Airport navigation aid light regulator experiment table

Abstract

The invention discloses an airport navigation aid light regulator experiment table comprising an analog load which is connected with the output end of an airport navigation aid light regulator. The analog load comprises N power resistance branches which are mutually connected in series; multiple switching circuits which are respectively connected in parallel with all the power resistance branches, wherein connection of the power resistance branches connected in parallel with the switching circuits with the analog load or disconnection with the analog load through bypassing can be realized by controlling the switching state of the switching circuits; a current detection module; a communication interface; and a controller which is connected with the current detection module and the communication interface. A constant current calibration point test, an output open-circuit voltage test, a maximum output load capacity test and an insulating resistance online monitoring unit error test of the airport navigation aid light regulator can be realized.

Description

technical field [0001] The invention relates to the field of airport navigation aids, in particular to an experiment bench for dimmers of airport navigation lights. Background technique [0002] The airport navigation aid lighting system is a necessary visual aid to ensure the normal take-off and landing of aircraft at night or in low visibility conditions. Among them, the constant current dimmer is the core equipment in the airport navigation lighting system. Its performance determines the stability, reliability and economy of the airport navigation lighting system, and it is related to the safety of aircraft takeoff and landing and taxiing. Closely related. The load of the constant current dimmer is composed of halogen bulbs distributed in the flight area connected in series through the isolation transformer and the loop cable. At present, the problems in the field of airport navigation aids are: [0003] 1. For new airport users or users who purchase new machines, afte...

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Problems solved by technology

[0003] 1. For new airport users or users who purchase new machines, after the dimmer is delivered to the site and installed in place, a stand-alone test must be carried out. The usual practice is to run it for a period of time with no load or load short-circuit (generally one week). If there is no fault, then connect the real light load to test, but in the process of the test, due to the performance problem of the dimmer, the phenomenon of burning a large area of ​​the circuit or even the light load of the entire circuit occurs from time to time, which increases the test cost

[0004] 2. For general old airport users, after the dimmer fails, the lighting station will replace the parts and repair it on site, but the dimmer after repair may not be able to return to normal, and there is a risk of circuit lights being burned out and repairing and replacing lights

[0005] 3. For dimmer manufacturers, product testing and aging must also be carried out. The test bench used is usually composed of hundreds of real light loads connected in series. Since each dimmer needs to be aged for dozens of hours, the dedicated The life of halogen bulbs is only about 2000 hours and the price is expensive, which increases the production cost of dimmer manufacturers

[0006] 4. Item 2.9.1 of AP-140-CA-2009-1 of "Civil Airport Navigational Lighting System Operation and Maintenance Regulations" stipulates that the output current calibration of the dimmer is carried out once a year, but in fact most airports are only equipped with General-purpose clamp-on ammeters cannot meet the accuracy requirements of dimmer output current calibration. In practice, unqualified dimmers have been found in an airport in South China and an airport in Northeast China. Can request the manufacturer to provide services, affecting the actual navigation effect

[0007] 5. In the airport navigation lighting system, the lamps are almost all installed outdoors, and the power supply cables are mostly buried in the field. Due to environmental factors such as earth temperature, humidity, and mold, it is easy to cause water branches, and then the insulation of the cables changes. Poor, light circuit insulation resistance changes

At present, most airport navigation light dimmers are equipped with an insulation resistance online monitoring unit, which is used to monitor whether the insulation condition of the light circuit is good, but they cannot check the detection error of the insulation resistance online monitoring unit, which can only be used as a reference and false alarm and leak alarms occur from time to time

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