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Forest fire early-warning system and method based on infrared thermal imaging technology

  • US 9,666,050 B2
  • Filed: 06/05/2012
  • Issued: 05/30/2017
  • Est. Priority Date: 06/09/2011
  • Status: Active Grant
First Claim
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1. A forest fire alarm system based on infrared thermal imaging technology comprising:

  • an infrared camera located within a monitored area for monitoring and early fire warning in a forest, the infrared camera configured to capture infrared thermal images of said monitored area, and to transmit infrared thermal analog signals which contain temperature measurement values T relating to the infrared thermal images of the monitored area, and wherein the infrared camera includes a frontal temperature measurement and alarm module configured to;

    determine a preset alarm temperature Tset either set as a constant value or a variable constant value based on both statistical values of the temperature measurement values T and fire temperature in the monitored area;

    determine an isothermal allowed width δ

    t either set as a constant temperature difference value or a variable temperature difference value based on both the statistical values of the temperature measurement values T and the fire temperature in the monitored area;

    determine an average temperature TS of a reference area S within the monitored area;

    calculate, based on changes of environmental temperature parameters including at least one of distance, temperature difference and alternate seasons, an alarm temperature value Talarm determined as a sum of the average temperature TS and the isothermal allowed width δ

    t; and

    transmit alarm signals when a hottest temperature spot Th automatically captured based on the temperature measurement values T exceeds the lower of the alarm temperature Tset and the alarm temperature value Talarm.

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