{
  "$type": "site.standard.document",
  "description": "A vehicle speed estimator includes a unit (801) that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit (801) includes: a variable filter…",
  "path": "/patents/991764",
  "publishedAt": "2013-04-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60T8/172",
    "KOMATSU MFG CO LTD [JP]"
  ],
  "textContent": "A vehicle speed estimator includes a unit (801) that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit (801) includes: a variable filter processor (814) that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor (814) having a variable time constant; and a time constant changer (810) that changes the time constant of the variable filter processor (814) in accordance with travel conditions of the construction vehicle.",
  "title": "Vehicle speed estimator and traction control device"
}