Glass article element comprising system for predicting and / or detecting condensation

Abstract

The invention relates to a glazing element (1) for a vehicle, comprising: a glazing unit (2) extending along a main surface (3); a first temperature sensor (6) for sensing a temperature of the surroundings at a first point (7) outside the unit of glassware; a humidity sensor (8) designed to acquire a relative humidity of the ambient environment; and an assembly comprising at least one second temperature sensor (10), the assembly being configured to acquire a plurality of second temperatures at third points (11) different from each other on the first surface.

Description

Technical Field

[0001] The present invention relates to the detection of condensation on a glazing unit of a vehicle. In particular, the present invention relates to a glazing element for a vehicle, the glazing element comprising a glazing unit and a system for predicting and / or detecting condensation on the glazing unit. Background Art

[0002] During the occurrence of condensation droplets on the inner surface of the glazing unit of a vehicle, it is known to manually activate the ambient temperature regulator and / or the ventilation regulator in the vehicle in order to control the evaporation of the condensation droplets.

[0003] However, this method can distract the driver of the vehicle. In addition, this method is only feasible when condensation droplets have already appeared and have impaired the driver's visual perception through the glass unit.

[0004] To this end, document EP 3 552 004 describes a capacitive condensation sensor comprising interdigitated electrodes inserted into a glazing unit. During the formation of condensation on the inner surface of the glazing unit, the capacitance measured by the sensor changes. Thus, visual detection of condensation can be dispensed with and distraction of the driver can be reduced.

[0005] However, the sensor disclosed in document EP 3 552 004 is not able to detect the smallest condensation drops. Therefore, the driver may already perceive the condensation before the capacitive sensor detects it.

[0006] Furthermore, capacitive detection of condensation may have a delay of about ten seconds. For example, known condensation sensors include a material that can absorb water from condensation droplets. In this case, the capacitance of the material is measured by the sensor, and the delay of the sensor may depend on the water absorption dynamics of the material. This delay may be sufficient to increase the density of the condensation and thus impair the visual perception of the driver.

[0007] Finally, the nucleation of condensation droplets cannot be predicted using the sensor described in document EP 3 552 004. Summary of the invention

[0008] One object of the present invention is to propose a solution for predicting and / or detecting the occurrence of condensation on the inner surface of a vehicle's windscreen before the driver of the vehicle can perceive the condensation drops.

[0009] This object is achieved in the context of the present invention by means of a glazing element for a vehicle, comprising a glazing unit extending along a main surface, the glazing unit comprising a first glass sheet having a first face capable of coming into contact with the surroundings of the vehicle interior and capable of supporting the nucleation of condensation droplets,

[0010] The glass product element is characterized in that the glass product element comprises:

[0011] a first temperature sensor configured to acquire a first temperature T1 of the surroundings at a first point outside the glazing unit, a first distance d1 between the first point and a point of the first face closest to the first point being between 20 μm and 5 cm,

[0012] a humidity sensor configured to acquire the relative humidity RH of the surroundings at a second point outside the glazing unit, a second distance d2 between the second point and a point of the first face closest to the second point being between 20 μm and 5 cm, preferably the first point coincides with the second point,

[0013] An assembly comprising at least one second temperature sensor, the assembly being configured to acquire a plurality of second temperatures T2 at third points of the first face that are different from one another.

[0014] The invention is advantageously completed by the following features, which may be used alone or in any technically possible combination thereof:

[0015] The glazing assembly comprises a control unit configured to:

[0016] Acquire a first temperature T1 of the surrounding environment through a first temperature sensor,

[0017] The humidity level RH of the surrounding environment is obtained through the humidity sensor.

