Abstract:Combining the development of the test system for the testing platform of some modelhigh thrust-weight ratio turbofan engine, the technique index, data acquisition technique, displaytechnique and simulation principle of test run of the test system are described. In order to increase theprecision of measurement and enhance the use performance of this system, the method of nonlinearcorrection of parameter measured, multiple mode display, real-tirne engine parameter calculation andanlysis etc. are suggested and applied.

Abstract:提出一种新的高精度大型平面扫描仪。利用双光束补偿系统，扫描头由一特殊光路组成。当入射光通过此光路后，产生对称输出的两束光。当入射光发生角漂或扫描头发生摆动时，输出的两束光对称上下漂移，其中心线保持不变，故扫描形成的基准面保持不变，从而大大提高了测量精度。经实验证明，测量精度优于2．5×10－6。

Abstract:The character and mathematical model of the flight altitude are described. Several practicalmethods of analogically producing these signals in the simutative system are given primarily.

Abstract:This paper presents the automatic test system consisting of PC industry computer andintelligent measuring instrument. Using the method of time-measuring in fixed angle, high accuracyoptical prizm and laser angle-measuring technique,the test of high accuracy,low-rate sudden-stop turntable has been realized. The paper describes the construction of the system,verification principle of theturn rate,software design and method of data processing. Finally,the result of the practical applicationis shown.

Abstract:The method of measuring small diameter based on laser diffraction priciple is introducedin this paper. Using linear CCD device to receive image of laser diffraction, the data acquisition,processing and calcu1ation are completed by 8O98 single chip microcomputer; fulfilling the measurementof diameter of thread or wire with smill diameter on line.

Abstract:In order to enhance the measuring ability of the digital multimeter for measuring highervoltage signal, one stage of auto-acquisition and comparison circuit has been put in. Thereby themeasurement of the peak value of the high frequency voltage signal has realized.

Abstract:According to the result of trial flights of Cw - 1002 and - 5 airoplans, theperformances of these two products are compared and analyzed- The new opinion of obtaining rnethod ofthe air temperature during flight is proposed. Using the general formula of time constant provided inthis paper,the delay correction may be done for the air recovery temperature measured,the coefficient ofrestitution at any condition may be evaluated by interpolation method and the air instantaneoustemperature may be evaluated at last. It is suggested that the coefficient of restitution of air temperaturetranducer is calibrated by Reynalds analogue criterion.

Abstract:Combining the image measurement method with the least-square circle method and usingthe multimedia image processing technique for designing a computer auto-measuring system, thenoncontact and remote rapid measurement is realized and the precision of measurement is increased.Thereby a set of practical measuring methods is provided for measuring some special workpieces.

Abstract:A new equipment using rotating cylinder to avoid measuring moment for measuringliquid viscosity is presented and its principle is described. How to use microcomputer to measureviscosity of non-Newton fluid is instroduced