DE202018006225U1 - glazing unit - Google Patents

Abstract

Glazing unit (1; 1 ') of a vehicle (11) or building, having a first inner or outer surface of a glass pane (3a, 3b; 3') and a second inner or outer surface of a glass pane (3a, 3b; 3 '), wherein the first surface carries a first sensor (7a; 7a ') oriented to directionally sense a physical quantity to the outside of the glazing unit and the second surface carries a second sensor (7b; 7b') for directionally sensing the physical quantity which faces the inside of Glazing unit is aligned, and wherein the first and second sensor in each case on its side facing away from the respective sensing direction, a shield (9a, 9b, 9a ', 9b') is associated.

Description

The invention relates to a glazing unit of a vehicle or building having a first inner or outer surface of a glass sheet and a second inner or outer surface of a glass sheet, the first surface carrying a sensor oriented to directionally sense a physical quantity to the outside of the glazing unit and the second Surface carrying a second sensor for directionally sensing the physical size, which is aligned to the inside of the glazing unit. It further relates to a detection arrangement for detecting a physical quantity on the inside and outside of a vehicle or building window or in the immediate vicinity.

In motor vehicles and buildings, the detection of conditions or parameters of the environment plays an increasingly important role in safe and efficient operation. Modern cars as well as high-end buildings are therefore equipped with a variety of sensors that detect relevant environmental conditions or parameters and provide the current values to processing and control units that control functions of the vehicle or building. Incidentally, this applies not only to motor vehicles, but to some extent also to certain vessels.

Certain sensors can advantageously be accommodated on or in the windshield or possibly also the rear window or a glass roof unit of a car. Corresponding arrangements have long been known for so-called. Rain sensors, are controlled by the wiper functions of the vehicle. As part of the general trend towards largely complete prefabrication of vehicle components, there are developments aimed at integrating corresponding sensors in a prefabricated glazing unit (such as front or rear window) of a vehicle. Corresponding solutions are in the unpublished European Patent Application No. 17192877.3 mentioned. By the way, vehicle windows with integrated or partially integrated sensors are made of EP 2 121 308 B1 or the CN 101 087 135 A known.

Based on the prior art, it is an object of the invention to provide a glazing unit of the type mentioned, with a higher validity and reliability of the information obtained with the built-sensor can be achieved. Furthermore, a correspondingly improved detection arrangement is to be provided.

This object is achieved with regard to the glazing unit by a glazing unit having the features of claim 1 and with respect to the detection arrangement by a detection arrangement having the features of claim 13. Advantageous further developments of the inventive concept are the subject of the respective dependent claims.

In the context of the invention, a "glazing unit" in the most general sense means a product which can be used for closing window openings of a vehicle or building directly (frameless) or after insertion into a suitable frame. In modern motor vehicles, this will usually be laminated glass and in new buildings in central and northern latitudes to glazing, but the invention is not limited to such. Rather, it can also be used in simple single-pane glazing units or multi-pane glazing units, which have a special structure, such as glazing units for armored vehicles or explosion-proof rooms. The panes of the glazing unit also need not necessarily be made of glass, but at least a part thereof may be made of a transparent plastic such as polycarbonate.

In the context of the invention, a sensor is to be understood in the general sense to mean a device which is designed and used for obtaining information about a physical quantity outside or inside the vehicle or building. Practically important is the design as a capacitive sensor and its use as a moisture or "rain" sensor, but it can also be, for example, optical sensors or chemo-sensors or similar. act, which serve to detect states or physical quantities that are relevant to the operation of the corresponding vehicle or building. This may be, for example, information about the degree of soiling of the front or rear window of a car, photometric data for determining possible glare of the driver or even statements about air pollution in the environment of the vehicle, which trigger appropriate control operations to protect the vehicle occupants or for the safe operation of the vehicle under critical conditions.

The invention includes the idea of carrying out the sensors integrated into the glazing unit in such a way that it receives signals for qualitatively or quantitatively determining the respective relevant size both externally and internally, ie an outwardly directed first sensor and an inwardly aligned second one Sensor includes. It further includes the idea of disposing the first sensor on a first (inner or outer) glass surface of the glazing unit and the second sensor on a second glass surface thereof.

Furthermore, the invention includes the idea of assigning both the first and the second sensor in each case a shielding device that shields him from signals that do not come from its detection direction and therefore are to be regarded as interference signals. Still further belongs to the invention of the idea, the shield for the first sensor on the o.a. second glass surface and the shield for the second sensor to provide on the first glass surface. The concrete position on the respective glass surface results from the term "shielding" in that it must of course be assigned to the respective sensor position and must be adequately dimensioned to achieve a shielding effect.

