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    • 专利摘要:
    The present invention relates to the field of air quality control. More specifically, the invention relates to a system for identifying the presence of gaseous chemical pollutants, preferably volatile organic compounds, in a closed environment, said system comprising: a support (1) not emitting a gaseous chemical pollutant ; a gaseous chemical pollutant sensor (2); at least one colorimetric marker (5A, 5B, 5C, 5D, 5E); - a mobile application or an electronic chip; an optical recording means, said optical recording means being connected to the mobile application or to the electronic chip; - at least one database; said at least one database being connected to the mobile application or the electronic chip; and - at least one display or transmission means connected to the mobile application or to the electronic chip.
    公开号:FR3050270A1
    申请号:FR1653336
    申请日:2016-04-15
    公开日:2017-10-20
    发明作者:Sylvain Colomb；Farhad Abedini；Severine Margeridon-Thermet
    申请人:Ethera SA；
    IPC主号:
    专利说明:

    SYSTEM FOR CONTROLLING AIR QUALITY IN A CLOSED ENVIRONMENT
    FIELD OF THE INVENTION
    The present invention relates to the field of air quality control. More specifically, the invention is concerned with the identification of the presence of gaseous chemical pollutants such as volatile organic compounds, in a closed environment, and the determination of their concentration.
    STATE OF THE ART
    Volatile organic compounds are in gaseous form in the atmosphere. They constitute a very broad family of products and include, for example, benzene, acetone, perchlorethylene, or even aldehydes. The volatility of these products gives them the ability to spread more or less far from their place of emission, thus resulting in direct and indirect impacts on their environment.
    In particular, aldehydes such as formaldehyde are among the most abundant household chemical pollutants. Their sources are extremely numerous. The main sources of aldehyde emissions are found in homes and are very diverse: resins and glues used to manufacture agglomerated wood, particle board and plywood; urea-formaldehyde insulating foams used as thermal insulation in walls and partitions; textile coatings, wallpapers, paints, leathers ... Given the harmful effects of such chemical pollutants on public health, it seems necessary to diagnose the ambient air of residential buildings, and to evaluate their harmfulness. There are already several well-known methods for determining the saturation state of a formaldehyde part: 1. liquid chromatographic methods, 2. colorimetric indicator tubes, 3. electrochemical cells, 4. colorimetric methods associated with optical drives.
    Liquid chromatographic methods require a laboratory analysis step and complex equipment. As a result, they are long and expensive.
    Colorimetric indicator tubes are unsuitable for domestic use: they have a detection threshold that is too high for applications in a closed environment such as a room.
    Electrochemical cells are also not very selective and therefore not very adapted: they have a detection threshold higher than the limit value of exposure, considered polluting, in the houses.
    The colorimetric methods involve, after color change of a sensor, a measurement by a laser analyzer or spectrophotometer. These techniques can be expensive and impractical to use.
    Thus, the methods of the prior art are either not suited to measurements in a closed environment, or require a long and expensive equipment or protocol. The user seeking reliable information and easy to implement, on the presence or absence of a harmful amount of formaldehyde in a closed environment, is currently devoid of suitable solution for both domestic use and use industrial sector, offering simple solutions adapted to the situation. ABSTRACT
    The present invention relates to a system for identifying the presence of at least one gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, said system comprising: a support that does not emit gaseous chemical pollutant; a gaseous chemical pollutant sensor secured to the support; said sensor changing color according to the concentration of gaseous chemical pollutant and the exposure time; at least one colorimetric mark corresponding to the range of wavelengths absorbed by the sensor; optionally, a humidity detector; a mobile application or an electronic chip; optical recording means adapted to obtain a view of the sensor or of the assembly formed by the sensor and its support, said optical recording means being connected to the mobile application or to the electronic chip; at least one database, useful for determining the exact color of the recorded sensor and for determining the concentration of the gaseous chemical pollutant in the enclosed environment considered; said at least one database being connected to the mobile application or the electronic chip; and at least one display or transmission means connected to the mobile application or the electronic chip.
    According to one embodiment, the gaseous chemical pollutant is a volatile organic compound (VOC), preferably an aldehyde; more preferably, formaldehyde.
    According to one embodiment, the sensor comprises a nanoporous specific absorbent material functionalized with at least one probe molecule capable of reacting in the presence of the gaseous chemical pollutant; preferably capable of reacting in the presence of a volatile organic compound.
    According to one embodiment, the probe molecule is chosen from enaminomes and β-diketone / amine pairs, imines and hydrazines, or salts derived from these compounds.
