EP3732471A1 - Procédé et dispositif de contrôle non destructif d'une paroi - Google Patents
Procédé et dispositif de contrôle non destructif d'une paroiInfo
- Publication number
- EP3732471A1 EP3732471A1 EP18842434.5A EP18842434A EP3732471A1 EP 3732471 A1 EP3732471 A1 EP 3732471A1 EP 18842434 A EP18842434 A EP 18842434A EP 3732471 A1 EP3732471 A1 EP 3732471A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- medium
- thermal
- thermal radiation
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
Definitions
- the present invention relates to a method and a device for non-destructive control of a partition wall between a first medium and a second medium, by thermal analysis, in particular with a view to locating thermal bridges and thermal singularities of the wall.
- the invention can be applied for non-destructive testing of any type of partition wall between two environments, including a wall of a building, a wall of a vehicle, a wall of an oven, a wall of a refrigerator , a wall of a tank.
- the invention can be applied for the non-destructive control of a wall belonging to the envelope of a room, such as a wall, a floor, a roof, which can be equipped with doors or windows, the wall then being a partition wall between the inside and the outside of the room.
- any space of habitat or storage may be a residential space or fixed storage, such as a house or a building, especially for residential or tertiary use warehouse type, factory, etc., or a part such a building, for example an apartment in a building with several floors, or such as a machine, especially in the field of household appliances, an oven, a refrigerator, etc.
- a housing or transportable storage space such as a train wagon, a car cabin, a truck cabin or a storage space in a truck, a cabin of a ship or a storage space in a ship, an aircraft cabin or storage space in an airplane.
- the invention finds a particularly interesting application for the diagnosis of multilayer walls with high thermal resistance which are used, in the context of the construction of new buildings or renovation, to reduce heat loss in buildings.
- the presence of thermal bridges tends to greatly reduce the performance of such walls. It is important to be able to detect insulation faults due for example to installation defects, structural irregularities, settlements of insulating material, etc.
- infrared thermography is a technique adapted to this type of inspection, because of its non-destructive nature.
- the NF EN 13187 standard describes a qualitative method for detecting thermal irregularities in the building envelope by infrared thermography. It is more precisely to locate the thermal irregularities, to locate the infiltrations of air through the enclosure of the building, to locate the areas of high humidity.
- thermographic inspection is passive and cyclical (or punctual), with dependence on the conditions of use of the building and external climatic conditions.
- the implementation of this method requires to be placed in very specific conditions.
- the NF EN 13187 standard indicates that the temperature difference between the inside and outside must be sufficiently large, in particular greater than about 10 ° C, to detect thermal irregularities.
- the examination must be performed in static (or stationary) mode, with little variation of outside and inside temperature in order to avoid a dynamic (or non-stationary) regime.
- a difficulty is then to determine whether the envelope is in the course of time evolution, because of the meteorological conditions and / or the inertia of the structures and / or uses of the building.
- the invention intends to remedy more particularly by proposing a method and a device for non-destructive wall control which can be implemented simply and rapidly, free from dependency on weather conditions and the inertia of structures.
- the subject of the invention is a method of non-destructive inspection of a partition wall between a first medium and a second medium, in particular between the inside and the outside of a room, characterized in that it includes steps in which:
- a temporal modulation of an air heating power is carried out in the first medium capable of thermally biasing the wall;
- a result of analysis of the wall is generated from the evolution of the intensity detected.
- heating power of the air in the first medium any operating condition generating a variation of the air temperature in the first medium, for temperature conditions given in the second middle. It is understood that the heating power can be, over time, positive, zero or negative.
- a positive heating power corresponds to a heat input into the first medium, which can be obtained by means of a heater.
- a negative heating power corresponds to a supply of cold in the first medium, which can be obtained using an air conditioning unit.
- the terms “heating” or “heating” may designate as much a supply of heat as a contribution of cold.
