{
  "$type": "site.standard.document",
  "description": "An object is to detect an abnormality occurring in a wheel assembly, earlier, based on signals representing a rotation speed of the wheel assembly. An abnormality detection device performs frequency analysis on a first index indicating variation of the rotation speed during one rotation of the…",
  "path": "/patents/1427155",
  "publishedAt": "2026-06-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C23/062",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "An object is to detect an abnormality occurring in a wheel assembly, earlier, based on signals representing a rotation speed of the wheel assembly. An abnormality detection device performs frequency analysis on a first index indicating variation of the rotation speed during one rotation of the wheel assembly, to calculate a gain of each rotational order component at each time point, and calculates a total of gains of predetermined multiple rotational order components as a total gain. The abnormality detection device determines that an abnormality has occurred in the wheel assembly, if an increase rate of the total gain per predetermined time is equal to or greater than a reference increase rate.",
  "title": "ABNORMALITY DETECTION DEVICE, ABNORMALITY DETECTION PROGRAM, AND ABNORMALITY DETECTION METHOD"
}