# US 2018/0321028 A1 · Device for the contactless three-dimensional inspection of blades for a turbomachine, especially an aircraft turbine or jet engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0321028 A1 - Document ID: US20180321028A1 - Status: Published application - Kind: A1 - Application number: 15/969,320 - Filed: 2018-05-02 - Published: 2018-11-08 - Earliest claimed: 2015-11-02 - Assignees: Mesure-Systems3D SAS - Applicants: Mesure-Systems3D - Inventors: Didier Le Neel - Web page: https://patentgrep.com/patent/US20180321028A1 ## CPC - G01B 11/2518: {Projection by scanning of the object} - G01B 11/2522: {the position of the object changing and being recorded} - G01B 11/245: using a plurality of fixed, simultaneously operating transducers ({G01B11/2408 - G01B11/2425, } G01B11/255 take precedence) - F05D 2260/80: Diagnostics - F05D 2260/83: Testing, e.g. methods, components or tools therefor - G01B 2210/46: with one or more detectors on a single side of the object to be measured and with a transmitter on the other side - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract An inspection device for contactless three-dimensional inspection of a blade for a turbomachine. The device includes at least one first pair of laser measurement modules to scan the blade and a rotational drive to rotate, about the main axis, the blade relative to the modules along the main axis of the blade. The device then rebuilds a three-dimensional virtual representation of the blade using data coming from the scan and performs a dimensional inspection using the three-dimensional representation. Each pair of modules includes a first module oriented towards a first face of the blade and a second module oriented towards a second face of the blade. The modules are oriented relative to the blade so that during rotation, the modules scan the faces of the blade on the entire rim of the blade, and during translation of the blade along the main axis, the faces are scanned throughout their height. ## Claims ### Claim 1 A device for contactless three-dimensional inspection of a blade for a turbomachine, said blade comprising a body extending radially along a main axis between a blade root and a blade tip with a defined height, and comprising a first main face and a second main face terminated by a leading edge and a trailing edge, said device comprising: at least one first pair of laser measurement modules to scan the blade; a rotational drive, which rotationally drives, about the main axis, said blade relative to the laser measurement modules or vice versa, a translational drive, which drives, in translation along the main axis, said blade relative to the laser measurement modules or vice versa; a data processor; and a non-transitory computer-readable medium comprising software instructions stored thereon, which when executed by the data processor configure the data processor to perform acts comprising: building a three-dimensional virtual representation of said blade using data coming from said at least one first pair of laser measurement modules; dimensionally inspecting using said rebuilt three-dimensional virtual representation to produce an inspection result; each pair of laser measurement modules comprising a first module oriented towards a first face of said blade and a second module oriented towards a second face of said blade; said laser measurement modules being oriented relative to said blade so that: during a rotation of said modules or of said blade about the main axis, said modules scan the first and second faces of said blade on an entire rim of said blade, and during a translation of said modules or of said blade along the main axis, said modules scan the first and second faces of said blade throughout their height. ### Claim 2 (depends on 1) The device according to claim 1, wherein each laser measurement module comprises a source of emission of a laser beam oriented relative to the main axis and relative to a tangential axis of said blade and a laser beam receiver oriented to pick up the laser beam coming from said blade. ### Claim 3 (depends on 2) The device according to claim 2, wherein the laser beam is oriented relative to the main axis by a first angle ranging from 10 to 45 degrees and relative to the tangential axis by a second angle ranging from 10 to 45 degrees. ### Claim 4 (depends on 1) The device according to claim 1, wherein the rotational drive and the translational drive are activated simultaneously or sequentially. ### Claim 5 (depends on 1) The device according to claim 1, wherein the modules are provided with a line-type laser emitting source. ### Claim 6 A device for contactless three-dimensional inspection of a blade for a turbomachine, said blade comprising a body extending radially along a main axis between a blade root and a blade tip with a defined height, and comprising a first main face and a second main face terminated by a leading edge and a trailing edge, said device comprising: means for scanning said blade, said means for scanning comprising at least one first pair of laser measurement modules (2A, 2B), and means for rotationally driving, about the main axis, said blade relative to the laser measurement modules or vice versa, means for driving, in translation along the main axis, said blade relative to the laser measurement modules or vice versa; means for building a three-dimensional virtual representation of said blade using data coming from said scanning means; means for dimensionally inspecting using said rebuilt three-dimensional virtual representation to produce an inspection result; each pair of laser measurement modules comprising a first module oriented towards a first face of said blade and a second module oriented towards a second face of said blade; said laser measurement modules being oriented relative to said blade so that: during a rotation of said modules or of said blade about the main axis, said scanning means scan the first and second faces of said blade on an entire rim of said blade, and during a translation of said modules or of said blade along the main axis, said scanning means scan the first and second faces of said blade throughout their height.