- the thermal radiation released by the wall is generally infrared radiation, in particular for the analysis of walls at room temperature, but depending on the temperature of the wall tested, it can be used.
- act of a radiation comprising wavelengths outside the wavelength range of the infrared, for example wavelengths in the visible range, the ultraviolet range, or in the corresponding domain at terahertz frequencies.
- the invention proposes an active thermography method, combining the application of a temporal modulation of a heating power of the air in the first medium suitable for soliciting the wall and the detection of a heat radiation released by the wall during the modulation of the heating power, which makes it possible to detect thermal irregularities of the wall regardless of the initial state of the wall and the climatic conditions.
- the heating of the air in the first medium makes it possible to solicit the wall in a global manner, so that an overall diagnosis of the wall can be made. Thanks to the invention, it is possible to detect spatial variations in the insulation of the wall, and in particular thermal bridges, which may be structural, related to an interruption or degradation of the insulation within the wall (PTI, or integrated thermal bridges) or related to an interruption of the insulation at an intersection of wall elements (PTL, or thermal link bridges), repetitive or non-repetitive.
- thermal bridges which may be structural, related to an interruption or degradation of the insulation within the wall (PTI, or integrated thermal bridges) or related to an interruption of the insulation at an intersection of wall elements (PTL, or thermal link bridges), repetitive or non-repetitive.
- the invention can advantageously involve a global thermal load of the envelope of a room, that is to say a solicitation of all the walls of the room, via the heating of the air inside the room .
- the thermal load can be applied to the walls of the outer shell of the building and / or internal walls such as party walls.
- the principle underlying the invention is to use the temporal variations in the intensity of the thermal radiation released by the wall, when the wall is subjected in its entirety to a controlled thermal stress resulting from heating the air. in the first middle. It is noted that, in the context of the invention, it is not necessary to have a uniform heating of the wall, via the heating of the air of the first medium, even if this is preferable.
- the invention makes it possible to generate a result of analysis of the wall over a short period, with duration tests that can in particular extend from a few tens of minutes to a few hours, limiting the influence of the parameters likely to modify the dynamic behavior of the wall.
- the shortness of the measurements makes it possible to overcome the influence of the conditions of use of the local and the variations of the external climatic conditions.
- the temporal evolution of the intensity of the thermal radiation released by the wall is detected on the side of the first medium, that is to say on the middle side where the modulation of the heating power of the air.
- the temporal modulation of the heating power of the air in the first medium is produced from a deterministic signal, such as a square-wave, ramp, triangular, sinusoidal or Dirac pulse signal, or more generally a signal involving a monotonous function increasing then decreasing or vice versa.
- a deterministic signal such as a square-wave, ramp, triangular, sinusoidal or Dirac pulse signal, or more generally a signal involving a monotonous function increasing then decreasing or vice versa.
- the temporal modulation of the heating power of the air in the first medium is produced from a random signal, such as a Gaussian random signal, PRBS (pseudo random binary sequence), or SWEEP (sinusoidal variable frequency).
- a random signal such as a Gaussian random signal, PRBS (pseudo random binary sequence), or SWEEP (sinusoidal variable frequency).
- the temporal modulation of the heating power of the air in the first medium comprises the application of at least two distinct heating powers over two successive periods of time.
- the temporal modulation of the heating power of the air in the first medium comprises the application of a first strictly positive heating power, so as to reach an air temperature in the first medium strictly greater than the air temperature in the second medium, followed by the application of a second heating power substantially zero, so as to obtain a free cooling of the first medium.
- the temporal modulation of the heating power of the air in the first medium is applied by means of at least one heater having a controlled power source.
- the heater or heaters are not very inert so as to ensure rapid heating of the air in the first medium.
- At least one heating device with a controlled power source for heating the first medium may be a fixed equipment of the first medium, that is to say a heater installed in the first medium independently of the implementation of the method . It can in particular be a heat pump.