    According to one embodiment, the absorbent material is a compound obtained by a sol-gel process; preferably the absorbent material is of parallelepipedal shape.
    According to one embodiment, the system further comprises at least one barcode, preferably located on the support (1).
    The present invention also relates to a method for determining a concentration level of a gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, implementing a system according to the invention, comprising a mobile application or an electronic chip that: a. analyzing a first optical record of the medium including the sensor, b. analyzing a second optical record of the same medium comprising the sensor at the expiration of a duration "t", c. compares the first and the second optical record, d. calculates a color distance, e. analyzing said color distance in relation to the database and determining the concentration of gaseous chemical pollutant in the enclosed environment, and f. displays or transmits the concentration of the gaseous chemical pollutant in the enclosed environment.
    The present invention further relates to a method of using the system according to the invention, for the purpose of determining the concentration of a gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, comprising the following steps: at. provide the support including the sensor and, where appropriate, the moisture sensor, b. provide the mobile application or the microchip, c. place the support comprising the sensor in the enclosed environment to be measured. d. perform a first optical recording of the medium including the sensor, e. performing a second optical recording of the medium comprising the sensor, at the expiration of a duration "t", f. determine the level of concentration according to the method of the invention.
    The present invention also relates to a packaging comprising at least one system according to the invention, said packaging being impervious to moisture, light and / or gases.
    The present invention also relates to an embedded system comprising a device, such as a ventilation device or air purification, in which is mounted integral with at least one system according to the invention.
    DEFINITIONS
    In the present invention, the terms below are defined as follows: "Abaque": a calculation table capable of directly giving the concentration of gaseous chemical pollutants, such as VOCs, from a closed environment from a color recorded optically, or a difference between two colors recorded optically. "Aldehyde" means a chemical compound having at least one -CO-H group. "Alcohol" means a chemical compound having at least one -OH group. "Mobile application": application software; stand-alone program designed to be downloaded and run on a mobile device, such as a smartphone or tablet. "Barcode": For the purpose of the present invention, the term "barcode" includes one-dimensional barcodes (IDs) and two-dimensional barcodes (2D, also called "square-codes") . According to one embodiment, the square codes are chosen from the codes of the type "QR code" (abbreviation of "Quick Response") or of type "Datamatrix". According to one embodiment, the type code "Datamatrix" is a "Flash code". The square codes consist of black modules arranged in a square with a white background. The arrangement of these points defines the information contained in the code. The content of the square codes can be decoded quickly after being read by a suitable barcode reader, of the type of those contained in the mobile terminals, mobile phone type smartphone, or tablet. "Colorimetry": method of analyzing colored samples. "Volatile organic compounds" or "VOCs" means any organic compound, excluding methane, having a vapor pressure greater than or equal to 0,01 kPa at a temperature of 293,15 K (20 ° C) or having a corresponding volatility under particular conditions of use (pressure and temperature). VOCs include aldehydes such as formaldehyde; hydrocarbons such as ethane, propane, butane, benzene; alcohols such as ethanol; acetone; or else perchlorethylene. According to the present invention, the VOCs can be of natural origin or come from human activities. "Pantone Colors": Color of the Pantone Swatch, also called Pantonier, which has eight hundred different tones. "Closed environment": volume delimited by walls creating a physical break between the outside air and the air contained in the volume, and in which the outside air is not circulating. In particular, can be defined as a closed environment within the meaning of the present invention a room, a warehouse, an office, a room or more generally a closed environment, wherein the outside air is not circulating. "Color space" or "Color space": representation of colors in a color synthesis system in the form of triplets. Each color of light can therefore be characterized by a point in a three-dimensional space. "Formaldehyde": organic compound of formula HCHO. "Probe molecule": any organic chemical compound carrying a reactive function which makes it possible to react with the gaseous chemical pollutant and leading to at least one modification of its physicochemical properties, detectable by colorimetry. According to a preferred embodiment, the probe molecule is particularly suitable for the reaction with an aldehyde; preferably with formaldehyde. "Concentration level": concentration range to which, according to its bound values, reference is made by a generic word of the type "weak", "normal" or "high". "Solidarity": assembled, bound, fixed non-removable without voluntary intervention. "Spectrophotometer": A device for measuring the absorbance of a solution at a given wavelength or a given region of the spectrum adjusted according to the substance whose concentration is to be known. "Zone": part of a spatially delimited space.
    DETAILED DESCRIPTION
    The present invention proposes a new solution, easily used on the measurement site, air quality control, identification of the presence of gaseous chemical pollutants; in particular, volatile organic compounds, or the management of pollution induced by this pollutant (s), in a closed environment.
