Research On A Double Probe Computer Aided Testing System For Internal Thread Of Joint

The main target of the research is to design and manufacture a CAT(Computer Aided Test) system of joint internal thread, in order to improve the measuring accuracy and quality of the joint internal thread of BAO STEEL Inc. This paper analyzes the success and limitation of the former design, and introduces a double probe system. On the basement, the paper deeply researches the following problems: digital signal process, arithmetic model, error analyzing and so on.Firstly, considering the single probe system's datum error, the paper puts forward a double probe system and modifies the datum error.Secondly, considering the problem of phase error of the single probe system, the paper introduces zero phase filter and designs zero phase filters after analyzes its principle.Thirdly, the paper builds parameter arithmetic model based on the middle line. We get the middle line from two interpolations, and give the compute course of the main parameters. In this way, we can avoid the phase error and thread side error what the single probe system cannot escape.Fourthly, this paper standardizes the linear of the inductance sensor and analyzes its error. Then we discuss the angle error of the laser sensor and the datum plane error of the mechanism. Finally, the paper gives some advice to improve the mechanism.Finally, we experiment the structure and math model with three groups data. The results prove that the system is successful.The research of the structure, parameter math model and error analyzing of the double probes system makes a good foundation for the actual use in the field. Su Lisheng(Manufacture and Automation)Directed by Yang Jianwu...