柴油机微粒金属丝网过滤体特性及反吹再生的初步研究

根据柴油机排气微粒净化的需要,开发出一种新型烧结金属丝网过滤体。对金属丝网过滤体的阻力特性和微粒捕集特性进行了试验研究;同时根据金属丝网过滤体的特点,设计了压缩空气脉冲反吹过滤体再生系统,并进行了初步的再生试验。研究结果表明,金属丝网过滤体具有良好的特性,完全能够满足柴油机排气微粒捕集的要求;金属丝网过滤体反吹再生是可行的。     

柴油机微粒金属丝网过滤体反吹再生系统性能的研究

通过对柴油机微粒金属丝网过滤体反吹再生系统的试验研究,分析了反吹再生系统的结构参数和运行参数对过滤体内的峰值压力、达到峰值压力的时间以及过滤体再生效果的影响,得出了一些有益的结论。研究结果对于全面了解柴油机微粒金属丝网过滤体的反吹再生系统性能以及金属丝网过滤体的结构设计和反吹再生系统的设计具有重要的意义。     

金属丝网二维分布尺寸激光在线检测仪系统

本文主要讨论金属丝网二维分布尺寸激光在线检测仪系统,给出了较为详细的理论推导、测量公式及测量结果。该检测仪系统利用了“激光-傅里叶变换法”,应用CCD 光电元件和图象处理系统对被采样信号进行实时采集和处理,实现了金属丝网二维分布尺寸的在线检测。该系统具有测量速度快,检测精度高,劳动强度低和数据处理自动化等特点。     

金属丝网减振器在发动机隔振系统中的应用

AAW-400型金属丝网减振器是目前较为新型的隔振器,其中的金属网垫阻尼元件因为具有许多显著的优点而在隔振系统中得到了越来越广泛的应用.简要的说明了发动机工作时所引发的振动对车体及乘员的危害,分析了AAW-400金属丝网减振器的特点及其在发动机隔振系统中的应用.     

Pro/M在振动筛动态特性分析中的应用

用Pro/MECHANICA软件对某振动筛筛箱的动态特性作分析研究，获得了筛箱低阶固有频率与模态模型，并找出了筛箱在额定载荷作用下各部位的应力和变形的分布规律。分析表明，该振动箱的结构设计合理，且在设计工况下，筛箱侧板的最大主应力为14．2MPa，其动强度是满足要求的。为该筛的改进设计及后续筛箱动态强度的试验研究提供了必要的依据。     

乘用车侧门安全性试验台图像系统和控制系统的研制

为了充分采集实车撞击的试验数据，研制了乘用车侧门安全性试验台图像系统和控制系统。图像系统采用三维法跟踪车身上数十个特征点的变形轨迹，控制系统以光为媒介，将加载系统和图像系统联系在一起，实现了加载和图像采集的同步控制。     

一种新型筛分机的开发与设计

介绍一种新型筛分机的结构、原理及特点.该筛分机采用两套激振系统分别以不同频率对筛面进行激振，高频激振用来加大筛面的振动强度及自清洗能力，提高筛面的筛透能力，低频激振用来提高物料在筛面上的输送速度。     

金属丝网块成型工艺研究

系统地研究了金属丝网块的制备工艺和圆柱状金属丝网减振元件的形状因子与弹性模量和相对密度之间的关系,为金属丝网块的系列化生产和应用提出了一种有效的性能分析方法.     

广义随机制造系统的运行与控制机制

广义随机制造是一种面向不同自动化程度车间的新的制造系统模式。本文介绍了广义随机制造系统的基本概念，分析了系统的结构，讨论了协调分布式控制、奖惩机制及自主式工艺设计的实现策略。提出了基于动态网筛的漏斗模型ＤＳＢＦ。     

广义随机制造系统的运行与控制机制

广义随机制行是一种面向不同自动化程度车同间的新的制造系统模式。本文介绍了广义随机制造系统的基本概念，分析了系统的结构，讨论了协调分布式控制，奖惩机制及自主式工艺设计的实践策略，提出了基于动态网筛的漏斗模型ＤＳＢＦ。     

Blind sensing [eddy current sensor]

Describes a precise and accurate noncontact measuring device based on eddy currents. It is based on the principle that when an oscillator induces an eddy current in an electrically conductive target, the circuit loses energy. It works at high speeds, is nonoptical and is impervious to variations in temperature and other ambient conditions (oil, dirt, water, electromagnetic fields etc.). Electrical runout (inhomogeneity) disturbs the propagation of the eddy currents and affects the transducer output, which in turn results in noise and degraded resolution, but this effect can be reduced by an appropriate design. The sensors are used for various measurements, including distance, thickness, deflection, position, eccentricity, shaft run-out, imbalance, lubrication gap, vibration, deformation, valve stroke, compression gap, wear, shaft oscillation, shaft elongation and centring. The sensor has frequency output distance measurement; thickness measurement; deflection measurement; position measurement; eccentricity measurement; shaft run-out measurement; imbalance measurement; lubrication gap measurement; vibration measurement; deformation measurement; valve stroke measurement; compression gap measurement; wear measurement; shaft oscillation measurement; shaft elongation measurement; centring measurement;     