[0018] Acquire multiple second temperatures T2 through the components,

[0019] Determine the dew point T based on the first temperature T1 and the humidity level RH dp ,as well as

[0020] Comparing the dew point with a plurality of second temperatures T2,

[0021] - The control unit is configured to dp comparing with a plurality of second temperatures T2 to determine the presence of condensed droplets on the first surface,

[0022] the first face comprises a detection surface comprising the third point and extending along at least one element selected from the group consisting of: a side edge of the glazing unit, a side edge of the glazing unit on the driver's side, a lower side edge of the glazing unit, a corner of the glazing unit, and a lower corner of the glazing unit on the driver's side,

[0023] - the second temperature sensor is a photodetector configured to detect a light beam having a wavelength within the infrared wavelength range,

[0024] - the second temperature sensor is an imager, the first face comprises a detection surface, the imager is configured to image the detection surface,

[0025] - the photodetector comprises an infrared thermopile, the first face comprising the detection surface, the infrared thermopile being mounted on a support configured to orient the infrared thermopile towards each third point of a plurality of third points,

[0026] the glazing element comprises a housing configured to support a rearview mirror of a vehicle, the photodetector being arranged in the housing,

[0027] - the assembly comprises a plurality of second temperature sensors, each second temperature sensor being arranged in direct contact with the first face,

[0028] at least one of the second temperature sensors comprises a layer of electrically conductive and / or semiconductive material, which layer is in contact with the first face,

[0029] - a second temperature sensor comprising a circuit configured to measure the resistance of the layer,

[0030] - the layer is formed by strips of material deposited on the first face, preferably the layer is formed by strips of material deposited on the first face by cathode sputtering,

[0031] - the layer is transparent,

[0032] - conductive material and / or semiconductive material is at least selected from indium tin oxide and zinc oxide,

[0033] The glazing element comprises a voltage generator having two terminals connected to the layer, the generator being configured to generate a voltage greater than 10V, in particular greater than 20V and preferably greater than 40V. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will appear from the following description, which is illustrative and non-limiting only and must be read in conjunction with the accompanying drawings, in which:

[0035] [Figure 1 ]- Figure 1 A glass product element according to one embodiment of the present invention is schematically shown.

[0036] [ Figure 2 ]- Figure 2 Schematically shows a cross-sectional view of a glass product element according to one embodiment of the present invention,

[0037] [ Figure 3 ]- Figure 3 schematically shows a detail of a cross-sectional view of a glazing element according to one embodiment of the invention,

[0038] [ Figure 4 ]- Figure 4 A glass product element according to one embodiment of the present invention is schematically shown.

[0039] [ Figure 5 ]- Figure 5 A method for predicting and / or detecting coagulation according to an embodiment of the present invention is schematically shown.

[0040] In all the drawings, similar elements are marked with the same reference numerals.

[0041] definition

[0042] A "glazing unit" is understood to mean a structure comprising at least one organic glass sheet or mineral glass sheet suitable for installation in a vehicle. A "laminated glazing unit" is understood to mean a glazing assembly comprising at least two glass sheets and an interlayer made of a plastic material, which is preferably viscoelastic, for separating the two glass sheets. The interlayer may comprise one or more viscoelastic polymer layers, such as polyvinyl butyral (PVB) or ethylene-vinyl acetate copolymer (EVA). The interlayer film is preferably standard PVB or acoustic PVB. Acoustic PVB may typically comprise three layers: two standard PVB outer layers and an inner PVB layer comprising a plasticizer to make the inner layer less rigid than the outer layer.

[0043] The glazing unit of the glazing element according to all embodiments of the invention has a shape and geometry configured to be mounted on a vehicle according to a predetermined specific position. Thus, the side edge of the glazing unit on the driver's side, the side edge of the glazing unit on the passenger's side, the upper side edge of the glazing unit, and the lower side edge of the glazing unit can be defined relative to the predetermined position. In the same way, the upper corner of the glazing unit on the driver's side, the upper corner of the glazing unit on the passenger's side, the lower corner of the glazing unit on the driver's side, and the lower corner of the glazing unit on the passenger's side can be defined relative to the predetermined position.

