Abstract:The performance index and its measuring method of the Iodine\|stabilized 633nm He\|Ne laser as the length primary standard(standard) are described briefly in this paper.Taking the comparison measurement results done by authors home and abroad as an example,the uncertainty of frequency or wave\|length of this kind of lasers is shown to be reproducibility.

Abstract:In this paper,an auto\|measuring system of aero\|camera lens focus,which uses linear CCD sensor as the detector,is introduced.The principle ,the hardware,the software and of the system are described,The results of data measured and the analysis of the relative error are given.

Abstract:The effect of the gas flow direction on the dynamic characteristic of a kind of the airborne total temperature sensor is discussed.Discovering that the deviation angle of the gas flow has an great effect on the dynmic characteristic of the sensor,the concept of directional sensitivity of the total temperature sensor is advanced for the first time.The reason of that is analyzed in this paper.And it is pointed out that,during the procasses of design,manufactrue and using,controlling the directional diviation is necessary,if not,the dynamic characteristic of the sensor will be aggravated.This conclusion can be adapted to other total temperature sensors with similar constructure.

Abstract:The method,combining the power source method with shunt method to verify the current transformer test set,is introduced and the uncertainty of the result are given.This method has been applied to verificate the newly developed 400Hz current transformer test set and it has a certain reference value for verifying the power frequency current transformer test set.

Abstract:In this paper,some problems about the real time measurement of quantity of the aircraft fuel are discussed,and among them the fuel density measurement is presented emphatically.The importance of density measurement,measuring method and researching situation at home and abroad are investigated.

Abstract:The design on checkout platform of starting ferformance for airborne starter\|generator and its realization are analyzed.The method of developing and manufacturing the three modules of the checkout platform,the technique of simulation control PID and the design of software are presented.

Abstract:How to apply the improved theodolite with telemeter to the test and measurement method of helicoptor suspension flight performance is presented.It has been proved by the practical flight test that this method is of precise theory and reasonable plan,it is simple to be improved and easy to be operated and its cost is cheap.Comparing with the original photographic measuring method,it has the advantage difficult to be substituted.

Abstract:In order to fit in with needs of the development of new technology and productivity,at the present time it is needed urgently to develop the intelligence standard pressure generator with high automatic degree and having the ability to generate the standard high pressure to raise the pressure measurement level.The developing project and the key technique of the intelligence standard pressure generator are presented in this paper.

Abstract:The present situation of the uncertainty of torque standard equipment at home and abroad is analyzed.The operating principle,uncertainty factor and uncertainty analysis method of the dead weight torque standard equipment are presented.The structure form and its effect degree on the accuracy of the torque standard equipment at home and abroad are compared and explained.

Abstract:Under the Agilent HP VEE developing environment and according to the driving program of the instrument,the realized test method of the stored program control function of the instrument is presented.This method can be widely used in the apparatus and instrument inspection department inside and outside the military.

Abstract:The period verification is one of the general requirements of verification and test laboratories.The verification of the reference standard is related to the effectiveness of the metrological work and test result of this area or unit.The verification standard,verification method,result processing,verification interval and record etc. of the highest metrology standard are presented in this paper.