TMR磁传感器的水下弹丸坐标测试技术研究  

The realization of space coordinate test device for underwater flying object based on TMR magnetic sensor

作　　者：吴梦秋 顾金良[1] 李建 丁明康 罗红娥[1] 夏言[1] Wu Mengqiu;Gu Jinliang;Li Jian;Ding Mingkang;Luo Hong′e;Xia Yan(National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China;Nei Menggu North Heavy Industry Group Co.,Ltd.,Nanjing Branch,Nanjing 210001,China)

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]内蒙古北方重工业集团有限公司南京分公司,南京210001

出　　处：《电子测量技术》2020年第24期125-128,共4页Electronic Measurement Technology

摘　　要：针对声学、视觉等水下定位方法对水体环境要求较高、隐蔽性差的问题,提出基于磁传感器的水下飞行物空间坐标测试装置。该装置采用多个隧道磁敏电阻(TMR)传感器组成区截靶,通过标定可以建立测试点磁场强度与该点和磁化飞行物距离的映射关系。通过该映射关系,可以把TMR传感器测得的磁场强度转化为各个传感器与磁化飞行物的距离。最后通过基于最小二乘的接收信号强度(RSS)法估算出飞行物通过区截靶时的空间坐标。仿真和实验结果表明该装置测距精度可达0.2 cm,定位精度可达0.3 cm,可以实现对水下飞行物的定位。Aiming at the problems that underwater positioning methods such as acoustics and vision have high requirements for water environment and poor concealment, a magnetic sensor-based space coordinate test device for underwater flying objects is proposed. The device uses multiple tunnel magnetoresistance(TMR) sensors to form a region to intercept the target. Through calibration, the mapping relationship between the magnetic field strength of the test point and the distance between the point and the magnetized flying object can be established. Through this mapping relationship, the magnetic field intensity measured by the TMR sensors can be converted into the distance between each sensor and the magnetized flying object. Finally, the received signal strength(RSS) method based on least squares is used to estimate the space coordinates of the flying object when it passes through the area to intercept the target. Simulation and experimental results show that the device has a ranging accuracy of 0.2 cm and a positioning accuracy of 0.3 cm, which can realize the positioning of underwater flying objects.

关 键 词：TMR磁传感器 水下飞行物 空间坐标 接收信号强度法 测试 

分 类 号：TH-3[机械工程]