NDLI: A new calibration method for magnetic sensor array for tracking capsule endoscope

Content Provider	IEEE Xplore Digital Library
Author	Mao Li Shuang Song Chao Hu Wanan Yang Lujia Wang Meng, M.Q.-H.
Copyright Year	2009
Description	Author affiliation: CAS/CUHK Shenzhen Institute of Advanced Integration, Key Lab for Biomedical Informatics & Health Eng. CAS Shenzhen Key Lab for Low-Cost Health, Shenzhen, China (Shuang Song; Chao Hu; Wanan Yang; Lujia Wang) \|\| CAS/CUHK Shenzhen Institute of Advanced Integration, Key Lab for Biomedical Informatics & Health Eng. CAS Shenzhen Key Lab for Low-Cost Health (Mao Li) \|\| Department of Electronic Engineering, The Chinese University of HongKong. Shatin, N.T. HongKong (Meng, M.Q.-H.)
Abstract	To track the movement of wireless capsule endoscope in the human body, we design a magnetic localization and orientation system. In this system, capsule contains a permanent magnet as the movable object. A wearable magnetic sensor array is arranged out of the human body to capture the magnetic signal. This sensor array is composed of magnetic sensors, Honeywell product HMC1043. The variations of magnet field intensity and direction are related to the capsule position and orientation. Therefore, the 3D localization information and 2D orientation parameters of capsule can be computed based on the captured magnetic signals and by applying an appropriate algorithm. In order to initialize the system and improve the tracking accuracy, we propose a calibration technique based on high-accurate localization equipment, FASTRAK. The calibration method includes two steps. Firstly, we acquire the accurate reference data from FASTRAK tracking equipment, and transform them into the position and orientation parameters of the magnet. Secondly, we calculate three important parameters for the sensor calibration: the sensitivity, the center position, and the orientation. Based on the calibration, we can adjust the magnetic localization and orientation system quickly and accurately. The experimental results prove that the calibration method used in our system can improve the system with satisfactory tracking accuracy.
Starting Page	1561
Ending Page	1566
File Size	242987
Page Count	6
File Format	PDF
ISBN	9781424447749
DOI	10.1109/ROBIO.2009.5420397
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Calibration Magnetic sensors Endoscopes Humans Tracking Wireless sensor networks Permanent magnets Wearable sensors Magnetic devices
Content Type	Text
Resource Type	Article

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