JP2002111609A - Ground digital broadcast system for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable various signals such as radio waves, television signals, data signals, and sound signals, which contain less noises and are kept at a certain intensity level so as to obtain stable images, to be sent into railway vehicles such as streetcars and trains. SOLUTION: A ground digital broadcast system, which is provided for railway vehicles, receives digital radio wave signals (information) through a roof antenna installed on the roofs of the railway vehicles such as streetcars and trains, amplifies them, and enables the amplified digital radio wave signals to be received with receivers disposed in the railway vehicles or provides the received digital radio wave signals as information in the vehicles in corporation with information control devices (system) installed in the vehicles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting a digital radio signal (information) such as a digital broadcast radio signal, a communication information radio signal, a traffic information radio signal, a disaster prevention information radio signal, etc., in a railway vehicle such as a train or a train. The present invention relates to a digital terrestrial broadcasting system for a railway vehicle to be incorporated into a vehicle.

[0002]

2. Description of the Related Art Digitization of broadcasting has already started with CS broadcasting, and BS broadcasting is scheduled for December 2000 and terrestrial broadcasting is scheduled for mid-2000. Most notably, the current analog television system will be discontinued in 2010 (reference: published in the Asahi Shimbun on August 18, 1999).

[0003] The reason for changing from the analog system to the digital system has been argued for reasons of convenience and policy. For vehicles (vehicles) such as trains, trains, etc., they are as beautiful and stable as in houses and buildings even during running. It is desirable to be able to receive the video that has been transmitted.

In order to receive CS broadcasts and BS broadcasts on vehicles such as trains and trains, heavy and expensive antennas having a tracking mechanism must be installed on a roof or the like.

Further, terrestrial waves to be broadcasted from now on are based on OFDM (Orthogonal Frequency) of a modulation system of the most advanced technology.
Division Multiplexing), broadcast frequency system SFN
(Single Frequency Network) enables reception with a simple antenna. As a receiving system for this terrestrial digital television broadcast, for example, "modification and conversion of Yamanote line teletext system (205 system, 6 doors)" and "AM.
Modification and conversion of FM radio relay device (209 series etc.) ".

FIG. 9 shows a schematic configuration of the "modification / diversion of the Yamanote Line Teletext System (205 system, 6 doors)". 9, reference numeral 100 denotes a vehicle, 101 denotes a television (TV) antenna (rooftop), 102 denotes a teletext receiver, 103 denotes a switcher, and 104 denotes a digital video tape recorder (V
TR) and 105 are television (TV) receivers.

[0007] The modification of the "modification and conversion of the Yamanote line teletext system (205 system, 6 doors)" is as follows. (1) The rooftop television (TV) antenna 101 is a terrestrial digital antenna. (2) Currently, the teletext receiving unit 102 and the switcher 10
3 is stored in one box, and this part is replaced with a dedicated receiver.

The above-mentioned “Modification of AM / FM radio relay apparatus
FIG. 10 shows a schematic configuration of “diversion (209 system or the like)”. FIG.
At 0, 100 is a vehicle, 201 is a rooftop television (T
V) An antenna receiving unit, 202 is a starter, and 203 is a ceiling loop antenna.

[0009] The above-mentioned "Modification of AM / FM radio repeater /
Of "Diversion (209 series, etc.)" is the rooftop TV (TV)
The antenna receiver 201 and the starter 202 are exchanged.

[0010]

However, radio waves or television signals, information data, and audio signals having a fixed intensity and a small amount of noise so that a stable image can be obtained even with a normal digital television receiver are transmitted to a railway car. There were various problems in sending it into the inside.

In addition, the conventional terrestrial digital television receiver has a problem that the image is not displayed in the shadow of a building during traveling.

Further, there is a problem that replacing the currently used receiving device for terrestrial analog television radio wave broadcasting (current broadcasting) with a digital television receiving device requires a huge amount of cost.

An object of the present invention is to incorporate digital radio signals (information) such as digital broadcast radio signals, contact information radio signals, traffic information radio signals, disaster prevention information radio signals, etc. into railway vehicles such as trains and trains. Is to provide a possible technology.

Another object of the present invention is to transmit a radio signal or a television signal, a data signal, or a sound signal having a constant intensity and a small amount of noise so as to obtain a stable image to a railway vehicle such as a train or a train. It is to provide a technology that can be sent inside.

