GLAZED ELEMENT COMPRISING A SYSTEM FOR PREDICTING AND/OR DETECTING CONDENSATION
A glazed element for a vehicle, includes a glazed unit extending along a main surface, a first temperature sensor of the ambient environment at a first point outside the glazed unit, a humidity sensor arranged to acquire a relative humidity of the ambient environment and an assembly including at least a second temperature sensor, the assembly being configured to acquire a plurality of second temperatures at third points of the first surface different from one another.
1 . A glazed element for a vehicle, comprising a glazed unit extending along a main surface, the glazed unit comprising a first sheet of glass, the first sheet of glass having a first face, the first face being able to be in contact with an ambient environment inside the vehicle and to support nucleation of a condensation droplet, the glazed element comprising:
a first temperature sensor configured to acquire a first temperature of the ambient environment at a first point outside the glazed unit, a first distance d-between the first point and a point of the first face closest to the first point being between 20 μm and 5 cm,
a humidity sensor configured to acquire a relative humidity RH of the ambient environment at a second point outside the glazed unit, a second distance de-between the second point and a point of the first face closest to the second point being between 20 μm and 5 cm,
an assembly comprising at least one second temperature sensor, the assembly being configured to acquire a plurality of second temperatures at third points of the first face different from each other.
2 . The glazed element according to claim 1 , comprising a control unit configured to:
acquire the first temperature of the ambient environment by the first temperature sensor,
acquire the humidity level RH of the ambient environment by the humidity sensor,
acquire the plurality of second temperatures by the assembly,
determine a dew point from the first temperature and from the humidity level RH,
compare the dew point to a plurality of second temperatures.
3 . The glazed element according to claim 2 , wherein the control unit is configured to determine a presence of a condensation droplet on the first face from a comparison of the dew point to the plurality of second temperatures.
4 . The glazed element according to claim 1 , wherein the first face comprises a detection surface, the detection surface-comprising the third points and running along at least one element selected from a lateral edge of the glazed unit, a lateral edge on the driver's side of the glazed unit, a lower lateral edge of the glazed unit, a corner of the glazed unit and a lower corner on the driver's side of the glazed unit.
5 . The glazed element according to claim 1 , wherein the second temperature sensor is a photodetector configured to detect a light beam having a wavelength in the infrared wavelength range.
6 . The glazed element according to claim 5 , wherein the second temperature sensor is an imager, the first face comprising a detection surface, the imager being configured to image the detection surface.
7 . The glazed element according to claim 5 , wherein the photodetector comprises an infrared thermopile, the first face comprising a detection surface, the infrared thermopile being mounted on a support configured to orient the infrared thermopile towards each of the third points of the plurality of third points.
8 . The glazed element according to claim 5 , comprising a housing configured to support a rearview mirror of the vehicle, the photodetector being arranged in the housing.
9 . The glazed element according to claim 1 , wherein the assembly comprises a plurality of second temperature sensors, each second temperature sensor being arranged in direct contact with the first face.
10 . The glazed element according to claim 9 , wherein at least one of the second temperature sensors comprises a layer formed in an electrically conductive and/or semiconductor material, the layer being in contact with the first face.
11 . The glazed element according to claim 9 , wherein the second temperature sensor comprises an electrical circuit configured to measure an electrical resistance of the layer.
12 . The glazed element according to claim 9 , wherein the layer is formed by a strip of the material deposited on the first face.
13 . The glazed element according to claim 9 , wherein the transparent layer.
14 . The glazed element according to claim 9 , wherein the electrically conductive and/or semiconductive material is at least chosen from indium-tin oxide and zinc oxide.
15 . The glazed element according to claim 9 comprising a voltage generator having two terminals connected to the layer, the voltage generator being configured to generate a voltage greater than 10 V.
16 . The glazed element according to claim 12 , wherein the material is deposited on the first face by cathode sputtering.
17 . The glazed element according to claim 15 , wherein the voltage is greater than 20 V.
18 . The glazed element according to claim 17 , wherein the voltage is greater than 40 V.