Tunnel traffic information wireless publishing method based on frequency modulation data broadcasting

Abstract

According to the tunnel traffic information wireless publishing method based on frequency modulation data broadcasting, wireless publishing of tunnel traffic information is achieved, tunnel managementpersonnel publish related traffic information into a tunnel remotely and wirelessly in time, wired communication line constraints are eliminated, tunnel traffic information publishing reliability andeffectiveness are improved, the transformation work amount is small, and operation is easy and convenient. The method comprises the following steps: (1) serving as a standby mode for traffic information release; (2) judging whether the mobile display device is a mobile display device, if so, executing the step (6), otherwise, executing the step (3); (3) judging whether wired communication interruption is caused by an emergency reason or not, if so, executing the step (6), and otherwise, executing the step (4); (4) judging whether wired communication is interrupted due to maintenance, if so, executing the step (6), otherwise, executing the step (5); (5) as a standby link, going to the step (1); (6) the traffic information display device receiving the frequency modulation data broadcast information; and (7) sending the tunnel traffic information through a frequency modulation broadcast transmitter.

Description

technical field [0001] The invention belongs to the technical field of intelligent transportation, and in particular relates to a wireless publishing method of tunnel traffic information based on frequency modulation data broadcasting. Background technique [0002] FM data broadcasting is a wireless communication technology that uses the vacant part of the existing FM broadcasting spectrum to set up channels for data broadcasting. [0003] The application of FM data broadcasting technology in foreign countries was earlier. Since the 1950s, the United States has launched FM auxiliary communication services, Europe has widely used FM data broadcasting technology in many fields, and formed a unified technical specification, and Japan officially broadcasted it on Tokyo FM Radio Station in 1988. Data broadcasting suitable for fixed reception methods. [0004] In the 1990s, my country began to vigorously research and promote the application of FM data broadcasting, focusing on b...

AI Technical Summary

Problems solved by technology

At present, the information release in the tunnel is mainly based on the information board, signal marking and broadcasting. Among them, the communication route between the information board and signal marking and the upper level is usually optical fiber communication. There is a lack of economical and reasonable backup communication routing form, and the mobility is poor, especially when the main one is used. When the optical fiber routing needs to be repaired or the optical fiber routing is interrupted due to an emergency, although the 2G, 3G, 4G or 5G network of the mobile communication operator can be used to build a new communication route for wireless release of traffic information, but based on this type of wireless release They all rely on the communication network base stations in the nearby tunnels with relatively short distances, and the overall cost is relatively high, and these base stations still rely on wired communication lines to realize their communication with the upper-level network nodes

When an emergency occurs in the tunnel and the wired communication is interrupted, the communication capability is often lost

In addition, during the tunnel construction period, fixed information display equipment cannot provide timely and targeted information release for tunnel construction, which affects construction safety and construction efficiency

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