Urban rail transit communication system includes ( )

Urban rail transit communication system includes wireless communication system and official communication network.

Introduction of urban rail transit signaling system:

Urban rail transit signaling system usually consists of two major parts: automatic train operation control system (ATC) and vehicle section signaling control system, which is used for train interlocking, approach control, train spacing control, scheduling and commanding, information management, monitoring of equipment working conditions and maintenance management, thus constituting This constitutes an efficient integrated automation system.

The advantages of rail transportation:

The construction and operation of urban rail transportation can promote the development of industry, transportation, real estate and other related industries, stimulate employment, promote the appreciation of the land along the way, expand the space for urban development, and it has obvious external economy, i.e., the total social and economic benefits generated by the project are much larger than the book income generated by the project itself.

The operation of urban rail transit projects has limited profit space, but the economy is amplified. With the development of society, increase in population, expansion of road network and improvement of service level, urban rail transit will attract more passenger flow, ticket revenue has a certain growth in the long run, and its affiliated operating assets have great appreciation potential.

Rail system mode introduction:

1, speed code mode (step)

such as the Beijing Metro and Shanghai Metro Line 1 respectively, the introduction of the British Westinghouse and the United States of America GRS company's ATC system belongs to this type of ATC system, the system is the product of the 70s to 80s, mature technology, lower cost, but because of the occlusion of the partition of the ATC system, the system is a good choice. Low, but because the design of the length of the blocking partition is limited by the most unfavorable line conditions and the lowest train performance, is not conducive to improving the line transportation efficiency.

Fixed occlusion speed code mode ATC is based on ordinary audio track circuit, track circuit transmission information is small, corresponding to each occlusion partition can only transmit a message code, from the control mode can be divided into two kinds of entrance control and exit control, from the type of track circuit can be divided into two kinds of insulated and uninsulated track circuit.

2, the target distance code mode (curve type)

The target distance code mode is generally used in the audio digital track circuit or audio track circuit plus cable loop or audio track circuit plus transponder, with a larger amount of information transmission and strong anti-jamming ability. Through the audio digital track circuit sending device or transponder to the vehicle equipment to provide target speed, target distance, line status and other information.