WO2014170443A1 - Method for recording and inspecting the surface condition of a mechanical structure - Google Patents
Method for recording and inspecting the surface condition of a mechanical structure Download PDFInfo
- Publication number
- WO2014170443A1 WO2014170443A1 PCT/EP2014/057917 EP2014057917W WO2014170443A1 WO 2014170443 A1 WO2014170443 A1 WO 2014170443A1 EP 2014057917 W EP2014057917 W EP 2014057917W WO 2014170443 A1 WO2014170443 A1 WO 2014170443A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- recording
- sensor
- photographs
- sub
- photographic
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/9515—Objects of complex shape, e.g. examined with use of a surface follower device
Definitions
- the present invention belongs to the field of structural inspection (including but not limited to wind turbine blades, bridge piles or decks, dams, concrete enclosures and foundations, industrial chimneys). It relates in particular to a method of recording and systematic inspection of the surface state of a structure, possibly associated with a method of detecting anomalies on the surface (cracks, impacts, etc.).
- the invention relates to a method for recording and inspecting the surface condition of a mechanical structure, the method using a photographic sensor that is automatically moved to record multiple shots of the surface of a mechanical structure.
- the method of recording and inspecting the surface state preferably comprises:
- a step 100 of taking several photographs comprising the repetition several times of three sub-steps:
- step 100 is preceded by a step 50 of defining the successive positions in which the sensor must be at the time of step 120 of triggering the recording of the sensor.
- step 100 all or two of the substeps 1 10, 120 and 130 of step 100 are performed simultaneously.
- the step 230 is preceded by a step 220 of projection and deformation of the photographs to compensate for the non-planar displacement of the photographic sensor and allow the photographs to be connected without discontinuities.
- step 230 and step 208 are preceded by a step 210 of processing photographs.
- This step includes one or more of these photographic processes: digital developments, optical distortion correction, noise reduction, vignetting reduction, chromatic aberration correction.
- the step 230 of positioning photographs relative to each other is performed automatically by a computer.
- this positioning is performed in part or in full on a computer by a human operator.
- step 240 may be followed by a step 250 of inspection of the plates allowing the detection of cracks, cracks, tasks and suspicions of signs of aging or damage of the inspected structure.
- This step is carried out preferentially by automated processing of snapshots and automatic detection. In another embodiment, this inspection is carried out partially or entirely by a human operator.
- step 300 allows the repetition of all the steps at regular intervals.
- the past recordings of the surface condition are compared to the new surface state of the structure to observe the evolution and aging of the structure.
- FIG. 1 is a flowchart of the steps of an exemplary implementation of the method according to the invention
- FIG. 2 is a diagram of the device for moving the sensor.
- the method is implemented using a photographic sensor or digital camera. Such a sensor or apparatus is known per se and is therefore not detailed further here. Alternatively, the method uses an infrared sensor, an ultraviolet sensor or a sensor of any other wavelength range of light, polarized or otherwise.
- the sensor is attached to a motorized device that moves the sensor.
- FIG. 2 shows a sensor displacement device allowing the displacement of the sensor along two perpendicular axes of rotation, ie the modification of two degrees of freedom of the sensor, two rotations. In other implementations of the method, between one and six degrees of freedom of the sensor can be modified by the displacement device (at most, three translations and three rotations).
- step 50 The successive positions in which the sensor must be at the time of triggering the recording (step 120) are defined. In a preferred implementation, these are automatically defined by a computing device. In the present example, which is in no way limitative, the computing device is of the PC microcomputer type. In the present non-limiting example, the positions are defined by interaction with the operator that specifies a number of positions to be taken and a recovery rate between two successive records. Depending on the solid angle recorded by the sensor, the recovery rate between two successive recordings chosen by the operator and the different positions to be taken by the sensor, all the positions that must be taken by the sensor are calculated automatically.
- step 100 The taking of several recordings is done by a repetition of the following steps.
- step 110 The displacement device positions the sensor in the position calculated during step 50.
- step 120 Recording by the sensor is triggered.
- step 130 The data recorded by the sensor is transmitted to a data storage device.
- the data storage device is of the PC microcomputer type or of the internal memory type of the camera.
- Steps 100, 120 and 130 are repeated as many times as necessary for the sensor to be triggered in all the positions defined in step 50.
- steps 1 10, 120 and 130 can be realized totally or partially at the same time.
- the step 130 for transmitting the data recorded at the position N-1 can be carried out at the same time as the step 1 of moving and positioning the sensor in the position N.
- step 210 The recorded data is processed by algorithms to improve the quality of the recordings.
- these treatments include the digital development of the photographs or data from the raw data of the sensor, the correction of the optical deformations, the reduction of the noise, the reduction of the vignetting, the correction of the chromatic aberrations.
- this step is performed by a microcomputer-type computing device PC.
- Step 220 The recorded data is processed by algorithms to compensate for displacements outside the plane of the sensor. In a preferred implementation, the positions adopted by the sensor calculated in step 50 and taken by the sensor during step 100 have been recorded and saved.
- step 230 This step allows the relative positioning of the successive recordings of the sensor during step 100.
- the positions adopted by the sensor calculated in step 50 and taken by the sensor during step 100 have been recorded and saved.
- These angles and positions during each recording make it possible to deduce a relative positioning of the recorded data between two successive recordings.
