{
  "$type": "site.standard.document",
  "description": "A method for detecting damage to a bearing of an engine using a knocking sensor includes a data storing step, which stores a vibration signal output from the knocking sensor in a data storing unit, a by-frequency amplitude calculating step, which performs Fast Fourier Transform (FFT) for the…",
  "path": "/patents/1407993",
  "publishedAt": "2023-12-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D31/007",
    "HYUNDAI MOTOR CO LTD [KR]"
  ],
  "textContent": "A method for detecting damage to a bearing of an engine using a knocking sensor includes a data storing step, which stores a vibration signal output from the knocking sensor in a data storing unit, a by-frequency amplitude calculating step, which performs Fast Fourier Transform (FFT) for the vibration signal and calculates an amplitude for each frequency, a detection frequency integrating step, which obtains a detection frequency integration value by adding all amplitudes of detection frequencies, a noise determining step, which determines whether the vibration signal is the vibration signal irrelevant to damage to the bearing by determining whether exclusion frequencies correspond to a preset condition, a counter increasing step, which increases a damage counter, when the detection frequency integration value is greater than a preset damage threshold, and a damage confirming step, which confirms damage to the bearing, when the damage counter equals or exceeds a preset confirmation counter.",
  "title": "SYSTEM AND METHOD FOR DETECTING DAMAGE TO BEARING OF ENGINE USING KNOCKING SENSOR"
}