Airport instrument landing system equipment pronunciation early warning circuit

• Main Authors: TAO RAN, LUO JUN, TONG KEWEN, TONG SHAOJIE
• Format: Patent
• Language: English
• Published: 11.11.2015
• Subjects: ALARM SYSTEMS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

The utility model discloses an airport instrument landing system equipment pronunciation early warning circuit, characterized by to the airport instrument landing system equipment of two kinds of differences of NM7000A and NM7000B, obtain the sampled singal respectively in the device interface circuit, to the NM7000A equipment that has optical coupling isolation, the sampled singal is direct sends into the main circuit as incoming signal, NM7000B equipment to no optical coupling isolation, the main circuit is sent into through the optical coupling isolation circuit isolation succeeding crop for incoming signal to the sampled singal, the arduino chip is judged incoming signal in utilizing the main circuit, incoming signal is not for just often producing drive signal judging, send drive signal to pronunciation early warning circuit and light indication circuit when judging incoming signal for the early -warning singal, utilize pronunciation early warning circuit circulation newspaper to broadcast early warning device's name, disappear or restrain pronunciation early warning circuit through restraining the switch by the manual work until the early -warning singal. The utility model discloses simple structure, the equipment is easy, the early warning dependable performance.