KR100470139B1 - Monitoring system for display of sign board in VMS and communication method for it - Google Patents

Abstract

The present invention relates to a sign monitoring apparatus for monitoring whether a content displayed on a sign in a variable information sign (VMS) system is displayed in the same manner as a content sent from a VMS server. In the apparatus of the present invention, the variable information sign server and the variable information sign plate are connected by one dedicated line, and the variable information sign server transmits the display data in a predetermined format to the variable information sign plate, requests the sign surveillance image data, and receives the received data. The extracted video data and display it on the screen. When the variable information sign (VMS) receives an expression statement command from a sign, a camera, an image board, a sign control board, and a variable information sign (VMS) server, the variable information sign (VMS) transmits display data to the sign control board according to a set method and then responds. Sending to the variable information sign server, and receives an image information request command from the variable information sign server includes an operating computer that receives the image data captured by the camera from the image board and transmits to the variable information sign server. Therefore, according to the present invention, it is possible to reduce the communication cost and reduce the use address since the display data can be transmitted and the monitoring data can be transmitted using only one dedicated line between the VMS server of the traffic information center and the VMS of each site. The benefit is that the operating program is simplified.

Description

Monitoring system for variable information sign and communication method for it {Monitoring system for display of sign board in VMS and communication method for it}

The present invention is installed on a road sign in the variable message sign (VMS: Variable Message Sign) system for displaying the signs displayed in the sign monitoring system for monitoring whether the same as the contents sent from the VMS server More particularly, the present invention relates to a screen monitoring apparatus for a variable information sign that can transmit display data from a VMS server to a sign using one transmission path and receive surveillance image data captured by a surveillance camera, and a communication method therefor. It is about.

VMS, currently installed on highways, is used as an important information transmission medium to inform highway users of traffic information, construction information, and traffic-related promotional text in a wired manner using optical communication networks. That is, the variable information sign system receives the traffic information consisting of a bitmap from the traffic information center, and provides the traffic information such as road traffic situation and construction information, accident situation, detour road to the driver in real time.

The variable information sign system controls the signs installed on each road in the traffic information center to display various traffic information in letters or figures. Check whether the signs installed on the site are displayed as instructed by the traffic information center. In order to monitor the sign screen monitor is required. Sign screen monitoring methods include a dot monitoring method using a semiconductor and a monitoring method using a camera. Since the method of measurement is uncertain, it tends to double as a surveillance method using a camera.

1 is a block diagram showing the configuration of a conventional sign screen monitoring apparatus in a variable message sign (VMS) system.

Referring to FIG. 1, the traffic information center 10 includes a sign operating server 12a for operating a sign and a video operating server 12b for monitoring a sign screen, and the sign 20 includes a sign ( 28 and a sign control system (a) for controlling the sign 28, and a camera control system (b) for controlling the camera 29 and the camera 29, and the like, the control systems of the field (a) and b) and the operation servers 12a and 12b of the traffic information center communicate with each other via modems 12a, 12b, 21a and 21b.

Sign control system (a) has a sign control board 24 is installed on the sign operating computer 22, the sign operating program 23 is mounted on the display data transmitted from the server 12a through the modem 21a The sign 28 is controlled to display traffic information accordingly. The sign 28 is preferably implemented by an electric signboard or the like to be installed on the road to display traffic information to the driver.

The video control system (b) has a video board (27) installed in the video operating computer (25), and the video program (26) is mounted to process the sign screen monitoring data captured by the camera (29) to process the modem (21b). ) To the traffic information center (10). At this time, the camera 29 is installed to face the sign 28 by the camera housing 29c.

In this manner, conventionally, traffic signs are indicated on the signs 28 and displayed on the signs. Communication line cost and communication line are separated by two dedicated lines (modem 14a to modem 21a section) and dedicated lines (modem 14b to modem 21b section) to monitor the contents of the signs with the camera. There is a problem in that a communication cost increases because a lot of modems. In addition, when two separate dedicated lines are used, a plurality of addresses are used together with an increase in communication charges, which also complicates an operation program.

