Shulou(Shulou.com)06/02 Report--

Design Scheme of clock system in Airport Terminal

In order to meet the needs of civil airport construction and development and ensure the design quality of weak current system engineering of civil airport terminal building, this clock system scheme is designed according to "MHT5019-2014 Civil Airport Terminal clock system Engineering Design Code".

Analysis of special terms

1. Master clock: a device that accepts standard satellite time information, carries out high-tech correction and processing with its own time signal source, and then sends time signals to its subordinate subsystem.

2. Sub-clock: a device that receives the signal sent by the mother clock for display

3. GPS clock signal: Greenwich mean time signal sent by global positioning system

General rules

Master clock: SYN4505 standard synchronous clock

Sub-clock: SYN6109 NTP sub-clock

A, the clock system of the common civil airport terminals should be able to provide accurate and unified time services for airport staff, passengers and computer management systems.

B. The general airport only has a regular mother clock system to display Beijing time information. For airports with international flights, a world clock should be added to show the local time of the city concerned.

The type of sub-clock can be divided into one-sided clock and two-sided clock, single-sided clock can use pointer or digital display. The double-sided clock should be digitally explicit. The display content of all kinds of sub-clocks can be determined according to the actual situation, but it is appropriate to display at least minutes and seconds, and the digital display clock should be non-reflective to ensure the display effect.

Installation position of sub-clock

1. Sub-clocks should be installed in command and dispatching centers, broadcast rooms, conference rooms, navigational meteorological information rooms, unit signing rooms and other places with special requirements for time.

2. For flights with special requirements for time, it is appropriate to install sub-clocks for dynamic display of computer rooms and other equipment rooms.

3. Sub-clocks should be installed in conspicuous places such as welcoming passengers, seeing off passengers, waiting for flights, check-in formalities, passages, etc., and sub-clocks should also be installed in passenger restaurants and rest places.

4. A sub-clock should be installed in the baggage sorting and pick-up hall.

5. For the aeronautical display system which is uniformly calibrated by the mother clock, the installation of the sub-clock should be reduced or cancelled as far as possible in the place where there is an aerial display terminal that can display the time.

The specification of the sub-clock shall be determined according to the height of installation and the distance of sight. The installation height is generally 2.5m~5m from the ground, which can be adjusted appropriately on special occasions, but it should be beautiful. Requirements for the use of names.

Power supply requirements

A, the power supply of the mother clock and sub-clock is generally supplied by the power supply of the electronic equipment room where the system is located, or by the nearest reliable power supply when the power supply is far away.

B, the power supply voltage of the mother clock system and the mother clock equipment, generally according to the equipment requirements, when it is necessary to increase the output signal voltage of the mother clock, it is necessary to ensure that the working voltage of the mother clock and the signal current of each loop are within the allowable range.

The airport terminal clock system can be applied to important urban public buildings, such as stations, universities, traffic junctions, sign buildings and other places, as well as mobile and fixed telephone time messages in the telecommunications industry. It provides accurate public time, provides convenience for people's daily life, and avoids the inconvenience caused by the inaccurate clock.

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