With the rapid development of my country's civil aviation industry, there are more and more new construction, reconstruction and expansion projects in airports across the country. It has become inevitable to build a high-standard, high-intelligence, high-integration, and ultra-stable airport public address system. It is also imperative for the public broadcasting system to develop towards intelligence, integration and networking.
1. Civil Aviation Airport Public Address System Solution
1. Functional requirements of the airport terminal broadcasting system
As an important part of the airport's daily service and public broadcasting communication system, the public broadcasting system of civil aviation airports often needs to operate and work around the clock. All systems must be complete and intelligent; the equipment must be safe and stable. Compared with the public address systems of office buildings, hotels and shopping malls, the public address systems of civil aviation airports have many unique requirements:
The main function of the broadcasting system is to broadcast the airport's flight dynamic information, airport business information, special announcements and emergency events in each public area and office area of the airport terminal.
The broadcasting methods are automatic broadcasting, semi-automatic broadcasting, and manual broadcasting.
The broadcast source comes from the background music, the broadcast microphone of the fire center, the manual call station of the broadcast room, the local broadcast of each boarding gate and service counter, and the backup information of several automatic speech synthesis systems.
The broadcast sources are prioritized, and emergency broadcasts have the highest priority. In case of emergency, the normal broadcast of the corresponding area will be cut off and replaced by the emergency broadcast and safety evacuation broadcast from the fire center, and the broadcast content of other broadcast areas will remain unchanged.
The digital matrix system is adopted, and the partition broadcasting function can be set without changing the hardware connection.
Noise detection and volume automatic control system, in the case of unmanned operation, the corresponding area will get the sound field of volume and sound quality.
The working status of each equipment in the system operation is monitored by the system management server and equipment management workstation, the fault information is displayed on the computer display screen, and the well is printed for each system to make an analysis report on the fault.
The system will be conveniently set up and configured using system management software.
The system has log management and inspection functions.
The system has the function of managing and maintaining the flight information in the local database.
The system can directly or indirectly receive the time calibration signal of the clock system, and automatically calibrate the system equipment.
The public address system can adjust the broadcast volume of each broadcast zone.
Second, the characteristics of the broadcasting system
(1) There are many divisions and many program sources. A large and medium-sized airport terminal can have as few as 50-60, as many as hundreds of broadcast divisions, and each broadcast division broadcasts different broadcast contents at the same time. In addition to the conventional audio source DVD, deck, and radio, the program source also has multiple microphone broadcasts and broadcasts in many different languages.
(2) Large amount of business broadcast data
The main purpose of the airport broadcasting system is business broadcasting. The amount of business broadcasting data is very large. In an airport terminal with 50 flights per hour, the hourly control signal is about 24MB, and the bandwidth occupied by the audio signal is about 200M.
(3) High reliability and safety
Due to the important position of business broadcasting in the airport terminal, its safety and reliability requirements are very high, and efforts should be made to reduce the failure rate to zero. Therefore, in addition to its own high reliability and high stability, the system equipment, All major equipment must have backup redundancy design. The system should have line self-diagnosis function and fault alarm function.
(4), high integration
In addition to the integration with the automatic fire alarm system, the pilot flight information display system, central database, clock system, internal communication system, etc. are also required for integration.
3. Detailed description of system functions
(1): Layout design of speakers
The automatic broadcasting system is required to ensure that in the area with BGM background music, the sound pressure level of the farthest point in the playback range is ≥70dB or 15dB higher than the ambient background noise (the most basic requirement). Emergency broadcasting requires that the walking distance from any part of the channel to the nearest speaker should not exceed 25 meters, and the rated power of each speaker should not be less than 3W.
Since the airport hall is a public place, the background noise is relatively large, and the background noise is greater than 60dB. The public broadcasting signal must be more than 15dB greater than the noise to be clear and effective. Therefore, when designing, the sound pressure level of the background music is required to be greater than 75dB, and the frequency response characteristic is 150Hz to 5kHz, ±3dB. Since the terminal building, the air traffic control tower and the air traffic control meteorological complex are all hoisted with ceilings, the CBH-21T sub-frequency ceiling coaxial ceiling speakers are used. Wall speakers and household wall columns. In the parking lot and parking lot, the broadcasting space is large, and the early reflection in the outdoors is small. Horn speakers and directional speakers are used to broadcast the left corner areas.
The layout of the speakers is designed in strict accordance with the specifications. According to different places, choose the appropriate model and specification of the loudspeaker; according to different environmental noise requirements, determine the power and quantity of the loudspeaker.
(2), automatic broadcast system (the interaction between the broadcast system and the air traffic management system, the main control software of the broadcast system is used for secondary development)
In addition to the daily regular background music playback and fire-fighting radio intrusion, the airport public broadcasting system is mainly controlled by the flight management system to automatically broadcast dynamic information of the flight. The automatic broadcast of flight information mainly depends on the change of flight information. These changes mainly include: flight status changes (such as check-in, boarding, arrival, departure, delay, cancellation, alternate, etc.), flight time information (including planned time, estimated time, etc.) time and actual time, etc.), flight resource information (such as boarding gate, check-in counter, baggage carousel information, etc.). When the information changes, the air traffic management system will automatically generate broadcast sentences and control the broadcast system to make voice broadcasts through the linkage software function between the systems. The information that can be broadcast includes: flight number, terminal name, arrival or departure time, Check-in counter number, baggage claim carousel number, boarding gate number, flight status (departure, arrival, delay, cancellation, alternate, boarding, check-in, etc.), remarks, standard information (such as no smoking, beware of pickpockets, etc.) , emergency messages (such as fire alarms).
