Abstract:The flow velocity measurement technology is an important means during researching the flow characteristic in the flow field.To understand the principle and application characteristic of the current flow velocity measurement instrument is very important for selecting suitable instrument to be used.This paper introduces the principle and application characteristic of the internal and external current flow velocity measurement technologies and the comparision of the measured parameters for various measurement ...

Abstract:Two innovation based fault detection methods in the integrated navigation system are presented,one the chi-square test method and one the largest eigenvalue of the sample covariance matrices test meathod.The application of the two methods in the integrated navigation system is simulated and compared.Results show that the new method is more sensitivity to the fault,the integrated system have high accuracy.The relative merits in implementing the fault detect algorithm in the integrated navigation system is di...

Abstract:In this paper,the key technology during building the turbine blades physical modeling is analyzed,the articular arm laser scanner is used for the reverse scan of the surface of the turbine blades,and the 3D error statistics and the section contrast of the turbine blades are realized by the Geomagic Qualify software.This research provides a reference for the digital design and check of the turbine blades.

Abstract:According to the operating principle,the control demand and working process of the pressure-controller pneumatic circuit control system,the mathematic model is deduced in this paper,then the transfer function and structure diagram of the gas-pressure control system are given,the theoretical basis for future development is provided.

Abstract:In this paper,we introduce the design of a special calibration equipment for the taper and taper threads.Combining the results of error analysis with the finite element method(FEM) analysis of the main deformed components,the upright column and the bracket for the core clamper,are optimized to meet system's rigidity.The error of the whole system is analyzed and calculated so that the design will meet the requirements.

Abstract:介绍了温湿度计量装置的研制,阐述了其工作原理、硬件组成、关键技术及实现的功能.该装置的研制成功不仅能够满足小型湿度传感器和温度传感器的校准需要,也可以用于露点湿度计(露点范围:-20～40℃)的校准.

Abstract:In this paper,we mostly analyze the effect of clamp mass on standard dynamometers during the testing machines are measured and verified for mechanical properties,and then give the methods about how to avoid or decrease this effect through analyzing reasons.

Abstract:In this paper,the theory and the method of large-attenuation's test are introduced.Then,the automatic calibration method based on Visual Basic 6.0 is emphasized.By this automatic calibration we can complete the large-attenuation's test easily.And the automatic calibration system in this paper is simple and convenient.Its performance is very good.

Abstract:Pointing to the property of photoconductive multiunit infrared detector,an automatic testing system for uniformity of infrared detector is developed.This paper gives an introduction to the components of testing system and its software,and discusses the working principle,control strategy and data processing technique.The test results not only show that the system is reasonable and stable,but also show it has accurate control and antijamming capability.

Abstract:The basic principle of the antenna testing platform,design of its mechanism,measuring and control system are briefly introduced in the paper,together with its material choice,error alalysis and in-situ assembly.

Abstract:The influencing factors of uncertainty of measurement for determination of equivalent water content in nitrogen tetroxide by NMR method we established were discussed in this paper.Also every uncertainty component was evaluated and the combined uncertainty was put forward.

Abstract:The methods of mixed programming of Matlab and VB are introduced in this paper.As an example,The design method and approach in engineering application of indentation diameter measurement based on the COM technology are introduced in detail.The method based on the COM technology can greatly increase the efficiency of the development process,reduce programming difficulty and enhance the maintainability of the programmes.And this method can have many advantages which a single programming language does not.

Abstract:The key techniques of using GL Studio simulate instruments is analyzed in this paper.Combining with VC++6.0,the simulation of a helicopter instrument panel is realized.According to the development process of GL Studio software,the modeling and simulation process of the instrument panel,the methods of setting properties for instruments and the coding process are introduced in detail.The simulation results are shown in this paper.Experiments prove that the GL Studio can create the realistic models.It is a sho...

Abstract:Inputting instrument information is a fussy process in receiving and distribution management of equipment in metrology technical organization.For receiving and distribution of a few dozen or even hundreds of equipment every time,the traditional manual work is inefficiency and time-consuming.That becomes the bottleneck of restricting efficiency of receiving and distribution of equipment.Via analyzing of the database technique,network technique and bar code technique,we bring forward a scheme based on softwar...