Wireless LED meteorological early warning information release system
A preface.
1. The project background
According to the China meteorological administration published the meteorological disaster warning signal distribution and transmission methods, schools, airports, and tourist attractions and densely populated urban area and public management unit, the use of the electronic display unit must be set or the distribution of meteorological early warning signal. The meteorological disaster warning signal distribution and transmission method "requirement, meteorological offices and stations subordinate to the competent meteorological departments at various levels shall make full use of radio, television, electronic display device, such as early warning signals to the community in a timely manner. In minority nationality areas the warning signal in addition to the use of Chinese language and text, also should use the local minority language. In addition, it also requires the local people's governments at various levels to strengthen early warning signal of infrastructure construction, establish a clear and effective early warning information release and communication channels, to expand the coverage of early warning information.
Traditional main meteorological information through television, newspapers, radio, SMS, Internet and other ways to release, the release way need to have a media transfer process, there will be some time delay, the public also want to receive information through these media channels, the arrival rate will have a certain degree of loss, which affects the effectiveness of the meteorological information release. Therefore, the traditional way of meteorological early warning issued cannot cope with the sudden meteorological disasters in a timely manner.
Wireless meteorological information publishing system can be released to the public in the first time a direct meteorological early warning information, do not need to transit through the media, to effectively shorten delivery time delay, improve the arrival rate, thus improve the effectiveness of the meteorological early warning information release.
2. The system advantages
Our company is the industry's first launch of embedded GPRS module the full range of LED control system and the information release system, manufacturers.
We are committed to provide customers with the innovation to satisfy the demand of LED information release system and control system related products, services and solutions, for clients to create the value of sustained growth. Company technical force is abundant, the LED electronic display technology, network technology, computer software, embedded software, multimedia technology, digital terminal products, network communication, automatic control and other fields with a strong research and development strength; Our r&d team has many years of experience, the industry has been involved in the first domestic information release system based on the customer business process and front-end control system development and project implementation.
Day letter each LED research and development of wireless meteorological early warning information release system contains a complete database management platform, terminal services communication center, a web-based operating software, product development is completed at the end of 2010, and through the internal test, in a number of provincial meteorological users open network operation.
System not only meet the commonly used the weather forecast, the actual weather information and major meteorological disaster early warning information release, at the same time, using the system to provide special information slots mechanism, can also satisfy the real-time release of relevant government administrative functions of the important government affairs and public emergency early warning information, scope of fast release for important information to all parts of the city, the streets, to achieve the purpose of notification and propaganda.
2. System design
1. The system structure
Day letter each LED wireless information release system USES the advanced B/S and C/S structure mode, mainly contains the operation page, IE center service software, data center, terminal equipment, four parts. Function mainly from the program information, send, center service program automatically generated information playlists, and through the service center, sent to the corresponding packet terminal equipment by the machine control system in effective period in the center of the LED display according to the information generated playlist for broadcast.
System can realize automatic invocation of meteorological information from meteorological information database and real-time release to the corresponding packet terminal equipment, by the machine control system within the effective period of time in LED display circularly.
2. The function characteristics and advantages
The network architecture
System development USES the advanced B/S mode of network architecture, service center all data storage and server to facilitate daily system maintenance, and provide convenient and simple parameters configuration function according to different network environment to realize fast installation deployment server system. WEB interface can be anywhere, anytime in any computer can be connected to the Internet connection center, data management, and other operations, even if the center address changes, the system configuration function can easily connect the new center address.
The system user permissions
System adopts the way of user permissions corresponding screen group, fully satisfy different users to send information to the corresponding user screen group's requirements, each other, their relative independence, assigned by the system administrator agrees to management.
The system administrator has the highest authority by default, general based data management center system administrator. All the ministries users assigned by the headquarters unified center administrator login ID, the administrator can through the system to provide the way to select screen group easily assign each user corresponding all LED screen, and manage to send each own screen.