    The present invention is concerned with different gaseous chemical pollutants, especially with volatile organic compounds; preferably, formaldehyde.
    In a first aspect, the subject of the invention is a system for identifying, in a closed environment, the presence of at least one gaseous chemical pollutant and, where appropriate, the management of a pollution induced by this pollutant, which comprises: a carrier which does not emit gaseous chemical pollutant; a gaseous chemical pollutant sensor; made integral with the support; said sensor changing color according to the concentration of gaseous chemical pollutant and the exposure time; at least one colorimetric mark corresponding to the range of wavelengths absorbed by the sensor; a mobile application or an electronic chip; optionally, a humidity detector; optical recording means adapted to obtain a view of the sensor or of the assembly formed by the sensor and its support, said optical recording means being connected to the mobile application or to the electronic chip; at least one database, useful for determining the exact color of the recorded sensor and for determining the concentration of the gaseous chemical pollutant in the enclosed environment considered; said at least one database being connected to the mobile application or the electronic chip; and at least one display or transmission means connected to the mobile application or the electronic chip.
    According to a preferred embodiment, the subject of the invention is a system for identifying, in a closed environment, the presence of a volatile organic compound (VOC) and, where appropriate, the management of a pollution by said VOC, which comprises: a carrier that does not emit gaseous chemical pollutant; a VOC sensor; rendered integral with a non-VOC-emitting medium, said sensor changing color depending on the concentration of gaseous chemical pollutant and the exposure time; at least one color marker corresponding to the range of wavelengths absorbed by the sensor; a mobile application or an electronic chip; optionally, a humidity detector; optical recording means adapted to obtain a view of the sensor or of the assembly formed by the sensor and its support, said optical recording means being connected to the mobile application or to the electronic chip; at least one database, useful for determining the exact color of the recorded sensor and for determining the concentration of VOC in the enclosed environment considered; said at least one database being connected to the mobile application or the electronic chip; at least one display or transmission means connected to the mobile application or the electronic chip.
    According to one embodiment, the VOC is an aldehyde; preferably, formaldehyde. According to one embodiment, the connection between the mobile application or the electronic chip and: the recording means; the at least one database; and / or the at least one display or transmission means is a wireless connection.
    According to one embodiment, the connection between the mobile application or the electronic chip and: the recording means; the at least one database; and / or the at least one display or transmission means is a wired connection.
    According to one embodiment, the system according to the invention does not include an independent colorimeter.
    According to one embodiment, the system according to the invention does not include an external colorimeter.
    According to one embodiment, the system according to the invention does not comprise an independent spectrophotometer.
    According to one embodiment, the sensor makes it possible to trap a gaseous chemical pollutant. According to a preferred embodiment, the sensor makes it possible to trap a volatile organic compound; preferably, an aldehyde; more preferably, formaldehyde. Advantageously, the sensor comprises a porous absorbent material capable of trapping the chemical pollutant on both the outer surface and inside the pores of the material. Thus, the sensor has a detection sensitivity vis-à-vis gaseous chemical pollutants, improved and reproducible.
    According to one embodiment, the sensor comprises a specific absorbent material. According to one embodiment, the sensor comprises a porous absorbent material. According to one embodiment, the sensor comprises a nanoporous absorbent material. According to one embodiment, the sensor is made of a porous absorbent material; preferably, nanoporous.
    According to one embodiment, the porous absorbent material is a material obtained by a sol-gel process. According to one embodiment, the porous absorbent material is obtained according to one of the synthesis methods described in FR 2 890 745.
    According to one embodiment, the porous absorbent material is functionalized with at least one probe molecule capable of reacting in the presence of a gaseous chemical pollutant; preferably with a volatile organic compound (VOC); more preferably, with an aldehyde; more preferably, with formaldehyde.
    According to one embodiment, the probe molecule reacts specifically with a gaseous chemical pollutant; preferably with a volatile organic compound (VOC); more preferably, with an aldehyde; more preferably, with formaldehyde.
    According to one embodiment, the absorbent material is manufactured by a sol-gel process. According to one embodiment, the absorbent material is of parallelepipedal shape. According to one embodiment, the absorbent material comprises a nanoporous specific absorbent material functionalized with at least one probe molecule which is capable of reacting with an aldehyde function. According to one embodiment, the probe molecule is chosen from enaminomes and β-diketone / amine pairs, imines and hydrazines, or salts derived from these compounds. According to one embodiment, the volatile organic compound is formaldehyde.
