A beacon is a deliberately designed device designed to draw attention to a specific location.
Beacons can also be combined with semaphoric or other indicators to provide important information, such as airport status, with the color or rotation pattern of the airport beacon, or delayed weather as indicated in the weather beacon mounted on the top of a tall building or similar site. When used in that mode, beacons can be considered as optical telegraph form.
Video Beacon
Beacons help guide navigators to their destination. This type of navigation beacon includes radar reflectors, radio signals, sonic, and visual. The visual beacons range from small, single-stack structures to large lighthouses or light stations and can be located on land or on water. Beacon lights are called lights ; an uninterrupted flare called daybeacons .
Hand beacons are also used in aircraft marshalling, and are used by marshal to instruct crew members as they move around the active airport, heliport or aircraft carrier.
Maps Beacon
For defensive communication
Classically, beacons are lit in famous locations in the hills or high places, used either as lighthouses for navigating at sea, or to signal to the land that the enemy forces have come to, to warn the defense. As a signal, the beacon is an ancient form of optical telegraph and is part of a relay league.
This kind of system has been around for centuries in most of the world. The ancient Romans used beacon and flare images on several occasions in the Trajan column.
In the 10th century, during the Byzantine Arab War, the Byzantine Empire used a flare system to send messages from the border with the Abbasid Caliphate, crossing Anatolia to the imperial palace in the Byzantine capital, Constantinople. It was designed by Leo the Mathematician for Emperor Theophilos, but was removed or radically limited by the son and successor of Theophilos, Michael III. Beacons were then used in Greece as well, while the surviving parts of the beacon system in Anatolia appeared to have been reactivated in the 12th century by Emperor Manuel I Komnenos.
In Scandinavia many hill fortresses are part of a flare network to warn against an attacking deterrent. In Finland, this flare is called vainovalkeat , "fire of persecution", or vartiotulet , "fire guard", and used to warn Finn's settlement of an upcoming attack by the Vikings.
In Wales, Beacon Brecon was named for beacons used to warn of approaching British robbers. In England, the most famous example is a beacon used in Elizabeth England to warn the approaching Spanish Fleet. Many hills in England were named Beacon Hill after such flare. In the Scottish border state, the flare fire system was established at one time to warn of attacks by the British. Hume Castle and Eggerstone and Soltra Edge are part of this network. The Great Wall of China is also a flare network.
In Spain, Granada's border in the Crown region of Castile has an elaborate flare network to warn Moorish pirates and military campaigns.
On vehicle
Spinning vehicle bears or flashing lights are affixed at the top of the vehicle to attract the attention of vehicles and pedestrians around them. Emergency vehicles such as fire engines, ambulances, police cars, tow trucks, construction vehicles, and snowmobile carry flare lights.
The color of the lamp varies according to jurisdiction; typical blue and/or red colors for police, fire, and medical-emergency vehicles; amber for danger (slow moving vehicles, large loads, tow trucks, security personnel, construction vehicles, etc.); green for volunteer firefighters or for medical personnel, and purple for funeral vehicles. Beacons can be built with halogen lamps similar to those used on vehicle headlights, xenon flashtubes, or LEDs. Incandescent lights and xenon light sources require the vehicle engine to continue running to ensure that the battery is not depleted when the lamp is used for a long time. Low power consumption LEDs allow the vehicle engine to remain turned off while the lights are operating in dots.
Other uses
Beacons and bonfires are also used to mark the occasion and celebrate the event.
Mishna describes the system of signs used by the high court in Jerusalem to communicate the new moon's declaration to the Jews in Israel and Babylon.
Beacons are also suspected to have been abused by shipwreck. Dark fires in the wrong position will be used to steer the ship against the shelf or beach, so that its cargo can be looted after the ship sank or ran aground. However, there is no proven historical event of such a deliberate shipwreck.
In a wireless network, a beacon is the type of frame sent by an access point (or WiFi router) to indicate that it is active.
Beacon-based Bluetooth periodically sends data packets and this can be used by software to identify the location of the beacon. This is typically used by indoor navigation and positioning apps.
Beaconing is a process that allows the network to fix network problems. The stations on the network notify other stations in the ring when they do not receive the transmission. Beaconing is used in Token ring and FDDI networks.
In fiction
In the tragedy of Aeschylus Agamemnon , the chain of eight flares manned by so-called lampadÃÆ'³phoroi informed Clytemnestra in Argos, within one night, that Troy had just fallen under her husband control of the king of Agamemnon, after a famous ten-year siege.
In the high fantasy novel J. R. R. Tolkien, Lord of the Rings , a series of flares warned throughout the territory of Gondor when the kingdom was under attack. These beacon stations are manned by messengers who will bring news of their enlightenment to Rohan or Belfalas. In the film adaptation of Peter Jackson's novel, the flare serves as a connection between two realms of Rohan and Gondor, reminding each other directly when they need military help, as opposed to relying on messengers as in the novel.
In retail
Beacons are sometimes used in retail to send digital coupons or invitations to passing customers. Beacons are sometimes used for End-to-End Item Level Monitoring [1]
See also
- Aerodrome beacon
- Beacon mode service
- Beacon School
- Belisha flare
- Locator emergency flare
- Emergency position station radiobeacon (ELT, PLBs & EPIRBs)
- iBeacon
- Lantern
- Headlight
- Alexandria Lighthouse
- Milestone/Kilometric dots
- Polaris
- Strobe flare
- The timer
- The track is lit
- Warning light (disambiguation)
- Weather beacons
- Web beacon
References
Source of the article : Wikipedia
0 Comments