Object detection system, object detection method, and non-transitory computer-readable medium storing object detection program
First Claim
Patent Images
1. An object detection system comprising:
- a reader waveguide formed as an open transmission line;
an RFID tag placed above the reader waveguide, the RFID tag being placed in such a manner that a positional relationship between the RFID tag and the reader waveguide is predetermined regardless of a presence or an absence of an object;
a signal strength acquisition unit that acquires signal strength of a read signal read from the RFID tag by electromagnetic coupling through the reader waveguide; and
an object detection unit that detects physical characteristics of the object corresponding to the acquired signal strength based on a relationship between three or more values of signal strength of the read signal and physical characteristics of the object to be detected.
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Abstract
An object detection system includes a reader waveguide (101) formed as an open transmission line, an RFID tag (102) placed above the reader waveguide (101), a signal strength acquisition unit (103) that acquires signal strength of a read signal read from the RFID tag (102) by electromagnetic coupling through the reader waveguide (101), and an object detection unit (104) that detects physical characteristics of an object (105) corresponding to the acquired signal strength based on a relationship between a plurality of (three or more values of) signal strength of the read signal and physical characteristics of the object to be detected.
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Citations
19 Claims
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1. An object detection system comprising:
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a reader waveguide formed as an open transmission line; an RFID tag placed above the reader waveguide, the RFID tag being placed in such a manner that a positional relationship between the RFID tag and the reader waveguide is predetermined regardless of a presence or an absence of an object; a signal strength acquisition unit that acquires signal strength of a read signal read from the RFID tag by electromagnetic coupling through the reader waveguide; and an object detection unit that detects physical characteristics of the object corresponding to the acquired signal strength based on a relationship between three or more values of signal strength of the read signal and physical characteristics of the object to be detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An object detection method comprising:
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acquiring signal strength of a read signal read from an RFID tag placed above a reader waveguide formed as an open transmission line by electromagnetic coupling through the reader waveguide, the RFID tag being placed in such a manner that a positional relationship between the RFID tag and the reader waveguide is predetermined regardless of a presence or an absence of an object; and detecting physical characteristics of the object corresponding to the acquired signal strength based on a relationship between three or more values of signal strength of the read signal and physical characteristics of the object to be detected.
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18. A non-transitory computer-readable medium storing an object detection program causing a computer to execute an object detection process, the object detection process comprising:
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acquiring signal strength of a read signal read from an RFID tag placed above a reader waveguide formed as an open transmission line by electromagnetic coupling through the reader waveguide, the RFID tag being placed in such a manner that a positional relationship between the RFID tag and the reader waveguide is predetermined regardless of a presence or an absence of an object; and detecting physical characteristics of the object corresponding to the acquired signal strength based on a relationship between three or more values of signal strength of the read signal and physical characteristics of the object to be detected.
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19. An object detection system comprising:
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a reader waveguide formed as an open transmission line; an RFID tag placed above the reader waveguide, the RFID tag being placed in such a manner that a positional relationship between the RFID tag and the reader waveguide is predetermined regardless of a presence or an absence of an object; a signal strength acquisition means for acquiring signal strength of a read signal read from the RFID tag by electromagnetic coupling through the reader waveguide; and an object detection means for detecting physical characteristics of the object corresponding to the acquired signal strength based on a relationship between three or more values of signal strength of the read signal and physical characteristics of the object to be detected.
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Specification