CN210984927U - Vehicle glazing with transponder - Google Patents
Vehicle glazing with transponder Download PDFInfo
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- CN210984927U CN210984927U CN201921648656.9U CN201921648656U CN210984927U CN 210984927 U CN210984927 U CN 210984927U CN 201921648656 U CN201921648656 U CN 201921648656U CN 210984927 U CN210984927 U CN 210984927U
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Abstract
The utility model describes a vehicle window glass (1), vehicle window glass includes: a) a first glass substrate (7); b) transponder (2) having an antenna (4) and a control unit (3) for communicating with a reading device, wherein the control unit (3) comprises a memory (3) for storing identification data, characterized by spaced reflectors (5) assigned to the transponder (2) for increasing the antenna gain of the antenna (4).
Description
Technical Field
The invention relates to a vehicle glazing (Fahrzeugscheibe) having a transponder, to a method for producing the vehicle glazing and to the use of the vehicle glazing in a vehicle (Fortbewegungsmtel).
Background
Transponders are generally known which are located on objects, such as goods and goods, and which are read by means of a reading device having a transmitting and receiving unit, such transponders are used for identifying these objects and are usually part of an IDentification system (IDentification system).
The reliability in the case of reading out the identification signal is very important, and is therefore very important, for example, in the case of road traffic. Communication between a reading device and a mobile transponder with known radio technology problems of undesired reflection, absorption and shielding often leads to insufficient reading and writing results in communication with the respective transponder. Known readout systems, which often have the shape of a Gate (Gate) as follows, have the following drawbacks: the identification signal is sometimes not detectable on the basis of a slight signal strength, wherein the vehicle to be recorded and equipped with an RFID transponder travels through the gate.
DE 202016013938 a1 describes a vehicle device (fahrzeugvorticichtung) with an electronic identification and/or payment unit, which has an RFID unit. The RFID unit includes a read element and an output element. The reader is disposed in the vehicle interior and detects identification and/or payment information of the RFID chip. The detected identification and/or payment information is copied and copied into the output element. The output element is arranged on the outside of the vehicle and transmits the identification and/or payment information contactlessly to an external reading device. In addition to the high expenditure on electronics required, the read-out element must also be arranged externally on the vehicle and not shielded from the environment, so that undesired interactions with the environment can occur.
Disclosure of Invention
The invention is therefore based on the following tasks: a vehicle glazing with a transponder is provided, which has an improved communication quality.
This object is achieved by a vehicle pane according to the description below and a vehicle according to the description below. The preferred embodiment of the invention is reproduced below.
The invention therefore relates to a vehicle glazing comprising a first glass substrate (glass pane) and a transponder having at least one antenna and a control unit for communicating with a reading device, wherein the control unit comprises a memory for storing identification data, the control unit preferably being a semiconductor chip having a memory for storing the identification data, the control unit having not only the memory but also the antenna being able to be arranged on a substrate, the substrate may have a dielectric material which is connected to a surface of the glass substrate via an outer surface of the substrate, preferably by adhesive bonding, the vehicle glazing having at least one reflector assigned to the transponder, which is spaced apart from the transponder and is provided for increasing an antenna gain (antenna window) of the antenna, the specific position on or in the vehicle glazing being derived by the expression "assigned reflector" which is naturally assigned to the corresponding antenna position and which has to be dimensioned in order to achieve an effectäof reinforcement (verterbeld).
Furthermore, provision is made for: the transponder and the reflector can be arranged within a vehicle glazing.
In order to increase the antenna gain of a transponder on a vehicle glazing, the radiation is focused (b ü ndeln). the radiation of the antenna can be focused by means of the reflector in such a way that a higher antenna gain results, the reinforcement of the signal transmitted and received by the transponder which is achieved in this way can be measured particularly well, in particular, from a direction perpendicular to the surface of the vehicle glazing.
The substrate is very thin and transparent, so that the transponder on the vehicle window is less noticeable (auffällen).
According to a preferred embodiment of the invention, the reflector is designed as a transparent, electrically conductive coating having a region which is transparent to electromagnetic radiation in the frequency range of the antenna. This development is based on the recognition that many vehicle glazings have a transparent, electrically conductive coating. These transparent, electrically conductive coatings have a multiplicity of functionalities. For example, the electrically conductive coating can be used as a heating device for removing (befreien) moisture and ice from the vehicle window or for providing reflection of thermal radiation.
