JP2001025045A - Remote display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote display system capable of individually or simultaneously displaying an optional message at plural existing display devices installed at respectively different remote locations without the need of preparing new infrastructures. SOLUTION: This system is constituted of a message transmission terminal 1 connected through a telephone network 2 to a public pager system 3 and a pager 4 and a display ring adapter 5 connected to the respective existing display devices 6. The message transmission terminal 1 is at least provided with a means for performing division into the packets of an information amount transmittable by the transmission of one time of the public pager system and transmitting them and the display ring adapter 5 is at least provided with a means for connecting the received packets and restoring an original message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a remote display system,
More specifically, the present invention relates to a remote display system comprising a transmitting terminal and a plurality of display devices installed at different remote locations, and displaying a message simultaneously or individually on each display device by inputting a desired message from the transmitting terminal. .

[0002]

2. Description of the Related Art At present, for example, a display device installed at a railroad crossing only displays a predetermined very simple message such as "an up train passes" on an electronic display panel or the like. This is because it is difficult to maintain individual infrastructure in the track due to wiring difficulties and running costs. However, if a railroad accident occurs and the railroad crossing does not open for a long time, simply displaying a predetermined message such as "Up train passes" will not help, so you can easily install it However, a display system capable of displaying desired messages all at once or individually is being studied. The present invention relates to a remote display system used at such a railroad crossing or the like.

[0003] As a prior art related to this kind of remote display system, for example, Japanese Patent Laid-Open No. 62-181535 entitled "Wireless Information Display System" (referred to as a first prior art).
There is. The first prior art includes an input device, an encoder, a wireless transmitter, a wireless paging receiver, and a display unit,
A desired message is created by an input device, and the message is transmitted and displayed using an own paging wireless transmission / reception device. When this system is used for the above-mentioned remote display system for railroad crossing, a message is transmitted wirelessly. It is not necessary to lay wiring in the track because it is possible,
It is necessary to prepare its own paging wireless transmitting and receiving device as the infrastructure, and the receiving device must be a device that can receive messages simultaneously or individually on a plurality of display devices installed at different remote locations. It is difficult to implement in terms of cost due to the need to acquire radio frequencies and to construct a new infrastructure of considerable scale.

[0004] Japanese Patent Application Laid-Open No. 5-227317 discloses a display device utilizing a bubble pager (pager) system, which is referred to as a "wireless telemeter device" (referred to as second prior art). According to the second prior art, data indicating the parking status of a parking lot is collected, converted into a character code using characters that can be transmitted by a pager system, transmitted, and displayed on a pager character display unit. Further, the displayed character is optically read, the code indicated by the character string is decoded, the display information is taken out from the storage unit storing the display information corresponding to the code, and displayed on the display unit. When this second prior art is used for the above-mentioned remote display system for railroad crossing,
There is no need to perform wiring in the railway track, and the use of a public pager system facilitates the maintenance of infrastructure and eliminates the need to acquire a dedicated radio frequency.

[0005]

When it is desired to construct a remote display system used for a railroad crossing as described above, a fixed or arbitrarily created message is displayed on each type of display device installed at a plurality of different remote locations. It is necessary to use a system that can display various data at the same time or individually, and it is desirable to use a wireless system using a public pager system because it is installed in a railway track. However, in a public pager system that is generally widely used, when the amount of information that can be transmitted at a time is within 100 bytes and the capacity is relatively low, it is necessary to transmit a long message (for example, when an accident occurs). The sender must divide the long message by himself and repeat the transmission action (the operation of inputting the pager telephone number from the telephone and inputting the divided message in response to receiving the pager call) as many times as necessary. Would be complicated and inaccurate.
In addition, if existing display devices used for railroad crossings can be used as they are, there is no need to develop new infrastructure, but existing display devices are diverse and it is not possible to construct an appropriate system simply by using a public pager system .

The present invention has been made to solve such a problem, and an object of the present invention is to provide a remote display system particularly suitable for a railroad crossing.

[0007]

SUMMARY OF THE INVENTION A remote display system according to the present invention converts a message connected to a public pager system via a telephone network into a code signal used in the public pager system and transmits the converted signal. A pager that is connected to a transmitting terminal and an existing display device installed at a different remote location, receives a wireless code signal from the public pager system, and converts the received code signal into character display data to be displayed on the display device. A display ring adapter, wherein the message transmitting terminal includes means for dividing at least the created message into packets of an amount of information that can be transmitted in one transmission of the public pager system, and transmitting the divided message. Ring adapter at least in front When receiving the code signal divided into a plurality of packets through a pager, and further comprising a means for restoring the combine these packets original message.