[0044] The "side edge on the driver's side" of the glazing unit is understood to mean the side edge of the glazing unit which is on the driver's side when the glazing unit is mounted to the vehicle according to a specific position predetermined by the shape and geometry of the glazing unit.

[0045] The "passenger-side side edge" of the glazing unit is understood to mean the side edge of the glazing unit located on the passenger side opposite the driver's side when the glazing unit is mounted to the vehicle in a specific position predetermined by the shape and geometry of the glazing unit.

[0046] An “upper side edge” of the glazing unit is understood to mean the side edge of the glazing unit which is positioned at the upper part of the glazing unit when the glazing unit is mounted to the vehicle according to a specific position predetermined by the shape and geometry of the glazing unit.

[0047] The "lower side edge" of the glazing unit is understood to mean the side edge of the glazing unit which is located at the bottom of the glazing unit when the glazing unit is mounted to the vehicle according to a specific position predetermined by the shape and geometry of the glazing unit.

[0048] The "driver's side upper corner" of the glazing unit is understood to mean the corner of the glazing unit located above the driver's side glazing unit when the glazing unit is mounted to the vehicle according to a specific position predetermined by the shape and geometry of the glazing unit.

[0049] The "lower corner on the driver's side" of the glazing unit is understood to mean the corner of the glazing unit located below the glazing unit on the driver's side when the glazing unit is mounted to the vehicle according to a specific position predetermined by the shape and geometry of the glazing unit.

[0050] “Infrared wavelength range” is understood to mean the wavelength range between 780 nm and 1 mm, in particular the wavelength range between 780 nm and 20 μm, preferably the wavelength range between 780 nm and 2 μm.

[0051] "Relative humidity", or RH for short, is understood to mean the ratio between the partial pressure of water vapour contained in the ambient air at a certain temperature and the saturated vapour pressure at the same temperature. DETAILED DESCRIPTION

[0052] Overall architecture of the glazing element 1 and theoretical basis for the operation of the glazing element 1

[0053] Reference Figure 1 , a glazing element 1 for a vehicle comprises a glazing unit 2. The glazing unit 2 extends along a main surface 3. The glazing unit 2 comprises a first glass sheet 4. The first glass sheet 4 has a first face F4 capable of coming into contact with the surroundings of the vehicle interior and capable of supporting the nucleation of condensation droplets 5. The glazing unit 1 may be a laminated glazing unit.

[0054] The glazing element 1 comprises a first temperature sensor 6 configured to acquire a first temperature T1 of the surrounding environment at a first point 7 outside the glazing unit 2. The first temperature sensor 6 may comprise a detector arranged at the first point 7. A first distance d1 between the first point 7 and a point of the first face F4 closest to the first point 7 is between 20 μm and 5 cm, preferably between 5 μm and 2 cm, preferably between 1 mm and 1 cm.

[0055] The glazing element 1 comprises a humidity sensor 8 configured to acquire the relative humidity RH of the surroundings at a second point 9 outside the glazing unit 2. The humidity sensor 8 may comprise a detector arranged at the second point 9. A second distance d2 between the second point 9 and a point of the first face F4 closest to the second point 9 is between 20 μm and 5 cm, preferably between 5 μm and 2 cm, preferably between 1 mm and 1 cm.

[0056] The glazing element 1 comprises an assembly comprising at least one second temperature sensor 10. This assembly is configured to acquire a plurality of second temperatures T2 at third points 11 of the first face F4, the third points 11 being different from one another.

[0057] Therefore, the dew point T adjacent to the first surface F4 can be dp The temperature of the first surface F4 at different points of the first surface F4 is compared. dp It is understood to mean a dew point located at a distance between 20 μm and 5 cm, preferably between 500 μm and 2 cm, preferably between 1 mm and 1 cm from the first face F4. In fact, the inventors have found that by comparing the temperature at different third points of the first face 4 (subject to high temperature variations) with the dew point T of the adjacent surface dpBy comparison, the nucleation of the condensed liquid droplets 5 on the first surface F4 can be accurately predicted or detected.