The transparent electrically conductive coating is preferably a functional coating, particularly preferably a functional coating having a sunscreen effect. The coating having a sun protection effect has reflection properties in the infrared range and thus in the incident range of the sun. The heating of the interior of the vehicle or of the building by the solar radiation is thereby advantageously reduced. Such coatings are known to the person skilled in the art and typically comprise at least one metal, in particular silver or an alloy containing silver. The transparent electrically conductive coating may comprise a sequence of a plurality of monolayers (Einzelschicht), in particular at least one metal layer and a plurality of dielectric layers, which for example comprise at least one metal oxide. The metal oxide preferably comprises: zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, and the like, as well as combinations consisting of one or more metal oxides thereof. The dielectric material may also comprise silicon nitride, silicon carbide, or aluminum nitride.
Such a layer configuration is generally obtained by a sequence of deposition processes, wherein the sequence is performed by vacuum methods, such as magnetic field-supported cathode sputtering (kathonzenrstäubung.) on both sides of the silver layer, very thin (fein) metal layers may also be provided, which contain, in particular, titanium or niobium.
Particularly suitable transparent electrically conductive coatings comprise at least one metal, preferably silver, nickel, chromium, niobium, tin, titanium, copper, palladium, zinc, gold, cadmium, aluminum, silicon, tungsten or alloys thereof and/or at least one metal oxide layer, preferably tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), fluorine-doped tin oxide (FTO, SnO)2F), antimony-doped tin oxide (ATO, SnO)2Sb) and/or carbon nanotubes and/or optically transparent electrically conductive polymers, preferably poly (3, 4 ethylenedioxythiophene), polysulfonylstyrene, poly (4, 4 dioctylcyclopentadithiophene), 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone, mixtures and/or copolymers thereof.
The thickness of the transparent, electrically conductive coating can vary widely (breit) and is adapted to the requirements of the individual case. The transparent electrically conductive coating preferably has a layer thickness of 10nm to 5 μm and particularly preferably of 30nm to 1 μm.
The surface resistance (Flächewildstand) of the transparent electrically conductive coating is preferably 0.35 to 200 ohm/square, preferably 0.5 to 200 ohm/square, particularly preferably 0.6 to 30 ohm/square and in particular 2 to 20 ohm/square, in particular in the case of applications requiring only a slight light transmission (L ichttransmission), the transparent electrically conductive coating can in principle have a surface resistance lower than 0.35 ohm/square, the transparent electrically conductive coating preferably also has good infrared reflection properties and/or a particularly low emissivity (L ow-E).
The transparent, electrically conductive coating has in common that it is also opaque to electromagnetic radiation in the high frequency range, the vehicle is glazed (Verglasung) on all sides and over the entire surface (vollflächic) with the transparent, electrically conductive coating, so that the transmission and reception of electromagnetic radiation in the interior space is no longer possible.
The transparent electrically conductive coating is suitably designed for use as a reflector and can extend at least over a part of the surface of the glass substrate or be integrated in an intermediate layer running parallel thereto.
The transponder or the orthogonally projected area of the transponder is arranged in a region of the transparent electrically conductive coating that is transparent to electromagnetic radiation in the frequency range of the antenna, in particular in the communication window. In other words, the region of the transparent electrically conductive coating that is transparent to electromagnetic radiation in the frequency range of the antenna overlaps the transponder in a vertical orientation with respect to the first glass substrate.
The region which is transparent to electromagnetic radiation is composed, depending on the frequency, of a circumference of only a few centimeters (Umkreis) around the transponder. In this advantageous embodiment, an additional production step is dispensed with, since the already present transparent electrically conductive coating can be used as a reflector.
The region that is transparent to electromagnetic radiation in the frequency range of the antenna can be designed as a coating-free region. The transponder is electrically insulated from the remaining transparent electrically conductive coating by the uncoated region for direct current. An uncoated region is a region in which the transparent electrically conductive coating has been removed, for example by a laser stripping or grinding process. This should be industrially particularly simple and inexpensive to implement.
Alternatively, the region that is transparent to electromagnetic radiation in the frequency range of the antenna can be produced by laser cutting, wherein the coating is not embodied over the entire surface in this region but rather has a rectangular grid, a diamond-shaped grid or a grid with an arbitrary shape, the grid being composed of a plurality of surface elements (Flächenelementen) that are independent of one another and each have a small dimension (Ausdehnng) or edge length with respect to the wavelength of less than one tenth of the wavelength, the maximum dimension, in particular the edge length, can be, for example, 1mm to 0.1 mm.