In one embodiment of the invention, the glazing unit is configured as a laminated glass pane having first and second glass sheets and a polymer film bonded between them, the first sensor and the second sensor shielding on the inner surface of the first pane and the second sensor and shielding first sensor are arranged on the inner surface of the second disc. Similarly configured is a further embodiment, especially for building glazings, in which instead of a polymer film between a first and second glass pane an evacuated or gas-filled space is present.

In another embodiment of the glazing unit according to the invention, the first sensor and the shield of the second sensor are arranged on a first surface of a glass pane of the glazing unit and the second sensor and the shield of the first sensor on the second surface of the same glass pane. In particular, this may be a single-pane glazing unit, with the first sensor and the shield of the second sensor on the first surface and the second sensor and the shield of the first sensor on the second surface of the individual glass pane.

In presently preferred embodiments of the sensor system, the first sensor is designed and aligned such that its sense direction is normal to the first inner or outer surface or centered about a normal thereof and the second sensor is designed and aligned so that its sensing direction is opposite to the sensing direction of the sensor first sensor or is centered about an opposite direction.

In a practically particularly important embodiment, the first and second sensors are designed as capacitive sensors for sensing moisture on the inside and outside of the glazing unit or in their respective surroundings.

In further embodiments, the first and second sensor may be formed as optical sensors, or for detecting contamination on the inner or outer surface of the vehicle or building windows or for detecting a photometric size inside or outside of the vehicle or building. Such a sensor system may be useful, for example, for the automatic control of windscreen cleaning processes or transmission control devices for protecting the driver and the occupants of a vehicle against glare or unfavorable strong solar radiation. Similar functions can basically also be provided in the building services of a modern building and relate their signals from a glazing unit according to the invention.

In yet another embodiment of the invention, the first and second sensors are designed as chemo-sensors for detecting the presence of at least one chemical compound on the inside or outside of the vehicle or building window or a gaseous chemical compound in their immediate vicinity. Here too, use is possible both in vehicle construction and in principle in construction and in building technology, and in this case the obtaining according to the invention of comparative statements about the values of the relevant size in the interior or exterior is particularly useful for control purposes.

In yet another embodiment, the first and second sensors are touch sensors that can detect whether a glazing unit or a particular area thereof is being touched or pressurized from outside or from inside. In order to achieve a reliable inner / outer discrimination, the proposed shielding in the opposite direction of the detection direction can also be useful here.

From a technological point of view, an embodiment may be considered advantageous in which the first sensor and the shield of the second sensor and / or the second sensor and the shield of the first sensor are each formed with a single conductive layer on the first or second inner or outer surface ,

As an embodiment thereof, but in principle also independent of the provision of only a single conductor layer on the respective glass surface, a further embodiment is designed such that the first and / or second sensor and / or the Shielding of the first sensor and / or the shield of the second sensor has a printed on the respective inner or outer surface conductor structure. Alternatively, it may be provided that a corresponding conductor structure is prefabricated in the manner of a printed circuit board (possibly on a transparent support) and adhered to the respective glass surface. In particular, the conductor structure of the first and / or second sensor and / or the shielding of the first and / or second sensor can be made transparent at least in sections for visible light.

The detection arrangement according to the invention comprises, in addition to a glazing unit of the type and embodiments described above, a differential evaluation unit having two inputs connected to the first sensor and second sensor and a processing stage comprising the signals of the first and second sensors for obtaining a qualitative one or quantitative statement about the physical size processed on the inside and outside.

Such a detection arrangement advantageously makes it possible to provide accurate and reliable information about a relevant physical quantity, specifically taking into account their values both in the interior and exterior of the vehicle or building and thus the differentiated and flexible control of functions of the vehicle or building, and It is technologically efficient and inexpensive to produce.

A broad application will obtain such a detection arrangement from the current point of view, if the first and second sensor are designed as capacitive sensors and the differential detection device is designed to obtain a statement about the external or internal moisture at / in the vehicle or building. Perspectively, however, the sensor types mentioned above and the detection arrangements formed with them appear to be very promising.

• 1 eine erste Ausführungsform der erfindungsgemäßen Verglasungseinheit in einer schematischen Querschnittsdarstellung;
• 2 eine zweite Ausführungsform der erfindungsgemäßen Verglasungseinheit in einer schematischen Querschnittsdarstellung;
• 3 eine schematische Darstellung einer Ausführungsform der erfindungsgemäßen Nachweisanordnung in Art eines Blockschaltbildes.

