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:
Jan. 31, 2006
Filed:
Dec. 18, 2003
Applicants:
Masatoshi Tsuji, Ohtsu, JP;
Michinori Noguchi, Ohtsu, JP;
Cholmin Seo, Ohtsu, JP;
Inventors:
Assignee:
Optex Co., Ltd., Shiga, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The combined sensor of the present invention is comprised of an MW sensor and a PIR sensor, in which the frequency difference of two microwaves transmitted by the MW sensor is set such that the phase difference between the IF signals received by the MW sensor is approximately 180° when there is an object at the intermediate distance between the maximum detection distance within the target detection area and the maximum detection distance in the event of a deviation of the detection area attributable to mounting error of the infrared sensor