[0058] In fact, when the temperature of the first surface F4 is lower than the dew point T adjacent to the first surface F4 dp (also called "dew point temperature"), condensation will occur on the first surface F4. dp The dew point temperature T can be calculated based on the relative humidity RH of the surrounding environment and the first temperature T1 of the surrounding environment adjacent to the first surface F4. dp It is defined by Formula 1 as follows:

[0059]

[0060] Among them, P vap (T1) is the vapor pressure of water at the first temperature T1, a is a constant pressure equal to 6.1121 mbar, b is a constant value equal to 18.678, and c is a constant temperature equal to 257.14°C. Therefore, according to P vap (T1) Determine the dew point T dp .

[0061] The vapor pressure P of water at the first temperature T1 vap (T1) is defined by Formula 2 and Formula 3 as follows:

[0062]

[0063]

[0064] Among them, P sat is the saturated vapor pressure of water at temperature T1, ΔH ν is the latent heat of vaporization of water, equal to 2,461.106 J.kg -1 , and R air is the gas constant of moist air, equal to 461.0 JK -1 .kg -1 .

[0065] Therefore, if at least one of the second temperatures T2 is lower than the dew point T adjacent to the first face F4, dp , the nucleation of the condensation droplet 5 is detected. In addition, when at least one of the second temperatures T2 is equal to the dew point T adjacent to the first surface F4 dp When the difference between is positive and decreases with time, the nucleation of condensation droplets 5 can be predicted.

[0066] The glazing element 1 may include a control unit 12 configured to:

[0067] - obtaining a first temperature T1 of the surrounding environment through a first temperature sensor 6,

[0068] - Obtain the humidity level RH of the surrounding environment through the humidity sensor 8,

[0069] - obtaining a plurality of second temperatures T2 by means of the component,

[0070] - Determine the dew point T based on the first temperature T1 and the humidity level RH dp ,as well as

[0071] - For dew point T dp Compare with a plurality of second temperatures T2.

[0072] The control unit 12 may be configured to dp The presence of condensation droplets on the first surface F4 is determined by comparing the dew point T dp A value indicative of the presence of condensation droplets is determined by comparison with the plurality of second temperatures T2 , and the control unit 12 may be configured to determine the presence of condensation droplets on the first face F4 based on the value indicative of the presence of condensation droplets.

[0073] The control unit 12 may be configured to predict nucleation of condensation droplets based on a series of values ​​indicative of the presence of condensation droplets.

[0074] Reference Figure 4 Another aspect of the invention is a method 400 for determining and / or predicting the presence of condensation droplets on a first face F4 of a glass product element 1, the method 400 comprising the following steps:

[0075] - obtaining 401 a first temperature T1 of the surrounding environment by means of a first temperature sensor 6,

[0076] - acquiring 402 the humidity level RH of the surrounding environment by means of the humidity sensor 8,

[0077] - acquiring 403 a plurality of second temperatures T2 by means of a component,

[0078] - Determine 404 the dew point T according to the first temperature T1 and the humidity level RH dp ,as well as

[0079] - Dew point temperature T dp The dew point temperature T is compared 405 with at least one of the second temperatures T2 and preferably the dew point temperature T dp Compare with a plurality of second temperatures T2.

[0080] The method may include the step of determining 406 the presence of condensation droplets 5 based on the comparison 405. Preferably, the step of determining 406 may include determining the presence of condensation droplets 5 by measuring the dew point T dp A sub-step of determining a value indicating the presence of condensed liquid droplets by comparing with the plurality of second temperatures T2, and then a sub-step of determining the presence of condensed liquid droplets on the first face F4 based on the value indicating the presence of condensed liquid droplets.

