Versatile optical fiber sensor and method for detecting red palm weevil, farm fires, and soil moisture
AssigneeKing Abdullah University of Science and Technology
InventorsBoon Siew Ooi, Yuan Mao, Islam Ashry
Life of this patent
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Abstract
An integrated system for detecting a red palm weevil (RPW), farm fire, and soil moisture includes an optical fiber configured to be extending to a tree, and a distributed acoustic sensor (DAS) box connected to the optical fiber. The DAS box is configured to process first to third different optical signals reflected from the optical fiber, to determine a presence of the RPW from the first optical signal, a temperature at a location along the optical fiber from the second optical signals, and a moisture at a location around the tree from the third optical signal.
Claims17
An integrated system for detecting a red palm weevil (RPW), farm fire, and soil moisture, the system comprising:
- an optical fiber configured to be extending to a tree;
- and
- a distributed acoustic sensor (DAS) box connected to the optical fiber, wherein the DAS box includes a first digital signal processor, a second digital signal processor, different from the first digital signal processor, and a wavelength-division-multiplexing (WDM) filter,
- the WDF filter is configured to filter a reflected optical signal, from the optical fiber, to generate first to third different optical signals,
- the first optical signal is routed to the first digital signal processor to determine a presence of the RPW,
- the second optical signals are routed to the second digital signal processor to determine a temperature at a location along the optical fiber, and
- the third optical signal is routed to the first digital signal processing to determine a moisture at a location around the tree.
An integrated system for detecting a red palm weevil (RPW), farm fire, and soil moisture, the system comprising:
- an optical fiber including a pair of Fiber Bragg Gratings (FBGs), and configured to be extending to a tree;
- and
- a distributed acoustic sensor (DAS) box connected to the optical fiber,
- wherein the DAS box includes a first digital signal processor, a second digital signal processor, different from the first digital signal processor, and a wavelength-division-multiplexing (WDM) filter,
- the WDM filter is configured to filter a reflected optical signal from the optical fiber to generate a Rayleigh signal, Stokes Raman and Anti-Stokes Raman signals, and FBGs signals generated by the pair of FBGs,
- the DAS box includes a first digital signal processor configured to process the Rayleigh signal to determine a presence of the RPW,
- the DAS box further includes a second digital signal processor, different from the first digital signal processor, and configured to process the Stokes Raman and Anti-Stokes Raman signals to determine a temperature at a location along the optical fiber, and
- the first digital signal processor is also configured to process the FBGs signals to determine a moisture at a location around the tree.
Dependencies are inferred from the claim text.