    Advantageously, the absorbent material changes color depending on the concentration of gaseous chemical pollutant. Thus, when the sensor of the invention comes into contact with a gaseous chemical pollutant, the sensor changes color and absorbs a wavelength whose intensity is proportional to the concentration of pollutant specifically absorbed by said sensor over time. In particular, when the sensor is contacted with aldehyde such as formaldehyde, the sensor absorbs the wavelength range corresponding to the yellow and the intensity is a function of the concentration of absorbed aldehyde and the exposure time.
    The sensor is placed or fixed on a support, and is preferably secured to the support by any appropriate means. According to one embodiment, the sensor is fixed to the support by gluing, with an adhesive not releasing gaseous chemical pollutant; preferably, not releasing VOCs; such as, for example, a hydrocyanic glue.
    In one embodiment, the support is rigid. In a second embodiment, the support is flexible.
    According to one embodiment, the support is not sensitive to moisture.
    According to one embodiment, the support does not emit gaseous chemical pollutant.
    According to one embodiment, the support does not emit VOC.
    According to one embodiment, the support is magnetic.
    According to one embodiment, the support is an adhesive plane support, on one or the other of its faces.
    According to one embodiment, the support is made of paper, plasticized paper, cardboard, polymer.
    According to one embodiment, the medium comprises at least one identification code, in particular a barcode; preferably a square-code; more preferably a QR code. This identification code, including this barcode; preferably this square-code, more preferably this QR code makes it possible to identify the support unitarily. According to one embodiment, the support comprises 2 identification codes, in particular 2 bar codes; preferably 2 square codes; more preferably 2 QR codes. The first identification code identifies the medium; and the second identification code makes it possible to download the mobile application associated with the support and the sensor.
    According to one embodiment, the support is of a uniform color.
    According to one embodiment, the support is of a clear and constant color.
    According to one embodiment, the support is a card configured to be exposed to gaseous chemical pollutants, especially VOCs.
    According to one embodiment, the at least one color marker is on the support. According to one embodiment, the support constitutes a color space, in which the sensor is located. In this embodiment, the support has 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 areas, of which at least one is colored. The coloring of at least one zone makes it possible to create a colored indicator to evaluate the evolution of the color of the sensor.
    Advantageously, at least one zone has a geometric shape. The geometric shape can be a circle, a square, a triangle, a rectangle. According to one embodiment, all the zones are of identical geometrical shape. In another embodiment, at least two areas have different geometric shapes.
    According to one embodiment, the support comprises at least two zones: at least one control zone, an area on which the sensor is placed or fixed.
    According to one embodiment, the support comprises at least three zones: at least one zone of white or black color, at least one control zone, a zone on which the sensor is placed or fixed.
    According to one embodiment, the support contains five zones: a white zone, a black color zone, a gray neutral color zone, preferably pantone gray 424C, a yellow control zone, preferably pantone yellow 108C, and an area on which the sensor is placed or fixed.
    According to one embodiment, the colors of the zones of the support are colors referenced and / or calibrated in color charts. According to one embodiment, the colors of the support areas are Pantone colors. According to one embodiment, the colors of the support areas are RAL colors.
    The function of the black and white colors is to allow adjustment to the actual color temperature, that is, to recalibrate the color to erase the differences due to the optical recorder or lighting.
    The presence and the disposition of the different zones, including the zone including the QR code, have the function of allowing the correction of the geometry of the shooting. Indeed, when shooting, an angle can be formed between the optical recording means and the card involving a slight modification of the dimensions of the card.
    According to one embodiment, the support comprising the gaseous chemical pollutant sensor, at least one colorimetric marker and, optionally, a barcode and a humidity detector, is packaged in a package. According to one embodiment, the packaging of the support is impermeable to moisture, light and / or gases.
    According to one embodiment, the packaging comprises at least one system as described above, said packaging being impervious to moisture, light and / or gases.
    According to one embodiment, the medium is a card.
    According to one embodiment, the support is conditioned under nitrogen.
    According to one embodiment, the package comprises a notice (user manual).
    According to a first embodiment, the package comprises a humidity detector. According to a second embodiment, the humidity detector is placed in an independent packaging. According to one embodiment, the humidity detector is placed on the support; preferably, on the map.
    According to one embodiment, the support comprises at least two sensors, preferably 3, 4, 5, 6 sensors, each sensor being packaged in an individual package, the 2,3, 4, 5, 6 individual packages being placed in a box. case.
    According to one embodiment, the packaging or packaging comprises several supports, said supports being each separately packaged.