单目视觉测量系统不确定度的分析

基于光学测头特征点成像的单目视觉坐标测量系统是一种新兴的高精度、大尺寸、三维整体、在线测试系统,在现代工业生产中具有重要应用价值。为评价这种单目视觉测量系统的测量精度,对基于测量不确定度的评定方法进行研究。在对影响单目视觉坐标测量系统测量精度的主要因素进行深入分析研究的基础上,建立测量不确定度评定表达式,实现对测量系统测量精度的评定;通过测量试验对评定方法加以验证,试验证明测量系统的测量精度与分析结果相吻合。     

Intelligent measurement — A view of the state of the art and current trends

The paper examines briefly the state of the art of intelligent measurement on the basis of the proceedings of the IMEKO 1986 Symposium on the subject. It identifies advances in computer-assisted measurement, data conditioning, measurement process control, measurement result output, and measurement data processing as well as application of machine intelligence to measurement interpretation and use in decision support. It identifies the latter as a significant area of future progress. Applications of intelligent measurement in laboratory automation, electrical measurement, mechanical manufacture and associated inspection and clinical medicine are highlighted.     

Flow measurement system model with distributed resources

The paper describes a general flow measurement system model with distributed resources based on Distributed Component Object Model (DCOM). Complex flow-rate calculation procedures are decomposed and distributed throughout the measurement system. The paper explains to what extent a flow measurement process can be partitioned into the services that can be realized as separate objects shareable across the network. Certain measurement system components perform local measurements and/or calculations and communicate with a remote measurement system resource via intranet/internet. The measurement system comprises direct measurements of the primary measurement quantities, the calculation of the flow-rate and the calculation of the physical properties for various gases, gas mixtures, water and steam. Using DCOM the measurement system automatically activates the remote client/server components that carry out flow-rate calculations in real time. The measurement system covers different measurement procedures and a variety of primary elements. The performances of the measurement system model have been verified by realizing a measurement system with two measuring sections.     

基于光纤位移传感器的轴承最小油膜厚度的测量方法

基于光纤传感器的优点和间接测量油膜厚度方法的实用性,从理论上探讨了用光纤位移传感器间接测量圆轴承润滑油膜最小厚度的两种方法:两点测量法和三点测量法。通过对测量方案设计以及误差理论分析,结果表明:两点测量方法的理论测试精度较高,其最小厚度的绝对误差和位置角的绝对误差都较小,适合测试精度要求不高的场合;三点测量方法的理论测试精度比两点测量方法高,其相应各参数的测量误差为零。     

基于三坐标测量和在线测量的白车身尺寸控制

通过对三坐标测量设备和在线测量设备的特点介绍以及白车身尺寸控制的需求分析,并结合近年来在车身现场的研究及应用,从测量系统报警、测点设置、三坐标测量频次优化、数据分析过程和尺寸系统评价等方面探讨如何用三坐标测量系统和在线测量系统进行白车身尺寸的控制.     

阻尼材料动态性能参数的宽频带测试研究

针对阻尼材料动态性能参数测试难题,本文在深入分析材料测试理论的基础上,结合小试件阻尼测试研究成果,设计了一套高性价比材料参数测试系统。实验结果表明该系统测量频带宽、精度高且具有良好的可重复性。     

Multiple Measurement Models of Articulated Arm Coordinate Measuring Machines

The existing articulated arm coordinate measuring machines(AACMM) with one measurement model are easy to cause low measurement accuracy because the whole sampling space is much bigger than the result in the unstable calibration parameters. To compensate for the deficiency of one measurement model, the multiple measurement models are built by the Denavit-Hartenberg's notation, the homemade standard rod components are used as a calibration tool and the Levenberg-Marquardt calibration algorithm is applied to solve the structural parameters in the measurement models. During the tests of multiple measurement models, the sample areas are selected in two situations. It is found that the measurement errors' sigma value(0.083 4 mm) dealt with one measurement model is nearly two times larger than that of the multiple measurement models(0.043 1 mm) in the same sample area. While in the different sample area, the measurement errors' sigma value(0.054 0 mm) dealt with the multiple measurement models is about 40% of one measurement model(0.137 3 mm). The preliminary results suggest that the measurement accuracy of AACMM dealt with multiple measurement models is superior to the accuracy of the existing machine with one measurement model. This paper proposes the multiple measurement models to improve the measurement accuracy of AACMM without increasing any hardware cost.     

激光跟踪仪测角误差的现场评价

激光跟踪仪是基于角度传感和测长技术相结合的球坐标测量系统,其长度测量采用激光干涉测长方法,可直接溯源至激光波长,因此,激光跟踪仪的长度测量精度远高于角度测量精度,相对而言,测角误差就成为评价跟踪仪测量精度的重要指标。为了对现场测量激光跟踪仪的测角误差进行快速有效地评价,采用跟踪仪多站位对空间中测量区域内若干个被测点进行测量,与传统基于角度交汇原理的多站位冗余测量不同,利用各站位所观测的高精度测长值建立误差方程,并通过测长方向的矢量位移对跟踪仪测长误差进行约束,获得被测点三维坐标在跟踪仪水平角和垂直角方向上的改正值,以此来评价激光跟踪仪的测角误差。通过Leica激光跟踪仪AT901-LR进行了多站位测角误差评价实验,在现场测量条件下,跟踪仪水平和垂直方向测角误差约为0.003 mm/m(1σ),符合跟踪仪的测量误差特性。     

微机电系统（MEMS）促进测量学发展

本文从纳米、超微角位移测量、及力学、声学、医学测量诸方面说明MEMS促进测量学的发展。通过所举范例,可以看出MEMS在各方面促进测量学发展及其深远的科学意义。其中超微角位移测量的构想以往资料未见,是创新。