Shanghai Xunji Electric Equipment Co., Ltd.

Pipe gallery (common ditch) wireless communication solution
Detailed description
Pipe gallery (common ditch) wireless communication system includes intercom dispatching communication subsystem (wireless intercom), FM broadcast communication subsystem, public security firefighting Analog communication introduction subsystem and public security digital communication system introduction subsystem.
) Intercom dispatching communication subsystem (wireless intercom)
The dispatching wireless communication system provides mobile communication means between various working surfaces inside the pipe gallery, covering the pipe gallery management area and important equipment rooms. The system should be designed to establish flexible communication between maintenance, rescue, patrol and other personnel in the pipe gallery and the management personnel of the control room. It can transmit information, notifications and information to the staff in the pipe gallery through the dispatch base station of the control center. Orders, etc., and promptly conduct orders and personnel dispatch for emergencies. And can establish a link with outside telephone through dialing system. The dispatch wireless communication system adopts analog communication mode. The entire pipeline corridor shares a set of uplink and downlink frequency points.
Control center personnel can call wireless intercom personnel in the pipe gallery and at the pipe gallery entrance through the dispatch base station. It can carry out all call, group call and selective call management, monitoring, call recording and other functions for all intercoms. (If you need to make outgoing calls, the system can be equipped with a wireless adapter and an intercom equipped with a dialing function.) Wireless intercom personnel in the pipe gallery and at the pipe gallery entrance can communicate with each other.
) Fire and public security wireless communication subsystem
The pipe gallery wireless access system can provide a relay transfer function for the communication between public security and fire intercoms and their corresponding central station, allowing traffic police and fire fighters to communicate in the pipe gallery area. Communication between the internal and external handheld stations is unobstructed. Realize the introduction and coverage of firefighting and public security wireless communication systems.
Including the following frequency bands and the number of signals that need to be introduced
Public security digital trunking ~, no less than the carrier
Public security fire simulation ~, no less than the channel
Public security traffic police simulation ~, no less than the channel In the channel
) FM broadcast communication subsystem
realizes the introduction of full-band (~) FM broadcast.
The FM broadcast system can receive signals from several channels (the city’s main FM broadcast signal) and forward them to the pipe gallery so that vehicles traveling in the pipe gallery can receive the broadcast. The system has full-band broadcast capabilities in an emergency. The channel has the function of inserting broadcasts. In emergency situations, rescue information can be broadcast to the car radio through FM radio.
)System networking
The pipe gallery dedicated wireless communication system combines the above system communication platforms to uniformly meet the needs of public security, fire protection, dispatching, broadcasting, operation, and safety requirements in the pipe gallery. The radio frequency signals of all dedicated wireless communication subsystems are combined into one leaky cable to save space resources in the pipe gallery.
) System Monitoring
The signal relay equipment of all dedicated wireless communication subsystems (including near-end/remote optical fiber repeaters, frequency selective repeaters, etc.) should have remote monitoring functions. Monitoring personnel Remote monitoring and control can be completed through the network management terminal computer set up in the pipe gallery control center.
Pipe gallery (common trench) wireless communication system indicators
Working frequency band FM broadcast~
Scheduling~
Firefighting routine~
Public security routine~
High incidence of base stations Low income, mobile station low income and high income.
Channel interval intercom
Number of frequency points, FM broadcasting in the entire frequency band (not more than 1 channel)
Scheduling 2 duplex channels (different transmission and reception.)
Public security regular individual inter-frequency channels
Firefighting local inter-frequency channels, local forwarding inter-frequency channels
The system signal-to-noise ratio is better than
The sound quality of the walkie-talkie reaches or exceeds the five-level rating standard for mobile communication voice quality.
FM broadcast transmission coverage signal is greater than
The time probability and location probability are better than %
Features of pipe gallery (common ditch) wireless communication system
All adopt modular structure, easy to maintain and expand
br/> Fully digital
Easy to debug, the frequency is directly input through the computer and stored directly
Restarting directly enters the state before power outage without setting
The power amplifier uses a microstrip transistor circuit, and the rest of the It is composed of imported integrated circuits.
The whole machine has a large dynamic range and low power consumption.
The gain has a large adjustable range and is easy to debug.
The system has low noise.
High uplink and downlink isolation, stable and reliable.
Small size and easy to install.