接觸式石油管螺紋測量儀控制系統(tǒng)的設計與研究
[Abstract]:Petroleum pipe is the main carrier in the process of oil and natural gas exploitation and transportation. The thread measurement of oil pipe is one of the main methods to detect the safety and reliability of oil pipe. At present, the commonly used oil pipe thread detection instruments include general stop gauge, length measuring instrument, coordinate measuring instrument and image measuring instrument, etc. However, most of these instruments have low measuring precision, single measuring parameters and low measuring efficiency in practical use. Vulnerable to environmental impact and other issues. Therefore, a control system of contact oil pipe thread measuring instrument is developed by using modern microprocessors and high precision trigger probe, which can realize the automatic scanning of oil pipe thread profile and the comprehensive measurement of pitch, tooth shape angle and taper parameter. The main research contents are as follows: (1) the requirements of API SPEC 5B and GB/T 9253.2-1999 are analyzed, the performance parameters of the control system are put forward, and the mechanical structure of the measuring instrument is designed. The overall structure of the measuring instrument control system is planned. (2) the IMC3042 motion control card is used as the control core of the system, and the system motion control, data acquisition and auxiliary measurement functions are realized. According to the control performance requirements of the system, the hardware of the transmission system, the measuring feedback device (grating ruler) and the type of the probe are selected. The connection circuit between the hardware and the motion control card is designed. (3) the software programming of the control system is completed in the Labview programming environment. The software system includes man-machine interface, system initialization, motion control, data acquisition. Data processing and auxiliary function modules. (4) using the multi-axis control function of the IMC motion control card and the switch probe signal, the motion path of the probe is planned. The intelligent acceleration and deceleration programming algorithm and the programming of step closed loop system control are completed. (5) the process of data processing and parameter calculation is discussed. The validity of the data obtained by scanning is judged by FFT spectrum analysis method, and then uniform density is obtained by robust Gao Si regression filtering and data interpolation method. Finally, the thread parameters are obtained according to the curve fitting method. (6) error analysis and compensation of the measuring instrument are carried out, and the comparative measurement experiments on different specifications and types of oil pipe threads are carried out on the prototype and Sanfeng coordinate measuring machine developed by our research group. The experimental results show that the measurement results meet the requirements of accuracy.
【學位授予單位】:陜西理工大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TE973.6;TP273
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