- At least one controlled power source heating apparatus for heating the first medium may be an apparatus reported in the first medium specifically for carrying out the method.
- the heating of the first medium can be implemented by means of a combination of at least one heating device which equips the first medium in a fixed manner, independently of the implementation of the method, and at least one heater reported in the first medium specifically for carrying out the method.
- the heaters of the first medium can be of convective, radiative or conductive type, or combine several of these technologies. This may include, in particular, electrical appliances such as electric convectors; carpets or heating films; Radiant parasols.
- the solar radiation is low, preferably zero.
- the solar radiation is freed from the influence of uncontrolled variations of solar radiation on the heating of the wall.
- the temporal evolution of the intensity of thermal radiation released by the wall is detected by means of at least one a thermal radiation detector disposed facing the wall.
- the thermal radiation detector is arranged opposite the wall on the side of the first medium, that is to say on the middle side where the modulation of the heating power of the heater has been applied. 'air.
- thermal radiation detectors examples include, but are not limited to: spot metering sensors, such as a pyrometer or thermopile; imagers, such as a thermal camera. They may be monochromatic or multi-spectral detectors, or scanning detectors. In terms of detected radiation, it may be, without limitation, detectors of infrared radiation, visible light, ultraviolet radiation, terahertz waves.
- a wall analysis result is generated from the observation of a temporal or frequency thermographic sequence of the wall, corresponding to the evolution of the detected thermal radiation intensity.
- the observed thermographic sequence can be the raw sequence of the evolution of the detected thermal radiation intensity, or a sequence obtained after application of one or more post-treatments to the evolution of the radiation intensity. thermal detected.
- the principle of post-processing is to submit a thermogram to a series of treatments and mathematical operations to improve the detection of a certain type of information, for example the thermal signature of an irregularity of the wall.
- Post-treatments that can be applied to the evolution of the detected thermal radiation intensity are listed below, by way of non-limiting examples. Of course, these post treatments can be applied individually or in any technically feasible combination.
- a simple filter to implement is to integrate between two time limits the thermosignal for each pixel, so as to increase the signal-to-noise ratio.
- a spatial convolution filter so as to increase the signal-to-noise ratio in the images.
- ⁇ may be post-treatments using processing methods.
- integral transformations include the Fourier transform, the Laplace transform, the convolution.
- FFT fast Fourier transform
- PPT pulsed phase thermography or pulsed phase thermography
- PCT principal component thermography, or principal component analysis
- SVD singular value decomposition, or singular value decomposition
- TSR thermoography signal reconstruction, or thermographic signal reconstruction
- FIOS higher order statistics, or higher order statistics
- PLS partial least squares, or least partial squares
- parametric adjustment post-treatments with a parametric identification model based on different methods, such as for example: modal methods; the proper orthogonal decomposition (proper orthogonal decomposition, or POD); the general decomposition proper (proper general decomposition, or PGD); "gray box” type models (ARX, ARMAX, ARMA models for example).
- modal methods such as for example: modal methods; the proper orthogonal decomposition (proper orthogonal decomposition, or POD); the general decomposition proper (proper general decomposition, or PGD); "gray box” type models (ARX, ARMAX, ARMA models for example).
- segmentation can also be post-processing segmentation, aiming to gather pixels together according to predefined criteria.
- the pixels are thus grouped into regions, which constitute a tiling or partition of the image. This may allow, for example, to separate elements from a background.
- segmentation methods include, but are not limited to: region-based segmentation, such as region-growing, split-and-merge; edge-based segmentation; segmentation based on classification or thresholding of pixels based their intensity (classification or thresholding); segmentation based on transformation techniques (transformed Hough for example).
- SVD single value decomposition
- the principle of the SVD is to change from a data volume (film) to a two-dimensional matrix A of size M x N, where the number of lines M corresponds to the number of pixels (X, Y) and the number of pixels. columns N is the number of frames.
