International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper describes a data acquisition system with integral signal conditioning
capability. It is a distributed bus oriented system which greatly reduces the
amount of wiring and structural penetrations required in previous systems used
for this purpose. The system interfaces with virtually all of the transducer types
existing on operational aircraft as well as those typically used for flight testing
and proofing such as the strain gauges. It outputs data in digital form to a central
unit which combines this data with other aircraft operational parameters for
recording on tape or telemetry to the ground.
The system consists of a remote multiplexer (RMUX) which provides the
formatting and central processing functions and has provision for 16 plug-in
signal conditioning modules. It also has provision for up to 20 external
multiplexers (EMUXes) which are designed to service a cluster of like sensors in
a local area. EMUX types include bridge, thermocouple, and a highly integrated
pressure scanner unit. Signal conditioning and processing functions include
input transient protection, variable blocks of gain, analog pre-sample filtering,
and precision bandlimiting using digital techniques .
The penalty for moving the acquisition units to remote locations on the aircraft
as compared to previously used cabin mounted equipment is a much more severe
environment. Temperature extremes and vibration are particularly severe
around the engines. Because of the planned use on operational aircraft,
provisions to prevent lightning propagation to the cabin are a significant future.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608871 |
| Date | 10 1900 |
| Creators | Maschhoff, Robert H., Johnson, David W. |
| Contributors | Gulton Data Systems, Boeing Commercial Airplane Group |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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