WO2006070844A1 - Communication system - Google Patents

Abstract

[PROBLEMS] To provide a communication system that, in communication within a moving unit, such as a train, ship, vehicle, airplane or the like, uses very weak radio waves, while achieving a reduction of communication equipments and preventing the radio waves from leaking out of the radio communication space. [MEANS FOR SOLVING PROBLEMS] There is provided a communication system that comprises a mobile unit; a first transmitting/receiving apparatus; a first exciting apparatus that is connected to the first transmitting/receiving apparatus, excites, based on a first signal received from the first transmitting/receiving apparatus, a conductor in the mobile unit, and transmits a second signal received from the conductor in the mobile unit to the first transmitting/receiving apparatus; a second transmitting/receiving apparatus disposed in the mobile unit; and a second exciting apparatus that is connected to the second transmitting/receiving apparatus, excites, based on the second signal received from the second transmitting/receiving apparatus, the conductor in the mobile unit, and transmits the first signal received from the conductor in the mobile unit to the second transmitting/receiving apparatus.

Description

 Communications system

 Technical field

 [0001] The present invention relates to a communication system using weak radio waves. In particular, the present invention relates to a communication system in a mobile body such as a train, a ship, and an airplane, a communication system between mobile bodies, and a communication system between the mobile body and a fixed station.

 Background art

 [0002] In a modern society where an information network is highly constructed, information communication technology is indispensable. In particular, with the recent development of wireless communication technology, the range in which wireless communication can be used has been expanded. Wireless communications include relatively low-power communications such as mobile phone communications, transceiver communications, and wireless LAN communications, as well as high-power communications such as aviation radio, ship radio, and amateur radio communications.

 [0003] Among low-power communications, wireless communication devices that use weak radio waves (maximum electric field strength of 500 μV / m at a point 3 m from the transmitter when the transmission output frequency is 322 MHz or less) are prone to emit radio waves. Because it is weak, (1) anyone, anytime, anywhere can use it freely. (2) The person who uses the wireless communication equipment needs to take a test and obtain a license qualification (wireless worker license). (3) Unlike specific low-power radio equipment and land mobile stations, the frequency can be freely selected and a frequency without interference can be selected and used. (4) The antenna is also disconnected from the radio equipment. Various types of wireless communication devices such as home cordless telephones and transceivers have been put to practical use because of the merit that they can be installed.

 [0004] However, in conventional wireless communication devices, the radio wave used is extremely weak, so the approximate communication / communication distance is about 30m in line of sight, and the reach is not sufficient and interference is also disturbed. There were drawbacks such as easy.

[0005] In addition, in conventional wireless communication devices, radio waves used are extremely weak. However, radio waves (electromagnetic signals) in a wireless communication space leak to the outside, and other wireless communication devices The range of communication is extremely limited, and its use is very limited, and it is not possible to make full use of the advantages described above. [0006] In general, compared to conventional wired communication, a wireless communication space can be easily created at a low cost, but it is interrupted by a person or an obstacle during communication, and the communication speed is low. Which problem is there. In addition, radio waves generated by wireless communication have the property of going straight, and there is a drawback that communication is interrupted if people or objects block between the transmitter and receiver during communication. In addition, the attenuation of wireless radio waves is inversely proportional to the square of the distance, so the range in which wireless communication can be performed is limited.

 [0007] Under such circumstances, the applicant of the present application can prevent the leakage of radio waves from the inside of a structure such as a building to the outside, or can secure an adequate communication / call reach distance. Continued research on V, so-called evanescent communication technology, which performs communication using a point wave! (See Patent Documents 1 to 3).

 Patent Document 1: WO03103195A1

 Patent Document 2: WO03009501A1

 Patent Document 3: WO03009500A1

 Disclosure of the invention

 Problems to be solved by the invention

[0008] On the other hand, wired communication technology is often used for communication in a moving body such as a train, a ship, a car, and an airplane as usual. Due to its nature, moving bodies such as trains are required to be lightweight except for useless parts as much as possible. However, as long as conventional wired communication technology is used, the weight of parts such as wiring and terminals is required. This is a burden and obstructs light weight.

 [0009] In addition, because communication in a mobile body such as a train moves in the communication space, radio waves (electromagnetic signals) in the wireless communication space leak to the outside, and other wireless communication devices It can be a jamming signal.

[0010] Therefore, the present invention has been made in view of the above-described problems, and in communication within a moving body such as a train, a ship, a car, and an aircraft, wireless communication is achieved while realizing reduction in weight of communication equipment. It is an object of the present invention to provide a communication system using weak radio waves that prevents leakage of radio waves outside the space. Means for solving the problem

 [0011] A wireless communication system of the present invention includes an excitation device (exciter) that excites a conductor inside a moving body and transmits a signal by an output signal of a signal generation device built in a transceiver. Yes. With the excitation device, weak radio waves are transmitted through the conductor, and the weak radio waves are transmitted throughout the moving body.

 [0012] Conductors existing in the moving body include electric wires, steel frames, metal walls, lead pipes, or combinations thereof, and the excitation device has a function of exciting (exciting) the conductors! /, The

 [0013] According to the present invention, the moving body, the first transceiver, and the first body are connected to the first transceiver and the first body is transmitted based on the first signal transmitted from the first transceiver. A first exciter that excites the conductor and receives a second signal transmitted from the conductor in the moving body and transmits the second signal to the first transceiver, and is installed in the moving body. A second transmitter / receiver, and the second transmitter / receiver connected to the second transmitter / receiver to excite the conductor in the mobile body based on the second signal transmitted from the second transmitter / receiver; and There is provided a communication system having a second excitation device that receives the first signal transmitted from the conductor in the moving body and transmits the first signal to the second transceiver.

 [0014] Further, according to the present invention, the mobile unit, the first transceiver, and the first transceiver are connected to the first transceiver, and the mobile device is transmitted based on the first signal transmitted by the first transceiver. Exciting a conductor in the body, generating a wireless communication space by a quasi-static non-propagating electromagnetic field in the moving body, and receiving a second signal transmitted from the conductor in the moving body; A first exciter for transmission to the first transceiver, a second transmitter / receiver installed in the mobile body, and the second transceiver for transmission from the wireless communication space. An antenna that receives the first signal, transmits the second signal to the second transceiver, and transmits the second signal transmitted from the second transceiver to the wireless communication space. A communication system is provided.

According to the present invention, the first moving body, the second moving body electrically connected to the first moving body, and the first moving body installed in the first moving body The transmitter is connected to the first transmitter / receiver, and the first conductor in the first moving body is excited based on the first signal transmitted from the first transmitter / receiver. A second lead in the second moving body A first exciter for exciting an electric body and receiving a second signal transmitted from the first conductor in the first moving body and transmitting the second signal to the first transceiver; and the second A second transmitter / receiver installed inside the body and the second transmitter / receiver connected to the second transmitter / receiver and based on the second signal transmitted from the second transmitter / receiver Exciting the first conductor in the first moving body by exciting the second conductor, and transmitting from the second conductor in the second moving body There is provided a communication system having a second excitation device that receives a first signal and transmits the first signal to the second transceiver.