If the transparent electrically conductive coating and the transponder are arranged in one plane (Ebene), for example if the transponder is arranged on a substrate surface, wherein the transparent electrically conductive coating extends over the substrate surface, the transparent electrically conductive coating can surround the transponder.
In a further advantageous embodiment of the invention, the reflector can comprise a line conductor (L inienleiter), which can be embodied as a printed, electrically conductive paste, preferably a silver-containing screen-printed paste, or as an electrically conductive conductor, preferably consisting of a metal, and in particular of copper, silver, gold or aluminum.
The line conductor is operationally stable (rodabangabil) as a reflector and is fixed stably in the mounted (L. causing) condition on the vehicle window.
According to an advantageous further development of the invention, the reflector comprises two line conductors which are each arranged at the same distance from the transponder. It is therefore possible to provide a transponder with a reflector arrangement which can be produced particularly simply.
According to a further advantageous embodiment of the invention, the reflector can be designed as a metallic, in particular closed (geschlossen) ring. This has the advantage that the reflection can be additionally intensified depending on the transponder type.
According to an advantageous embodiment of the invention, the transponder operates in an energy-self-sufficient manner.
According to a further advantageous development of the invention, the transponder is an RFID transponder. UHF RFID transponders in particular have a semiconductor chip which is distinguished by its small size in relation to the antenna.
In a further embodiment of the invention, the transponder operates in a frequency range from 800MHz to 3GHz, preferably up to 2.45GHz, particularly preferably 860MHz to 930 MHz. The size of the antenna is generally related to the desired frequency band and the corresponding application.
It is furthermore proposed that: identification data for a marked-out (kennzeichniung) vehicle is set. This advantageously enables the allocation of transponders to vehicles.
According to a further advantageous embodiment of the invention, the first glass substrate is connected to the second glass substrate via a thermoplastic interlayer. Essentially all thermally and chemically stable and dimensionally stable electrically insulating substrates are suitable as glass substrates under the conditions of production and use of the vehicle glazing according to the invention. The transponder is preferably fixed on the inner side surface of the first glass substrate.
Alternatively, the transponder and/or reflector is disposed in the interlayer between the first and second glass substrates.
In a further advantageous embodiment of the vehicle glazing according to the invention, the transparent electrically conductive coating is present on at least one of the surfaces of the first and/or second glass substrate, in particular on the surface located inside. Alternatively, a transparent electrically conductive coating may be integrated in the intermediate layer. A transparent electrically conductive coating is then preferably applied to the carrier film. The carrier film preferably comprises a polymer, in particular polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), Polyurethane (PU), polyethylene terephthalate (PET) or a combination thereof.
The first and/or second glass substrate preferably comprises glass, particularly preferably planar glass, float glass, quartz glass, borosilicate glass, soda-lime glass (Kalk-Natron-Glas) or a transparent plastic, preferably a rigid transparent plastic, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof the first and/or second glass substrate is preferably transparent, in particular for applications in vehicles, for example as a windshield or rear window (R ü ckscheibe), or for other applications in which a high light transmission is desired, the substrate is then understood as transparent in the sense of the present invention, said substrate having a transmission in the visible spectral range of more than 70%, however, for vehicle windows which are not located in the driver's traffic-related field of vision, for example for roof windows, the transmission may also be much smaller, for example, greater than or equal to 5%.
In the case of vehicle glazing, the first and second glass substrates are connected to one another by at least one interlayer, the interlayer preferably being transparent, the interlayer preferably comprises at least one plastic, preferably polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA) and/or polyethylene terephthalate (PET), but the interlayer may also for example comprise Polyurethane (PU), polypropylene (PP), polyacrylate, Polyethylene (PE), Polycarbonate (PC), polymethyl methacrylate, polyvinyl chloride, polyacetal resin, cast resin (Gie bharz), acrylate, fluorinated ethylene-propylene, polyvinyl fluoride and/or ethylene-tetrafluoroethylene or copolymers or mixtures thereof.
The lamination, i.e. the joining of the first glass substrate and the second glass substrate by the interlayer, is preferably carried out under the influence of heat, vacuum and/or pressure. Methods known per se can be applied for the production of composite substrates (Verbundscheibe).