Real-time online monitoring equipment
All terminal equipment maintain real-time online, through service program trunking communication link, the user through the WEB interface can easily implement real-time monitoring all screen group of wireless terminal equipment is normal work online, real-time and refresh the network registration time, the automatic calculation offline time, provide effective basis for system managers evaluate equipment working status.
Wireless data transmission
Using UDP subcontract parts of wireless data transmission system packet transport, its advantage lies in the data transmission speed, high efficiency and low packet loss rate. Specific process roughly divided into: first of all, by the ten packets by center each group package, every package labels, a set of package will lower their phones to record has lost package labels, center received lower machine return label will only resend again has lost package. So will the data sent in sequence, and the safety and efficiency of data transmission.
The third party forward data in real time
Center service software can automatically grab the third party software database files, will need to send information in real time automatically according to the predefined formats issued to need to play in the LED display, and carried out in accordance with the predefined time play.
End-to-end solutions
With each day letter LDE control system is used, provide end-to-end solution as a whole.
3. The system components
3.1 service center
Service center program is one of the core components of the system platform. Achieve its function main response to the client's message is sent, maintenance and receiving terminal equipment list information online, a WEB interface with the terminal communication links of relay.
Operation mechanism
When the WEB interface to send warning information stored in the data center, and service programs will be received from the WEB interface of a request, system connected to the data center, the client sends data. And according to the maintenance of online terminal list is sent to the corresponding LED screen. Some terminal equipment of the current screen if the group is not online, such as terminal online before the program will automatically send data to the screen. If the warning information broadcast over time, the system will automatically cancel the send queue, even if the terminal online will not download expired early warning and avoid misleading the public.
3.2 business system
Business system daily operation of the application as a user interface, must fully consider the ease of use and the robustness of the program of the system and the ease of deployment, so we adopt the advanced B/S and C/S architecture; Meet the needs of different scenarios.
System login
All the user needs through legal user name and password authentication to log in into the system, the system will according to different user permissions and roles to disable some functions, such as operational inconvenience can contact the system administrator, by modifying the permissions to meet the corresponding operation function.
Program information
Program information management system is the basic unit, including program information query, released the new program, content of examination and approval, and broadcast, hiatus and open, quick release program, real-time programming, the default program Settings.
Program information query
Real-time query condition of program content, and under the current user permissions (with audit, with seeding, on and off), real-time preview, view, and can be off the air, open, delete, and so on. The query results can be exported Excel file.
Release the new program
Customizable program name and number, according to the selected group and time slot and can be words, pictures on the screen partition defined, GIF animation, flash animation, such as AVI video content.
Content of examination and approval
Operators have the permissions to release program review, review can be real-time preview the content and the understanding was audit program properties; All ordinary program must be approved before can be released.
Program properties
Ø program code, name: stored query basis;
Ø warning type: blue, yellow, orange and red;
Broadcast Ø classification: weather, announcement, public welfare, business;
Ø broadcast status: broadcast, off the air;
Ø broadcast cycle: the commencement date and time;
Ø broadcast station, grouping: all the unicast and multicast;
Ø broadcast time, number of times: (automatic computing);
Ø programming sender: province, city bureau officials.
The playlist
Terminal programs broadcast content under the control of the broadcast list, the list according to the properties of the aging, cycle, grouping generated automatically, without artificial modification.
Program information management
Program information management module is one of the main functions of the entire WEB interface, main implementation from the early warning information, government affairs sudden emergencies, the common program edit, preview, and send the whole process. Including screen partition method, window screen shows scroll forms such as attribute value set.
Voice broadcast
All client send text messages can be implemented under a machine voice broadcast function.
Broadcast time and number of custom Settings.
3.3 TXW 500 g asynchronous control system (full color gray control system) function and technical index
TXW is 500 g day letter communication technology co., LTD. Of shenzhen's new cost-effective "full-color gray-scale graphic control system based on GPRS. New video support, unique in the industry.
TXW 500 g besides has the advantages of high gray, multi-window, greater storage capacity, lower cost. Has a very high cost performance and strong market competitiveness. Is the first choice of gray-scale graphic control system on the market, LED LED by screen into the era of high performance, fine display.
