一种金属锚杆长度无损测量方法  

A non-destructive measurement method of metal anchor pole length

作　　者：张法全[1] 周强[1] 王国富[1] 叶金才[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《工矿自动化》2016年第5期24-27,共4页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(613620620);广西自然科学基金资助项目(2013GXNSFAA019327;2013GXNSFFA019004);桂林电子科技大学研究生教育创新计划资助项目(GDYCSZ201461)

摘　　要：针对现有锚杆长度测量方法存在信号耦合复杂和测量长度受限问题,提出了一种基于半波偶极子天线的金属锚杆长度无损测量方法。将一根金属参考线作为半波偶极子天线的一臂,与单根金属锚杆一起等效为半波偶极子天线;采用HFSS软件分析了非对称半波偶极子天线对谐振频率的影响,提出通过频率扫描方式来寻找天线谐振频率;根据半波偶极子天线谐振时天线长度与信号波长的关系,由天线谐振频率和金属参考线长度求得锚杆长度。实际测试结果表明,该方法测量长度大于10m,测量误差小于5%。For problems of complex signal coupling and limited measuring length existed in non- destructive measurement methods at present, a non-destructive measurement method of metal anchor pole length was proposed based on half wave dipole antenna theory. A half wave dipole antenna is equaled by a metal reference wire as an arm and a single metal anchor pole as the other one. Influence of asymmetric half wave dipole antenna on the antenna resonant frequency is analyzed by HFSS software analyzes, and frequency scanning method is used to find the antenna resonant frequency. The metal anchor pole length is calculated by use of the antenna resonant frequency and the metal reference wire length according to relationship between antenna length and signal wavelength when the half wave dipole antenna resonances. The test results show that measurement length of the method is more than 10 m and measurement error is less than 5%.

关 键 词：金属锚杆 无损测量 半波偶极子天线 

分 类 号：TD353[矿业工程—矿井建设]