Remote, PCM-controlled, multi-channel radio frequency FM telemetry system for cryogenic wind tunnel applicationA telemetry system used in the NASA-Langley cryogenic transonic wind tunnel to obtain rotational strain and temperature data is described. The system consists of four FM transmitters allowing for a remotely controlled PCM combination. A rotating four-contact mercury slip-ring is used as an interface between the fixed and rotating mechnical structures. Over 60 channels of data on the main fan disk and blade structures have been obtained. These data are studied to verify computer predictions and mechanical life. A series of block diagrams are included.
Document ID
19910035070
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Diamond, John K. (NASA Langley Research Center Hampton, VA, United States)