Method of inspecting a surface of a component using a probe

{
  "publication_number": "US11650129B2",
  "country": "US",
  "kind": "B2",
  "title": "Method of inspecting a surface of a component using a probe",
  "abstract": "A method of inspecting a surface of a component, e.g. a turbine or compressor blade of a gas turbine engine. The method comprises (a) providing a probe for inspecting the component surface; (b) defining a reference surface that is offset from the component surface; (c) moving the probe so as to contact a plurality of discrete spaced apart inspection points on the component surface, each contact of the probe with an inspection point comprising a first movement of the probe from the reference surface to the inspection point; (d) retracting the probe from the component surface after each contact with an inspection point; and (e) inspecting the component surface each time the probe contacts an inspection point.",
  "claims": [
    "1. A method of inspecting a surface of a component, the method comprising the steps of: providing a probe for inspecting the component surface, wherein the probe is an eddy current probe; defining a reference surface that is offset from the component surface; moving the probe so as to contact a plurality of discrete spaced apart inspection points on the component surface, each contact of the probe with an inspection point comprising a first movement of the probe from the reference surface to the inspection point; retracting the probe from the component surface after each contact with an inspection point; and inspecting the component surface each time the probe contacts an inspection point, wherein the inspection comprises eddy current testing.",
    "2. The method of claim 1, wherein movement of the probe is along a tool path and the method further comprises defining the tool path.",
    "3. The method of claim 1, wherein the probe is spring loaded.",
    "4. The method of claim 1, wherein the probe includes a camera and an illuminated camera system.",
    "5. The method of claim 1, wherein the component is a blade or vane of a gas turbine engine.",
    "6. The method of claim 1, further comprising receiving a continuous time-based signal from the probe and identifying portions of the signal that are associated with the probe being in contact with an inspection point of the component surface.",
    "7. The method of claim 6, further comprising determining, for each of the portions of the signal, whether the portions of the signal are indicative of a defect in the component surface.",
    "8. The method of claim 1, wherein each contact of the probe with an inspection point further comprises a second movement of the probe from the inspection point to the reference surface.",
    "9. The method of claim 8, wherein the first and second movements of the probe are each in a direction that is normal to the component surface at the inspection point.",
    "10. The method of claim 8, wherein the first and second movements of the probe are each in a direction that is at an angle to a direction normal to the component surface at the inspection point.",
    "11. The method of claim 8, wherein each contact of the probe with an inspection point further comprises a third movement of the probe along the reference surface.",
    "12. The method of claim 1, wherein the probe is mounted to a robotic device.",
    "13. The method of claim 12, wherein the probe is moved relative to the robotic device.",
    "14. The method of claim 12, wherein movement of the probe is by the robotic device and the probe is maintained in a fixed position relative to the robotic device throughout the movement of the probe.",
    "15. The method of claim 14, wherein movement of the probe along the reference surface is provided by moving the robotic device while maintaining the probe in a fixed position relative to the robotic device, and each movement of the probe towards or away from the component surface is performed by moving the probe relative to the robotic device."
  ],
  "description_excerpt": "The present disclosure relates to a method of inspecting a component, more particularly the surface of a component. The method may have particular, but not exclusive, use in inspecting components or parts of components that are generally inaccessible and have complex geometries such as turbine or compressor blades of gas turbine engines.\n\nMachines often rely on the integrity of their components in order to operate in an efficient and safe manner. Thus, inspection of components that may be damaged during operation of the machine, or which may be manufactured with defects, is important for the continued operation of the machine.\n\nComponents such as compressor and turbine blades of gas turbine engines are subjected to extremes of temperatures for prolonged periods and the lives of passengers and crew travelling on aircraft powered by such engines rely on their integrity. Such blades can develop defects however inspecting them for defects is complicated by being generally inaccessibly located within the engine and typically having complex geometries. One can dismantle an engine to inspect the integrity of the compressor and turbine blades however that is a costly and time consuming operation. Having dismantled an engine, if blades are found to be only partially worn and yet well within safety requirements, they are typically replaced rather than left for a subsequent dismantling, re-inspection and rebuilding of the engine. This can be very wasteful and expensive. It is also important that the compressor and turbine blades are not damaged by the process of dismantling the engine, inspecting the blades and rebuilding the engine.",
  "cpc": [
    "G01M 15/14",
    "B25J 9/1679",
    "G01B 7/285",
    "G01B 7/34",
    "G01N 27/90",
    "G01N 27/902"
  ],
  "ipc": [
    "B25J 9/16",
    "G01M 15/14"
  ],
  "assignees": [
    "Rolls Royce PLC"
  ],
  "inventors": [
    "Alejandro JEKETO",
    "Ben J Walker",
    "James KELL"
  ],
  "filing_date": "2021-11-12",
  "publication_date": "2023-05-16",
  "grant_date": "2023-05-16",
  "priority_date": "2020-11-17",
  "application_number": "US-202117454703-A",
  "family_id": "74046609",
  "cited_by_count": 0,
  "citations": [
    "US4069589A",
    "US5265667A",
    "US6076407A",
    "US6339326B1",
    "US20020093330A1",
    "US20020097045A1",
    "US20050171733A1",
    "US6959267B2",
    "US20090030648A1",
    "US20070277600A1",
    "US20080257024A1",
    "US20090185177A1",
    "US8045144B2",
    "US20100101105A1",
    "US20100207619A1",
    "US20100244869A1",
    "US20110267047A1",
    "US8395378B2",
    "US8749230B1",
    "US20140327735A1",
    "US20130321015A1",
    "JP2016080507A",
    "US20190162756A1",
    "CN107228610A",
    "US20200393524A1"
  ]
}