JPH0635423A - Information display board display system - Google Patents

Abstract

PURPOSE:To provide the information display board display system which automatically redisplays information on an information display board when the information display board recovers after being out of order for a short time. CONSTITUTION:The information display board fault deciding part 122 of a center 1 monitors state information sent from the information display board 2 through a transmission line 3 and actuates a redisplay control request part 12 when the time from the occurrence of a fault to the information display board 2 to its recovery is shorter than a specific time. The redisplay control request part 124 reads final display data, displayed before the information display board 2 gets out of order, out of a memory part 125 and supplies the data to a control part 121. The control part 121 sends the given final display data to the information display board 2 through the transmission line 3 to redisplay the display data on the information display board 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display board display system which is incorporated in a road information system, a distant monitoring control system and the like and which displays information on an information display board at a remote place by control from the center.

[0002]

2. Description of the Related Art Conventionally, this type of system displays road traffic information and the like on an information display board at a remote place according to a command from an operator of a center that collects road traffic information and the like. If the information display board at the remote location fails due to a power failure or the like (there are various causes such as a momentary power failure or device abnormality), the display contents displayed on the information display board until then disappear. However, even if the failure condition is immediately removed and the information display panel returns to normal, nothing is displayed on the information display panel unless the operator at the center again performs the redisplay operation. . In particular, even if the information display board fails for a short time due to a momentary power failure (a momentary power failure and immediate recovery), the above-mentioned display contents that have disappeared once are to be displayed again. As described above, the operation of the center operator is always necessary, and when the operator does not notice the failure, the operator does not see any indication on the information display board even if he thinks the indication is on. There was such an inconvenience.

[0003]

In the conventional information display board display system as described above, once a failure occurs in the information display board at a remote place, this failure condition is removed and the information display board returns to normal. However, in order to re-display the display contents that have disappeared due to the failure, the operation of the center operator was necessary. Therefore, when the operator does not notice the failure, the operator has the inconvenience that no information is displayed on the information display plate even if he thinks that the display is displayed, and the reliability of the system is low. There was a drawback.

Therefore, the present invention eliminates the above-mentioned drawbacks and provides an information display board display system capable of automatically re-displaying information on the information display board when the information display board fails and recovers for a short time. The purpose is to do.

[0005]

The present invention displays the display data on the information display board by sending the display data from the central control unit to the information display board via a transmission path.
In the information display board display system, which controls the information display board to send status information indicating whether the information display board is faulty or normal to the central control unit through the transmission path, setting means for setting a predetermined time, and the information display board. The storage means for storing the final display data displayed on the display, and the time from the failure of the information display board to the normal recovery based on the status information sent from the information display board are set in the setting means. Determination means for determining whether or not it is within a predetermined time, and the storage means when it is determined by the determination means that the time from failure of the information display plate to normal restoration is within the predetermined time And a control means for reading the final display data from the device and sending the final display data to the information display board via the transmission path.

[0006]

In the information display board display system of the present invention, the setting means sets a predetermined time when operated by the operator. The storage means stores the final display data displayed on the information display board. The determining means determines whether or not the time from the failure of the information display plate to the normal recovery is within the predetermined time set in the setting means based on the status information sent from the information display plate. To do. When the determination means determines that the time from the failure of the information display plate to the normal recovery is within the predetermined time, the control means reads the final display data from the storage means, and reads it. It is sent to the information display board via a transmission line.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the information display board display system of the present invention. A center 1 collects road traffic information and the like, and an operator monitors, controls and maintains the information display board. The information display board 2 is connected to the center 1 via a transmission line 3. Although only one information display plate 2 is shown in this example for simplification, a plurality of information display plates are actually connected to the center 1. Further, the center 1 is composed of a console 11 through which an operator inputs various kinds of information and control commands, and a central control unit 12 for controlling display of the information display board 2 and monitoring control. The central control device 12 controls the information display board 2 to transmit display data to the information display board 2 and the information display board 2
The information display board failure determination unit 122 that determines the short-term failure of the information display board 2 by inputting monitoring information from the information display unit, the timer unit 123 that supplies the time information to the information display board failure determination unit 122, and the information display on the control unit 121 It has a redisplay control request section 124 for issuing a redisplay control request to the board 2 and a memory section 125 for storing an information board display table in which various information related to the information display board 2 is tabulated.

Next, the operation of this embodiment will be described. The operator of the center 1 inputs display data to be displayed on the information display board 2 from the console 11 to the control unit 121, and then issues a display command. As a result, the control unit 121 sends the input display data to the information display board 2 via the transmission path 3 and displays the data on the information display board 2. On the other hand, the information display board 2 constantly sends its own status information (failure or normal) to the information display board failure determination unit 122 of the central controller 12 via the transmission path 3. When the information display board failure determination unit 122 writes the sent status information in a predetermined area of the information board display table in the memory unit 125, and when it determines that a failure has occurred in the information display board 2 based on the status information, The failure occurrence time is specified from the time information supplied from the timer unit 123, and this is written in a predetermined area of the information board display table of the memory unit 125. It is assumed that the information display board failure determination unit 122 also performs control to display the status information sent from the information display board 2 on a display unit (not shown) provided in the console 11.

Here, the information board storage table stored in the memory unit 125 has a structure as shown in FIG. In the area b of this table, the status information (fault or normal) of the information display board 2 is written, and in the area d, the failure occurrence time of the information display board 2 is written. In addition, the final display data displayed on the information display board 2 by the operator console 11 via the control unit 121 is written in the area a, and in the area c, the information board redisplay effective separately set from the operator console 11 is enabled. The time is written.