    According to one embodiment, the humidity sensor comprises at least three reaction zones with the ambient air. These zones make it possible to know qualitatively the humidity of the room. Each zone corresponds to a particular value of humidity. According to one embodiment, the humidity sensor comprises 3, 4, 5, 6, 7, 8, 9, 10 zones of determination of the humidity. Preferably, the humidity sensor is of the type marketed by 3M under the name Humidity indicator card. The invention includes an optical sensor recording means for acquiring a recording, for example an image or a photograph of the sensor.
    According to one embodiment, the optical recording means is a camera. According to one embodiment, the optical recording means is a camera. According to one embodiment, the optical recording means is a sensor comprising at least one photodiode, preferably a CMOS type sensor ("Complementary Metal-Oxide Semiconductor"). According to one embodiment, the optical recording means is included in a personal computer, which is preferably a mobile terminal (smart phone, called "smartphone" or tablet touch) type lOS or Android.
    According to one embodiment, the mobile application or the electronic chip analyzes a first record taken by means of the optical recorder and classifies it as a reference record. According to one embodiment, the mobile application or the electronic chip comprises an expert system for analyzing the recording. According to one embodiment, the mobile application or the electronic chip displays the registration and a request for validation of the registration, or a request to redo a registration. At the end of a time t, the mobile application or the electronic chip sends a notification to take a second photo and to indicate a humidity data of the closed environment. In the embodiment of the invention where the system comprises a moisture detector, the mobile application preferably comprises a humidity analysis system detected by the humidity detector.
    According to one embodiment, the mobile application or the electronic chip comprises a system for analyzing the volume of the enclosed environment in which the sensor is placed, after having been deconditioned.
    According to one embodiment, the mobile application or the electronic chip comprises an environmental condition analysis system applying to the unconditioned sensor (in particular season, weather, presence or absence of heating or air conditioning, volume of the room, presence or no ventilation).
    According to one embodiment, the mobile application or the electronic chip comprises a system for segregating the optical images recorded by the optical recording means, and means of communication with the user, to ask him if necessary to record again an optical image.
    According to one embodiment, the mobile application or the electronic chip is able to compare two optical recordings that have been successively submitted to it for a given closed environment, and to evaluate the color difference or color difference of the sensor between the two optical images.
    According to one embodiment, the mobile application or the electronic chip is capable of processing the data, in particular the image, obtained by the optical recording means and communicating with the database.
    The two-color comparison method is well known to those skilled in the art. Indeed, it requires a calculation that can find the difference between two colors involving two points, in a three-dimensional space: the distance between two points is the difference in color. The three dimensions of the space are replaced by the three primary colors: red, green, blue. All colors are a combination of these three basic colors.
    According to one embodiment, the two-color comparison method is chosen from the methods having CIE Lab or HSV as a reference. According to a preferred embodiment, the two-color comparison method uses the HSV (Hue Saturation Value) reference (TSV).
    The HSV repository is a color management system based on color perception and uses a 3D space in which dimensions are defined by hue, saturation and value. The HSV repository is also known as HSB (Hue Saturation Brightness).
    In the CIE LAb repository, the calculation itself uses the three-dimensional space CIE Lab, formed by the axis L (black-white), the axis a (green-magenta) and the axis b (yellow - blue), which corresponds to the difference of color sensation. The greater the distance, the greater the difference in color. In the opposite case, the shorter the distance, the less difference there is between the two shades. It is simply a matter of replacing their CIE Lab coordinates in the following algebraic equation:
    According to one embodiment, the application is in connection with an embedded server comprising the database or with a remote server comprising the database.
    According to one embodiment, the mobile application comprises a software for determining the concentration of gaseous chemical pollutant, in particular volatile organic compound, in the sensor of which it has analyzed an optical image, using information contained in a database .
    According to one embodiment, the mobile application calculates the concentration of gaseous chemical pollutants; optionally, the mobile application displays an evaluation of the volatile organic compound (s) concentration (s). According to one embodiment, the mobile application displays one of the following three elements: (1) slightly polluted air; for example, for formaldehyde, less than 30 micrograms per cubic meter (2) moderately polluted air; for example, for formaldehyde, from 30 to 100 micrograms per cubic meter (3) Air at risk; for example, for formaldehyde, more than 100 micrograms per cubic meter.
    According to one embodiment, the database contains abacuses, making it possible to identify the exact color of the sensor, and to deduce from this color the concentration of the gaseous chemical pollutant, in particular the volatile organic compound, present in the room.
    According to one embodiment of the invention, the support comprising the sensor is embedded in a device, in particular in a reader, in a ventilation device or in an air purification device.
