Analysis of navigation aid lighting system in civil aviation airport
A simple approach lighting system
It consists of a central line lamp and a horizontal lamp. Type A is used for non-instrument runways, and type B is used for non-precision approach runways. The total length should be 420m, and a 30-meter-long or 18m horizontal light should be installed at a distance of 300m from the runway entrance. The longitudinal spacing of lamps forming the center line shall be 60m.
A simple method, the midline light is single light, red, omnidirectional and parallel, without light intensity adjustment.
B-type simple method, 3 meters long light row, white, one-way, series, light intensity is divided into five levels. The switching time of emergency power supply shall not exceed 15 seconds.
Two. First-class precision approach lighting system
The total length should be 900 meters, not less than 720 meters, and a row of 30 meters long should be formed 300 meters away from the runway entrance. White, one way. The longitudinal spacing of the center line lamp is 30m. Class I and Class B midline lights are short row lights with a length of at least 4m.
The sequential flash must flash twice a second, one after another from the outermost light to the runway entrance.
The switching time of emergency power supply shall not exceed 15 seconds. The sequential flash lamp supplies power to the parallel circuit with three-level dimming, and the rest is supplied by two series circuits with five-level dimming.
Class III, II and III precision approach lighting systems
The total length should be 900 meters, not less than 720 meters, and a row of 30 meters long should be formed 300 meters away from the runway entrance. White, one way. The distance between the center line lights is 30 meters. There are also side lights and two rows of horizontal lights extending 270 meters to the runway entrance, one row is 0/50 meters away from the entrance/kloc and the other row is 300 meters away from the entrance. Sequential flash memory is the same as level I.
The horizontal line lights at a distance of 0/50m from the entrance/kloc-shall fill the gap between the central line lights and the side line lights. 300m away from the center line15m.
Side lights consist of short rows of lights that emit red light.
The switching time of emergency power supply within 300m of the runway entrance shall not be greater than 1 sec, and the rest shall not be greater than15s.
The sequential flash lamp supplies power to the parallel circuit with three-level dimming, and the rest is supplied by two series circuits with five-level dimming.