The airport automatic broadcasting system is one of the airport's intelligent integrated systems. Its main function is to provide comprehensive and timely automatic voice information playback for the airport, so that passengers can obtain the required information more quickly and accurately. The content broadcasted by the automatic broadcast system has the following categories, including: flight information broadcast, emergency broadcast, airport fixed standard information, temporary information, and unplanned information. No matter the size of the airport, the automatic broadcasting system department can be applied. The automatic broadcasting system supports multi-language broadcasting. The flexible language code definition allows users to customize the type of broadcasting language. Commonly used languages can include English, Chinese, Japanese, French, German, Spanish, etc. The automatic broadcast system allows users to add language types at any time according to their needs, and can specify certain languages for broadcast according to different broadcast types.
The information broadcasted by the automatic broadcasting system has a mellow voice, clear and accurate pronunciation, and provides timely, accurate and unambiguous voice information for the vast number of passengers, the public, the staff of the airport leasing department and the airport operation department and management personnel.
The functions of the automatic broadcasting system can include fully automatic broadcasting, semi-automatic broadcasting and manual broadcasting. Fully automatic broadcasting means that the system automatically generates the messages that need to be broadcast in real time according to the flight dynamic information according to the predetermined broadcasting category, and sends them to the relevant broadcasting area without any manual intervention; Type, flight to be broadcast, priority of the message and other related information, click the confirmation button, the system will automatically broadcast the combined message; while manual broadcast means that the user selects the area to be broadcast through the graphic terminal, and uses the call station to broadcast. Manual broadcast.
(3), real-time broadcasting and remote broadcasting
The system matches the call station of the network broadcast center and the remote broadcast call station in the aviation management center and the broadcast room, and is used for system managers and broadcasters to carry out all emergency broadcasts and business broadcasts except the automatic broadcast system. The system equipped by each call station The permissions are not the same. When each system user and the corresponding broadcast task meet on the same broadcast terminal, the system will automatically play according to the high-level broadcast user. The system is also equipped with a broadcast microphone in each boarding gate area, which is used by ticket inspectors to make voice broadcast reminders and search for passengers who do not board the plane on time.
(4) Fire-fighting interlock broadcast
The airport broadcasting system has an intelligent interface linked with the fire protection system, which is controlled by the fire protection system. When the fire protection system is activated, the public broadcasting system will immediately switch to the fire protection broadcasting state no matter what the working state is. The fire announcement has the highest priority in the system. The emergency broadcast system and the background music broadcast system share the control host, speakers and distribution network, and according to the fire zone, in the event of a fire or emergency, they can automatically switch over and broadcast fire accidents to the accident area with sufficient volume. . The configuration of the power amplifier of this system can meet the requirement of 24-hour continuous broadcasting to all areas.
(5), system remote sub-control function
The broadcast system is matched with the remote sub-control center, and the user name of the system can be matched to control the broadcast task editing of the entire broadcast system. There is no need for managers to go to the main control room to perform various operations, and the requirements for controlling the broadcasting system can be realized on the sub-control center. The sub-control system can be configured with multiple sets without restrictions. The system administrator matches the corresponding user name and authority. Can.
(6), system backup function
The main control server is installed with a genuine operating system, and comes with a system-specific backup and restoration tool. When the system needs to be updated during later use, just follow the operating instructions to restore the system. No need to redo the operating system. The main control software also provides a software data backup function. After the broadcast master control software is set for various broadcast tasks, a comprehensive broadcast software data backup can be performed on the broadcast software, and a regular broadcast software data backup can also be performed on the software during use. , If you need to update the software in the later use process, you only need to restore the software data backup, and all the settings and task programming of the broadcast software will be restored as new, and there is no need to re-set each broadcast.
(7), permission level settings
The software can set up multiple users to use this system software or VOD terminal, which is managed by the administrator, and the administrator assigns the system account and password to each user, as well as the use authority and the number of terminals. There are high and low levels, the administrator has the highest use authority, and only the administrator can set or change the setting parameters of the system.
(8) Radio program monitoring
Monitor speakers are installed in the main room and sub-control center, which can monitor all broadcast programs in real time.
(9), timer switch machine
The host can set the opening and closing time according to the usage time of the broadcasting system. Ensure the cleanliness of the working environment and increase the service life of the host. The power of each broadcast terminal in the system is intelligently controlled by the main control system, and its switches are remotely controlled. Each broadcast area can also manually turn on the power of the equipment locally, and broadcast directly locally.
(10) The operation is convenient and the display is intuitive.
Equipped with a large-screen LCD display that can display the current working status in real time, and has the function of man-machine dialogue. Large LCD display during working hours, Chinese menu can be set
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5,000 .,.