[0081] The method may include repeating the steps of obtaining 401, obtaining 402, obtaining 403, determining 404, comparing 405 and determining 406, and then comparing 407 the representative values ​​determined by each of the steps of determining 406. Thus, the nucleation or presence of condensation droplets 5 on the first face F4 may be predicted.

[0082] The method may include, after the determination step 406 and / or in the comparison step 407, a step of updating the vehicle's heating, ventilation and air conditioning (HVAC) system to increase the vehicle's ambient temperature and / or the temperature of the first face F4 after determining the presence of condensation droplets 5 and / or predicting the nucleation of condensation droplets 5. Thus, evaporation of condensation droplets 5 may be performed and / or nucleation of condensation droplets 5 may be avoided.

[0083] First temperature sensor 6

[0084] Reference Figure 3 The first temperature sensor 6 may be a bandgap temperature sensor. Such a sensor comprises a semiconductor material and is configured to determine the ambient temperature based on the bandgap characteristics of the semiconductor material. The first bandgap temperature sensor 6 may be a SHT21 type sensor sold by Sensirion (registered trademark).

[0085] The first temperature sensor 6 may comprise a support separating the first point 7 from the first face F4 by a first distance d1 . The support may be fixedly mounted to the first face F4 .

[0086] Humidity sensor 8

[0087] Reference Figure 3 The humidity sensor 8 may be a capacitive sensor configured to acquire the relative humidity RH of the surrounding environment. The humidity sensor 8 may be a SHT21 sensor sold by Sensirion (registered trademark).

[0088] The humidity sensor 8 and the first temperature sensor 6 may be integrated. The first point 7 may coincide with the second point 9. "Coincident" is understood to mean that the distance between the first point 7 and the second point 9 is less than 5 mm, preferably less than 2 mm, preferably less than 1 mm. Thus, the dew point T can be measured at a single point adjacent to the first face F4. dp Take measurements.

[0089] Detection surface 11

[0090] The first face F4 comprises a detection surface 13. The detection surface 13 comprises a third point. The detection surface 13 extends along at least one element selected from the following elements: a side edge of the glazing unit 2, a side edge of the glazing unit 2 on the driver's side, a lower side edge of the glazing unit 2, a corner of the glazing unit 2, and a lower corner of the glazing unit 2 on the driver's side.

[0091] In fact, the inventors have found that the above-mentioned portion of the first face F4 is able to undergo nucleation of condensation droplets 5 before nucleation of condensation droplets 5 on other portions of the first face F4. Therefore, nucleation of condensation droplets 5 can be detected before the driver of the vehicle visually detects condensation droplets 5 on the rest of the first face F4.

[0092] Second temperature sensor 10

[0093] The second temperature sensor 10 may be a photodetector configured to detect a light beam having a wavelength included in the infrared wavelength range. Therefore, the second temperature T2 may be measured at a distance from the first face F4 using a single sensor and by simplifying the measurement of the second temperature.

[0094] The glass product element 1 may include a housing 14 configured to support a rearview mirror of the vehicle. The housing 14 may be mounted on the first face F4. The photodetector may be arranged in the housing 14. Thus, during use of the vehicle, the light beam passing through all points of the detection surface 13 may be detected without visually obstructing the driver.

[0095] The second temperature sensor 10 may be an imager. The imager is configured to image the detection surface 13. Therefore, the second temperatures T2 of a plurality of third points 11 may be acquired simultaneously. The imager may be a camera of the RS-PRO T-10 model of the registered trademark "RS Components". The imager may be configured to acquire more than ten second temperatures T2 and preferably acquire more than one hundred second temperatures T2. Therefore, the accuracy of the detection of the nucleation of the condensation droplets on the first face F4 may be improved relative to the detection performed using a smaller number of second temperatures T2.

