Patent ID: 9666063
Date: 2017-05-30
CPC Classifications: F24F,G08B

Claim:
1. A computer-implemented method performed by a data processing apparatus, the method comprising: receiving a signal indicating that a moving heat source was detected by a passive infrared sensor; receiving a signal comprising a current temperature determined by a temperature sensor separate from the passive infrared sensor; determining, based on the current temperature and at least one previous temperature that an area in proximity to the passive infrared sensor has experienced a temperature change; in response to the determination that the area in proximity to the passive infrared sensor has experienced a temperature change, disregarding the signal indicating that a moving heat source was detected by the passive infrared sensor as a false alert and not sending an indication of motion detected; receiving another signal indicating that a moving heat source was detected by the passive infrared sensor; receiving a signal comprising a second current temperature; determining, based on the second current temperature and at least one previous temperature that an area in proximity to the passive infrared sensor has not experienced a temperature change; and in response to the determination that the area in proximity to the passive infrared sensor has not experienced a temperature change, sending an indication of motion detected.