System and method for receiving DAB emergency information through asynchronous LED screen

Abstract

The invention belongs to the technical field of the public security, and discloses a system and method for receiving DAB emergency information through an asynchronous LED screen. A USB switch chip isused for selecting whether the LED screen display content is from an external U disk or a virtual U disk produced by a DAB receiving module; under a normal condition, the DAB receiving module is run at a background, the content displayed by the LED screen is acquired from the external U disk; once the DAB receiving module receives emergency information, the USB switch chip is triggered to forcedlyselect that the LED display content is from the DAB receiving module. In order to be compatible with the existing driving board of the asynchronous LED screen, the DAB receiving module uses the virtual U disk technology, the received emergency information is converted in to a virtual USB magnetic disk, the magnetic disk is identified by the LED driving board so as to display the emergency information on the LED screen. Through the method disclosed by the invention, the DAB emergency information can be timely and accurately published to the existing asynchronous LED screen, and the original function of the LED screen cannot be affected.

Description

technical field [0001] The invention belongs to the technical field of public safety, and in particular relates to a system and a method for receiving DAB emergency information by an asynchronous LED screen. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] my country has a vast territory, complex geography and climate conditions, and is one of the countries in the world that suffers most from natural disasters. How to carry out effective early warning of disaster information to ensure the safety of people's lives and properties to the greatest extent is a major issue of science and technology and people's livelihood that modern society has always paid attention to. Today, most disasters can be predicted more accurately through scientific and technological means, and the main ways to disseminate such information are mobile communications, the Internet, television, radio, newspapers, and telephones. ...

AI Technical Summary

Problems solved by technology

[0008] (1) Using the Internet and mobile communications to issue real-time warning information to a large number of users is prone to information loss and network congestion;

[0009] (2) The existing DAB early warning terminal is mainly a dedicated terminal based on audio and text, which is mainly used for receiving early warning information in remote areas, and the audience is limited;

[0010] (3) Although the existing DAB early warning terminal can output text to the LED screen, this kind of LED screen is dedicated and can only be used to display DAB early warning information, and cannot display other information;

[0011] (4) The existing asynchronous LED screens that have been installed currently do not support the reception of DAB warning information, because there is a lack of DAB receivers and control software that match the LED driver board

[0013] The technical difficulty is that adding a DAB receiver to the existing asynchronous LED screen must not affect the existing hardware connection, so as to reduce the cost of system transformation; at the same time, it must not affect the normal commercial use of the LED screen; the early warning information should only be used in case of natural disasters or Overlay display on the LED screen in the event of an emergency

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