- the spatial information is then obtained by traversing the matrix along its lines, while the temporal information is obtained by traversing the matrix according to its columns.
- the columns of U contain the Orthogonal Func- tional Modes (EOF), which represent the spatial variations of the data.
- the lines of V T contain the principal components (PC, or "Principal Components”) which represent the temporal variations of the data.
- the singular value decomposition thus makes it possible to present the matrix A, which depends on spatio-temporal coordinates, in a matrix product dissociating time and space.
- the first EOF represents the most significant spatial signal variations. It is possible, by selecting certain EOF, to eliminate the detrimental contributions to detection such as heating uniformity problems or reflection problems.
- the distant EOFs corresponding to the smallest singular values, represent the noise and can also be eliminated.
- an SVD after-treatment has the double advantage of filtering the parasitic noise, which avoids having to apply an additional post-processing dedicated to filtering, and to improve the thermal images in terms of detection.
- This last advantage is particularly important in the context of the invention, which aims to diagnose walls in real contexts, and not in the laboratory.
- an SVD postprocessing makes it possible to locate thermal irregularities in a wide variety of experimental configurations, including in imperfect configurations, with, for example, inhomogeneities of wall heating or reflection problems.
- a wall analysis result can be generated directly from the digital levels recorded by the thermal radiation detector, without determining the corrected temperature levels (or "true” temperatures) of the wall taking into account in particular the emissivity.
- a wall analysis result can be generated directly from the observation of a thermographic sequence in digital levels, be it the raw sequence in digital levels provided by the detector. thermal radiation, or a sequence obtained after applying one or more post treatments to the raw sequence in digital levels. Indeed, it has been found experimentally that the detection of thermal irregularities, which is done in relative levels, is carried out both from the thermographic sequence in numerical levels and from the thermographic sequence in corrected temperature levels. (or "true” temperatures).
- this variant requires, in order to access the corrected temperatures, to know the temperature of the environment, the ambient air temperature, the relative humidity, the distance to the wall observed, the emissivity of the wall and potentially, in case of zones of the wall having different emissivities, the emissivity of each zone.
- a wall analysis result can be generated by applying, to the evolution of the detected thermal radiation intensity, a differentiated post-treatment for different regions of interest of the wall.
- the analysis of different regions of interest makes it possible, for example, to study walls having different compositions, which may have different types of irregularities and / or defects.
- the analysis by region of interest also makes it possible to remove areas liable to interfere with the analysis, resulting, for example, from experimental problems during the test of the wall, such as a light left inadvertently lit, the presence of electrical wires etc.
- At least a portion of the steps of the control method are determined by computer program instructions.
- the invention also relates to a computer program on a recording medium, this program being capable of to be implemented in a terminal, or more generally in a computer, this program comprising instructions adapted to the execution of all or part of the steps of a control method as described above.
- This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form.
- the invention also relates to a computer readable recording medium, and comprising instructions of a computer program as mentioned above.
- the recording medium may be any entity or device capable of storing the program.
- the medium may comprise storage means, such as a read-only memory, a non-volatile rewritable memory, for example a USB key, an SD card, an EEPROM, or a magnetic recording means, for example a Hard disk.
- the recording medium may also be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method.
- the recording medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
- the program according to the invention may in particular be downloaded to a computer network.
- Another object of the invention is a non-destructive control device for a separation wall between a first medium and a second medium, this control device comprising:
- At least one heating device having a controlled power source, configured to apply a temporal modulation of an air heating power in the first medium capable of thermally biasing the wall;
- At least one thermal radiation detector configured to detect the temporal evolution of the intensity of a thermal radiation released by the wall
- a computer data processing management unit comprising a calculation module configured to generate, from data representative of the temporal evolution of the intensity of thermal radiation detected by the thermal radiation detector, data representative of a result of analysis of the wall.
