Vehicle mounted communication device

Abstract

The invention is a vehicle communication device used in early warning and forecasting for train approaching, set on the engine, including: running data collecting box, connected with several sensors set on train and receiving running data; data converting platform, connected with the collecting box and including a microprocessor, controlling the vehicle communication device to work, and a memory unit used to store the running data; primary coding unit, connected with the converting platform and used to make digital coding on the running data; primary receive-transmit unit, connected with the primary coding unit and used to transmit running data and receive alarm data; a high-frequency power synthesizer, connected with the receive-transmit unit and used to control the radio signal conversion between the primary / secondary receive-transmit unit and the antenna; the antenna set on top of the engine, connected with the high-frequency power synthesizer and used to transmit and receive radio signals; alarm, connected with the receive-transmit unit and used to decode the alarm information and make voice alarm.

Description

technical field [0001] The invention relates to a vehicle-mounted communication device, in particular to a vehicle-mounted communication device used for early warning and forecasting of train approaching. Background technique [0002] In the railway system, trains must run normally, and railway facilities need to be repaired and maintained by staff. This creates contradictions and conflicts between railway facility maintenance and train operation, and even vicious safety accidents such as vehicle crashes and casualties occur. In the past, the timing of on-site operations was mainly based on the train diagram. When an emergency occurs, the diagram must be changed temporarily. If there are people working on the railway ahead, their lives will be threatened. On the other hand, during the operation of the train, when the staff finds a major safety hazard on the road but fails to inform the train driver who is exercising, the consequences will be disastrous. [0003] In order to...

AI Technical Summary

Problems solved by technology

[0004] (1) Using medium and short wave frequency bands for transmission and reception, the signal is easily interfered and the signal is easy to interfere with the transmission and reception of other equipment, and the full time domain transmission is performed, the frequency occupation time is long, and the frequency utilization rate is low

Besides, using analog signals for transmission, the device has poor anti-interference and poor error correction ability

[0005] (2) The train approaching alarm device usually uses the sound source as the signal source or the light sensor or the track sensor to collect the signal at a fixed point, and then emit an alarm. The scope of use and the environment are greatly limited, which is not conducive to widespread use

Moreover, the alarms all use audible and visual alarms, without vehicle driving data, it is difficult for receiving terminals such as crossings and railway construction sites to learn the train driving information as soon as possible, so safety precautions should be taken in advance

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