# US 10,373,388 B2 · Augmented-reality test method and test bench for a turbine engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,388 B2 - Document ID: US10373388B2 - Status: Granted - Kind: B2 - Application number: 15/590,719 - Filed: 2017-05-09 - Published: 2017-11-09 - Granted: 2019-08-06 - Earliest claimed: 2016-05-09 - Assignees: Safran Aero Boosters SA - Applicants: Safran Aero Boosters SA - Inventors: Jean-François Colson - Web page: https://patentgrep.com/patent/US10373388B2 ## CPC - G06T 19/006: {Mixed reality (object pose determination, tracking or camera calibration for mixed reality G06T7/00)} - G01M 15/14: Testing gas-turbine engines or jet-propulsion engines - G01N 21/8803: {Visual inspection (measuring projectors G01B9/08)} - G01N 21/8806: {Specially adapted optical and illumination features} - G06T 7/001: {using an image reference approach} - G06T 15/205: {Image-based rendering} - F01D 21/003: {Arrangements for testing or measuring (for measuring vibrations G01H)} - F05D 2260/12: Testing on a test bench - F05D 2260/81: Modelling or simulation - F05D 2270/8041: Cameras - G06T 7/74: {involving reference images or patches} - G06T 2200/04: involving 3D image data - G06T 2207/30108: Industrial image inspection - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A method for testing a turbojet engine for an aircraft in a U-shaped or open-air test bench includes: (a) visual inspection of the test bench and of the turbojet engine; and (b) testing of the turbojet engine in the test bench. During the test, the turbojet engine bears test equipment with sensors, other sensors being housed in the test bench. The test bench includes an augmented-reality system performing the step of (a) visual inspection in the test bench in order to detect a possible major anomaly in the test bench. The step of (a) visual inspection is intended to check the conformity of the test conditions, and especially those of the test equipment or that of the test bench as a whole. The method performs the step of (b) testing only in the absence of an anomaly. ## Claims ### Claim 1 A method for testing in running a turbine engine in a test bench, the method comprising: (a) visual inspection; and (b) testing of the turbine engine in the test bench; wherein the test bench comprises: an augmented-reality system performing the step of (a) visual inspection in the test bench in order to detect any possible anomaly of a first type; the method only performing the step of (b) testing in the absence of an anomaly of the first type identified by the augmented-reality system; and wherein items of test equipment are placed in the test bench and on the turbine engine, the step of (a) inspection comprising: inspection of identity and positioning of said items of test equipment. ### Claim 2 (depends on 1) The method for testing a turbine engine according to claim 1, wherein during the step of (a) inspection, feature points are checked inside the test bench in order to detect one or more anomalies of the first type. ### Claim 3 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the augmented-reality system comprises: a database with one or more virtual images; and during the step of (a) inspection the augmented-reality system compares the test bench and/or the turbine engine with said one or more virtual images so as to identify an anomaly of the first type. ### Claim 4 (depends on 3) The method for testing a turbine engine according to claim 3, wherein the database contains virtual images of intruding elements, and during the step of (a) inspection, the system checks the absence of intruding elements and the augmented-reality system signals an anomaly of the first type in the case that an intruding element is detected. ### Claim 5 (depends on 1) The method for testing a turbine engine according to claim 1, wherein during the step of (a) inspection, the augmented-reality system produces a virtual image which it compares with a virtual image that is free of an anomaly of the first type. ### Claim 6 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the step of (a) inspection comprises: an inspection of sensors inside the test bench. ### Claim 7 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the step of (a) inspection comprises: a succession of steps of checking different parameters, and the method continues the succession of checking steps only in the absence of an anomaly of the first type, and stops the succession of checking steps if an anomaly of the first type is detected. ### Claim 8 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the test bench comprises: a corridor in which the turbine engine is disposed during the step of (a) inspection and/or during the step of (b) testing, the step of (a) inspection being at least partially carried out by an operator in said corridor. ### Claim 9 (depends on 8) The method for testing a turbine engine according to claim 8, wherein the test bench comprises: a test control room adjoining the corridor, the step of (a) inspection being at least partially carried out by an operator in said room. ### Claim 10 (depends on 1) The method for testing a turbine engine according to claim 1, wherein during the step of (b) testing, the augmented-reality system displays a temperature of a flow passing through the test bench, and a flow rate of a flow passing through the test bench, and a temperature of a flow passing through the test bench. ### Claim 11 (depends on 1) The method for testing a turbine engine according to claim 1, wherein during the step of (b) testing, the augmented-reality system displays a vibration level in the test bench. ### Claim 12 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the augmented-reality system comprises: a display module which displays an image to a user, said image comprising: an alert signal in the case that an anomaly of the first type is detected. ### Claim 13 (depends on 12) The method for testing a turbine engine according to claim 12, wherein the turbine engine is visible from the display module. ### Claim 14 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the augmented-reality system comprises: at least one or more cameras filming the turbine engine during the step of (a) inspection. ### Claim 15 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the turbine engine is a turbojet engine or a turboprop adapted to generate an aircraft propulsive jet. ### Claim 16 (depends on 1) The method for testing a turbine engine according to claim 1, wherein the augmented-reality system remains active during the step of (b) testing, and continues the visual inspection of the test bench during the step of (b) testing. ### Claim 17 A method for testing in running a turbine engine in a test bench, the method comprising the following steps: (a) visual inspection; and (b) testing of the turbine engine in the test bench; wherein the test bench comprises: an augmented-reality system performing the step of (a) visual inspection in the test bench in order to detect any possible anomaly of a first type, and any possible anomaly of a second type; the method performing the step of (b) testing in the absence of an anomaly of the first type, and in the presence of an anomaly of the second type identified by the augmented-reality system; and wherein items of test equipment are placed in the test bench and on the turbine engine, the step of (a) inspection comprising: inspection of identity and positioning of said items of test equipment. ### Claim 18 A test bench for a turbine engine, comprising: an augmented-reality system configured to carry out an internal visual inspection in the test bench in order to detect at least one anomaly of a first type, the test bench comprising: a computer program being configured to perform a running test of the turbine engine in the absence of an anomaly of the first type identified by the augmented-reality system which is designed and configured to inspect an identity and a positioning of items of test equipment placed in the test bench and on the turbine engine, and being configured to prevent from performing the test of the turbine engine if an anomaly of the first type is detected by the augmented-reality system. ### Claim 19 (depends on 18) A test bench according to claim 18, further comprising: at least 100 sensors; at least 1,000 sensors; or at least 10,000 sensors.