- the management unit comprises a module for controlling the power source of the or each heating appliance according to data representative of the temporal modulation of the heating power of the air to be applied in the first medium.
- FIG. 1 is a schematic perspective view of a bungalow which one wishes to control the envelope to locate possible thermal bridges and thermal singularities;
- FIG. 2 is a schematic top view of the interior of the bungalow where a control device according to the invention is installed, notably comprising an infrared thermal camera, for implementing a control of two walls of the bungalow, one of which has a glazing unit;
- FIG. 3 is a schematic cross section showing the structure of the walls of the bungalow, where each wall is a multilayer wall with high thermal resistance;
- FIG. 4 is an image of the walls of the bungalow obtained with the infrared thermal camera of Figure 2 by performing an infrared thermography test according to standard NF EN 13187;
- FIGS. 5 to 7 are the first three orthogonal statistical modes (EOF, or "Empirical Orthogonal Functions”) obtained by applying a SVD (singular value decomposition) post-processing to a thermographic sequence obtained with the infrared thermal camera of FIG. 2, performing an active infrared thermography test according to the method of the invention;
- FIG. 8 is a graph showing the main components (PC, or "Principal Components”) resulting from the singular value decomposition of the thermographic sequence corresponding to the first three orthogonal statistical modes of FIGS. 5 to 7.
- the method according to the invention is implemented for non-destructive testing of two walls 1 1, 13 belonging to the envelope of a bungalow 10, which are oriented respectively to the west and north.
- the wall 1 1 facing west is provided with a glazing 12 which is a triple glazing.
- the walls of the bungalow 10 are formed from insulating sandwich panels 6 having a 35 mm thick polyurethane layer inserted between two metal plates.
- Each wall of the bungalow is also provided with a multilayer system of insulation from the inside (ITI), positioned using wooden battens 2, which comprises successively from the sandwich panel 6:
- a 20 mm thick layer 5 comprising a paving of vacuum insulation panels (VIP or "Vacuum Insulation Panels") of standard size, and expanded polystyrene (EPS or "Expanded Polystyrene”) panels to fill the spaces; remaining between the VIP panels;
- VIP vacuum insulation panels
- EPS expanded polystyrene
- EPS expanded polystyrene panels
- the overall thermal resistance of the walls of the bungalow is 5.3 m 2 .KW 1 .
- the walls 1 1, 13 of the bungalow Due to their multilayer structure, the walls 1 1, 13 of the bungalow have a number of thermal irregularities, in particular due to the partial layout of the VIP panels, to the junctions between the different insulating materials (EPS and VIP), to the presence of wooden battens.
- the comparative example and the example according to the invention described below illustrate the contribution of the invention to identify and locate these thermal singularities of the walls of the bungalow.
- the infrared thermal imaging camera used is a cooled long wavelength camera equipped with a Mercury Cadmium Telluride (MCT) detector for a matrix spatial resolution of 320 x 256 pixels and a sensitivity (NETD, or Noise Equivalent Temperature Difference) of less than 25 mK at room temperature (FLIR SC7300L model).
- MCT Mercury Cadmium Telluride
- NETD Noise Equivalent Temperature Difference
- Figure 4 shows a mapping of the digital levels of the infrared thermal camera of the walls of the bungalow 10.
- the gray scale represents the scale of the digital levels.
- thermal bridges of different types corresponding to irregularities of a structural nature, such as the floor-floor, glazed-wall, wall-wall, and so on.
- FIG. 2 The control method according to the invention is implemented using the device shown in FIG. 2, which comprises:
- an infrared thermal camera 14 identical to that described previously in the comparative example, positioned inside (I) of the bungalow 10 opposite the two walls 11 and 13; a plurality of electric convectors 18 of nominal power 250 W, positioned near the center of the bungalow 10 for heating the air inside (I) of the bungalow;
- a computer data processing management unit 19 which is for example a portable PC type computer and which integrates a calculation module configured to generate, from data representative of the temporal evolution of the thermal radiation intensity infrared detected by the infrared thermal camera 14, data representative of a result of analysis of each wall 1 1, 13.