When transmitting the message in response to a transmission command, the message transmitting terminal automatically dials an access point of the public pager system and detects an input wait signal returned by the connected public pager system. In this case, a means for automatically transmitting one packet is provided. Further, the automatic transmission is performed individually for a plurality of pagers or simultaneously for a plurality of pagers. The display ring adapter includes a code conversion table, and when an input code signal includes an audio output code, converts the code into an audio signal and sends the code to an audio output device connected to the display device. It is characterized in that it is configured to be. Further, the display ring adapter is provided with a means for displaying a corresponding message preferentially on the display device when the input code signal includes an emergency display code. Further, this remote display system is characterized in that it is a crossing remote display system.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the remote display system of the present invention. FIG.
Is a message transmission terminal 1 composed of a personal computer or the like having a built-in modem (not shown) for connecting to a telephone network 2, a public telephone or a mobile telephone to which the message transmission terminal 1 is connected. , Satellite phone,
A telephone network 2 such as a packet telephone and a PHS, a public pager system connected to the telephone network 2 (only the base station 3 is shown in FIG. 1), and a radio code signal transmitted from the base station 3 are respectively transmitted. A pager 4 received at an installation location, a display ring adapter 5 for converting / editing and outputting a code signal received by the pager 4 to data suitable for a connected display device, and various existing (LED, magnetic inversion, FT) (A tube type, LCD, etc.). Note that the number of receivers constituted by the pagers 4, the display adapters 5, and the display devices 6 is equal to the number of the display devices 6.

The message transmitting terminal 1 converts an input message into a code signal used in a public pager system, divides the input message into packets of the number of bytes that can be transmitted in one transmission of the pager system, and responds to a transmission command. And automatically transmits a packet together with the pager number of each destination pager 4 when the pager system performs handshake. The above-mentioned message is usually prepared in advance except in the case of an emergency or the like, and is transmitted in response to a transmission command input from an input device when necessary or a transmission command output by the message transmitting terminal 1 at predetermined time intervals. The message terminal device 1 can monitor the digit of the created message and the display control code, and in the case of a long sentence, disperse the message into a plurality of packets and assign, for example, a serial number to the message terminal device 1. Automatic dialing is repeated until transmission of all attached packets is completed. These functions are configured to operate with built-in software.

The radio code signal received by each pager 4 via the base station 3 of the public pager system is converted / edited by the display adapter 5 into display data suitable for each connected display device, and is converted to display data by each display device. Display the desired message.

FIG. 2 is a block diagram showing an embodiment of the configuration of the display adapter 5. The display adapter 5 includes an interface 51 for the pager 4.
And a reception memory 52 for storing the code signal received by the pager 4, and a CPU 53 for controlling the whole.
And a code conversion table for converting a message represented by a code signal into character data that can be displayed, or, when a voice output code is included, converting the code into a voice signal (including a signal for synthetic voice). And an interface 55 for the existing display device 6.

The display adapter 5 is configured as described above. The CPU 53 converts the code signal stored in the reception memory 52 through the pager IF 51 into a protocol suitable for display on the display device 6, and converts the code signal. Transfer to table 54. In this case, if the code signal extends over a plurality of packets, the code signal is held in the reception memory 52 until all the packets are received, and as soon as all the packets are ready, the CPU 53 edits (combines).
Is transferred to the code conversion table 53, converted into displayable character data, and sent to the display device IF 55. In this case, if the audio signal is included in the code signal, it is converted into an audio signal. If the emergency signal is included, the message is displayed with priority.

Although the above embodiment has been described as a level crossing remote display system, it goes without saying that the remote display system of the present invention is not limited to level crossing.

[0015]

As described above, the remote display system of the present invention has a message transmitting terminal for dividing a created message into packets of the number of bytes that can be transmitted by one transmission of the public pager system and automatically transmitting the divided message. Therefore, a public pager system can be used for the transmission system, and a system for transmitting various messages simultaneously or individually without displaying a new infrastructure and displaying the messages on display devices installed at different remote locations. it can. Further, since a display ring adapter is provided on each display device side, various existing display devices can be used. Further, there is an effect that a remote display system suitable for takeoff can be obtained, for example, an emergency display, a voice display, and the like can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of a remote display system of the present invention.

FIG. 2 is a block diagram showing an embodiment of the configuration of the display ring adapter shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 message transmitting terminal 2 telephone network 3 base station 4 pager 5 display ring adapter 6 display device 51 pager IF 52 reception memory 53 CPU 54 code conversion table 55 display device IF

Claims (6)

[Claims] 1. A message transmitting terminal which is connected to a public pager system via a telephone network to convert a created message into a code signal used in the public pager system and transmits the converted signal, and an existing terminal installed at a different remote location. And a display ring adapter that is connected to the display device and receives a wireless code signal from the public pager system, and a display ring adapter that converts the received code signal into character display data to be displayed on the display device. Means for splitting at least the created message into packets of an amount of information that can be transmitted in one transmission of the public pager system, and transmitting the divided message. The display adapter adapts to at least a plurality of packets via the pager. Split code When receiving the items, the remote display system, characterized in that it comprises means for restoring by combining these packets into the original message. 2. The remote display system according to claim 1, wherein the message transmitting terminal automatically dials an access point of the public pager system when transmitting the message in response to a transmission command, and is connected to the public pager. A remote display system comprising means for automatically transmitting one packet each time an input waiting signal tone returned by the system is detected. 3. The remote display system according to claim 2, wherein said automatic transmission is performed individually for a plurality of pagers or simultaneously for a plurality of pagers. 4. The remote display system according to claim 1, wherein the display ring adapter includes a code conversion table, and when the input code signal includes an audio output code, converts the code into an audio signal. A remote output system connected to the audio output device connected to the display device. 5. The remote display system according to claim 1, wherein when the input code signal includes an emergency display code, the display ring adapter displays a corresponding message preferentially on the display device. A remote display system comprising: 6. The remote display system according to claim 1, wherein the remote display system is a level crossing remote display system.