A train passenger emergency alarm based on linux platform

Abstract

The invention relates to a train passenger emergency alarm based on a Linux platform. The train passenger emergency alarm comprises an alarm body, and an embedded processor, an audio processor and a network communication module which are arranged in the alarm body. An emergency call button is arranged on the alarm body. A passenger emergency alarm control program based on Linux is run in the embedded processor. The operation for executing the passenger emergency alarm control program includes the steps of monitoring the working state of the alarm in real time, conducting automatic repairing when abnormity happens, uploading a self-recovery alarm, monitoring the state of the network communication module in real time, switching the digital working mode into the analog mode when a network fails, monitoring whether a triggering signal of the emergency call button exists or not in real time, and in response to the triggering signal, calling the audio processor for audio collecting and echoeliminating and playing. Compared with the prior art, the train passenger emergency alarm has the advantages of being high in reliability and stability and the like.

Description

technical field [0001] The invention relates to the technical field of train broadcasting, in particular to an emergency alarm for train passengers based on a Linux platform. Background technique [0002] With the development of rail transit, more and more systems adopt digital systems, and the train broadcasting system is no exception. The passenger emergency alarm is the core component of the train broadcasting system, and it is a necessary tool for the driver to communicate with the passengers, and the passengers to communicate with the control center. As a tool used by passengers in an emergency, the passenger alarm has the safety qualification of SIL2 (Safety Integrity Level 2). [0003] In existing project execution, both analog and digital have their advantages. In the traditional analog system, the anti-interference ability is poor, the scalability is poor, the full-duplex intercom cannot be realized, and the intercom real-time performance is high; in the modern di...

AI Technical Summary

Problems solved by technology

In the traditional analog system, the anti-interference ability is poor, the scalability is poor, the full-duplex intercom cannot be realized, and the intercom real-time performance is high; in the modern digital system, the full-duplex intercom echo cannot be effectively realized, and the Control the timeliness of intercom, unable to effectively record intercom, but strong anti-interference ability, strong flexibility and other functions

[0004] As the customer's requirements become more and more abundant, the existing system cannot effectively perform system self-diagnosis, system status query, system fault diagnosis, etc., and the sound quality of calls cannot be effectively controlled. Improve

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