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:
Aug. 11, 2020
Filed:
Jul. 31, 2018
Greenwave Systems Pte. Ltd., Singapore, SG;
Eric Scott Micko, Singapore, SG;
Fu Kin Fong, Hong Kong, HK;
Other;
Abstract
A motion sensor includes an infrared detector having a single linear array of at least four detector elements disposed on a substrate. The motion sensor also includes an optical system to simultaneously direct electromagnetic energy from two or more curtains of monitored volumes onto the linear array of detector elements. The two or more curtains of the monitored volumes having a tilt angle from a vertical orientation of the motion sensor to create a quadrature horizontal spatial relationship between the monitored volumes. Signals from the linear array of detector elements are then processed to detect a quadrature phase relationship between the signals, and an indication of human presence is provided if a quadrature phase relationship is found.