A one-dimensional magnetoelectric sensor array for magnetic sketching

Although various magnetic sensors have been developed, it is still a challenge to get the imaging of magnetic objects safely and instantaneously, for example, magnetic imaging for capsule positioning, endoscope navigation, and detection of magnetic weapon that is hidden in/on human body. In this paper, a magnetic detecting and sketching system utilizing a one-dimensional magnetic sensor array with 56 magnetoelectric (ME) sensing units is proposed. The ME sensors used in this system are based on a (1-1) connectivity Metglas/piezo-fiber composite operating in longitudinally magnetized and transversely poled (L-T) mode. Simulation and experiment results show that the proposed magnetic detecting system not only can find the 2-D position of a running magnetic metal object, but also can identify its posture and length-diameter ratio. The proposed magnetic detecting method promises an outlook for medical magnetic positioning and security checking.

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51132001, 51072003) and The Beijing Municipal Science and Technology Projects (Grant Nos. Z131100003213020, Z151100003715003).