[0096] The photodetector may include an infrared thermopile. The infrared thermopile may be mounted on a support configured to orient the infrared thermopile in the direction of each of the plurality of third points 11. Thus, the plurality of second temperatures T2 may be measured remotely while simplifying the manufacture of the glass product element 1, such as for example a glass product element 1 including an imager.

[0097] The assembly may comprise a plurality of second temperature sensors 10, each second temperature sensor 10 being arranged in direct contact with the first face F4. Thus, a plurality of second temperatures T2 of the first face F4 may be measured.

[0098] At least one of the second temperature sensors 10 may include a layer 15 formed of a conductive material or a semiconductor material, the layer 15 being in contact with the first face F4. Thus, at least one of the second temperatures T2 may be measured by measuring the resistance of the layer 15, which makes it possible to simplify the manufacture of the second temperature sensor 10. One or more layers 15 may be arranged on the side edge of the glazing unit 2, preferably on the side edge on the driver's side of the glazing unit 2, and / or on the lower side edge of the glazing unit 2, and / or on the corner of the glazing unit 2, preferably on the lower corner on the driver's side of the glazing unit 2. Thus, the second temperature T2 may be measured at the location of the first face F4 where nucleation of condensation droplets 5 occurs preferentially during vehicle operation, which makes it possible to determine the presence of condensation more quickly and / or predict the nucleation of condensation droplets more accurately.

[0099] The second temperature sensor 10 may comprise a circuit configured to measure the resistance of the layer 15. Thus, the temperature of the first face F4 may be measured at the third point 11 where the layer 15 is arranged. In practice, the measured resistance depends on the temperature of the layer 15, which is substantially equal to the temperature of the first face F4. The layer 15 may have two ends according to the projection on the main surface 3. The resistance may be measured between the two ends. The glazing element 1 may comprise a voltage generator having a terminal electrically connected to the layer 15. The voltage generator may be configured to generate a voltage less than 10V, in particular less than 6V, and preferably between 1V and 5V, to measure the resistance of the layer 15 by limiting the temperature variation of the layer 15 driven by the resistance measurement. Preferably, the circuit is configured to measure the resistance of the layer 15 in less than one second, in particular less than 200μs, and preferably less than 20μs. The circuit may be equivalently configured to measure the resistivity of the layer 15, the conductance of the layer 15 and / or the conductivity of the layer 15.

[0100] Layer 15 may be formed by a strip formed of a conductive material or a semiconductor material, which is deposited on first face F4. The strip may be deposited on first face F4 by sputtering. Layer 15 may be transparent. The material may be selected from indium tin oxide and zinc oxide. Thus, layer 15 may be transparent in visible wavelengths and not hinder visibility of the driver through glass unit 2. Layer 15 may be doped with metal ions to increase the sensitivity of the resistance of layer 15 to temperature.

[0101] The glazing element 1 may be configured to control the increase in the temperature of the glazing unit 2. The glazing element 1 may include a voltage generator having two terminals electrically connected to the layer 15. The voltage generator is configured to generate a voltage greater than 10 V, in particular greater than 20 V, and preferably greater than 40 V. Thus, the temperature of the layer 15 and the temperature of the glazing unit 2 adjacent to the layer 15 may be increased by the Joule effect. This makes it possible to prevent the nucleation of condensation droplets 5 and / or to defog the glazing unit 2.

[0102] The control unit 12 may be configured to acquire the second temperature T2 via the second temperature sensor 10. The control unit 12 may be configured to control the increase of the temperature of the glazing unit 2 after determining the presence of condensation droplets 5 and / or predicting nucleation of condensation droplets 5 on the first face F4.

