Vehicle Equipment System Based on Beidou Satellite Timing Signal

Abstract

The embodiment of the invention provides a vehicle-mounted equipment system based on Beidou satellite time signals. The system comprises a Beidou NTP server, an LAIS, an LKJ, ATP equipment, a DMS and a CIR, wherein the Beidou NTP server is used for outputting corrected clock signals according to the time signals of a Beidou satellite, the LAIS is electrically connected with the Beidou NTP server through a first serial bus, the LKJ is electrically connected with the LAIS, the ATP equipment is electrically connected with the LKJ through a second serial bus, the DMS is electrically connected with the Beidou NTP server through a third serial bus, the CIR is electrically connected with the DMS through a fourth serial bus, and the LAIS, the LKJ, ATP equipment, the DMS and the CIR are used for carrying out respective operation according to the corrected time signals. According to the technical scheme, vehicle-mounted equipment in the vehicle-mounted equipment system can operate according to the higher-precision, safer and more reliable clock signals obtained by correcting the time signals of the Beidou satellite, which is beneficial for improving the traveling safety of a train.

Description

technical field [0001] The invention relates to the technical field of railway operation safety, in particular, the invention relates to a vehicle-mounted equipment system based on the Beidou satellite timing signal. Background technique [0002] Trains have become an important means of transportation for people to travel and transport goods. Railway lines are becoming more and more busy, and the intervals between different trains passing the same place (such as the same turnout) are getting shorter and shorter. In order to prevent trains from colliding, trains usually travel strictly according to the established schedule and routes under the control of the on-board equipment system. [0003] At present, the frame diagram of an existing vehicle equipment system structure is as follows figure 1 As shown, including: LKJ (Liecheyunxing jianKong Jilu zhuangzhi, train operation monitoring and recording device) 101, ATP (Automatic Train Protection, automatic train protection) equ...

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Problems solved by technology

[0008] However, the accuracy of the clock signal in LKJ101 and the RTC signal in the ATP device 102 is relatively low, and it usually takes a long time for the train to travel from the garage at the starting point of the line to the garage at the end point. The clock signal deviates from the clock signals of other trains or control centers, which may easily cause traffic accidents

[0009] In addition, the ownership, control and operation rights of GPS belong to the U.S. Department of Defense. Although it is developed to China for free, it does not promise to guarantee its use;

It can be seen that the security and reliability of the GPS timing signal are relatively low. Even though LKJ, DMS and CIR can use the GPS timing signal to correct their respective clock signals, there are still train clock failures caused by the lack of GPS timing. The hidden danger of signal disorder can cause driving accidents in extreme cases, and even cause the railway system to be paralyzed, seriously threatening the economy and safety of our country

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