A low-cost infrared telemetry system for kilohertz-bandwidth data acquisition
A telemetry system is described that transmits data from three 8-kHz analog inputs by means of an infrared-optical-digital communications channel. This system is used to acquire accelerometer data on a rocket sled during its 300-m flight. An optical communications channel at 950 nm is used to send digitally encoded analog signals from the sled to a fixed receiver. The signal is recorded and decoded by a computer. The transmitter includes a differential amplifier and low-pass filter for each input channel. Excitation for piezoresistive accelerometers is also provided. Each input channel is sampled and digitized at a 16-kHz rate. The transmitter is built on a single printed-circuit card measuring 7.5 cm by 23 cm, weighing less than 450 g including batteries. This system can be used on tests involving destruction of the transmitter because of its low cost. 7 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOD
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6907739
- Report Number(s):
- LA-UR-90-1434; CONF-9003149--2; ON: DE90010616
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
426000 -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
440600* -- Optical Instrumentation-- (1990-)
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450000 -- Military Technology
Weaponry
& National Defense
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990300 -- Information Handling
ACCELEROMETERS
COMMUNICATIONS
COST
DATA ACQUISITION
DATA ACQUISITION SYSTEMS
DATA TRANSMISSION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRICITY
FLIGHT TESTING
FREQUENCY ANALYSIS
IMPACT SHOCK
IMPLEMENTATION
INFRARED SPECTRA
LIGHT EMITTING DIODES
MEASURING INSTRUMENTS
MEASURING METHODS
MISSILES
MODULATION
NOISE
OPTICAL SYSTEMS
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
PIEZOELECTRICITY
POWER DENSITY
RECORDING SYSTEMS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SPECTRA
TELEMETRY
TESTING