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Accession number;01A0565391
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| Title;Development of a High-Rate and High-Resolution Data Acquisition System Based on a Real-Time Operating System. |
| Author;
IMANISHI Y
(Univ. Tokyo, Tokyo, Jpn)
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Journal Title;Journal of the Geodetic Society of Japan
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Journal Code:G0199A
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ISSN:0038-0830
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VOL.47;NO.1;PAGE.52-57(2001)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;A GPIB data acquisition system for high-rate and high-resolution sampling of time-varying signals is developed based on the real-time computer operating system RT-Linux. In this system, the real-time process for controlling GPIB devices is triggered by CPU interrupt requests raised by the hardware real-time clock, and is executed with the highest priority among all the processes under the control of the RT-Linux kernel. This mechanism enables stable, continuous, high-rate and high-resolution sampling with microsecond timing accuracy. The system is experimentally applied to superconducting gravimeter observations with very good results. This system provides a solution to the general problem of long-term degradation of the analog antialiasing filters used in many kinds of observations such as superconducting gravimetry. (author abst.) |
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