    According to one embodiment, the support comprises at least one electronic component, in particular an integrated circuit also called an electronic chip. According to one embodiment, the medium comprises a digital integrated circuit, preferably a digital signal microprocessor.
    According to one embodiment, the support comprises a chip and a Red Green Blue sensor.
    According to one embodiment, the embedded system according to the invention comprises a light source, for example a white LED, illuminating the sensor, and a means of optical recording of the color of the sensor. According to one embodiment, the optical recording means is a Red Green Blue sensor.
    According to one embodiment, the integrated circuit performs all the functions mentioned above for the mobile application.
    According to one embodiment, the embedded system comprises a sensor according to the invention, a light source and a Red Green Blue sensor. According to one embodiment, the embedded system comprises a protective film between the light source and the Red Green Blue sensor to avoid direct exposure. According to one embodiment, the embedded system comprises a mask for protection against interference.
    According to one embodiment, the system according to the invention further comprises a database of tips, which are related to the identified color of the sensor, and sent by the mobile application to the user. These tips include the ventilation of the enclosed environment, the eradication of a source of gaseous chemical pollutant such as VOCs or the use of a purifier. These tips can also be presented in the form of links to websites presenting products whose quality has been certified.
    According to one embodiment, the system according to the invention further comprises a display or transmission means connected to the mobile application or to the electronic chip. According to one embodiment, the display means is configured to display the concentration of gaseous chemical pollutant and / or tips extracted from the advice database. According to one embodiment, the transmission means is configured to transmit the estimated concentration value of the gaseous chemical pollutant, in particular VOC.
    In a second aspect, the invention also relates to a method for determining the concentration of a gaseous chemical pollutant; preferably, a volatile organic compound, in a closed environment, implementing the system described above comprising a mobile application that: a. analyzing a first optical record of the medium including the sensor, b. analyzing a second optical record of the same medium comprising the sensor at the expiration of a duration "t", c. compares the first and the second optical record, d. calculates a color distance, e. analyzing said color distance in the duration "t" in relation to the database, and determining the concentration of the gaseous chemical pollutant in the enclosed environment, and f. displays or transmits the concentration of the gaseous chemical pollutant in the enclosed environment.
    According to one embodiment, the method according to the invention further comprises the step of evaluating the quality of the image analyzed and, if necessary, requiring a new optical recording.
    According to one embodiment, the method according to the invention further comprises the step of taking into account parameters that can influence the results, for example, and in a nonlimiting manner, the temperature of the enclosed environment, the environmental pressure. , the presence and age of the furniture, the volume of the enclosed environment, the presence of ventilation, heating or air conditioning, the number of doors or windows. The invention has many advantages, including that of allowing a quick test, reliable and very energy efficient. The invention also relates to a method of using the system for determining the concentration of a gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, comprising the following steps: a. provide the support including the sensor and, where appropriate, the moisture sensor, b. provide the mobile application or the microchip, c. placing the support comprising the sensor in the enclosed environment to be measured, d. perform a first optical recording of the medium including the sensor, e. performing a second optical recording of the medium comprising the sensor, at the expiration of a duration "t", f. determine the level of concentration according to the method described above.
    According to one embodiment, the first recording is made between 5 and 90 minutes after the deconditioning of the card. According to one embodiment, the application is provided by downloading using the barcode, preferably using the QR code, provided on the packaging or the notice. According to one embodiment, the code located on the support serves to identify the sensor unitarily.
    According to one embodiment, the method of use according to the invention further comprises the preliminary step, before opening the packaging in which the card is, to prepare the closed environment to be measured and the optical recording conditions. .
    According to one embodiment, the method of use according to the invention further comprises the step of determining the humidity of the enclosed environment. Advantageously, the optical recording is performed at a time when there is a good brightness in the enclosed environment. Advantageously, the support is placed at a light source, for example a window, preferably without direct exposure to sunlight. According to one embodiment, the duration "t" ranges from 2h to 48h. Preferably, the duration "t" is equal to 24 hours.
    BRIEF DESCRIPTION OF THE FIGURES
    Figure 1 is a top view of the system according to the invention.
    Figure 2 illustrates the onboard sensor according to the invention.
    REFERENCE LISTS 1 - Support 2 - Sensor 3 - Central square 4 - Rectangle SA, SB, SC, SD, SE - Color reference square 6 - QR Code 7 - White LED 8 - Sensor Red Green Blue 9 - Protective film 10 - White surface 11 - Protection mask against interference
    EXAMPLES
    The present invention will be better understood on reading the following examples which illustrate the invention in a nonlimiting manner.
