Abstract:

Abstract:This paper describes the measurement of amplitude and phase of mechanical vibration with laser interferometer and then the characteristic measurement of magnitude and phase frequence response functions (FRF) for the sensitivity of vibration transducer. The characteristic of FRF is emphasised,especially the calculation method of untangential function

Abstract:The principle of an intelligent ultrasonic measuring system for mass level with remote control is presented. This system has feartures of high accuracy of measurement, high speed (fast response) and small repeatability error, and has the function of data access memory.

Abstract:AnalysisandStudyofSpatialCoordinateTransformationTechnique（2）ZhouWelhu;LanYibing;DingShudan;FelYetai（上接1999年第19卷第4期第12页）7微分转动前已叙述，坐标系间的转换一般需多次旋转，旋转次序是任意的。但应记住，绕坐标不同的旋转次序，虽然旋转角都是三个，但各自旋转角之间的差别却可能较大。也就是说，旋转矩阵运算时不能交换位置。只有当ax，ay，a二均很小时，坐标旋转才与旋转次序无关，与左、右乘也无关。此时称转角a特别小时的转动为微分转动。微分转动不仅可以简化坐标转换，而且理论上可以解决绕空间任意轴的…

Abstract:This setting up of the time constant measuring equipment and the solution of critical technique are presented. The verification of the uncertainty has been done.

Abstract:The variation rule of Tritium in Lithium deuteride coincides with the naturial Tritium decay incompletely. For determing its rule, the follow-up measurement of the guantity of Tritium in storing Lithium deuteride-tritide has been done for a long time. Using measurement data and polynomial regression and conbining with Tritium natural decay rule,this paper establishes a variation mathematic model of Tritium in Lithium deuteride-tritide. The model has very small forcasting errors at the measuring points.

Abstract:Two new evaluation methods and processes about the DC gain and linearity of data acquisition system are presented in this paper. They are "precise evaluation on quantization steps" and " precise evaluation on determining deviation between input-values". At the same time the advantages,defects and application of these methods are introduced and discussed.

Abstract:Taking an on-line dynamic measurement system as an example,the influence of the distributive position of the filtering network on the error of dynamic measurement is analyzed. The following design criterion is proposed:in differential dynamic measurement system the filtering network must be located behind the add or minus operation circuit.

Abstract:The acquisition and processing system using for verification of surface temperature sensor is presented in this paper. This system has features of being easy to be operated,being convenient to be used and being reliable to be operated.

Abstract:This paper presentes a new type of portable airplane weighing system,especially its performance,principle and application.

Abstract:A temperature control system for coal-sample analysis is introduced in this paper. The hardware is mainly composed of thermocoouple special amplifier, 8031 chip microprocessor and its digital power regulating circuit. The software takes intelligence production control algorithm. The practical application shows that all the indexes of the system fully meet the needs of GB212-77.

Abstract:Study international standard ISO-10012, strengthen metrology management, ensure the quality of product and enhance the social economical benefit.

Abstract:The mechanical metrology investigation situation about going to NlST of the USA andCanada and so on presented. Some experiences are superficially discussed.