{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "Provided is a safety apparatus performing an accurate safety control regardless of the posture of an upper revolving body of a work machine. The safety apparatus includes: obstacle sensors (61 to 64) provided in the upper revolving body; a revolving angle detector (66); an upper-side coordinate…",
  "path": "/patents/1425787",
  "publishedAt": "2023-03-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60W30/09",
    "KOBELCO CONSTR MACH CO LTD [JP]"
  ],
  "textContent": "Provided is a safety apparatus performing an accurate safety control regardless of the posture of an upper revolving body of a work machine. The safety apparatus includes: obstacle sensors (61 to 64) provided in the upper revolving body; a revolving angle detector (66); an upper-side coordinate position calculation section (71) that calculates an upper-side coordinate position of the obstacle in the upper-side coordinate system using the upper revolving body as a reference; a lower-side judgment area setting section (72) that sets a lower-side judgment area in the lower-side coordinate system using the lower traveling body as a reference; a coordinate transformation section (73) that transforms one of the upper-side coordinate position and the position of the lower-side judgment area into the other coordinate system to unify the coordinate system; a lower-side approach judgment section (74) that judges whether an obstacle exists within the lower-side judgment area in the unified coordinate system; and a safety operation command section (78) that outputs a safety operation command based on the judgment result.",
  "title": "SAFETY DEVICE FOR REVOLVING-TYPE WORK MACHINE"
}