The role of optical fiber telephone in the construction of the pipe gallery

The role of the pipe gallery fiber optic telephone in the pipe gallery construction!

Do you have any understanding of the urban underground pipe gallery? It is estimated that many people do not understand it. Nowadays, in the construction process of many pipe gallery, there will be a problem, that is, the communication problem of our pipe gallery. If it can’t be solved, let’s let Shenzhen Babaitong Intelligence give you a detailed introduction on how to solve the communication problem of the pipe gallery. The following is the specific content:

1. Requirements for wireless communication

1. The wireless intercom system of the underground city integrated pipe corridor meets the daily calls of multiple departments such as construction, debugging, maintenance, and inspection. Each group can talk independently without interference; it can meet group calls and individual calls under special circumstances. , Full call, etc.;

2. The wireless intercom system of the underground city integrated pipe gallery needs to cover the entire pipe gallery to meet the communication between the ground and the pipe gallery without blind spots;

3. The newly constructed pipe gallery trunking wireless intercom system, in addition to the basic call functions such as single call, group call, and full call, also has background scheduling, inspection, and positioning functions;

4. In order to save investment and meet the urgent communication needs of the pipe gallery wireless intercom project, the base station partly rents the operator's base station resources;

5. The frequency used by the wireless intercom system of the underground city integrated pipe gallery is the legal frequency approved by the local radio committee;

2. Design of the wireless intercom system of the underground city integrated pipe gallery cluster

According to customer needs, in line with the needs of saving investment and rapid deployment, the base station uses the original pipe corridor wireless intercom system, which can cover the entire main urban area. The base station provides 4 communication groups to meet the needs of construction, debugging, maintenance, and inspection Work in multiple departments requires requirements. As the pipe corridors are distributed in various places in the urban area, and they are all underground with serious signal shielding, for the introduction of wireless communication signals, the separate layout of base station equipment faces problems such as high cost and difficulty in networking. This project uses the developed wireless repeater Open circuit technology uses directional antennas erected on the ground to connect wireless signals to the wireless open circuit repeater, and connect wireless signals to the underground pipe gallery. Leaky cables are used inside the underground pipe gallery to achieve even coverage of the signal inside the pipe gallery.

Emergency telephone

The wireless repeater can be installed on the wall or installed in the machine room of the pipe gallery. It is equipped with 1KVUPS to ensure normal communication when the power is interrupted. Leaky cables are installed on the weak current bridge on the top of the pipe gallery with special fixtures. The entire system uses the signal source of the original system to achieve unified dispatch and unified communication between ground, underground and dispatch centers.

3. Design of wireless intercom inspection system for pipe gallery industry

In the management system of operators in the pipe gallery industry, in order to enable managers to timely understand and accurately grasp the production dynamics of their posts, and to control and handle various safety hazards such as running, leaking, dripping, and leaking, each area has implemented wireless intercom inspections. At the same time, the system is linked to the daily attendance assessment, and it has experienced various methods such as inspection bell, listing inspection, inspection instrument, inspection stick and so on. In order to realize the real intelligence of inspections, and require real-time recording of equipment conditions and timely confirmation and reporting during inspections, it is required to combine the inspection equipment with the basic intercom tools to build cluster inspections and routes , Playback and other functions.

1. There are problems with the traditional inspection system

Inspection bells, listing methods, and inspection sticks are the current mainstream methods, which are relatively backward and have potential safety hazards; inspectors hold the inspection stick with one hand and walkie-talkie in the other, which is extremely inconvenient to move and work. The off-line inspection stick can only come back to read the information when it is handed over. The information is not real-time, and the recordable data only stays on the "check-in", not combined with the specific business; it can only be supervised afterwards. There is a lot of recorded data, high cost, non-real-time method, can not be timely and fast, low efficiency, narrow application area; inspection in place and invalid recorded data to grasp its authenticity A large amount of inspection information is inconvenient to save, easy to lose, and time-consuming. Information inquiry is inconvenient.

2. Pipe gallery digital trunking wireless intercom inspection system

The pipe gallery digital wireless intercom cluster inspection system is based on digital trunking technology, adopts active RFID technology, innovatively combines walkie-talkies with RFID technology, and combines inspection walkie-talkies with traditional inspection sticks, which can greatly simplify The inspection method of the inspector.

Emergency telephone

Inspection personnel only need to carry an inspection walkie-talkie to complete the inspection work. Compared with the past security personnel, they need to carry the inspection stick in one hand and the walkie-talkie in the other hand, which is not convenient for work. The staff installs a dispatching station integrated with the power supply and the vehicle platform in the command office. By connecting with the PC, the administrator can monitor the inspection situation in real time through the PC terminal. The inspection button selects a suitable place for installation according to the needs of the scenic management party. The digital wireless intercom inspection system can help you effectively supervise the inspectors and ensure their inspections are in place. The system can be used in security patrols, fire patrols, various patrols, equipment inspections, pipeline inspections and other fields, and can effectively improve the management level in these fields.