- the relative positioning of the records is automatically optimized by minimizing or maximizing a measurement of distance or correlation 2 between the two successive recordings on their area of overlap. In a bet less advantageous, the optimization of the positioning of the data can be carried out by a human operator.
- step 240 The multiple recordings are integrated in a data visualization interface.
- this visualization interface these successive recordings are positioned relative to one another by virtue of the relative positioning of the recordings obtained during step 230.
- This viewing interface makes it possible to display and move throughout the recorded data concerning the surface condition of the inspected structure
- this step is carried out by a display interface of PC-type with screen and the displacement on the surface inspected by a conventional PC microcomputer interaction device such as a keyboard, mouse or joystick.
- step 250 The multiple data records are inspected for abnormalities.
- these abnormalities are cracks, impacts, erosion, corrosion, swelling, staining and delamination.
- the detection of these abnormalities is carried out by a human operator. It can indicate areas and classify or annotate abnormalities.
- algorithms preselect areas in which abnormalities are suspected and the human operator validates or invalidates the presence of abnormalities.
- the abnormalities are automatically detected by algorithm.
- step 300 The preceding steps are repeated several times throughout the life of the structure. The surface conditions thus recorded as the aging of the structure over time are compared and the effect of aging is thus obtained.
- This process allows, from the move and the recording coordinated with a photographic sensor, to obtain the recording of the surface state of a structure and then to go through it to identify and identify abnormalities such as impacts, cracks, swellings, etc.
- the recording of this surface state several times in time makes it possible to follow and observe the evolution and the aging of the structure.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1353489 | 2013-04-17 | ||
FR1353489A FR3004802B3 (en) | 2013-04-17 | 2013-04-17 | METHOD FOR RECORDING AND INSPECTING THE SURFACE CONDITION OF A MECHANICAL STRUCTURE |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014170443A1 true WO2014170443A1 (en) | 2014-10-23 |
Family
ID=50543582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/057917 WO2014170443A1 (en) | 2013-04-17 | 2014-04-17 | Method for recording and inspecting the surface condition of a mechanical structure |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR3004802B3 (en) |
WO (1) | WO2014170443A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK201570888A1 (en) * | 2015-04-27 | 2016-11-07 | Envision Energy (Jiangsu) Co Ltd | Method for operating a wind turbine based on degradation of wind turbine blade |
US10184450B2 (en) | 2015-04-27 | 2019-01-22 | Envision Energy (Jiangsu) Co., Ltd. | Method for operating a wind turbine based on degradation of wind turbine blade |
CN111964635A (en) * | 2020-08-28 | 2020-11-20 | 哈尔滨工业大学 | Method for testing surface roughness of concrete matrix restoration |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997008652A2 (en) * | 1995-08-15 | 1997-03-06 | Diffracto, Ltd. | System and method for graphical image data acquisition, storage, and retrieval |
EP1813934A1 (en) * | 2004-11-02 | 2007-08-01 | Hara, Tooru | Concrete structure crack inspection device and crack inspection method |
DE102011017564A1 (en) * | 2011-04-26 | 2012-10-31 | Aerospy Sense & Avoid Technology Gmbh | Method and system for inspecting a surface for material defects |
WO2012152561A1 (en) * | 2011-05-11 | 2012-11-15 | Wobben Properties Gmbh | Assessment of rotor blades |
US20120320148A1 (en) * | 2011-06-20 | 2012-12-20 | Howard Unger | Motorized camera with automated panoramic image capture sequences |
-
2013
- 2013-04-17 FR FR1353489A patent/FR3004802B3/en not_active Expired - Lifetime
-
2014
- 2014-04-17 WO PCT/EP2014/057917 patent/WO2014170443A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997008652A2 (en) * | 1995-08-15 | 1997-03-06 | Diffracto, Ltd. | System and method for graphical image data acquisition, storage, and retrieval |
EP1813934A1 (en) * | 2004-11-02 | 2007-08-01 | Hara, Tooru | Concrete structure crack inspection device and crack inspection method |
DE102011017564A1 (en) * | 2011-04-26 | 2012-10-31 | Aerospy Sense & Avoid Technology Gmbh | Method and system for inspecting a surface for material defects |
WO2012152561A1 (en) * | 2011-05-11 | 2012-11-15 | Wobben Properties Gmbh | Assessment of rotor blades |
US20120320148A1 (en) * | 2011-06-20 | 2012-12-20 | Howard Unger | Motorized camera with automated panoramic image capture sequences |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK201570888A1 (en) * | 2015-04-27 | 2016-11-07 | Envision Energy (Jiangsu) Co Ltd | Method for operating a wind turbine based on degradation of wind turbine blade |
DK178737B1 (en) * | 2015-04-27 | 2016-12-12 | Envision Energy (Jiangsu) Co Ltd | Method for operating a wind turbine based on degradation of wind turbine blade |
US10184450B2 (en) | 2015-04-27 | 2019-01-22 | Envision Energy (Jiangsu) Co., Ltd. | Method for operating a wind turbine based on degradation of wind turbine blade |
CN111964635A (en) * | 2020-08-28 | 2020-11-20 | 哈尔滨工业大学 | Method for testing surface roughness of concrete matrix restoration |
CN111964635B (en) * | 2020-08-28 | 2023-10-24 | 哈尔滨工业大学 | Method for testing surface roughness of concrete matrix repair |
Also Published As
Publication number | Publication date |
---|---|
FR3004802A3 (en) | 2014-10-24 |
FR3004802B3 (en) | 2017-02-24 |
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