Data memory system for a seafloor-earthquake-measuring instrument

Conference · Thu Dec 31 23:00:00 EST 1981

OSTI ID:5252352

Ryerson, D E; Lopez, A A

A Seafloor Earthquake Measurement System for measuring strong motion seismic data has been developed and tested as part of the Offshore Instrumentation Program. The system's function is to gather data for the design and regulation of offshore structures such as oil platforms and pipelines. The seafloor package is a self-contained unit capable of operating unattended for up to one year with data readout on command via an underwater acoustic telemetry system. One of the problems with such a system is the large memory required to store seismic data. This memory also must consume very little power to conserve battery life. To meet these conditions a combination low-power CMOS buffer memory and a one-million-bit magnetic bubble main memory with switched power was developed. This paper describes these memories and how they are controlled by a microprocessor to save the best data since the last data readout.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5252352
• Report Number(s): SAND-82-0911C; CONF-820920-1; ON: DE82016808
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ALGORITHMS
COMMUNICATIONS
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL SYSTEMS
DATA ACQUISITION SYSTEMS
DATA TRANSMISSION
ELECTRONIC CIRCUITS
LEVELS
MATHEMATICAL LOGIC
MEASURING INSTRUMENTS
MEMORY DEVICES
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
OPERATION
SEISMIC ARRAYS
SEISMIC DETECTORS
TELEMETRY
UNDERWATER