 [0016] Further, according to the present invention, the first moving body, the second moving body electrically connected to the first moving body, and the first moving body installed inside the first moving body. A first transmitter / receiver and a first conductor connected to the first transmitter / receiver, and exciting a first conductor in the first moving body based on a first signal transmitted from the first transmitter / receiver. To excite the second conductor in the second moving body, to generate a wireless communication space by a quasi-static non-propagating electromagnetic field in the second moving body, and in the first moving body A first excitation device that receives a second signal transmitted from the first conductor and transmits the second signal to the first transceiver, and a second transceiver installed in the second mobile body Connected to the second transceiver, receives the first signal transmitted from the wireless communication space, and transmits it to the second transceiver. And, and a communication system having an antenna for transmitting the second signal to the wireless communication space transmitted from said second transceiver is provided.

[0017] The mobile body may be an automobile, a ship, a submarine, or an aircraft.

[0018] Further, according to the present invention, a train having a conductor installed on a rail and electrically connected to the rail, a first transceiver, and the first transceiver are connected, First transceiver force Exciting the conductor in the train by exciting the rail based on the transmitted first signal, and receiving the second signal transmitted from the rail, A first exciter that transmits to the first transceiver, a second transceiver installed in the train, and a second transceiver that is connected to the second transceiver and transmits from the second transceiver The rail is excited by exciting the conductor in the train based on the second signal, and the first signal transmitted from the conductor in the train is transmitted. There is provided a communication system including a second excitation device that receives a signal and transmits the signal to the second transceiver.

 [0019] Further, according to the present invention, a train having a conductor installed on a rail and electrically connected to the rail, a first transceiver, and the first transceiver are connected to the train. A second signal transmitted from the rail is generated by exciting a rail and exciting the conductor in the train to generate a wireless communication space by a quasi-static non-propagating electromagnetic field in the train. The first exciter for transmitting to the first transmitter / receiver, the second transmitter / receiver installed inside the train, and the second transmitter / receiver, and connected to the radio communication space. An antenna that receives the transmitted first signal, transmits the second signal to the second transceiver, and transmits the second signal transmitted from the second transceiver to the wireless communication space; A communication system is provided.

 [0020] In addition, according to the present invention, a first train having a first conductor installed on a rail and electrically connected to the rail, and the first train installed on the rail. A second train having a second conductor electrically connected to the first train, a first transmitter / receiver installed in the first train, the first transmitter / receiver connected to the first train, The first conductor in the first train is excited based on the first signal transmitted from the first transceiver, and the second conductor in the second train is excited by exciting the rail. A first exciter for exciting a conductor and receiving a second signal transmitted from the first conductor in the first train and transmitting the second signal to the first transceiver; and A second transmitter / receiver installed inside the train of 2 and the second transmitter / receiver connected to the second transmitter / receiver. The second conductor in the second train is excited based on the second signal transmitted, and the first conductor in the first train is excited by exciting the rail. A second excitation device that excites and receives the first signal transmitted from the second conductor in the second movable body and transmits the first signal to the second transceiver. A system is provided.

[0021] According to the present invention, the first train having a first conductor installed on a rail and electrically connected to the rail, and the first train installed on the rail. And a second train having a second conductor electrically connected to the first moving body. A first transmitter / receiver installed in the first train based on a first signal transmitted to the first transmitter / receiver and connected to the first transmitter / receiver. And the second electric conductor in the second train is excited by exciting the rail, and a wireless communication space using a quasi-static non-propagating electromagnetic field in the second moving body. A first exciter that receives the second signal transmitted from the first conductor in the first moving body and transmits the second signal to the first transceiver, and the second train. A second transmitter / receiver installed inside and a second transmitter / receiver connected to the second transmitter / receiver for receiving the first signal transmitted from the wireless communication space and transmitting to the second transmitter / receiver And an antenna for transmitting the second signal to be transmitted to the wireless communication space. Communication system having is provided.

[0022] The excitation device may include a capacitor and a resistance force connected in series.

 The invention's effect

 [0023] The communication system of the present invention

 Even if the output of information signals such as voice 'image' data is kept within the weak power range, the conductor excited by the excitation device (exciter) is transmitted and propagated through the conductor to the immediate vicinity of the receiver. Despite the use of weak radio waves, stable communication can be realized. In addition, it is possible to reduce many of the parts such as wiring and terminals that are necessary in the conventional wired communication technology, and to realize weight reduction.

 [0024] In addition, since the radio wave used for communication in the moving body in the present invention is a radio wave using a pseudo electrostatic magnetic field, it is possible to suppress the emission of the weak radio wave due to the information signal such as sound image, data, etc. Leaks out of the wireless communication space! /, And has an excellent effect.

 Brief Description of Drawings

FIG. 1 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.

 FIG. 2 is a schematic configuration diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 3 is a conceptual diagram of an embodiment of a communication system of the present invention.

FIG. 4 is a configuration diagram of a frequency conversion device and an excitation device in an embodiment of a communication system of the present invention. FIG. 5 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.

 FIG. 6 is a schematic configuration diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 7 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.

 FIG. 8 is a schematic configuration diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 9 is a conceptual diagram of an embodiment of a communication system according to the present invention.

 FIG. 10 is a schematic configuration diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 11 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.

 FIG. 12 is a diagram showing an example of an excitation device used in the communication system of the present invention.

 FIG. 13 is a diagram showing an example of an excitation device used in the communication system of the present invention.

 FIG. 14 is a schematic block diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 15 is a conceptual diagram of an embodiment of a communication system according to the present invention.

 FIG. 16 is a schematic configuration diagram of an embodiment of a communication system according to the present invention.

 FIG. 17 is a conceptual diagram of an embodiment of a communication system according to the present invention.

 FIG. 18 is a schematic configuration diagram of an embodiment of a communication system according to the present invention as viewed from the side.

 FIG. 19 is a graph showing the measurement results of the SZN ratio in one example of the communication system of the present invention.

 Explanation of symbols

 [0026] 100, 101, 102 Train 100a, 100b Wheel 101a, 101b Wheel 102a, 102b Wheel 1 03, 104 Rail 106 Transceiver 107 Exciter 108, 108a, 108b Signal line 109a, 109b Connection

 BEST MODE FOR CARRYING OUT THE INVENTION

In this embodiment, an example in which the communication system of the present invention is applied to a train will be described.

[0028] Reference is made to FIG. FIG. 1 shows a schematic configuration diagram of a communication system of the present invention according to this embodiment. 100, 101 and 102 are trains. Trains 100, 101 and 102 have wheels 100a, 100b, 100c and 100d (100c and lOOd not shown), 101a, 101b, 101c and 101d (101c and 101d not shown) made of metal or conductive material, respectively. ), 102a, 102b, 102c and 102d (102c and 102d are not shown). Trains 100, 101, and 102 are provided on rails 103 and 104 made of metal or conductive material through these wheels, respectively, and travel on rails 103 and 104, respectively. Reference numeral 106 denotes a transceiver that supplies a video signal, an audio signal, and various information signals to the excitation device 107. The excitation device 107 excites the rail 104 (and Z or 103) via the signal lines 108, 108a and 108b based on these information signals. Further, the transceiver 106 receives signals such as video signals transmitted through the rail 103 (and Z or 103) via the signal lines 108, 108a and 108b and the excitation device 107. Reference numerals 109 a and 109 b denote connecting portions that connect the train 100, the train 101, and the train 102. In this embodiment, the signal line 108 may be drawn directly from the force excitation device 107 force signal lines 108a and 108b which are branched into 108a and 108b.