Accordingly, an object of the present invention is to provide a sign screen monitoring apparatus and a communication method therefor capable of transmitting display data through one dedicated line and receiving image data for sign screen monitoring.

In order to achieve the above object, the apparatus of the present invention, the variable information sign system (VMS) distributed on the road can be controlled via a variable information sign (VMS) server of the traffic information center system The variable information sign server and the variable information sign plate are connected by a single dedicated line, and the variable information sign server transmits the presentation data in a predetermined format to the variable information sign plate, and requests and receives a sign monitoring image data. Extracts the displayed image data and displays it on the screen, and the variable information sign board (VMS) includes a sign for displaying traffic information according to the display data, and the sign. A camera for monitoring the motion of the plate; An image board for controlling the camera and processing image data received from the camera; A sign control board controlling the sign to display traffic information according to the presentation data received from the variable information sign board (VMS) server; And upon receiving the display statement command from the variable information sign board (VMS) server, transmit the display data to the sign control board according to a set method, and then send a response to the variable information sign server, and request an image information request from the variable information sign server. And receiving an image data captured by the camera from the image board and transmitting the image data to the variable information sign server.

In addition, in order to achieve the above object, the method of the present invention, the sign information monitoring method of the variable information sign system to be able to control the variable information signs are distributed on the road through the variable information sign server of the traffic information center. The method according to claim 1, wherein the variable information sign server transmits the presentation data to the variable information sign plate in a predetermined format; Displaying, by the variable information sign, and displaying traffic information on a sign according to the received expression data; Requesting, by the variable information sign server, monitoring screen data through an image information request command; Receiving the video information request command, the variable information sign plate forming the video surveillance data collected from the camera in response to a predetermined format and transmitting the video surveillance data to the variable information sign server; And displaying, on the screen, the received monitoring data by the variable information sign server to transmit the display data and the monitoring data through one dedicated line.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing the configuration of a sign screen monitoring system according to the present invention.

Referring to Figure 2, the sign screen monitoring system according to the present invention is connected to the traffic information center 100 and the field system 200 via a modem (120,216) connected via a dedicated line, the traffic information center 100 The VMS server 110 for operating the system is provided. On-site system 200 distributed on the highway is operating computer 211, operating program 212, sign control board 213, image board 214, RS-232C port 215, modem 216 It consists of a VMS client 210, a sign 220 and a camera 230, the camera 230 is supported by the camera housing 232 is to monitor the sign 220.

The on-site operating computer 211 is equipped with an operating program 212, and controls to display on the sign 220, the display character data transmitted from the traffic information center 100 through the modem 216, the sign The display character image information transmitted from the camera 230 photographing the display screen 220 is transmitted to the traffic information center 100 in real time. The operating computer 211 is a computer system having an Intel CPU and 64 MB of RAM, which includes a video input / output device, a storage device, a LAN card, and the like, and is equipped with an operating system compatible with Unix.

The camera 230 adopts a 1/3 "CCD to realize a clear image of 480 TV lines or more. It has a low sensitivity of 0.5 LUX and can shoot in low light, and C & CS mount can be used to select various camera lenses, and it has an automatic sensitivity adjustment function and backlight compensation function.

The camera housing 232 is to protect the camera 230 and the lens from the external environment such as impact, and is beautiful and solid in appearance, and is treated with aluminum powder powder coating to prevent corrosion and to be used for a long time in any surrounding environment. It is an all-weather housing designed. In particular, the structure of the camera and the lens can be easily attached and detached, and the camera and the lens can be protected from changes in the external environment and impact.

The image board 214 is a board for converting the video signal input from the camera 230 into a digital code, the sign control board 213 is the traffic information according to the display data transmitted from the VMS server 110 of the traffic information center. Boards that control signs 220 to display, all of which are mounted on operating computer 211.

The communication protocol for transmitting the presentation data and the monitoring data in one dedicated line in the sign monitoring system is as follows.

