清管器跟踪定位技术发展现状与趋势

Present and future development of pig tracing and positioning techniques

阐述了清管器跟踪定位技术的发展现状,分析了放射性同位素法、机械法、声学法、压力法和磁学法5种传统技术的优缺点,指出电磁脉冲法和压力法是其中最佳、最稳定和最成熟的两种方法,并提出基于这两种方法的远程跟踪定位技术的实现方法和方案,用智能判断替代人工判断,但是,该方法并未实现实时在线跟踪。由此,提出一种基于光纤震动原理的在线跟踪定位法,其可以对清管器位置进行全过程监控,实现实时在线跟踪,且不依赖除光纤以外的任何条件,是未来清管器跟踪定位技术的重要发展方向。

This paper reviews present development of pig tracing and positioning techniques. Advantages and disadvantages of five conventional tracing and positioning techniques, including radioisotope, mechanical, acoustic, pressure and magnetic method, are analyzed. Among these methods, electric-magnetic pulse and pressure methods are considered as the best methods with highest stability and maturity. This paper proposes the development of remote tracing and positioning techniques based on these two methods to replace artificial judgment by intellectual judgment. Unfortunately, the techniques may not be used to perform on-line tracing in real time. Accordingly, the on-line tracing and positioning technique based on principles of optical fiber vibration is proposed to achieve on-line tracing in real time through whole-process monitoring on location of the pig. With no dependence on any external conditions except the optical fiber, the technique represents a key development trend of pig tracing and positioning techniques in the future. （2 Figures, 12 References）