 In the present embodiment, the skeleton of the trains 100, 101 and 102, the wheels 100a, 100b, 100c and 100d, the wheels 101a, 101b, 101c and 101d, the wheels 102a, 102b, 102c and 102d, and the rail 103 And 104 is a force made of iron, but it is not limited to this, and it may be made of other metals or conductive materials!

 [0030] Reference is now made to FIG. FIG. 2 is a side view of the communication system of the present invention shown in FIG. In FIG. 2, the trains 100, 101, and 102 are illustrated for the sake of convenience.

 [0031] The trains 100, 101, and 102 include transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively. The transceivers 100e and 100h installed in the train 100 supply video signals, audio signals, and various information signals to the excitation devices 100f and 100i, respectively. Exciters 100f and 100i are connected to the metal part of the floor of train 100 (the part electrically connected to wheels 100a to 100d) via signal lines 100g and 100j, respectively.

In addition, the trains 101 and 102 have the same configuration as the train 100. The transceivers 101e and 101h installed inside the train 101 supply video signals, audio signals, and various information signals to the excitation devices 101f and 101i, respectively. Exciters 101f and 101i are connected to the metal part of the floor of train 101 (the part electrically connected to wheels 101a to 101d) via signal lines 101g and 101j, respectively. Also installed inside train 102 The received transceivers 102e and 102h supply video signals, audio signals, and various information signals to the excitation devices 102f and 102i, respectively. Exciters 102f and 102i are connected to the metal part of the floor of train 102 (the part electrically connected to wheels 102a to 102d) via signal lines 102g and 102j, respectively.

 [0033] In the communication system of the present invention according to this embodiment, three trains 100, 101 and 102 are used, and each train is provided with two transceivers. The number and the number of transceivers are not limited to this.

 In the communication system of the present invention according to the present embodiment, the excitation device 107 is configured to be electrically connected to the rail 104 via the signal lines 108, 108a, and 108b. It can also be electrically connected to rail 103 via signal lines 108, 108a and 108b or via another signal line!

 [0035] Here, bidirectional communication between the transceiver 106 and the transceiver lOOe of the train 100 will be described. The transceiver 106 supplies a signal such as a video signal to the excitation device 107. The excitation device 107 excites the rail 104 through the signal lines 108, 108a and 108b based on these information signals. Signals such as video signals transmitted from the exciter 107 via the signal lines 108, 108a and 108b to the rail 104 propagate through the rail 104 and through the wheels 100a, 100b, 100c and 100d, the metal part of the train 100. Propagate to. Then, the signal is transmitted to the excitation devices 100f and 100i connected via the signal lines 100g and 100j connected to the metal part of the train. The transceivers 100e and 100h receive the signals via the excitation devices 100f and 100i. The rail 104 is excited at least between the point where the rail 104 and the signal line 108a are connected and the point where the rail 104 and the signal line 108b are connected. Note that the force that the rail 104 can be excited in other ranges also depends on the signal output from the transceiver 106. Note that the rail 104 may be connected to one of the signal lines 108a and 109a.

[0036] The transceivers 100e and 100h supply signals such as video signals to the excitation devices 100f and 100i, respectively. The excitation devices 100f and 100i excite the metal part of the floor of the train 100 via the signal lines 100g and 100j based on these information signals, respectively. The information is then stored in the wheels 100a, 100b, The information is transmitted to the rails 103 and 104 through 100c and lOOd, and the information propagates through the rails 103 and 104 and is received by the transmitter / receiver 106 through the signal lines 108, 108a and 108b and the excitation device 107. In this way, bidirectional communication of signals such as video signals is performed between the transceiver 106 and the transceivers 100e and 100h.

 [0037] Regarding transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 101e and 101h, and transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 102e and 102h. The same is done.

 [0038] In the communication system of the present invention according to the present embodiment, signals such as video signals can be transmitted / received between the transceivers using the train skeleton, wheels, and rails as media.

 [0039] Reference is now made to FIG. FIG. 3 shows a conceptual diagram of the communication system of the present invention according to this embodiment. In FIG. 3, for the sake of convenience of explanation, bidirectional communication between the transceiver 106 and the transceiver 100e is described as an example. As shown in FIG. 3, in the communication system of the present invention according to the present embodiment, two-way communication of signals such as video signals between the transceiver 106 and the transceiver 100e is performed by conducting electricity such as train skeletons, wheels, and rails. It is realized by using a sexual substance as a medium. In the present embodiment, the transceiver 106 includes a computer (PC) 106a, a modem 106b, and a frequency converter 106c. If the transceiver 106 has a function of transmitting and receiving information such as a video signal, the design can be changed in a timely manner.

 Further, the transceivers 100e, 100f, 101e, 101e, 102e, and 102f have the same configuration as the transceiver 106. FIG. 3 illustrates the configuration of the transceiver 100e as an example. In the present embodiment, the transceiver 100e includes a computer (PC) 100e-1, a modem 100e-2, and a frequency converter 100e-3. The transmitter / receiver 100e can be changed in design as long as it has a function to transmit and receive information such as video signals.

 [0041] The computer lOOe-l in the transceiver 100e centrally manages sensor information from train brakes, wind pressure motors, air conditioners, wheel temperature sensors, etc. in real time and is similar to signals such as video signals. In addition, these sensor information may be transmitted and received.

[0042] Reference is now made to FIG. Fig. 4 (A) shows the frequency converter 106c used in this embodiment. It is shown. In the present embodiment, the frequency converter 106 c converts the 2484 MHz (2.484 GHz) radio wave transmitted from the modem 106 b into a 20 MHz, 25 MHz, 30 MHz, or 40 MHz radio wave and supplies it to the excitation device 107. Further, the frequency converter 106c converts the 20 MHz, 25 MHz, 30 MHz, or 40 MHz radio waves transmitted from the excitation device 107 into 2484 MHz radio waves and supplies them to the modem 106b. As described above, the communication system of the present invention is characterized by the use of radio waves having a frequency that is relatively lower than that of the prior art. Note that the frequency bands used by the frequency converter 106c are not limited to these frequency bands, and can be changed in design in a timely manner. Note that the frequency converters of the transceivers 100e, 100h, 101e, 101h, 102e, and 102h have the same configuration as the frequency converter 106c.

FIG. 4B shows the configuration of the excitation device 107 of this embodiment. Real

 In the embodiment, the excitation device 107 has a configuration in which a capacitor C and a resistor R are connected in series. In this embodiment, a capacitor C having a resistance of 0.01 / zf and a resistance R of 50Ω is used.

 [0044] The 2484MHz (2.484GHz) radio wave transmitted from the modem 106b is converted into a 30MHz radio wave by the frequency converter 106c, supplied to the exciter 107, and injected into the rail 104 through the signal lines 108a and 108b. FIG. 18 is a graph showing the measurement result of the S ZN ratio of the signal received by the transceiver 102e in the train 102. The radio wave intensity was 5W. In FIG. 18, the data force displayed as “This station” is the data for the transceiver 102e in the train 102. According to the measurement result of the SZN ratio, it can be seen that the communication system of the present invention according to the present embodiment can realize communication with a good SZN ratio.

