SE522955C2 - Radio signal transmission arrangement for transmitting information signals using one or more wave-guides in radio equipment connected to transmission arrangement in vehicles - Google Patents

Abstract

A vehicle is provided with duct branches (2-6), at least one of which acts as a microwave signal wave-guide with the corresponding connections to provide outlets and inputs for the radio waves or microwaves, i.e. for radio equipment parts (12,31) that can be connected via a radio connection and/or line connection (33). Mobile units (43,46) can be connected via radio connections (45,47) and radio parts can also be fitted to the engine parts and to the seats.

Description

20 25 30 01 t \> | \> Q) 01 01 h) reduction of cabling, etc. The invention is intended to solve all or parts of this problem.

There is also a need to be able to reduce the emitted radiation from mixed radio equipment and the transmission between them, at the same time as there should be a desire for simple connection functions. It must also be possible to meet the requirement for increased bandwidths and increased effects in the electronic systems. Mechanically high strength must also be present, as well as that insensitivity to disturbances is a prominent desire. The technical structure as such must also be safe and adjustments and additions must be easy to make in made installations. Several units in close proximity to each other, e.g. in a car compartment or a room. Wants to simultaneously use the space in the air, whereby everyone has access to a very limited bandwidth. In the mentioned compartments and premises, problems can arise with re-reflecting radio signals, so-called multipath, which is received with a time delay that seems disruptive. The invention intends to solve all or parts of this problem.

What can mainly be considered to be characteristic of a device according to the invention is e.g. that the connection arrangement comprises first connections assigned to the radio equipment or equipment and that other connections are provided for additional functional equipment or equipment which is separate (aa) in relation to the information signal handling part of the radio equipment or equipment.

A preferred embodiment of the inventive idea comprises that said further functional equipment or equipment operates with air or gas and uses one or more waveguides of said waveguide for internal transport of the air or gas. In an alternative embodiment, said further functional equipment can work with liquid, e.g. oil or water. In addition, the relevant waveguide can work with conventional electrical power transmission and utilize electrical cables that are applied to one or more of said waveguides. 10 15 20 i: 25 '= so 01 ha N: vb CH (in UJ In a further embodiment, the waveguide or the waveguides can be arranged in a vehicle, eg car, truck, bus, etc. or in a building. The respective waveguides provide a flow-through function for the air, gas and / or liquid selected in relation to the frequency with which the radio equipment operates during the information signal transmission, in the case of electrical conductors or wires (conventional ones) these can be applied to the housing, outside or inside. The waveguide or waveguides are arranged to be able to work with a low degree of efficiency when it comes to the transmission of the microwaves and the system as such with associated radio equipment or radio equipment parts can allow a total power loss of up to about -40 dB. in the floor, chassis and body and in such a way that the sockets for the information signals are located in the vicinity of the tive the hearing and speech organs of the speakers and at other electronic devices where information is exchanged in the vehicle or premises. In a preferred embodiment, the waveguide is double utilized for said microwaves / radio information signals and for air transport in or for the air conditioning system in the vehicle. The dissipation of the microwaves and air / gas can take place by means known per se with regard to the waveguide system as such. Grids that prevent the transfer of microwaves can enable the flow of air / gas or liquid. Side outlets can be arranged for outflow of air / gas or liquid, respectively, but are assigned positions in the node or nodes of the standing waves that prevent the exit of the microwaves via the recess, etc. In a further embodiment, the radio equipment or radio equipment parts in question are included in a CAN system, and the said equipment and parts are also cooperable with a superior system, e.g. the public data / telecommunications network.

Further embodiments appear from the following subclaims.

Through the above proposed, different functions can be integrated in the same unit even though the functions can be substantially widely separated. Great freedom is offered with technically simple and unambiguous connection means (sockets / slots, horns, etc.) and the electromagnetic radiation emitted to the environment can be kept down at low values. There are no special accuracy requirements for the design of the waveguide, which contributes to large simplifications 10 15 20 25 30 cn h.) H.) ND cn (JH 42- and cheaper during installation. connection to vehicles (cars, lorries, buses, etc.) and service functions to them, especially for cars and buses, it will be appropriate to use the waveguide and the waveguides in the bottom plate of the vehicle and branch or arrange waveguides in the chassis or body parts, e.g. eg at sides and ceilings, etc.