In a further advantageous embodiment, the vehicle window additionally has a peripheral frame-shaped coating-removal region having a width of 2mm to 20mm, preferably 5mm to 10 mm. This region contributes to the electrical insulation between the voltage-carrying cladding and the vehicle body. The surrounding frame-shaped coating-free region is preferably hermetically sealed by an intermediate layer as a vapor diffusion barrier or by an acrylate adhesive (hermetisch versiegeln). By means of the vapor diffusion barrier, the corrosion-sensitive coating is protected from moisture and atmospheric oxygen. In addition, the transparent electrically conductive coating can be removed in other regions, for example, as a data transmission window or a communication window. The transparent substrate is transparent to electromagnetic radiation and in particular infrared radiation in the other regions of the removal coating.
The vehicle glazing according to the invention is suitable for separating a vehicle interior from the outside environment. The reading device of the transponder is located in said external environment, shortly called external space, wherein the reading device is able to receive the signals of the transponder.
The thickness of the first and/or second glass substrate may vary widelyThe standard thickness for the vehicle glass application is 1.0mm to 25mm, preferably from 1.4mm to 2.5mm the size of the first glass substrate and/or of the second glass substrate can vary widely and depends on the size of the application according to the invention (Gr ö β e). the first glass substrate and/or the second glass substrate has, for example, 200cm in the vehicle structure2To 3m2The common area of (a).
The vehicle glazing may have any three-dimensional shape. Preferably, the three-dimensional shape does not have a shadow zone (Schattenzone), so that it can be coated, for example, by cathode sputtering. Preferably, the first glass substrate and the second glass substrate are planar or curved in a slight or strong manner in multiple directions or in one direction of the space. In particular, a planar substrate is used. The substrate may be colorless or colored.
In addition, the vehicle window pane has a conductor system with a heating function, which comprises an electrical resistance element arranged between current-carrying busbars and serving as a heating conductor. These heating conductors consist of resistance wires which extend vertically, substantially parallel to one another, said resistance wires having a diameter of about 20 to 200 μm, preferably 0.09mm (90 μm). These resistance wires are preferably laid in a wave-like manner at a mutual spacing of about 1mm to 5mm and extend substantially perpendicularly to the antenna of the transponder.
The vehicle glazing according to the invention is suitable for all vehicles, for example motor vehicles, trains, ships or aircraft, motor vehicles being particularly preferred. Examples for suitable motor vehicles are preferably buses, tractors, trucks and passenger cars, with passenger cars being particularly preferred.
In a preferred embodiment, the vehicle window is preferably a windshield, a roof window, a rear side window or a front side window in a motor vehicle.
The inventive combination of the described technical features results in a vehicle glazing in which the antenna gain of the transponder is optimized.
Another aspect of the invention includes a method for making a vehicle glazing, wherein at least:
a transponder having an antenna and a control unit is affixed to a surface of the first glass substrate, a surface of the second glass substrate, or between the first and second glass substrates for communication with the reading device, wherein the control unit has a memory for storing identification data; and
spaced apart reflectors assigned to the transponders are applied on the surface of the first glass substrate, on the surface of the second glass substrate or between the first and second glass substrates in order to increase the antenna gain of the antenna.
In an advantageous embodiment of the method according to the invention, the transponder is arranged on a substrate, wherein the substrate is connected to the surface of the glass substrate by means of bonding with an adhesive.
The invention furthermore comprises the use of a vehicle glazing according to the above, wherein the vehicle glazing is used in a vehicle for land, air or water traffic, in particular in a motor vehicle, for example as a windshield, side, rear and/or roof glazing.
The invention also relates to a vehicle comprising at least one vehicle glazing according to the invention, wherein the vehicle is preferably a motor vehicle.
The invention will be further elucidated on the basis of non-limitative embodiments with reference to the accompanying drawings.