Note that the communication system of the present invention of the present embodiment includes a transceiver 106 connected to a rail, and transceivers 100e, 100h, 101e, 101h, 102e, and 102h in IJ cars 100, 101, and 102. The two-way communication between the transceivers 100e, 100h, 101e, 101h, 102e, and 102h can be performed through the rail.

[0046] The communication system according to the present embodiment of the present invention includes a rail, a wheel, an electromagnetic signal excited by an excitation device, even if the output of an information signal such as audio 'image' data is kept within a weak power range. Propagating through the electric conductor of the train, stable communication can be realized. In addition, many of the parts such as wiring and terminals conventionally used for wired communication in the train are no longer required, and the train can be made lighter.

 Example 1

 In this example, an example will be described in which the connection of the transceiver 106, the excitation device 107, and the signal line 108 is changed in the communication system described in the above embodiment (FIGS. 1 to 4). In the present embodiment, the same components as those described in the above-described embodiment (FIGS. 1 to 4) are denoted by the same reference numerals and will not be described again here.

[0048] Reference is made to FIG. FIG. 5 shows a schematic configuration diagram of the communication system of the present embodiment.

 As shown in FIG. 5, in this embodiment, the signal line 108 connected to the excitation device 107 is directly connected to the metal part of the train 102. The excitation device 107 excites the conductor in the train 102 via the signal line 108 based on the information signal supplied from the transceiver 106. Then, the information power wheels 100a, 100b, 100c and 100d and wheels 101a, 101b, 101c and lOld are connected via the wheels 102a, 102b, 102c and 102d electrically connected to the train 102 and the rails 103 and 104. Propagate to train 100 and train 101.

 [0049] Reference is now made to FIG. FIG. 6 is a side view of the communication system of the present invention shown in FIG. In FIG. 6, the trains 100, 101, and 102 are illustrated for the sake of convenience. As shown in FIG. 6, trains 100, 101, and 102 include transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively.

 [0050] The transceivers 100e and 100h installed in the train 100 supply video signals, audio signals, and various information signals to the excitation devices 100f and 100i, respectively. Exciters 100f and 100i are connected to the metal part of the floor of train 100 (the part electrically connected to wheels 100a to 100d) via signal lines 100g and 100j, respectively. Trains 101 and 102 have the same configuration!

[0051] Here, bidirectional communication between the transceiver 106 and the transceiver 100e of the train 100 will be described. The The transceiver 106 supplies a signal such as a video signal to the excitation device 107. The excitation device 107 excites the metal part (conductor) in the train 102 via the signal line 108 based on these information signals. A signal such as a video signal transmitted from the excitation device 107 via the signal line 108 propagates through the wheels 102a, 102b, 102c and 102d and the rail 104 of the train 102, and passes through the wheels 100a, 100b, 100c and 100d. Propagates to the metal part of train 100. Then, the signal is transmitted to the excitation devices 100f and 100i connected via the signal lines 100g and 100j connected to the metal part of the train 100. The transceivers 100e and 100h receive the signal via the excitation devices 10f and 100i.

[0052] Further, the transceivers 100e and 100h supply signals such as video signals to the excitation devices 100f and 100i, respectively. The excitation devices 100f and 100i excite the metal part of the floor of the train 100 via the signal lines 100g and 100j based on these information signals, respectively. The information is then transmitted to rails 103 and 104 via wheels 100a, 100b, 100c and 100d electrically connected to the metal part of the floor of train 100, and the information is transmitted to rails 103 and 104, wheels. 102a, 102b, 102c and 102d and the metal part of the train 102 are propagated and received by the transceiver 106 via the signal line 108 and the excitation device 107. In this way, bidirectional communication of signals such as video signals is performed between the transmitter / receiver 106 and the transmitters / receivers 100e and 100f.

 [0053] Regarding transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 101e and 101h, and transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 102e and 102h. The same is done.

[0054] In the communication system of the present invention according to the present embodiment, signals such as video signals can be transmitted and received between the transceivers by using the train frame, wheels, and rails as a medium. Example 2

[0055] In this example, an antenna is used in place of the exciter installed in train 100, train 101, and train 102 in the communication system described in the above embodiment (Figs. 1 to 4). Will be described. In the present embodiment, the same components as those described in the above embodiment (FIGS. 1 to 4) are denoted by the same reference numerals and will not be described again here. [0056] Reference is made to FIG. FIG. 7 is a side view of the communication system of the present invention in this embodiment. In FIG. 7, for convenience of explanation, trains 100, 101 and 102 are shown in their interiors.

 The trains 100, 101, and 102 include transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively. The transceivers 100e and 100h installed inside the train 100 are connected to the antennas 100k and 100i, respectively. Train 101 has the same configuration as train 100, and transceivers 101e and 101h are connected to antennas 101k and 101i, respectively. Further, the train 102 has the same configuration as the train 100, and the transceivers 102e and 102h are connected to the antennas 102k and 102i, respectively.

 [0058] In the communication system of the present invention according to the present embodiment, three trains 100, 101 and 102 are used, and each train is provided with two trains. However, the number of transmitters and receivers is not limited to this.

 In the communication system of the present invention according to the present embodiment, the excitation device 107 is connected to the signal line 108 from the force excitation device 107 that is electrically connected to the rail 104 via the signal line 108. It may be electrically connected to the rail 103 via 108a and 108b or via another signal line. The rail 104 may be connected to one of the signal lines 108a and 109a. Also, as explained in Example 1 above, the signal line may be connected to the train 102.

[0060] Here, bidirectional communication between the transceiver 106 and the transceiver 100e of the train 100 will be described. The transceiver 106 supplies a signal such as a video signal to the excitation device 107. The excitation device 107 excites the rail 104 through the signal lines 108, 108a and 108b based on these information signals. A signal such as a video signal transmitted from the excitation device 107 to the rail 104 via the signal line 108 propagates on the rail 104 and propagates to the metal part of the train 100 via the wheels 100a, 100b, 100c, and 100d. In this way, the signal propagated to the metal part of the train 100 is filled with an electromagnetic field called a “quasi-static field” or “evanescent space” of the entire train 100 force. This electromagnetic field is called a “quasi-static” field because it does not produce radio waves that reach distant receivers. [0061] This electromagnetic field, called "evanescent space", is used to connect many different wireless devices without wiring and, more importantly, can be used without interference with other existing wireless devices. One of the preferred embodiments of the present invention generates signals in the ultra high frequency (VHF) band, which is in the 3-40 MHz frequency range, and signals in the ultra-high frequency (UHF) lower band (up to at least 400 MHz). Can also be generated.

 [0062] The antennas 100k and 1001 installed in the evanescent space filled in the train 100 receive signals and transmit them to the transceivers 100e and 100h, respectively. Then, the transmitters / receivers 100e and 100h receive the signals.

 [0063] The transceivers 100e and 100h supply signals such as video signals to the antennas 100k and 1001, respectively. Antennas 100k and 1001 transmit weak radio waves (radio waves with a maximum transmission field strength of 500 VZm at a point 3 m away from the transmitter at a transmission frequency of 322 MHz or less) to the evanescent space. In this embodiment, rod antennas are used for the antennas 100k and 1001.

 [0064] The signal transmitted to the evanescent space propagates through the wheels 100a, 100b, 100c and 100d and the rails 103 and 104, and is received by the transceiver via the signal lines 108, 108a and 108b and the excitation device 107.