- the computer 19 comprises a software application comprising instructions, intended to be executed by the computer 19, for the implementation of all or part of the calculation steps of the method, including post-processing steps.
- the computer 19 also comprises a control module of the electric convectors 18 for heating according to data representative of the temporal modulation of the heating power of the air to be applied inside (I) of the bungalow 10 .
- a time modulation of the heating power of the air inside (I) of the bungalow 10 is carried out with the aid of the electric convectors 18, making it possible to heat the walls 1 1, 13 .
- the temporal modulation of the heating power of the air inside (I) of the bungalow 10 comprises:
- the temporal evolution of the intensity of the infrared heat radiation emitted by the walls of the bungalow is measured using the infrared thermal imaging camera. 14.
- An analysis result of the walls of the bungalow 10 is then generated from the change in the infrared radiation intensity detected by the infrared thermal camera 14, by applying SVD (singular value decomposition) post-processing directly to the thermographic sequence in digital levels recorded by the infrared thermal camera 14, globally for the entire area of the envelope of the bungalow located in the field of view of the camera 14.
- SVD singular value decomposition
- FIGS. 5 to 8 show the first three orthogonal statistical modes (EOF) and the principal components (PC) resulting from the singular value decomposition of the thermal sequence obtained with the infrared thermal camera 14.
- the first three orthogonal statistical modes contain most of the information contained in the thermographic sequence.
- the other orthogonal statistical modes correspond to noise.
- the EOFI visible in FIG. 5, corresponds to an "average” image (or “baseline”).
- baseline We observe the various thermal irregularities of structural order already identified during the point observation carried out according to the standard NF EN 13187. The contrast is however better and makes it possible to visualize the paving of panels VI P of the layer 5.
- the method of the invention proposes to achieve a global thermal load of at least one wall of a room, resulting from a heating of the air in the room, and to generate a result. overall analysis of the wall from the temporal evolution of the intensity of thermal radiation released by the wall in response to this thermal stress.
- control method according to the invention can be implemented throughout the year, including outside the winter period, contrary to the method of standard NF EN 13187.
- the detection of the thermal irregularities of the wall is made more efficient by the application of one or more post-treatments to the thermographic sequence corresponding to the measured evolution of the intensity. thermal radiation released by the wall.
- a particularly favorable post-treatment in the context of the invention is the treatment of SVD, which makes it possible to select zones of interest of the images of the detected thermographic sequence, without having prior information on the structure of the wall.
- SVD can both filter out unwanted noise, which increases the signal-to-noise ratio and avoids having to apply another filtering postprocessing, and improves the detection of thermal irregularities, by compressing the data of measurement, thus making it possible to locate thermal irregularities even under imperfect test conditions, for example in the presence of inhomogeneities of heating of the wall or reflection phenomena.
- This last aspect is particularly important for the in situ diagnosis of thermal irregularities in building walls, where the diagnosis is made on site, with an imposed configuration (orientation of the walls for example) and potential disturbances (climatic variations for example) , which is different from diagnoses made in controlled environments, such as in the laboratory.
- the compression of the data resulting from the processing of SVD makes it possible to reduce the volume of data to be stored.
- the principal components (PC) resulting from the singular value decomposition can also be useful for accessing additional information, for example to differentiate between different types of thermal irregularities or to have access to their position at depth in the walls.
- the example above illustrates the case of a thermal stressing of the walls of a room resulting from an air heating inside the room in two phases of slot type, including the application of a first positive positive heating power followed by the application of a second substantially zero heating power.
- the thermal stressing of the wall may result from any temporal modulation of the heating power of the air in the first medium, and notably from a different modulation of a two-power slot. separate heating.