Another object of the present invention is to provide a railway vehicle such as a train or train without having to install a heavy and expensive antenna having a tracking type mechanism on a roof or the like in order to receive CS broadcasts and BS broadcasts. To provide good technology.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0017]

The following is a brief description of the outline of the invention disclosed in the present application. (1) A digital radio signal (information) is received by a roof antenna provided on the roof of a vehicle such as a train or a train, and the digital radio signal received by the roof antenna is amplified. This is a terrestrial digital broadcasting system for a railway vehicle that receives a radio signal with a receiving device installed in a vehicle or provides the information inside the vehicle in cooperation with the information management device (system) in the vehicle.

(2) A digital radio signal (information) is received by a roof antenna provided on the roof of a vehicle such as a train or a train, and the digital radio signal received by the roof antenna is amplified. The received signal is received by an in-vehicle radiation antenna that radiates into a vehicle, and the digital radio signal received by the in-vehicle radiation antenna is received by a receiver installed in the vehicle or the reception signal is received. This is a terrestrial digital broadcasting system in a railway vehicle that provides information in a vehicle in cooperation with an information management device (system) in the vehicle.

(3) In the roof antenna, a metal loop wire for an antenna is provided on a metal plate on a roof of a vehicle body such as a train or a train with an insulator (insulating elastic body) and an insulator bush interposed. And an insulator (insulating elastic body) is provided thereon.

(4) The shape of the antenna metal wire is a loop shape or a radial shape.

(5) The receiving device is one of a radio, a television receiver, a display device, and a computer.

(6) The information management device is an information recording (storage) device or a computer.

(7) The digital radio signal (information)
Is at least one of a digital broadcast radio signal, a contact information radio signal, a traffic information radio signal, and a disaster prevention information radio signal.
One.

(8) A digital broadcast radio signal is received by a roof antenna provided on the roof of a vehicle such as a train or train, and the digital broadcast radio signal received by the roof antenna is amplified. This is a terrestrial digital broadcast receiving method in a railway car in which a digital broadcast radio signal is converted into an analog signal, the signal converted into the analog signal is channel-selected, and the channel-selected signal is received by a receiver.

(9) A rooftop antenna provided on the roof of a railcar such as a train or train and receiving a digital broadcast radio signal, an amplifier for amplifying the digital broadcast radio signal received by the rooftop antenna, A digital / analog converter for converting the amplified digital signal into an analog broadcast radio signal, a channel selecting tuner for channel selecting the signal converted to the analog signal, and receiving a signal selected by the channel selecting tuner. A terrestrial digital broadcast receiving device in a railway vehicle including a receiving device.

(10) A rooftop antenna provided on the roof of a railcar such as a train or a train for receiving a digital broadcast radio signal, an amplifier for amplifying the digital broadcast radio signal received by the rooftop antenna, A digital / analog converter for converting the amplified digital signal into an analog broadcast radio signal, an in-vehicle radiation antenna for radiating the signal converted to the analog signal into a vehicle,
Digital terrestrial broadcast reception in a railway vehicle, comprising: a channel selection tuner that receives the analog signal from the in-vehicle radiation antenna and performs channel selection, and a receiving device that receives a signal that is channel-selected by the channel selection tuner. Device.

According to the above-mentioned means, each signal such as a radio signal, a data signal, a sound signal, and the like having a constant intensity and a small amount of noise so that a stable image can be obtained is taken into a moving body (vehicle). be able to.

A digital terrestrial television signal,
It is possible to instantly view and listen to the data signal and the broadcast program of the sound signal as stable images and characters.

Hereinafter, the present invention will be described in detail with reference to the drawings together with embodiments (examples). In all the drawings for describing the embodiments (examples), those having the same functions are denoted by the same reference numerals, and their repeated description will be omitted.

[0030]

(Embodiment 1) FIG. 1 is a schematic diagram showing a schematic configuration of a terrestrial digital broadcasting system in a railway vehicle according to Embodiment 1 of the present invention, and FIG. FIG. 2 is a functional block diagram illustrating a functional configuration of the broadcasting system.

As shown in FIG. 1, the digital terrestrial broadcasting system for a railway car according to the first embodiment is provided on a top surface (a predetermined position of a roof) of a metal plate provided on a roof of a vehicle body of a railway car 100 such as a train or a train. For example, an omnidirectional rooftop antenna 1A and an electric signal processing unit dedicated to receiving digital terrestrial television signals, data signals, and sound signals in order to project stable images and characters and to listen to audio. One box 1 containing 1B is attached.