Incidentally, advantages and expediencies of the invention will become apparent from the following description of exemplary embodiments of the invention with reference to the figures. From these show:

• 1 a first embodiment of the glazing unit according to the invention in a schematic cross-sectional view;
• 2 a second embodiment of the glazing unit according to the invention in a schematic cross-sectional view;
• 3 a schematic representation of an embodiment of the detection arrangement according to the invention in the manner of a block diagram.

1 shows schematically in a cutout view designed as a laminated glass pane glazing unit 1 , as it can be used as windshield unit of a car application. The glazing unit 1 comprises a first (outer) glass pane 3a and a second (inner) glass pane 3b and a PVB sheet glued in between these (not separately designated adhesive layers) 5 ,

In the area shown is the glazing unit 1 provided with a sensor unit, the one for sensing moisture on the outside of the outer pane 3a aligned first capacitive sensor 7a and one for sensing inside moisture (fogging) on the surface of the inner glass panel 3b aligned second capacitive sensor 7b includes. The sensors or sensor components 7a . 7b are shown here purely symbolically. Since such capacitive humidity sensors have long been known and in mass use, they are known in the art in detail and therefore need not be described in more detail here.

In the figure it can be seen that the first and second sensor 7a . 7b each between a surface of the PVB film 5 and the inner surface of the adjacent glass sheet 3a respectively. 3b are arranged. In practice, the sensors typically have printed or glued-on conductor structures printed on the respective glass surface. Depending on the specific embodiment of the glazing unit with integrated sensors, the conductor tracks can be made at least partially transparent, for example, from ITO (indium tin oxide) or transparent metallic silver layers or conductive polymers.

The first sensor 7a Opposite and covering the surface of the sensor is on the inside of the second pane of glass 3b a first shield electrode 9a attached, and corresponding thereto is opposite to the second sensor 7b and its surface completely covering on the inside of the first glass pane 3a a second shield electrode 9b educated. The shielding electrodes 9a . 9b are formed as closed conductor surfaces (possibly also made of transparent material) and shield the respective opposite sensor 7a respectively. 7b in the direction opposite to his sense of direction from. So prevents the first shielding electrode 9a in that to the outwardly directed first sensor 7a Interference signals from the interior of the vehicle pass, and the second screen shielding shields analog 9b the second sensor aligned within the vehicle 7b from the outside of the vehicle and especially from the outside surface of the glazing unit 1 originate.

It should be noted that the above specification of the sensors 7a . 7b is merely exemplary and the provision of each associated Abschirmelektroden or surfaces may also be useful for capacitive sensors with other detection function and, more generally, for other types of sensors that have a preferred detection direction, but sensitive to noise from the opposite direction or anyway from the opposite side of the glazing unit.

2 shows a comparison with the first embodiment modified embodiment, in a single-pane glazing unit 1' as can be used in vehicle construction for side windows or in building technology, for example in interior windows of buildings or in outer panes of buildings in subtropical or tropical regions. The glazing unit 1' here includes a single pane of glass 3 ' , and on whose two surfaces are sensors 7a ' . 7b ' and shielding electrodes 9a ' and 9b ' applied with the above-mentioned functions or specifications.

3 schematically shows that a glazing unit 1 the in 1 shown type with integrated sensors 7 in a vehicle 11 together with a differential evaluation unit 13 a moisture-proofing arrangement 15 forms. The order of proof 15 is the output side with a wiper control unit 17 connected, which in dependence on the detected moisture signals in a conventional manner, the wipers 19 of the vehicle 11 controls.

The practice of the invention is not limited to the examples and highlighted aspects set forth herein, but is also possible in a variety of modifications, which are within the scope of the appended claims.

