TY - GEN
T1 - Detection of weak magnetic signal for magnetic localization and orientation in capsule endoscope
AU - Li, Mao
AU - Hu, Chao
AU - Song, Shuang
AU - Dai, Houde
AU - Meng, Max Q.H.
PY - 2009
Y1 - 2009
N2 - A permanent magnet is embedded in the capsule endoscope to perform as an excitation source for tracking capsule's position and orientation, and a magnetic sensor array is built around the capsule to capture the signals from magnet. However, the magnet-field signal is weak and attenuates dramatically when the spatial distance between the magnet and the sensor increases. How to detect this weak magnetic signal will be the key factor to influence the tracking accuracy, so a high stable, sensitive, anti-interference magnetic measurement system must be developed. In this paper, we present a weak magnetic signal detection system which is composed of Honeywell 3-axis magnetic sensors, high performance analog multiplexers, low noisy amplifiers, 16 bits A/D converter, and ARM controller. Especially, some processing measures are employed to reduce the sensors' tolerance and enhance the sensitivity and dynamic range of localization system. The experimental results show that this detection system can be effectively applied for the cubic magnetic sensor array with the measurement space of 0.5m×0.5m×0.5m.
AB - A permanent magnet is embedded in the capsule endoscope to perform as an excitation source for tracking capsule's position and orientation, and a magnetic sensor array is built around the capsule to capture the signals from magnet. However, the magnet-field signal is weak and attenuates dramatically when the spatial distance between the magnet and the sensor increases. How to detect this weak magnetic signal will be the key factor to influence the tracking accuracy, so a high stable, sensitive, anti-interference magnetic measurement system must be developed. In this paper, we present a weak magnetic signal detection system which is composed of Honeywell 3-axis magnetic sensors, high performance analog multiplexers, low noisy amplifiers, 16 bits A/D converter, and ARM controller. Especially, some processing measures are employed to reduce the sensors' tolerance and enhance the sensitivity and dynamic range of localization system. The experimental results show that this detection system can be effectively applied for the cubic magnetic sensor array with the measurement space of 0.5m×0.5m×0.5m.
KW - Magnetic localization and orientation
KW - Magnetic sensor
KW - Weak signal detection
KW - Wireless capsule endoscope
UR - https://www.scopus.com/pages/publications/70450169089
U2 - 10.1109/ICAL.2009.5262793
DO - 10.1109/ICAL.2009.5262793
M3 - 会议稿件
AN - SCOPUS:70450169089
SN - 9781424447954
T3 - Proceedings of the 2009 IEEE International Conference on Automation and Logistics, ICAL 2009
SP - 900
EP - 905
BT - Proceedings of the 2009 IEEE International Conference on Automation and Logistics, ICAL 2009
T2 - 2009 IEEE International Conference on Automation and Logistics, ICAL 2009
Y2 - 5 August 2009 through 7 August 2009
ER -