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:
Dec. 25, 2018
Filed:
Jan. 19, 2016
Google Inc., Mountain View, CA (US);
Aveek Ravishekhar Purohit, Mountain View, CA (US);
Kenneth Louis Herman, San Jose, CA (US);
Google LLC, Mountain View, CA (US);
Abstract
A passive infrared sensor system for detecting the direction of movement by a warm object includes a passive infrared sensor and a lens having multiple lenslets. Different lenslets may have different lens characteristics, for example, different focal lengths or thicknesses, to produce focused infrared beams of different intensities for the sensor. As a warm object, such as a person or an animal, moves from one location to another in the field of view of the sensor, the infrared energy emitted by the warm object may be focused by different lenslets having different focal lengths or thicknesses, and the sensor may detect different intensities at different times. A processor may estimate the direction of movement by performing pattern matching of the detected intensities with a database of patterns based on actual statistics or simulations of movements by warm objects in the environment monitored by the sensor, or known characteristics of the environment and the sensor.