With the development and demand of railway and highway transportation construction. In order to ensure the safe production of the construction and normal dispatching, the radio communication system plays a vital role.
Two-way radio has been applied to tunnel construction and post-scheduling because of its advantages of multiple calls, no networking, simple and convenient operation. Under normal circumstances, the handheld two-way radio has a limited transmission distance and the tunnel has a large obstacle to the signal. It is impossible to meet the communication requirements of any part of the tunnel by relying on the handheld two-way radio. Therefore, in the tunnel construction, a reliable tunnel needs to be introduced. Radio communication system.
The most important requirement of the radio system is to solve the signal blind zone caused by large buildings and unfavorable terrain. Through the system, the radio signal can be effectively covered in the relevant area, increase the communication transmission distance, overcome various adverse terrain effects, and realize the correlation. Work coordination and command scheduling within the region.
The tunnel radio communication system provides a smooth call between the departments in the tunnel, covering the tunnel management area and the equipment room. The radio communication system can establish flexible communication between the personnel in the tunnel for maintenance, rescue, patrol and other control room management personnel. It can transmit information, notices and commands to the staff in the tunnel through the dispatching base station of the control center. Incidents are promptly ordered and staffed. And communication can be established with the outside line through the dialing system.
The tunnel radio communication system can use analog or digital communication in the 150MHz or 400MHz band. Several groups of talk groups can be designed according to the staff in the tunnel, so that the group members can feedback important information at the first time and ensure the safety of the personnel when working alone.