Claims

1. A glazing element (1) for a vehicle, the glazing element (1) comprising a glazing unit (2) extending along a main surface (3), the glazing unit (2) comprising a first glass sheet (4), the first glass sheet (4) having a first face (F4) capable of coming into contact with the surroundings of the vehicle interior and capable of supporting the nucleation of condensation droplets (5), It is characterized in that The glass product element (1) comprises: a first temperature sensor (6) configured to acquire a first temperature T1 of the surrounding environment at a first point (7) outside the glazing unit (2), a first distance d1 between the first point (7) and a point of the first face (F4) closest to the first point (7) being between 20 μm and 5 cm, a humidity sensor (8) configured to acquire the relative humidity RH of the surrounding environment at a second point (9) outside the glazing unit (2), a second distance d2 between the second point (9) and a point of the first face (F4) closest to the second point (9) being between 20 μm and 5 cm, An assembly comprising at least one second temperature sensor (10) configured to acquire a plurality of second temperatures T2 at third points (11) of said first face (F4) that are different from one another.

2. The glazing element (1) according to claim 1, comprising a control unit (12), the control unit (12) being configured to: - obtaining the first temperature T1 of the surrounding environment through the first temperature sensor (6), - obtaining the humidity level RH of the surrounding environment through the humidity sensor (8), - obtaining the plurality of second temperatures T2 by means of the component, - Determine the dew point T according to the first temperature T1 and the humidity level RH dp , - Comparing the dew point with a plurality of second temperatures T2.

3. The glass product element (1) according to claim 2, wherein: The control unit (12) is configured to dp Comparison with a plurality of said second temperatures T2 determines the presence of condensed liquid droplets on said first face (F4).

4. The glazing element (1) according to any one of claims 1 to 3, wherein: The first face (F4) comprises a detection surface (13), the detection surface (13) comprising the third point and extending along at least one element selected from the following elements: a side edge of the glass product unit (2), a side edge of the driver's side of the glass product unit (2), a lower side edge of the glass product unit (2), a corner of the glass product unit (2), and a lower corner of the driver's side of the glass product unit (2).

5. The glazing element (1) according to any one of claims 1 to 4, wherein: The second temperature sensor (10) is a photodetector configured to detect a light beam having a wavelength within an infrared wavelength range.

6. The glazing element (1) according to claim 5, wherein: The second temperature sensor (10) is an imager, the first face (F4) comprises a detection surface (13), and the imager is configured to image the detection surface (13).

7. The glazing element (1) according to claim 5 or 6, wherein: The photodetector comprises an infrared thermopile, the first face (F4) comprises a detection surface (13), the infrared thermopile is mounted on a support, the support is configured to orient the infrared thermopile towards each third point of the plurality of third points (11).

8. The glazing element (1) according to any one of claims 5 to 7, comprising a housing (14) configured to support a rearview mirror of the vehicle, the photodetector being arranged in the housing (14).

9. The glazing element (1) according to any one of claims 1 to 8, wherein: The assembly comprises a plurality of second temperature sensors (10), each second temperature sensor (10) being arranged in direct contact with the first face (F4).

10. The glazing element (1) according to claim 9, wherein: At least one of the second temperature sensors (10) comprises a layer (15) formed of an electrically conductive material and / or a semiconductor material, the layer (15) being in contact with the first face (F4).

11. The glazing element (1) according to claim 9 or 10, wherein: The second temperature sensor (10) comprises an electrical circuit configured to measure the resistance of the layer (15).

12. The glazing element (1) according to any one of claims 9 to 11, wherein: Said layer (15) is formed by strips of material deposited on said first face (F4), preferably said layer (15) is formed by strips of material deposited on said first face (F4) by cathode sputtering.

13. The glazing element (1) according to any one of claims 9 to 12, wherein: The layer (15) is transparent.

14. The glazing element (1) according to any one of claims 9 to 13, wherein: The conductive material and / or the semiconductor material is at least selected from indium tin oxide and zinc oxide.

15. The glazing element (1) according to any one of claims 9 to 14, comprising a voltage generator having two terminals connected to the layer (15), the generator being configured to generate a voltage greater than 10 V, in particular greater than 20 V, and preferably greater than 40 V.

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