TXW 500 g industrial standards, and to optimize the design of the electromagnetic compatibility, it has strong reliability; Low voltage start, + 5 v voltage reverse and overload protection communications chips use TVS against lightning surge protection design; Hardware watchdog, solve the unstable voltage or electromagnetic interference and so on reasons cause a system crash issue;
TXW 500 g embedded GPRS module and the WIPS wireless LED information release system of form a complete set, can let users more convenient, fast, efficient, safe, flexible for the LED information release and management
Function characteristics and advantages
Ø all content and compression transmission, card over compression;
Ø support video AVI files, support Flash (SWF), animation (GIF), pictures, text, clock, temperature, and other program types;
Ø supports more than 60 action effects, snow, Mosaic, fan-shaped expansion, and so on;
Ø independent setting around the window frame;
Ø universal language program, the text can be more transparent overlay display window;
Ø program way more, can store 640 largest programs on the screen;
Ø menu shows the layered management, simple and easy to edit management;
Ø support program period of play on time, accurate to the week, when,;
Ø window way, each program supports up to 10 play window arbitrary segmentation, the contents of the window to support different formats broadcast at the same time;
Bells and whistles
Ø board with real time clock management and setting up the RTC. Analog clock, digital clock, transparent display;
Ø support temperature environment data such as program;
Ø support plugins photosensitive (realize 32 automatically adjust the brightness level);
Ø onboard optional word stock 128 MB character space;
Ø English word stock all specifications, customers can edit;
Ø optional load 16 * 16, 24 x 24, 32 * 32, 40 x 40, 48 x 48, 56 x 56 lattice Asian language character (Chinese simplified, Chinese traditional, Japanese, Korean and other optional);
Program management
System to support multiple programs on time period of play, accurate to weeks, hours, minutes, at the same time provide file list form, future program broadcast time to achieve the user completely custom in advance. System default maximum storage capacity of 256 m, external support CF card way of increasing the storage space (meteorological warning system completely enough to use the default storage space).
More Windows partition method
Each program supports up to 10 play window arbitrary segmentation, the contents of the window to support different formats at the same time. Usually meteorological early warning information release only icon (upper left partition), early warning information title (upper division), early warning definition/response information such as the content description (partition) under the three basic partition is can. RGB color no 2048 x 256 pixel grayscale display, large area monochrome 2048 x 1024 x 1024 points, 1024 points, double color cascade synchronous display can be more CARDS.
Commonly used control instruction
Ø instant switch panel
Ø time switch panel
Ø clock synchronization control card
The clock Ø query control card
Ø set LED brightness
The LED brightness Ø query
Ø format control card
Ø information query in the show
Warning icon defined
Control system of the factory preset China meteorological administration regulations of various meteorological disaster warning icon, and coding, deposited center send a corresponding warning coding warning icon real-time display can be realized. When need new warning definition, content and the corresponding early warning users defined in the client icon, data center only to download a new warning icon, service center will automatically download the next time you send the early warning system corresponding number, custom to maximize effectively save the network data flow, save operating costs.
Warning the following sample pictures: (generally recommended to use 24 * 24 or 32 * 32 dot matrix display warning icon to go)
Quality assurance
On quality control, we will unswervingly following the path of quality development, the concept of highly responsible to carry out in the product manufacturing and after-sale service of every link. The aging of the raw materials procurement, manufacturing process and finished product continuously strengthen control of each link, continuously improvement.
The main technical indicators
Ø scanning mode: compatible with 16, 1/8, 1/4, 1/2 sweep and static, 32 levels of brightness adjustment;
Ø interface method: embedded GPRS communication module, RS232 and RS485, 10/100 m Ethernet interface is optional,
Ø maximum baud rate 115200;
Ø working voltage: 4.6 V to 4.6 V, with reverse connection, over voltage, short circuit protection;
Current Ø job: 600 ma;
Ø peak current: 800 ma
Ø working frequency: 60 MHZ;
Ø working temperature: - 40 ℃ ~ 70 ℃;
Ø work humidity: 95% (no condensation).