    Example 1: Target Card
    FIG. 1 shows an embodiment of the invention in which a support 1 carries a sensor 2, which is a functionalized nanoporous specific absorbent material. The support 1 is a card-type support. The sensor 2 is positioned on this support 1 in a central square 3 comprising in its center a rectangle 4 delimiting a zone intended to receive the sensor 2. The sensor 2 is fixed by gluing, with a glue not releasing any VOC, for example a hydrocyanic glue.
    The support further comprises four squares 5A, 5B, 5C, 5D of different colors: for example a yellow square (represented by the hatched square), a white square, a gray square and a black square whose placement order is without importance.
    The sensor 2 is a formaldehyde sensor which evolves in a range of yellows and at least one of the squares 5A, 5B, 5C, 5D is yellow pantone color for the purpose of evaluating the color evolution of the sensor with a immutable witness in the color gamut. The white, gray and black squares are used to adjust to the actual color temperature ie recalibrate the color to erase the differences due to the optical recorder or lighting.
    The support 1 further comprises a QR code 6 which serves to identify the sensor unitarily, and in particular to identify the sensor in the database.
    Advantageously, the squares 5A, 5B, 5C, 5D and the QR code 6 are positioned on the support 1 in such a way that they make it possible to correct the geometry of the shooting, if necessary. Indeed, when shooting, an angle can be formed between the optical recording means and the card involving a slight modification of the dimensions of the card.
    Advantageously, the support further comprises one or more other squares 5E which are positioned relative to squares 5A, 5B, 5C, 5D and QR code 6 in such a way that they make it possible to evaluate a possible inclination when taking view.
    Example 2: Example of use of the card The user buys a card, which is supplied in a package under nitrogen. A user's manual is provided with the card. The notice states that the card must be used in connection with a smartphone and a humidity detector, and asked the user to download the mobile application. The notice specifies to the user that he must take a picture in the few minutes following the exposure of the card to the ambient air, preferably from 5 to 90 minutes after the opening of the packaging. The shooting conditions are specified on the instructions. To optimize the shooting, it is desirable to choose a moment of the day when there is a good brightness for the photo, and to place the target at the edge of a window without direct sunlight. Π is also necessary not to use flash to avoid overexposure. Indeed, an exposure to the flash or to a source of light implies a spatial inhomogeneity of the illumination.
    As a first step, the user tests the humidity of the enclosed environment in which the VOC concentration is measured. The application goes into photo mode and the user takes a picture of the target. The application checks whether the photo is of poor quality or not, that is to say, if it is too blurry, not straight enough, with colors too dark, with too light colors, bad colors. If this is the case, the application may ask to repeat the operation of taking the initial picture which is a reference picture. Then, the application reports that you will be asked in 24h to take the final photo and complete the test.
    In a second step, after 24 hours, the application requests the visible estimate on the humidity detector then, asks to take a second photo, final, under the same conditions as the first photo. The application calculates the pollutant from both photos. The application will seek to determine the parameters that can influence the results such as the temperature of the enclosed environment, the environmental pressure, the furniture and its age, the volume of the room, the presence of a ventilation, the number of doors , of windows and among this number, those that are open.
    Example 3: Embedded System
    Figure 2 illustrates an embedded system according to the invention. The on-board system includes a device, in particular in a reader, a ventilation device or an air purification device, a support 1 comprising a sensor 2, a white LED 7 illuminating the sensor 2 and a sensor Red Green Blue 8 for capturing the sensor light 2. The embedded system also includes a protective film 9 separating the white LED 7 from the sensor Red Green Blue 8, in order to avoid direct exposure of the sensor
    Red Green Blue 8. The embedded system further comprises a white surface 10 at the rear of the support 1 and an interference protection mask 11.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    A system for identifying the presence of at least one gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, said system comprising: a support (1) not emitting gaseous chemical pollutant; a gaseous chemical pollutant sensor (2) made integral with the support (1); said sensor changing color according to the concentration of gaseous chemical pollutant and the exposure time; at least one colorimetric mark (5A, 5B, 5C, 5D, 5E) corresponding to the range of wavelengths absorbed by the sensor; optionally, a humidity detector; a mobile application or an electronic chip; optical recording means adapted to obtain a view of the sensor (2) or of the assembly formed by the sensor (2) and its support (1), said optical recording means being connected to the mobile application or to the electronic chip; at least one database, useful for determining the exact color of the recorded sensor and for determining the concentration of the gaseous chemical pollutant in the enclosed environment considered; said at least one database being connected to the mobile application or the electronic chip; and at least one display or transmission means connected to the mobile application or the electronic chip.