 In this way, bidirectional communication of signals such as video signals is performed between the transceiver 106 and the transceivers 100e and 100h.

 [0066] Regarding transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 101e and 101h, and transmission / reception of signals such as video signals between the transceiver 106 and the transceivers 102e and 102h. The same is done.

[0067] Reference is now made to FIG. FIG. 8 shows a conceptual diagram of the communication system of the present invention according to the present embodiment. In FIG. 3, for convenience of explanation, bidirectional communication between the transceiver 106 and the transceiver 100e is described as an example. As shown in FIG. 8, in the communication system of the present invention according to the present embodiment, bidirectional communication of signals such as video signals between the transceiver 106 and the transceiver 100e is performed. It is realized by propagating conductive materials such as rails as a medium to form an evanescent space in the train. In the present embodiment, the transceiver 106 is a computer (PC) 106a, a modem. 106b and a frequency converter 106c. If the transmitter / receiver 106 has a function of transmitting / receiving information such as video signals, the design can be changed in a timely manner. As the excitation device 107, the excitation device described with reference to FIGS. 12 and 19 described later can be used in addition to the one described with reference to FIG.

 [0068] Further, the transceivers 100e, 100f, 101e, 101e, 102e, and 102f have the same configuration as the transceiver 106. In Fig. 3, the configuration of the transceiver lOOe is shown as an example. In this embodiment, the transceiver lOOe has a computer (PC) lOOe-1, a modem lOOe-2, and a frequency converter lOOe-3. The transmitter / receiver lOOe can be redesigned in a timely manner as long as it has a function to transmit and receive information such as video signals.

 [0069] The computer lOOe-1 in the transceiver lOOe centrally manages sensor information from train brakes, wind pressure motors, air conditioners, wheel temperature sensors, etc. in real time and is similar to signals such as video signals. In addition, these sensor information may be transmitted and received.

[0070] In the communication system of the present invention in this embodiment, the radio wave used for communication in the train is a radio wave using an evanescent space. It is possible to suppress the weak radio waves from leaking out of the wireless communication space (train)! /, Which has an excellent effect.

 Example 3

 [0071] In this embodiment, a communication system between the train 100, the train 101, and the train 102 will be described. In the present embodiment, the same components as those described in the above embodiment (FIGS. 1 to 4) are denoted by the same reference numerals and will not be described again here.

 [0072] Reference is made to FIG. FIG. 9 shows a schematic configuration diagram of the communication system of the present embodiment.

 The communication system of the present embodiment performs communication between a transmitter / receiver located outside the train and a transmitter / receiver installed inside the train, like the communication system described in the above-described embodiment (FIGS. 1 to 4). It is intended to communicate between multiple transceivers installed inside trains.

[0073] As shown in FIG. 9, in the communication system of the present embodiment, an exciter is provided below the train 102. 102m is provided. The same components as those shown in FIG. 1 are given the same reference numerals and will not be described again here.

[0074] Reference is made to FIG. FIG. 10 is a side view of the communication system of the present invention shown in FIG. In FIG. 2, for the convenience of explanation, the trains 100, 101, and 102 are shown inside.

 [0075] Trains 100, 101, and 102 include transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively. The transceivers 100e and 100h installed in the train 100 supply video signals, audio signals, and various information signals to the excitation devices 100f and 100i, respectively. Exciters 100f and 100i are connected to the metal part of the floor of train 100 (the part electrically connected to wheels 100a to 100d) via signal lines 100g and 100j, respectively.

 In addition, the train 101 has the same configuration as the train 100. The transceivers 101e and 101h installed in the train 101 supply video signals, audio signals, and various information signals to the excitation devices 101f and 101i, respectively. Exciters 101f and 101i are connected to the metal part of the floor of train 101 (the part electrically connected to wheels 101a to 101d) via signal lines 101g and 101j, respectively.

 [0077] The transceiver 102h installed inside the train 102 sends video signals, audio signals, and various information signals to the lower metal part of the train 102 (the part electrically connected to the wheels 102a to 102d). Supply to the installed exciter 102m. A transceiver 102e installed inside the train 102 supplies video signals, audio signals, and various information signals to the excitation device 102f. Each of the excitation devices 102f is connected to a metal part (a portion electrically connected to the wheels 102a to 102d) of the floor of the train 102 via a signal line 102g.

 [0078] In the communication system of the present invention according to the present embodiment, three trains 100, 101, and 102 are used, and each train is a power train provided with two transceivers. However, the number of transmitters and receivers is not limited to this.

[0079] Here, bidirectional communication between the transceiver 102h of the train 102 and the transceiver 100e of the train 100 will be described. The transceiver 102h supplies a signal such as a video signal to the excitation device 102m. The excitation device 102m excites the conductor in the train 102 based on this information signal, Excitingly connected rails 103 and 104. Signals such as video signals transmitted from the exciter 102m via the conductors in the train 102 to the rails 103 and 104 propagate through the rails 103 and 104, and the train 100 via the wheels 100a, 100b, 100c and 100d. Propagates to the metal part. Then, the signal is transmitted to the excitation devices 100f and 100i connected via the signal lines 100g and 100j connected to the metal part of the train. The transceivers 100e and 100h receive the signals via the excitation devices 100f and 100i.

 Further, the transceivers 100e and 100h supply signals such as video signals to the excitation devices 100f and 100i, respectively. The excitation devices 100f and 100i excite the metal part of the floor of the train 100 via the signal lines 100g and 100j based on these information signals, respectively. The information is transmitted to rails 103 and 104 via wheels 100a, 100b, 100c and 100d electrically connected to the metal part of the floor of train 100, and the information propagates through rails 103 and 104. Then, the signal is received by the transceiver 102h via the wheels 102a, 102b, 102c and 102d of the train 102 and the excitation device 102m. In this way, bidirectional communication of signals such as video signals is performed between the transceiver 102h and the transceivers 100e and 100h.

 [0081] Note that transmission / reception of signals such as video signals between the transceiver 102h and the transceivers 101e and 101h, and transmission / reception of signals such as video signals between the transceiver 102h and the transceiver 102e, The same is done.

 [0082] In the communication system of the present invention according to the present embodiment, signals such as video signals can be transmitted and received between the transceivers by using the train skeleton, wheels, and rails as a medium.

[0083] Reference is now made to FIG. FIG. 11 shows a conceptual diagram of the communication system of the present invention according to the present embodiment. In FIG. 11, for the sake of convenience of explanation, bidirectional communication between the transceiver 102h and the transceiver 100e is described as an example. As shown in FIG. 11, in the communication system of the present invention according to the present embodiment, bidirectional communication of signals such as video signals between the transceiver 102h and the transceiver 100e is performed using a train skeleton, wheels, rails, etc. It is realized using a conductive substance as a medium. In the present embodiment, the transceiver 102h includes a computer (PC) 106a, a modem 106b, and a frequency converter 106c. If the transmitter / receiver 102h has a function of transmitting and receiving information such as a video signal, the design can be changed in a timely manner. Further, the transceivers 100e, 100f, 101e, lOle and 102e have the same configuration as the transceiver 106. FIG. 10 illustrates the configuration of the transceiver 100e as an example. In this embodiment, the transceiver 100e includes a computer (PC) 100e-1, a modem 100e-2, and a frequency converter 100e-3. Even if the transceiver 100e has a function for transmitting and receiving information such as video signals, the design can be changed in a timely manner.