A presently proposed embodiment of a device having the characteristics characteristic of the invention will be described below with simultaneous reference to the accompanying drawings, in which: Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 in horizontal view showing in principle an arrangement in connection with a car, bus, truck, etc. and where the ventilation system and the radio signal transmission are integrated in a common waveguide or channel / channels, in side view and in principle show a system or arrangement in accordance with figure 1, used / id certain variations introduced on the equipment in question, in side view and in principle, shows a waveguide with first and second connections for radio equipment and sources and sockets for media to be transported or to be moved inside the waveguide's interior, e.g. media in the form of air, gas, water, oil or other liquid, in vertical section shows a waveguide arranged in a building or room / room at this and its upper parts, in vertical section shows an arrangement for waveguides separate from the arrangement according to figure 4 which in rooms, rooms, etc. transmits radio waves / microwaves and media in the form of air, gas and / or liquid, in cross section shows a first embodiment of a waveguide design, 10 15 20 25 30 ñgur 7 figure 8 figure 9 figure 10 figure 1 1 figure 12 figure 13 ur gur 14 figure 15 UH h) h) u) m 01 Um in cross section shows a second embodiment of a waveguide design, in cross section a third embodiment shows a waveguide, in long view shows parts of a casing in a waveguide, in side view and in principle shows a socket for radio waves / microwaves, in longitudinal view and in principle shows a stop means in the form of a grid which prevents the radio waves or microwaves from being diverted, but which allows diversion of the media in question, in side view show r re fl ector arrangement inside the waveguide, in longitudinal view and in principle shows a bend or bend at the waveguide, in longitudinal view shows emission from the waveguide to the surroundings of electromagnetic radiation, and in side view shows waveguides with integrated power supply function, ie. integrated power supply conductors, for the radio equipment in question, a media pump, an electric motor, etc.

Figure 1 shows in principle with 1 parts of a vehicle, which can be a passenger car, a bus, a truck, etc. In the present exemplary embodiment, the vehicle is provided with a duct system with duct branches 2, 3, 4, 5 and 6. The duct system or its various branches may be located respectively located wholly or partly inside the vehicle and wholly or partly outside the vehicle. The channel system is then designed so that at least one of the said branches, e.g. branch 2 forms or consists of a waveguide for microwave signals. Other branches in the system may consist of waveguides or consist of transport channels for other purposes. In the present case it is assumed that the different channels or channel branches consist of waveguides. In accordance with the idea of the invention, each waveguide must be of the type that transmits or works with microwaves or radio waves. The waveguide 2 is provided with first connections for radio or microwaves. In Figure 1, the first connections have been shown with the designations 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 and 21.

Said first connections may be of the same or different types depending on the information to be transmitted to and from the waveguide or waveguides. The first connections can consist of per se known connections (sockets, inlets). The waveguides also comprise other connections 22, 23, 24, 25, 26, 27, 28 and 29. Said first and second connections are of the type that the connections for the radio waves allow confinement of the medium at the respective place in the waveguide system so that the media in question does not leak. out at the outlet or inlet for the radio / microwaves in question. Such outlets may consist of plastic discs, plastic plugs, or plugs of material that prevents media penetration but allows the insertion or removal of the radio waves or microwaves. The other connections are of the kind where forwarding, discharge, introduction can take place by the media in question, but where no exit or entry into the waveguide can take place for the radio waves and the microwaves, respectively. The first and second connections can be integrated per se and as an example thereof reference is made to the first connection 7 which may also comprise a second connection 30, wherein said separating function between the radio signals / microwaves and the medium is performed. The first connections can be connected to units included in the radio equipment which communicate in a manner known per se with the connection via transmitter and receiver and for this purpose have antenna arrangements.

So e.g. the radio equipment part 12 can be connected to a radio equipment part 31, whereby the connection can take place via a radio connection 32 and / or wiring connection 33. The radio equipment part can in turn be connected via a radio connection 34 to a CAN system shown in principle which comprises nodes 36, 37, 38, 39 which are connected to each other via a connection, e.g. a digital bus connection or low-speed serial connection. In the case of the CAN system itself, reference is made to the prior art. Said nodes, e.g. the node 39 can be connected to a mobile node or unit 41. The connection of the unit 31 to the CAN system takes place via the node 36. The radio equipment part 12 can also be connected to the public data and / or telecommunication network (cf. Internet, Bluetooth system, etc. .). The connection of the unit can take place to mobile units, one of which is symbolized by 43. This mobile unit can be connected to the public network, e.g. the fixed public network symbolized by 44. The connection is made wirelessly in a manner known per se via the radio connection 45. The mobile unit can also be connected to other mobile units 46, such connections being symbolized by 47. The external systems can be part of the service and / or monitoring system for the vehicle in question. The systems can also be connected to parts or all of the traffic device or traffic device part in which the vehicle is to operate. Thus, the external systems can be attributed to customs, car testing, etc.