3 is an example of a data format transmitted from a traffic information center to a signage side according to the present invention, and FIG. 4 is an example of a data format transmitted from a signage to a traffic information center according to the present invention.

3 and 4, the data formats transmitted between the traffic information center 100 and the field system 200 are DLE, STX, ADDR, OP CODE, FN (H), FN (L), and D (H). And a header portion consisting of D (L), a data portion, and a trailer consisting of DLE, ETX, CRC (H) and CRC (L). Here, ADDR represents an address to which data is to be transmitted. The OP CODE indicates a data transmission direction. When the value is "0xA2", the OP CODE indicates data transmitted from the traffic information center 100 to the field system 200. When the value is "0xA5", the OP CODE is displayed from the traffic information center. Represents data that is passed to 100.

The data is divided into one byte of command code, one byte of command division, and variable length of guitar. The other part is attached data which is not added or added according to the instruction. Table 1 below shows examples of command codes and command categories used in the embodiments of the present invention.

Command code Command Code Description Order Description of Command 0xC0 Presentation Information Control 0xC0 Expression phrase (character) 0xC1 Expression Statement (Shape) 0xC2 List History Information 0xC3 Message display method setting 0xC4 Deleted contents 0xC5 Manual Message Display 0xC6 Message display time interval setting 0xC7 Self-expression 0xC8 Graphical VMS Character Expression 0xC1 Module detail check Module Detail Check Request 0xC2 Brightness control 0xC0 Luminance mode selection 0xC1 Luminance setting 0xC2 Manual luminance setting table download 0xC3 Signboard control 0xC0 Sign Board Power Control 0xC1 Sign board temperature request 0xC4 Controller initialization 0xC5 Status Information Request 0xC6 Video Information 0xC0 Video Information Request 0xC1 Camera control

Referring to Table 1, the command codes include display information control, module detail check, luminance control, sign board control, controller initialization, status information request, and image information. Commands are subdivided into expression phrases (characters), expression phrases (figures), expression history information, message expression method setting, expression content deletion, manual message expression, message expression time interval setting, self-expression phrase, and graphic VMS character expression. The luminance control command is subdivided into luminance mode selection, luminance setting, and manual luminance setting table download command, and the signboard control command is subdivided into sign board power control and sign board temperature request, and image information command is image information request and camera control. Subdivided into

In particular, the present invention implements a camera control command for controlling the camera and a meditation information request command for requesting image data captured by the camera, so that data can be transmitted through one dedicated line without using a separate dedicated line as in the prior art. . That is, the video information request command for the VMS server 110 to request the sign surveillance video data to the VMS client 210 has a command code of "0xC6" and a command segment of "0xC0" as shown in FIG. There is no. In response to the video information request command, the video information request response for transmitting the monitoring data to the VMS server 110 by the VMS client 210 is as shown in FIG. 4 with a command code of "0xC6" and a command segment of "0xC0." And an image size (horizontal pixel), an image size (vertical pixel), and image data.

Next, an example of monitoring a sign according to such a communication protocol will be described with reference to the procedure of FIG. 5.

When the first power-on VMS server 110 of the traffic information center initializes the controller through the controller initialization command to the VMS 210 of the site. At this time, the controller to be initialized is designated by the address ADDR of the data format shown in FIG. The command has a command code of 1 byte of data " 0xC4 ", and the data format of the controller response thereto is composed of 1 byte of command code followed by 7 bytes of command reception date and time of 1 byte of processing. The VMS server 110 waits the time required for controller initialization after the controller initialization command (about 30 seconds), and the VMS 210 transmits a response signal after the controller initialization to inform the VMS server 110 that the communication can be started. .

After the controller initialization, the VMS server 110 commands the power of the sign through the sign power control command. Accordingly, the VMS 210 sends the sign power control response to the VMS server 110 after turning on the power of the sign. The power control command consists of one byte of command code "0xC3" and one byte of command category "0xC0", one byte of setting status, six bytes of setting time, one byte of setting status, and one byte of setting time. Is done. If the setting status byte is "0", the power-on command is indicated. If "1", the power-off command is indicated. In response to such a power supply control command, the response data consists of a command code of 1 byte, a command of 1 byte, a date of occurrence of 7 bytes, and a processing state of 1 byte. If the processing state is "0", it is normal. "Indicates abnormality.