As shown in FIG. 2, a rooftop antenna 1A and an electric signal processing unit 1B housed in the one box 1 are provided with a digital radio wave receiving unit 12 for receiving a digital radio wave from the antenna unit 11 of the rooftop antenna 1A. And an amplifier 13 (or channel selection amplification) for amplifying the received radio wave. The amplified digital radio wave reception is sent into the vehicle 100 and transmitted to a digital receiver 2 (for example, a digital television receiver) having a channel selecting tuner arranged in the vehicle 100. That is,
A radio wave or a television signal, a data signal, and a sound signal, each of which has a constant intensity and a small amount of noise so that a stable image can be obtained, can be sent into the railway vehicle.

(Embodiment 2) FIGS. 3A and 3B are schematic diagrams showing a schematic configuration of a terrestrial digital broadcasting system in a railway vehicle according to Embodiment 2 of the present invention, wherein FIG. 3A is a side view, and FIG. FIG. 3C is a functional block diagram showing a functional configuration.

The digital terrestrial broadcasting system for a railway vehicle according to the second embodiment is, as shown in FIG.
The radiation loop antenna 15 for radiating the amplified digital signal of the rooftop antenna 1A and the electric signal processing unit 1B into the vehicle 100 is looped over the ceiling or under the floor in the vehicle 100. Things. The conductor of the radiation loop antenna 15 is preferably separated from the metal constituting the vehicle body by 5 cm or more, and the loop is preferably large.

The amplified digital signal is radiated from the radiating loop antenna 15 into the vehicle 100,
The radiated digital signal is received by a receiving unit 14 of a digital receiving device 2 (for example, a digital television receiver) disposed in the vehicle 100, and is channel-selected by a tuner. Can hear.

(Embodiment 3) FIGS. 4A and 4B are schematic diagrams showing a schematic configuration of a terrestrial digital broadcasting system in a railway vehicle according to Embodiment 3 of the present invention, wherein FIG. 4A is a side view, and FIG. FIG. FIG. 5 is an enlarged view of a portion surrounded by a circle A in FIG.

As shown in FIG. 4, the terrestrial digital broadcasting system for a railway vehicle according to the third embodiment is different from the second embodiment.
As the antenna unit 11 of the roof antenna 1A, a roof receiving loop antenna 16 is provided on a metal plate on the ceiling (below the roof) of the vehicle 100 via an insulator.

The roof receiving loop antenna 16 is shown in FIG.
As shown in FIG. 5, an antenna (elastic insulator: insulating rubber) 16B and an insulator bush 16C are interposed on a metal plate 16A provided on the top of the body of a vehicle such as a train or train, and a metal wire 16D for an antenna is provided. As shown in FIGS. 6A and 6B, a metal foil tape or a conductive paint wire is provided in a loop or a cross (radial), and an insulator (elastic insulator: insulating rubber) is provided thereon. ) 16E are provided.
With such a configuration, the appearance of the railway vehicle 100 can be beautiful.

A radiating loop antenna 15 extending under the ceiling or floor of the railway vehicle 100 radiates into the vehicle 100, and the radiated digital signal is transmitted to the vehicle 10.
The digital video signal is received by the receiver 14 of the digital receiver 2 (for example, a digital television receiver) arranged in the channel 0, the channel is selected by the tuner, and the digital image is displayed and the sound can be heard.

(Embodiment 4) FIG. 7 is a functional block diagram showing a functional configuration of a terrestrial digital broadcasting system in a railway vehicle according to Embodiment 4 of the present invention.
18 is a computer.

As shown in FIG. 7, the digital terrestrial broadcasting system for a railway vehicle according to the fourth embodiment is similar to that of the first embodiment.
The digital signal output from the amplifier 13 or the digital signal radiated from the radiating loop antenna 15 is received by the receiving unit 14 of the digital receiving device 2 and the received digital signal is recorded in the recording device (information management device) 17. Alternatively, by storing the digital terrestrial radio wave signal in the railway vehicle by storing it in the storage unit of the computer (information management device) 18, various information processing and management are performed. For example, various digital radio signals (information) such as a digital broadcast radio signal, a communication information radio signal, a traffic information radio signal, a disaster prevention information radio signal, and the like are taken into a railway vehicle and processed and managed. Acquisition of information, notification of disaster prevention information, and the like can be performed.

