Air data module
An air data module is a component of the navigation system on fly-by-wire aircraft, such as Airbus A320 or later Airbus.[1] Each unit converts pneumatic (air pressure) information from a Pitot tube or a static port into numerical information which is sent on a data bus.[2] This pressure information is received and processed by the Air Data Reference (ADR) component of the Air Data Inertial Reference Unit (ADIRU).[1] This processed information is then sent to a display management computer(s) that present information on the cockpit's primary flight display.[3] Airspeed information is also sent to the flight computers and other electronics.[4] Airspeed information is also sent to the autoflight subsystem (.e.g. flight management and guidance system).[5]
Construction
The air data module is a gas pressure sensor which converts mechanical forces created by gas pressure into digital signals that can be carried to the air data reference unit. ADM generally have a maintenance bus and communication bus, and a connector on the housing for a pressurized gas line that is connected to the Pitot tube or static ports. The maintenance bus can be EIA-485 and the communication bus can be ARINC 429[2][6]
References
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