显微物镜数字剪切波面像差评价仪

本文介绍了所开发的显微物镜像质评价仪,它利用数字波面剪切干涉技术实现显微物镜轴上、轴外单色波像差的实时检测,提出了用有限元解析二维剪切波面的新算法并应用于该评价仪中,最后对实验所测得的数据进行了对比分析,其精度可达λ／２０。     

复印物镜像质评价的光学传递函数标准及其测试

本文提出一种复印物镜像质评价的光学传递函数标准,并简单介绍了测试方法和测试装置的组成。     

光学传递函数测试仪的现状和发展趋势

光学传递函数被公认为目前评价光学系统成像质量比较客观、有效的方法。给出光学传递函数的基本理论,介绍了目前国内外主要光学传递函数测试仪的数学模型、测试原理、基本结构和主要性能,并阐述了今后光学传递函数测试仪的发展趋势。     

智能化气动型砂多功能测试仪的研制

目前国内常用的型砂强度测试仪器大都能够实现各种湿强度、干强度和表面强度的测定。但是存在的问题是仪器式样陈旧,结构不完善,液压加载部件容易漏油,缺乏自动化控制。而且更加关键的问题是不能测定型砂的塑性和试样破坏时的变形量而无法得出有关型砂韧性的信息。为此,清华大学开展了新型智     

多功能万用极性电子测试仪的研发

竣工检验工作人员在日常工作中经常同时使用到多功能万用表和互感器接线极性测试仪,但目前电力系统甚至整个电力市场上并没有一部能同时实现万用表功能和互感器接线极性测试功能的仪表,鉴于此,研发了一款多功能万用极性电子测试仪,并将其与现用互感器极性测试仪进行了对比。     

应用M38C3单片机构成多功能交流电量测试仪

多功能交流电量测试仪是市场上广泛需求的产品。本文介绍了一种新型的单片机M38C3和应用M38C3单片机构成的多功能交流电量测试仪。     

多功能机械传动参数测试仪设计

设计了一种多功能机械传动参数测试仪。该测试仪以C8051F060单片机为核心,提供多个模拟量和数据量的采集端口,通过串行总线与PC机连接进行数据交互,由PC机完成数据处理和曲线显示。应用结果表明,该测试仪达到了设计要求,具有一定的实用性和推广价值。     

多功能数控光学表面加工系统

介绍了自行研制的多功能计算机控制精密光学表面加工系统“ＺＤＣＣＯＳ”及其机械结构、ＣＮＣ系统的硬件和软件。该系统具备５个运动自由度（４轴数控、１轴浮动）,采用双旋转磨头,在数字波面干涉仪的配合下能够完成多种光学非球面的加工任务     

网络仪器与通信协议一致性测试技术

论文提出了将形式化方法引入网络仪器设计中的观点，使设计者在设计仪器网络接口时，拥有一套规范的协议设计、验证、实现、测试的方法，使开发者尽可能早的获知协议缺陷，最大限度的检测和纠正缺陷，进行协议的完善，同时缩短了协议开发周期，提高了协议实现的正确性。     

Three‐dimensional optical transfer function in differential confocal microscopy

To reveal the fundamental characteristics of differential confocal microscopy (DCM), its imaging properties were analysed by studying the 3D optical transfer function (OTF). The zero transfer at zero frequency along the axial direction in DCM, which has not been well understood and is considerably different from the transfer behaviour in conventional confocal microscopy (CM), was elucidated. The integral expressions of the OTFs for CM and DCM and the subsequent simulation results showed that DCMs have higher transfer capability than CM in the axial direction at medium and high frequencies. Conventionally, the relative optimal defocusing amount in DCMs are determined through calculations of the gradient of the point spread functions in the spatial domain. In contrast, in this study, the OTF performances were compared and the optimal defocusing amount was found to be between 5 and 7.     

Construction and testing of a nanomachining instrument

This paper presents a nanomachining instrument that was developed for conducting nanocutting, nanoscratching, and nanoindentation experiments. A piezoelectric tube scanner (PZT) is employed to generate three-dimensional machining motions. The sample is moved by the PZT, and the tool is kept stationary during machining. The machining forces are measured by force sensors with a resolution of sub-milliNewtons. The instrument is compact and can be used inside optical microscopes and scanning electron microscopes. In this paper, depth-sensing indentation experiments were performed to test the basic performance of the instrument. The indentation displacement was measured by a capacitance probe situated inside the PZT tube. An experimental system was constructed to locate and image indentations. The system consists of a high magnification microscope to measure coordinates of the indentation relative to a reference corner point on the sample, and an AFM equipped with an on-axis optical imaging system for locating the indentation. A technique was also employed to establish the tool-sample contact to nanometer accuracy. Indentation experiments were carried out on three kinds of materials with different hardness. Experimental results demonstrated the instrument has the ability of performing depth-sensing indentations. The frame compliance was also evaluated from the indentation results.     

便携式航空发动机试车仪的设计

发动机性能的好坏主要取决于发动机高、低压转子转速、滑油压力、燃油压力和排气温度等技术碜教.因此,设计了一种航空发动机试车仪.介绍了便携式航空发动机试车仪的功用和主要技术指标、结构和工作原理、检测电路设计及软件设计.     

机械振动检测仪器的研制

振动是工程机械重要的固有特性之一,是机械运行状态和故障检测的重要参数。针对低频旋转机械,研制了方便、快捷、智能化的机械振动检测仪。阐述了该检测仪器的测量方法、硬件电路实现方法以及软件设计的实现方法,其最大特点是以振动检测为主、温度检测为辅,两者相结合对机械设备进行监测,旨在为实时在线监测运行设备的故障诊断提供有力而可靠的数据支持。同时结合实际情况给出相应的结果,该仪器电路简单、成本低、性能优异。     

基于USB通讯的天文光学图像采集仪器

在分析天文图像采集设备对通信要求的基础上 ,提出应用USB通讯接口的数据通讯解决方案 ,介绍USB接口基本特性及优势 ,给出了USB总线接口在开发CCD相机系统应用中的软硬件设计实例     

一种高速冲击测试仪的研制

该文介绍了一种基于FPGA及多片A／D转换器的新式高速冲击测试仪，可实现时间一应力、时间一位移及位移一应力等曲线的记录，在解决冲击断裂性能方面具有较高的应用价值。     

多通道瓦斯参数监测仪的设计与应用

为了实现乏风瓦斯密度层分实验装置的在线监测和实时控制,本文提出了基于虚拟仪器架构的多通道瓦斯参数检测仪,在多串口采集卡的基础上实现多个瓦斯传感器的数据采集,并将直流电源和数字信号集成在同一路工作电缆中,从而便于实现采集点的设置和调整。另外通过上位机的数据处理软件实现了多通道瓦斯参数的波形记录、信号特征提取等工作。