Drawings
The present invention is set forth hereinafter and in the accompanying drawings. The drawings are not to scale. The invention is not limited in any way by the accompanying drawings. In the drawings, wherein:
FIG. 1a shows a plan view of a vehicle glazing according to the invention with a transponder;
FIG. 1b shows a top view of an alternative vehicle glazing according to the invention having a transponder;
fig. 2 shows an enlarged view of the segment in fig. 1 with a transponder;
FIG. 3 shows a cross-section along section line A-A' in FIG. 2;
fig. 4 shows an alternative configuration example of a vehicle glazing according to the invention with a transponder;
figure 5 shows a cross-sectional view of the vehicle glazing of figure 4;
fig. 6a shows a further alternative embodiment example of a vehicle glazing according to the invention with a transponder;
FIG. 6b shows a top view of another alternative vehicle glazing according to the invention having a transponder;
FIG. 7 shows an exemplary power diagram of a signal received by a transponder according to the present invention; and
fig. 8 shows a further exemplary power diagram of a signal received by a transponder according to the invention.
Detailed Description
Fig. 1a shows a plan view of a vehicle pane 1 according to the invention, the vehicle pane 1 being configured in this example as a windshield of a passenger car and being equipped with a transponder 2, the vehicle pane 1 having dimensions of, for example, 0.9m × 1.5.5 m, the transponder 2 being arranged in the rear lateral region of the vehicle pane 1, alternatively, the transponder 2 can be arranged at other locations of the vehicle pane 1, for example in the upper central region of the vehicle pane 1.
The transponder 2 is a so-called UHF RFID transponder (data carrier in the case of radio frequency identification) having an antenna 4 and a control unit 3 with a memory for storing identification data and for communicating with an external reading device (see fig. 2). if the transponder 2 is exposed to an electromagnetic alternating field (aussetzen), the transponder 2 transmits a personalized signal, i.e. the electromagnetic alternating field has to be modulated with a query signal (abbragagesignal). for reading of the transponder 2, an electromagnetic alternating field coordinated with the transponder 2 is generated by an external reading device.
The transponder 2 can be designed as an active transponder or as a passive transponder. A transponder 2 which is designed as active can receive the energy of the signal emitted by the transponder from a separate energy source which is assigned to the transponder 2. The passive transponder 2 extracts (beziehen) energy from the energy of the electromagnetic alternating field generated by the reading device in order to transmit the personalization signal. After the transponder 2 has transmitted a signal, it is received by a reading device which is external and which is present within the effective distance of the signal.
Fig. 1b shows a plan view of an alternative embodiment of the vehicle window pane from fig. 1. In contrast to fig. 1, the transponder 2 is arranged in the upper region of the vehicle window pane 1. This arrangement is particularly advantageous if the transponder is within the effective distance of the alternating field generated by the reading device and the reading device is arranged on the vehicle.
Fig. 2 shows an enlarged view of a segment of the vehicle glazing 1 according to the invention from fig. 1. The vehicle pane 1 comprises a transponder 2 and, for example, a transparent, electrically conductive coating 5.1 as a reflector 5 for increasing the antenna gain. The transparent electrically conductive coating 5.1 has a coating-free region 6. The uncoated area 6 has a rectangular shape with a length of 130mm and a width of 110 mm. The uncoated region 6 of the transparent electrically conductive coating 5.1 overlaps the transponder 2 in a vertical orientation with respect to the vehicle pane 1. The transponder 2 is arranged substantially centrally in the uncoated region 6. The radiation is thereby reflected by the transparent, electrically conductive coating 5.2. The bundling of the radiation results in an enhanced antenna signal.
The length and width of this uncoated region 6 correspond to the frequency range of the antenna 4. The antenna 4 may be a planar implemented antenna having a symmetrical, meander-shaped structure.
Alternatively, the region 6 that is transparent to electromagnetic radiation in the frequency range of the antenna is implemented by laser cutting. The transparent, electrically conductive coating 5.1 is then not removed over the entire surface in the region 6, but rather has a rectangular grid. The rectangular grid is composed of a plurality of rectangular elements (Rechteckelement) which are independent of one another and each have an edge length of less than one tenth of the wavelength of the electromagnetic radiation. The edge length can be, for example, 1mm to 0.5mm, the rectangle having a width of 0.1 mm.
Fig. 3 shows schematically in cross section a vehicle glazing according to the invention having a first outer glass substrate 7, an interlayer 8 and a second inner glass substrate 9. The interlayer 8 is a PVB film. Additional intermediate layers may additionally be arranged between the first glass substrate 7 and the glass substrate 9. These interlayers can have polyvinyl butyral, ethylene vinyl acetate, polyurethane and/or mixtures and/or copolymers thereof and can have a polymer film. Preferably, a layer of polyvinyl butyral (PVB) is applied, which has a film of polyethylene terephthalate (PET). Such an intermediate layer may have infrared reflective properties.