(Embodiment 5) FIG. 8 is a functional block diagram showing a description configuration of a terrestrial digital broadcast receiving system according to Embodiment 5 of the present invention.

As shown in FIG. 8, the terrestrial digital broadcast receiving system for a railway vehicle according to the fifth embodiment has a digital signal output from the amplifier 13 or a digital radio wave radiated from the radiating loop antenna 15 according to the first to fourth embodiments. A digital / analog (D / A) converter 19 for converting a signal into an analog signal (signal processing) is added to an analog receiving device (for example, an analog television receiving device) arranged in the railway vehicle 100, and the railway vehicle The output digital signal of the amplifier 13 or the radiated digital signal sent into the 100 is received by a receiving section of an analog receiving device arranged in the railway vehicle 100, and a channel is selected by a tuner, and a digital image is obtained. It is displayed and you can hear the sound.

As described above, the present invention has been specifically described based on the above-described embodiment. However, the present invention is not limited to the above-described embodiment, and may be variously modified without departing from the gist thereof. Of course.

[0045]

The effects obtained by the invention disclosed in the present application will be briefly described as follows. (1) terrestrial digital broadcasting radio signals or digital television signals, data signals,
Each voice signal can be sent into the railcar.

(2) In a mobile unit (especially a train or train), a heavy and expensive antenna having a tracking mechanism may not be installed on a roof or the like in order to receive a CS broadcast and a BS broadcast.

(3) Since the terrestrial digital radio signal is sent into the railcar, various information processing and management can be performed.

(4) Digital terrestrial television signals,
Each broadcast program of the data signal and the sound signal can be instantly viewed as a stable video or character, and the sound can be heard.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a schematic configuration of a terrestrial digital broadcast receiving system in a railway vehicle according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram illustrating a functional configuration of a terrestrial digital broadcast receiving system of a railway vehicle.

FIG. 3 is a schematic diagram illustrating a schematic configuration of a terrestrial digital broadcast receiving system in a railway vehicle according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a schematic configuration of a terrestrial digital broadcast receiving system in a railway vehicle according to a third embodiment of the present invention.

FIG. 5 is an enlarged view of a portion surrounded by a circle A in FIG. 4;

FIG. 6 is a view showing the shape of the antenna metal wire shown in FIG. 5;

FIG. 7 is a functional block diagram illustrating a functional configuration of a terrestrial digital broadcast receiving system in a railway vehicle according to a fourth embodiment of the present invention.

FIG. 8 is a functional block diagram illustrating a functional configuration of a terrestrial digital broadcast receiving system in a railway vehicle according to a fifth embodiment of the present invention.

FIG. 9 is a schematic diagram showing a schematic configuration of a conventional “remodeling / diverting of Yamanote Line Teletext System (205 system, 6 doors)”.

FIG. 10: Modification of conventional “AM / FM radio relay device”
It is a schematic diagram which shows the schematic structure of "diversion (209 system etc.)."

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 vehicle (moving body) 1 box 1A omnidirectional roof antenna 1B electric signal processing unit 2 digital receiving device 11 antenna unit 12 digital radio wave receiving unit 13 amplifier 14 reception unit of digital receiving device 15: Loop antenna for radiation 16: Roof loop antenna 16A: Metal plate 16B: Insulator (elastic insulator: insulating rubber) 16C: Insulator bush 16D: Metal wire for antenna 16E: Insulator (elastic insulator: insulating rubber) 17) Recording device 18 ... Computer 19 ... Digital / analog converter 101 ... TV (TV) antenna (rooftop) 102 ... Teletext receiver 103 ... Switcher 104 ... Digital video tape recorder (VTR) 105 ... TV (TV) 201 … Rooftop TV (TV) antenna receiver 202… Starter 203 Rooftop loop antenna

