Abstract:The technical index and calibration level of the DC resistance voltage divider are analyzed,the uniform calibration method is proposed,the uncertainty is analyzed and the checking method is given.The ratio error of the divider calibration with this method is at 10\ \{-7\} order magnitude.

Abstract:Compared with the peripheral A/D conversion device with one built inside the Single\|chip,computer is much more simple and convenient for use.And it is easy to get high signal to noise ratio.But the resolution is always not high enough to satisfy the requirement for precision measurement.A practical effective method for enhancing the resolution of A/D conversion device built inside the single\|chip computer is proposed in this paper,which can increase the orignal resolution by 1~3 times only with simple peripheral circuit and internal software calculation.

Abstract:通过自行设计制造色分离器、一维发射系统、提升反射镜组针丹麦ＤＡＮＴＥＣ的二维ＬＤＶ改造为三维ＬＤＶ。提出了镀膜分光和紫光滤光片提纯相结合的最佳分色方案并研制了镀膜分色片、紫光波光片这两种关键部件。通过联调作校准试验，证明本三维ＬＤＶ系统完全达到了设计技术指标。

Abstract:The second class liquid pressure manometer is used as the standard unit.The method of calibrating the aneriod pressure manometer and the method of data processing are introduced.

Abstract:This paper introduces the principle of the temperature concussion test.A method of measuring the parameters of the temperature concussion test installation is provided in this paper and a instance is analysed.

Abstract:In this paper,the evaluation of the delay time difference between channels for a four parameters sine wave by least square is introduced,uncertainty analysis and evaluation process are given and an example of analysis and evaluation is given at the same time.This process and result can be applied to the uncertainty analysis of relative index with regard to the measurement standard and to the evaluation of the uncertainty of the index itself as well.

Abstract:In this paper the situation of mass comparison between the mass calibration lab of CIMM and the international lab in Asican Pacific Area,the analysis method of uncertainty are introduced.

Abstract:A kind of auto\|measuring system of accelerometer with higher automated degree is introduced briefly.The methods of measurement and control of the main parts of the system are described emphatically.And the data acquisition and processing are analyzed.

Abstract:Taking verification information management system of hardness specimen as an example,a method of realizing concept design and realization design of data\|base by E\|R method (entity\|relationship approach) is introduced.

Abstract:The application process of computer communication system network in metrology management and its practical significance are introduced.

Abstract:The optical method of measuring surface roughness has advantages of uncontact,high accuracy and fast response,so the research of that method fixes people's eyes and its development gets very fast.In this paper,several principles and methods of typical optical measurement and some commercialized instruments are presented briefly.