磁梯度张量在磁体测距中的应用研究  

Researching of applying magnetic gradient tensor in range finding magnetic substance

作　　者：肖雄[1] 杨晓非[1] 欧阳君[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《电子测量技术》2013年第4期15-19,共5页Electronic Measurement Technology

摘　　要：磁测距技术具有全方向定位、对环境依赖低等优点,拥有广阔的应用空间。传统的磁测距技术以磁场总量测量为主,但计算量大,定位实时性差。针对这一不足,在磁偶极子模型的基础上建立了磁梯度张量测距模型。通过欧拉反褶积法理论推导出磁梯度张量定位的距离公式,根据该公式确立了5传感器测距模型,并以霍尼韦尔5883L微型磁阻传感器为核心设计、制作了磁梯度张量测距仪。经过实验验证,该测距仪具有短程测距的功能,可以有效测量1m内目标磁体距离。该结果表明,利用磁梯度张量测量距离的方法是行之有效的,且具有较高的精度。Magnetic ranging technique with the excellent feature of full-directional positioning and low dependence on the environment has a broad application space. The traditional magnetic ranging techniques mainly measured the total magnetic field, but it computes very complex and has bad real-time quality. For this deficiency, on the basis of magnetic dipole model the ranging model of magnetic gradient tensor is built. The range formula to calculate the location from magnetic gradient tensor is derived in Euler deconvolution method theoretically. According to this formula the location model of 5 sensors is established. On this basis, the magnetic gradient tensor rangefinder,of which the main part is Honeywell 5883L mini magnetoresistive sensor, is designed and made. Through experiment, this rangefinder can tell distance of magnetic target within lm, which shows that magnetic gradient tensor used in distance measurement is effective and has a high accuracy.

关 键 词：磁偶极子 磁梯度张量 欧拉反褶积 测距仪 

分 类 号：TH762[机械工程—仪器科学与技术]