 [0085] The computer 100e-1 in the transceiver 100e centrally manages sensor information from train brakes, wind pressure motors, air conditioners, wheel temperature sensors, etc. in real time and is similar to signals such as video signals. In addition, these sensor information may be transmitted and received.

 [0086] Excitation devices 100f, 100i, 101f, 101h, and lOle installed in the train in this example were the same as those shown in Fig. 4B. On the other hand, as the exciter 102m installed at the lower part of the train, the one shown in Fig. 12 or 13 was used.

 FIG. 12 shows an excitation device 102m used in the communication system of the present invention. 12A shows a side view of the excitation device 102m, FIG. 12B shows an enlarged side view of the excitation device 102m, and FIG. 12C shows a perspective view of the excitation device 102m.

 In FIG. 12, reference numeral 16100 denotes a main body of the excitation device 102m. An excitation device body 16100 shown in FIG. 12 is a hemispherical excitation device (hereinafter referred to as “three-dimensional excitation device”). The hemispherical excitation device 16100 has a complicated structure, but has high communication stability.

 [0089] The output required for communication is related to the required signal quality and is proportional to the total volume of the structure or premises forming the wireless communication space. On the other hand, the most important dimension for the generation of weak radio waves is the minimum distance between opposing conductors in each room of the structure. This minimum distance defines the cut-off frequency for the structure and determines whether weak radio waves are generated in the room when the function of the exciter is performed.

The hemispherical excitation device 16100 is held in a posture by a physical support 16101. In order to obtain the optimum effect, the hemispherical excitation device 16100 is preferably installed inside the enclosed space and juxtaposed with the lower portion 16200 of the train as shown in FIG. 12 (A). When the exciter 16100 is installed in the train, the train wall is indicated by reference numeral 16200. In addition, the hemispherical excitation device 16100 has an installation lower part 16201 and an installation upper part 16202. It is preferable to install it directly opposite to the conductor (conductive element) 16203 which is preferably installed in the middle. In the example shown in FIG. 12, the physical support 16101 has a spacer 16103 connected to a post 16102 and a lower part 16200 of the train.

 [0091] Both the pillar 16102 and the spacer 16103 are made of a conductive material. The strut 16102 is part of the support 16101 and functions functionally. In order to avoid a conductive path between the exciter and the electrical ground of the structure, the column 16102 and the spacer 16103 have a specific location (in this example, the column 16102 A dielectric insulator (not shown) is provided at a location adjacent to 16201 and a location where spacer 16103 is connected to excitation device 16100). Preferably, the strut 16102 is hollow and constructed of a conductive pair, and the spacer 16103 is constructed of a known metal bracket to increase strength.

 [0092] Spatial dimensions regarding the location and size of the exciter 16100 are very important. In order to use the exciter 16100 efficiently, the exciter 16100 must be installed closer to λ Ζ8 from the conductive element 16203 of the lower part 16200 of the train, at the highest frequency of use. .

 The excitation device 16100 is controlled by a controller network system (not shown) and supplied with electric power. In the transmit mode, the exciter 16100 energizes the conductor (conductive element) 16203.

 [0094] To “excite” the conductor 16203, electromagnetic energy is injected from a controller network system into a coaxial cable 16104 having a central conductor 16105 and a shield 16106. The center conductor 16105 is attached to the hemispherical excitation device 16100, and the shield 16106 is electrically connected to the spacer 16103, the conductor 16203, and the lower part 16200 of the train. As shown in FIGS. 12B and 12C, the shield 16106 is electrically connected directly to the conductor 16203 in the lower part 16200 of the train.

 [0095] For the highest operating frequency, the effective diameter of the hemispherical exciter 16100 is less than λ Ζ8, which is large enough to form a measurable shunt reactance for the input transmission line. If so, the structure is not required to be so strict.

The hemispherical excitation device 16100 has a hollow hemispherical portion 16107. The hollow hemispherical portion 16107 is formed of a conductor and has a rim portion 16108 at an end thereof. Prop 161 02 is directly connected (welded in this embodiment) to the hollow hemispherical portion 16107. A set of fan-shaped members 16109 having a predetermined angle extends outward and forward from the hollow hemispherical portion 16107, joins at the tip thereof, and is connected to the rim portion 16108 along the end portion. The non-conductive partition wall 16110 is made of acrylic resin, spreads laterally inside the hollow hemispherical portion 16111, contacts the inner surface of the fan-shaped member 16109, supports the structure, and forms a hollow hemispherical portion. The inside 16111 is separated into an upper half and a lower half.

 A matching circuit block 16112 is attached to the surface of the non-conductive partition wall 16110. The matching circuit block 16112 is connected to a coaxial cable 16104 extending along the spacer 16103. The other end of the coaxial cable 16104 is connected to the controller network system, and carries the excitation current directly to the excitation device 16100 and the matching circuit block 16112.

 [0098] The center conductor 16105 or an extension thereof is stretched from the controller network system to the exciter 16 100 to a supply point 16113 located at the apex of the sector member 16109 for conducting electrical signals using electrical conductors. The energy transmitted up to the supply point 16113 is a method in which the conductor is excited to “go” to radiate across the effective band of the transmitted signal. And the hollow hemispherical portion 16107 is excited. In light of the connection of the shield 16106 of the coaxial cable 16104 to the conductor 16204 in the ground and lower train 16200, the nature of the exciter 16100 at the selected frequency is not a bubble (" The net effect is the generation of an electromagnetic virtual space (similar to Faraday's trap) or the generation of weak and near-weak waves in a conductor.

 [0099] Next, another example of the excitation device 102m in the present embodiment will be described with reference to FIG. FIG. 13 (A) shows a top view of the excitation device 102m of this embodiment. FIG. 13 (B) shows a side view of the excitation device 102m of this embodiment. The same components as those shown in FIG. 12 are denoted by the same reference numerals and will not be described again here.

[0100] The excitation device 16500 of the present embodiment is a planar fan-shaped excitation device. The excitation device 102m of this embodiment shown in FIG. 13 is substantially two-dimensional, and the hemispherical excitation device 161 shown in FIG. The shape is similar to the cross section of 00 (three-dimensional excitation device). That is, it has the conductive trace 16501 whose shape substantially coincides with the cross-section along the plane of the hollow hemispherical portion 16107 of the hemispherical excitation device 16100 and the partition wall 16110 of the fan-shaped member 16109. The conductive trace 1650 1 is placed and supported on a planar structural plate 16502 formed of a nonconductive material. The central zone 16503 inside the conductive trace 16501 is a hollow or extension of the structural plate 16502. The structural plate 16502 is supported by the spacer 16103 in the same manner as the supporting method in the hemispherical excitation device 16100 (three-dimensional excitation device) shown in FIG. 12, and keeps a predetermined distance from the train lower portion 16200.

 [0101] The excitation device 16500 of the present embodiment includes a matching circuit block 16112 mounted on the structural plate 16502, and transmits energy from the central conductor 16105 of the coaxial cable 16104 to the supply point 161 13 while being shielded. Similar to the hemispherical exciter 16100, the 16106 is electrically connected along the spacer 16103 to the conductor 16504 present in the lower train 16200.