- the temporal modulation of the heating power of the air in the first medium can be produced from a random signal close to a white noise, which has the advantage of soliciting the wall according to a plurality of excitation modes and can detect a greater variety of thermal irregularities.
- the analysis of the wall was carried out on the basis of the observation of a thermographic sequence in digital levels, obtained by applying an SVD post-processing directly to the sequence in levels. recorded by the infrared thermal camera, without determining the corrected temperature levels (or "true" temperatures) of the walls of the room.
- a wall analysis result from corrected temperature levels of the walls, determined for example by using thermocouples positioned during the test on the two walls studied and on a correction plate positioned in the corner of the two walls, the correction plate comprising a mirror zone and a high emissivity zone for accessing the environmental temperature and the apparent temperature as is known in the field of thermography.
- the SVD postprocessing was applied globally for the entire area of the bungalow envelope located in the field of view of the infrared thermal camera.
- the SVD after-treatment could have been applied in a differentiated manner, for example on the one hand for the west-facing wall, and on the other hand for the north-facing wall, which are two regions of interest of the envelope of the bungalow subject to different environmental conditions, or in a differentiated manner to remove areas likely to hinder the analysis, such as areas of passage of electrical son, etc..
- the previous example illustrates the implementation of the invention for the control of walls of a bungalow but, more generally, the invention is of course applicable to any type of wall.
- the invention in particular, in the field of building, the invention is applicable to walls, floors, ceilings, crawling roofs, etc.
- the invention is applicable not only to the walls of the outer envelope of the building, but also to the inner walls such as party walls.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1763377A FR3076353A1 (fr) | 2017-12-29 | 2017-12-29 | Procede et dispositif de controle non destructif d'une paroi |
PCT/FR2018/053449 WO2019129959A1 (fr) | 2017-12-29 | 2018-12-20 | Procédé et dispositif de contrôle non destructif d'une paroi |
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EP3732471A1 true EP3732471A1 (fr) | 2020-11-04 |
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EP18842434.5A Pending EP3732471A1 (fr) | 2017-12-29 | 2018-12-20 | Procédé et dispositif de contrôle non destructif d'une paroi |
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EP (1) | EP3732471A1 (fr) |
FR (1) | FR3076353A1 (fr) |
WO (1) | WO2019129959A1 (fr) |
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US11403749B2 (en) | 2019-08-09 | 2022-08-02 | Certainteed Llc | Method of identifying insulation voids and insulation void detection tool |
CN114858285A (zh) * | 2022-04-02 | 2022-08-05 | 电子科技大学 | 一种线性调频红外无损检测*** |
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FR2663745B1 (fr) * | 1990-06-21 | 1992-10-09 | Reims Chamapgne Ardenne Univer | Dispositif d'analyse photothermique de materiaux minces. |
CN102759543B (zh) * | 2012-06-26 | 2014-09-24 | 中国建筑科学研究院 | 一种适用于夏热冬暖地区的建筑墙体表观传热系数现场检测方法 |
DE102012215117B4 (de) * | 2012-08-24 | 2015-07-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Thermographie-auswertevorrichtung und thermographie-prüfsystem zur prüfung von elektro-chemischen zellenanordnungen |
FR3032529B1 (fr) * | 2015-02-06 | 2019-06-07 | Saint-Gobain Isover | Determination de la resistance thermique d'une paroi |
JP2017125754A (ja) * | 2016-01-13 | 2017-07-20 | 出光興産株式会社 | 処理対象の熱伝達率算出方法、及びこれを用いた処理対象の熱処理方法 |
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2017
- 2017-12-29 FR FR1763377A patent/FR3076353A1/fr active Pending
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2018
- 2018-12-20 EP EP18842434.5A patent/EP3732471A1/fr active Pending
- 2018-12-20 WO PCT/FR2018/053449 patent/WO2019129959A1/fr unknown
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WO2019129959A1 (fr) | 2019-07-04 |
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