PC-based PCM (Pulse Code Modulation) telemetry data reduction system hardware
The Solar Energy Research Institute's (SERI) Wind Research Program is using pulse code modulation (PCM) telemetry systems to study horizontal-axis wind turbines. SERI has developed a low-cost PC-based PCM data acquisition system to facilitate quick PCM data analysis in the field. The SERI PC-PCM system consists of AT-compatible hardware boards for decoding and combining PCM data streams and DOS software for control and management of data acquisition. Up to four boards can be installed in a single PC, providing the capability to combine data from four PCM streams direct to disk or memory. This paper describes the SERI PC-PCM system hardware, focusing on the practicality of PC-based PCM data reduction. A related paper highlights our comprehensive PCM data management software program which can be used in conjunction with this hardware to provide full quick-look'' data processing and display. The PC-PCM hardware boards support a subset of the Inter-Range Instrumentation Group (IRIG) PCM standard, designed to synchronize and decommutate NRZ or Bi-Phase L PCM streams in the range of 1 to 800 Kbits/sec at 8 to 12 bits per word and 2 to 64 words per frame. Multiple PCM streams (at various rates) can be combined and interleaved into a contiguous digital time series. Maximum data throughput depends on characteristics of the PC hardware, such as CPU rate and disk access speed. 7 refs., 6 figs., 4 tabs.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- Sponsoring Organization:
- DOE/CE
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 7024568
- Report Number(s):
- SERI/TP-257-3662; ON: DE90000316
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
170600* -- Wind Energy Engineering
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
COMPUTER ARCHITECTURE
COMPUTERS
DATA ACQUISITION
DATA ACQUISITION SYSTEMS
DATA ANALYSIS
DIGITAL COMPUTERS
HORIZONTAL AXIS TURBINES
MACHINERY
MICROCOMPUTERS
NOISE
PERSONAL COMPUTERS
PULSE CODE MODULATION
TURBINES
TURBOMACHINERY
WIND POWER
WIND TURBINES