The internal radio communication system utilizing the waveguide in question may be constructed depending on the need or desires which exist with regard to control, monitoring, service, etc. of the parts involved. In the figure, the vehicle's engine is indicated by 48. Various functions in the engine can be monitored and controlled in a manner known per se. An example of this is a radio equipment part 49 for a first fixed or movable part in the motor. Said first part can establish a radio connection 50 with the radio equipment part 14 which is connected to the waveguide system. Second and third fixed or moving parts in the motor are correspondingly provided with radio equipment parts 51 and 52 which are connected to the radio equipment parts 13 and 15, respectively, via radio connections 53, 54. The instrument part, which in Figure 1 is symbolized by 55, can also have moving parts which via radio equipment parts 56, 57 are connected to the system via first connections 20, 21. The vehicle doors 1a, 1b, 1c and 1d may be provided with radio equipment parts 58, 59, 60, 61 which are connected via radio connections to the system's outlets or inlets 16, 17, 18 and 19 respectively. The radio connections in this case are symbolized by 62, 63, 64, 65. Fixed or moving parts in chairs or seats 66, 67, 68 and 69 are also connected to the waveguide system. In this case, the seats have radio equipment parts 70, 71, 72 and 73 which in a corresponding manner are connected to outlets and / or inlets 8, 9, 10, 11 in the waveguide system. The radio connections have in this case been indicated by 74, 75, 76 and 77. Figure 1 also shows the directions of the radio signals or microwaves which can be transmitted in both directions, i.e. in directions 78 and 79.

The air transport can take place from a media source in the directions of the arrows 80, 81 and 82. 10 15 20 25 30 01 ha N) so 01 0 ": 00 In accordance with Figure 2, the outlets or inlets 24, 26 may also consist of branches. In Figure 2, such a branch is indicated by 83. This branch, possibly together with other branches, may extend in the vertical direction of the vehicle up to the level of the position of the head of a user (driver or passenger) 84. The driver or passenger may use a headset 85 which is connectable to a radio equipment part 86. This radio equipment part may be in connection to a radio equipment part 87 via the radio connection 88. In the present case it has been stated that the waveguide part 83 should transport only microwaves in both directions 89, 90, but of course even if desired media can be transported in this waveguide part. of the waveguide system, microwaves or radio waves are transmitted in both directions 92, 93. Also in this case there is air transport in the directions of the arrows 94, 95, 96 and 97. Air or vice versa. can thus be evenly distributed in the vehicle's compartment in question. In fi clock 2, a windscreen is symbolized by 98. An outlet for air 99 can be guided towards the inside of the window. The engine's air pressure source is symbolized by 100. Microwave outlets and inlets can be made from the instrument part which is symbolized by 101 and various parts of the engine which are symbolized by 102.

Radio equipment parts are in this case symbolized by 103 and 104. The radio equipment part 104 stands for Lex. in connection with a mobile unit 105 via a radio connection 106.

Figure 3 shows in principle a waveguide 107 with double function as above. First connections are symbolized by 108 and 109 and second connections by 110, 111 and 112. Figure 3 also shows a pressure source arrangement 113 for the media in question, i.e. air, gas and / or liquid such as water, oil, etc. Said pressure source may include a pump, electric motor, etc. as indicated by 114.

In Figures 4 and 5, a waveguide with integrated functions in the form of radio signals / microwaves and media transport is shown in connection with a building 114. A waveguide 115 years is arranged in the roof 116 of the building. The waveguide is also in this case made with first and second connections for radio equipment or radio equipment parts or media initiating parts, e.g. an air pressure source 117. The waveguide may be arranged Lex. in the ceiling of the room or room 118. In accordance with Figure 5, the waveguide 119, 120 may include e.g. horizontal and vertical waveguide parts. In Figure 5, a pressure source such as 10 15 20 25 30 UI k) h.) I) (II (f connections 123, 124. The air directions are indicated by 125, 126. A first connection for a radio equipment part 127 is shown by 128. The radio equipment part is connected to a mobile or fixed part 129 via a radio connection 130.

