The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2012
Filed:
Oct. 15, 2008
Shinichi Masubuchi, Tochigi, JP;
Hiroshi Uchida, Tochigi, JP;
Shinichi Masubuchi, Tochigi, JP;
Hiroshi Uchida, Tochigi, JP;
Deed Corporation, Tokyo, JP;
Abstract
To provide a magnetic body detector as a means for warning that a magnetic body enters into a room where a strong magnet, such as an MRI diagnostic system, is installed, wherein a magnetic sensor can detect even a small magnetic body without being saturated even in an environment with strong magnetic flux density; and appropriate notification is provided to a user by arithmetic processing for inhibiting the detected value of a magnetic body that does not pass through a gate. By adjusting a solid angle formed with a detection axis of the magnetic sensor and a vertical axis or a horizontal axis to be within 15 degrees, a strong direct-current magnetic flux density to be applied to the detection axis is reduced; a small change in magnetic flux density due to the entry of a small magnetic body is detectable without saturation; the characteristics of a magnetic body that will not pass through the gate is extracted by the magnetic sensors arranged in the front, rear, left and right of the gate; and only a magnetic body in the vicinity that passes through the gate is regarded as a target for detection by inhibiting magnetic bodies that will not pass through the gate by calculation.