4. Digital wireless intercom system

1. Based on walkie-talkie

The wireless intercom system has the characteristics of flexibility, easy operation, fast voice transmission, and economical use. It is a basic means to realize production scheduling automation and modern management. The wireless intercom system is an independent radiating dual-frequency two-way automatic repeating communication system, which solves the communication signal cannot be covered due to factors such as the use of communication range or building structure, and is convenient for precise use when and where to contact such as security , Engineering, operation and service personnel, perform their duties in non-fixed locations in the management site. It can realize efficient and immediate handling of various events and minimize possible losses. Especially when an emergency occurs, a set of five intercom systems covering the entire pipe corridor is ubiquitous. It can quickly organize dispatchers to escape, rescue, rescue, etc., and effectively implement emergency plans. .

2. Introduction of WIFI wireless intercom system

WLAN is a short-distance wireless line transmission technology. It is a wireless frequency band that is open and universally used all over the world. Various wireless products around the world can use this frequency band. Because of this feature, most wireless products such as wireless routers currently work in this frequency band. The main equipment of the scheme includes access controller (AC) and access point (AP). It adopts a centralized network architecture and uses AC to be connected to the core switch side of the monitoring center to centrally manage the APs in the entire pipe gallery. AC has powerful multi-AP management capabilities, which can ensure the reliability of the entire WLAN wireless intercom system through multi-AC mutual backup.

Five, the advantages of digital wireless intercom system

1. Terminal

Efficient and safe dispatch management

The digital system has inherent security, which can prevent general eavesdropping using scanning equipment and other devices. 16 million call signs and group call signs can be called and monitored only when the frequency is the same and the call signs are correct. The chance is almost zero. Will not be annoyed by illegal users/interference signals. When the walkie-talkie rings, it must be a call related to the user.

Can double the channel capacity and reduce equipment costs

The digital channel machine divides the existing channel into 2 time slots, doubles the channel capacity, and does not need to add synthesis equipment. Expanded system capacity and reduced user investment.

Compatible with digital/analog systems, ensure smooth system transition, and protect user resources

Digital walkie-talkies can work in both analog and digital modes, allowing users to smoothly transition in a planned way according to their own plans, without interruption of communication. The digital walkie-talkie can simultaneously support analog channels and digital packet calls, and supports hybrid scanning of analog channels and digital talk groups. This makes cross-network mobile roaming possible to a certain extent, which greatly facilitates the use of users.

Digital sound quality, making the range of clear sound quality wider

The digital system has a unique ability to suppress environmental noise, even in a very noisy environment, the other party can hear clear speech, while the background noise is filtered out.

40% power saving

Due to the dual time slot characteristics of the digital channel machine, the transmission time is 50% less than that of the analog mode. Can save 40% of power consumption.

2. Central office

Rich data function

Chinese short message function: Chinese short messages can be sent using PC or hand and cart with buttons.

USB interface: It can be directly connected to PC and other electronic devices for data transmission, which is more convenient.

Safety management

It supports four authentication/encryption methods including WEP, WPA/WPA2–PSK, WPA/WPA2–802.1X, and WAPI to ensure wireless network security.

Terminal wireless access encryption: the wireless link data can be encrypted to ensure that the wireless network data can only be received and understood by the expected users.

Illegal equipment monitoring: Support WIDS/WIPS attack detection, monitoring, identifying, preventing, and countering illegal equipment, and refined management control. In terms of the number of users and business requirements in the pipe gallery, the dual-band WLAN transmission standard has a large bandwidth, and the overall 2.4G bandwidth is better than other wireless frequency bands, which increases the overall data transmission rate. WLAN is not limited to wireless voice and short data services. Through business workstations and management workstations, the WLAN system solution has a complete central platform management function, which can improve the efficiency of system operation and management. And because of the openness of the protocol and the high scalability, the WLAN solution can expand the auxiliary monitoring and intelligent functions of the integrated pipe gallery.

Smooth calls without interference

Set the two-way radios to the same channel. During intercom, the intercoms of different groups can talk at the same time without interference. In the static state, the conversation is smooth, but when you turn around frequently, occasional sound stuttering may occur. During the intercom, the WiFi wireless signal will be stuck for about one second in the middle of the signal drift along with the movement of the intercom. The entire intercom basically went on smoothly.

Safety management

Call security function, special audio coding format, encrypt the data in transmission to prevent others from eavesdropping and use, and call security.