Figures 6, 7 and 8 show different cross-sections for differently constructed waveguides. In Fig. 6, the waveguide 131 is made with a rectangular cross-section with a width a and a height b.

These dimensions of the waveguide depend on the bandwidth to be present on the radio signals or microwaves. The electrical constant of the material in the space 132 varies depending on the media to be transported. The present values for the dimensions of the waveguide depending on the bandwidths to be applied to the radio waves are as follows: Frequency Dimensions a / nln (fig.6) Dimensions bi relation (K) to a (fig.6) 2.4-2.54 GHz 92 b = a ggr K 5 8 ,, 39 1 <= o, 4 till 0,8 13,53-13,57 ”16,6 26,957-27,283” 3, 3 61-61.5 ”3,67 122-123” 1 Established waveguide technology and calculation methods can be applied to the present system in terms of distribution, direction, dimensioning, etc. Figure 7 shows a circular cross section of the waveguide 133, while Figure 8 shows an irregular cross section of the waveguide 134. In the housing material 135 , 136 and 137, respectively, electrical conductors 138, 139 for e.g. power supply is applied in or on the housing, e.g. on the outside or inside.

Figure 9 is intended to illustrate that the waveguide 140 need not have a prominent surface on or at its inner surface 142, which facilitates handling, installation, etc. Figure 15 shows an enlarged example of how an outlet or inlet for a first connection 143 can be performed. At the connection, a wall or disc 144 is provided in plastic or equivalent material which is resistant to the media 145 to be transported inside the waveguide 146. The disc 144 or the like shall have the electrical property that it allows the passage of radio waves 147 in one or both directions . For transmitting radio waves 148, a means in the form of a horn 149 is used in this case.

The clock 11 shows a grid 150 arranged in a waveguide 151. The grid has the property that it acts as a reflecting wall against radio waves or microwaves 152, while at the same time allowing the passage of a media 153 which is transported in the waveguide.

Figure 12 shows a reactor arrangement 153 which reflects the radio waves or microwaves 154 at a corner or knee 155 of a waveguide 156.

Figure 13 is intended to show that the waveguides or waveguide parts can be arranged with smaller bends or oscillations along their longitudinal direction. The waveguide 157 in this case has a smaller bend 158, which causes a certain internal reaction for the radio waves or microwaves 159. However, the system as a whole can accept such minor disturbances because the waveguide function needs to operate with a relatively small accuracy. This in turn means that the installation does not become critical in the vehicle in question. Material selection, towing technology, etc. can be kept at an economically reasonable level in the vehicle. The housing (cf. 135, 136, 137) can be given a strength that resists mechanical influences that normally occur during installation, vibration, etc. in the vehicle.

The waveguide 160 in question forms a very good enclosure for the radio waves or microwaves 161. The waveguide 160 therefore emits only a very small amount of electromagnetic radiation which in the fi clock 14 is symbolized by 162. Very low values, e.g. -0.05 dB can be expected to radiate to the environment 163.

In Figure 15, a waveguide is indicated by 164 and a radio equipment part, a pressure source, electric motor, etc. is symbolized by 165. The unit 165 is to be powered in the vehicle 10 '20 '52 955 11 and this can be done in accordance with the above with a conductor or cable arranged in or on the waveguide 164. The connection part 167 on the cable 166 can be fastened in the connection part 168 of the unit 165.

The guide or waveguides may wholly or partly comprise applied or unapplied air / gas or liquid (water, oil, etc.) which in the applied or not applied case gives a first characteristic of the electrical guide (s) of the guide, the guides and the waveguide part (s). properties and in the non-applied and applied case gives a second characteristic of said electrical properties. In the event of a certain change in the first or second characteristic, or in the event of a transition from the first to the second characteristic or vice versa, an indication equipment detects the change.

An exemplary embodiment of a cheap waveguide is a body of foam plastic covered with a metal foil, e.g. of aluminum. The thickness of the conductive material should be more than the skin thickness, e.g. 10 times or more. The leather thickness for aluminum and 2.45 GHz is about 1.71 micrometers. Suitable aluminum foil thickness is thus a few hundredths of a mm.

The aluminum foil itself can be single- or double-sided laminated with plastic. Filling materials other than foam plastic can be used with regard to different requirements such as desired cross-sectional area, stiffness, production method, price, etc.

The invention is not limited to the embodiment shown above as an example, but may be subjected to modifications within the scope of the appended claims and the idea of invention.

