Abstract:It is instructive to measure and monitor the temperature field of the hot end surface of the aero-engine for prolonging its life.The article describes several temperature measurement methods,such as thermocouple,pyrometer,infrared thermal imager and temperature indicating paints,etc.The two temperature measurement techniques,multi-wavelength pyrometer and vision pyrometer are discussed in detail,by which the influence of emissivity of measured surface on the temperature measurement can be reduced greatly.Th...

Abstract:The navigation system,which is one of the most important parts of the airplane,can keep the airplane flying safely.But,some parameters of the system,such as the VOR bear,TACAN bear,landing distance and slip line etc,are special parameters which are difficult to calibrate accurately by the common ways.In addition,it is also difficult to be traced to the national standard directly for lack of the highest national standard.Now,we take the Range NAV system for an example to research the characteristics of the c...

Abstract:The periodic verification is an important means which can ensure the measuring instruments to carry out the accurate and reliable measurement.The verification period of the measuring instruments has a significant impact on reliability of measuring instrument and economy of verification.This paper develops the reliability method which establishes verification period of electronic measuring equipment based on reliability model through the relationship between measurement reliability and service time.This meth...

Abstract:In this paper,based on the binocular stereo vision sensor 3D measurement model and the principle of coordinate transformation of space and adopting the least square redundant algorithm,the basic principle of the measuremant of the space 3D point coordinate by the two-camera is discussed.The non-linear measurement equation of the visual measuring system is establishea.Through experiment,the feasibility of the Two-light pen-camera visual 3D coordinate measuring system is proved.

Abstract:In this paper,various factors that will affect the final accuracy of the machining is analized and the Taguchi method is to reasomably determine the optimal calibration period of the the CNC machine tool.Thus the quality control in machining process of the CNC machine tool processing can be assured.

Abstract:A mathematical model of a pistonphone is deduced by theoretical analysis.Furthermore,it is proved that the pressure in the pistonphone chamber accords with the model very well by the comparison between experiment result and computation.

Abstract:This paper introduces the design idea and implementation method of a kind of high-voltage pulse source.It solves the problem that there is no standard source for calibrating some special testing equipment.At the same time,It provides a reference for solving these similar problems.

Abstract:This paper introduce the aviation test equipment for X-type radar,describes and analyzes the installation scheme.

Abstract:Taking the two-shielded blowing thermocouple as the basic structure,combining the calculation with the experiment and in order to solve how to calibrate the gas flow temperature sensor behind the turbine,a kind of K type reference temperature sensor adapted for the in-situ aero-engine test bed is designed and used to calibrate the in-situ measuring temperature sensor.Thus a reference for the design of this kind of rieference temperature sensor is provided.

Abstract:This paper introduces the calibration method by loading to the engine axis.Comparing with the plane loading method,the relevant conclusion is obtained.

Abstract:In recent years,some paper discussed the difference and the importance of verification and calibration,verification regulations and calibration specifications.this article,in terms of working experience discusses the re-realization instrument verification and calibration,verification regulations and calibration specifications.

Abstract:In this paper,the conception of electrical length is firstly introduced.Then it recommends three methods of electrical length measurement which is performed by network analyzer.One method is electrical delay in frequency domain.The other is reflection measurement in time domain.And the third is transmission measurement in time domain.Some experimentation for these methods has been done.

Abstract:In this paper,the new measuring method of taper-face position ring is introduced.This method has solved the key problem in the measurement using optoelectronic technology.This paper has expatiated on the measuring principle,the operating principle of experiment system and the evaluation of uncertainty of measurement.

Abstract:Through Internet or LAN to make the instrument with GPIB interface be a long distance distributive measuring system is one of the application and development hotspots in nowadays measurement and control field.Pointing to this problem,based on the basic concept of the DataSochet technology and taking the Fluke 8840A digital voltmeter as an example,in this paper the control method of GPIB interface instrument is introduced,through the LAN under the LabVIEW programming development environment and using the Dat...

Abstract:Special test equipment has a wider application of the weapons and equipment quality control,performance evaluation,technical indicators to verify.The accuracy of test data directly affects the quality of equipment.Management and calibration for special test equipment is facing a major challenge in metrology laboratory of the defense industry.Via analyzing of characteristics and the status of special test equipment,in particular the paper discusses the problems that we need to pay attention and how to carry ...