After the sign power is turned on, the VMS server 110 transmits a brightness mode selection command to set the brightness of the sign, and accordingly, the VMS 210 selects the brightness mode and responds. Subsequently, the VMS server 110 transmits a brightness setting command, and the VMS 210 sets a brightness according to the brightness setting command and then transmits a brightness setting response. In addition to the luminance, there is a manual luminance setting table download command. The luminance mode selection command consists of one byte of command code "0xC2", one byte of command code "0xC0", and one byte of luminance. All. Here, if the brightness is "1", the sensor formula is shown, if "2", the table formula is shown, and if it is "3", the manual formula is shown. The luminance mode selection response is made up of one byte of the command code, one byte of the command division, the date of occurrence, and the processing state. In the luminance setting command, the data portion is composed of one-byte command code "0xC2" and one-byte command segment "0xC1", one-byte luminance, four-byte start time, and four-byte end time. The luminance of one byte represents the luminance of VMS from 0 to 255 as binary data. The response to the luminance setting command is made up of a command code of 1 byte, a command category of 1 byte, a generation date of 7 bytes, and a processing state of 1 byte.

After the brightness setting is completed, the VMS server 110 transmits a display method setting command, and the VMS 210 responds after setting the display method according to the delivered display method setting command. The VMS server 110 transmits a message presentation time interval setting command, and the VMS 210 sets and responds to a message presentation time interval according to the message presentation time interval setting command. The message display method setting command is made up of one byte of the command code "0xC0", one byte of the command section "0xC3", and one byte of the display method code. The display method varies depending on the code value such as shift, scroll, wipe, curtain, and the like. Here, the shift is displayed by pushing the next screen to the left or right by overlapping the next screen on the existing screen, the scroll is displayed by pushing the existing screen and the next screen in the corresponding direction, and the wipe is displayed in the corresponding direction while deleting the existing screen. . The expression response setting response consists of a command code of 1 byte, a command of 1 byte, a date of occurrence of 7 bytes, and a processing state of 1 byte. Display time interval setting command It consists of one byte command code "0xC0", one byte command section "0xC6", one byte reference message size, one byte display time 1, and one byte display time 2. The expression time interval setting response is composed of a command code of 1 byte and a command of 1 byte, a generation date of 7 bytes, and a processing state of 1 byte.

As such, when all the settings for the expression method and the time interval are completed, the VMS server 110 actually transmits the expression data to be displayed on the sign 220 to the VMS 210 through the expression statement command, and the VMS 210. The display the traffic information on the sign 220 according to the data contained in the expression phrase command, and sends the expression phrase response to the VMS server (110). Expressive phrase commands are divided into character cover and figure cover, and in case of character cover, message code, total number of information, expression priority, message, etc. are transmitted along with command code and command classification, and in case of figure cover, command code and The section number and section data are transmitted along with the command classification.

On the other hand, in order to check whether the information displayed in the signs of each site is properly displayed in the traffic information center VMS server 110 controls the camera and requests the image information, accordingly VMS 210 the camera 230 After controlling, send camera control response and video information request response. The video information request response contains the data of the sign screen captured by the camera. The camera control command consists of one byte of command code, one byte of command, and 10 bytes of camera control, and the camera control response consists of one byte of command code and one byte of command. The video information request command consists of a command code of 1 byte and a command byte of 1 byte, and the video information request response is a command code of 1 byte. It consists of an instruction section of 1 byte, an image size of 2 bytes (horizontal pixels), an image size of 2 bytes (vertical pixels), and image data of a variable size.