The second inner glass substrate 9 is, for example, arranged to face the interior of the vehicle in the installed position (einbauge), i.e. it has an inside surface IV which is accessible from the interior (zugänglich), relative to which the first outer glass substrate 7 points outwards with respect to the outside surface I of the interior of the vehicle, the first outer glass substrate 7 and the second inner glass substrate 9 are, for example, composed of soda-lime glass, the thickness of the second inner glass substrate 9 is, for example, 1.6mm and the thickness of the first outer glass substrate 7 is 2.1mm, it being obvious that the first inner glass substrate 7 and the second outer glass substrate 9 can also be configured, for example, to be of the same thickness, the intermediate layer 8 has a thickness of 0.76 mm.
The transponder 2 is arranged on the inner side surface IV of the second inner glass substrate 9. The transponder 2 is located in a region of the vehicle pane 1 in which an uncoated region 6 is arranged on the inner side surface II of the first outer glass substrate 7. The uncoated region 6 is thus situated opposite the transponder 2. This uncoated region 6 is transparent to electromagnetic radiation in the frequency range of the antenna 4, so that signals emitted by the antenna 4 from the vehicle interior space to the vehicle exterior space penetrate the second interior glass substrate 9 and the uncoated region 6.
In fig. 4, an alternative exemplary embodiment of the vehicle window pane 1 according to the invention in fig. 2 is shown, the transponder 2 being arranged in an intermediate layer 8 of the vehicle window pane 1, in contrast to fig. 2, the reflector 5 assigned to the transponder 2 is designed as an arrangement of two wire conductors 5.2, the transponder 2 being integrated in the intermediate layer 8 between the two wire conductors 5.2, the wire conductors 5.2 being arranged in each case at the same distance from the transponder 2, so that the transponder 2 is located centrally between the two wire conductors 5.2, the wire conductors 5.2 being electrical conductors consisting of metal wires, the length of the wire conductors 5.2 being determined by the frequency used of the alternating field and being shortened by the medium to approximately half a wavelength (L ambda/2 n), the wire conductors 5.2 each having a length of 16cm at the operating frequency of the transponder at 860 MHz.
Alternatively or additionally, the transponder 2 and/or the wire conductor 5.2 may be arranged on the inner side surface IV of the second inner glass substrate 9. The line conductor 5.2 then consists of a silver-containing screen printing paste which is applied to the vehicle glazing by baking or printing (Druck). The layer thickness of the baked silver paste is preferably 5 μm to 20 μm.
Figure 5 shows a cross-sectional view of the vehicle glazing of figure 4. In contrast to fig. 2, the transponder 2 and the reflector 5 assigned to the transponder 2 are arranged between a first outer glass substrate 7 and a second inner glass substrate 9. The reflector 5 consists of two wire conductors 5.2 which are arranged at the same pitch as the transponder 2.
In fig. 6a, an alternative configuration example of the vehicle glazing 1 according to the invention in fig. 4 is shown. In contrast to fig. 4, the transponder 2 and the reflector 5 are arranged on the inner side surface IV of the second inner glass substrate 9. The reflector 5 is designed as a metallic, closed ring 5.3. The metallic, closed ring is an electrical conductor consisting of a silver-containing screen-printed paste, which is applied to the vehicle glazing 1 by baking or printing.
Fig. 6b shows a plan view of an alternative embodiment of the vehicle pane 1 in fig. 6. In contrast to fig. 6, the transponder 2 and the reflector 5.3 are arranged in the upper region of the vehicle pane 1.
Fig. 7 shows an exemplary power diagram of the transponder 2 according to fig. 2. A signal, the so-called forward signal, has been transmitted by an external reading device and is received by the transponder 2 with the spaced apart assigned reflectors 5.1. The signal power has been detected at the transponder 2 and is shown as Graph (Graph) G1. As graph G2, a reference power has been measured in which a transponder without a reflector has been applied. It is clear that a transponder 2 with a reflector requires less signal power for receiving the forward signal. Thereby, the antenna gain is increased.