 [0102] The communication system according to the present embodiment of the present invention uses rails, wheels, and trains in which electromagnetic signals are excited by an excitation device even if the output of information signals such as audio 'image' data is kept within a weak power range. Propagating through the electric conductor of the car, stable communication can be realized. In addition, many of the parts such as wiring and terminals that have been used for wired communication in the train are unnecessary, and the weight of the train can be reduced.

 Example 4

 In the present embodiment, another example in which the communication system of the present invention is used for communication between trains will be described.

 [0104] Reference is made to FIG. FIG. 14 is a side view of the communication system of the present invention in this embodiment. In FIG. 14, for the convenience of explanation, the trains 100, 101, and 102 are shown inside.

The trains 100, 101, and 102 include transceivers 100e and 100h, transceivers 101e and 101h, and transceivers 102e and 102h, respectively. The transceivers 100e and 100h installed inside the train 100 are connected to the antennas 100k and 100i, respectively. Train 101 has the same configuration as train 100, and transceivers 101e and 101h Are connected to antennas 101k and 101i, respectively.

In the train 102, the transceiver 102e is connected to the antenna 102k. In addition, the transmitter / receiver 102h is an exciter installed in a metal part (electrically connected to the wheels 102a to 102d) of the lower part of the train 102 for video signals, audio signals, and various information signals. To supply.

 [0107] In the communication system of the present invention according to the present embodiment, three trains 100, 101 and 102 are used, and each train is provided with two trains. However, the number of transmitters and receivers is not limited to this.

 [0108] Here, bidirectional communication between the transceiver 102h of the train 102 and the transceiver lOOe of the train 100 will be described. The transceiver 102h supplies a signal such as a video signal to the excitation device 102m. Based on this information signal, the exciter 102m excites the conductors in the train 102 and excites the electrically connected rails 103 and 104. Signals such as video signals transmitted from the exciter 102m via the conductors in the train 102 to the rails 103 and 104 propagate through the rails 103 and 104, and the train 100 via the wheels 100a, 100b, 100c and 100d. Propagates to the metal part. In this way, the signal propagated to the metal part of train 100 is filled with an electromagnetic field called “quasi-static field” or “evanescent space”.

[0109] The antennas 100k and 1001 installed in the evanescent space filled in the train 100 receive signals and transmit them to the transceivers 100e and 100h, respectively. Then, the transmitters / receivers 100e and 100h receive the signals.

 In addition, the transceivers 100e and 100h supply signals such as video signals to the antennas 100k and 1001, respectively. Antennas 100k and 1001 transmit weak radio waves (radio waves with a maximum transmission field strength of 500 VZm at a point 3 m away from the transmitter at a transmission frequency of 322 MHz or less) to the evanescent space. In this embodiment, rod antennas are used for the antennas 100k and 1001.

[0111] The signal transmitted to the evanescent space propagates through the wheels 100a, 100b, 100c and 100d and the rails 103 and 104, and is received by the transceiver 102h via the excitation device 102m. [0112] In this way, bidirectional communication of signals such as video signals is performed between the transceiver 102h and the transceivers lOOe and lOOh.

 [0113] It should be noted that transmission / reception of video signals and the like between the transceiver 102h and the transceivers 101e and 101h and transmission / reception of signals such as video signals between the transceiver 102 and the transceiver 102e are also performed. Done in the same way.

 Next, refer to FIG. FIG. 15 shows a conceptual diagram of the communication system of the present invention according to the present embodiment. In FIG. 15, for convenience of explanation, a bidirectional communication between the transceiver 102h and the transceiver lOOe is described as an example. As shown in FIG. 15, in the communication system of the present invention according to this embodiment, bidirectional communication of signals such as video signals between the transmitter / receiver 102h and the transmitter / receiver lOOe is performed. This is achieved by propagating a conductive material such as a rail as a medium and forming an evanescent space in the train. In the present embodiment, the transceiver 102h includes a computer (PC) 102h-1, a modem 102h-2, and a frequency converter 102h-3. The transceiver 10 02h can be changed in design as long as it has a function of transmitting and receiving information such as video signals. In this embodiment, the excitation device 102 2m installed at the lower part of the train is the one shown in FIG. 12 or 13, but the one shown in FIG. 4 (B) can also be used.

 [0115] The transceivers 100e, 100h, 101e, 101h, and 102e have the same configuration as the transceiver 102h. FIG. 15 shows the configuration of the transceiver lOOe as an example. In this embodiment, the transceiver lOOe has a computer (PC) lOOe-1, a modem lOOe-2, and a frequency converter lOOe-3. Even if the transceiver lOOe has a function to send and receive information such as video signals, the design can be changed in a timely manner. A rod antenna was used as the antenna 100k.

 [0116] The computer lOOe-l in the transceiver lOOe centrally manages sensor information from train brakes, wind pressure motors, air conditioners, wheel temperature sensors, etc. in real time, and is similar to signals such as video signals. In addition, these sensor information may be transmitted and received.

[0117] In the communication system of the present invention in the present embodiment, the radio wave used for communication in the train is a radio wave using the evanescent space. We can suppress the emission of weak radio waves, and have the excellent effect that weak radio waves do not leak out of the wireless communication space (train)!

 Example 5

 [0118] In this embodiment, in the communication system of the present invention described in the above-described Embodiment 3 (Figs. 9 to 11), an antenna is installed near the rail and signals are transmitted and received from the outside. To do.

 [0119] Refer to FIG. FIG. 16 shows a schematic configuration diagram of the communication system of the present embodiment. In the communication system of the present embodiment, a signal is supplied from the transceiver 106 to the antenna 110 installed in the vicinity of the rail. In this embodiment, signals are exchanged using an evanescent space formed between the train lower part and the rail.

 [0120] Reference is made to FIG. FIG. 17 shows a schematic configuration diagram of the communication system of the present embodiment as viewed from the side. The transceiver 102h of the train 102 supplies a signal such as a video signal to the excitation device 102m. Based on this information signal, the exciter 102m excites the conductors in the train 102 and excites the electrically connected rails 103 and 104. At the same time, an evanescent space is formed between the lower part of the train 102 and the rail. The transceiver 106 supplies a signal to the antenna 110 and transmits the signal to the evanescent space. The transceiver 102h receives this signal via the exciter 102m. In this way, bidirectional communication between the transceiver 102 h and the transceiver 106 can be realized.

 [0121] Fig. 18 shows a conceptual diagram of the communication system of the present invention according to the present embodiment.

 As shown in FIG. 18, in the communication system of the present invention according to the present embodiment, bidirectional communication of signals such as video signals between the transmitter / receiver 102h and the transmitter / receiver 100e is performed between the train lower part and the rail. This is realized by forming an evanescent space. In the present embodiment, the transceiver 102h includes a computer (PC) 102h-1, a modem 102h-2, and a frequency converter 102h-3. If the transceiver 102h has a function of transmitting and receiving information such as video signals, the design can be changed in a timely manner. Further, in this embodiment, as the excitation device 102m installed at the lower part of the train, the one shown in FIG. 4 (B) using the one shown in FIG. 12 or 13 can be used.

[0122] As the antenna 110, a rod antenna was used. In place of antenna 110 Thus, the excitation device shown in FIGS. 12 and 13 may be used.