The information display board failure determination unit 122 determines the information display board 2 based on the status information sent from the information display board 2.
The time elapsed from the time when it is determined that the failure is determined to the time when it is determined that the failure of the information display board 2 has been recovered and is normally restored is monitored by the time information of the timer unit 123, and the elapsed time is the information shown in FIG. It is determined whether or not it is within the board redisplay valid time. As a result, when it is determined that it is within the range, the information display board failure determination unit 122 drives the redisplay control request unit 124. As a result, the redisplay control requesting unit 124 causes the memory unit 1 to
The final display data is read from the area a of the information board display table 25 and given to the control unit 121. At this time, since there are usually a plurality of information display boards 2, the redisplay control request unit 124 accesses the information board display table corresponding to the information display board 2 which has recovered from the failure and gives the final display data to the control unit 121. To the information display board. The control unit 121 transmits the final display data given from the redisplay control requesting unit 124 to the transmission line 3
It is sent to the corresponding information display board 2 via the and the display data is displayed on the information display board 2. When the information display board failure determination unit 122 determines that the failure time of the information display board 2 is longer than the information board redisplay valid time, it is written in the area a of the information board display table shown in FIG. Erase the final display data. In such a case, the operator
The operation of operating display 1 to display the display data on the information display plate 2 is then performed.

FIG. 3 is a diagram showing the flow of the display control operation for the information display plate 2 described above. In (A), the display data is sent from the center 1 to the information display board 2 by the manual operation of the operator, and the information (caution traveling caution) is displayed.
In (B), there is shown a state in which the information display plate 2 has failed due to a momentary power failure and the information displayed on the information display plate 2 has disappeared. At this time, the information display board 2 sends status information indicating a failure to the center 1. In (C), the information display board failure determination unit 122 of the center 1 monitors the return of the information display board 2. In (D), when the information display board 2 is restored to normal and the failure time is within the information board redisplay valid time, the redisplay control request unit 124 and the control unit 121 of the center 1 are shown.
Performs control to send the display data displayed before the failure to the information display board 2 and redisplay it on the information display board 2.

FIG. 4 is a flow chart showing the display control of the central control unit 1 shown in FIG. In step 401, the information display board failure determination unit 122 determines whether or not the information display board 2 has changed from normal to failure based on the status information sent from the information display board 2, and if not, step 403. If there is a failure, proceed to step 402. In step 402, the information display board failure determination unit 122
Saves the failure time of the information display board 2 in the memory unit 125, and then returns to step 401. On the other hand, if the process proceeds to step 403, the information display board failure determination unit 122 determines that the information display board 2
Determines whether the normal state has returned from the failure state, and as a result, returns to step 401 if the normal state has not returned,
If it returns to normal, the process proceeds to step 404. Step 4
In 04, the information display board failure determination unit 122 obtains the time T during which the information display board 2 has failed from the time when the failure is recovered and the failure time stored in step 402, and proceeds to step 405. In step 405, the information display board failure determination unit 122 determines whether or not the failure time T is within the information board redisplay valid time. If not, the process proceeds to step 407 to erase the final display data in the memory unit 125. After that, the process returns to step 401. On the other hand, if T is within the information plate re-display valid time, the process proceeds to step 406 to activate the re-display control request unit 124 to display the final display data in the memory unit 125 via the control unit 121. Board 2
To display the final display data on the information display board 2 again, and then return to step 401.

According to this embodiment, when the information display board 2 fails and recovers within the information board redisplay valid time, the central control unit 12 makes the final display which the information display board 2 displayed before the failure. The data can be automatically retransmitted and displayed on the information display board 2. Therefore, when the information display plate 2 is broken for a short time due to a momentary power failure or the like, the operator of the center 1 does not notice this and the information on the information display plate 2 is prevented from disappearing. It is possible to improve the reliability of the system. The reason why the re-display on the information display plate 2 is automated only when the failure time of the information display plate 2 is within the information plate re-display valid time in the above embodiment is that the failure of the information display plate 2 is long. This is because in the case of the above, the display data displayed on the information display board 2 is often different from that before the failure.

[0014]

As described above, according to the information display board display system of the present invention, when the information display board fails and recovers for a short time, the information can be automatically re-displayed on the information display board. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an information display board display system of the present invention.

2 is a diagram showing an example of an information display table stored in a memory unit shown in FIG.

3 is a diagram showing a flow of a display control operation for the information display plate shown in FIG.

FIG. 4 is a flowchart showing display control of the central controller shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Center 2 ... Information display board 3 ... Transmission line 11 ... Operation console 12 ... Central control device 121 ... Control part 122 ... Information display board failure determination part 123 ... Timer part 124 ... Redisplay control request part 125 ... Memory part

Claims (1)

[Claims] 1. The central control unit displays the display data on the information display board by sending the display data to the information display board through a transmission path, while the information display board indicates whether the information display board is faulty or normal. In the information display board display system for controlling to send the status information to the central control unit through the transmission path, setting means for setting a predetermined time, storage means for saving the final display data displayed on the information display board, Judgment means for judging whether or not the time from the failure of the information display board to the normal recovery is within a predetermined time set in the setting means based on the state information sent from the information display board When the determination unit determines that the time from the failure of the information display plate to the normal restoration is within the predetermined time, the final display data is read from the storage unit. Then, the information display board display system is provided with a control means for sending this to the information display board via the transmission path.