian Fieldial power supply. 相似文献
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利用通用电路模型程序Pspice,建立了包含60级感应腔串联的单路直线型脉冲变压器(LTD)电路模型,次级传输线采用去离子水绝缘,计算分析了感应腔触发时序对LTD输出参数的影响。结果表明,控制触发时序能够显著改变LTD型驱动源的输出参数。当控制触发时序使得各级感应腔内的开关在闭合前承受一定过电压时,LTD输出电流比单级感应腔同等条件下的输出电流具有更短前沿和更高幅值。假定LTD开关过压击穿电压为400 kV,通过触发时序的优化可提高LTD装置输出性能:前沿从56.5 ns减少至12.5 ns,峰值从1 018 kA提高至1 340 kA。 相似文献
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分析了电加热器对流动氦气的加热过程,从能量平衡和热传导的角度建立了系统数学模型,用解析的方法表达了热量的传递过程,得到了传递函数。用Matlab的Simulink模块搭建了PID的控制框架,用积分分离的策略改进了温度控制的效果。仿真结果显示流体在进口温度不断变化的情况下,通过加热器的功率调节获得了比较稳定的气体出口温度,表现出了良好的控制结果。 相似文献
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Damir Sorak Lars Herberholz Sylvia Iwascek Sedakat Altinpinar Frank Pfeifer Heinz W. Siesler 《应用光谱学评论》2013,48(2):83-115
Abstract: Recently, miniaturization of Raman, mid-infrared (IR), and near-infrared (NIR) spectrometers has made substantial progress. Though mid-infrared systems are based exclusively on attenuated total reflection (ATR) measurements, near-infrared spectrometers operate in the diffuse reflection or transmission mode. The reduction in size, however, must not be accompanied by deterioration in measurement performance, and portable instrumentation will only have a real impact on quality and process control if Raman, IR, and NIR spectra of comparable quality to laboratory spectrometers can be obtained. In the present communication, a short overview on the building principles of novel handheld systems will be provided and the results of qualitative and quantitative analyses of selected liquid and solid sample systems obtained with these Raman, Fourier transform infrared (FTIR), and NIR spectrometers will be evaluated in terms of their comparability with laboratory instruments and their suitability for on-site and field measurements. 相似文献