[0123] By installing this antenna 110 in the vicinity of the rail of the station, communication with the train arriving at the station becomes possible. However, in the communication system of the present invention in this embodiment, since the radio wave used for communication between the outside and the train is a radio wave using the evanescent space, a weak radio wave generated by an information signal such as a voice image, data, etc. Radiation can be suppressed and weak radio waves are out of the wireless communication space

 漏 れ and ヽ ぅ excellent effect.

[0124] By installing a plurality of antennas 110 on the route, the train position information can be grasped by communication when the train passes through the antenna. Alternatively, it can be applied to a location information management system.

 Example 6

 [0125] In the above-described embodiment and Examples 1 to 5, the example in which the communication system of the present invention is used for a train has been described. However, the communication system of the present invention is a mobile body (automobile, ship, submarine) other than a train. Or an aircraft).

 Industrial applicability

 [0126] The communication system of the present invention transmits the conductor excited by the exciter (exciter) even if the output of the information signal such as the audio 'image' data is kept within the weak power range, and the direct communication of the receiver. Propagation through a conductor as close as possible makes it possible to achieve stable communication despite the use of weak radio waves. In addition, it is possible to reduce many of the parts such as wiring and terminals that are necessary in the conventional wired communication technology, and to realize weight reduction.

 [0127] Further, in the present invention, the radio wave used for communication in the moving body is a radio wave using a pseudo electrostatic magnetic field, and therefore, the emission of a weak radio wave due to an information signal such as sound'image / data can be suppressed. Leaks out of the wireless communication space! /, And has an excellent effect.

 Therefore, the communication system of the present invention can be used for any mobile body including trains, cars, ships, and airplanes!

Claims

The scope of the claims

 [1] A moving body, a first transmitter / receiver, and the first transmitter / receiver are connected to the first transmitter / receiver, and an electric conductor in the moving body is excited based on a first signal transmitted from the first transmitter / receiver. A first exciter that receives the second signal transmitted in the movable body and transmits the signal to the first transceiver, and a second transceiver installed in the movable body. And, based on the second signal transmitted from the second transceiver and connected to the second transceiver, the conductor in the movable body is excited, and the conductive in the movable body is A second excitation device that receives the first signal transmitted from the body and transmits the first signal to the second transceiver.

 [2] A moving body, a first transmitter / receiver, and a first transmitter / receiver that are connected to the first transmitter / receiver to excite a conductor in the moving body based on a first signal transmitted from the first transmitter / receiver. , Generating a wireless communication space by a quasi-static non-propagating electromagnetic field in the moving body, receiving the second signal transmitted from the conductor force in the moving body, and transmitting to the first transceiver The first exciter, the second transmitter / receiver installed inside the mobile body, the first transmitter / receiver connected to the second transmitter / receiver, and receiving the first signal transmitted from the wireless communication space. A communication system comprising: an antenna that transmits to the second transceiver and transmits the second signal transmitted from the second transceiver to the wireless communication space.

[3] a first moving body, a second moving body electrically connected to the first moving body, a first transceiver installed inside the first moving body, and A first transmitter / receiver is connected to the first transmitter / receiver, and the first conductor in the first movable body is excited based on a first signal transmitted from the first transmitter / receiver. A first exciter that excites a second conductor, receives a second signal transmitted from the first conductor in the first moving body, and transmits the second signal to the first transceiver; A second transmitter / receiver installed inside the second moving body, and the second transmitter / receiver connected to the second transmitter / receiver and based on the second signal transmitted from the second transmitter / receiver. Exciting the second conductor in the second moving body to excite the first conductor in the first moving body; and Receiving said first signal transmitted from said second conductor of the mobile body, a communication system having a, a second excitation device for transmitting to the second transceiver.

[4] a first moving body, a second moving body electrically connected to the first moving body, a first transceiver installed in the first moving body, and A first transmitter / receiver is connected to the first transmitter / receiver, and the first conductor in the first movable body is excited based on a first signal transmitted from the first transmitter / receiver. Exciting the second conductor, generating a wireless communication space by a quasi-static non-propagating electromagnetic field in the second moving body, and transmitting from the first conductor in the first moving body A first exciter that receives the transmitted second signal and transmits the second signal to the first transceiver, a second transceiver installed in the second mobile body, and the second transceiver A first signal transmitted from the wireless communication space is received, transmitted to the second transceiver, and the second transmission / reception is received. Communication system comprising an antenna, a transmitting the second signal transmitted machine force to the wireless communication space.

 5. The communication system according to any one of claims 1 to 4, wherein the moving body is an automobile, a ship, a submarine, or an aircraft.

 [6] A train having a conductor installed on a rail and electrically connected to the rail, a first transmitter / receiver, connected to the first transmitter / receiver, and transmitted from the first transmitter / receiver Exciting the rail based on the first signal to excite the conductor in the train, receiving the second signal transmitted by the rail force, and transmitting the second signal to the first transceiver A first exciter, a second transmitter / receiver installed inside the train, and a second transmitter / receiver connected to the second transmitter / receiver and based on the second signal transmitted by the second transmitter / receiver. Exciting the rail in the train to receive the first signal transmitted from the conductor in the train and transmitting the first signal to the second transceiver. A communication system having two excitation devices.

[7] A train installed on a rail and having a conductor electrically connected to the rail, a first transceiver, and a train connected to the first transceiver to excite the rail, A radio communication space is generated in the train by a quasi-static non-propagating electromagnetic field by receiving the second signal transmitted from the rail. A first exciter that transmits to the transmitter / receiver, a second transmitter / receiver installed inside the train, and the second exciter connected to the second transmitter / receiver before being transmitted from the wireless communication space. An antenna that receives the first signal, transmits the second signal to the second transceiver, and transmits the second signal transmitted from the second transceiver to the wireless communication space. system.

 [8] A first train installed on the rail and having a first conductor electrically connected to the rail, and installed on the rail and electrically connected to the first train A second train having a second conductor; a first transceiver installed in the first train; and the first transceiver power transmission connected to the first transceiver. The first conductor in the first train is excited based on the first signal generated, and the second conductor in the second train is excited by exciting the rail. A first exciter that receives the second signal transmitted from the first train in the first train and transmits the second signal to the first transceiver, and an interior in the second train. A second transmitter / receiver installed in the second transmitter / receiver and connected to the second transmitter / receiver, Based on the above, the second conductor in the second train is excited, the rail is excited to excite the first conductor in the first train, and the second train A second exciter for receiving the first signal transmitted to the second transmitter / receiver and receiving the first signal transmitted by the second conductor force in the moving body;

[9] a first train having a first conductor installed on a rail and electrically connected to the rail; and installed on the rail and electrically connected to the first train A second train having a second conductor, a first transmitter / receiver installed inside the first moving body, and connected to the first transmitter / receiver, from the first transmitter / receiver; Based on the transmitted first signal, the first conductor in the first train is excited, and the second conductor in the second train is excited by exciting the rail. And generating a wireless communication space by a quasi-static non-propagating electromagnetic field in the second moving body, and transmitting the first electric force in the first moving body to the second signal And a first exciter that transmits to the first transceiver, and a second transceiver installed inside the second train, , Connected to the second transceiver, receiving the first signal transmitted from the wireless communication space, transmitting to the second transceiver, and transmitting from the second transceiver An antenna for transmitting a second signal to the wireless communication space. Stem.

The communication system according to claim 6, wherein the excitation device includes a capacitor and a resistance force connected in series.