Abstract:A new kind of double-tube construction of coriolis type mass now meter with straight sensor tube is presented in this paper. It avoids the defect of additional error caused by the difference character of two tubes in the construction of double measuring tubes and the defect of error caused by the vibration of the base in the construction of single measuring tube. The principle of the new construction and the realisation method is discussed in this paper in detail, moreover, the new doubletube construction is realized, and very good performance is achieved-

Abstract:This paper introduced a realisable method of multiwavelength pyrorneter. The unknown and variety of surface emissivity of an object is the main cause which affects the accuracy of the radiation pyrometer indication. The multiwavelenth pyrometer is one of the effective methods to decrease the effect of the emissivity and acquire the true temperature of the object surface. On the basis of synthesizing many references, the author discussed the theory of multi - wavelength pyrometer in detail, analyzed some algorithms of data processing, and designed and reallsed the fourcolour pyrometer.

Abstract:Different from the common 4-point method for separating the form error motion of the workpiece from the motion error of the axis of rotation. It can reach higher rneasured precision by making use 4 - point method. This paper describes the measurement principle and characteristics of mechanical structure, optics-electric system, micro-sensor signal sample, and computer interface.

Abstract:This paper gives the correct measuring results of Ry value and benefits the reasonable estimation for surface quality.