Claims (14)

10 15 20 25 30 522 955 11 P.ans. 0004380-2 PATENT REQUIREMENTS i Device comprising one or more radio equipment and one or two connections arranged therein, in or over which information signals are transmitted, characterized in that at least one of said connections comprises or consists of a waveguide for microwaves, by means of which a or fl one of said information signals is transferable and transferable, respectively, that each waveguide is arranged with a connection arrangement having connections to signal handling part or parts of the radio equipment or radio equipment, that the radio equipment or radio equipment and the waveguide or waveguides are included in a CAN system, which via the connection and the connections respectively controls and / or monitors the function-controlling and functional unit or units, and / or in a vehicle, e.g. passenger car, truck, bus, truck, aircraft, boat, ship, forestry machine, etc., and that the waveguides are arranged to work with additional functional tasks in the vehicle, e.g. conducting air and / or liquid, and therefore first connections assigned to the signal handling parts of the radio equipment and other connections have assigned equipment or equipment separate and separate from the respective information signal handling part and involved in said additional task. Device according to claim 1, characterized in that said further functional equipment (s) work with liquid and use one or more waveguides of said waveguide for internal transport of the liquid (oil, water, etc.). Device according to claim 1 or 2, characterized in that said further functional equipment (s) operate with electrical power transmission and use one or more waveguides of said waveguide as internal and / or external carrier of power transmission conductor, t. ex. to the said information signal handling part of the equipment. 10 15 20 25 30 O! 'r' n W (I: 0 ": Device according to one of Claims 1, 2 or 3, characterized in that the waveguide and the waveguides respectively provide a flow-through function for the air / gas and / or the liquid which is selected in relation to the frequency with which the radio equipment or equipment operates at approximate information signal transmission, ie. depending on the bandwidths, the microwaves travel in the respective waveguides. Device according to one of Claims 1 to 4, characterized in that electrical conductors or electrical conductors are applied in the housing of the respective waveguide, respectively, in connection with the outside or inside of the housing. Device according to one of Claims 1 to 5, characterized in that the waveguide or waveguides are provided with first connections, Lex. sockets, in connection with moving parts, such as door (s), chair (s), instrument part (s), motor part (s), etc., at or in which moving parts of the radio equipment include transmitting and / or receiving units are provided. Device according to claim 6, characterized in that the respective second first connection is arranged in substantial proximity to users of the respective third transmitter and / or receiver unit, e.g. in connection with the head height of the respective user. Device according to any one of claims 1-7, characterized in that in the case of vehicles, preferably in the form of a car or bus, the waveguide and the waveguides respectively form or are included in the vehicle's air conditioning system. Device according to any one of claims 1-8, characterized in that the waveguides comprise one or första your first parts which extend in a bottom structure of the vehicle and have one or fl your parts which extend at least substantially in the height of the vehicle. 10 15 20 25 30: S22 955 non o n n. N n n a a n c on nn n nn nn nn nn o un øn nn o n o n o o c nu: e o n .. nn n nn n nn n n n n; n n n r n n n n n a n: n 0 n o n n n n n n n n n n n n n n n n n n n Device according to one of the preceding claims, characterized in that the waveguide and the waveguides respectively comprise in whole or in part applied or not applied air / gas and liquid (water, oil, etc.) which in the applied or not applied case gives a first characteristic of the electrical properties of the waveguide, waveguides and waveguide part (s) and in the case not applied or applied gives a second characteristic of said electrical properties, and that in the event of a certain change in the first or second characteristic, or in the transition from the first to the second characteristic or vice versa, an indication equipment detects the change. 11. Device according to claim 10, characterized in that in the event of a detected change, an activation or deactivation takes place, e.g. in the form of switching on or off the indicator light, activation measure against the change, etc. Device according to one of the preceding claims, characterized in that the power outlet at the respective outlet (slot) in the waveguide or the waveguides is between 5-10% of the total transmission power. Device according to one of Claims 7 to 12, characterized in that the third transmission and / or reception units are included as mobile units in the CAN system. Device according to any one of claims 1-13, characterized in that said radio equipment or radio equipment parts are cooperable with a general or general telecommunication and / or computer system with a first bit and transmission speed capacity and that the radio equipment or radio equipment parts works via the waveguide and the waveguides in an internal CAN or communication system with a bit and transmission speed that differs from, e.g. is less than or exceeds the initial bit and transmission capacity.