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1.
非接触式在线动态扭矩测量装置的设计   总被引:1,自引:0,他引:1  
杨恩霞  田仁  纪鑫 《应用科技》2006,33(10):60-62
介绍了一种非接触式多工况在线动态扭矩测量装置。此装置利用装在转轴上2个截面的反射装置反射检测介质来传递转动轴上的信息,然后通过积分得到2个截面的相对转角,再通过控制系统进行扭矩的测量、结果的处理及数据的输出,可达到智能化的动态测量。  相似文献   

2.
火炮身管内表面综合测量系统研究   总被引:6,自引:1,他引:6  
研究一种用于火炮身管内表面的综合测量系统.该系统主要由环形激光发生器、反射锥镜、CCD相机以及驱动装置等组成,通过对环形激光器投射在被测火炮身管内壁上的环形光斑进行成像和分析计算,可对身管内表面的一个截面形廓进行检测;同时利用身管一段内表面在CCD相机上所成的像,可实现对膛线参数检测、内表面缺陷识别和磨损程度的检测.该系统可在驱动装置的驱动下沿着身管轴线移动,实现对整个身管内表面的综合测量。  相似文献   

3.
本文论述了面阵CCD传感器装置的测量原理、硬件设计、软件设计及系统标定,指出了影响测量精度的因素及解决措施。该装置的特点是能够实现对线材直径的非接触测量和对变形工件进行检测及动态测量,具有测量精度高、抗环境干扰等优点。  相似文献   

4.
建立了三等量块标准装置,并对该装置的误差及不确定度做了分析。检测结果证明该装置符合有关国家标准的要求,完全可以进行检定工作。  相似文献   

5.
在航空相机的研制过程中,对于相机各项性能指标的检验是很重要的环节。因此,一个能在地面上对相机性能进行检测的装置是必不可少的。本论文论述的就是有关于航空相机的性能检测系统的设计与实现,并且以此为背景独立对系统中相应的若干环节进行了设计、实现和调试;并对检测装置中的直线运动发生装置的运动控制系统进行了研究,利用平行光管产生平行光,以测试相机分辨率:  相似文献   

6.
积分球反射法测量铌的发射率随温度的变化   总被引:2,自引:0,他引:2  
提出了一种利用积分球反射法的脉冲加热技术测量材料热物性的方法,在此基础上研制了脉冲加热瞬态热物性测量装置,给出了利用该装置测量的铌在632.8nm波长下法向光谱发射率随温度的变化曲线,并进行了讨论。结果表明,所研制的装置能同时测量带状试样的比热、电阻率、全波长半球发射率及法向光谱发射率,具有试样制备简单、测试精度高等优点。  相似文献   

7.
文章介绍了一套基于PC104架构的数字式振动测试仪检测装置。利用该装置,可以对某型发动机振动测试仪各部件分别进行实时测量,并根据测量结果对测试仪进行整体评判,给出调整报告。  相似文献   

8.
卷绕系统的卷径检测和张力控制   总被引:2,自引:0,他引:2  
对一引进卷绕张力控制系统存在的问题进行了分析,提出了卷径检测及卷径扰动补偿的张力控制新方法,并介绍了按此方法研制的装置结构。试验证明,该装置对解决系统的故障起了重要作用。  相似文献   

9.
车用多普勒雷达测速系统若干参数的选择   总被引:1,自引:0,他引:1  
介绍了一种利用多普勒雷达检测车速、车距的系统方案。对系统主要参数的选择方法进行了论证。本系统可安装在汽车上,用于雾天或夜间监测前方车辆,并在车速、车距达到临界安全值时发出报警信号,以避免交通事故的发生,确保行车安全。  相似文献   

10.
对一引进卷绕张力控制系统存在的问题进行了分析,提出了卷径检测及卷径扰动补偿的张力控制新方法,并介绍了按此方法研制的装置结构.试验证明,该装置对解决系统的故障起了重要作用.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

13.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

14.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。  相似文献   

18.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

19.
20.
The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to  相似文献   

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