LIST OF REFERENCE NUMBERS

1; 1'

glazing unit

3a, 3b; 3 '

pane

5

PVB sheet

7

sensors

7a, 7b; 7a ', 7b'

first and second sensor

9a, 9b; 9a ', 9b'

shield

11

vehicle

13

Differential evaluation unit

15

detection arrangement

17

A wiper control unit

19

windshield wipers

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 17192877 [0003]
• EP 2121308 B1 [0003]
• CN 101087135 A [0003]

Claims (15)

Glazing unit (1; 1 ') of a vehicle (11) or building, having a first inner or outer surface of a glass pane (3a, 3b; 3') and a second inner or outer surface of a glass pane (3a, 3b; 3 '), wherein the first surface carries a first sensor (7a; 7a ') oriented to directionally sense a physical quantity to the outside of the glazing unit and the second surface carries a second sensor (7b; 7b') for directionally sensing the physical quantity which faces the inside of Glazing unit is aligned, and wherein the first and second sensor in each case on its side facing away from the respective sensing direction, a shield (9a, 9b, 9a ', 9b') is associated. Glazing unit (1, 1 ') according to Claim 1 , designed as a laminated glass pane (1), which has a first and second glass pane (3a, 3b) and a polymer film (5) glued in between, the first sensor (7a) and the shield (9b) of the second sensor (7b) the inner surface of the first glass sheet (3a) and the second sensor (7b) and the shield (9a) of the first sensor are disposed on the inner surface of the second glass sheet (3b). Glazing unit (1, 1 ') according to Claim 1 in which the first sensor (7a ') and the shield (9b') of the second sensor (7b ') are arranged on a first surface of a glass pane (3') of the glazing unit (1 ') and the second sensor and the shield (9a') of the first sensor are disposed on the second surface of the same glass sheet. Glazing unit (1, 1 ') according to Claim 3 implemented as a single-pane glazing unit (1 '), wherein the first sensor (7a') and the shield (9b ') of the second sensor (7b') on the first surface and the second sensor and the shield (9a ') of the first Sensors are arranged on the second surface of the individual glass pane (3 '). A glazing unit (1; 1 ') according to any one of the preceding claims, wherein the first sensor (7a; 7a') is formed and oriented so that its sensing direction is normal to the first inner or outer surface or to a normal thereof and the second sensor (7b; 7b ') is formed and oriented so that its sensing direction is opposite to the sensing direction of the first sensor or centered about an opposite direction. The glazing unit (1; 1 ') according to one of the preceding claims, wherein the first and second sensors (7a, 7b; 7a', 7b ') act as capacitive sensors for sensing moisture on the inside and outside of the glazing unit (1; ) or in their respective environment are formed. Glazing unit (1, 1 ') according to one of Claims 1 to 5 wherein the first and second sensors are designed as optical sensors, or for detecting contamination on the inner or outer surface of the vehicle or building window or for detecting a photometric size inside or outside of the vehicle or building. Glazing unit (1, 1 ') according to one of Claims 1 to 5 wherein the first and second sensors are formed as chemo-sensors for detecting the presence of at least one chemical compound on the inside or outside of the vehicle or building window or a gaseous chemical compound in their immediate vicinity. Glazing unit (1; 1 ') according to one of the preceding claims, wherein the first sensor (7a; 7a') and the shield (9b; 9b ') of the second sensor (7b; 7b') and / or the second sensor and the shield of the first sensor are each formed with a single conductive layer on the first and second inner or outer surface. Glazing unit (1; 1 ') according to one of the preceding claims, wherein the first and / or second sensor (7a, 7b; 7a', 7b ') and / or the shield (9a, 9b; 9a', 9b ') of the first Sensor and / or the shield of the second sensor has printed on the respective inner or outer surface conductor structure. Glazing unit (1; 1 ') according to one of the preceding claims, wherein the first and / or second sensor (7a, 7b; 7a', 7b ') and / or the shield (9a, 9b; 9a', 9b ') of the first Sensor and / or the shield of the second sensor has a bonded to the respective inner or outer surface conductor structure. Glazing unit (1, 1 ') according to Claim 10 or 11 wherein the conductor structure of the first and / or second sensor (7a, 7b; 7a ', 7b') and / or the shield (9a, 9b; 9a ', 9b') of the first and / or second sensor at least partially for visible light is transparent. Detection arrangement (15) for detecting a physical quantity on the inside and outside of a vehicle (11) or building window or in its immediate vicinity, comprising: - a glazing unit (1; 1 ') according to one of the preceding claims for forming the vehicle or building windows and - a differential evaluation unit (13) having two inputs connected to the first sensor (7a; 7a ') and second sensor (7b; 7b') and summing the signals of the first and second sensors to obtain a qualitative or quantitative one Statement about the physical size processed on the inside and outside. Detection arrangement (15) according to Claim 13 , wherein the first and second sensor (7a, 7b, 7a ', 7b') are designed as capacitive sensors and the differential detection device (13) for obtaining a statement about the external or internal moisture at / in the vehicle (11) or Building is formed. Vehicle (11) with a detection arrangement (15) according to Claim 13 or 14 ,

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