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公开(公告)号：US20170098356A1
公开(公告)日：2017-04-06
申请号：US14876042
申请日：2015-10-06
Applicant: Google Inc.
Inventor： Andrew Dai , Evan Witty
CPC classification number: G08B13/2491 , G01R33/0023 , G01R33/02 , G08B13/08 , G08B25/14 , G08B29/046
Abstract: Systems and techniques are provided for an opening sensor with magnetic field detection. A current magnetic field vector based on a strength and direction of a magnetic field detected by a magnetometer of an opening sensor disposed at an entry point may be received. The current magnetic field vector may be compared to an initial magnetic field vector for the opening sensor. It may be determined that the current magnetic field vector differs from the initial magnetic field vector by a threshold amount or more. A signal may be generated indicating that the opening sensor has been tripped. The opening sensor may include a magnet in a separate housing from a magnetometer sensor comprising the magnetometer. The opening sensor may include a magnetometer unit with a magnet in the same housing as a magnetometer sensor.
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公开(公告)号：US20170131149A1
公开(公告)日：2017-05-11
申请号：US14933088
申请日：2015-11-05
Applicant: Google Inc.
Inventor： Evan Witty , Andrew Dai
CPC classification number: G01J5/522 , G01J5/026 , G01J5/0896 , G01J5/34 , G01J2005/0048
Abstract: A passive infrared sensor having a radiation capture component may be housed within a sensor device. The device may also house radiation emission components, such as light emitting diodes, in proximity to the capture component. Electronic circuitry within the device may generate a signal that causes the emission components to emit radiation that includes wavelengths in the infrared spectrum. The infrared radiation may be captured at the capture component. Characteristics of a signal generated by the capture component may be compared to test characteristics. Based on this comparison, it may be determined that the passive infrared sensor is not operating properly.
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公开(公告)号：US10012548B2
公开(公告)日：2018-07-03
申请号：US14933088
申请日：2015-11-05
Applicant: Google Inc.
Inventor： Evan Witty , Andrew Dai
CPC classification number: G01J5/522 , G01J5/026 , G01J5/0896 , G01J5/34 , G01J2005/0048
Abstract: A passive infrared sensor having a radiation capture component may be housed within a sensor device. The device may also house radiation emission components, such as light emitting diodes, in proximity to the capture component. Electronic circuitry within the device may generate a signal that causes the emission components to emit radiation that includes wavelengths in the infrared spectrum. The infrared radiation may be captured at the capture component. Characteristics of a signal generated by the capture component may be compared to test characteristics. Based on this comparison, it may be determined that the passive infrared sensor is not operating properly.
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