    [2" id="c-fr-0002]
    2. System according to claim 1, wherein the gaseous chemical pollutant is a volatile organic compound (VOC), preferably an aldehyde; more preferably, formaldehyde.
    [3" id="c-fr-0003]
    3. System according to any one of claims 1 to 2, characterized in that the sensor (2) comprises a nanoporous specific absorbent material functionalized with at least one probe molecule capable of reacting in the presence of the gaseous chemical pollutant; preferably capable of reacting in the presence of a volatile organic compound.
    [4" id="c-fr-0004]
    4. System according to claim 3, characterized in that the probe molecule is chosen from enaminomes and β-diketone / amine couples, imines and hydrazines, or salts derived from these compounds.
    [5" id="c-fr-0005]
    5. System according to any one of claims 1 to 4, characterized in that the absorbent material is a compound obtained by a sol-gel process; preferably the absorbent material is of parallelepipedal shape.
    [6" id="c-fr-0006]
    6. System according to any one of claims 1 to 5, characterized in that the system further comprises at least one barcode, preferably located on the support (1).
    [7" id="c-fr-0007]
    A method for determining a concentration level of a gaseous chemical pollutant, preferably a volatile organic compound, in a closed environment, implementing a system according to any one of claims 1 to 6, comprising an application mobile or an electronic chip that: a. analyzing a first optical record of the medium comprising the sensor; b. analyzing a second optical record of the same medium comprising the sensor at the expiration of a duration "t"; vs. compares the first and the second optical record; d. calculates a color distance; e. analyzing said color distance in relation to the database and determining the concentration of the gaseous chemical pollutant in the enclosed environment; and F. displays or transmits the concentration of the gaseous chemical pollutant in the enclosed environment.
    [8" id="c-fr-0008]
    8. Method of using the system according to any one of claims 1 to 6, for the purpose of determining the concentration of a gaseous chemical pollutant. preferably a volatile organic compound, in a closed environment, comprising the following steps: a. provide the support including the sensor and, where appropriate, the moisture detector; b. provide the mobile application or the microchip; vs. placing the support comprising the sensor in the enclosed environment to be measured; d. perform a first optical recording of the medium comprising the sensor; e. performing a second optical recording of the medium comprising the sensor, at the expiration of a duration "t"; f. determine the concentration level according to the method of claim 7.
    [9" id="c-fr-0009]
    9. Packaging comprising at least one system according to any one of claims 1 to 6, said packaging being impervious to moisture, light and / or gases.
    [10" id="c-fr-0010]
    10. Embedded system comprising a device, such as a ventilation device or air purification, in which is mounted integral with at least one system according to any one of claims 1 to 6.
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    同族专利:
    公开号 | 公开日
    CN109564165A|2019-04-02|
    EP3443328A1|2019-02-20|
    WO2017178774A1|2017-10-19|
    FR3050270B1|2018-04-27|
    US20190137405A1|2019-05-09|
    KR20190039880A|2019-04-16|
    JP2019520588A|2019-07-18|
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    法律状态:
    2017-04-19| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-20| PLSC| Search report ready|Effective date: 20171020 |
    2018-04-20| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-18| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-20| PLFP| Fee payment|Year of fee payment: 5 |
    2021-04-23| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1653336A|FR3050270B1|2016-04-15|2016-04-15|SYSTEM FOR MONITORING AIR QUALITY IN A CLOSED ENVIRONMENT|
    FR1653336|2016-04-15|FR1653336A| FR3050270B1|2016-04-15|2016-04-15|SYSTEM FOR MONITORING AIR QUALITY IN A CLOSED ENVIRONMENT|
    KR1020187032339A| KR20190039880A|2016-04-15|2017-04-14|A system for conditioning air quality in a closed environment|
    US16/093,008| US20190137405A1|2016-04-15|2017-04-14|System for monitoring air quality in an enclosed environment|
    JP2019505294A| JP2019520588A|2016-04-15|2017-04-14|System for monitoring air quality in a closed environment|
    EP17721788.2A| EP3443328A1|2016-04-15|2017-04-14|System for controlling the quality of air in a closed environment|
    CN201780031803.5A| CN109564165A|2016-04-15|2017-04-14|System for monitoring the air quality in enclosed environment|
    PCT/FR2017/050907| WO2017178774A1|2016-04-15|2017-04-14|System for controlling the quality of air in a closed environment|
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