Image reconstruction method and characteristic for tribo-electric tomography

Masashi Machida1, Meguru Kaminoyama2

1 Process Development Center, Idemitsu Kosan Co., Ltd.

1-1 Anesaki-Kaigan, Ichihara, Chiba, 299-0193 Japan, masashi.machida@si.idemitsu.co.jp

2 Dept. Chemical Engineering, Yokohama National University, 79-5 Tokiwadai Hodogaya-ku, Yokohama, 240-8501, Japan, kamin@ynu.ac.jp

ABSTRACT

Tribo-electric tomography system uses tribo-electric sensors for its sensing method. Tribo-electric sensor detects electrical charges in the sensing zone as a displacement current. This is a passive sensor and its signal intensity highly depends on distance between electrical charge and sensor. Inverse image reconstruction problem for tribo-electric tomography is investigated. The amount measured information and the local sensitivity in the sensing zone are examined with singular value decomposition in various shapes and sizes of pixels. The total amount information about in the sensing zone is limited up to the same number as that of the tribo-electric sensors and the local information about the central area in the sensing zone decreases according to the decrease of signal intensity along with the distance. Results of Scree tests show that the number of principle components corresponds to that of division of sensing zone in circumferential division but that in radius direction.

Keywords Tribo-electric Tomography System, Singular value, Sensitivity, Electrical Field