Fig. 8 shows an exemplary power diagram of the transponder 2 according to fig. 4. A signal, the so-called forward signal, has been transmitted by an external reading device and is received by the transponder 2 with the spaced apart assigned reflectors 5.2. The signal power has been detected at the transponder 2 and is shown as graph G1. As graph G2, a reference power has been measured in which a transponder without a reflector has been applied. It should be apparent here that the transponder 2 with the reflector requires less signal power for receiving the forward signal. Thereby, the antenna gain is increased.
The invention provides a vehicle glazing 1 in which the signal of a transponder 2 is intensified in a direction perpendicular to the surface of the vehicle glazing. In an advantageous embodiment of the invention, the increased antenna gain of the antenna 4 is achieved by a corresponding embodiment of the transparent, electrically conductive coating 5.1 as reflector 5 with the uncoated region 6 and the spaced-apart arrangement of the transponder 2 with the antenna 4. This is unexpected and surprising to those skilled in the art.
List of reference numerals
1 vehicle glazing
2 Transponder
3 control unit
4 aerial
5 Reflector
5.1 transparent electric coating
5.2 wire conductor
5.3 Ring
6 region permeable to electromagnetic radiation in the frequency range of the antenna
7 first outer glass substrate
8 intermediate layer
9 second inner glass substrate
I outer surface of the first outer glass substrate 7
II inner side surface of first outer glass substrate 7
III outside surface of second inner glass substrate 9
IV inside surface of the second inner glass substrate 9
Claims (17)
1. A vehicle glazing (1) comprising:
a) a first glass substrate (7);
b) a transponder (2) having an antenna (4) and a control unit (3) for communicating with a reading device, wherein the control unit (3) comprises a memory for storing identification data,
characterized by spaced reflectors (5) assigned to the transponders (2) for increasing the antenna gain of the antenna (4).
2. A vehicle glazing (1) according to claim 1, characterised in that the reflector (5) is constructed as a transparent electrically conductive coating (5.1) having a region (6) which is transparent to electromagnetic radiation in the frequency range of the antenna (4).
3. Vehicle glazing (1) according to claim 2, characterised in that the transponder (2) or the orthogonally projected face of the transponder (2) is arranged within the region (6) which is transparent to electromagnetic radiation in the frequency range of the antenna (4).
4. A vehicle glazing (1) according to any of claims 1 to 3, characterised in that the reflector (5) is configured as at least one wire conductor (5.2).
5. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the reflector (5) has two wire conductors (5.2) each arranged at the same distance from the transponder (2).
6. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the reflector (5) is configured as a metallic ring (5.3).
7. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the transponder (2) operates in an energy-self-contained manner.
8. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the transponder (2) is an RFID transponder.
9. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the transponder (2) operates in the frequency range 800MHz to 3 GHz.
10. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that identification data is provided for identifying a vehicle.
11. A vehicle glazing (1) according to any of claims 1 to 3 characterised in that the first glass substrate (7) is connected to the second glass substrate (9) via a thermoplastic interlayer (8).
12. A vehicle glazing (1) according to any of claims 1 to 3, characterised in that the vehicle glazing is an automotive glazing.
13. A vehicle glazing (1) according to claim 6, characterised in that the reflector (5) is constructed as a metallic, closed ring (5.3).
14. A vehicle glazing (1) according to claim 9 characterised in that the transponder (2) operates in the frequency range 800MHz to 2.45 GHz.
15. A vehicle glazing (1) according to claim 9 characterised in that the transponder (2) operates in the frequency range 860MHz to 930 MHz.
16. A vehicle, characterized in that it comprises a vehicle glazing (1) according to any one of claims 1 to 15.
17. The vehicle of claim 16, wherein the vehicle is an automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648656.9U CN210984927U (en) | 2019-09-30 | 2019-09-30 | Vehicle glazing with transponder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921648656.9U CN210984927U (en) | 2019-09-30 | 2019-09-30 | Vehicle glazing with transponder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210984927U true CN210984927U (en) | 2020-07-10 |
Family
ID=71418923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921648656.9U Active CN210984927U (en) | 2019-09-30 | 2019-09-30 | Vehicle glazing with transponder |
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| CN (1) | CN210984927U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018511A (en) * | 2020-08-13 | 2020-12-01 | 安徽精卓光显技术有限责任公司 | Car networking antenna and wireless communication device |
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2019
- 2019-09-30 CN CN201921648656.9U patent/CN210984927U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018511A (en) * | 2020-08-13 | 2020-12-01 | 安徽精卓光显技术有限责任公司 | Car networking antenna and wireless communication device |
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