{
  "$type": "site.standard.document",
  "description": "A wheel load estimation device can include a tire information acquisition unit, a wheel speed acquisition unit, a frequency characteristic ratio calculation unit, a load ratio calculation unit, and a wheel load calculation unit. The tire information acquisition unit can acquire type information…",
  "path": "/patents/1389581",
  "publishedAt": "2026-06-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01M17/013",
    "Sumitomo Rubber Industries, Ltd."
  ],
  "textContent": "A wheel load estimation device can include a tire information acquisition unit, a wheel speed acquisition unit, a frequency characteristic ratio calculation unit, a load ratio calculation unit, and a wheel load calculation unit. The tire information acquisition unit can acquire type information specifying a type of a tire. The wheel speed acquisition unit can acquire wheel speed information representing wheel speed of each wheel of a vehicle. The frequency characteristic ratio calculation unit can calculate front-rear and left-right frequency characteristic ratios. The load ratio calculation unit can calculate front-rear and left-right load ratios. The wheel load calculation unit can calculate a wheel load ratio representing a relative wheel load. The load ratio calculation unit can calculate the front-rear and left-right load ratios, based on first relationship specification information and second relationship specification information, respectively.",
  "title": "WHEEL LOAD ESTIMATION DEVICE, WHEEL LOAD ESTIMATION METHOD, AND WHEEL LOAD ESTIMATION PROGRAM"
}