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04B 1/16 H04B 1/16 Z 5K061 H04N 5/44 H04N 5/44 Z 7/08 B61L 25/02 A 7/081 H04B 1/04 L // B61L 25/02 H04N 7/08 Z H04B 1/04 (71) Applicant 300059577 Tex Co., Ltd. 1-9-15 Tabata Shinmachi, Kita-ku, Tokyo Yama-Tabata Corporation 302 (72) Invention Person Kazunori Hasebe 2-2-2 Yoyogi, Shibuya-ku, Tokyo, Japan East Japan Railway Company (72) Inventor Tohru Kajita 2-2-2, Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72 ) Inventor Yoshio Maekawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Torao Aozuka 3-1-1, Someji, Chofu-shi, Tokyo 180 Aoto Co., Ltd. (72) Inventor Terunuma Kazuhiko 1-9-15-1 Tabata Shinmachi, Kita-ku, Tokyo F-term in Tex Co., Ltd. (reference) 5C025 AA21 AA30 BA18 BA27 CA03 CB10 DA01 DA04 DA05 DA07 5C063 AB03 AC01 AC05 CA36 5H161 AA01 DD12 DD21 GG04 GG11 GG22 GG24 5J046 AB07 AB11 MA09 5K060 AA12 BB08 CC04 CC12 CC13 DD03 DD04 DD05 FF06 H03 FF06 BB06 FF06 BB06

Claims (11)

[Claims] 1. A digital radio signal (information) is received by a roof antenna provided on the roof of a vehicle such as a train or train, and the digital radio signal received by the roof antenna is amplified. Terrestrial digital broadcasting in a railway vehicle, wherein the digital radio signal is received by a receiving device installed in the vehicle, or the received signal is provided in the vehicle in cooperation with an information management device (system) in the vehicle. system. 2. A digital radio signal (information) is received by a roof antenna provided on the roof of a vehicle such as a train or train, and the digital radio signal received by the roof antenna is amplified. The received signal is received by an in-vehicle radiating antenna that radiates into the vehicle, and the digital radio signal received by the in-vehicle radiating antenna is received by a receiving device installed in the vehicle, or the received signal is received in the vehicle. A digital terrestrial broadcasting system for a railway vehicle, wherein information is provided in a vehicle by cooperating with an information management device (system). 3. The rooftop antenna is provided with a metal loop wire for an antenna on a metal plate on a roof of a vehicle body in a railcar such as a train or a train with an insulator (insulating elastic body) and an insulator bush interposed. 3. The terrestrial digital broadcasting system for a railway vehicle in a moving body according to claim 1, wherein an insulator (insulating elastic body) is provided thereon. 4. The digital terrestrial broadcasting system according to claim 3, wherein the shape of the antenna metal wire is a loop shape or a radial shape. 5. The receiving device according to claim 1, wherein the receiving device is a radio, a television receiver,
5. The display device according to claim 1, wherein the display device is a computer.
13. A terrestrial digital broadcasting system for a railway vehicle according to the paragraph. 6. The terrestrial digital broadcasting system in a railway vehicle according to claim 1, wherein the information management device is an information recording (storage) device or a computer. 7. The digital radio signal (information) is at least one of a digital broadcast radio signal, a contact information radio signal, a traffic information radio signal, and a disaster prevention information radio signal. 7. A terrestrial digital broadcasting system for a railway vehicle according to any one of the items 6. 8. A rooftop antenna provided on a vehicle body roof of a railway vehicle such as a train, a train, etc., for receiving a digital broadcast radio signal, an amplifier for amplifying the digital broadcast radio signal received by the roof antenna, and the amplifier A digital / analog converter for converting the converted digital signal into an analog broadcast radio signal, a channel selection tuner for channel selecting the signal converted to the analog signal, and a reception for receiving a signal selected by the channel selection tuner A terrestrial digital broadcast receiving apparatus in a railway vehicle, comprising: 9. A rooftop antenna provided on the roof of a vehicle such as a train or a train for receiving a digital broadcast radio signal, an amplifier for amplifying the digital broadcast radio signal received by the rooftop antenna, and the amplifier A digital / analog converter for converting the converted digital signal into an analog broadcast radio signal, an in-vehicle radiating antenna for radiating the signal converted into the analog signal into a vehicle, and a signal from the in-vehicle radiating antenna. A terrestrial digital broadcast receiving apparatus in a railway vehicle, comprising: a channel selecting tuner for receiving an analog signal to select a channel; and a receiving apparatus for receiving a signal selected by the channel selecting tuner. 10. The roof antenna has a metal loop wire for an antenna provided on a metal plate on a roof of a vehicle body in a railway car such as a train or a train with an insulator (insulating elastic body) and an insulator bush interposed. 10. The terrestrial digital broadcast receiving apparatus in a railway car according to claim 8, wherein an insulator (insulating elastic body) is provided thereon. 11. The terrestrial digital broadcast receiving apparatus according to claim 4, wherein the shape of the antenna metal wire is a loop shape or a radial shape.