Human detection system for work vehicle, and work vehicle equipped with same

{
  "publication_number": "US11120558B2",
  "country": "US",
  "kind": "B2",
  "title": "Human detection system for work vehicle, and work vehicle equipped with same",
  "abstract": "A human detection system 18 includes: a camera 19 that acquires detection image data Dd of a detection region D, the detection region D being a prescribed region including a portion of a crane 1; a deviation determination unit 21 c in which image data of the crane 1 included in the detection image data Dd acquired by the camera 19 in a state of being disposed at a reference position is set as reference image data Sd of the detection region D, and in which the detection image data Dd of the detection region D acquired at an arbitrary time by the camera 19 is compared to the reference image data Sd to determine whether the position of the camera 19 has deviated from the reference position; and a reporting unit 21 d that reports that the position of the camera 19 has deviated.",
  "claims": [
    "1. A human detection system for a work vehicle, the human detection system comprising: an image data obtainment section that obtains detection image data of a detection region, wherein a predetermined region including a part of the work vehicle is set to be the detection region; a shift determination section that determines whether a position of the image data obtainment section is shifted with respect to a reference position, the determination being made by comparison between the detection image data and reference image data of the detection region, the detection image data being obtained by the image data obtainment section at any time point, wherein image data of the work vehicle included in the detection image data obtained by the image data obtainment section disposed at the reference position is set to be the reference image data of the detection region; a notification section that notifies that the position of the image data obtainment section is shifted; and an image display section; wherein, when the shift determination section determines whether the position of the image data obtainment section is shifted with respect to the reference position, the shift determination section, by using a Support Vector Machine (SVM) learning algorithm, compares between the detection image data obtained by the image data obtainment section at any time point and the reference image data of the detection region, and when the shift determination section determines that the position of the image data obtainment section is shifted, a confirmatory figure based on the reference image data is displayed on the image display section in such a manner as to be superimposed on image data of the detection region.",
    "2. A work vehicle, comprising the human detection system for the work vehicle according to claim 1."
  ],
  "description_excerpt": "The present invention relates to a human detection system for a work vehicle, and a work vehicle provided with the same.\n\nConventionally, in work vehicles such as cranes and the like, the visual field of an operator from an operator's seat may be obstructed by a boom or the like stored in a vehicle during traveling. Some of the work vehicles include a camera for obtaining an image of an area corresponding to a blind spot from the operator's seat in order to secure the operator's visual field. Those work vehicles are configured to capture by the camera an image of the area unseeable from the operator's seat, and display the obtained image on a monitor at the operator's seat. Further, others of the work vehicles are known, which include an obstacle notification system that determines whether or not an obstacle is included in a specific area of an image obtained by a camera, and that notifies an operator of a result (see, e.g., Patent Literature (hereinafter, referred to as “PTL”) 1).\n\nIn a work vehicle described in PTL 1 that is a rough terrain crane, a cabin as an operator's seat and a telescopic boom are mounted via a swivel base on a carrier having a traveling function. On the swivel base, the cabin is disposed on the right side in the traveling direction and the telescopic boom is disposed on the left side in the traveling direction. Accordingly, in the rough terrain crane, a blind spot occurs due to the telescopic arm obstructing the visual field of the operator from the driver's seat toward the left side in the traveling direction.",
  "cpc": [
    "G06T 7/20",
    "B60R 1/00",
    "B60R 1/24",
    "B60R 2300/8093",
    "B66C 13/16",
    "B66C 13/46",
    "B66C 15/065",
    "B66C 23/88",
    "E02F 9/24",
    "E02F 9/261",
    "G06T 2207/10016",
    "G06T 2207/30252",
    "G06T 7/00",
    "G06T 7/74",
    "G08B 25/00",
    "G08B 29/20",
    "H04N 7/18",
    "H04N 7/183"
  ],
  "ipc": [
    "B60R 1/00",
    "B66C 13/16",
    "B66C 15/06",
    "E02F 9/24",
    "E02F 9/26",
    "G06K 9/00",
    "G06T 7/20",
    "G06T 7/73",
    "H04N 7/18"
  ],
  "assignees": [
    "Tadano Ltd"
  ],
  "inventors": [
    "Iwao ISHIKAWA",
    "Tomohiro TOYOSAKI",
    "Masafumi Takahashi"
  ],
  "filing_date": "2018-03-09",
  "publication_date": "2021-09-14",
  "grant_date": "2021-09-14",
  "priority_date": "2017-03-10",
  "application_number": "US-201816488070-A",
  "family_id": "63447885",
  "cited_by_count": 0,
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  ]
}