As such, according to the present invention, if the VMS server 110 includes the sign screen monitoring data in the communication protocol of the display data and requests the data through a video information request command of a predetermined format after controlling the camera 230, the VMS 210 The sign screen image data obtained from the camera 230 transmits to the VMS server 110 in accordance with the video information request response format. Accordingly, the traffic information center extracts the received image data and can see the actual image displayed by the sign without going to the site.

The display content of the sign can be deleted by the VMS server 110 through the command to delete the display content, VMS 210 transmits a response after the action according to the deletion request. In addition to such a command, the VMS server 110 can monitor the module operation status of the VMS system through the module detailed check command, and can know the temperature of the signboard through the signboard temperature request command, and through the status information request command. You can see the operating status of the VMS.

As described above, according to the present invention, by using only one dedicated line between the VMS server of the traffic information center and the VMS of each site, the display data can be transmitted and the monitoring data can be transmitted, thereby reducing the communication cost. The advantage of reducing the address used is to simplify the operating program.

1 is a block diagram showing the configuration of a conventional sign monitoring system in a variable information sign system;

2 is a block diagram showing the configuration of a sign monitoring system according to the present invention;

3 is an example of a data format transmitted from a VMS server to a sign side according to the present invention;

4 is an example of a data format transmitted from a signage to a VMS server according to the present invention;

5 is a flow chart illustrating a communication procedure in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

100: Traffic Information Center 110: VMS Server

120,216: modem 200: field system

210: VMS Client 211: Operating Computer

212: operating program 213: sign control board

214: video board 215: RS-232C port

220: Sign 230: Camera

Claims (7)

In a variable information sign system that can control a variable information sign (VMS) distributed on the road through a variable information sign (VMS) server of the traffic information center, The variable information sign server and the variable information sign plate are connected by one dedicated line, The variable information sign server transmits the display data in a predetermined format to the variable information sign plate, requests the sign monitoring image data, extracts the received image data, and displays the received image data on the screen. The variable information sign plate (VMS) Signs displaying traffic information according to the presentation data, A camera for monitoring the operation of the sign; An image board for controlling the camera and processing image data received from the camera; A sign control board controlling the sign to display traffic information according to the presentation data received from the variable information sign board (VMS) server; And Receiving an expression statement command from the variable information sign (VMS) server transmits the expression data to the sign control board according to the set method and sends a response to the variable information sign server, and the image information request command from the variable information sign server It is configured to include an operating computer that receives the image data captured by the camera from the image board and transmits the image data to the variable information sign server. Screen monitoring apparatus for a variable information sign server, characterized in that for transmitting the data including a command code and a command classification according to the data format consisting of a header, data, and trailer between the variable information sign server and the variable information sign plate. . delete The data format of the video information request command is: A screen monitoring apparatus for a variable information sign board, wherein the command code is "0xC6" and the command classification is "0xC0". The data format of the video information request response according to claim 1, An instruction code is " 0xC6 ", a command segment is " 0xC0 ", and the screen monitoring device of a variable information sign is characterized by consisting of image size (horizontal pixels), image size (vertical pixels), and image data. The method of claim 1, wherein when the VMS server transmits a camera control command of a predetermined format, the operating computer receives the message and controls the camera through the image board, and responds to the VMS server. Screen monitoring of variable information signs Device. In the sign monitoring method of the variable information sign system that is able to control the variable information signs distributed on the road through the variable information sign server of the traffic information center, Transmitting, by the variable information sign server, presentation data to a variable information sign plate in a predetermined format; Displaying, by the variable information sign, and displaying traffic information on a sign according to the received expression data; Requesting, by the variable information sign server, monitoring screen data through an image information request command; Receiving the video information request command, the variable information sign plate forming the video surveillance data collected from the camera in response to a predetermined format and transmitting the video surveillance data to the variable information sign server; And And displaying, by the variable information sign server, the received monitoring data on a screen. A communication method for monitoring a sign screen of a variable information sign, characterized in that the display data and the monitoring data can be transmitted in one dedicated line. 7. The method of claim 6, wherein the communication method controls a camera for imaging a sign. The communication method for the sign screen monitoring of the variable information sign further comprising the step.