{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "A keyless entry device capable of easily distinguishing between a request signal from a fraudulent relay device and a request signal transmitted from a true vehicle-side device is provided. A vehicle-side device includes a vehicle-side control un it that controls transmission of a request signal…",
  "path": "/patents/924476",
  "publishedAt": "2017-07-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R25/24",
    "ALPS ELECTRIC CO LTD [JP]"
  ],
  "textContent": "A keyless entry device capable of easily distinguishing between a request signal from a fraudulent relay device and a request signal transmitted from a true vehicle-side device is provided. A vehicle-side device includes a vehicle-side control un it that controls transmission of a request signal and performs predetermined control when authentication is successful on th e basis of an answer signal, a portable device includes a port able-device control unit that detects reception intensity info rmation of the request signal transmitted from the vehicle-sid e device and transmits an answer signal based on the reception intensity, the vehicle-side control unit controls a vehicle-s ide transmission unit so that the vehicle-side transmission un it transmits the request signal including the determination si gnal having an intensity level different for each section, and the vehicle-side control unit or the portable-device control unit determines whether or not the request signal is a true si gnal on the basis of a fluctuation in the reception intensity in each section of the determination signal received by the po rtable device.",
  "title": "KEYLESS ENTRY DEVICE"
}