Detection system, detection method, and detection device
AssigneeNEC Corporation
InventorTakashi Kojima
Life of this patent
Estimating the term…
Abstract
A detection system according to the present disclosure includes an optical fiber (10) configured to detect environment information, an acquisition unit (21) configured to acquire the environment information included in an optical signal received from the optical fiber (10), and a detection unit (22) configured to detect an event in the vicinity of the optical fiber (10) on the basis of a first environment pattern based on environment information acquired from an optical signal associated to a first period and a second environment pattern based on environment information acquired from an optical signal associated to a second period.
Claims12
A detection system comprising:
- an optical fiber having a plurality of sections and configured to detect environment information;
- a memory storing instructions;
- and
- at least one processor configured to execute the instructions to:
- acquire, for each section, first and second environment information included in first and second optical signals received from the optical fiber and associated with first and second periods, respectively;
- derive, for each section, a displacement between a first environment pattern based on the first environment information and a second environment pattern based on the second environment information;
- detect, when the displacement for more than one section satisfies a predetermined condition, an event in a vicinity of the optical fiber that is associated with the predetermined condition;
- and
- specify the section for which the displacement satisfying the predetermined condition is largest as being near a position where the event is occurring.
A detection method performed by a detection system and comprising:
- acquiring, for each section of a plurality of sections of an optical fiber configured to detect environment information, first and second environment information included in first and second optical signals received from the optical fiber and associated with first and second periods, respectively;
- deriving, for each section, a displacement between a first environment pattern based on the first environment information and a second environment pattern based on the second environment information;
- detecting, when the displacement for more than one section satisfies a predetermined condition, an event in a vicinity of the optical fiber that is associated with the predetermined condition;
- and
- specifying the section for which the displacement satisfying the predetermined condition is largest as being near a position where the event is occurring.
A detection device comprising:
- a memory storing instructions;
- and
- at least one processor configured to execute the instructions to:
- acquire, for each section of a plurality of sections of an optical fiber configured to detect environment information, first and second environment information included in first and second optical signals received from the optical fiber and associated with first and second periods, respectively;
- derive, for each section, a displacement between a first environment pattern based on the first environment information and a second environment pattern based on the second environment information;
- detect, when the displacement for more than one section satisfies a predetermined condition, an event in a vicinity of the optical fiber that is associated with the predetermined condition;
- and
- specify the section for which the displacement satisfying the predetermined condition is largest as being near a position where the event is occurring.
Dependencies are inferred from the claim text.